Merge pull request #705 from devbv/master

portmap: fix bug that new udp connection deletes all existing conntrack entries

.github/workflows/test.yaml

@@ -4,7 +4,7 @@ name: test
 on: ["push", "pull_request"]
 
 env:
-  GO_VERSION: "1.15"
+  GO_VERSION: "1.17"
   LINUX_ARCHES: "amd64 386 arm arm64 s390x mips64le ppc64le"
 
 jobs:
@@ -35,10 +35,17 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install linux-modules-extra-$(uname -r)
+      - name: Install nftables
+        run: sudo apt-get install nftables
+
       - name: setup go
         uses: actions/setup-go@v2
         with:
           go-version: ${{ env.GO_VERSION }}
+      - name: Set up Go for root
+        run: |
+          sudo ln -sf `which go` `sudo which go` || true
+          sudo go version
       - uses: actions/checkout@v2
 
       - name: Install test binaries

OWNERS.md

@@ -1,7 +1,6 @@
 # Owners
 This is the official list of the CNI network plugins owners:
 - Bruce Ma <brucema19901024@gmail.com> (@mars1024)
-- Bryan Boreham <bryan@weave.works> (@bboreham)
 - Casey Callendrello <cdc@redhat.com> (@squeed)
 - Dan Williams <dcbw@redhat.com> (@dcbw)
 - Gabe Rosenhouse <grosenhouse@pivotal.io> (@rosenhouse)

README.md

@@ -1,6 +1,6 @@
-[![Build Status](https://travis-ci.org/containernetworking/plugins.svg?branch=master)](https://travis-ci.org/containernetworking/plugins)
+[![test](https://github.com/containernetworking/plugins/actions/workflows/test.yaml/badge.svg)](https://github.com/containernetworking/plugins/actions/workflows/test.yaml?query=branch%3Amaster)
 
-# plugins
+# Plugins
 Some CNI network plugins, maintained by the containernetworking team. For more information, see the [CNI website](https://www.cni.dev).
 
 Read [CONTRIBUTING](CONTRIBUTING.md) for build and test instructions.
@@ -14,7 +14,7 @@ Read [CONTRIBUTING](CONTRIBUTING.md) for build and test instructions.
 * `ptp`: Creates a veth pair.
 * `vlan`: Allocates a vlan device.
 * `host-device`: Move an already-existing device into a container.
-#### Windows: windows specific
+#### Windows: Windows specific
 * `win-bridge`: Creates a bridge, adds the host and the container to it.
 * `win-overlay`: Creates an overlay interface to the container.
 ### IPAM: IP address allocation
@@ -23,7 +23,6 @@ Read [CONTRIBUTING](CONTRIBUTING.md) for build and test instructions.
 * `static`:  Allocate a static IPv4/IPv6 addresses to container and it's useful in debugging purpose.
 
 ### Meta: other plugins
-* `flannel`: Generates an interface corresponding to a flannel config file
 * `tuning`: Tweaks sysctl parameters of an existing interface
 * `portmap`: An iptables-based portmapping plugin. Maps ports from the host's address space to the container.
 * `bandwidth`: Allows bandwidth-limiting through use of traffic control tbf (ingress/egress).

go.mod

@@ -1,25 +1,40 @@
 module github.com/containernetworking/plugins
 
-go 1.14
+go 1.17
 
 require (
-	github.com/Microsoft/hcsshim v0.8.16
+	github.com/Microsoft/hcsshim v0.8.20
 	github.com/alexflint/go-filemutex v1.1.0
 	github.com/buger/jsonparser v1.1.1
-	github.com/containernetworking/cni v1.0.0-rc1
+	github.com/containernetworking/cni v1.0.1
-	github.com/coreos/go-iptables v0.5.0
+	github.com/coreos/go-iptables v0.6.0
-	github.com/coreos/go-systemd/v22 v22.2.0
+	github.com/coreos/go-systemd/v22 v22.3.2
 	github.com/d2g/dhcp4 v0.0.0-20170904100407-a1d1b6c41b1c
 	github.com/d2g/dhcp4client v1.0.0
 	github.com/d2g/dhcp4server v0.0.0-20181031114812-7d4a0a7f59a5
-	github.com/godbus/dbus/v5 v5.0.3
+	github.com/godbus/dbus/v5 v5.0.4
-	github.com/j-keck/arping v1.0.1
+	github.com/mattn/go-shellwords v1.0.12
-	github.com/mattn/go-shellwords v1.0.11
+	github.com/networkplumbing/go-nft v0.2.0
-	github.com/onsi/ginkgo v1.13.0
+	github.com/onsi/ginkgo v1.16.4
-	github.com/onsi/gomega v1.10.3
+	github.com/onsi/gomega v1.15.0
-	github.com/safchain/ethtool v0.0.0-20190326074333-42ed695e3de8
+	github.com/safchain/ethtool v0.0.0-20210803160452-9aa261dae9b1
-	github.com/sirupsen/logrus v1.8.1 // indirect
 	github.com/vishvananda/netlink v1.1.1-0.20210330154013-f5de75959ad5
-	github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect
+	golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e
-	golang.org/x/sys v0.0.0-20210414055047-fe65e336abe0
+)
+
+require (
+	github.com/Microsoft/go-winio v0.4.17 // indirect
+	github.com/containerd/cgroups v1.0.1 // indirect
+	github.com/fsnotify/fsnotify v1.4.9 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
+	github.com/nxadm/tail v1.4.8 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/sirupsen/logrus v1.8.1 // indirect
+	github.com/vishvananda/netns v0.0.0-20210104183010-2eb08e3e575f // indirect
+	go.opencensus.io v0.22.3 // indirect
+	golang.org/x/net v0.0.0-20210428140749-89ef3d95e781 // indirect
+	golang.org/x/text v0.3.6 // indirect
+	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )

go.sum

@@ -41,19 +41,23 @@ github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jB
 github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
 github.com/Microsoft/go-winio v0.4.16-0.20201130162521-d1ffc52c7331/go.mod h1:XB6nPKklQyQ7GC9LdcBEcBl8PF76WugXOPRXwdLnMv0=
 github.com/Microsoft/go-winio v0.4.16/go.mod h1:XB6nPKklQyQ7GC9LdcBEcBl8PF76WugXOPRXwdLnMv0=
-github.com/Microsoft/go-winio v0.4.17-0.20210211115548-6eac466e5fa3 h1:mw6pDQqv38/WGF1cO/jF5t/jyAJ2yi7CmtFLLO5tGFI=
 github.com/Microsoft/go-winio v0.4.17-0.20210211115548-6eac466e5fa3/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/Microsoft/go-winio v0.4.17-0.20210324224401-5516f17a5958/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
+github.com/Microsoft/go-winio v0.4.17 h1:iT12IBVClFevaf8PuVyi3UmZOVh4OqnaLxDTW2O6j3w=
+github.com/Microsoft/go-winio v0.4.17/go.mod h1:JPGBdM1cNvN/6ISo+n8V5iA4v8pBzdOpzfwIujj1a84=
 github.com/Microsoft/hcsshim v0.8.6/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
 github.com/Microsoft/hcsshim v0.8.7-0.20190325164909-8abdbb8205e4/go.mod h1:Op3hHsoHPAvb6lceZHDtd9OkTew38wNoXnJs8iY7rUg=
 github.com/Microsoft/hcsshim v0.8.7/go.mod h1:OHd7sQqRFrYd3RmSgbgji+ctCwkbq2wbEYNSzOYtcBQ=
 github.com/Microsoft/hcsshim v0.8.9/go.mod h1:5692vkUqntj1idxauYlpoINNKeqCiG6Sg38RRsjT5y8=
 github.com/Microsoft/hcsshim v0.8.14/go.mod h1:NtVKoYxQuTLx6gEq0L96c9Ju4JbRJ4nY2ow3VK6a9Lg=
 github.com/Microsoft/hcsshim v0.8.15/go.mod h1:x38A4YbHbdxJtc0sF6oIz+RG0npwSCAvn69iY6URG00=
-github.com/Microsoft/hcsshim v0.8.16 h1:8/auA4LFIZFTGrqfKhGBSXwM6/4X1fHa/xniyEHu8ac=
 github.com/Microsoft/hcsshim v0.8.16/go.mod h1:o5/SZqmR7x9JNKsW3pu+nqHm0MF8vbA+VxGOoXdC600=
+github.com/Microsoft/hcsshim v0.8.20 h1:ZTwcx3NS8n07kPf/JZ1qwU6vnjhVPMUWlXBF8r9UxrE=
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 github.com/Microsoft/hcsshim/test v0.0.0-20201218223536-d3e5debf77da/go.mod h1:5hlzMzRKMLyo42nCZ9oml8AdTlq/0cvIaBv6tK1RehU=
 github.com/Microsoft/hcsshim/test v0.0.0-20210227013316-43a75bb4edd3/go.mod h1:mw7qgWloBUl75W/gVH3cQszUg1+gUITj7D6NY7ywVnY=
 github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb06e3pkSAbeQ52E9H9iFoQsEEwGN64994WTCIhntQ=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
 github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20170810143723-de5bf2ad4578/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/Shopify/logrus-bugsnag v0.0.0-20171204204709-577dee27f20d/go.mod h1:HI8ITrYtUY+O+ZhtlqUnD8+KwNPOyugEhfP9fdUIaEQ=
@@ -64,6 +68,7 @@ github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRF
 github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae/go.mod h1:CgnQgUtFrFz9mxFNtED3jI5tLDjKlOM+oUF/sTk6ps0=
 github.com/alexflint/go-filemutex v1.1.0 h1:IAWuUuRYL2hETx5b8vCgwnD+xSdlsTQY6s2JjBsqLdg=
 github.com/alexflint/go-filemutex v1.1.0/go.mod h1:7P4iRhttt/nUvUOrYIhcpMzv2G6CY9UnI16Z+UJqRyk=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/asaskevich/govalidator v0.0.0-20190424111038-f61b66f89f4a/go.mod h1:lB+ZfQJz7igIIfQNfa7Ml4HSf2uFQQRzpGGRXenZAgY=
 github.com/aws/aws-sdk-go v1.15.11/go.mod h1:mFuSZ37Z9YOHbQEwBWztmVzqXrEkub65tZoCYDt7FT0=
 github.com/beorn7/perks v0.0.0-20160804104726-4c0e84591b9a/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
@@ -83,6 +88,7 @@ github.com/bugsnag/bugsnag-go v0.0.0-20141110184014-b1d153021fcd/go.mod h1:2oa8n
 github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b/go.mod h1:obH5gd0BsqsP2LwDJ9aOkm/6J86V6lyAXCoQWGw3K50=
 github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0/go.mod h1:D/8v3kj0zr8ZAKg1AQ6crr+5VwKN5eIywRkfhyM/+dE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/checkpoint-restore/go-criu/v4 v4.1.0/go.mod h1:xUQBLp4RLc5zJtWY++yjOoMoB5lihDt7fai+75m+rGw=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
@@ -91,25 +97,30 @@ github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMn
 github.com/cilium/ebpf v0.0.0-20200110133405-4032b1d8aae3/go.mod h1:MA5e5Lr8slmEg9bt0VpxxWqJlO4iwu3FBdHUzV7wQVg=
 github.com/cilium/ebpf v0.0.0-20200702112145-1c8d4c9ef775/go.mod h1:7cR51M8ViRLIdUjrmSXlK9pkrsDlLHbO8jiB8X8JnOc=
 github.com/cilium/ebpf v0.2.0/go.mod h1:To2CFviqOWL/M0gIMsvSMlqe7em/l1ALkX1PyjrX2Qs=
+github.com/cilium/ebpf v0.4.0/go.mod h1:4tRaxcgiL706VnOzHOdBlY8IEAIdxINsQBcU4xJJXRs=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
 github.com/containerd/aufs v0.0.0-20200908144142-dab0cbea06f4/go.mod h1:nukgQABAEopAHvB6j7cnP5zJ+/3aVcE7hCYqvIwAHyE=
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-github.com/containerd/cgroups v0.0.0-20210114181951-8a68de567b68 h1:hkGVFjz+plgr5UfxZUTPFbUFIF/Km6/s+RVRIRHLrrY=
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 github.com/containerd/console v0.0.0-20191206165004-02ecf6a7291e/go.mod h1:8Pf4gM6VEbTNRIT26AyyU7hxdQU3MvAvxVI0sc00XBE=
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 github.com/containerd/containerd v1.3.0/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMXFTttgp+kVtyUA=
@@ -121,27 +132,35 @@ github.com/containerd/containerd v1.4.3/go.mod h1:bC6axHOhabU15QhwfG7w5PipXdVtMX
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@@ -150,19 +169,28 @@ github.com/containerd/ttrpc v1.0.2/go.mod h1:UAxOpgT9ziI0gJrmKvgcZivgxOp8iFPSk8h
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@@ -172,8 +200,8 @@ github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e h1:Wf6HqHfScWJN9
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@@ -194,6 +222,7 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
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@@ -218,6 +247,7 @@ github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7
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@@ -243,12 +273,14 @@ github.com/go-openapi/spec v0.19.3/go.mod h1:FpwSN1ksY1eteniUU7X0N/BgJ7a4WvBFVA8
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@@ -260,6 +292,7 @@ github.com/gogo/protobuf v1.3.2 h1:Ov1cvc58UF3b5XjBnZv7+opcTcQFZebYjWzi34vdm4Q=
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@@ -282,8 +315,10 @@ github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:W
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@@ -293,8 +328,8 @@ github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -307,6 +342,7 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4
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@@ -314,10 +350,13 @@ github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORR
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@@ -325,6 +364,7 @@ github.com/hashicorp/go-multierror v0.0.0-20161216184304-ed905158d874/go.mod h1:
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@@ -333,8 +373,6 @@ github.com/imdario/mergo v0.3.10/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH
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@@ -350,17 +388,20 @@ github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQL
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@@ -369,14 +410,16 @@ github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaO
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@@ -391,8 +434,12 @@ github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8m
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@@ -401,15 +448,17 @@ github.com/onsi/ginkgo v1.10.1/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+
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@@ -430,6 +479,8 @@ github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d/go.m
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@@ -441,6 +492,7 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
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@@ -450,11 +502,14 @@ github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:
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@@ -463,11 +518,13 @@ github.com/prometheus/procfs v0.0.8/go.mod h1:7Qr8sr6344vo1JqZ6HhLceV9o3AJ1Ff+Gx
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@@ -484,14 +541,20 @@ github.com/sirupsen/logrus v1.8.1/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic
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@@ -501,25 +564,28 @@ github.com/stretchr/testify v0.0.0-20180303142811-b89eecf5ca5d/go.mod h1:a8OnRci
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@@ -529,11 +595,14 @@ github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2
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@@ -559,6 +628,7 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
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@@ -589,6 +659,7 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
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@@ -622,8 +693,11 @@ golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81R
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+golang.org/x/net v0.0.0-20210428140749-89ef3d95e781/go.mod h1:OJAsFXCWl8Ukc7SiCT/9KSuxbyM7479/AVlXFRxuMCk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -638,6 +712,7 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -692,22 +767,27 @@ golang.org/x/sys v0.0.0-20200916030750-2334cc1a136f/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200922070232-aee5d888a860/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201112073958-5cba982894dd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201117170446-d9b008d0a637/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201201145000-ef89a241ccb3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201202213521-69691e467435/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210112080510-489259a85091/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210324051608-47abb6519492 h1:Paq34FxTluEPvVyayQqMPgHm+vTOrIifmcYxFBx9TLg=
 golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210414055047-fe65e336abe0 h1:g9s1Ppvvun/fI+BptTMj909BBIcGrzQ32k9FNlcevOE=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210414055047-fe65e336abe0/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e h1:WUoyKPm6nCo1BnNUvPGnFG3T5DUVem42yDJZZ4CNxMA=
+golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
-golang.org/x/text v0.3.4 h1:0YWbFKbhXG/wIiuHDSKpS0Iy7FSA+u45VtBMfQcFTTc=
 golang.org/x/text v0.3.4/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
+golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20180412165947-fbb02b2291d2/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -749,11 +829,12 @@ golang.org/x/tools v0.0.0-20200212150539-ea181f53ac56/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200224181240-023911ca70b2/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.0.0-20200304193943-95d2e580d8eb/go.mod h1:o4KQGtdN14AW+yjsvvwRTJJuXz8XRtIHtEnmAXLyFUw=
 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
+golang.org/x/tools v0.0.0-20201224043029-2b0845dc783e/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
 golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4fOWvOPXz4eW1wZW4PmDk9uLelYpA=
+golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/api v0.0.0-20160322025152-9bf6e6e569ff/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
 google.golang.org/api v0.4.0/go.mod h1:8k5glujaEP+g9n7WNsDg8QP6cUVNI86fCNMcbazEtwE=
@@ -817,8 +898,10 @@ google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
-google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0 h1:bxAC2xTBsZGibn2RTntX0oH50xLsqy1OxA9tTL3p/lk=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/airbrake/gobrake.v2 v2.0.9/go.mod h1:/h5ZAUhDkGaJfjzjKLSjv6zCL6O0LLBxU4K+aSYdM/U=
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -859,12 +942,24 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/api v0.20.1/go.mod h1:KqwcCVogGxQY3nBlRpwt+wpAMF/KjaCc7RpywacvqUo=
+k8s.io/api v0.20.4/go.mod h1:++lNL1AJMkDymriNniQsWRkMDzRaX2Y/POTUi8yvqYQ=
+k8s.io/api v0.20.6/go.mod h1:X9e8Qag6JV/bL5G6bU8sdVRltWKmdHsFUGS3eVndqE8=
 k8s.io/apimachinery v0.20.1/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
+k8s.io/apimachinery v0.20.4/go.mod h1:WlLqWAHZGg07AeltaI0MV5uk1Omp8xaN0JGLY6gkRpU=
+k8s.io/apimachinery v0.20.6/go.mod h1:ejZXtW1Ra6V1O5H8xPBGz+T3+4gfkTCeExAHKU57MAc=
 k8s.io/apiserver v0.20.1/go.mod h1:ro5QHeQkgMS7ZGpvf4tSMx6bBOgPfE+f52KwvXfScaU=
+k8s.io/apiserver v0.20.4/go.mod h1:Mc80thBKOyy7tbvFtB4kJv1kbdD0eIH8k8vianJcbFM=
+k8s.io/apiserver v0.20.6/go.mod h1:QIJXNt6i6JB+0YQRNcS0hdRHJlMhflFmsBDeSgT1r8Q=
 k8s.io/client-go v0.20.1/go.mod h1:/zcHdt1TeWSd5HoUe6elJmHSQ6uLLgp4bIJHVEuy+/Y=
+k8s.io/client-go v0.20.4/go.mod h1:LiMv25ND1gLUdBeYxBIwKpkSC5IsozMMmOOeSJboP+k=
+k8s.io/client-go v0.20.6/go.mod h1:nNQMnOvEUEsOzRRFIIkdmYOjAZrC8bgq0ExboWSU1I0=
 k8s.io/component-base v0.20.1/go.mod h1:guxkoJnNoh8LNrbtiQOlyp2Y2XFCZQmrcg2n/DeYNLk=
+k8s.io/component-base v0.20.4/go.mod h1:t4p9EdiagbVCJKrQ1RsA5/V4rFQNDfRlevJajlGwgjI=
+k8s.io/component-base v0.20.6/go.mod h1:6f1MPBAeI+mvuts3sIdtpjljHWBQ2cIy38oBIWMYnrM=
 k8s.io/cri-api v0.17.3/go.mod h1:X1sbHmuXhwaHs9xxYffLqJogVsnI+f6cPRcgPel7ywM=
 k8s.io/cri-api v0.20.1/go.mod h1:2JRbKt+BFLTjtrILYVqQK5jqhI+XNdF6UiGMgczeBCI=
+k8s.io/cri-api v0.20.4/go.mod h1:2JRbKt+BFLTjtrILYVqQK5jqhI+XNdF6UiGMgczeBCI=
+k8s.io/cri-api v0.20.6/go.mod h1:ew44AjNXwyn1s0U4xCKGodU7J1HzBeZ1MpGrpa5r8Yc=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.4.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
@@ -875,6 +970,8 @@ rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.14/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg=
+sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.15/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg=
 sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
+sigs.k8s.io/structured-merge-diff/v4 v4.0.3/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

pkg/hns/endpoint_windows.go

@@ -24,6 +24,7 @@ import (
 
 	"github.com/containernetworking/cni/pkg/types"
 	current "github.com/containernetworking/cni/pkg/types/100"
+
 	"github.com/containernetworking/plugins/pkg/errors"
 )
 
@@ -40,7 +41,7 @@ type EndpointInfo struct {
 	IpAddress    net.IP
 }
 
-// GetSandboxContainerID returns the sandbox ID of this pod
+// GetSandboxContainerID returns the sandbox ID of this pod.
 func GetSandboxContainerID(containerID string, netNs string) string {
 	if len(netNs) != 0 && netNs != pauseContainerNetNS {
 		splits := strings.SplitN(netNs, ":", 2)
@@ -52,7 +53,7 @@ func GetSandboxContainerID(containerID string, netNs string) string {
 	return containerID
 }
 
-// short function so we know when to return "" for a string
+// GetIpString returns the given IP as a string.
 func GetIpString(ip *net.IP) string {
 	if len(*ip) == 0 {
 		return ""
@@ -61,27 +62,41 @@ func GetIpString(ip *net.IP) string {
 	}
 }
 
+// GetDefaultDestinationPrefix returns the default destination prefix according to the given IP type.
+func GetDefaultDestinationPrefix(ip *net.IP) string {
+	destinationPrefix := "0.0.0.0/0"
+	if ip.To4() == nil {
+		destinationPrefix = "::/0"
+	}
+	return destinationPrefix
+}
+
+// ConstructEndpointName constructs endpoint id which is used to identify an endpoint from HNS/HCN.
+func ConstructEndpointName(containerID string, netNs string, networkName string) string {
+	return GetSandboxContainerID(containerID, netNs) + "_" + networkName
+}
+
+// GenerateHnsEndpoint generates an HNSEndpoint with given info and config.
 func GenerateHnsEndpoint(epInfo *EndpointInfo, n *NetConf) (*hcsshim.HNSEndpoint, error) {
 	// run the IPAM plugin and get back the config to apply
 	hnsEndpoint, err := hcsshim.GetHNSEndpointByName(epInfo.EndpointName)
 	if err != nil && !hcsshim.IsNotExist(err) {
-		return nil, errors.Annotatef(err, "failed to get endpoint %q", epInfo.EndpointName)
+		return nil, errors.Annotatef(err, "failed to get HNSEndpoint %s", epInfo.EndpointName)
 	}
 
 	if hnsEndpoint != nil {
-		if hnsEndpoint.VirtualNetwork != epInfo.NetworkId {
+		if strings.EqualFold(hnsEndpoint.VirtualNetwork, epInfo.NetworkId) {
-			_, err = hnsEndpoint.Delete()
+			return nil, fmt.Errorf("HNSEndpoint %s is already existed", epInfo.EndpointName)
-			if err != nil {
-				return nil, errors.Annotatef(err, "failed to delete endpoint %s", epInfo.EndpointName)
 		}
-			hnsEndpoint = nil
+		// remove endpoint if corrupted
+		if _, err = hnsEndpoint.Delete(); err != nil {
+			return nil, errors.Annotatef(err, "failed to delete corrupted HNSEndpoint %s", epInfo.EndpointName)
 		}
 	}
 
 	if n.LoopbackDSR {
-		n.ApplyLoopbackDSR(&epInfo.IpAddress)
+		n.ApplyLoopbackDSRPolicy(&epInfo.IpAddress)
 	}
-	if hnsEndpoint == nil {
 	hnsEndpoint = &hcsshim.HNSEndpoint{
 		Name:           epInfo.EndpointName,
 		VirtualNetwork: epInfo.NetworkId,
@@ -89,194 +104,94 @@ func GenerateHnsEndpoint(epInfo *EndpointInfo, n *NetConf) (*hcsshim.HNSEndpoint
 		DNSSuffix:      strings.Join(epInfo.DNS.Search, ","),
 		GatewayAddress: GetIpString(&epInfo.Gateway),
 		IPAddress:      epInfo.IpAddress,
-			Policies:       n.MarshalPolicies(),
+		Policies:       n.GetHNSEndpointPolicies(),
-		}
 	}
 	return hnsEndpoint, nil
 }
 
-func GenerateHcnEndpoint(epInfo *EndpointInfo, n *NetConf) (*hcn.HostComputeEndpoint, error) {
+// RemoveHnsEndpoint detaches the given name endpoint from container specified by containerID,
-	// run the IPAM plugin and get back the config to apply
+// or removes the given name endpoint completely.
-	hcnEndpoint, err := hcn.GetEndpointByName(epInfo.EndpointName)
+func RemoveHnsEndpoint(epName string, netns string, containerID string) error {
-	if err != nil && !hcn.IsNotFoundError(err) {
-		return nil, errors.Annotatef(err, "failed to get endpoint %q", epInfo.EndpointName)
-	}
-
-	if hcnEndpoint != nil {
-		// If the endpont already exists, then we should return error unless
-		// the endpoint is based on a different network then delete
-		// should that fail return error
-		if !strings.EqualFold(hcnEndpoint.HostComputeNetwork, epInfo.NetworkId) {
-			err = hcnEndpoint.Delete()
-			if err != nil {
-				return nil, errors.Annotatef(err, "failed to delete endpoint %s", epInfo.EndpointName)
-			}
-		} else {
-			return nil, fmt.Errorf("endpoint %q already exits", epInfo.EndpointName)
-		}
-	}
-
-	if hcnEndpoint == nil {
-		routes := []hcn.Route{
-			{
-				NextHop:           GetIpString(&epInfo.Gateway),
-				DestinationPrefix: GetDefaultDestinationPrefix(&epInfo.Gateway),
-			},
-		}
-
-		hcnDns := hcn.Dns{
-			Search:     epInfo.DNS.Search,
-			ServerList: epInfo.DNS.Nameservers,
-		}
-
-		hcnIpConfig := hcn.IpConfig{
-			IpAddress: GetIpString(&epInfo.IpAddress),
-		}
-		ipConfigs := []hcn.IpConfig{hcnIpConfig}
-
-		if n.LoopbackDSR {
-			n.ApplyLoopbackDSR(&epInfo.IpAddress)
-		}
-		hcnEndpoint = &hcn.HostComputeEndpoint{
-			SchemaVersion:      hcn.Version{Major: 2},
-			Name:               epInfo.EndpointName,
-			HostComputeNetwork: epInfo.NetworkId,
-			Dns:                hcnDns,
-			Routes:             routes,
-			IpConfigurations:   ipConfigs,
-			Policies: func() []hcn.EndpointPolicy {
-				if n.HcnPolicyArgs == nil {
-					n.HcnPolicyArgs = []hcn.EndpointPolicy{}
-				}
-				return n.HcnPolicyArgs
-			}(),
-		}
-	}
-	return hcnEndpoint, nil
-}
-
-// ConstructEndpointName constructs enpointId which is used to identify an endpoint from HNS
-// There is a special consideration for netNs name here, which is required for Windows Server 1709
-// containerID is the Id of the container on which the endpoint is worked on
-func ConstructEndpointName(containerID string, netNs string, networkName string) string {
-	return GetSandboxContainerID(containerID, netNs) + "_" + networkName
-}
-
-// DeprovisionEndpoint removes an endpoint from the container by sending a Detach request to HNS
-// For shared endpoint, ContainerDetach is used
-// for removing the endpoint completely, HotDetachEndpoint is used
-func DeprovisionEndpoint(epName string, netns string, containerID string) error {
 	if len(netns) == 0 {
 		return nil
 	}
 
 	hnsEndpoint, err := hcsshim.GetHNSEndpointByName(epName)
-
+	if err != nil {
 		if hcsshim.IsNotExist(err) {
 			return nil
-	} else if err != nil {
+		}
 		return errors.Annotatef(err, "failed to find HNSEndpoint %s", epName)
 	}
 
+	// for shared endpoint, detach it from the container
 	if netns != pauseContainerNetNS {
-		// Shared endpoint removal. Do not remove the endpoint.
+		_ = hnsEndpoint.ContainerDetach(containerID)
-		hnsEndpoint.ContainerDetach(containerID)
 		return nil
 	}
 
-	// Do not consider this as failure, else this would leak endpoints
+	// for removing the endpoint completely, hot detach is used at first
-	hcsshim.HotDetachEndpoint(containerID, hnsEndpoint.Id)
+	_ = hcsshim.HotDetachEndpoint(containerID, hnsEndpoint.Id)
-
+	_, _ = hnsEndpoint.Delete()
-	// Do not return error
-	hnsEndpoint.Delete()
-
 	return nil
 }
 
-type EndpointMakerFunc func() (*hcsshim.HNSEndpoint, error)
+type HnsEndpointMakerFunc func() (*hcsshim.HNSEndpoint, error)
 
-// ProvisionEndpoint provisions an endpoint to a container specified by containerID.
+// AddHnsEndpoint attaches an HNSEndpoint to a container specified by containerID.
-// If an endpoint already exists, the endpoint is reused.
+func AddHnsEndpoint(epName string, expectedNetworkId string, containerID string, netns string, makeEndpoint HnsEndpointMakerFunc) (*hcsshim.HNSEndpoint, error) {
-// This call is idempotent
+	hnsEndpoint, err := hcsshim.GetHNSEndpointByName(epName)
-func ProvisionEndpoint(epName string, expectedNetworkId string, containerID string, netns string, makeEndpoint EndpointMakerFunc) (*hcsshim.HNSEndpoint, error) {
-	// On the second add call we expect that the endpoint already exists. If it
-	// does not then we should return an error.
-	if netns != pauseContainerNetNS {
-		_, err := hcsshim.GetHNSEndpointByName(epName)
 	if err != nil {
+		if !hcsshim.IsNotExist(err) {
 			return nil, errors.Annotatef(err, "failed to find HNSEndpoint %s", epName)
 		}
 	}
 
-	// check if endpoint already exists
+	// for shared endpoint, we expect that the endpoint already exists
-	createEndpoint := true
+	if netns != pauseContainerNetNS {
-	hnsEndpoint, err := hcsshim.GetHNSEndpointByName(epName)
+		if hnsEndpoint == nil {
-	if hnsEndpoint != nil && strings.EqualFold(hnsEndpoint.VirtualNetwork, expectedNetworkId) {
+			return nil, errors.Annotatef(err, "failed to find HNSEndpoint %s", epName)
-		createEndpoint = false
+		}
 	}
 
-	if createEndpoint {
+	// verify the existing endpoint is corrupted or not
 	if hnsEndpoint != nil {
-			if _, err = hnsEndpoint.Delete(); err != nil {
+		if !strings.EqualFold(hnsEndpoint.VirtualNetwork, expectedNetworkId) {
-				return nil, errors.Annotate(err, "failed to delete the stale HNSEndpoint")
+			if _, err := hnsEndpoint.Delete(); err != nil {
+				return nil, errors.Annotatef(err, "failed to delete corrupted HNSEndpoint %s", epName)
+			}
+			hnsEndpoint = nil
 		}
 	}
 
+	// create endpoint if not found
+	var isNewEndpoint bool
+	if hnsEndpoint == nil {
 		if hnsEndpoint, err = makeEndpoint(); err != nil {
 			return nil, errors.Annotate(err, "failed to make a new HNSEndpoint")
 		}
-
 		if hnsEndpoint, err = hnsEndpoint.Create(); err != nil {
 			return nil, errors.Annotate(err, "failed to create the new HNSEndpoint")
 		}
-
+		isNewEndpoint = true
 	}
 
-	// hot attach
+	// attach to container
 	if err := hcsshim.HotAttachEndpoint(containerID, hnsEndpoint.Id); err != nil {
-		if createEndpoint {
+		if isNewEndpoint {
-			err := DeprovisionEndpoint(epName, netns, containerID)
+			if err := RemoveHnsEndpoint(epName, netns, containerID); err != nil {
-			if err != nil {
+				return nil, errors.Annotatef(err, "failed to remove the new HNSEndpoint %s after attaching container %s failure", hnsEndpoint.Id, containerID)
-				return nil, errors.Annotatef(err, "failed to Deprovsion after HotAttach failure")
 			}
-		}
+		} else if hcsshim.ErrComputeSystemDoesNotExist == err {
-		if hcsshim.ErrComputeSystemDoesNotExist == err {
 			return hnsEndpoint, nil
 		}
-		return nil, err
+		return nil, errors.Annotatef(err, "failed to attach container %s to HNSEndpoint %s", containerID, hnsEndpoint.Id)
 	}
-
 	return hnsEndpoint, nil
 }
 
-type HcnEndpointMakerFunc func() (*hcn.HostComputeEndpoint, error)
+// ConstructHnsResult constructs the CNI result for the HNSEndpoint.
-
+func ConstructHnsResult(hnsNetwork *hcsshim.HNSNetwork, hnsEndpoint *hcsshim.HNSEndpoint) (*current.Result, error) {
-func AddHcnEndpoint(epName string, expectedNetworkId string, namespace string,
-	makeEndpoint HcnEndpointMakerFunc) (*hcn.HostComputeEndpoint, error) {
-
-	hcnEndpoint, err := makeEndpoint()
-	if err != nil {
-		return nil, errors.Annotate(err, "failed to make a new HNSEndpoint")
-	}
-
-	if hcnEndpoint, err = hcnEndpoint.Create(); err != nil {
-		return nil, errors.Annotate(err, "failed to create the new HNSEndpoint")
-	}
-
-	err = hcn.AddNamespaceEndpoint(namespace, hcnEndpoint.Id)
-	if err != nil {
-		err := RemoveHcnEndpoint(epName)
-		if err != nil {
-			return nil, errors.Annotatef(err, "failed to Remove Endpoint after AddNamespaceEndpoint failure")
-		}
-		return nil, errors.Annotate(err, "failed to Add endpoint to namespace")
-	}
-	return hcnEndpoint, nil
-
-}
-
-// ConstructResult constructs the CNI result for the endpoint
-func ConstructResult(hnsNetwork *hcsshim.HNSNetwork, hnsEndpoint *hcsshim.HNSEndpoint) (*current.Result, error) {
 	resultInterface := &current.Interface{
 		Name: hnsEndpoint.Name,
 		Mac:  hnsEndpoint.MacAddress,
@@ -305,24 +220,121 @@ func ConstructResult(hnsNetwork *hcsshim.HNSNetwork, hnsEndpoint *hcsshim.HNSEnd
 	return result, nil
 }
 
-// This version follows the v2 workflow of removing the endpoint from the namespace and deleting it
+// GenerateHcnEndpoint generates a HostComputeEndpoint with given info and config.
+func GenerateHcnEndpoint(epInfo *EndpointInfo, n *NetConf) (*hcn.HostComputeEndpoint, error) {
+	// run the IPAM plugin and get back the config to apply
+	hcnEndpoint, err := hcn.GetEndpointByName(epInfo.EndpointName)
+	if err != nil && !hcn.IsNotFoundError(err) {
+		return nil, errors.Annotatef(err, "failed to get HostComputeEndpoint %s", epInfo.EndpointName)
+	}
+
+	// verify the existing endpoint is corrupted or not
+	if hcnEndpoint != nil {
+		if strings.EqualFold(hcnEndpoint.HostComputeNetwork, epInfo.NetworkId) {
+			return nil, fmt.Errorf("HostComputeNetwork %s is already existed", epInfo.EndpointName)
+		}
+		// remove endpoint if corrupted
+		if err := hcnEndpoint.Delete(); err != nil {
+			return nil, errors.Annotatef(err, "failed to delete corrupted HostComputeEndpoint %s", epInfo.EndpointName)
+		}
+	}
+
+	if n.LoopbackDSR {
+		n.ApplyLoopbackDSRPolicy(&epInfo.IpAddress)
+	}
+	hcnEndpoint = &hcn.HostComputeEndpoint{
+		SchemaVersion: hcn.SchemaVersion{
+			Major: 2,
+			Minor: 0,
+		},
+		Name:               epInfo.EndpointName,
+		HostComputeNetwork: epInfo.NetworkId,
+		Dns: hcn.Dns{
+			Domain:     epInfo.DNS.Domain,
+			Search:     epInfo.DNS.Search,
+			ServerList: epInfo.DNS.Nameservers,
+			Options:    epInfo.DNS.Options,
+		},
+		Routes: []hcn.Route{
+			{
+				NextHop:           GetIpString(&epInfo.Gateway),
+				DestinationPrefix: GetDefaultDestinationPrefix(&epInfo.Gateway),
+			},
+		},
+		IpConfigurations: []hcn.IpConfig{
+			{
+				IpAddress: GetIpString(&epInfo.IpAddress),
+			},
+		},
+		Policies: n.GetHostComputeEndpointPolicies(),
+	}
+	return hcnEndpoint, nil
+}
+
+// RemoveHcnEndpoint removes the given name endpoint from namespace.
 func RemoveHcnEndpoint(epName string) error {
 	hcnEndpoint, err := hcn.GetEndpointByName(epName)
+	if err != nil {
 		if hcn.IsNotFoundError(err) {
 			return nil
-	} else if err != nil {
-		_ = fmt.Errorf("[win-cni] Failed to find endpoint %v, err:%v", epName, err)
-		return err
 		}
-	if hcnEndpoint != nil {
+		return errors.Annotatef(err, "failed to find HostComputeEndpoint %s", epName)
+	}
+
 	err = hcnEndpoint.Delete()
 	if err != nil {
-			return fmt.Errorf("[win-cni] Failed to delete endpoint %v, err:%v", epName, err)
+		return errors.Annotatef(err, "failed to remove HostComputeEndpoint %s", epName)
-		}
 	}
 	return nil
 }
 
+type HcnEndpointMakerFunc func() (*hcn.HostComputeEndpoint, error)
+
+// AddHcnEndpoint attaches a HostComputeEndpoint to the given namespace.
+func AddHcnEndpoint(epName string, expectedNetworkId string, namespace string, makeEndpoint HcnEndpointMakerFunc) (*hcn.HostComputeEndpoint, error) {
+	hcnEndpoint, err := hcn.GetEndpointByName(epName)
+	if err != nil {
+		if !hcn.IsNotFoundError(err) {
+			return nil, errors.Annotatef(err, "failed to find HostComputeEndpoint %s", epName)
+		}
+	}
+
+	// verify the existing endpoint is corrupted or not
+	if hcnEndpoint != nil {
+		if !strings.EqualFold(hcnEndpoint.HostComputeNetwork, expectedNetworkId) {
+			if err := hcnEndpoint.Delete(); err != nil {
+				return nil, errors.Annotatef(err, "failed to delete corrupted HostComputeEndpoint %s", epName)
+			}
+			hcnEndpoint = nil
+		}
+	}
+
+	// create endpoint if not found
+	var isNewEndpoint bool
+	if hcnEndpoint == nil {
+		if hcnEndpoint, err = makeEndpoint(); err != nil {
+			return nil, errors.Annotate(err, "failed to make a new HostComputeEndpoint")
+		}
+		if hcnEndpoint, err = hcnEndpoint.Create(); err != nil {
+			return nil, errors.Annotate(err, "failed to create the new HostComputeEndpoint")
+		}
+		isNewEndpoint = true
+	}
+
+	// add to namespace
+	err = hcn.AddNamespaceEndpoint(namespace, hcnEndpoint.Id)
+	if err != nil {
+		if isNewEndpoint {
+			if err := RemoveHcnEndpoint(epName); err != nil {
+				return nil, errors.Annotatef(err, "failed to remove the new HostComputeEndpoint %s after adding HostComputeNamespace %s failure", epName, namespace)
+			}
+		}
+		return nil, errors.Annotatef(err, "failed to add HostComputeEndpoint %s to HostComputeNamespace %s", epName, namespace)
+	}
+	return hcnEndpoint, nil
+}
+
+// ConstructHcnResult constructs the CNI result for the HostComputeEndpoint.
 func ConstructHcnResult(hcnNetwork *hcn.HostComputeNetwork, hcnEndpoint *hcn.HostComputeEndpoint) (*current.Result, error) {
 	resultInterface := &current.Interface{
 		Name: hcnEndpoint.Name,
@@ -347,6 +359,8 @@ func ConstructHcnResult(hcnNetwork *hcn.HostComputeNetwork, hcnEndpoint *hcn.Hos
 		DNS: types.DNS{
 			Search:      hcnEndpoint.Dns.Search,
 			Nameservers: hcnEndpoint.Dns.ServerList,
+			Options:     hcnEndpoint.Dns.Options,
+			Domain:      hcnEndpoint.Dns.Domain,
 		},
 	}
 

pkg/hns/netconf_suite_windows_test.go

@@ -20,7 +20,7 @@ import (
 	"testing"
 )
 
-func TestHns(t *testing.T) {
+func TestNetConf(t *testing.T) {
 	RegisterFailHandler(Fail)
-	RunSpecs(t, "HNS NetConf Suite")
+	RunSpecs(t, "NetConf Suite")
 }

pkg/hns/netconf_windows.go

@@ -17,9 +17,10 @@ package hns
 import (
 	"bytes"
 	"encoding/json"
+	"errors"
 	"fmt"
 	"net"
-
+	"strconv"
 	"strings"
 
 	"github.com/Microsoft/hcsshim/hcn"
@@ -30,16 +31,16 @@ import (
 // NetConf is the CNI spec
 type NetConf struct {
 	types.NetConf
-	// ApiVersion is either 1 or 2, which specifies which hns APIs to call
+	// ApiVersion specifies the policies type of HNS or HCN, select one of [1, 2].
-	ApiVersion int `json:"ApiVersion"`
+	// HNS is the v1 API, which is the default version and applies to dockershim.
-	// V2 Api Policies
+	// HCN is the v2 API, which can leverage HostComputeNamespace and use in containerd.
-	HcnPolicyArgs []hcn.EndpointPolicy `json:"HcnPolicyArgs,omitempty"`
+	ApiVersion int `json:"apiVersion,omitempty"`
-	// V1 Api Policies
+	// Policies specifies the policy list for HNSEndpoint or HostComputeEndpoint.
-	Policies []policy `json:"policies,omitempty"`
+	Policies []Policy `json:"policies,omitempty"`
-	// Options to be passed in by the runtime
+	// RuntimeConfig represents the options to be passed in by the runtime.
 	RuntimeConfig RuntimeConfig `json:"runtimeConfig"`
-	// If true, adds a policy to endpoints to support loopback direct server return
+	// LoopbackDSR specifies whether to support loopback direct server return.
-	LoopbackDSR bool `json:"loopbackDSR"`
+	LoopbackDSR bool `json:"loopbackDSR,omitempty"`
 }
 
 type RuntimeDNS struct {
@@ -54,42 +55,67 @@ type PortMapEntry struct {
 	HostIP        string `json:"hostIP,omitempty"`
 }
 
+// constants of the supported Windows Socket protocol,
+// ref to https://docs.microsoft.com/en-us/dotnet/api/system.net.sockets.protocoltype.
+var protocolEnums = map[string]uint32{
+	"icmpv4": 1,
+	"igmp":   2,
+	"tcp":    6,
+	"udp":    17,
+	"icmpv6": 58,
+}
+
+func (p *PortMapEntry) GetProtocolEnum() (uint32, error) {
+	var u, err = strconv.ParseUint(p.Protocol, 0, 10)
+	if err != nil {
+		var pe, exist = protocolEnums[strings.ToLower(p.Protocol)]
+		if !exist {
+			return 0, errors.New("invalid protocol supplied to port mapping policy")
+		}
+		return pe, nil
+	}
+	return uint32(u), nil
+}
+
 type RuntimeConfig struct {
 	DNS      RuntimeDNS     `json:"dns"`
 	PortMaps []PortMapEntry `json:"portMappings,omitempty"`
 }
 
-type policy struct {
+type Policy struct {
 	Name  string          `json:"name"`
 	Value json.RawMessage `json:"value"`
 }
 
-func GetDefaultDestinationPrefix(ip *net.IP) string {
+// GetHNSEndpointPolicies converts the configuration policies to HNSEndpoint policies.
-	destinationPrefix := "0.0.0.0/0"
+func (n *NetConf) GetHNSEndpointPolicies() []json.RawMessage {
-	if ipv6 := ip.To4(); ipv6 == nil {
+	result := make([]json.RawMessage, 0, len(n.Policies))
-		destinationPrefix = "::/0"
+	for _, p := range n.Policies {
+		if !strings.EqualFold(p.Name, "EndpointPolicy") {
+			continue
 		}
-	return destinationPrefix
+		result = append(result, p.Value)
+	}
+	return result
 }
 
-func (n *NetConf) ApplyLoopbackDSR(ip *net.IP) {
+// GetHostComputeEndpointPolicies converts the configuration policies to HostComputeEndpoint policies.
-	value := fmt.Sprintf(`"Destinations" : ["%s"]`, ip.String())
+func (n *NetConf) GetHostComputeEndpointPolicies() []hcn.EndpointPolicy {
-	if n.ApiVersion == 2 {
+	result := make([]hcn.EndpointPolicy, 0, len(n.Policies))
-		hcnLoopbackRoute := hcn.EndpointPolicy{
+	for _, p := range n.Policies {
-			Type:     "OutBoundNAT",
+		if !strings.EqualFold(p.Name, "EndpointPolicy") {
-			Settings: []byte(fmt.Sprintf("{%s}", value)),
+			continue
 		}
-		n.HcnPolicyArgs = append(n.HcnPolicyArgs, hcnLoopbackRoute)
+		var policy hcn.EndpointPolicy
-	} else {
+		if err := json.Unmarshal(p.Value, &policy); err != nil {
-		hnsLoopbackRoute := policy{
+			continue
-			Name:  "EndpointPolicy",
-			Value: []byte(fmt.Sprintf(`{"Type": "OutBoundNAT", %s}`, value)),
 		}
-		n.Policies = append(n.Policies, hnsLoopbackRoute)
+		result = append(result, policy)
 	}
+	return result
 }
 
-// If runtime dns values are there use that else use cni conf supplied dns
+// GetDNS returns the DNS values if they are there use that else use netconf supplied DNS.
 func (n *NetConf) GetDNS() types.DNS {
 	dnsResult := n.DNS
 	if len(n.RuntimeConfig.DNS.Nameservers) > 0 {
@@ -101,136 +127,222 @@ func (n *NetConf) GetDNS() types.DNS {
 	return dnsResult
 }
 
-// MarshalPolicies converts the Endpoint policies in Policies
+// ApplyLoopbackDSRPolicy configures the given IP to support loopback DSR.
-// to HNS specific policies as Json raw bytes
+func (n *NetConf) ApplyLoopbackDSRPolicy(ip *net.IP) {
-func (n *NetConf) MarshalPolicies() []json.RawMessage {
+	if err := hcn.DSRSupported(); err != nil || ip == nil {
-	if n.Policies == nil {
-		n.Policies = make([]policy, 0)
-	}
-
-	result := make([]json.RawMessage, 0, len(n.Policies))
-	for _, p := range n.Policies {
-		if !strings.EqualFold(p.Name, "EndpointPolicy") {
-			continue
-		}
-
-		result = append(result, p.Value)
-	}
-
-	return result
-}
-
-// ApplyOutboundNatPolicy applies NAT Policy in VFP using HNS
-// Simultaneously an exception is added for the network that has to be Nat'd
-func (n *NetConf) ApplyOutboundNatPolicy(nwToNat string) {
-	if n.Policies == nil {
-		n.Policies = make([]policy, 0)
-	}
-
-	nwToNatBytes := []byte(nwToNat)
-
-	for i, p := range n.Policies {
-		if !strings.EqualFold(p.Name, "EndpointPolicy") {
-			continue
-		}
-
-		typeValue, err := jsonparser.GetUnsafeString(p.Value, "Type")
-		if err != nil || len(typeValue) == 0 {
-			continue
-		}
-
-		if !strings.EqualFold(typeValue, "OutBoundNAT") {
-			continue
-		}
-
-		exceptionListValue, dt, _, _ := jsonparser.Get(p.Value, "ExceptionList")
-		// OutBoundNAT must with ExceptionList, so don't need to judge jsonparser.NotExist
-		if dt == jsonparser.Array {
-			buf := bytes.Buffer{}
-			buf.WriteString(`{"Type": "OutBoundNAT", "ExceptionList": [`)
-
-			jsonparser.ArrayEach(exceptionListValue, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
-				if dataType == jsonparser.String && len(value) != 0 {
-					if bytes.Compare(value, nwToNatBytes) != 0 {
-						buf.WriteByte('"')
-						buf.Write(value)
-						buf.WriteByte('"')
-						buf.WriteByte(',')
-					}
-				}
-			})
-
-			buf.WriteString(`"` + nwToNat + `"]}`)
-
-			n.Policies[i] = policy{
-				Name:  "EndpointPolicy",
-				Value: buf.Bytes(),
-			}
-		} else {
-			n.Policies[i] = policy{
-				Name:  "EndpointPolicy",
-				Value: []byte(`{"Type": "OutBoundNAT", "ExceptionList": ["` + nwToNat + `"]}`),
-			}
-		}
-
 		return
 	}
 
-	// didn't find the policyArg, add it
+	toPolicyValue := func(addr string) json.RawMessage {
-	n.Policies = append(n.Policies, policy{
+		if n.ApiVersion == 2 {
-		Name:  "EndpointPolicy",
+			return bprintf(`{"Type": "OutBoundNAT", "Settings": {"Destinations": ["%s"]}}`, addr)
-		Value: []byte(`{"Type": "OutBoundNAT", "ExceptionList": ["` + nwToNat + `"]}`),
-	})
-}
-
-// ApplyDefaultPAPolicy is used to configure a endpoint PA policy in HNS
-func (n *NetConf) ApplyDefaultPAPolicy(paAddress string) {
-	if n.Policies == nil {
-		n.Policies = make([]policy, 0)
 		}
+		return bprintf(`{"Type": "OutBoundNAT", "Destinations": ["%s"]}`, addr)
+	}
+	ipBytes := []byte(ip.String())
 
-	// if its already present, leave untouched
+	// find OutBoundNAT policy
-	for i, p := range n.Policies {
+	for i := range n.Policies {
+		p := &n.Policies[i]
 		if !strings.EqualFold(p.Name, "EndpointPolicy") {
 			continue
 		}
 
-		paValue, dt, _, _ := jsonparser.Get(p.Value, "PA")
+		// filter OutBoundNAT policy
+		typeValue, _ := jsonparser.GetUnsafeString(p.Value, "Type")
+		if typeValue != "OutBoundNAT" {
+			continue
+		}
+
+		// parse destination address list
+		var (
+			destinationsValue []byte
+			dt                jsonparser.ValueType
+		)
+		if n.ApiVersion == 2 {
+			destinationsValue, dt, _, _ = jsonparser.Get(p.Value, "Settings", "Destinations")
+		} else {
+			destinationsValue, dt, _, _ = jsonparser.Get(p.Value, "Destinations")
+		}
+
+		// skip if Destinations/DestinationList field is not found
 		if dt == jsonparser.NotExist {
 			continue
-		} else if dt == jsonparser.String && len(paValue) != 0 {
-			// found it, don't override
-			return
 		}
 
-		n.Policies[i] = policy{
+		// return if found the given address
-			Name:  "EndpointPolicy",
+		if dt == jsonparser.Array {
-			Value: []byte(`{"Type": "PA", "PA": "` + paAddress + `"}`),
+			var found bool
+			_, _ = jsonparser.ArrayEach(destinationsValue, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
+				if dataType == jsonparser.String && len(value) != 0 {
+					if bytes.Compare(value, ipBytes) == 0 {
+						found = true
 					}
+				}
+			})
+			if found {
 				return
 			}
+		}
+	}
 
-	// didn't find the policyArg, add it
+	// or add a new OutBoundNAT if not found
-	n.Policies = append(n.Policies, policy{
+	n.Policies = append(n.Policies, Policy{
 		Name:  "EndpointPolicy",
-		Value: []byte(`{"Type": "PA", "PA": "` + paAddress + `"}`),
+		Value: toPolicyValue(ip.String()),
 	})
 }
 
-// ApplyPortMappingPolicy is used to configure HostPort<>ContainerPort mapping in HNS
+// ApplyOutboundNatPolicy applies the sNAT policy in HNS/HCN and configures the given CIDR as an exception.
+func (n *NetConf) ApplyOutboundNatPolicy(exceptionCIDR string) {
+	if exceptionCIDR == "" {
+		return
+	}
+
+	toPolicyValue := func(cidr ...string) json.RawMessage {
+		if n.ApiVersion == 2 {
+			return bprintf(`{"Type": "OutBoundNAT", "Settings": {"Exceptions": ["%s"]}}`, strings.Join(cidr, `","`))
+		}
+		return bprintf(`{"Type": "OutBoundNAT", "ExceptionList": ["%s"]}`, strings.Join(cidr, `","`))
+	}
+	exceptionCIDRBytes := []byte(exceptionCIDR)
+
+	// find OutBoundNAT policy
+	for i := range n.Policies {
+		p := &n.Policies[i]
+		if !strings.EqualFold(p.Name, "EndpointPolicy") {
+			continue
+		}
+
+		// filter OutBoundNAT policy
+		typeValue, _ := jsonparser.GetUnsafeString(p.Value, "Type")
+		if typeValue != "OutBoundNAT" {
+			continue
+		}
+
+		// parse exception CIDR list
+		var (
+			exceptionsValue []byte
+			dt              jsonparser.ValueType
+		)
+		if n.ApiVersion == 2 {
+			exceptionsValue, dt, _, _ = jsonparser.Get(p.Value, "Settings", "Exceptions")
+		} else {
+			exceptionsValue, dt, _, _ = jsonparser.Get(p.Value, "ExceptionList")
+		}
+
+		// skip if Exceptions/ExceptionList field is not found
+		if dt == jsonparser.NotExist {
+			continue
+		}
+
+		// return if found the given CIDR
+		if dt == jsonparser.Array {
+			var found bool
+			_, _ = jsonparser.ArrayEach(exceptionsValue, func(value []byte, dataType jsonparser.ValueType, offset int, err error) {
+				if dataType == jsonparser.String && len(value) != 0 {
+					if bytes.Compare(value, exceptionCIDRBytes) == 0 {
+						found = true
+					}
+				}
+			})
+			if found {
+				return
+			}
+		}
+	}
+
+	// or add a new OutBoundNAT if not found
+	n.Policies = append(n.Policies, Policy{
+		Name:  "EndpointPolicy",
+		Value: toPolicyValue(exceptionCIDR),
+	})
+}
+
+// ApplyDefaultPAPolicy applies an endpoint PA policy in HNS/HCN.
+func (n *NetConf) ApplyDefaultPAPolicy(address string) {
+	if address == "" {
+		return
+	}
+
+	toPolicyValue := func(addr string) json.RawMessage {
+		if n.ApiVersion == 2 {
+			return bprintf(`{"Type": "ProviderAddress", "Settings": {"ProviderAddress": "%s"}}`, addr)
+		}
+		return bprintf(`{"Type": "PA", "PA": "%s"}`, addr)
+	}
+	addressBytes := []byte(address)
+
+	// find ProviderAddress policy
+	for i := range n.Policies {
+		p := &n.Policies[i]
+		if !strings.EqualFold(p.Name, "EndpointPolicy") {
+			continue
+		}
+
+		// filter ProviderAddress policy
+		typeValue, _ := jsonparser.GetUnsafeString(p.Value, "Type")
+		if typeValue != "PA" && typeValue != "ProviderAddress" {
+			continue
+		}
+
+		// parse provider address
+		var (
+			paValue []byte
+			dt      jsonparser.ValueType
+		)
+		if n.ApiVersion == 2 {
+			paValue, dt, _, _ = jsonparser.Get(p.Value, "Settings", "ProviderAddress")
+		} else {
+			paValue, dt, _, _ = jsonparser.Get(p.Value, "PA")
+		}
+
+		// skip if ProviderAddress/PA field is not found
+		if dt == jsonparser.NotExist {
+			continue
+		}
+
+		// return if found the given address
+		if dt == jsonparser.String && bytes.Compare(paValue, addressBytes) == 0 {
+			return
+		}
+	}
+
+	// or add a new ProviderAddress if not found
+	n.Policies = append(n.Policies, Policy{
+		Name:  "EndpointPolicy",
+		Value: toPolicyValue(address),
+	})
+}
+
+// ApplyPortMappingPolicy applies the host/container port mapping policies in HNS/HCN.
 func (n *NetConf) ApplyPortMappingPolicy(portMappings []PortMapEntry) {
-	if portMappings == nil {
+	if len(portMappings) == 0 {
 		return
 	}
 
-	if n.Policies == nil {
+	toPolicyValue := func(p *PortMapEntry) json.RawMessage {
-		n.Policies = make([]policy, 0)
+		if n.ApiVersion == 2 {
+			var protocolEnum, _ = p.GetProtocolEnum()
+			return bprintf(`{"Type": "PortMapping", "Settings": {"InternalPort": %d, "ExternalPort": %d, "Protocol": %d, "VIP": "%s"}}`, p.ContainerPort, p.HostPort, protocolEnum, p.HostIP)
+		}
+		return bprintf(`{"Type": "NAT", "InternalPort": %d, "ExternalPort": %d, "Protocol": "%s"}`, p.ContainerPort, p.HostPort, p.Protocol)
 	}
 
-	for _, portMapping := range portMappings {
+	for i := range portMappings {
-		n.Policies = append(n.Policies, policy{
+		p := &portMappings[i]
+		// skip the invalid protocol mapping
+		if _, err := p.GetProtocolEnum(); err != nil {
+			continue
+		}
+		n.Policies = append(n.Policies, Policy{
 			Name:  "EndpointPolicy",
-			Value: []byte(fmt.Sprintf(`{"Type": "NAT", "InternalPort": %d, "ExternalPort": %d, "Protocol": "%s"}`, portMapping.ContainerPort, portMapping.HostPort, portMapping.Protocol)),
+			Value: toPolicyValue(p),
 		})
 	}
 }
+
+// bprintf is similar to fmt.Sprintf and returns a byte array as result.
+func bprintf(format string, a ...interface{}) []byte {
+	return []byte(fmt.Sprintf(format, a...))
+}

pkg/hns/netconf_windows_test.go

@@ -15,221 +15,585 @@ package hns
 
 import (
 	"encoding/json"
+	"net"
 
+	"github.com/Microsoft/hcsshim/hcn"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 )
 
-var _ = Describe("HNS NetConf", func() {
+var _ = Describe("NetConf", func() {
-	Describe("ApplyOutBoundNATPolicy", func() {
+	Describe("ApplyLoopbackDSRPolicy", func() {
-		Context("when not set by user", func() {
+		Context("via v1 api", func() {
-			It("sets it by adding a policy", func() {
+			var n NetConf
+			BeforeEach(func() {
+				n = NetConf{}
+			})
 
-				// apply it
+			It("filter out duplicated IP", func() {
-				n := NetConf{}
+				// mock duplicated IP
-				n.ApplyOutboundNatPolicy("192.168.0.0/16")
+				ip := net.ParseIP("172.16.0.12")
+				n.ApplyLoopbackDSRPolicy(&ip)
+				n.ApplyLoopbackDSRPolicy(&ip)
 
+				// only one policy
 				addlArgs := n.Policies
 				Expect(addlArgs).Should(HaveLen(1))
 
+				// normal type judgement
 				policy := addlArgs[0]
 				Expect(policy.Name).Should(Equal("EndpointPolicy"))
-
 				value := make(map[string]interface{})
 				json.Unmarshal(policy.Value, &value)
-
 				Expect(value).Should(HaveKey("Type"))
-				Expect(value).Should(HaveKey("ExceptionList"))
 				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Destinations"))
 
-				exceptionList := value["ExceptionList"].([]interface{})
+				// and only one item
-				Expect(exceptionList).Should(HaveLen(1))
+				destinationList := value["Destinations"].([]interface{})
-				Expect(exceptionList[0].(string)).Should(Equal("192.168.0.0/16"))
+				Expect(destinationList).Should(HaveLen(1))
+				Expect(destinationList[0].(string)).Should(Equal("172.16.0.12"))
+			})
+
+			It("append different IP", func() {
+				// mock different IP
+				ip1 := net.ParseIP("172.16.0.12")
+				n.ApplyLoopbackDSRPolicy(&ip1)
+				ip2 := net.ParseIP("172.16.0.13")
+				n.ApplyLoopbackDSRPolicy(&ip2)
+
+				// will be two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[1] // pick second item
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Destinations"))
+
+				// only one item
+				destinationList := value["Destinations"].([]interface{})
+				Expect(destinationList).Should(HaveLen(1))
+				Expect(destinationList[0].(string)).Should(Equal("172.16.0.13"))
 			})
 		})
 
-		Context("when set by user", func() {
+		Context("via v2 api", func() {
-			It("appends exceptions to the existing policy", func() {
+			var n NetConf
-				// first set it
+			BeforeEach(func() {
-				n := NetConf{}
+				n = NetConf{ApiVersion: 2}
-				n.ApplyOutboundNatPolicy("192.168.0.0/16")
+			})
 
-				// then attempt to update it
+			It("filter out duplicated IP", func() {
-				n.ApplyOutboundNatPolicy("10.244.0.0/16")
+				// mock duplicated IP
+				ip := net.ParseIP("172.16.0.12")
+				n.ApplyLoopbackDSRPolicy(&ip)
+				n.ApplyLoopbackDSRPolicy(&ip)
 
-				// it should be unchanged!
+				// only one policy
 				addlArgs := n.Policies
 				Expect(addlArgs).Should(HaveLen(1))
 
+				// normal type judgement
 				policy := addlArgs[0]
 				Expect(policy.Name).Should(Equal("EndpointPolicy"))
-
+				value := make(map[string]interface{})
-				var value map[string]interface{}
 				json.Unmarshal(policy.Value, &value)
-
 				Expect(value).Should(HaveKey("Type"))
-				Expect(value).Should(HaveKey("ExceptionList"))
 				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Settings"))
 
+				// and only one item
+				settings := value["Settings"].(map[string]interface{})
+				destinationList := settings["Destinations"].([]interface{})
+				Expect(destinationList).Should(HaveLen(1))
+				Expect(destinationList[0].(string)).Should(Equal("172.16.0.12"))
+			})
+
+			It("append different IP", func() {
+				// mock different IP
+				ip1 := net.ParseIP("172.16.0.12")
+				n.ApplyLoopbackDSRPolicy(&ip1)
+				ip2 := net.ParseIP("172.16.0.13")
+				n.ApplyLoopbackDSRPolicy(&ip2)
+
+				// will be two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[1] // pick second item
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Settings"))
+
+				// only one item
+				settings := value["Settings"].(map[string]interface{})
+				destinationList := settings["Destinations"].([]interface{})
+				Expect(destinationList).Should(HaveLen(1))
+				Expect(destinationList[0].(string)).Should(Equal("172.16.0.13"))
+			})
+		})
+	})
+
+	Describe("ApplyOutBoundNATPolicy", func() {
+		Context("via v1 api", func() {
+			var n NetConf
+			BeforeEach(func() {
+				n = NetConf{}
+			})
+
+			It("append different IP", func() {
+				// mock different IP
+				n.ApplyOutboundNatPolicy("192.168.0.0/16")
+				n.ApplyOutboundNatPolicy("10.244.0.0/16")
+
+				// will be two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[1] // pick second item
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("ExceptionList"))
+
+				// but get two items
 				exceptionList := value["ExceptionList"].([]interface{})
-				Expect(exceptionList).Should(HaveLen(2))
+				Expect(exceptionList).Should(HaveLen(1))
-				Expect(exceptionList[0].(string)).Should(Equal("192.168.0.0/16"))
+				Expect(exceptionList[0].(string)).Should(Equal("10.244.0.0/16"))
-				Expect(exceptionList[1].(string)).Should(Equal("10.244.0.0/16"))
+			})
+
+			It("append a new one if there is not an exception OutBoundNAT policy", func() {
+				// mock different OutBoundNAT routes
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: bprintf(`{"Type": "OutBoundNAT", "OtherList": []}`),
+					},
+				}
+				n.ApplyOutboundNatPolicy("10.244.0.0/16")
+
+				// has two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[0]
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("OtherList"))
+				policy = addlArgs[1]
+				value = make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("ExceptionList"))
+
+				// only get one item
+				exceptionList := value["ExceptionList"].([]interface{})
+				Expect(exceptionList).Should(HaveLen(1))
+				Expect(exceptionList[0].(string)).Should(Equal("10.244.0.0/16"))
+			})
+
+			It("nothing to do if CIDR is blank", func() {
+				// mock different OutBoundNAT routes
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: bprintf(`{"Type": "OutBoundNAT", "ExceptionList": []}`),
+					},
+				}
+				n.ApplyOutboundNatPolicy("")
+
+				// only one policy
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(1))
+
+				// normal type judgement
+				policy := addlArgs[0]
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("ExceptionList"))
+
+				// empty list
+				Expect(value["ExceptionList"]).ShouldNot(BeNil())
+				Expect(value["ExceptionList"]).Should(HaveLen(0))
+			})
+		})
+
+		Context("via v2 api", func() {
+			var n NetConf
+			BeforeEach(func() {
+				n = NetConf{ApiVersion: 2}
+			})
+
+			It("append different IP", func() {
+				// mock different IP
+				n.ApplyOutboundNatPolicy("192.168.0.0/16")
+				n.ApplyOutboundNatPolicy("10.244.0.0/16")
+
+				// will be two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[1] // pick second item
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Settings"))
+
+				// but get two items
+				settings := value["Settings"].(map[string]interface{})
+				exceptionList := settings["Exceptions"].([]interface{})
+				Expect(exceptionList).Should(HaveLen(1))
+				Expect(exceptionList[0].(string)).Should(Equal("10.244.0.0/16"))
+			})
+
+			It("append a new one if there is not an exception OutBoundNAT policy", func() {
+				// mock different OutBoundNAT routes
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: bprintf(`{"Type": "OutBoundNAT", "Settings": {"Others": []}}`),
+					},
+				}
+				n.ApplyOutboundNatPolicy("10.244.0.0/16")
+
+				// has two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[0]
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Settings"))
+				Expect(value["Settings"]).Should(HaveKey("Others"))
+				policy = addlArgs[1]
+				value = make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Settings"))
+
+				// only get one item
+				settings := value["Settings"].(map[string]interface{})
+				exceptionList := settings["Exceptions"].([]interface{})
+				Expect(exceptionList).Should(HaveLen(1))
+				Expect(exceptionList[0].(string)).Should(Equal("10.244.0.0/16"))
+			})
+
+			It("nothing to do if CIDR is blank", func() {
+				// mock different OutBoundNAT routes
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: bprintf(`{"Type": "OutBoundNAT", "Settings": {"Exceptions": []}}`),
+					},
+				}
+				n.ApplyOutboundNatPolicy("")
+
+				// only one policy
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(1))
+
+				// normal type judgement
+				policy := addlArgs[0]
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
+				Expect(value).Should(HaveKey("Settings"))
+
+				// empty list
+				settings := value["Settings"].(map[string]interface{})
+				Expect(settings["Exceptions"]).ShouldNot(BeNil())
+				Expect(settings["Exceptions"]).Should(HaveLen(0))
 			})
 		})
 	})
 
 	Describe("ApplyDefaultPAPolicy", func() {
-		Context("when not set by user", func() {
+		Context("via v1 api", func() {
-			It("sets it by adding a policy", func() {
+			var n NetConf
-
+			BeforeEach(func() {
-				n := NetConf{}
+				n = NetConf{}
-				n.ApplyDefaultPAPolicy("192.168.0.1")
-
-				addlArgs := n.Policies
-				Expect(addlArgs).Should(HaveLen(1))
-
-				policy := addlArgs[0]
-				Expect(policy.Name).Should(Equal("EndpointPolicy"))
-
-				value := make(map[string]interface{})
-				json.Unmarshal(policy.Value, &value)
-
-				Expect(value).Should(HaveKey("Type"))
-				Expect(value["Type"]).Should(Equal("PA"))
-
-				paAddress := value["PA"].(string)
-				Expect(paAddress).Should(Equal("192.168.0.1"))
-			})
 			})
 
-		Context("when set by user", func() {
+			It("append different IP", func() {
-			It("does not override", func() {
+				// mock different IP
-				n := NetConf{}
 				n.ApplyDefaultPAPolicy("192.168.0.1")
 				n.ApplyDefaultPAPolicy("192.168.0.2")
 
+				// will be two policies
 				addlArgs := n.Policies
-				Expect(addlArgs).Should(HaveLen(1))
+				Expect(addlArgs).Should(HaveLen(2))
 
-				policy := addlArgs[0]
+				// normal type judgement
+				policy := addlArgs[1] // judge second item
 				Expect(policy.Name).Should(Equal("EndpointPolicy"))
-
 				value := make(map[string]interface{})
 				json.Unmarshal(policy.Value, &value)
-
 				Expect(value).Should(HaveKey("Type"))
 				Expect(value["Type"]).Should(Equal("PA"))
 
+				// compare with second item
 				paAddress := value["PA"].(string)
-				Expect(paAddress).Should(Equal("192.168.0.1"))
+				Expect(paAddress).Should(Equal("192.168.0.2"))
-				Expect(paAddress).ShouldNot(Equal("192.168.0.2"))
+			})
+
+			It("nothing to do if IP is blank", func() {
+				// mock different policy
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: bprintf(`{"Type": "OutBoundNAT", "Exceptions": ["192.168.0.0/16"]}`),
+					},
+				}
+				n.ApplyDefaultPAPolicy("")
+
+				// nothing
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(1))
+			})
+		})
+
+		Context("via v2 api", func() {
+			var n NetConf
+			BeforeEach(func() {
+				n = NetConf{ApiVersion: 2}
+			})
+
+			It("append different IP", func() {
+				// mock different IP
+				n.ApplyDefaultPAPolicy("192.168.0.1")
+				n.ApplyDefaultPAPolicy("192.168.0.2")
+
+				// will be two policies
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(2))
+
+				// normal type judgement
+				policy := addlArgs[1] // judge second item
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("ProviderAddress"))
+				Expect(value).Should(HaveKey("Settings"))
+
+				// compare with second item
+				settings := value["Settings"].(map[string]interface{})
+				paAddress := settings["ProviderAddress"].(string)
+				Expect(paAddress).Should(Equal("192.168.0.2"))
+			})
+
+			It("nothing to do if IP is blank", func() {
+				// mock different policy
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: bprintf(`{"Type": "OutBoundNAT", "Settings": {"Exceptions": ["192.168.0.0/16"]}}`),
+					},
+				}
+				n.ApplyDefaultPAPolicy("")
+
+				// nothing
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(1))
 			})
 		})
 	})
 
 	Describe("ApplyPortMappingPolicy", func() {
-		Context("when portMappings not activated", func() {
+		Context("via v1 api", func() {
-			It("does nothing", func() {
+			var n NetConf
-				n := NetConf{}
+			BeforeEach(func() {
+				n = NetConf{}
+			})
+
+			It("nothing to do if input is empty", func() {
 				n.ApplyPortMappingPolicy(nil)
 				Expect(n.Policies).Should(BeNil())
 
 				n.ApplyPortMappingPolicy([]PortMapEntry{})
-				Expect(n.Policies).Should(HaveLen(0))
+				Expect(n.Policies).Should(BeNil())
-			})
 			})
 
-		Context("when portMappings is activated", func() {
+			It("create one NAT policy", func() {
-			It("creates NAT policies", func() {
+				// mock different IP
-				n := NetConf{}
 				n.ApplyPortMappingPolicy([]PortMapEntry{
 					{
 						ContainerPort: 80,
 						HostPort:      8080,
 						Protocol:      "TCP",
-						HostIP:        "ignored",
+						HostIP:        "192.168.1.2",
 					},
 				})
 
-				Expect(n.Policies).Should(HaveLen(1))
+				// only one item
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(1))
 
-				policy := n.Policies[0]
+				// normal type judgement
+				policy := addlArgs[0]
 				Expect(policy.Name).Should(Equal("EndpointPolicy"))
-
 				value := make(map[string]interface{})
 				json.Unmarshal(policy.Value, &value)
-
 				Expect(value).Should(HaveKey("Type"))
 				Expect(value["Type"]).Should(Equal("NAT"))
 
+				// compare all values
 				Expect(value).Should(HaveKey("InternalPort"))
 				Expect(value["InternalPort"]).Should(Equal(float64(80)))
-
 				Expect(value).Should(HaveKey("ExternalPort"))
 				Expect(value["ExternalPort"]).Should(Equal(float64(8080)))
-
 				Expect(value).Should(HaveKey("Protocol"))
 				Expect(value["Protocol"]).Should(Equal("TCP"))
 			})
 		})
+
+		Context("via v2 api", func() {
+			var n NetConf
+			BeforeEach(func() {
+				n = NetConf{ApiVersion: 2}
 			})
 
-	Describe("MarshalPolicies", func() {
+			It("nothing to do if input is empty", func() {
-		Context("when not set by user", func() {
+				n.ApplyPortMappingPolicy(nil)
-			It("sets it by adding a policy", func() {
+				Expect(n.Policies).Should(BeNil())
 
-				n := NetConf{
+				n.ApplyPortMappingPolicy([]PortMapEntry{})
-					Policies: []policy{
+				Expect(n.Policies).Should(BeNil())
+			})
+
+			It("creates one NAT policy", func() {
+				// mock different IP
+				n.ApplyPortMappingPolicy([]PortMapEntry{
+					{
+						ContainerPort: 80,
+						HostPort:      8080,
+						Protocol:      "TCP",
+						HostIP:        "192.168.1.2",
+					},
+				})
+
+				// only one item
+				addlArgs := n.Policies
+				Expect(addlArgs).Should(HaveLen(1))
+
+				// normal type judgement
+				policy := addlArgs[0]
+				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				value := make(map[string]interface{})
+				json.Unmarshal(policy.Value, &value)
+				Expect(value).Should(HaveKey("Type"))
+				Expect(value["Type"]).Should(Equal("PortMapping"))
+				Expect(value).Should(HaveKey("Settings"))
+
+				// compare all values
+				settings := value["Settings"].(map[string]interface{})
+				Expect(settings).Should(HaveKey("InternalPort"))
+				Expect(settings["InternalPort"]).Should(Equal(float64(80)))
+				Expect(settings).Should(HaveKey("ExternalPort"))
+				Expect(settings["ExternalPort"]).Should(Equal(float64(8080)))
+				Expect(settings).Should(HaveKey("Protocol"))
+				Expect(settings["Protocol"]).Should(Equal(float64(6)))
+				Expect(settings).Should(HaveKey("VIP"))
+				Expect(settings["VIP"]).Should(Equal("192.168.1.2"))
+			})
+		})
+	})
+
+	Describe("GetXEndpointPolicies", func() {
+		Context("via v1 api", func() {
+			var n NetConf
+			BeforeEach(func() {
+				n = NetConf{}
+			})
+
+			It("GetHNSEndpointPolicies", func() {
+				// mock different policies
+				n.Policies = []Policy{
 					{
 						Name:  "EndpointPolicy",
-							Value: []byte(`{"someKey": "someValue"}`),
+						Value: []byte(`{"Type": "OutBoundNAT", "ExceptionList": [ "192.168.1.2" ]}`),
 					},
 					{
 						Name:  "someOtherType",
 						Value: []byte(`{"someOtherKey": "someOtherValue"}`),
 					},
-					},
 				}
 
-				result := n.MarshalPolicies()
+				// only one valid item
+				result := n.GetHNSEndpointPolicies()
 				Expect(len(result)).To(Equal(1))
 
+				// normal type judgement
 				policy := make(map[string]interface{})
 				err := json.Unmarshal(result[0], &policy)
 				Expect(err).ToNot(HaveOccurred())
-				Expect(policy).Should(HaveKey("someKey"))
+				Expect(policy).Should(HaveKey("Type"))
-				Expect(policy["someKey"]).To(Equal("someValue"))
+				Expect(policy["Type"]).To(Equal("OutBoundNAT"))
+				Expect(policy).Should(HaveKey("ExceptionList"))
+				Expect(policy["ExceptionList"]).To(ContainElement("192.168.1.2"))
 			})
 		})
 
-		Context("when set by user", func() {
+		Context("via v2 api", func() {
-			It("appends exceptions to the existing policy", func() {
+			var n NetConf
-				// first set it
+			BeforeEach(func() {
-				n := NetConf{}
+				n = NetConf{ApiVersion: 2}
-				n.ApplyOutboundNatPolicy("192.168.0.0/16")
+			})
 
-				// then attempt to update it
+			It("GetHostComputeEndpointPolicies", func() {
-				n.ApplyOutboundNatPolicy("10.244.0.0/16")
+				// mock different policies
+				n.Policies = []Policy{
+					{
+						Name:  "EndpointPolicy",
+						Value: []byte(`{"Type": "OutBoundNAT", "Settings": {"Exceptions": [ "192.168.1.2" ]}}`),
+					},
+					{
+						Name:  "someOtherType",
+						Value: []byte(`{"someOtherKey": "someOtherValue"}`),
+					},
+				}
 
-				// it should be unchanged!
+				// only one valid item
-				addlArgs := n.Policies
+				result := n.GetHostComputeEndpointPolicies()
-				Expect(addlArgs).Should(HaveLen(1))
+				Expect(len(result)).To(Equal(1))
 
-				policy := addlArgs[0]
+				// normal type judgement
-				Expect(policy.Name).Should(Equal("EndpointPolicy"))
+				policy := result[0]
-
+				Expect(policy.Type).Should(Equal(hcn.OutBoundNAT))
-				var value map[string]interface{}
+				settings := make(map[string]interface{})
-				json.Unmarshal(policy.Value, &value)
+				err := json.Unmarshal(policy.Settings, &settings)
-
+				Expect(err).ToNot(HaveOccurred())
-				Expect(value).Should(HaveKey("Type"))
+				Expect(settings["Exceptions"]).To(ContainElement("192.168.1.2"))
-				Expect(value).Should(HaveKey("ExceptionList"))
-				Expect(value["Type"]).Should(Equal("OutBoundNAT"))
-
-				exceptionList := value["ExceptionList"].([]interface{})
-				Expect(exceptionList).Should(HaveLen(2))
-				Expect(exceptionList[0].(string)).Should(Equal("192.168.0.0/16"))
-				Expect(exceptionList[1].(string)).Should(Equal("10.244.0.0/16"))
 			})
 		})
 	})

pkg/ip/link_linux.go

@@ -25,7 +25,6 @@ import (
 	"github.com/vishvananda/netlink"
 
 	"github.com/containernetworking/plugins/pkg/ns"
-	"github.com/containernetworking/plugins/pkg/utils/hwaddr"
 	"github.com/containernetworking/plugins/pkg/utils/sysctl"
 )
 
@@ -33,19 +32,27 @@ var (
 	ErrLinkNotFound = errors.New("link not found")
 )
 
-func makeVethPair(name, peer string, mtu int) (netlink.Link, error) {
+// makeVethPair is called from within the container's network namespace
+func makeVethPair(name, peer string, mtu int, mac string, hostNS ns.NetNS) (netlink.Link, error) {
 	veth := &netlink.Veth{
 		LinkAttrs: netlink.LinkAttrs{
 			Name: name,
-			Flags: net.FlagUp,
 			MTU:  mtu,
 		},
 		PeerName:      peer,
+		PeerNamespace: netlink.NsFd(int(hostNS.Fd())),
+	}
+	if mac != "" {
+		m, err := net.ParseMAC(mac)
+		if err != nil {
+			return nil, err
+		}
+		veth.LinkAttrs.HardwareAddr = m
 	}
 	if err := netlink.LinkAdd(veth); err != nil {
 		return nil, err
 	}
-	// Re-fetch the link to get its creation-time parameters, e.g. index and mac
+	// Re-fetch the container link to get its creation-time parameters, e.g. index and mac
 	veth2, err := netlink.LinkByName(name)
 	if err != nil {
 		netlink.LinkDel(veth) // try and clean up the link if possible.
@@ -62,7 +69,7 @@ func peerExists(name string) bool {
 	return true
 }
 
-func makeVeth(name, vethPeerName string, mtu int) (peerName string, veth netlink.Link, err error) {
+func makeVeth(name, vethPeerName string, mtu int, mac string, hostNS ns.NetNS) (peerName string, veth netlink.Link, err error) {
 	for i := 0; i < 10; i++ {
 		if vethPeerName != "" {
 			peerName = vethPeerName
@@ -73,7 +80,7 @@ func makeVeth(name, vethPeerName string, mtu int) (peerName string, veth netlink
 			}
 		}
 
-		veth, err = makeVethPair(name, peerName, mtu)
+		veth, err = makeVethPair(name, peerName, mtu, mac, hostNS)
 		switch {
 		case err == nil:
 			return
@@ -99,7 +106,7 @@ func makeVeth(name, vethPeerName string, mtu int) (peerName string, veth netlink
 // RandomVethName returns string "veth" with random prefix (hashed from entropy)
 func RandomVethName() (string, error) {
 	entropy := make([]byte, 4)
-	_, err := rand.Reader.Read(entropy)
+	_, err := rand.Read(entropy)
 	if err != nil {
 		return "", fmt.Errorf("failed to generate random veth name: %v", err)
 	}
@@ -132,25 +139,13 @@ func ifaceFromNetlinkLink(l netlink.Link) net.Interface {
 // devices and move the host-side veth into the provided hostNS namespace.
 // hostVethName: If hostVethName is not specified, the host-side veth name will use a random string.
 // On success, SetupVethWithName returns (hostVeth, containerVeth, nil)
-func SetupVethWithName(contVethName, hostVethName string, mtu int, hostNS ns.NetNS) (net.Interface, net.Interface, error) {
+func SetupVethWithName(contVethName, hostVethName string, mtu int, contVethMac string, hostNS ns.NetNS) (net.Interface, net.Interface, error) {
-	hostVethName, contVeth, err := makeVeth(contVethName, hostVethName, mtu)
+	hostVethName, contVeth, err := makeVeth(contVethName, hostVethName, mtu, contVethMac, hostNS)
 	if err != nil {
 		return net.Interface{}, net.Interface{}, err
 	}
 
-	if err = netlink.LinkSetUp(contVeth); err != nil {
+	var hostVeth netlink.Link
-		return net.Interface{}, net.Interface{}, fmt.Errorf("failed to set %q up: %v", contVethName, err)
-	}
-
-	hostVeth, err := netlink.LinkByName(hostVethName)
-	if err != nil {
-		return net.Interface{}, net.Interface{}, fmt.Errorf("failed to lookup %q: %v", hostVethName, err)
-	}
-
-	if err = netlink.LinkSetNsFd(hostVeth, int(hostNS.Fd())); err != nil {
-		return net.Interface{}, net.Interface{}, fmt.Errorf("failed to move veth to host netns: %v", err)
-	}
-
 	err = hostNS.Do(func(_ ns.NetNS) error {
 		hostVeth, err = netlink.LinkByName(hostVethName)
 		if err != nil {
@@ -175,8 +170,8 @@ func SetupVethWithName(contVethName, hostVethName string, mtu int, hostNS ns.Net
 // Call SetupVeth from inside the container netns.  It will create both veth
 // devices and move the host-side veth into the provided hostNS namespace.
 // On success, SetupVeth returns (hostVeth, containerVeth, nil)
-func SetupVeth(contVethName string, mtu int, hostNS ns.NetNS) (net.Interface, net.Interface, error) {
+func SetupVeth(contVethName string, mtu int, contVethMac string, hostNS ns.NetNS) (net.Interface, net.Interface, error) {
-	return SetupVethWithName(contVethName, "", mtu, hostNS)
+	return SetupVethWithName(contVethName, "", mtu, contVethMac, hostNS)
 }
 
 // DelLinkByName removes an interface link.
@@ -225,33 +220,6 @@ func DelLinkByNameAddr(ifName string) ([]*net.IPNet, error) {
 	return out, nil
 }
 
-func SetHWAddrByIP(ifName string, ip4 net.IP, ip6 net.IP) error {
-	iface, err := netlink.LinkByName(ifName)
-	if err != nil {
-		return fmt.Errorf("failed to lookup %q: %v", ifName, err)
-	}
-
-	switch {
-	case ip4 == nil && ip6 == nil:
-		return fmt.Errorf("neither ip4 or ip6 specified")
-
-	case ip4 != nil:
-		{
-			hwAddr, err := hwaddr.GenerateHardwareAddr4(ip4, hwaddr.PrivateMACPrefix)
-			if err != nil {
-				return fmt.Errorf("failed to generate hardware addr: %v", err)
-			}
-			if err = netlink.LinkSetHardwareAddr(iface, hwAddr); err != nil {
-				return fmt.Errorf("failed to add hardware addr to %q: %v", ifName, err)
-			}
-		}
-	case ip6 != nil:
-		// TODO: IPv6
-	}
-
-	return nil
-}
-
 // GetVethPeerIfindex returns the veth link object, the peer ifindex of the
 // veth, or an error. This peer ifindex will only be valid in the peer's
 // network namespace.

pkg/ip/link_linux_test.go

@@ -51,8 +51,6 @@ var _ = Describe("Link", func() {
 		hostVethName      string
 		containerVethName string
 
-		ip4one             = net.ParseIP("1.1.1.1")
-		ip4two             = net.ParseIP("1.1.1.2")
 		originalRandReader = rand.Reader
 	)
 
@@ -72,7 +70,7 @@ var _ = Describe("Link", func() {
 		_ = containerNetNS.Do(func(ns.NetNS) error {
 			defer GinkgoRecover()
 
-			hostVeth, containerVeth, err = ip.SetupVeth(fmt.Sprintf(ifaceFormatString, ifaceCounter), mtu, hostNetNS)
+			hostVeth, containerVeth, err = ip.SetupVeth(fmt.Sprintf(ifaceFormatString, ifaceCounter), mtu, "", hostNetNS)
 			if err != nil {
 				return err
 			}
@@ -159,7 +157,7 @@ var _ = Describe("Link", func() {
 			_ = containerNetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 
-				_, _, err := ip.SetupVeth(containerVethName, mtu, hostNetNS)
+				_, _, err := ip.SetupVeth(containerVethName, mtu, "", hostNetNS)
 				Expect(err.Error()).To(Equal(fmt.Sprintf("container veth name provided (%s) already exists", containerVethName)))
 
 				return nil
@@ -189,9 +187,9 @@ var _ = Describe("Link", func() {
 		It("returns useful error", func() {
 			_ = containerNetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
-				_, _, err := ip.SetupVeth(containerVethName, mtu, hostNetNS)
+				_, _, err := ip.SetupVeth(containerVethName, mtu, "", hostNetNS)
-				Expect(err.Error()).To(HavePrefix("failed to move veth to host netns: "))
+				Expect(err.Error()).To(HavePrefix("container veth name provided"))
-
+				Expect(err.Error()).To(HaveSuffix("already exists"))
 				return nil
 			})
 		})
@@ -207,7 +205,7 @@ var _ = Describe("Link", func() {
 			_ = containerNetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 
-				hostVeth, _, err := ip.SetupVeth(containerVethName, mtu, hostNetNS)
+				hostVeth, _, err := ip.SetupVeth(containerVethName, mtu, "", hostNetNS)
 				Expect(err).NotTo(HaveOccurred())
 				hostVethName = hostVeth.Name
 				return nil
@@ -233,6 +231,32 @@ var _ = Describe("Link", func() {
 			})
 		})
 
+		It("successfully creates a veth pair with an explicit mac", func() {
+			const mac = "02:00:00:00:01:23"
+			_ = containerNetNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				hostVeth, _, err := ip.SetupVeth(containerVethName, mtu, mac, hostNetNS)
+				Expect(err).NotTo(HaveOccurred())
+				hostVethName = hostVeth.Name
+
+				link, err := netlink.LinkByName(containerVethName)
+				Expect(err).NotTo(HaveOccurred())
+				Expect(link.Attrs().HardwareAddr.String()).To(Equal(mac))
+
+				return nil
+			})
+
+			_ = hostNetNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				link, err := netlink.LinkByName(hostVethName)
+				Expect(err).NotTo(HaveOccurred())
+				Expect(link.Attrs().HardwareAddr.String()).NotTo(Equal(mac))
+
+				return nil
+			})
+		})
 	})
 
 	It("DelLinkByName must delete the veth endpoints", func() {
@@ -270,41 +294,4 @@ var _ = Describe("Link", func() {
 			return nil
 		})
 	})
-
-	It("SetHWAddrByIP must change the interface hwaddr and be predictable", func() {
-
-		_ = containerNetNS.Do(func(ns.NetNS) error {
-			defer GinkgoRecover()
-
-			var err error
-			hwaddrBefore := getHwAddr(containerVethName)
-
-			err = ip.SetHWAddrByIP(containerVethName, ip4one, nil)
-			Expect(err).NotTo(HaveOccurred())
-			hwaddrAfter1 := getHwAddr(containerVethName)
-
-			Expect(hwaddrBefore).NotTo(Equal(hwaddrAfter1))
-			Expect(hwaddrAfter1).To(Equal(ip4onehwaddr))
-
-			return nil
-		})
-	})
-
-	It("SetHWAddrByIP must be injective", func() {
-
-		_ = containerNetNS.Do(func(ns.NetNS) error {
-			defer GinkgoRecover()
-
-			err := ip.SetHWAddrByIP(containerVethName, ip4one, nil)
-			Expect(err).NotTo(HaveOccurred())
-			hwaddrAfter1 := getHwAddr(containerVethName)
-
-			err = ip.SetHWAddrByIP(containerVethName, ip4two, nil)
-			Expect(err).NotTo(HaveOccurred())
-			hwaddrAfter2 := getHwAddr(containerVethName)
-
-			Expect(hwaddrAfter1).NotTo(Equal(hwaddrAfter2))
-			return nil
-		})
-	})
 })

pkg/ip/utils_linux.go

@@ -1,3 +1,4 @@
+//go:build linux
 // +build linux
 
 // Copyright 2016 CNI authors

pkg/ipam/ipam_linux.go

@@ -43,10 +43,6 @@ func ConfigureIface(ifName string, res *current.Result) error {
 		return fmt.Errorf("failed to lookup %q: %v", ifName, err)
 	}
 
-	if err := netlink.LinkSetUp(link); err != nil {
-		return fmt.Errorf("failed to set %q UP: %v", ifName, err)
-	}
-
 	var v4gw, v6gw net.IP
 	var has_enabled_ipv6 bool = false
 	for _, ipc := range res.IPs {
@@ -99,6 +95,10 @@ func ConfigureIface(ifName string, res *current.Result) error {
 		}
 	}
 
+	if err := netlink.LinkSetUp(link); err != nil {
+		return fmt.Errorf("failed to set %q UP: %v", ifName, err)
+	}
+
 	if v6gw != nil {
 		ip.SettleAddresses(ifName, 10)
 	}

pkg/link/link_suite_test.go

@@ -1,4 +1,4 @@
-// Copyright 2015 CNI authors
+// Copyright 2021 CNI authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,16 +11,17 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-package main
+
+package link_test
 
 import (
+	"testing"
+
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
-
-	"testing"
 )
 
-func TestFlannel(t *testing.T) {
+func TestIp(t *testing.T) {
 	RegisterFailHandler(Fail)
-	RunSpecs(t, "plugins/meta/flannel")
+	RunSpecs(t, "pkg/link")
 }

pkg/link/spoofcheck.go

@@ -0,0 +1,245 @@
+// Copyright 2021 CNI authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package link
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/networkplumbing/go-nft/nft"
+	"github.com/networkplumbing/go-nft/nft/schema"
+)
+
+const (
+	natTableName            = "nat"
+	preRoutingBaseChainName = "PREROUTING"
+)
+
+type NftConfigurer interface {
+	Apply(*nft.Config) error
+	Read() (*nft.Config, error)
+}
+
+type SpoofChecker struct {
+	iface      string
+	macAddress string
+	refID      string
+	configurer NftConfigurer
+}
+
+type defaultNftConfigurer struct{}
+
+func (_ defaultNftConfigurer) Apply(cfg *nft.Config) error {
+	return nft.ApplyConfig(cfg)
+}
+
+func (_ defaultNftConfigurer) Read() (*nft.Config, error) {
+	return nft.ReadConfig()
+}
+
+func NewSpoofChecker(iface, macAddress, refID string) *SpoofChecker {
+	return NewSpoofCheckerWithConfigurer(iface, macAddress, refID, defaultNftConfigurer{})
+}
+
+func NewSpoofCheckerWithConfigurer(iface, macAddress, refID string, configurer NftConfigurer) *SpoofChecker {
+	return &SpoofChecker{iface, macAddress, refID, configurer}
+}
+
+// Setup applies nftables configuration to restrict traffic
+// from the provided interface. Only traffic with the mentioned mac address
+// is allowed to pass, all others are blocked.
+// The configuration follows the format libvirt and ebtables implemented, allowing
+// extensions to the rules in the future.
+// refID is used to label the rules with a unique comment, identifying the rule-set.
+//
+// In order to take advantage of the nftables configuration change atomicity, the
+// following steps are taken to apply the configuration:
+// - Declare the table and chains (they will be created in case not present).
+// - Apply the rules, while first flushing the iface/mac specific regular chain rules.
+// Two transactions are used because the flush succeeds only if the table/chain it targets
+// exists. This avoids the need to query the existing state and acting upon it (a raceful pattern).
+// Although two transactions are taken place, only the 2nd one where the rules
+// are added has a real impact on the system.
+func (sc *SpoofChecker) Setup() error {
+	baseConfig := nft.NewConfig()
+
+	baseConfig.AddTable(&schema.Table{Family: schema.FamilyBridge, Name: natTableName})
+
+	baseConfig.AddChain(sc.baseChain())
+	ifaceChain := sc.ifaceChain()
+	baseConfig.AddChain(ifaceChain)
+	macChain := sc.macChain(ifaceChain.Name)
+	baseConfig.AddChain(macChain)
+
+	if err := sc.configurer.Apply(baseConfig); err != nil {
+		return fmt.Errorf("failed to setup spoof-check: %v", err)
+	}
+
+	rulesConfig := nft.NewConfig()
+
+	rulesConfig.FlushChain(ifaceChain)
+	rulesConfig.FlushChain(macChain)
+
+	rulesConfig.AddRule(sc.matchIfaceJumpToChainRule(preRoutingBaseChainName, ifaceChain.Name))
+	rulesConfig.AddRule(sc.jumpToChainRule(ifaceChain.Name, macChain.Name))
+	rulesConfig.AddRule(sc.matchMacRule(macChain.Name))
+	rulesConfig.AddRule(sc.dropRule(macChain.Name))
+
+	if err := sc.configurer.Apply(rulesConfig); err != nil {
+		return fmt.Errorf("failed to setup spoof-check: %v", err)
+	}
+
+	return nil
+}
+
+// Teardown removes the interface and mac-address specific chains and their rules.
+// The table and base-chain are expected to survive while the base-chain rule that matches the
+// interface is removed.
+func (sc *SpoofChecker) Teardown() error {
+	ifaceChain := sc.ifaceChain()
+	currentConfig, ifaceMatchRuleErr := sc.configurer.Read()
+	if ifaceMatchRuleErr == nil {
+		expectedRuleToFind := sc.matchIfaceJumpToChainRule(preRoutingBaseChainName, ifaceChain.Name)
+		// It is safer to exclude the statement matching, avoiding cases where a current statement includes
+		// additional default entries (e.g. counters).
+		ruleToFindExcludingStatements := *expectedRuleToFind
+		ruleToFindExcludingStatements.Expr = nil
+		rules := currentConfig.LookupRule(&ruleToFindExcludingStatements)
+		if len(rules) > 0 {
+			c := nft.NewConfig()
+			for _, rule := range rules {
+				c.DeleteRule(rule)
+			}
+			if err := sc.configurer.Apply(c); err != nil {
+				ifaceMatchRuleErr = fmt.Errorf("failed to delete iface match rule: %v", err)
+			}
+		} else {
+			fmt.Fprintf(os.Stderr, "spoofcheck/teardown: unable to detect iface match rule for deletion: %+v", expectedRuleToFind)
+		}
+	}
+
+	regularChainsConfig := nft.NewConfig()
+	regularChainsConfig.DeleteChain(ifaceChain)
+	regularChainsConfig.DeleteChain(sc.macChain(ifaceChain.Name))
+
+	var regularChainsErr error
+	if err := sc.configurer.Apply(regularChainsConfig); err != nil {
+		regularChainsErr = fmt.Errorf("failed to delete regular chains: %v", err)
+	}
+
+	if ifaceMatchRuleErr != nil || regularChainsErr != nil {
+		return fmt.Errorf("failed to teardown spoof-check: %v, %v", ifaceMatchRuleErr, regularChainsErr)
+	}
+	return nil
+}
+
+func (sc *SpoofChecker) matchIfaceJumpToChainRule(chain, toChain string) *schema.Rule {
+	return &schema.Rule{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Chain:  chain,
+		Expr: []schema.Statement{
+			{Match: &schema.Match{
+				Op:    schema.OperEQ,
+				Left:  schema.Expression{RowData: []byte(`{"meta":{"key":"iifname"}}`)},
+				Right: schema.Expression{String: &sc.iface},
+			}},
+			{Verdict: schema.Verdict{Jump: &schema.ToTarget{Target: toChain}}},
+		},
+		Comment: ruleComment(sc.refID),
+	}
+}
+
+func (sc *SpoofChecker) jumpToChainRule(chain, toChain string) *schema.Rule {
+	return &schema.Rule{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Chain:  chain,
+		Expr: []schema.Statement{
+			{Verdict: schema.Verdict{Jump: &schema.ToTarget{Target: toChain}}},
+		},
+		Comment: ruleComment(sc.refID),
+	}
+}
+
+func (sc *SpoofChecker) matchMacRule(chain string) *schema.Rule {
+	return &schema.Rule{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Chain:  chain,
+		Expr: []schema.Statement{
+			{Match: &schema.Match{
+				Op: schema.OperEQ,
+				Left: schema.Expression{Payload: &schema.Payload{
+					Protocol: schema.PayloadProtocolEther,
+					Field:    schema.PayloadFieldEtherSAddr,
+				}},
+				Right: schema.Expression{String: &sc.macAddress},
+			}},
+			{Verdict: schema.Verdict{SimpleVerdict: schema.SimpleVerdict{Return: true}}},
+		},
+		Comment: ruleComment(sc.refID),
+	}
+}
+
+func (sc *SpoofChecker) dropRule(chain string) *schema.Rule {
+	macRulesIndex := nft.NewRuleIndex()
+	return &schema.Rule{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Chain:  chain,
+		Index:  macRulesIndex.Next(),
+		Expr: []schema.Statement{
+			{Verdict: schema.Verdict{SimpleVerdict: schema.SimpleVerdict{Drop: true}}},
+		},
+		Comment: ruleComment(sc.refID),
+	}
+}
+
+func (_ *SpoofChecker) baseChain() *schema.Chain {
+	chainPriority := -300
+	return &schema.Chain{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Name:   preRoutingBaseChainName,
+		Type:   schema.TypeFilter,
+		Hook:   schema.HookPreRouting,
+		Prio:   &chainPriority,
+		Policy: schema.PolicyAccept,
+	}
+}
+
+func (sc *SpoofChecker) ifaceChain() *schema.Chain {
+	ifaceChainName := "cni-br-iface-" + sc.refID
+	return &schema.Chain{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Name:   ifaceChainName,
+	}
+}
+
+func (_ *SpoofChecker) macChain(ifaceChainName string) *schema.Chain {
+	macChainName := ifaceChainName + "-mac"
+	return &schema.Chain{
+		Family: schema.FamilyBridge,
+		Table:  natTableName,
+		Name:   macChainName,
+	}
+}
+
+func ruleComment(id string) string {
+	const refIDPrefix = "macspoofchk-"
+	return refIDPrefix + id
+}

pkg/link/spoofcheck_test.go

@@ -0,0 +1,297 @@
+// Copyright 2021 CNI authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package link_test
+
+import (
+	"fmt"
+	"github.com/networkplumbing/go-nft/nft"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"github.com/containernetworking/plugins/pkg/link"
+)
+
+var _ = Describe("spoofcheck", func() {
+	iface := "net0"
+	mac := "02:00:00:00:12:34"
+	id := "container99-net1"
+
+	Context("setup", func() {
+		It("succeeds", func() {
+			c := configurerStub{}
+			sc := link.NewSpoofCheckerWithConfigurer(iface, mac, id, &c)
+			Expect(sc.Setup()).To(Succeed())
+
+			assertExpectedTableAndChainsInSetupConfig(c)
+			assertExpectedRulesInSetupConfig(c)
+		})
+
+		It("fails to setup config when 1st apply is unsuccessful (declare table and chains)", func() {
+			c := &configurerStub{failFirstApplyConfig: true}
+			sc := link.NewSpoofCheckerWithConfigurer(iface, mac, id, c)
+			Expect(sc.Setup()).To(MatchError("failed to setup spoof-check: " + errorFirstApplyText))
+		})
+
+		It("fails to setup config when 2nd apply is unsuccessful (flush and add the rules)", func() {
+			c := &configurerStub{failSecondApplyConfig: true}
+			sc := link.NewSpoofCheckerWithConfigurer(iface, mac, id, c)
+			Expect(sc.Setup()).To(MatchError("failed to setup spoof-check: " + errorSecondApplyText))
+		})
+	})
+
+	Context("teardown", func() {
+		It("succeeds", func() {
+			existingConfig := nft.NewConfig()
+			existingConfig.FromJSON([]byte(rowConfigWithRulesOnly()))
+			c := configurerStub{readConfig: existingConfig}
+
+			sc := link.NewSpoofCheckerWithConfigurer("", "", id, &c)
+			Expect(sc.Teardown()).To(Succeed())
+
+			assertExpectedBaseChainRuleDeletionInTeardownConfig(c)
+			assertExpectedRegularChainsDeletionInTeardownConfig(c)
+		})
+
+		It("fails, 1st apply is unsuccessful (delete iface match rule)", func() {
+			config := nft.NewConfig()
+			config.FromJSON([]byte(rowConfigWithRulesOnly()))
+			c := &configurerStub{applyConfig: []*nft.Config{config}, readConfig: config, failFirstApplyConfig: true}
+			sc := link.NewSpoofCheckerWithConfigurer("", "", id, c)
+			Expect(sc.Teardown()).To(MatchError(fmt.Sprintf(
+				"failed to teardown spoof-check: failed to delete iface match rule: %s, <nil>", errorFirstApplyText,
+			)))
+		})
+
+		It("fails, read current config is unsuccessful", func() {
+			config := nft.NewConfig()
+			config.FromJSON([]byte(rowConfigWithRulesOnly()))
+			c := &configurerStub{applyConfig: []*nft.Config{config}, readConfig: config, failReadConfig: true}
+			sc := link.NewSpoofCheckerWithConfigurer("", "", id, c)
+			Expect(sc.Teardown()).To(MatchError(fmt.Sprintf(
+				"failed to teardown spoof-check: %s, <nil>", errorReadText,
+			)))
+		})
+
+		It("fails, 2nd apply is unsuccessful (delete the regular chains)", func() {
+			config := nft.NewConfig()
+			config.FromJSON([]byte(rowConfigWithRulesOnly()))
+			c := &configurerStub{applyConfig: []*nft.Config{config}, readConfig: config, failSecondApplyConfig: true}
+			sc := link.NewSpoofCheckerWithConfigurer("", "", id, c)
+			Expect(sc.Teardown()).To(MatchError(fmt.Sprintf(
+				"failed to teardown spoof-check: <nil>, failed to delete regular chains: %s", errorSecondApplyText,
+			)))
+		})
+
+		It("fails, both applies are unsuccessful", func() {
+			config := nft.NewConfig()
+			config.FromJSON([]byte(rowConfigWithRulesOnly()))
+			c := &configurerStub{
+				applyConfig:           []*nft.Config{config},
+				readConfig:            config,
+				failFirstApplyConfig:  true,
+				failSecondApplyConfig: true,
+			}
+			sc := link.NewSpoofCheckerWithConfigurer("", "", id, c)
+			Expect(sc.Teardown()).To(MatchError(fmt.Sprintf(
+				"failed to teardown spoof-check: "+
+					"failed to delete iface match rule: %s, "+
+					"failed to delete regular chains: %s",
+				errorFirstApplyText, errorSecondApplyText,
+			)))
+		})
+	})
+})
+
+func assertExpectedRegularChainsDeletionInTeardownConfig(action configurerStub) {
+	deleteRegularChainRulesJsonConfig, err := action.applyConfig[1].ToJSON()
+	ExpectWithOffset(1, err).NotTo(HaveOccurred())
+
+	expectedDeleteRegularChainRulesJsonConfig := `
+			{"nftables": [
+				{"delete": {"chain": {
+					"family": "bridge",
+					"table": "nat",
+					"name": "cni-br-iface-container99-net1"
+				}}},
+				{"delete": {"chain": {
+					"family": "bridge",
+					"table": "nat",
+					"name": "cni-br-iface-container99-net1-mac"
+				}}}
+			]}`
+
+	ExpectWithOffset(1, string(deleteRegularChainRulesJsonConfig)).To(MatchJSON(expectedDeleteRegularChainRulesJsonConfig))
+}
+
+func assertExpectedBaseChainRuleDeletionInTeardownConfig(action configurerStub) {
+	deleteBaseChainRuleJsonConfig, err := action.applyConfig[0].ToJSON()
+	Expect(err).NotTo(HaveOccurred())
+
+	expectedDeleteIfaceMatchRuleJsonConfig := `
+            {"nftables": [
+				{"delete": {"rule": {
+					"family": "bridge",
+					"table": "nat",
+					"chain": "PREROUTING",
+					"expr": [
+						{"match": {
+							"op": "==",
+							"left": {"meta": {"key": "iifname"}},
+							"right": "net0"
+						}},
+						{"jump": {"target": "cni-br-iface-container99-net1"}}
+					],
+					"comment": "macspoofchk-container99-net1"
+				}}}
+			]}`
+	Expect(string(deleteBaseChainRuleJsonConfig)).To(MatchJSON(expectedDeleteIfaceMatchRuleJsonConfig))
+}
+
+func rowConfigWithRulesOnly() string {
+	return `
+            {"nftables":[
+                {"rule":{"family":"bridge","table":"nat","chain":"PREROUTING",
+                    "expr":[
+                        {"match":{"op":"==","left":{"meta":{"key":"iifname"}},"right":"net0"}},
+                        {"jump":{"target":"cni-br-iface-container99-net1"}}
+                    ],
+                    "comment":"macspoofchk-container99-net1"}},
+                {"rule":{"family":"bridge","table":"nat","chain":"cni-br-iface-container99-net1",
+                    "expr":[
+                        {"jump":{"target":"cni-br-iface-container99-net1-mac"}}
+                    ],
+                    "comment":"macspoofchk-container99-net1"}},
+                {"rule":{"family":"bridge","table":"nat","chain":"cni-br-iface-container99-net1-mac",
+                    "expr":[
+                        {"match":{
+                            "op":"==",
+                            "left":{"payload":{"protocol":"ether","field":"saddr"}},
+                            "right":"02:00:00:00:12:34"
+                        }},
+                        {"return":null}
+                    ],
+                    "comment":"macspoofchk-container99-net1"}},
+                {"rule":{"family":"bridge","table":"nat","chain":"cni-br-iface-container99-net1-mac",
+                    "expr":[{"drop":null}],
+                    "index":0,
+                    "comment":"macspoofchk-container99-net1"}}
+            ]}`
+}
+
+func assertExpectedTableAndChainsInSetupConfig(c configurerStub) {
+	config := c.applyConfig[0]
+	jsonConfig, err := config.ToJSON()
+	ExpectWithOffset(1, err).NotTo(HaveOccurred())
+
+	expectedConfig := `
+        {"nftables": [
+            {"table": {"family": "bridge", "name": "nat"}},
+            {"chain": {
+                "family": "bridge",
+                "table": "nat",
+                "name": "PREROUTING",
+                "type": "filter",
+                "hook": "prerouting",
+                "prio": -300,
+                "policy": "accept"
+            }},
+            {"chain": {
+                "family": "bridge",
+                "table": "nat",
+                "name": "cni-br-iface-container99-net1"
+            }},
+            {"chain": {
+                "family": "bridge",
+                "table": "nat",
+                "name": "cni-br-iface-container99-net1-mac"
+            }}
+        ]}`
+	ExpectWithOffset(1, string(jsonConfig)).To(MatchJSON(expectedConfig))
+}
+
+func assertExpectedRulesInSetupConfig(c configurerStub) {
+	config := c.applyConfig[1]
+	jsonConfig, err := config.ToJSON()
+	ExpectWithOffset(1, err).NotTo(HaveOccurred())
+
+	expectedConfig := `
+            {"nftables":[
+                {"flush":{"chain":{"family":"bridge","table":"nat","name":"cni-br-iface-container99-net1"}}},
+                {"flush":{"chain":{"family":"bridge","table":"nat","name":"cni-br-iface-container99-net1-mac"}}},
+                {"rule":{"family":"bridge","table":"nat","chain":"PREROUTING",
+                    "expr":[
+                        {"match":{"op":"==","left":{"meta":{"key":"iifname"}},"right":"net0"}},
+                        {"jump":{"target":"cni-br-iface-container99-net1"}}
+                    ],
+                    "comment":"macspoofchk-container99-net1"}},
+                {"rule":{"family":"bridge","table":"nat","chain":"cni-br-iface-container99-net1",
+                    "expr":[
+                        {"jump":{"target":"cni-br-iface-container99-net1-mac"}}
+                    ],
+                    "comment":"macspoofchk-container99-net1"}},
+                {"rule":{"family":"bridge","table":"nat","chain":"cni-br-iface-container99-net1-mac",
+                    "expr":[
+                        {"match":{
+                            "op":"==",
+                            "left":{"payload":{"protocol":"ether","field":"saddr"}},
+                            "right":"02:00:00:00:12:34"
+                        }},
+                        {"return":null}
+                    ],
+                    "comment":"macspoofchk-container99-net1"}},
+                {"rule":{"family":"bridge","table":"nat","chain":"cni-br-iface-container99-net1-mac",
+                    "expr":[{"drop":null}],
+                    "index":0,
+                    "comment":"macspoofchk-container99-net1"}}
+            ]}`
+	ExpectWithOffset(1, string(jsonConfig)).To(MatchJSON(expectedConfig))
+}
+
+const (
+	errorFirstApplyText  = "1st apply failed"
+	errorSecondApplyText = "2nd apply failed"
+	errorReadText        = "read failed"
+)
+
+type configurerStub struct {
+	applyConfig []*nft.Config
+	readConfig  *nft.Config
+
+	applyCounter int
+
+	failFirstApplyConfig  bool
+	failSecondApplyConfig bool
+	failReadConfig        bool
+}
+
+func (a *configurerStub) Apply(c *nft.Config) error {
+	a.applyCounter++
+	if a.failFirstApplyConfig && a.applyCounter == 1 {
+		return fmt.Errorf(errorFirstApplyText)
+	}
+	if a.failSecondApplyConfig && a.applyCounter == 2 {
+		return fmt.Errorf(errorSecondApplyText)
+	}
+	a.applyConfig = append(a.applyConfig, c)
+	return nil
+}
+
+func (a *configurerStub) Read() (*nft.Config, error) {
+	if a.failReadConfig {
+		return nil, fmt.Errorf(errorReadText)
+	}
+	return a.readConfig, nil
+}

pkg/ns/ns_linux.go

@@ -106,8 +106,8 @@ var _ NetNS = &netNS{}
 
 const (
 	// https://github.com/torvalds/linux/blob/master/include/uapi/linux/magic.h
-	NSFS_MAGIC   = 0x6e736673
+	NSFS_MAGIC   = unix.NSFS_MAGIC
-	PROCFS_MAGIC = 0x9fa0
+	PROCFS_MAGIC = unix.PROC_SUPER_MAGIC
 )
 
 type NSPathNotExistErr struct{ msg string }

pkg/testutils/netns_linux.go

@@ -53,7 +53,7 @@ func NewNS() (ns.NetNS, error) {
 	nsRunDir := getNsRunDir()
 
 	b := make([]byte, 16)
-	_, err := rand.Reader.Read(b)
+	_, err := rand.Read(b)
 	if err != nil {
 		return nil, fmt.Errorf("failed to generate random netns name: %v", err)
 	}

pkg/utils/conntrack.go

@@ -62,8 +62,8 @@ func DeleteConntrackEntriesForDstIP(dstIP string, protocol uint8) error {
 // by the given destination port, protocol and IP family
 func DeleteConntrackEntriesForDstPort(port uint16, protocol uint8, family netlink.InetFamily) error {
 	filter := &netlink.ConntrackFilter{}
-	filter.AddPort(netlink.ConntrackOrigDstPort, port)
 	filter.AddProtocol(protocol)
+	filter.AddPort(netlink.ConntrackOrigDstPort, port)
 
 	_, err := netlink.ConntrackDeleteFilter(netlink.ConntrackTable, family, filter)
 	if err != nil {

pkg/utils/hwaddr/hwaddr.go

@@ -1,63 +0,0 @@
-// Copyright 2016 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package hwaddr
-
-import (
-	"fmt"
-	"net"
-)
-
-const (
-	ipRelevantByteLen      = 4
-	PrivateMACPrefixString = "0a:58"
-)
-
-var (
-	// private mac prefix safe to use
-	PrivateMACPrefix = []byte{0x0a, 0x58}
-)
-
-type SupportIp4OnlyErr struct{ msg string }
-
-func (e SupportIp4OnlyErr) Error() string { return e.msg }
-
-type MacParseErr struct{ msg string }
-
-func (e MacParseErr) Error() string { return e.msg }
-
-type InvalidPrefixLengthErr struct{ msg string }
-
-func (e InvalidPrefixLengthErr) Error() string { return e.msg }
-
-// GenerateHardwareAddr4 generates 48 bit virtual mac addresses based on the IP4 input.
-func GenerateHardwareAddr4(ip net.IP, prefix []byte) (net.HardwareAddr, error) {
-	switch {
-
-	case ip.To4() == nil:
-		return nil, SupportIp4OnlyErr{msg: "GenerateHardwareAddr4 only supports valid IPv4 address as input"}
-
-	case len(prefix) != len(PrivateMACPrefix):
-		return nil, InvalidPrefixLengthErr{msg: fmt.Sprintf(
-			"Prefix has length %d instead  of %d", len(prefix), len(PrivateMACPrefix)),
-		}
-	}
-
-	ipByteLen := len(ip)
-	return (net.HardwareAddr)(
-		append(
-			prefix,
-			ip[ipByteLen-ipRelevantByteLen:ipByteLen]...),
-	), nil
-}

pkg/utils/hwaddr/hwaddr_suite_test.go

@@ -1,27 +0,0 @@
-// Copyright 2016 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package hwaddr_test
-
-import (
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-
-	"testing"
-)
-
-func TestHwaddr(t *testing.T) {
-	RegisterFailHandler(Fail)
-	RunSpecs(t, "pkg/utils/hwaddr")
-}

pkg/utils/hwaddr/hwaddr_test.go

@@ -1,74 +0,0 @@
-// Copyright 2016 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package hwaddr_test
-
-import (
-	"net"
-
-	"github.com/containernetworking/plugins/pkg/utils/hwaddr"
-
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-)
-
-var _ = Describe("Hwaddr", func() {
-	Context("Generate Hardware Address", func() {
-		It("generate hardware address based on ipv4 address", func() {
-			testCases := []struct {
-				ip          net.IP
-				expectedMAC net.HardwareAddr
-			}{
-				{
-					ip:          net.ParseIP("10.0.0.2"),
-					expectedMAC: (net.HardwareAddr)(append(hwaddr.PrivateMACPrefix, 0x0a, 0x00, 0x00, 0x02)),
-				},
-				{
-					ip:          net.ParseIP("10.250.0.244"),
-					expectedMAC: (net.HardwareAddr)(append(hwaddr.PrivateMACPrefix, 0x0a, 0xfa, 0x00, 0xf4)),
-				},
-				{
-					ip:          net.ParseIP("172.17.0.2"),
-					expectedMAC: (net.HardwareAddr)(append(hwaddr.PrivateMACPrefix, 0xac, 0x11, 0x00, 0x02)),
-				},
-				{
-					ip:          net.IPv4(byte(172), byte(17), byte(0), byte(2)),
-					expectedMAC: (net.HardwareAddr)(append(hwaddr.PrivateMACPrefix, 0xac, 0x11, 0x00, 0x02)),
-				},
-			}
-
-			for _, tc := range testCases {
-				mac, err := hwaddr.GenerateHardwareAddr4(tc.ip, hwaddr.PrivateMACPrefix)
-				Expect(err).NotTo(HaveOccurred())
-				Expect(mac).To(Equal(tc.expectedMAC))
-			}
-		})
-
-		It("return error if input is not ipv4 address", func() {
-			testCases := []net.IP{
-				net.ParseIP(""),
-				net.ParseIP("2001:db8:0:1:1:1:1:1"),
-			}
-			for _, tc := range testCases {
-				_, err := hwaddr.GenerateHardwareAddr4(tc, hwaddr.PrivateMACPrefix)
-				Expect(err).To(BeAssignableToTypeOf(hwaddr.SupportIp4OnlyErr{}))
-			}
-		})
-
-		It("return error if prefix is invalid", func() {
-			_, err := hwaddr.GenerateHardwareAddr4(net.ParseIP("10.0.0.2"), []byte{0x58})
-			Expect(err).To(BeAssignableToTypeOf(hwaddr.InvalidPrefixLengthErr{}))
-		})
-	})
-})

pkg/utils/iptables.go

@@ -119,3 +119,21 @@ func ClearChain(ipt *iptables.IPTables, table, chain string) error {
 		return err
 	}
 }
+
+// InsertUnique will add a rule to a chain if it does not already exist.
+// By default the rule is appended, unless prepend is true.
+func InsertUnique(ipt *iptables.IPTables, table, chain string, prepend bool, rule []string) error {
+	exists, err := ipt.Exists(table, chain, rule...)
+	if err != nil {
+		return err
+	}
+	if exists {
+		return nil
+	}
+
+	if prepend {
+		return ipt.Insert(table, chain, 1, rule...)
+	} else {
+		return ipt.Append(table, chain, rule...)
+	}
+}

pkg/utils/sysctl/sysctl_linux.go

@@ -36,7 +36,6 @@ func Sysctl(name string, params ...string) (string, error) {
 
 func getSysctl(name string) (string, error) {
 	fullName := filepath.Join("/proc/sys", toNormalName(name))
-	fullName = filepath.Clean(fullName)
 	data, err := ioutil.ReadFile(fullName)
 	if err != nil {
 		return "", err
@@ -47,7 +46,6 @@ func getSysctl(name string) (string, error) {
 
 func setSysctl(name, value string) (string, error) {
 	fullName := filepath.Join("/proc/sys", toNormalName(name))
-	fullName = filepath.Clean(fullName)
 	if err := ioutil.WriteFile(fullName, []byte(value), 0644); err != nil {
 		return "", err
 	}

plugins/ipam/dhcp/daemon.go

@@ -29,13 +29,10 @@ import (
 	"time"
 
 	"github.com/containernetworking/cni/pkg/skel"
-	"github.com/containernetworking/cni/pkg/types"
 	current "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/coreos/go-systemd/v22/activation"
 )
 
-const listenFdsStart = 3
-
 var errNoMoreTries = errors.New("no more tries")
 
 type DHCP struct {
@@ -55,21 +52,35 @@ func newDHCP(clientTimeout, clientResendMax time.Duration) *DHCP {
 	}
 }
 
+// TODO: current client ID is too long. At least the container ID should not be used directly.
+// A seperate issue is necessary to ensure no breaking change is affecting other users.
 func generateClientID(containerID string, netName string, ifName string) string {
-	return containerID + "/" + netName + "/" + ifName
+	clientID := containerID + "/" + netName + "/" + ifName
+	// defined in RFC 2132, length size can not be larger than 1 octet. So we truncate 254 to make everyone happy.
+	if len(clientID) > 254 {
+		clientID = clientID[0:254]
+	}
+	return clientID
 }
 
 // Allocate acquires an IP from a DHCP server for a specified container.
 // The acquired lease will be maintained until Release() is called.
 func (d *DHCP) Allocate(args *skel.CmdArgs, result *current.Result) error {
-	conf := types.NetConf{}
+	conf := NetConf{}
 	if err := json.Unmarshal(args.StdinData, &conf); err != nil {
 		return fmt.Errorf("error parsing netconf: %v", err)
 	}
 
+	optsRequesting, optsProviding, err := prepareOptions(args.Args, conf.IPAM.ProvideOptions, conf.IPAM.RequestOptions)
+	if err != nil {
+		return err
+	}
+
 	clientID := generateClientID(args.ContainerID, conf.Name, args.IfName)
 	hostNetns := d.hostNetnsPrefix + args.Netns
-	l, err := AcquireLease(clientID, hostNetns, args.IfName, d.clientTimeout, d.clientResendMax, d.broadcast)
+	l, err := AcquireLease(clientID, hostNetns, args.IfName,
+		optsRequesting, optsProviding,
+		d.clientTimeout, d.clientResendMax, d.broadcast)
 	if err != nil {
 		return err
 	}
@@ -94,7 +105,7 @@ func (d *DHCP) Allocate(args *skel.CmdArgs, result *current.Result) error {
 // Release stops maintenance of the lease acquired in Allocate()
 // and sends a release msg to the DHCP server.
 func (d *DHCP) Release(args *skel.CmdArgs, reply *struct{}) error {
-	conf := types.NetConf{}
+	conf := NetConf{}
 	if err := json.Unmarshal(args.StdinData, &conf); err != nil {
 		return fmt.Errorf("error parsing netconf: %v", err)
 	}

plugins/ipam/dhcp/lease.go

@@ -19,6 +19,7 @@ import (
 	"log"
 	"math/rand"
 	"net"
+	"strings"
 	"sync"
 	"sync/atomic"
 	"time"
@@ -36,6 +37,11 @@ import (
 const resendDelay0 = 4 * time.Second
 const resendDelayMax = 62 * time.Second
 
+// To speed up the retry for first few failures, we retry without
+// backoff for a few times
+const resendFastDelay = 2 * time.Second
+const resendFastMax = 4
+
 const (
 	leaseStateBound = iota
 	leaseStateRenewing
@@ -62,6 +68,74 @@ type DHCPLease struct {
 	stopping      uint32
 	stop          chan struct{}
 	wg            sync.WaitGroup
+	// list of requesting and providing options and if they are necessary / their value
+	optsRequesting map[dhcp4.OptionCode]bool
+	optsProviding  map[dhcp4.OptionCode][]byte
+}
+
+var requestOptionsDefault = map[dhcp4.OptionCode]bool{
+	dhcp4.OptionRouter:     true,
+	dhcp4.OptionSubnetMask: true,
+}
+
+func prepareOptions(cniArgs string, ProvideOptions []ProvideOption, RequestOptions []RequestOption) (
+	optsRequesting map[dhcp4.OptionCode]bool, optsProviding map[dhcp4.OptionCode][]byte, err error) {
+
+	// parse CNI args
+	cniArgsParsed := map[string]string{}
+	for _, argPair := range strings.Split(cniArgs, ";") {
+		args := strings.SplitN(argPair, "=", 2)
+		if len(args) > 1 {
+			cniArgsParsed[args[0]] = args[1]
+		}
+	}
+
+	// parse providing options map
+	var optParsed dhcp4.OptionCode
+	optsProviding = make(map[dhcp4.OptionCode][]byte)
+	for _, opt := range ProvideOptions {
+		optParsed, err = parseOptionName(string(opt.Option))
+		if err != nil {
+			err = fmt.Errorf("Can not parse option %q: %w", opt.Option, err)
+			return
+		}
+		if len(opt.Value) > 0 {
+			if len(opt.Value) > 255 {
+				err = fmt.Errorf("value too long for option %q: %q", opt.Option, opt.Value)
+				return
+			}
+			optsProviding[optParsed] = []byte(opt.Value)
+		}
+		if value, ok := cniArgsParsed[opt.ValueFromCNIArg]; ok {
+			if len(value) > 255 {
+				err = fmt.Errorf("value too long for option %q from CNI_ARGS %q: %q", opt.Option, opt.ValueFromCNIArg, opt.Value)
+				return
+			}
+			optsProviding[optParsed] = []byte(value)
+		}
+	}
+
+	// parse necessary options map
+	optsRequesting = make(map[dhcp4.OptionCode]bool)
+	skipRequireDefault := false
+	for _, opt := range RequestOptions {
+		if opt.SkipDefault {
+			skipRequireDefault = true
+		}
+		optParsed, err = parseOptionName(string(opt.Option))
+		if err != nil {
+			err = fmt.Errorf("Can not parse option %q: %w", opt.Option, err)
+			return
+		}
+		optsRequesting[optParsed] = true
+	}
+	for k, v := range requestOptionsDefault {
+		// only set if not skipping default and this value does not exists
+		if _, ok := optsRequesting[k]; !ok && !skipRequireDefault {
+			optsRequesting[k] = v
+		}
+	}
+	return
 }
 
 // AcquireLease gets an DHCP lease and then maintains it in the background
@@ -69,6 +143,7 @@ type DHCPLease struct {
 // calling DHCPLease.Stop()
 func AcquireLease(
 	clientID, netns, ifName string,
+	optsRequesting map[dhcp4.OptionCode]bool, optsProviding map[dhcp4.OptionCode][]byte,
 	timeout, resendMax time.Duration, broadcast bool,
 ) (*DHCPLease, error) {
 	errCh := make(chan error, 1)
@@ -78,6 +153,8 @@ func AcquireLease(
 		timeout:        timeout,
 		resendMax:      resendMax,
 		broadcast:      broadcast,
+		optsRequesting: optsRequesting,
+		optsProviding:  optsProviding,
 	}
 
 	log.Printf("%v: acquiring lease", clientID)
@@ -139,7 +216,17 @@ func (l *DHCPLease) acquire() error {
 
 	opts := make(dhcp4.Options)
 	opts[dhcp4.OptionClientIdentifier] = []byte(l.clientID)
-	opts[dhcp4.OptionParameterRequestList] = []byte{byte(dhcp4.OptionRouter), byte(dhcp4.OptionSubnetMask)}
+	opts[dhcp4.OptionParameterRequestList] = []byte{}
+	for k := range l.optsRequesting {
+		opts[dhcp4.OptionParameterRequestList] = append(opts[dhcp4.OptionParameterRequestList], byte(k))
+	}
+	for k, v := range l.optsProviding {
+		opts[k] = v
+	}
+	// client identifier's first byte is "type"
+	newClientID := []byte{0}
+	newClientID = append(newClientID, opts[dhcp4.OptionClientIdentifier]...)
+	opts[dhcp4.OptionClientIdentifier] = newClientID
 
 	pkt, err := backoffRetry(l.resendMax, func() (*dhcp4.Packet, error) {
 		ok, ack, err := DhcpRequest(c, opts)
@@ -345,7 +432,7 @@ func jitter(span time.Duration) time.Duration {
 func backoffRetry(resendMax time.Duration, f func() (*dhcp4.Packet, error)) (*dhcp4.Packet, error) {
 	var baseDelay time.Duration = resendDelay0
 	var sleepTime time.Duration
-
+	var fastRetryLimit = resendFastMax
 	for {
 		pkt, err := f()
 		if err == nil {
@@ -354,15 +441,21 @@ func backoffRetry(resendMax time.Duration, f func() (*dhcp4.Packet, error)) (*dh
 
 		log.Print(err)
 
+		if fastRetryLimit == 0 {
 			sleepTime = baseDelay + jitter(time.Second)
+		} else {
+			sleepTime = resendFastDelay + jitter(time.Second)
+			fastRetryLimit--
+		}
 
 		log.Printf("retrying in %f seconds", sleepTime.Seconds())
 
 		time.Sleep(sleepTime)
 
-		if baseDelay < resendMax {
+		// only adjust delay time if we are in normal backoff stage
+		if baseDelay < resendMax && fastRetryLimit == 0 {
 			baseDelay *= 2
-		} else {
+		} else if fastRetryLimit == 0 { // only break if we are at normal delay
 			break
 		}
 	}

plugins/ipam/dhcp/main.go

@@ -33,6 +33,43 @@ import (
 
 const defaultSocketPath = "/run/cni/dhcp.sock"
 
+// The top-level network config - IPAM plugins are passed the full configuration
+// of the calling plugin, not just the IPAM section.
+type NetConf struct {
+	types.NetConf
+	IPAM *IPAMConfig `json:"ipam"`
+}
+
+type IPAMConfig struct {
+	types.IPAM
+	DaemonSocketPath string `json:"daemonSocketPath"`
+	// When requesting IP from DHCP server, carry these options for management purpose.
+	// Some fields have default values, and can be override by setting a new option with the same name at here.
+	ProvideOptions []ProvideOption `json:"provide"`
+	// When requesting IP from DHCP server, claiming these options are necessary. Options are necessary unless `optional`
+	// is set to `false`.
+	// To override default requesting fields, set `skipDefault` to `false`.
+	// If an field is not optional, but the server failed to provide it, error will be raised.
+	RequestOptions []RequestOption `json:"request"`
+}
+
+// DHCPOption represents a DHCP option. It can be a number, or a string defined in manual dhcp-options(5).
+// Note that not all DHCP options are supported at all time. Error will be raised if unsupported options are used.
+type DHCPOption string
+
+type ProvideOption struct {
+	Option DHCPOption `json:"option"`
+
+	Value           string `json:"value"`
+	ValueFromCNIArg string `json:"fromArg"`
+}
+
+type RequestOption struct {
+	SkipDefault bool `json:"skipDefault"`
+
+	Option DHCPOption `json:"option"`
+}
+
 func main() {
 	if len(os.Args) > 1 && os.Args[1] == "daemon" {
 		var pidfilePath string
@@ -55,7 +92,7 @@ func main() {
 		}
 
 		if err := runDaemon(pidfilePath, hostPrefix, socketPath, timeout, resendMax, broadcast); err != nil {
-			log.Printf(err.Error())
+			log.Print(err.Error())
 			os.Exit(1)
 		}
 	} else {
@@ -88,8 +125,6 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func cmdCheck(args *skel.CmdArgs) error {
-	// TODO: implement
-	//return fmt.Errorf("not implemented")
 	// Plugin must return result in same version as specified in netconf
 	versionDecoder := &version.ConfigDecoder{}
 	//confVersion, err := versionDecoder.Decode(args.StdinData)
@@ -106,16 +141,8 @@ func cmdCheck(args *skel.CmdArgs) error {
 	return nil
 }
 
-type SocketPathConf struct {
-	DaemonSocketPath string `json:"daemonSocketPath,omitempty"`
-}
-
-type TempNetConf struct {
-	IPAM SocketPathConf `json:"ipam,omitempty"`
-}
-
 func getSocketPath(stdinData []byte) (string, error) {
-	conf := TempNetConf{}
+	conf := NetConf{}
 	if err := json.Unmarshal(stdinData, &conf); err != nil {
 		return "", fmt.Errorf("error parsing socket path conf: %v", err)
 	}

plugins/ipam/dhcp/options.go

@@ -18,12 +18,33 @@ import (
 	"encoding/binary"
 	"fmt"
 	"net"
+	"strconv"
 	"time"
 
 	"github.com/containernetworking/cni/pkg/types"
 	"github.com/d2g/dhcp4"
 )
 
+var optionNameToID = map[string]dhcp4.OptionCode{
+	"dhcp-client-identifier":  dhcp4.OptionClientIdentifier,
+	"subnet-mask":             dhcp4.OptionSubnetMask,
+	"routers":                 dhcp4.OptionRouter,
+	"host-name":               dhcp4.OptionHostName,
+	"user-class":              dhcp4.OptionUserClass,
+	"vendor-class-identifier": dhcp4.OptionVendorClassIdentifier,
+}
+
+func parseOptionName(option string) (dhcp4.OptionCode, error) {
+	if val, ok := optionNameToID[option]; ok {
+		return val, nil
+	}
+	i, err := strconv.ParseUint(option, 10, 8)
+	if err != nil {
+		return 0, fmt.Errorf("Can not parse option: %w", err)
+	}
+	return dhcp4.OptionCode(i), nil
+}
+
 func parseRouter(opts dhcp4.Options) net.IP {
 	if opts, ok := opts[dhcp4.OptionRouter]; ok {
 		if len(opts) == 4 {

plugins/ipam/dhcp/options_test.go

@@ -16,6 +16,7 @@ package main
 
 import (
 	"net"
+	"reflect"
 	"testing"
 
 	"github.com/containernetworking/cni/pkg/types"
@@ -73,3 +74,34 @@ func TestParseCIDRRoutes(t *testing.T) {
 
 	validateRoutes(t, routes)
 }
+
+func TestParseOptionName(t *testing.T) {
+	tests := []struct {
+		name    string
+		option  string
+		want    dhcp4.OptionCode
+		wantErr bool
+	}{
+		{
+			"hostname", "host-name", dhcp4.OptionHostName, false,
+		},
+		{
+			"hostname in number", "12", dhcp4.OptionHostName, false,
+		},
+		{
+			"random string", "doNotparseMe", 0, true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := parseOptionName(tt.option)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("parseOptionName() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("parseOptionName() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

plugins/ipam/host-local/backend/allocator/config.go

@@ -57,11 +57,11 @@ type IPAMConfig struct {
 
 type IPAMEnvArgs struct {
 	types.CommonArgs
-	IP net.IP `json:"ip,omitempty"`
+	IP ip.IP `json:"ip,omitempty"`
 }
 
 type IPAMArgs struct {
-	IPs []net.IP `json:"ips"`
+	IPs []*ip.IP `json:"ips"`
 }
 
 type RangeSet []Range
@@ -84,8 +84,7 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 		return nil, "", fmt.Errorf("IPAM config missing 'ipam' key")
 	}
 
-	// Parse custom IP from env args, the top-level args config and capabilities
+	// parse custom IP from env args
-	// in runtime configuration
 	if envArgs != "" {
 		e := IPAMEnvArgs{}
 		err := types.LoadArgs(envArgs, &e)
@@ -93,15 +92,19 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 			return nil, "", err
 		}
 
-		if e.IP != nil {
+		if e.IP.ToIP() != nil {
-			n.IPAM.IPArgs = []net.IP{e.IP}
+			n.IPAM.IPArgs = []net.IP{e.IP.ToIP()}
 		}
 	}
 
+	// parse custom IPs from CNI args in network config
 	if n.Args != nil && n.Args.A != nil && len(n.Args.A.IPs) != 0 {
-		n.IPAM.IPArgs = append(n.IPAM.IPArgs, n.Args.A.IPs...)
+		for _, i := range n.Args.A.IPs {
+			n.IPAM.IPArgs = append(n.IPAM.IPArgs, i.ToIP())
+		}
 	}
 
+	// parse custom IPs from runtime configuration
 	if len(n.RuntimeConfig.IPs) > 0 {
 		for _, i := range n.RuntimeConfig.IPs {
 			n.IPAM.IPArgs = append(n.IPAM.IPArgs, i.ToIP())

plugins/ipam/host-local/backend/allocator/config_test.go

@@ -205,7 +205,8 @@ var _ = Describe("IPAM config", func() {
 		}))
 	})
 
-	It("Should parse CNI_ARGS env", func() {
+	Context("Should parse CNI_ARGS env", func() {
+		It("without prefix", func() {
 			input := `{
 			"cniVersion": "0.3.1",
 			"name": "mynet",
@@ -229,10 +230,37 @@ var _ = Describe("IPAM config", func() {
 			conf, _, err := LoadIPAMConfig([]byte(input), envArgs)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(conf.IPArgs).To(Equal([]net.IP{{10, 1, 2, 10}}))
-
 		})
 
-	It("Should parse config args", func() {
+		It("with prefix", func() {
+			input := `{
+			"cniVersion": "0.3.1",
+			"name": "mynet",
+			"type": "ipvlan",
+			"master": "foo0",
+			"ipam": {
+				"type": "host-local",
+				"ranges": [[
+					{
+						"subnet": "10.1.2.0/24",
+						"rangeStart": "10.1.2.9",
+						"rangeEnd": "10.1.2.20",
+						"gateway": "10.1.2.30"
+					}
+				]]
+			}
+		}`
+
+			envArgs := "IP=10.1.2.11/24"
+
+			conf, _, err := LoadIPAMConfig([]byte(input), envArgs)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(conf.IPArgs).To(Equal([]net.IP{{10, 1, 2, 11}}))
+		})
+	})
+
+	Context("Should parse config args", func() {
+		It("without prefix", func() {
 			input := `{
 			"cniVersion": "0.3.1",
 			"name": "mynet",
@@ -277,6 +305,52 @@ var _ = Describe("IPAM config", func() {
 			}))
 		})
 
+		It("with prefix", func() {
+			input := `{
+			"cniVersion": "0.3.1",
+			"name": "mynet",
+			"type": "ipvlan",
+			"master": "foo0",
+			"args": {
+				"cni": {
+					"ips": [ "10.1.2.11/24", "11.11.11.11/24", "2001:db8:1::11/64"]
+				}
+			},
+			"ipam": {
+				"type": "host-local",
+				"ranges": [
+					[{
+						"subnet": "10.1.2.0/24",
+						"rangeStart": "10.1.2.9",
+						"rangeEnd": "10.1.2.20",
+						"gateway": "10.1.2.30"
+					}],
+					[{
+						"subnet": "11.1.2.0/24",
+						"rangeStart": "11.1.2.9",
+						"rangeEnd": "11.1.2.20",
+						"gateway": "11.1.2.30"
+					}],
+					[{
+						"subnet": "2001:db8:1::/64"
+					}]
+				]
+			}
+		}`
+
+			envArgs := "IP=10.1.2.10/24"
+
+			conf, _, err := LoadIPAMConfig([]byte(input), envArgs)
+			Expect(err).NotTo(HaveOccurred())
+			Expect(conf.IPArgs).To(Equal([]net.IP{
+				{10, 1, 2, 10},
+				{10, 1, 2, 11},
+				{11, 11, 11, 11},
+				net.ParseIP("2001:db8:1::11"),
+			}))
+		})
+	})
+
 	It("Should detect overlap between rangesets", func() {
 		input := `{
 			"cniVersion": "0.3.1",

plugins/ipam/static/main.go

@@ -161,7 +161,7 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 
 				ip, subnet, err := net.ParseCIDR(ipstr)
 				if err != nil {
-					return nil, "", fmt.Errorf("invalid CIDR %s: %s", ipstr, err)
+					return nil, "", fmt.Errorf("the 'ip' field is expected to be in CIDR notation, got: '%s'", ipstr)
 				}
 
 				addr := Address{
@@ -192,8 +192,13 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 	if n.Args != nil && n.Args.A != nil && len(n.Args.A.IPs) != 0 {
 		// args IP overwrites IP, so clear IPAM Config
 		n.IPAM.Addresses = make([]Address, 0, len(n.Args.A.IPs))
-		for _, addr := range n.Args.A.IPs {
+		for _, addrStr := range n.Args.A.IPs {
-			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addr})
+			ip, addr, err := net.ParseCIDR(addrStr)
+			if err != nil {
+				return nil, "", fmt.Errorf("an entry in the 'ips' field is NOT in CIDR notation, got: '%s'", addrStr)
+			}
+			addr.IP = ip
+			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addrStr, Address: *addr})
 		}
 	}
 
@@ -201,8 +206,13 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 	if len(n.RuntimeConfig.IPs) != 0 {
 		// runtimeConfig IP overwrites IP, so clear IPAM Config
 		n.IPAM.Addresses = make([]Address, 0, len(n.RuntimeConfig.IPs))
-		for _, addr := range n.RuntimeConfig.IPs {
+		for _, addrStr := range n.RuntimeConfig.IPs {
-			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addr})
+			ip, addr, err := net.ParseCIDR(addrStr)
+			if err != nil {
+				return nil, "", fmt.Errorf("an entry in the 'ips' field is NOT in CIDR notation, got: '%s'", addrStr)
+			}
+			addr.IP = ip
+			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addrStr, Address: *addr})
 		}
 	}
 
@@ -211,12 +221,15 @@ func LoadIPAMConfig(bytes []byte, envArgs string) (*IPAMConfig, string, error) {
 	numV6 := 0
 
 	for i := range n.IPAM.Addresses {
+		if n.IPAM.Addresses[i].Address.IP == nil {
 			ip, addr, err := net.ParseCIDR(n.IPAM.Addresses[i].AddressStr)
 			if err != nil {
-			return nil, "", fmt.Errorf("invalid CIDR %s: %s", n.IPAM.Addresses[i].AddressStr, err)
+				return nil, "", fmt.Errorf(
+					"the 'address' field is expected to be in CIDR notation, got: '%s'", n.IPAM.Addresses[i].AddressStr)
 			}
 			n.IPAM.Addresses[i].Address = *addr
 			n.IPAM.Addresses[i].Address.IP = ip
+		}
 
 		if err := canonicalizeIP(&n.IPAM.Addresses[i].Address.IP); err != nil {
 			return nil, "", fmt.Errorf("invalid address %d: %s", i, err)

plugins/ipam/static/static_test.go

@@ -546,6 +546,137 @@ var _ = Describe("static Operations", func() {
 			})
 			Expect(err).Should(MatchError("IPAM config missing 'ipam' key"))
 		})
+
+		It(fmt.Sprintf("[%s] errors when passed an invalid CIDR via ipam config", ver), func() {
+			const ifname string = "eth0"
+			const nspath string = "/some/where"
+			const ipStr string = "10.10.0.1"
+
+			conf := fmt.Sprintf(`{
+				"cniVersion": "%s",
+				"name": "mynet",
+				"type": "bridge",
+				"ipam": {
+					"type": "static",
+					"addresses": [ {
+						"address": "%s"
+					}]
+				}
+			}`, ver, ipStr)
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       nspath,
+				IfName:      ifname,
+				StdinData:   []byte(conf),
+			}
+
+			// Allocate the IP
+			_, _, err := testutils.CmdAddWithArgs(args, func() error {
+				return cmdAdd(args)
+			})
+			Expect(err).Should(MatchError(
+				fmt.Sprintf("the 'address' field is expected to be in CIDR notation, got: '%s'", ipStr)))
+		})
+
+		It(fmt.Sprintf("[%s] errors when passed an invalid CIDR via Args", ver), func() {
+			const ifname string = "eth0"
+			const nspath string = "/some/where"
+			const ipStr string = "10.10.0.1"
+
+			conf := fmt.Sprintf(`{
+				"cniVersion": "%s",
+				"name": "mynet",
+				"type": "bridge",
+				"ipam": {
+					"type": "static",
+					"routes": [{ "dst": "0.0.0.0/0" }]
+				}
+			}`, ver)
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       nspath,
+				IfName:      ifname,
+				StdinData:   []byte(conf),
+				Args:        fmt.Sprintf("IP=%s", ipStr),
+			}
+
+			// Allocate the IP
+			_, _, err := testutils.CmdAddWithArgs(args, func() error {
+				return cmdAdd(args)
+			})
+			Expect(err).Should(MatchError(
+				fmt.Sprintf("the 'ip' field is expected to be in CIDR notation, got: '%s'", ipStr)))
+		})
+
+		It(fmt.Sprintf("[%s] errors when passed an invalid CIDR via CNI_ARGS", ver), func() {
+			const ifname string = "eth0"
+			const nspath string = "/some/where"
+			const ipStr string = "10.10.0.1"
+
+			conf := fmt.Sprintf(`{
+				"cniVersion": "%s",
+				"name": "mynet",
+				"type": "bridge",
+				"ipam": {
+					"type": "static",
+					"routes": [{ "dst": "0.0.0.0/0" }]
+				},
+				"args": {
+					"cni": {
+						"ips" : ["%s"]
+					}
+				}
+			}`, ver, ipStr)
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       nspath,
+				IfName:      ifname,
+				StdinData:   []byte(conf),
+			}
+
+			// Allocate the IP
+			_, _, err := testutils.CmdAddWithArgs(args, func() error {
+				return cmdAdd(args)
+			})
+			Expect(err).Should(MatchError(
+				fmt.Sprintf("an entry in the 'ips' field is NOT in CIDR notation, got: '%s'", ipStr)))
+		})
+
+		It(fmt.Sprintf("[%s] errors when passed an invalid CIDR via RuntimeConfig", ver), func() {
+			const ifname string = "eth0"
+			const nspath string = "/some/where"
+			const ipStr string = "10.10.0.1"
+
+			conf := fmt.Sprintf(`{
+				"cniVersion": "%s",
+				"name": "mynet",
+				"type": "bridge",
+				"ipam": {
+					"type": "static",
+					"routes": [{ "dst": "0.0.0.0/0" }]
+				},
+				"RuntimeConfig": {
+					"ips" : ["%s"]
+				}
+			}`, ver, ipStr)
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       nspath,
+				IfName:      ifname,
+				StdinData:   []byte(conf),
+			}
+
+			// Allocate the IP
+			_, _, err := testutils.CmdAddWithArgs(args, func() error {
+				return cmdAdd(args)
+			})
+			Expect(err).Should(MatchError(
+				fmt.Sprintf("an entry in the 'ips' field is NOT in CIDR notation, got: '%s'", ipStr)))
+		})
 	}
 })
 

plugins/main/bridge/bridge.go

@@ -18,13 +18,12 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
+	"os"
 	"runtime"
 	"syscall"
 	"time"
 
-	"github.com/j-keck/arping"
 	"github.com/vishvananda/netlink"
 
 	"github.com/containernetworking/cni/pkg/skel"
@@ -33,6 +32,7 @@ import (
 	"github.com/containernetworking/cni/pkg/version"
 	"github.com/containernetworking/plugins/pkg/ip"
 	"github.com/containernetworking/plugins/pkg/ipam"
+	"github.com/containernetworking/plugins/pkg/link"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/utils"
 	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
@@ -55,6 +55,27 @@ type NetConf struct {
 	HairpinMode  bool   `json:"hairpinMode"`
 	PromiscMode  bool   `json:"promiscMode"`
 	Vlan         int    `json:"vlan"`
+	MacSpoofChk  bool   `json:"macspoofchk,omitempty"`
+	EnableDad    bool   `json:"enabledad,omitempty"`
+
+	Args struct {
+		Cni BridgeArgs `json:"cni,omitempty"`
+	} `json:"args,omitempty"`
+	RuntimeConfig struct {
+		Mac string `json:"mac,omitempty"`
+	} `json:"runtimeConfig,omitempty"`
+
+	mac string
+}
+
+type BridgeArgs struct {
+	Mac string `json:"mac,omitempty"`
+}
+
+// MacEnvArgs represents CNI_ARGS
+type MacEnvArgs struct {
+	types.CommonArgs
+	MAC types.UnmarshallableString `json:"mac,omitempty"`
 }
 
 type gwInfo struct {
@@ -70,7 +91,7 @@ func init() {
 	runtime.LockOSThread()
 }
 
-func loadNetConf(bytes []byte) (*NetConf, string, error) {
+func loadNetConf(bytes []byte, envArgs string) (*NetConf, string, error) {
 	n := &NetConf{
 		BrName: defaultBrName,
 	}
@@ -80,6 +101,26 @@ func loadNetConf(bytes []byte) (*NetConf, string, error) {
 	if n.Vlan < 0 || n.Vlan > 4094 {
 		return nil, "", fmt.Errorf("invalid VLAN ID %d (must be between 0 and 4094)", n.Vlan)
 	}
+
+	if envArgs != "" {
+		e := MacEnvArgs{}
+		if err := types.LoadArgs(envArgs, &e); err != nil {
+			return nil, "", err
+		}
+
+		if e.MAC != "" {
+			n.mac = string(e.MAC)
+		}
+	}
+
+	if mac := n.Args.Cni.Mac; mac != "" {
+		n.mac = mac
+	}
+
+	if mac := n.RuntimeConfig.Mac; mac != "" {
+		n.mac = mac
+	}
+
 	return n, n.CNIVersion, nil
 }
 
@@ -273,7 +314,7 @@ func ensureVlanInterface(br *netlink.Bridge, vlanId int) (netlink.Link, error) {
 			return nil, fmt.Errorf("faild to find host namespace: %v", err)
 		}
 
-		_, brGatewayIface, err := setupVeth(hostNS, br, name, br.MTU, false, vlanId)
+		_, brGatewayIface, err := setupVeth(hostNS, br, name, br.MTU, false, vlanId, "")
 		if err != nil {
 			return nil, fmt.Errorf("faild to create vlan gateway %q: %v", name, err)
 		}
@@ -282,18 +323,23 @@ func ensureVlanInterface(br *netlink.Bridge, vlanId int) (netlink.Link, error) {
 		if err != nil {
 			return nil, fmt.Errorf("failed to lookup %q: %v", brGatewayIface.Name, err)
 		}
+
+		err = netlink.LinkSetUp(brGatewayVeth)
+		if err != nil {
+			return nil, fmt.Errorf("failed to up %q: %v", brGatewayIface.Name, err)
+		}
 	}
 
 	return brGatewayVeth, nil
 }
 
-func setupVeth(netns ns.NetNS, br *netlink.Bridge, ifName string, mtu int, hairpinMode bool, vlanID int) (*current.Interface, *current.Interface, error) {
+func setupVeth(netns ns.NetNS, br *netlink.Bridge, ifName string, mtu int, hairpinMode bool, vlanID int, mac string) (*current.Interface, *current.Interface, error) {
 	contIface := &current.Interface{}
 	hostIface := &current.Interface{}
 
 	err := netns.Do(func(hostNS ns.NetNS) error {
 		// create the veth pair in the container and move host end into host netns
-		hostVeth, containerVeth, err := ip.SetupVeth(ifName, mtu, hostNS)
+		hostVeth, containerVeth, err := ip.SetupVeth(ifName, mtu, mac, hostNS)
 		if err != nil {
 			return err
 		}
@@ -356,20 +402,6 @@ func setupBridge(n *NetConf) (*netlink.Bridge, *current.Interface, error) {
 	}, nil
 }
 
-// disableIPV6DAD disables IPv6 Duplicate Address Detection (DAD)
-// for an interface, if the interface does not support enhanced_dad.
-// We do this because interfaces with hairpin mode will see their own DAD packets
-func disableIPV6DAD(ifName string) error {
-	// ehanced_dad sends a nonce with the DAD packets, so that we can safely
-	// ignore ourselves
-	enh, err := ioutil.ReadFile(fmt.Sprintf("/proc/sys/net/ipv6/conf/%s/enhanced_dad", ifName))
-	if err == nil && string(enh) == "1\n" {
-		return nil
-	}
-	f := fmt.Sprintf("/proc/sys/net/ipv6/conf/%s/accept_dad", ifName)
-	return ioutil.WriteFile(f, []byte("0"), 0644)
-}
-
 func enableIPForward(family int) error {
 	if family == netlink.FAMILY_V4 {
 		return ip.EnableIP4Forward()
@@ -380,7 +412,7 @@ func enableIPForward(family int) error {
 func cmdAdd(args *skel.CmdArgs) error {
 	var success bool = false
 
-	n, cniVersion, err := loadNetConf(args.StdinData)
+	n, cniVersion, err := loadNetConf(args.StdinData, args.Args)
 	if err != nil {
 		return err
 	}
@@ -392,7 +424,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 
 	if n.HairpinMode && n.PromiscMode {
-		return fmt.Errorf("cannot set hairpin mode and promiscous mode at the same time.")
+		return fmt.Errorf("cannot set hairpin mode and promiscuous mode at the same time.")
 	}
 
 	br, brInterface, err := setupBridge(n)
@@ -406,7 +438,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 	defer netns.Close()
 
-	hostInterface, containerInterface, err := setupVeth(netns, br, args.IfName, n.MTU, n.HairpinMode, n.Vlan)
+	hostInterface, containerInterface, err := setupVeth(netns, br, args.IfName, n.MTU, n.HairpinMode, n.Vlan, n.mac)
 	if err != nil {
 		return err
 	}
@@ -421,6 +453,20 @@ func cmdAdd(args *skel.CmdArgs) error {
 		},
 	}
 
+	if n.MacSpoofChk {
+		sc := link.NewSpoofChecker(hostInterface.Name, containerInterface.Mac, uniqueID(args.ContainerID, args.IfName))
+		if err := sc.Setup(); err != nil {
+			return err
+		}
+		defer func() {
+			if !success {
+				if err := sc.Teardown(); err != nil {
+					fmt.Fprintf(os.Stderr, "%v", err)
+				}
+			}
+		}()
+	}
+
 	if isLayer3 {
 		// run the IPAM plugin and get back the config to apply
 		r, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData)
@@ -456,17 +502,13 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 		// Configure the container hardware address and IP address(es)
 		if err := netns.Do(func(_ ns.NetNS) error {
-			// Disable IPv6 DAD just in case hairpin mode is enabled on the
+			if n.EnableDad {
-			// bridge. Hairpin mode causes echos of neighbor solicitation
+				_, _ = sysctl.Sysctl(fmt.Sprintf("/net/ipv6/conf/%s/enhanced_dad", args.IfName), "1")
-			// packets, which causes DAD failures.
+				_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv6/conf/%s/accept_dad", args.IfName), "1")
-			for _, ipc := range result.IPs {
+			} else {
-				if ipc.Address.IP.To4() == nil && (n.HairpinMode || n.PromiscMode) {
+				_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv6/conf/%s/accept_dad", args.IfName), "0")
-					if err := disableIPV6DAD(args.IfName); err != nil {
-						return err
-					}
-					break
-				}
 			}
+			_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv4/conf/%s/arp_notify", args.IfName), "1")
 
 			// Add the IP to the interface
 			if err := ipam.ConfigureIface(args.IfName, result); err != nil {
@@ -495,23 +537,6 @@ func cmdAdd(args *skel.CmdArgs) error {
 			}
 		}
 
-		// Send a gratuitous arp
-		if err := netns.Do(func(_ ns.NetNS) error {
-			contVeth, err := net.InterfaceByName(args.IfName)
-			if err != nil {
-				return err
-			}
-
-			for _, ipc := range result.IPs {
-				if ipc.Address.IP.To4() != nil {
-					_ = arping.GratuitousArpOverIface(ipc.Address.IP, *contVeth)
-				}
-			}
-			return nil
-		}); err != nil {
-			return err
-		}
-
 		if n.IsGW {
 			var firstV4Addr net.IP
 			var vlanInterface *current.Interface
@@ -562,6 +587,20 @@ func cmdAdd(args *skel.CmdArgs) error {
 				}
 			}
 		}
+	} else {
+		if err := netns.Do(func(_ ns.NetNS) error {
+			link, err := netlink.LinkByName(args.IfName)
+			if err != nil {
+				return fmt.Errorf("failed to retrieve link: %v", err)
+			}
+			// If layer 2 we still need to set the container veth to up
+			if err = netlink.LinkSetUp(link); err != nil {
+				return fmt.Errorf("failed to set %q up: %v", args.IfName, err)
+			}
+			return nil
+		}); err != nil {
+			return err
+		}
 	}
 
 	// Refetch the bridge since its MAC address may change when the first
@@ -585,7 +624,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 }
 
 func cmdDel(args *skel.CmdArgs) error {
-	n, _, err := loadNetConf(args.StdinData)
+	n, _, err := loadNetConf(args.StdinData, args.Args)
 	if err != nil {
 		return err
 	}
@@ -616,9 +655,23 @@ func cmdDel(args *skel.CmdArgs) error {
 	})
 
 	if err != nil {
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
 		return err
 	}
 
+	if n.MacSpoofChk {
+		sc := link.NewSpoofChecker("", "", uniqueID(args.ContainerID, args.IfName))
+		if err := sc.Teardown(); err != nil {
+			fmt.Fprintf(os.Stderr, "%v", err)
+		}
+	}
+
 	if isLayer3 && n.IPMasq {
 		chain := utils.FormatChainName(n.Name, args.ContainerID)
 		comment := utils.FormatComment(n.Name, args.ContainerID)
@@ -776,7 +829,7 @@ func validateCniContainerInterface(intf current.Interface) (cniBridgeIf, error)
 
 func cmdCheck(args *skel.CmdArgs) error {
 
-	n, _, err := loadNetConf(args.StdinData)
+	n, _, err := loadNetConf(args.StdinData, args.Args)
 	if err != nil {
 		return err
 	}
@@ -899,3 +952,7 @@ func cmdCheck(args *skel.CmdArgs) error {
 
 	return nil
 }
+
+func uniqueID(containerID, cniIface string) string {
+	return containerID + "-" + cniIface
+}

plugins/main/bridge/bridge_test.go

@@ -23,12 +23,13 @@ import (
 	"strings"
 
 	"github.com/coreos/go-iptables/iptables"
+	"github.com/networkplumbing/go-nft/nft"
 	"github.com/vishvananda/netlink/nl"
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/040"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ip"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
@@ -74,10 +75,26 @@ type testCase struct {
 	expGWCIDRs  []string // Expected gateway addresses in CIDR form
 	vlan        int
 	ipMasq      bool
+	macspoofchk bool
 	AddErr020   string
 	DelErr020   string
 	AddErr010   string
 	DelErr010   string
+
+	envArgs       string // CNI_ARGS
+	runtimeConfig struct {
+		mac string
+	}
+	args struct {
+		cni struct {
+			mac string
+		}
+	}
+
+	// Unlike the parameters above, the following parameters
+	// are expected values to be checked against.
+	// e.g. the mac address has several sources: CNI_ARGS, Args and RuntimeConfig.
+	expectedMac string
 }
 
 // Range definition for each entry in the ranges list
@@ -148,6 +165,21 @@ const (
 
 	ipamEndStr = `
     }`
+
+	macspoofchkFormat = `,
+        "macspoofchk": %t`
+
+	argsFormat = `,
+    "args": {
+        "cni": {
+            "mac": %q
+        }
+    }`
+
+	runtimeConfig = `,
+    "RuntimeConfig": {
+        "mac": %q
+    }`
 )
 
 // netConfJSON() generates a JSON network configuration string
@@ -160,6 +192,15 @@ func (tc testCase) netConfJSON(dataDir string) string {
 	if tc.ipMasq {
 		conf += tc.ipMasqConfig()
 	}
+	if tc.args.cni.mac != "" {
+		conf += fmt.Sprintf(argsFormat, tc.args.cni.mac)
+	}
+	if tc.runtimeConfig.mac != "" {
+		conf += fmt.Sprintf(runtimeConfig, tc.runtimeConfig.mac)
+	}
+	if tc.macspoofchk {
+		conf += fmt.Sprintf(macspoofchkFormat, tc.macspoofchk)
+	}
 
 	if !tc.isLayer2 {
 		conf += netDefault
@@ -223,6 +264,7 @@ func (tc testCase) createCmdArgs(targetNS ns.NetNS, dataDir string) *skel.CmdArg
 		Netns:       targetNS.Path(),
 		IfName:      IFNAME,
 		StdinData:   []byte(conf),
+		Args:        tc.envArgs,
 	}
 }
 
@@ -428,7 +470,10 @@ func (tester *testerV10x) cmdAddTest(tc testCase, dataDir string) (types.Result,
 		Expect(result.Interfaces[1].Mac).To(HaveLen(17))
 
 		Expect(result.Interfaces[2].Name).To(Equal(IFNAME))
-		Expect(result.Interfaces[2].Mac).To(HaveLen(17)) //mac is random
+		Expect(result.Interfaces[2].Mac).To(HaveLen(17))
+		if tc.expectedMac != "" {
+			Expect(result.Interfaces[2].Mac).To(Equal(tc.expectedMac))
+		}
 		Expect(result.Interfaces[2].Sandbox).To(Equal(tester.targetNS.Path()))
 
 		// Make sure bridge link exists
@@ -725,7 +770,10 @@ func (tester *testerV04x) cmdAddTest(tc testCase, dataDir string) (types.Result,
 		Expect(result.Interfaces[1].Mac).To(HaveLen(17))
 
 		Expect(result.Interfaces[2].Name).To(Equal(IFNAME))
-		Expect(result.Interfaces[2].Mac).To(HaveLen(17)) //mac is random
+		Expect(result.Interfaces[2].Mac).To(HaveLen(17))
+		if tc.expectedMac != "" {
+			Expect(result.Interfaces[2].Mac).To(Equal(tc.expectedMac))
+		}
 		Expect(result.Interfaces[2].Sandbox).To(Equal(tester.targetNS.Path()))
 
 		// Make sure bridge link exists
@@ -1022,7 +1070,10 @@ func (tester *testerV03x) cmdAddTest(tc testCase, dataDir string) (types.Result,
 		Expect(result.Interfaces[1].Mac).To(HaveLen(17))
 
 		Expect(result.Interfaces[2].Name).To(Equal(IFNAME))
-		Expect(result.Interfaces[2].Mac).To(HaveLen(17)) //mac is random
+		Expect(result.Interfaces[2].Mac).To(HaveLen(17))
+		if tc.expectedMac != "" {
+			Expect(result.Interfaces[2].Mac).To(Equal(tc.expectedMac))
+		}
 		Expect(result.Interfaces[2].Sandbox).To(Equal(tester.targetNS.Path()))
 
 		// Make sure bridge link exists
@@ -1967,6 +2018,66 @@ var _ = Describe("bridge Operations", func() {
 			})
 		}
 
+		It(fmt.Sprintf("[%s] uses an explicit MAC addresses for the container iface (from CNI_ARGS)", ver), func() {
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				const expectedMac = "02:00:00:00:00:00"
+				tc := testCase{
+					cniVersion: ver,
+					subnet:     "10.1.2.0/24",
+					envArgs:    "MAC=" + expectedMac,
+
+					expectedMac: expectedMac,
+				}
+				cmdAddDelTest(originalNS, targetNS, tc, dataDir)
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] uses an explicit MAC addresses for the container iface (from Args)", ver), func() {
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				const expectedMac = "02:00:00:00:00:00"
+				tc := testCase{
+					cniVersion: ver,
+					subnet:     "10.1.2.0/24",
+					envArgs:    "MAC=" + "02:00:00:00:04:56",
+
+					expectedMac: expectedMac,
+				}
+				tc.args.cni.mac = expectedMac
+				cmdAddDelTest(originalNS, targetNS, tc, dataDir)
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] uses an explicit MAC addresses for the container iface (from RuntimeConfig)", ver), func() {
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				const expectedMac = "02:00:00:00:00:00"
+				tc := testCase{
+					cniVersion: ver,
+					subnet:     "10.1.2.0/24",
+					envArgs:    "MAC=" + "02:00:00:00:04:56",
+
+					expectedMac: expectedMac,
+				}
+				tc.args.cni.mac = "02:00:00:00:07:89"
+				tc.runtimeConfig.mac = expectedMac
+				cmdAddDelTest(originalNS, targetNS, tc, dataDir)
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
 		It(fmt.Sprintf("[%s] checks ip release in case of error", ver), func() {
 			err := originalNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
@@ -2072,6 +2183,35 @@ var _ = Describe("bridge Operations", func() {
 				})
 			}
 		}
+
+		It(fmt.Sprintf("[%s] configures mac spoof-check (no mac spoofing)", ver), func() {
+			Expect(originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				tc := testCase{
+					cniVersion:  ver,
+					subnet:      "10.1.2.0/24",
+					macspoofchk: true,
+				}
+				args := tc.createCmdArgs(originalNS, dataDir)
+				_, _, err := testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+
+				assertMacSpoofCheckRulesExist()
+
+				Expect(testutils.CmdDelWithArgs(args, func() error {
+					if err := cmdDel(args); err != nil {
+						return err
+					}
+					assertMacSpoofCheckRulesMissing()
+					return nil
+				})).To(Succeed())
+
+				return nil
+			})).To(Succeed())
+		})
 	}
 
 	It("check vlan id when loading net conf", func() {
@@ -2099,7 +2239,7 @@ var _ = Describe("bridge Operations", func() {
 		tests = append(tests, createCaseFn("0.4.0", 5000, fmt.Errorf("invalid VLAN ID 5000 (must be between 0 and 4094)")))
 
 		for _, test := range tests {
-			_, _, err := loadNetConf([]byte(test.netConfJSON("")))
+			_, _, err := loadNetConf([]byte(test.netConfJSON("")), "")
 			if test.err == nil {
 				Expect(err).To(BeNil())
 			} else {
@@ -2108,3 +2248,50 @@ var _ = Describe("bridge Operations", func() {
 		}
 	})
 })
+
+func assertMacSpoofCheckRulesExist() {
+	assertMacSpoofCheckRules(
+		func(actual interface{}, expectedLen int) {
+			ExpectWithOffset(3, actual).To(HaveLen(expectedLen))
+		})
+}
+
+func assertMacSpoofCheckRulesMissing() {
+	assertMacSpoofCheckRules(
+		func(actual interface{}, _ int) {
+			ExpectWithOffset(3, actual).To(BeEmpty())
+		})
+}
+
+func assertMacSpoofCheckRules(assert func(actual interface{}, expectedLen int)) {
+	c, err := nft.ReadConfig()
+	ExpectWithOffset(2, err).NotTo(HaveOccurred())
+
+	expectedTable := nft.NewTable("nat", "bridge")
+	filter := nft.TypeFilter
+	hook := nft.HookPreRouting
+	prio := -300
+	policy := nft.PolicyAccept
+	expectedBaseChain := nft.NewChain(expectedTable, "PREROUTING", &filter, &hook, &prio, &policy)
+
+	assert(c.LookupRule(nft.NewRule(
+		expectedTable,
+		expectedBaseChain,
+		nil, nil, nil,
+		"macspoofchk-dummy-0-eth0",
+	)), 1)
+
+	assert(c.LookupRule(nft.NewRule(
+		expectedTable,
+		nft.NewRegularChain(expectedTable, "cni-br-iface-dummy-0-eth0"),
+		nil, nil, nil,
+		"macspoofchk-dummy-0-eth0",
+	)), 1)
+
+	assert(c.LookupRule(nft.NewRule(
+		expectedTable,
+		nft.NewRegularChain(expectedTable, "cni-br-iface-dummy-0-eth0-mac"),
+		nil, nil, nil,
+		"macspoofchk-dummy-0-eth0",
+	)), 2)
+}

plugins/main/host-device/host-device.go

@@ -39,7 +39,7 @@ import (
 	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
 )
 
-const (
+var (
 	sysBusPCI = "/sys/bus/pci/devices"
 )
 
@@ -51,6 +51,7 @@ type NetConf struct {
 	types.NetConf
 	Device        string `json:"device"` // Device-Name, something like eth0 or can0 etc.
 	HWAddr        string `json:"hwaddr"` // MAC Address of target network interface
+	DPDKMode      bool
 	KernelPath    string `json:"kernelpath"` // Kernelpath of the device
 	PCIAddr       string `json:"pciBusID"`   // PCI Address of target network device
 	RuntimeConfig struct {
@@ -67,7 +68,8 @@ func init() {
 
 func loadConf(bytes []byte) (*NetConf, error) {
 	n := &NetConf{}
-	if err := json.Unmarshal(bytes, n); err != nil {
+	var err error
+	if err = json.Unmarshal(bytes, n); err != nil {
 		return nil, fmt.Errorf("failed to load netconf: %v", err)
 	}
 
@@ -80,6 +82,13 @@ func loadConf(bytes []byte) (*NetConf, error) {
 		return nil, fmt.Errorf(`specify either "device", "hwaddr", "kernelpath" or "pciBusID"`)
 	}
 
+	if len(n.PCIAddr) > 0 {
+		n.DPDKMode, err = hasDpdkDriver(n.PCIAddr)
+		if err != nil {
+			return nil, fmt.Errorf("error with host device: %v", err)
+		}
+	}
+
 	return n, nil
 }
 
@@ -94,29 +103,34 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 	defer containerNs.Close()
 
-	if len(cfg.PCIAddr) > 0 {
+	result := &current.Result{}
-		isDpdkMode, err := hasDpdkDriver(cfg.PCIAddr)
+	var contDev netlink.Link
-		if err != nil {
+	if !cfg.DPDKMode {
-			return fmt.Errorf("error with host device: %v", err)
-		}
-		if isDpdkMode {
-			return types.PrintResult(&current.Result{}, cfg.CNIVersion)
-		}
-	}
-
 		hostDev, err := getLink(cfg.Device, cfg.HWAddr, cfg.KernelPath, cfg.PCIAddr)
 		if err != nil {
 			return fmt.Errorf("failed to find host device: %v", err)
 		}
 
-	contDev, err := moveLinkIn(hostDev, containerNs, args.IfName)
+		contDev, err = moveLinkIn(hostDev, containerNs, args.IfName)
 		if err != nil {
 			return fmt.Errorf("failed to move link %v", err)
 		}
 
-	var result *current.Result
+		result.Interfaces = []*current.Interface{{
+			Name:    contDev.Attrs().Name,
+			Mac:     contDev.Attrs().HardwareAddr.String(),
+			Sandbox: containerNs.Path(),
+		}}
+	}
+
+	if cfg.IPAM.Type == "" {
+		if cfg.DPDKMode {
+			return types.PrintResult(result, cfg.CNIVersion)
+		}
+		return printLink(contDev, cfg.CNIVersion, containerNs)
+	}
+
 	// run the IPAM plugin and get back the config to apply
-	if cfg.IPAM.Type != "" {
 	r, err := ipam.ExecAdd(cfg.IPAM.Type, args.StdinData)
 	if err != nil {
 		return err
@@ -130,27 +144,25 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}()
 
 	// Convert whatever the IPAM result was into the current Result type
-		result, err = current.NewResultFromResult(r)
+	newResult, err := current.NewResultFromResult(r)
 	if err != nil {
 		return err
 	}
 
-		if len(result.IPs) == 0 {
+	if len(newResult.IPs) == 0 {
 		return errors.New("IPAM plugin returned missing IP config")
 	}
 
-		result.Interfaces = []*current.Interface{{
+	for _, ipc := range newResult.IPs {
-			Name:    contDev.Attrs().Name,
-			Mac:     contDev.Attrs().HardwareAddr.String(),
-			Sandbox: containerNs.Path(),
-		}}
-		for _, ipc := range result.IPs {
 		// All addresses apply to the container interface (move from host)
 		ipc.Interface = current.Int(0)
 	}
 
+	newResult.Interfaces = result.Interfaces
+
+	if !cfg.DPDKMode {
 		err = containerNs.Do(func(_ ns.NetNS) error {
-			if err := ipam.ConfigureIface(args.IfName, result); err != nil {
+			if err := ipam.ConfigureIface(args.IfName, newResult); err != nil {
 				return err
 			}
 			return nil
@@ -158,13 +170,11 @@ func cmdAdd(args *skel.CmdArgs) error {
 		if err != nil {
 			return err
 		}
-
-		result.DNS = cfg.DNS
-
-		return types.PrintResult(result, cfg.CNIVersion)
 	}
 
-	return printLink(contDev, cfg.CNIVersion, containerNs)
+	newResult.DNS = cfg.DNS
+
+	return types.PrintResult(newResult, cfg.CNIVersion)
 }
 
 func cmdDel(args *skel.CmdArgs) error {
@@ -181,26 +191,18 @@ func cmdDel(args *skel.CmdArgs) error {
 	}
 	defer containerNs.Close()
 
-	if len(cfg.PCIAddr) > 0 {
-		isDpdkMode, err := hasDpdkDriver(cfg.PCIAddr)
-		if err != nil {
-			return fmt.Errorf("error with host device: %v", err)
-		}
-		if isDpdkMode {
-			return nil
-		}
-	}
-
-	if err := moveLinkOut(containerNs, args.IfName); err != nil {
-		return err
-	}
-
 	if cfg.IPAM.Type != "" {
 		if err := ipam.ExecDel(cfg.IPAM.Type, args.StdinData); err != nil {
 			return err
 		}
 	}
 
+	if !cfg.DPDKMode {
+		if err := moveLinkOut(containerNs, args.IfName); err != nil {
+			return err
+		}
+	}
+
 	return nil
 }
 
@@ -228,6 +230,10 @@ func moveLinkIn(hostDev netlink.Link, containerNs ns.NetNS, ifName string) (netl
 		if err := netlink.LinkSetName(contDev, ifName); err != nil {
 			return fmt.Errorf("failed to rename device %q to %q: %v", hostDev.Attrs().Name, ifName, err)
 		}
+		// Bring container device up
+		if err = netlink.LinkSetUp(contDev); err != nil {
+			return fmt.Errorf("failed to set %q up: %v", ifName, err)
+		}
 		// Retrieve link again to get up-to-date name and attributes
 		contDev, err = netlink.LinkByName(ifName)
 		if err != nil {
@@ -259,17 +265,21 @@ func moveLinkOut(containerNs ns.NetNS, ifName string) error {
 			return fmt.Errorf("failed to set %q down: %v", ifName, err)
 		}
 
-		// Rename device to it's original name
+		defer func() {
+			// If moving the device to the host namespace fails, set its name back to ifName so that this
+			// function can be retried. Also bring the device back up, unless it was already down before.
+			if err != nil {
+				_ = netlink.LinkSetName(dev, ifName)
+				if dev.Attrs().Flags&net.FlagUp == net.FlagUp {
+					_ = netlink.LinkSetUp(dev)
+				}
+			}
+		}()
+
+		// Rename the device to its original name from the host namespace
 		if err = netlink.LinkSetName(dev, dev.Attrs().Alias); err != nil {
 			return fmt.Errorf("failed to restore %q to original name %q: %v", ifName, dev.Attrs().Alias, err)
 		}
-		defer func() {
-			if err != nil {
-				// if moving device to host namespace fails, we should revert device name
-				// to ifName to make sure that device can be found in retries
-				_ = netlink.LinkSetName(dev, ifName)
-			}
-		}()
 
 		if err = netlink.LinkSetNsFd(dev, int(defaultNs.Fd())); err != nil {
 			return fmt.Errorf("failed to move %q to host netns: %v", dev.Attrs().Alias, err)
@@ -410,6 +420,10 @@ func cmdCheck(args *skel.CmdArgs) error {
 		return err
 	}
 
+	if cfg.DPDKMode {
+		return nil
+	}
+
 	var contMap current.Interface
 	// Find interfaces for name we know, that of host-device inside container
 	for _, intf := range result.Interfaces {

plugins/main/host-device/host-device_test.go

@@ -17,14 +17,17 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"io/ioutil"
 	"math/rand"
 	"net"
+	"os"
+	"path"
 	"strings"
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/040"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/cni/pkg/version"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
@@ -217,6 +220,7 @@ func buildOneConfig(name, cniVersion string, orig *Net, prevResult types.Result)
 
 type tester interface {
 	expectInterfaces(result types.Result, name, mac, sandbox string)
+	expectDpdkInterfaceIP(result types.Result, ipAddress string)
 }
 
 type testerBase struct{}
@@ -252,6 +256,15 @@ func (t *testerV10x) expectInterfaces(result types.Result, name, mac, sandbox st
 	}))
 }
 
+func (t *testerV10x) expectDpdkInterfaceIP(result types.Result, ipAddress string) {
+	// check that the result was sane
+	res, err := types100.NewResultFromResult(result)
+	Expect(err).NotTo(HaveOccurred())
+	Expect(len(res.Interfaces)).To(Equal(0))
+	Expect(len(res.IPs)).To(Equal(1))
+	Expect(res.IPs[0].Address.String()).To(Equal(ipAddress))
+}
+
 func (t *testerV04x) expectInterfaces(result types.Result, name, mac, sandbox string) {
 	// check that the result was sane
 	res, err := types040.NewResultFromResult(result)
@@ -265,6 +278,15 @@ func (t *testerV04x) expectInterfaces(result types.Result, name, mac, sandbox st
 	}))
 }
 
+func (t *testerV04x) expectDpdkInterfaceIP(result types.Result, ipAddress string) {
+	// check that the result was sane
+	res, err := types040.NewResultFromResult(result)
+	Expect(err).NotTo(HaveOccurred())
+	Expect(len(res.Interfaces)).To(Equal(0))
+	Expect(len(res.IPs)).To(Equal(1))
+	Expect(res.IPs[0].Address.String()).To(Equal(ipAddress))
+}
+
 func (t *testerV03x) expectInterfaces(result types.Result, name, mac, sandbox string) {
 	// check that the result was sane
 	res, err := types040.NewResultFromResult(result)
@@ -278,6 +300,15 @@ func (t *testerV03x) expectInterfaces(result types.Result, name, mac, sandbox st
 	}))
 }
 
+func (t *testerV03x) expectDpdkInterfaceIP(result types.Result, ipAddress string) {
+	// check that the result was sane
+	res, err := types040.NewResultFromResult(result)
+	Expect(err).NotTo(HaveOccurred())
+	Expect(len(res.Interfaces)).To(Equal(0))
+	Expect(len(res.IPs)).To(Equal(1))
+	Expect(res.IPs[0].Address.String()).To(Equal(ipAddress))
+}
+
 var _ = Describe("base functionality", func() {
 	var originalNS, targetNS ns.NetNS
 	var ifname string
@@ -350,12 +381,13 @@ var _ = Describe("base functionality", func() {
 			t := newTesterByVersion(ver)
 			t.expectInterfaces(resI, cniName, origLink.Attrs().HardwareAddr.String(), targetNS.Path())
 
-			// assert that dummy0 is now in the target namespace
+			// assert that dummy0 is now in the target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 				return nil
 			})
 
@@ -430,12 +462,13 @@ var _ = Describe("base functionality", func() {
 			t := newTesterByVersion(ver)
 			t.expectInterfaces(resI, cniName, origLink.Attrs().HardwareAddr.String(), targetNS.Path())
 
-			// assert that dummy0 is now in the target namespace
+			// assert that dummy0 is now in the target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 				return nil
 			})
 
@@ -473,12 +506,13 @@ var _ = Describe("base functionality", func() {
 				return nil
 			})
 
-			// assert container interface "eth0" still exists in target namespace
+			// assert container interface "eth0" still exists in target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 				return nil
 			})
 
@@ -509,6 +543,65 @@ var _ = Describe("base functionality", func() {
 			})
 		})
 
+		It(fmt.Sprintf("Works with a valid %s config on a DPDK device with IPAM", ver), func() {
+			fs := &fakeFilesystem{
+				dirs: []string{
+					"sys/bus/pci/devices/0000:00:00.1",
+					"sys/bus/pci/drivers/vfio-pci",
+				},
+				symlinks: map[string]string{
+					"sys/bus/pci/devices/0000:00:00.1/driver": "../../../../bus/pci/drivers/vfio-pci",
+				},
+			}
+			defer fs.use()()
+
+			// call CmdAdd
+			targetIP := "10.10.0.1/24"
+			cniName := "eth0"
+			conf := fmt.Sprintf(`{
+							"cniVersion": "%s",
+							"name": "cni-plugin-host-device-test",
+							"type": "host-device",
+							"ipam": {
+								"type": "static",
+								"addresses": [
+									{
+									"address":"`+targetIP+`",
+									"gateway": "10.10.0.254"
+								}]
+							},
+							"pciBusID": %q
+						}`, ver, "0000:00:00.1")
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				IfName:      cniName,
+				Netns:       targetNS.Path(),
+				StdinData:   []byte(conf),
+			}
+			var resI types.Result
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+				var err error
+				resI, _, err = testutils.CmdAddWithArgs(args, func() error { return cmdAdd(args) })
+				return err
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			// check that the result was sane
+			t := newTesterByVersion(ver)
+			t.expectDpdkInterfaceIP(resI, targetIP)
+
+			// call CmdDel
+			_ = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+				err = testutils.CmdDelWithArgs(args, func() error {
+					return cmdDel(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+				return nil
+			})
+		})
+
 		It(fmt.Sprintf("Works with a valid %s config with IPAM", ver), func() {
 			var origLink netlink.Link
 
@@ -564,12 +657,13 @@ var _ = Describe("base functionality", func() {
 			t := newTesterByVersion(ver)
 			t.expectInterfaces(resI, cniName, origLink.Attrs().HardwareAddr.String(), targetNS.Path())
 
-			// assert that dummy0 is now in the target namespace
+			// assert that dummy0 is now in the target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 
 				//get the IP address of the interface in the target namespace
 				addrs, err := netlink.AddrList(link, netlink.FAMILY_V4)
@@ -667,12 +761,13 @@ var _ = Describe("base functionality", func() {
 			t := newTesterByVersion(ver)
 			t.expectInterfaces(resI, cniName, origLink.Attrs().HardwareAddr.String(), targetNS.Path())
 
-			// assert that dummy0 is now in the target namespace
+			// assert that dummy0 is now in the target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 				return nil
 			})
 
@@ -721,6 +816,89 @@ var _ = Describe("base functionality", func() {
 			})
 		})
 
+		It(fmt.Sprintf("Works with a valid %s config on a DPDK device with IPAM", ver), func() {
+			fs := &fakeFilesystem{
+				dirs: []string{
+					"sys/bus/pci/devices/0000:00:00.1",
+					"sys/bus/pci/drivers/vfio-pci",
+				},
+				symlinks: map[string]string{
+					"sys/bus/pci/devices/0000:00:00.1/driver": "../../../../bus/pci/drivers/vfio-pci",
+				},
+			}
+			defer fs.use()()
+
+			// call CmdAdd
+			targetIP := "10.10.0.1/24"
+			cniName := "eth0"
+			conf := fmt.Sprintf(`{
+							"cniVersion": "%s",
+							"name": "cni-plugin-host-device-test",
+							"type": "host-device",
+							"ipam": {
+								"type": "static",
+								"addresses": [
+									{
+									"address":"`+targetIP+`",
+									"gateway": "10.10.0.254"
+								}]
+							},
+							"pciBusID": %q
+						}`, ver, "0000:00:00.1")
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       targetNS.Path(),
+				IfName:      cniName,
+				StdinData:   []byte(conf),
+			}
+			var resI types.Result
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+				var err error
+				resI, _, err = testutils.CmdAddWithArgs(args, func() error { return cmdAdd(args) })
+				return err
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			// check that the result was sane
+			t := newTesterByVersion(ver)
+			t.expectDpdkInterfaceIP(resI, targetIP)
+
+			// call CmdCheck
+			n := &Net{}
+			err = json.Unmarshal([]byte(conf), &n)
+			Expect(err).NotTo(HaveOccurred())
+
+			n.IPAM, _, err = LoadIPAMConfig([]byte(conf), "")
+			Expect(err).NotTo(HaveOccurred())
+
+			if testutils.SpecVersionHasCHECK(ver) {
+				newConf, err := buildOneConfig("testConfig", ver, n, resI)
+				Expect(err).NotTo(HaveOccurred())
+
+				confString, err := json.Marshal(newConf)
+				Expect(err).NotTo(HaveOccurred())
+
+				args.StdinData = confString
+
+				err = originalNS.Do(func(ns.NetNS) error {
+					defer GinkgoRecover()
+					return testutils.CmdCheckWithArgs(args, func() error { return cmdCheck(args) })
+				})
+				Expect(err).NotTo(HaveOccurred())
+			}
+
+			// call CmdDel
+			_ = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+				err = testutils.CmdDelWithArgs(args, func() error {
+					return cmdDel(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+				return nil
+			})
+		})
+
 		It(fmt.Sprintf("Works with a valid %s config with IPAM", ver), func() {
 			var origLink netlink.Link
 
@@ -776,12 +954,13 @@ var _ = Describe("base functionality", func() {
 			t := newTesterByVersion(ver)
 			t.expectInterfaces(resI, cniName, origLink.Attrs().HardwareAddr.String(), targetNS.Path())
 
-			// assert that dummy0 is now in the target namespace
+			// assert that dummy0 is now in the target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 
 				//get the IP address of the interface in the target namespace
 				addrs, err := netlink.AddrList(link, netlink.FAMILY_V4)
@@ -890,12 +1069,13 @@ var _ = Describe("base functionality", func() {
 			t := newTesterByVersion(ver)
 			t.expectInterfaces(resI, cniName, origLink.Attrs().HardwareAddr.String(), targetNS.Path())
 
-			// assert that dummy0 is now in the target namespace
+			// assert that dummy0 is now in the target namespace and is up
 			_ = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 				return nil
 			})
 
@@ -933,12 +1113,13 @@ var _ = Describe("base functionality", func() {
 				return nil
 			})
 
-			// assert container interface "eth0" still exists in target namespace
+			// assert container interface "eth0" still exists in target namespace and is up
 			err = targetNS.Do(func(ns.NetNS) error {
 				defer GinkgoRecover()
 				link, err := netlink.LinkByName(cniName)
 				Expect(err).NotTo(HaveOccurred())
 				Expect(link.Attrs().HardwareAddr).To(Equal(origLink.Attrs().HardwareAddr))
+				Expect(link.Attrs().Flags & net.FlagUp).To(Equal(net.FlagUp))
 				return nil
 			})
 			Expect(err).NotTo(HaveOccurred())
@@ -971,3 +1152,42 @@ var _ = Describe("base functionality", func() {
 		})
 	}
 })
+
+type fakeFilesystem struct {
+	rootDir  string
+	dirs     []string
+	symlinks map[string]string
+}
+
+func (fs *fakeFilesystem) use() func() {
+	// create the new fake fs root dir in /tmp/sriov...
+	tmpDir, err := ioutil.TempDir("", "sriov")
+	if err != nil {
+		panic(fmt.Errorf("error creating fake root dir: %s", err.Error()))
+	}
+	fs.rootDir = tmpDir
+
+	for _, dir := range fs.dirs {
+		err := os.MkdirAll(path.Join(fs.rootDir, dir), 0755)
+		if err != nil {
+			panic(fmt.Errorf("error creating fake directory: %s", err.Error()))
+		}
+	}
+
+	for link, target := range fs.symlinks {
+		err = os.Symlink(target, path.Join(fs.rootDir, link))
+		if err != nil {
+			panic(fmt.Errorf("error creating fake symlink: %s", err.Error()))
+		}
+	}
+
+	sysBusPCI = path.Join(fs.rootDir, "/sys/bus/pci/devices")
+
+	return func() {
+		// remove temporary fake fs
+		err := os.RemoveAll(fs.rootDir)
+		if err != nil {
+			panic(fmt.Errorf("error tearing down fake filesystem: %s", err.Error()))
+		}
+	}
+}

plugins/main/ipvlan/ipvlan.go

@@ -31,6 +31,7 @@ import (
 	"github.com/containernetworking/plugins/pkg/ipam"
 	"github.com/containernetworking/plugins/pkg/ns"
 	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
+	"github.com/containernetworking/plugins/pkg/utils/sysctl"
 )
 
 type NetConf struct {
@@ -254,7 +255,12 @@ func cmdAdd(args *skel.CmdArgs) error {
 	result.Interfaces = []*current.Interface{ipvlanInterface}
 
 	err = netns.Do(func(_ ns.NetNS) error {
-		return ipam.ConfigureIface(args.IfName, result)
+		_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv4/conf/%s/arp_notify", args.IfName), "1")
+
+		if err := ipam.ConfigureIface(args.IfName, result); err != nil {
+			return err
+		}
+		return nil
 	})
 	if err != nil {
 		return err
@@ -294,6 +300,17 @@ func cmdDel(args *skel.CmdArgs) error {
 		return nil
 	})
 
+	if err != nil {
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
+		return err
+	}
+
 	return err
 }
 

plugins/main/loopback/loopback.go

@@ -159,7 +159,14 @@ func cmdDel(args *skel.CmdArgs) error {
 		return nil
 	})
 	if err != nil {
-		return err // not tested
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
+		return err
 	}
 
 	return nil

plugins/main/macvlan/macvlan.go

@@ -21,7 +21,6 @@ import (
 	"net"
 	"runtime"
 
-	"github.com/j-keck/arping"
 	"github.com/vishvananda/netlink"
 
 	"github.com/containernetworking/cni/pkg/skel"
@@ -33,6 +32,7 @@ import (
 	"github.com/containernetworking/plugins/pkg/ipam"
 	"github.com/containernetworking/plugins/pkg/ns"
 	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
+	"github.com/containernetworking/plugins/pkg/utils/sysctl"
 )
 
 type NetConf struct {
@@ -294,20 +294,11 @@ func cmdAdd(args *skel.CmdArgs) error {
 		}
 
 		err = netns.Do(func(_ ns.NetNS) error {
+			_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv4/conf/%s/arp_notify", args.IfName), "1")
+
 			if err := ipam.ConfigureIface(args.IfName, result); err != nil {
 				return err
 			}
-
-			contVeth, err := net.InterfaceByName(args.IfName)
-			if err != nil {
-				return fmt.Errorf("failed to look up %q: %v", args.IfName, err)
-			}
-
-			for _, ipc := range result.IPs {
-				if ipc.Address.IP.To4() != nil {
-					_ = arping.GratuitousArpOverIface(ipc.Address.IP, *contVeth)
-				}
-			}
 			return nil
 		})
 		if err != nil {
@@ -367,6 +358,17 @@ func cmdDel(args *skel.CmdArgs) error {
 		return nil
 	})
 
+	if err != nil {
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
+		return err
+	}
+
 	return err
 }
 

plugins/main/ptp/ptp.go

@@ -22,7 +22,6 @@ import (
 	"os"
 	"runtime"
 
-	"github.com/j-keck/arping"
 	"github.com/vishvananda/netlink"
 
 	"github.com/containernetworking/cni/pkg/skel"
@@ -66,7 +65,7 @@ func setupContainerVeth(netns ns.NetNS, ifName string, mtu int, pr *current.Resu
 	containerInterface := &current.Interface{}
 
 	err := netns.Do(func(hostNS ns.NetNS) error {
-		hostVeth, contVeth0, err := ip.SetupVeth(ifName, mtu, hostNS)
+		hostVeth, contVeth0, err := ip.SetupVeth(ifName, mtu, "", hostNS)
 		if err != nil {
 			return err
 		}
@@ -83,15 +82,15 @@ func setupContainerVeth(netns ns.NetNS, ifName string, mtu int, pr *current.Resu
 
 		pr.Interfaces = []*current.Interface{hostInterface, containerInterface}
 
-		if err = ipam.ConfigureIface(ifName, pr); err != nil {
-			return err
-		}
-
 		contVeth, err := net.InterfaceByName(ifName)
 		if err != nil {
 			return fmt.Errorf("failed to look up %q: %v", ifName, err)
 		}
 
+		if err = ipam.ConfigureIface(ifName, pr); err != nil {
+			return err
+		}
+
 		for _, ipc := range pr.IPs {
 			// Delete the route that was automatically added
 			route := netlink.Route{
@@ -139,13 +138,6 @@ func setupContainerVeth(netns ns.NetNS, ifName string, mtu int, pr *current.Resu
 			}
 		}
 
-		// Send a gratuitous arp for all v4 addresses
-		for _, ipc := range pr.IPs {
-			if ipc.Address.IP.To4() != nil {
-				_ = arping.GratuitousArpOverIface(ipc.Address.IP, *contVeth)
-			}
-		}
-
 		return nil
 	})
 	if err != nil {
@@ -292,6 +284,13 @@ func cmdDel(args *skel.CmdArgs) error {
 	})
 
 	if err != nil {
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
 		return err
 	}
 

plugins/main/vlan/vlan.go

@@ -213,6 +213,17 @@ func cmdDel(args *skel.CmdArgs) error {
 		return err
 	})
 
+	if err != nil {
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
+		return err
+	}
+
 	return err
 }
 

plugins/main/windows/win-bridge/sample-v1.conf

@@ -0,0 +1,42 @@
+{
+  "name": "cbr0",
+  "type": "win-bridge",
+  "dns": {
+    "nameservers": [
+      "11.0.0.10"
+    ],
+    "search": [
+      "svc.cluster.local"
+    ]
+  },
+  "policies": [
+    {
+      "name": "EndpointPolicy",
+      "value": {
+        "Type": "OutBoundNAT",
+        "ExceptionList": [
+          "192.168.0.0/16",
+          "11.0.0.0/8",
+          "10.137.196.0/23"
+        ]
+      }
+    },
+    {
+      "name": "EndpointPolicy",
+      "value": {
+        "Type": "ROUTE",
+        "DestinationPrefix": "11.0.0.0/8",
+        "NeedEncap": true
+      }
+    },
+    {
+      "name": "EndpointPolicy",
+      "value": {
+        "Type": "ROUTE",
+        "DestinationPrefix": "10.137.198.27/32",
+        "NeedEncap": true
+      }
+    }
+  ],
+  "loopbackDSR": true
+}

plugins/main/windows/win-bridge/sample-v2.conf

@@ -0,0 +1,52 @@
+{
+    "name":"cbr0",
+    "type":"flannel",
+    "delegate":{
+        "apiVersion":2,
+        "type":"win-bridge",
+        "dns":{
+            "nameservers":[
+                "11.0.0.10"
+            ],
+            "search":[
+                "svc.cluster.local"
+            ]
+        },
+        "policies":[
+            {
+                "name":"EndpointPolicy",
+                "value":{
+                    "Type":"OutBoundNAT",
+                    "Settings":{
+                        "Exceptions":[
+                            "192.168.0.0/16",
+                            "11.0.0.0/8",
+                            "10.137.196.0/23"
+                        ]
+                    }
+                }
+            },
+            {
+                "name":"EndpointPolicy",
+                "value":{
+                    "Type":"SDNRoute",
+                    "Settings":{
+                        "DestinationPrefix":"11.0.0.0/8",
+                        "NeedEncap":true
+                    }
+                }
+            },
+            {
+                "name":"EndpointPolicy",
+                "value":{
+                    "Type":"SDNRoute",
+                    "Settings":{
+                        "DestinationPrefix":"10.137.198.27/32",
+                        "NeedEncap":true
+                    }
+                }
+            }
+        ],
+        "loopbackDSR":true
+    }
+}

plugins/main/windows/win-bridge/sample.conf

@@ -1,45 +0,0 @@
-{
-    "name":"cbr0",
-    "type":"flannel",
-    "delegate":{
-        "type":"win-bridge",
-        "dns":{
-            "nameservers":[
-                "11.0.0.10"
-            ],
-            "search":[
-                "svc.cluster.local"
-            ]
-        },
-        "policies":[
-            {
-                "name":"EndpointPolicy",
-                "value":{
-                    "Type":"OutBoundNAT",
-                    "ExceptionList":[
-                        "192.168.0.0/16",
-                        "11.0.0.0/8",
-                        "10.137.196.0/23"
-                    ]
-                }
-            },
-            {
-                "name":"EndpointPolicy",
-                "value":{
-                    "Type":"ROUTE",
-                    "DestinationPrefix":"11.0.0.0/8",
-                    "NeedEncap":true
-                }
-            },
-            {
-                "name":"EndpointPolicy",
-                "value":{
-                    "Type":"ROUTE",
-                    "DestinationPrefix":"10.137.198.27/32",
-                    "NeedEncap":true
-                }
-            }
-        ],
-        "loopbackDSR": true
-    }
-}

plugins/main/windows/win-bridge/win-bridge_windows.go

@@ -55,21 +55,22 @@ func loadNetConf(bytes []byte) (*NetConf, string, error) {
 	return n, n.CNIVersion, nil
 }
 
-func ProcessEndpointArgs(args *skel.CmdArgs, n *NetConf) (*hns.EndpointInfo, error) {
+func processEndpointArgs(args *skel.CmdArgs, n *NetConf) (*hns.EndpointInfo, error) {
 	epInfo := new(hns.EndpointInfo)
 	epInfo.NetworkName = n.Name
 	epInfo.EndpointName = hns.ConstructEndpointName(args.ContainerID, args.Netns, epInfo.NetworkName)
-	// It's not necessary to have have an IPAM in windows as hns can provide IP/GW
+
+	// it's not necessary to have have an IPAM in windows as HNS can provide IP/GW
 	if n.IPAM.Type != "" {
 		r, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData)
 		if err != nil {
-			return nil, errors.Annotatef(err, "error while ipam.ExecAdd")
+			return nil, errors.Annotatef(err, "error while executing IPAM addition")
 		}
 
-		// Convert whatever the IPAM result was into the current Result type
+		// convert whatever the IPAM result was into the current result
 		result, err := current.NewResultFromResult(r)
 		if err != nil {
-			return nil, errors.Annotatef(err, "error while NewResultFromResult")
+			return nil, errors.Annotatef(err, "error while converting the result from IPAM addition")
 		} else {
 			if len(result.IPs) == 0 {
 				return nil, fmt.Errorf("IPAM plugin return is missing IP config")
@@ -81,12 +82,11 @@ func ProcessEndpointArgs(args *skel.CmdArgs, n *NetConf) (*hns.EndpointInfo, err
 			epInfo.Gateway[len(epInfo.Gateway)-1] += 2
 		}
 	}
-	// NAT based on the the configured cluster network
-	if len(n.IPMasqNetwork) != 0 {
-		n.ApplyOutboundNatPolicy(n.IPMasqNetwork)
-	}
 
-	// Add HostPort mapping if any present
+	// configure sNAT exception
+	n.ApplyOutboundNatPolicy(n.IPMasqNetwork)
+
+	// add port mapping if any present
 	n.ApplyPortMappingPolicy(n.RuntimeConfig.PortMaps)
 
 	epInfo.DNS = n.GetDNS()
@@ -98,40 +98,37 @@ func cmdHnsAdd(args *skel.CmdArgs, n *NetConf) (*current.Result, error) {
 	networkName := n.Name
 	hnsNetwork, err := hcsshim.GetHNSNetworkByName(networkName)
 	if err != nil {
-		return nil, errors.Annotatef(err, "error while GETHNSNewtorkByName(%s)", networkName)
+		return nil, errors.Annotatef(err, "error while getting network %v", networkName)
 	}
-
 	if hnsNetwork == nil {
-		return nil, fmt.Errorf("network %v not found", networkName)
+		return nil, fmt.Errorf("network %v is not found", networkName)
 	}
-
 	if !strings.EqualFold(hnsNetwork.Type, "L2Bridge") && !strings.EqualFold(hnsNetwork.Type, "L2Tunnel") {
-		return nil, fmt.Errorf("network %v is of an unexpected type: %v", networkName, hnsNetwork.Type)
+		return nil, fmt.Errorf("network %v is of unexpected type: %v", networkName, hnsNetwork.Type)
 	}
 
 	epName := hns.ConstructEndpointName(args.ContainerID, args.Netns, n.Name)
-	hnsEndpoint, err := hns.ProvisionEndpoint(epName, hnsNetwork.Id, args.ContainerID, args.Netns, func() (*hcsshim.HNSEndpoint, error) {
+	hnsEndpoint, err := hns.AddHnsEndpoint(epName, hnsNetwork.Id, args.ContainerID, args.Netns, func() (*hcsshim.HNSEndpoint, error) {
-		epInfo, err := ProcessEndpointArgs(args, n)
+		epInfo, err := processEndpointArgs(args, n)
 		if err != nil {
-			return nil, errors.Annotatef(err, "error while ProcessEndpointArgs")
+			return nil, errors.Annotate(err, "error while processing endpoint args")
 		}
 		epInfo.NetworkId = hnsNetwork.Id
 
 		hnsEndpoint, err := hns.GenerateHnsEndpoint(epInfo, &n.NetConf)
 		if err != nil {
-			return nil, errors.Annotatef(err, "error while GenerateHnsEndpoint")
+			return nil, errors.Annotate(err, "error while generating HNSEndpoint")
 		}
 		return hnsEndpoint, nil
 	})
 	if err != nil {
-		return nil, errors.Annotatef(err, "error while ProvisionEndpoint(%v,%v,%v)", epName, hnsNetwork.Id, args.ContainerID)
+		return nil, errors.Annotate(err, "error while adding HNSEndpoint")
 	}
 
-	result, err := hns.ConstructResult(hnsNetwork, hnsEndpoint)
+	result, err := hns.ConstructHnsResult(hnsNetwork, hnsEndpoint)
 	if err != nil {
-		return nil, errors.Annotatef(err, "error while constructResult")
+		return nil, errors.Annotate(err, "error while constructing HNSEndpoint addition result")
 	}
-
 	return result, nil
 }
 
@@ -139,48 +136,44 @@ func cmdHcnAdd(args *skel.CmdArgs, n *NetConf) (*current.Result, error) {
 	networkName := n.Name
 	hcnNetwork, err := hcn.GetNetworkByName(networkName)
 	if err != nil {
-		return nil, errors.Annotatef(err, "error while GetNetworkByName(%s)", networkName)
+		return nil, errors.Annotatef(err, "error while getting network %v", networkName)
 	}
-
 	if hcnNetwork == nil {
-		return nil, fmt.Errorf("network %v not found", networkName)
+		return nil, fmt.Errorf("network %v is not found", networkName)
 	}
-
 	if hcnNetwork.Type != hcn.L2Bridge && hcnNetwork.Type != hcn.L2Tunnel {
 		return nil, fmt.Errorf("network %v is of unexpected type: %v", networkName, hcnNetwork.Type)
 	}
 
 	epName := hns.ConstructEndpointName(args.ContainerID, args.Netns, n.Name)
-
 	hcnEndpoint, err := hns.AddHcnEndpoint(epName, hcnNetwork.Id, args.Netns, func() (*hcn.HostComputeEndpoint, error) {
-		epInfo, err := ProcessEndpointArgs(args, n)
+		epInfo, err := processEndpointArgs(args, n)
 		if err != nil {
-			return nil, errors.Annotatef(err, "error while ProcessEndpointArgs")
+			return nil, errors.Annotate(err, "error while processing endpoint args")
 		}
 		epInfo.NetworkId = hcnNetwork.Id
 
 		hcnEndpoint, err := hns.GenerateHcnEndpoint(epInfo, &n.NetConf)
 		if err != nil {
-			return nil, errors.Annotatef(err, "error while GenerateHcnEndpoint")
+			return nil, errors.Annotate(err, "error while generating HostComputeEndpoint")
 		}
 		return hcnEndpoint, nil
 	})
 	if err != nil {
-		return nil, errors.Annotatef(err, "error while AddHcnEndpoint(%v,%v,%v)", epName, hcnNetwork.Id, args.Netns)
+		return nil, errors.Annotate(err, "error while adding HostComputeEndpoint")
 	}
 
 	result, err := hns.ConstructHcnResult(hcnNetwork, hcnEndpoint)
 	if err != nil {
-		return nil, errors.Annotatef(err, "error while ConstructHcnResult")
+		return nil, errors.Annotate(err, "error while constructing HostComputeEndpoint addition result")
 	}
-
 	return result, nil
 }
 
 func cmdAdd(args *skel.CmdArgs) error {
 	n, cniVersion, err := loadNetConf(args.StdinData)
 	if err != nil {
-		return errors.Annotate(err, "error while loadNetConf")
+		return err
 	}
 
 	var result *current.Result
@@ -189,15 +182,11 @@ func cmdAdd(args *skel.CmdArgs) error {
 	} else {
 		result, err = cmdHnsAdd(args, n)
 	}
-
 	if err != nil {
 		ipam.ExecDel(n.IPAM.Type, args.StdinData)
-		return errors.Annotate(err, "error while executing ADD command")
+		return err
 	}
 
-	if result == nil {
-		return fmt.Errorf("result for ADD not populated correctly")
-	}
 	return types.PrintResult(result, cniVersion)
 }
 
@@ -216,9 +205,8 @@ func cmdDel(args *skel.CmdArgs) error {
 
 	if n.ApiVersion == 2 {
 		return hns.RemoveHcnEndpoint(epName)
-	} else {
-		return hns.DeprovisionEndpoint(epName, args.Netns, args.ContainerID)
 	}
+	return hns.RemoveHnsEndpoint(epName, args.Netns, args.ContainerID)
 }
 
 func cmdCheck(_ *skel.CmdArgs) error {
@@ -227,5 +215,5 @@ func cmdCheck(_ *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.PluginSupports("0.1.0", "0.2.0", "0.3.0"), bv.BuildString("win-bridge"))
+	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.All, bv.BuildString("win-bridge"))
 }

plugins/main/windows/win-overlay/sample.conf

@@ -1,36 +1,33 @@
 {
-    "cniVersion":"0.2.0",
+  "cniVersion": "0.2.0",
-    "name":"vxlan0",
+  "name": "vxlan0",
-    "type":"flannel",
+  "type": "win-overlay",
-    "delegate":{
+  "dns": {
-        "type":"win-overlay",
+    "nameservers": [
-        "dns":{
-            "nameservers":[
       "11.0.0.10"
     ],
-            "search":[
+    "search": [
       "svc.cluster.local"
     ]
   },
-        "policies":[
+  "policies": [
     {
-                "name":"EndpointPolicy",
+      "name": "EndpointPolicy",
-                "value":{
+      "value": {
-                    "Type":"OutBoundNAT",
+        "Type": "OutBoundNAT",
-                    "ExceptionList":[
+        "ExceptionList": [
           "192.168.0.0/16",
           "11.0.0.0/8"
         ]
       }
     },
     {
-                "name":"EndpointPolicy",
+      "name": "EndpointPolicy",
-                "value":{
+      "value": {
-                    "Type":"ROUTE",
+        "Type": "ROUTE",
-                    "DestinationPrefix":"11.0.0.0/8",
+        "DestinationPrefix": "11.0.0.0/8",
-                    "NeedEncap":true
+        "NeedEncap": true
       }
     }
   ]
-    }
 }

plugins/main/windows/win-overlay/win-overlay_windows.go

@@ -86,7 +86,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 	epName := hns.ConstructEndpointName(args.ContainerID, args.Netns, n.Name)
 
-	hnsEndpoint, err := hns.ProvisionEndpoint(epName, hnsNetwork.Id, args.ContainerID, args.Netns, func() (*hcsshim.HNSEndpoint, error) {
+	hnsEndpoint, err := hns.AddHnsEndpoint(epName, hnsNetwork.Id, args.ContainerID, args.Netns, func() (*hcsshim.HNSEndpoint, error) {
 		// run the IPAM plugin and get back the config to apply
 		r, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData)
 		if err != nil {
@@ -119,7 +119,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 		result.DNS = n.GetDNS()
 		if n.LoopbackDSR {
-			n.ApplyLoopbackDSR(&ipAddr)
+			n.ApplyLoopbackDSRPolicy(&ipAddr)
 		}
 		hnsEndpoint := &hcsshim.HNSEndpoint{
 			Name:           epName,
@@ -129,7 +129,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 			GatewayAddress: gw,
 			IPAddress:      ipAddr,
 			MacAddress:     macAddr,
-			Policies:       n.MarshalPolicies(),
+			Policies:       n.GetHNSEndpointPolicies(),
 		}
 
 		return hnsEndpoint, nil
@@ -140,10 +140,10 @@ func cmdAdd(args *skel.CmdArgs) error {
 		}
 	}()
 	if err != nil {
-		return errors.Annotatef(err, "error while ProvisionEndpoint(%v,%v,%v)", epName, hnsNetwork.Id, args.ContainerID)
+		return errors.Annotatef(err, "error while AddHnsEndpoint(%v,%v,%v)", epName, hnsNetwork.Id, args.ContainerID)
 	}
 
-	result, err := hns.ConstructResult(hnsNetwork, hnsEndpoint)
+	result, err := hns.ConstructHnsResult(hnsNetwork, hnsEndpoint)
 	if err != nil {
 		return errors.Annotatef(err, "error while constructResult")
 	}
@@ -164,7 +164,7 @@ func cmdDel(args *skel.CmdArgs) error {
 
 	epName := hns.ConstructEndpointName(args.ContainerID, args.Netns, n.Name)
 
-	return hns.DeprovisionEndpoint(epName, args.Netns, args.ContainerID)
+	return hns.RemoveHnsEndpoint(epName, args.Netns, args.ContainerID)
 }
 
 func cmdCheck(_ *skel.CmdArgs) error {
@@ -173,5 +173,5 @@ func cmdCheck(_ *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.PluginSupports("0.1.0", "0.2.0", "0.3.0"), bv.BuildString("win-overlay"))
+	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.All, bv.BuildString("win-overlay"))
 }

plugins/meta/bandwidth/main.go

@@ -246,7 +246,7 @@ func cmdDel(args *skel.CmdArgs) error {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.PluginSupports("0.3.0", "0.3.1", version.Current()), bv.BuildString("bandwidth"))
+	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.VersionsStartingFrom("0.3.0"), bv.BuildString("bandwidth"))
 }
 
 func SafeQdiscList(link netlink.Link) ([]netlink.Qdisc, error) {

plugins/meta/firewall/firewall.go

@@ -46,8 +46,27 @@ type FirewallNetConf struct {
 	// the firewalld backend is used but the zone is not given, it defaults
 	// to 'trusted'
 	FirewalldZone string `json:"firewalldZone,omitempty"`
+
+	// IngressPolicy is an optional ingress policy.
+	// Defaults to "open".
+	IngressPolicy IngressPolicy `json:"ingressPolicy,omitempty"`
 }
 
+// IngressPolicy is an ingress policy string.
+type IngressPolicy = string
+
+const (
+	// IngressPolicyOpen ("open"): all inbound connections to the container are accepted.
+	// IngressPolicyOpen is the default ingress policy.
+	IngressPolicyOpen IngressPolicy = "open"
+
+	// IngressPolicySameBridge ("same-bridge"): connections from the same bridge are accepted, others are blocked.
+	// This is similar to how Docker libnetwork works.
+	// IngressPolicySameBridge executes `iptables` regardless to the value of `Backend`.
+	// IngressPolicySameBridge may not work as expected for non-bridge networks.
+	IngressPolicySameBridge IngressPolicy = "same-bridge"
+)
+
 type FirewallBackend interface {
 	Add(*FirewallNetConf, *current.Result) error
 	Del(*FirewallNetConf, *current.Result) error
@@ -129,6 +148,10 @@ func cmdAdd(args *skel.CmdArgs) error {
 		return err
 	}
 
+	if err := setupIngressPolicy(conf, result); err != nil {
+		return err
+	}
+
 	if result == nil {
 		result = &current.Result{
 			CNIVersion: current.ImplementedSpecVersion,
@@ -153,11 +176,15 @@ func cmdDel(args *skel.CmdArgs) error {
 		return err
 	}
 
+	if err := teardownIngressPolicy(conf, result); err != nil {
+		return err
+	}
+
 	return nil
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.PluginSupports("0.4.0"), bv.BuildString("firewall"))
+	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.VersionsStartingFrom("0.4.0"), bv.BuildString("firewall"))
 }
 
 func cmdCheck(args *skel.CmdArgs) error {

plugins/meta/firewall/firewall_integ_test.go

@@ -0,0 +1,203 @@
+// Copyright 2022 CNI authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"github.com/containernetworking/cni/libcni"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
+	"github.com/containernetworking/plugins/pkg/ns"
+	"github.com/containernetworking/plugins/pkg/testutils"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+// The integration tests expect the "firewall" binary to be present in $PATH.
+// To run test, e.g, : go test -exec "sudo -E PATH=$(pwd):/opt/cni/bin:$PATH" -v -ginkgo.v
+var _ = Describe("firewall integration tests (ingressPolicy: same-bridge)", func() {
+	// ns0: foo (10.88.3.0/24)
+	// ns1: foo (10.88.3.0/24)
+	// ns2: bar (10.88.4.0/24)
+	//
+	// ns0@foo can talk to ns1@foo, but cannot talk to ns2@bar
+	const nsCount = 3
+	var (
+		configListFoo *libcni.NetworkConfigList // "foo", 10.88.3.0/24
+		configListBar *libcni.NetworkConfigList // "bar", 10.88.4.0/24
+		cniConf       *libcni.CNIConfig
+		namespaces    [nsCount]ns.NetNS
+	)
+
+	BeforeEach(func() {
+		var err error
+		rawConfigFoo := `
+{
+   "cniVersion": "1.0.0",
+   "name": "foo",
+   "plugins": [
+      {
+         "type": "bridge",
+         "bridge": "foo",
+         "isGateway": true,
+         "ipMasq": true,
+         "hairpinMode": true,
+         "ipam": {
+            "type": "host-local",
+            "routes": [
+               {
+                  "dst": "0.0.0.0/0"
+               }
+            ],
+            "ranges": [
+               [
+                  {
+                     "subnet": "10.88.3.0/24",
+                     "gateway": "10.88.3.1"
+                  }
+               ]
+            ]
+         }
+      },
+      {
+         "type": "firewall",
+         "backend": "iptables",
+         "ingressPolicy": "same-bridge"
+      }
+   ]
+}
+`
+		configListFoo, err = libcni.ConfListFromBytes([]byte(rawConfigFoo))
+		Expect(err).NotTo(HaveOccurred())
+
+		rawConfigBar := strings.ReplaceAll(rawConfigFoo, "foo", "bar")
+		rawConfigBar = strings.ReplaceAll(rawConfigBar, "10.88.3.", "10.88.4.")
+
+		configListBar, err = libcni.ConfListFromBytes([]byte(rawConfigBar))
+		Expect(err).NotTo(HaveOccurred())
+
+		// turn PATH in to CNI_PATH.
+		_, err = exec.LookPath("firewall")
+		Expect(err).NotTo(HaveOccurred())
+		dirs := filepath.SplitList(os.Getenv("PATH"))
+		cniConf = &libcni.CNIConfig{Path: dirs}
+
+		for i := 0; i < nsCount; i++ {
+			targetNS, err := testutils.NewNS()
+			Expect(err).NotTo(HaveOccurred())
+			fmt.Fprintf(GinkgoWriter, "namespace %d:%s\n", i, targetNS.Path())
+			namespaces[i] = targetNS
+		}
+	})
+
+	AfterEach(func() {
+		for _, targetNS := range namespaces {
+			if targetNS != nil {
+				targetNS.Close()
+			}
+		}
+	})
+
+	Describe("Testing with network foo and bar", func() {
+		It("should isolate foo from bar", func() {
+			var results [nsCount]*types100.Result
+			for i := 0; i < nsCount; i++ {
+				runtimeConfig := libcni.RuntimeConf{
+					ContainerID: fmt.Sprintf("test-cni-firewall-%d", i),
+					NetNS:       namespaces[i].Path(),
+					IfName:      "eth0",
+				}
+
+				configList := configListFoo
+				switch i {
+				case 0, 1:
+				// leave foo
+				default:
+					configList = configListBar
+				}
+
+				// Clean up garbages produced during past failed executions
+				_ = cniConf.DelNetworkList(context.TODO(), configList, &runtimeConfig)
+
+				// Make delete idempotent, so we can clean up on failure
+				netDeleted := false
+				deleteNetwork := func() error {
+					if netDeleted {
+						return nil
+					}
+					netDeleted = true
+					return cniConf.DelNetworkList(context.TODO(), configList, &runtimeConfig)
+				}
+				// Create the network
+				res, err := cniConf.AddNetworkList(context.TODO(), configList, &runtimeConfig)
+				Expect(err).NotTo(HaveOccurred())
+				// nolint: errcheck
+				defer deleteNetwork()
+
+				results[i], err = types100.NewResultFromResult(res)
+				Expect(err).NotTo(HaveOccurred())
+				fmt.Fprintf(GinkgoWriter, "results[%d]: %+v\n", i, results[i])
+			}
+			ping := func(src, dst int) error {
+				return namespaces[src].Do(func(ns.NetNS) error {
+					defer GinkgoRecover()
+					saddr := results[src].IPs[0].Address.IP.String()
+					daddr := results[dst].IPs[0].Address.IP.String()
+					srcNetName := results[src].Interfaces[0].Name
+					dstNetName := results[dst].Interfaces[0].Name
+
+					fmt.Fprintf(GinkgoWriter, "ping %s (ns%d@%s) -> %s (ns%d@%s)...",
+						saddr, src, srcNetName, daddr, dst, dstNetName)
+					timeoutSec := 1
+					if err := testutils.Ping(saddr, daddr, timeoutSec); err != nil {
+						fmt.Fprintln(GinkgoWriter, "unpingable")
+						return err
+					}
+					fmt.Fprintln(GinkgoWriter, "pingable")
+					return nil
+				})
+			}
+
+			// ns0@foo can ping to ns1@foo
+			err := ping(0, 1)
+			Expect(err).NotTo(HaveOccurred())
+
+			// ns1@foo can ping to ns0@foo
+			err = ping(1, 0)
+			Expect(err).NotTo(HaveOccurred())
+
+			// ns0@foo cannot ping to ns2@bar
+			err = ping(0, 2)
+			Expect(err).To(HaveOccurred())
+
+			// ns1@foo cannot ping to ns2@bar
+			err = ping(1, 2)
+			Expect(err).To(HaveOccurred())
+
+			// ns2@bar cannot ping to ns0@foo
+			err = ping(2, 0)
+			Expect(err).To(HaveOccurred())
+
+			// ns2@bar cannot ping to ns1@foo
+			err = ping(2, 1)
+			Expect(err).To(HaveOccurred())
+		})
+	})
+})

plugins/meta/firewall/ingresspolicy.go

@@ -0,0 +1,175 @@
+// Copyright 2022 CNI authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// This is a sample chained plugin that supports multiple CNI versions. It
+// parses prevResult according to the cniVersion
+package main
+
+import (
+	"fmt"
+
+	types100 "github.com/containernetworking/cni/pkg/types/100"
+	"github.com/containernetworking/plugins/pkg/utils"
+	"github.com/coreos/go-iptables/iptables"
+)
+
+func setupIngressPolicy(conf *FirewallNetConf, prevResult *types100.Result) error {
+	switch conf.IngressPolicy {
+	case "", IngressPolicyOpen:
+		// NOP
+		return nil
+	case IngressPolicySameBridge:
+		return setupIngressPolicySameBridge(conf, prevResult)
+	default:
+		return fmt.Errorf("unknown ingress policy: %q", conf.IngressPolicy)
+	}
+}
+
+func setupIngressPolicySameBridge(conf *FirewallNetConf, prevResult *types100.Result) error {
+	if len(prevResult.Interfaces) == 0 {
+		return fmt.Errorf("interface needs to be set for ingress policy %q, make sure to chain \"firewall\" plugin with \"bridge\"",
+			conf.IngressPolicy)
+	}
+	intf := prevResult.Interfaces[0]
+	if intf == nil {
+		return fmt.Errorf("got nil interface")
+	}
+	bridgeName := intf.Name
+	if bridgeName == "" {
+		return fmt.Errorf("got empty bridge name")
+	}
+	for _, iptProto := range findProtos(conf) {
+		ipt, err := iptables.NewWithProtocol(iptProto)
+		if err != nil {
+			return err
+		}
+		if err := setupIsolationChains(ipt, bridgeName); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func teardownIngressPolicy(conf *FirewallNetConf, prevResult *types100.Result) error {
+	switch conf.IngressPolicy {
+	case "", IngressPolicyOpen:
+		// NOP
+		return nil
+	case IngressPolicySameBridge:
+		// NOP
+		//
+		// We can't be sure whether conf.bridgeName is still in use by other containers.
+		// So we do not remove the iptable rules that are created per bridge.
+		return nil
+	default:
+		return fmt.Errorf("unknown ingress policy: %q", conf.IngressPolicy)
+	}
+}
+
+const (
+	filterTableName  = "filter"  // built-in
+	forwardChainName = "FORWARD" // built-in
+)
+
+// setupIsolationChains executes the following iptables commands for isolating networks:
+// ```
+// iptables -N CNI-ISOLATION-STAGE-1
+// iptables -N CNI-ISOLATION-STAGE-2
+// # NOTE: "-j CNI-ISOLATION-STAGE-1" needs to be before "CNI-FORWARD" chain. So we use -I here.
+// iptables -I FORWARD -j CNI-ISOLATION-STAGE-1
+// iptables -A CNI-ISOLATION-STAGE-1 -i ${bridgeName} ! -o ${bridgeName} -j CNI-ISOLATION-STAGE-2
+// iptables -A CNI-ISOLATION-STAGE-1 -j RETURN
+// iptables -A CNI-ISOLATION-STAGE-2 -o ${bridgeName} -j DROP
+// iptables -A CNI-ISOLATION-STAGE-2 -j RETURN
+// ```
+func setupIsolationChains(ipt *iptables.IPTables, bridgeName string) error {
+	const (
+		// Future version may support custom chain names
+		stage1Chain = "CNI-ISOLATION-STAGE-1"
+		stage2Chain = "CNI-ISOLATION-STAGE-2"
+	)
+	// Commands:
+	// ```
+	// iptables -N CNI-ISOLATION-STAGE-1
+	// iptables -N CNI-ISOLATION-STAGE-2
+	// ```
+	for _, chain := range []string{stage1Chain, stage2Chain} {
+		if err := utils.EnsureChain(ipt, filterTableName, chain); err != nil {
+			return err
+		}
+	}
+
+	// Commands:
+	// ```
+	// iptables -I FORWARD -j CNI-ISOLATION-STAGE-1
+	// ```
+	jumpToStage1 := withDefaultComment([]string{"-j", stage1Chain})
+	//  NOTE: "-j CNI-ISOLATION-STAGE-1" needs to be before "CNI-FORWARD" created by CNI firewall plugin.
+	// So we specify prepend = true .
+	const jumpToStage1Prepend = true
+	if err := utils.InsertUnique(ipt, filterTableName, forwardChainName, jumpToStage1Prepend, jumpToStage1); err != nil {
+		return err
+	}
+
+	// Commands:
+	// ```
+	// iptables -A CNI-ISOLATION-STAGE-1 -i ${bridgeName} ! -o ${bridgeName} -j CNI-ISOLATION-STAGE-2
+	// iptables -A CNI-ISOLATION-STAGE-1 -j RETURN
+	// ```
+	stage1Bridge := withDefaultComment(isolationStage1BridgeRule(bridgeName, stage2Chain))
+	// prepend = true because this needs to be before "-j RETURN"
+	const stage1BridgePrepend = true
+	if err := utils.InsertUnique(ipt, filterTableName, stage1Chain, stage1BridgePrepend, stage1Bridge); err != nil {
+		return err
+	}
+	stage1Return := withDefaultComment([]string{"-j", "RETURN"})
+	if err := utils.InsertUnique(ipt, filterTableName, stage1Chain, false, stage1Return); err != nil {
+		return err
+	}
+
+	// Commands:
+	// ```
+	// iptables -A CNI-ISOLATION-STAGE-2 -o ${bridgeName} -j DROP
+	// iptables -A CNI-ISOLATION-STAGE-2 -j RETURN
+	// ```
+	stage2Bridge := withDefaultComment(isolationStage2BridgeRule(bridgeName))
+	// prepend = true because this needs to be before "-j RETURN"
+	const stage2BridgePrepend = true
+	if err := utils.InsertUnique(ipt, filterTableName, stage2Chain, stage2BridgePrepend, stage2Bridge); err != nil {
+		return err
+	}
+	stage2Return := withDefaultComment([]string{"-j", "RETURN"})
+	if err := utils.InsertUnique(ipt, filterTableName, stage2Chain, false, stage2Return); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func isolationStage1BridgeRule(bridgeName, stage2Chain string) []string {
+	return []string{"-i", bridgeName, "!", "-o", bridgeName, "-j", stage2Chain}
+}
+
+func isolationStage2BridgeRule(bridgeName string) []string {
+	return []string{"-o", bridgeName, "-j", "DROP"}
+}
+
+func withDefaultComment(rule []string) []string {
+	defaultComment := fmt.Sprintf("CNI firewall plugin rules (ingressPolicy: same-bridge)")
+	return withComment(rule, defaultComment)
+}
+
+func withComment(rule []string, comment string) []string {
+	return append(rule, []string{"-m", "comment", "--comment", comment}...)
+}

plugins/meta/flannel/README.md

@@ -1,5 +0,0 @@
-
-This document has moved to the [containernetworking/cni.dev](https://github.com/containernetworking/cni.dev) repo.
-
-You can find it online here: https://cni.dev/plugins/current/meta/flannel/
-

plugins/meta/flannel/flannel.go

@@ -1,279 +0,0 @@
-// Copyright 2015 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This is a "meta-plugin". It reads in its own netconf, combines it with
-// the data from flannel generated subnet file and then invokes a plugin
-// like bridge or ipvlan to do the real work.
-
-package main
-
-import (
-	"bufio"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"net"
-	"os"
-	"path/filepath"
-	"strconv"
-	"strings"
-
-	"github.com/containernetworking/cni/pkg/invoke"
-	"github.com/containernetworking/cni/pkg/skel"
-	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/version"
-
-	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
-)
-
-const (
-	defaultSubnetFile = "/run/flannel/subnet.env"
-	defaultDataDir    = "/var/lib/cni/flannel"
-)
-
-type NetConf struct {
-	types.NetConf
-
-	// IPAM field "replaces" that of types.NetConf which is incomplete
-	IPAM          map[string]interface{} `json:"ipam,omitempty"`
-	SubnetFile    string                 `json:"subnetFile"`
-	DataDir       string                 `json:"dataDir"`
-	Delegate      map[string]interface{} `json:"delegate"`
-	RuntimeConfig map[string]interface{} `json:"runtimeConfig,omitempty"`
-}
-
-type subnetEnv struct {
-	nw     *net.IPNet
-	sn     *net.IPNet
-	ip6Nw  *net.IPNet
-	ip6Sn  *net.IPNet
-	mtu    *uint
-	ipmasq *bool
-}
-
-func (se *subnetEnv) missing() string {
-	m := []string{}
-
-	if se.nw == nil && se.ip6Nw == nil {
-		m = append(m, []string{"FLANNEL_NETWORK", "FLANNEL_IPV6_NETWORK"}...)
-	}
-	if se.sn == nil && se.ip6Sn == nil {
-		m = append(m, []string{"FLANNEL_SUBNET", "FLANNEL_IPV6_SUBNET"}...)
-	}
-	if se.mtu == nil {
-		m = append(m, "FLANNEL_MTU")
-	}
-	if se.ipmasq == nil {
-		m = append(m, "FLANNEL_IPMASQ")
-	}
-	return strings.Join(m, ", ")
-}
-
-func loadFlannelNetConf(bytes []byte) (*NetConf, error) {
-	n := &NetConf{
-		SubnetFile: defaultSubnetFile,
-		DataDir:    defaultDataDir,
-	}
-	if err := json.Unmarshal(bytes, n); err != nil {
-		return nil, fmt.Errorf("failed to load netconf: %v", err)
-	}
-
-	return n, nil
-}
-
-func getIPAMRoutes(n *NetConf) ([]types.Route, error) {
-	rtes := []types.Route{}
-
-	if n.IPAM != nil && hasKey(n.IPAM, "routes") {
-		buf, _ := json.Marshal(n.IPAM["routes"])
-		if err := json.Unmarshal(buf, &rtes); err != nil {
-			return rtes, fmt.Errorf("failed to parse ipam.routes: %w", err)
-		}
-	}
-	return rtes, nil
-}
-
-func loadFlannelSubnetEnv(fn string) (*subnetEnv, error) {
-	f, err := os.Open(fn)
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-
-	se := &subnetEnv{}
-
-	s := bufio.NewScanner(f)
-	for s.Scan() {
-		parts := strings.SplitN(s.Text(), "=", 2)
-		switch parts[0] {
-		case "FLANNEL_NETWORK":
-			_, se.nw, err = net.ParseCIDR(parts[1])
-			if err != nil {
-				return nil, err
-			}
-
-		case "FLANNEL_SUBNET":
-			_, se.sn, err = net.ParseCIDR(parts[1])
-			if err != nil {
-				return nil, err
-			}
-
-		case "FLANNEL_IPV6_NETWORK":
-			_, se.ip6Nw, err = net.ParseCIDR(parts[1])
-			if err != nil {
-				return nil, err
-			}
-
-		case "FLANNEL_IPV6_SUBNET":
-			_, se.ip6Sn, err = net.ParseCIDR(parts[1])
-			if err != nil {
-				return nil, err
-			}
-
-		case "FLANNEL_MTU":
-			mtu, err := strconv.ParseUint(parts[1], 10, 32)
-			if err != nil {
-				return nil, err
-			}
-			se.mtu = new(uint)
-			*se.mtu = uint(mtu)
-
-		case "FLANNEL_IPMASQ":
-			ipmasq := parts[1] == "true"
-			se.ipmasq = &ipmasq
-		}
-	}
-	if err := s.Err(); err != nil {
-		return nil, err
-	}
-
-	if m := se.missing(); m != "" {
-		return nil, fmt.Errorf("%v is missing %v", fn, m)
-	}
-
-	return se, nil
-}
-
-func saveScratchNetConf(containerID, dataDir string, netconf []byte) error {
-	if err := os.MkdirAll(dataDir, 0700); err != nil {
-		return err
-	}
-	path := filepath.Join(dataDir, containerID)
-	return ioutil.WriteFile(path, netconf, 0600)
-}
-
-func consumeScratchNetConf(containerID, dataDir string) (func(error), []byte, error) {
-	path := filepath.Join(dataDir, containerID)
-
-	// cleanup will do clean job when no error happens in consuming/using process
-	cleanup := func(err error) {
-		if err == nil {
-			// Ignore errors when removing - Per spec safe to continue during DEL
-			_ = os.Remove(path)
-		}
-	}
-	netConfBytes, err := ioutil.ReadFile(path)
-
-	return cleanup, netConfBytes, err
-}
-
-func delegateAdd(cid, dataDir, cniVersion string, netconf map[string]interface{}) error {
-	netconfBytes, err := json.Marshal(netconf)
-	if err != nil {
-		return fmt.Errorf("error serializing delegate netconf: %v", err)
-	}
-
-	// save the rendered netconf for cmdDel
-	if err = saveScratchNetConf(cid, dataDir, netconfBytes); err != nil {
-		return err
-	}
-
-	result, err := invoke.DelegateAdd(context.TODO(), netconf["type"].(string), netconfBytes, nil)
-	if err != nil {
-		return err
-	}
-
-	return types.PrintResult(result, cniVersion)
-}
-
-func hasKey(m map[string]interface{}, k string) bool {
-	_, ok := m[k]
-	return ok
-}
-
-func isString(i interface{}) bool {
-	_, ok := i.(string)
-	return ok
-}
-
-func cmdAdd(args *skel.CmdArgs) error {
-	n, err := loadFlannelNetConf(args.StdinData)
-	if err != nil {
-		return err
-	}
-
-	fenv, err := loadFlannelSubnetEnv(n.SubnetFile)
-	if err != nil {
-		return err
-	}
-
-	if n.Delegate == nil {
-		n.Delegate = make(map[string]interface{})
-	} else {
-		if hasKey(n.Delegate, "type") && !isString(n.Delegate["type"]) {
-			return fmt.Errorf("'delegate' dictionary, if present, must have (string) 'type' field")
-		}
-		if hasKey(n.Delegate, "name") {
-			return fmt.Errorf("'delegate' dictionary must not have 'name' field, it'll be set by flannel")
-		}
-		if hasKey(n.Delegate, "ipam") {
-			return fmt.Errorf("'delegate' dictionary must not have 'ipam' field, it'll be set by flannel")
-		}
-	}
-
-	if n.RuntimeConfig != nil {
-		n.Delegate["runtimeConfig"] = n.RuntimeConfig
-	}
-
-	// Delegate CNI config version must match flannel plugin config version
-	n.Delegate["cniVersion"] = n.CNIVersion
-
-	return doCmdAdd(args, n.CNIVersion, n, fenv)
-}
-
-func cmdDel(args *skel.CmdArgs) error {
-	nc, err := loadFlannelNetConf(args.StdinData)
-	if err != nil {
-		return err
-	}
-
-	if nc.RuntimeConfig != nil {
-		if nc.Delegate == nil {
-			nc.Delegate = make(map[string]interface{})
-		}
-		nc.Delegate["runtimeConfig"] = nc.RuntimeConfig
-	}
-
-	return doCmdDel(args, nc)
-}
-
-func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.All, bv.BuildString("flannel"))
-}
-
-func cmdCheck(args *skel.CmdArgs) error {
-	// TODO: implement
-	return nil
-}

plugins/meta/flannel/flannel_linux.go

@@ -1,132 +0,0 @@
-// Copyright 2018 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This is a "meta-plugin". It reads in its own netconf, combines it with
-// the data from flannel generated subnet file and then invokes a plugin
-// like bridge or ipvlan to do the real work.
-
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"os"
-
-	"github.com/containernetworking/cni/pkg/invoke"
-	"github.com/containernetworking/cni/pkg/skel"
-	"github.com/containernetworking/cni/pkg/types"
-)
-
-// Return IPAM section for Delegate using input IPAM if present and replacing
-// or complementing as needed.
-func getDelegateIPAM(n *NetConf, fenv *subnetEnv) (map[string]interface{}, error) {
-	ipam := n.IPAM
-	if ipam == nil {
-		ipam = map[string]interface{}{}
-	}
-
-	if !hasKey(ipam, "type") {
-		ipam["type"] = "host-local"
-	}
-
-	var rangesSlice [][]map[string]interface{}
-
-	if fenv.sn != nil && fenv.sn.String() != "" {
-		rangesSlice = append(rangesSlice, []map[string]interface{}{
-			{"subnet": fenv.sn.String()},
-		},
-		)
-	}
-	if fenv.ip6Sn != nil && fenv.ip6Sn.String() != "" {
-		rangesSlice = append(rangesSlice, []map[string]interface{}{
-			{"subnet": fenv.ip6Sn.String()},
-		},
-		)
-	}
-	ipam["ranges"] = rangesSlice
-
-	rtes, err := getIPAMRoutes(n)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read IPAM routes: %w", err)
-	}
-	if fenv.nw != nil {
-		rtes = append(rtes, types.Route{Dst: *fenv.nw})
-	}
-	if fenv.ip6Nw != nil {
-		rtes = append(rtes, types.Route{Dst: *fenv.ip6Nw})
-	}
-	ipam["routes"] = rtes
-
-	return ipam, nil
-}
-
-func doCmdAdd(args *skel.CmdArgs, cniVersion string, n *NetConf, fenv *subnetEnv) error {
-	n.Delegate["name"] = n.Name
-
-	if !hasKey(n.Delegate, "type") {
-		n.Delegate["type"] = "bridge"
-	}
-
-	if !hasKey(n.Delegate, "ipMasq") {
-		// if flannel is not doing ipmasq, we should
-		ipmasq := !*fenv.ipmasq
-		n.Delegate["ipMasq"] = ipmasq
-	}
-
-	if !hasKey(n.Delegate, "mtu") {
-		mtu := fenv.mtu
-		n.Delegate["mtu"] = mtu
-	}
-
-	if n.Delegate["type"].(string) == "bridge" {
-		if !hasKey(n.Delegate, "isGateway") {
-			n.Delegate["isGateway"] = true
-		}
-	}
-	if n.CNIVersion != "" {
-		n.Delegate["cniVersion"] = n.CNIVersion
-	}
-
-	ipam, err := getDelegateIPAM(n, fenv)
-	if err != nil {
-		return fmt.Errorf("failed to assemble Delegate IPAM: %w", err)
-	}
-	n.Delegate["ipam"] = ipam
-
-	return delegateAdd(args.ContainerID, n.DataDir, cniVersion, n.Delegate)
-}
-
-func doCmdDel(args *skel.CmdArgs, n *NetConf) (err error) {
-	cleanup, netConfBytes, err := consumeScratchNetConf(args.ContainerID, n.DataDir)
-	if err != nil {
-		if os.IsNotExist(err) {
-			// Per spec should ignore error if resources are missing / already removed
-			return nil
-		}
-		return err
-	}
-
-	// cleanup will work when no error happens
-	defer func() {
-		cleanup(err)
-	}()
-
-	nc := &types.NetConf{}
-	if err = json.Unmarshal(netConfBytes, nc); err != nil {
-		return fmt.Errorf("failed to parse netconf: %v", err)
-	}
-
-	return invoke.DelegateDel(context.TODO(), nc.Type, netConfBytes, nil)
-}

plugins/meta/flannel/flannel_linux_test.go

@@ -1,697 +0,0 @@
-// Copyright 2015 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"io/ioutil"
-	"os"
-
-	"github.com/containernetworking/cni/pkg/skel"
-	current "github.com/containernetworking/cni/pkg/types/100"
-	"github.com/containernetworking/plugins/pkg/ns"
-	"github.com/containernetworking/plugins/pkg/testutils"
-
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-)
-
-var _ = Describe("Flannel", func() {
-	var (
-		originalNS          ns.NetNS
-		targetNS            ns.NetNS
-		onlyIpv4Input       string
-		onlyIpv6Input       string
-		dualStackInput      string
-		onlyIpv4SubnetFile  string
-		onlyIpv6SubnetFile  string
-		dualStackSubnetFile string
-		dataDir             string
-	)
-
-	const inputTemplate = `{
-	"name": "cni-flannel",
-	"type": "flannel",
-	"cniVersion": "%s",
-	"subnetFile": "%s",
-	"dataDir": "%s"%s
-}`
-
-	const inputIPAMTemplate = `
-    "unknown-param": "unknown-value",
-    "routes": [%s]%s`
-
-	const inputIPAMType = "my-ipam"
-
-	const inputIPAMNoTypeTemplate = `
-{
-    "unknown-param": "unknown-value",
-    "routes": [%s]%s
-}`
-
-	const inputIPAMRoutes = `
-      { "dst": "10.96.0.0/12" },
-      { "dst": "192.168.244.0/24", "gw": "10.1.17.20" }`
-
-	const onlyIpv4FlannelSubnetEnv = `
-FLANNEL_NETWORK=10.1.0.0/16
-FLANNEL_SUBNET=10.1.17.1/24
-FLANNEL_MTU=1472
-FLANNEL_IPMASQ=true
-`
-	const onlyIpv6FlannelSubnetEnv = `
-FLANNEL_IPV6_NETWORK=fc00::/48
-FLANNEL_IPV6_SUBNET=fc00::1/64
-FLANNEL_MTU=1472
-FLANNEL_IPMASQ=true
-`
-	const dualStackFlannelSubnetEnv = `
-FLANNEL_NETWORK=10.1.0.0/16
-FLANNEL_SUBNET=10.1.17.1/24
-FLANNEL_IPV6_NETWORK=fc00::/48
-FLANNEL_IPV6_SUBNET=fc00::1/64
-FLANNEL_MTU=1472
-FLANNEL_IPMASQ=true
-`
-
-	const IFNAME = "eth0"
-
-	var writeSubnetEnv = func(contents string) string {
-		file, err := ioutil.TempFile("", "subnet.env")
-		Expect(err).NotTo(HaveOccurred())
-		_, err = file.WriteString(contents)
-		Expect(err).NotTo(HaveOccurred())
-		return file.Name()
-	}
-
-	var makeInputIPAM = func(ipamType, routes, extra string) string {
-		c := "{\n"
-		if len(ipamType) > 0 {
-			c += fmt.Sprintf("    \"type\": \"%s\",", ipamType)
-		}
-		c += fmt.Sprintf(inputIPAMTemplate, routes, extra)
-		c += "\n}"
-
-		return c
-	}
-
-	var makeInput = func(cniVersion, inputIPAM string, subnetFile string) string {
-		ipamPart := ""
-		if len(inputIPAM) > 0 {
-			ipamPart = ",\n  \"ipam\":\n" + inputIPAM
-		}
-
-		return fmt.Sprintf(inputTemplate, cniVersion, subnetFile, dataDir, ipamPart)
-	}
-
-	var makeHostLocalIPAM = func(dataDir string) string {
-		return fmt.Sprintf(`{
-			"type": "host-local",
-			"dataDir": "%s"
-		}`, dataDir)
-	}
-
-	BeforeEach(func() {
-		var err error
-		originalNS, err = testutils.NewNS()
-		Expect(err).NotTo(HaveOccurred())
-		targetNS, err = testutils.NewNS()
-		Expect(err).NotTo(HaveOccurred())
-
-		// flannel subnet.env
-		onlyIpv4SubnetFile = writeSubnetEnv(onlyIpv4FlannelSubnetEnv)
-		onlyIpv6SubnetFile = writeSubnetEnv(onlyIpv6FlannelSubnetEnv)
-		dualStackSubnetFile = writeSubnetEnv(dualStackFlannelSubnetEnv)
-
-		// flannel state dir
-		dataDir, err = ioutil.TempDir("", "dataDir")
-		Expect(err).NotTo(HaveOccurred())
-	})
-
-	AfterEach(func() {
-		Expect(targetNS.Close()).To(Succeed())
-		Expect(testutils.UnmountNS(targetNS)).To(Succeed())
-		Expect(originalNS.Close()).To(Succeed())
-		Expect(testutils.UnmountNS(originalNS)).To(Succeed())
-
-		os.Remove(onlyIpv4SubnetFile)
-		os.Remove(onlyIpv6SubnetFile)
-		os.Remove(dualStackSubnetFile)
-		Expect(os.RemoveAll(dataDir)).To(Succeed())
-	})
-
-	Describe("CNI lifecycle", func() {
-		for _, ver := range testutils.AllSpecVersions {
-			// Redefine ver inside for scope so real value is picked up by each dynamically defined It()
-			// See Gingkgo's "Patterns for dynamically generating tests" documentation.
-			ver := ver
-
-			Context("when using only ipv4 stack", func() {
-				It(fmt.Sprintf("[%s] uses dataDir for storing network configuration with ipv4 stack", ver), func() {
-					inputIPAM := makeHostLocalIPAM(dataDir)
-					args := &skel.CmdArgs{
-						ContainerID: "some-container-id-ipv4",
-						Netns:       targetNS.Path(),
-						IfName:      IFNAME,
-						StdinData:   []byte(makeInput(ver, inputIPAM, onlyIpv4SubnetFile)),
-					}
-
-					err := originalNS.Do(func(ns.NetNS) error {
-						defer GinkgoRecover()
-
-						By("calling ADD with ipv4 stack")
-						GinkgoT().Logf("dataDir is %s", dataDir)
-						GinkgoT().Logf("conf is %s", args.StdinData)
-						resI, _, err := testutils.CmdAddWithArgs(args, func() error {
-							return cmdAdd(args)
-						})
-						Expect(err).NotTo(HaveOccurred())
-
-						By("check that plugin writes the net config to dataDir with ipv4 stack")
-						path := fmt.Sprintf("%s/%s", dataDir, "some-container-id-ipv4")
-						Expect(path).Should(BeAnExistingFile())
-
-						netConfBytes, err := ioutil.ReadFile(path)
-						Expect(err).NotTo(HaveOccurred())
-						expected := fmt.Sprintf(`{
-						    "cniVersion": "%s",
-						    "ipMasq": false,
-						    "ipam": {
-							"routes": [
-							    {
-								"dst": "10.1.0.0/16"
-							    }
-							],
-							"ranges": [
-							    [{
-								"subnet": "10.1.17.0/24"
-							    }]
-							],
-							"type": "host-local",
-							"dataDir": "%s"
-						    },
-						    "isGateway": true,
-						    "mtu": 1472,
-						    "name": "cni-flannel",
-						    "type": "bridge"
-						}`, ver, dataDir)
-						Expect(netConfBytes).Should(MatchJSON(expected))
-
-						result, err := current.NewResultFromResult(resI)
-						Expect(err).NotTo(HaveOccurred())
-						Expect(result.IPs).To(HaveLen(1))
-
-						By("calling DEL with ipv4 stack")
-						err = testutils.CmdDelWithArgs(args, func() error {
-							return cmdDel(args)
-						})
-						Expect(err).NotTo(HaveOccurred())
-
-						By("check that plugin removes net config from state dir with ipv4 stack")
-						Expect(path).ShouldNot(BeAnExistingFile())
-
-						By("calling DEL again with ipv4 stack")
-						err = testutils.CmdDelWithArgs(args, func() error {
-							return cmdDel(args)
-						})
-						By("check that plugin does not fail due to missing net config with ipv4 stack")
-						Expect(err).NotTo(HaveOccurred())
-
-						return nil
-					})
-					Expect(err).NotTo(HaveOccurred())
-				})
-			})
-
-			Context("when using only ipv6 stack", func() {
-				It(fmt.Sprintf("[%s] uses dataDir for storing network configuration with ipv6 stack", ver), func() {
-					inputIPAM := makeHostLocalIPAM(dataDir)
-					args := &skel.CmdArgs{
-						ContainerID: "some-container-id-ipv6",
-						Netns:       targetNS.Path(),
-						IfName:      IFNAME,
-						StdinData:   []byte(makeInput(ver, inputIPAM, onlyIpv6SubnetFile)),
-					}
-
-					err := originalNS.Do(func(ns.NetNS) error {
-						defer GinkgoRecover()
-
-						By("calling ADD with ipv6 stack")
-						resI, _, err := testutils.CmdAddWithArgs(args, func() error {
-							return cmdAdd(args)
-						})
-						Expect(err).NotTo(HaveOccurred())
-
-						By("check that plugin writes the net config to dataDir with ipv6 stack")
-						path := fmt.Sprintf("%s/%s", dataDir, "some-container-id-ipv6")
-						Expect(path).Should(BeAnExistingFile())
-
-						netConfBytes, err := ioutil.ReadFile(path)
-						Expect(err).NotTo(HaveOccurred())
-						expected := fmt.Sprintf(`{
-						    "cniVersion": "%s",
-						    "ipMasq": false,
-						    "ipam": {
-							"routes": [
-							    {
-								"dst": "fc00::/48"
-							    }
-							],
-							"ranges": [
-							    [{
-								"subnet": "fc00::/64"
-							    }]
-							],
-							"type": "host-local",
-							"dataDir": "%s"
-						    },
-						    "isGateway": true,
-						    "mtu": 1472,
-						    "name": "cni-flannel",
-						    "type": "bridge"
-						}`, ver, dataDir)
-						Expect(netConfBytes).Should(MatchJSON(expected))
-
-						result, err := current.NewResultFromResult(resI)
-						Expect(err).NotTo(HaveOccurred())
-						Expect(result.IPs).To(HaveLen(1))
-
-						By("calling DEL with ipv6 stack")
-						err = testutils.CmdDelWithArgs(args, func() error {
-							return cmdDel(args)
-						})
-						Expect(err).NotTo(HaveOccurred())
-
-						By("check that plugin removes net config from state dir with ipv6 stack")
-						Expect(path).ShouldNot(BeAnExistingFile())
-
-						By("calling DEL again with ipv6 stack")
-						err = testutils.CmdDelWithArgs(args, func() error {
-							return cmdDel(args)
-						})
-						By("check that plugin does not fail due to missing net config with ipv6 stack")
-						Expect(err).NotTo(HaveOccurred())
-
-						return nil
-					})
-					Expect(err).NotTo(HaveOccurred())
-				})
-			})
-
-			Context("when using dual stack", func() {
-				It(fmt.Sprintf("[%s] uses dataDir for storing network configuration with dual stack", ver), func() {
-					inputIPAM := makeHostLocalIPAM(dataDir)
-					args := &skel.CmdArgs{
-						ContainerID: "some-container-id-dual-stack",
-						Netns:       targetNS.Path(),
-						IfName:      IFNAME,
-						StdinData:   []byte(makeInput(ver, inputIPAM, dualStackSubnetFile)),
-					}
-
-					err := originalNS.Do(func(ns.NetNS) error {
-						defer GinkgoRecover()
-
-						By("calling ADD with dual stack")
-						resI, _, err := testutils.CmdAddWithArgs(args, func() error {
-							return cmdAdd(args)
-						})
-						Expect(err).NotTo(HaveOccurred())
-
-						By("check that plugin writes the net config to dataDir with dual stack")
-						path := fmt.Sprintf("%s/%s", dataDir, "some-container-id-dual-stack")
-						Expect(path).Should(BeAnExistingFile())
-
-						netConfBytes, err := ioutil.ReadFile(path)
-						Expect(err).NotTo(HaveOccurred())
-						expected := fmt.Sprintf(`{
-						    "cniVersion": "%s",
-						    "ipMasq": false,
-						    "ipam": {
-							"routes": [
-							    {
-								"dst": "10.1.0.0/16"
-							    },
-							    {
-								"dst": "fc00::/48"
-							    }
-							],
-							"ranges": [
-							    [{
-								"subnet": "10.1.17.0/24"
-							    }],
-							    [{
-								"subnet": "fc00::/64"
-							    }]
-							],
-							"type": "host-local",
-							"dataDir": "%s"
-						    },
-						    "isGateway": true,
-						    "mtu": 1472,
-						    "name": "cni-flannel",
-						    "type": "bridge"
-						}`, ver, dataDir)
-						Expect(netConfBytes).Should(MatchJSON(expected))
-
-						result, err := current.NewResultFromResult(resI)
-						Expect(err).NotTo(HaveOccurred())
-						Expect(result.IPs).To(HaveLen(2))
-
-						By("calling DEL with dual stack")
-						err = testutils.CmdDelWithArgs(args, func() error {
-							return cmdDel(args)
-						})
-						Expect(err).NotTo(HaveOccurred())
-
-						By("check that plugin removes net config from state dir with dual stack")
-						Expect(path).ShouldNot(BeAnExistingFile())
-
-						By("calling DEL again with dual stack")
-						err = testutils.CmdDelWithArgs(args, func() error {
-							return cmdDel(args)
-						})
-						By("check that plugin does not fail due to missing net config with dual stack")
-						Expect(err).NotTo(HaveOccurred())
-
-						return nil
-					})
-					Expect(err).NotTo(HaveOccurred())
-				})
-			})
-		}
-	})
-
-	Describe("loadFlannelNetConf", func() {
-		var (
-			onlyIpv4Input  string
-			onlyIpv6Input  string
-			dualStackInput string
-		)
-
-		BeforeEach(func() {
-			onlyIpv4Input = makeInput(current.ImplementedSpecVersion, "", onlyIpv4SubnetFile)
-			onlyIpv6Input = makeInput(current.ImplementedSpecVersion, "", onlyIpv6SubnetFile)
-			dualStackInput = makeInput(current.ImplementedSpecVersion, "", dualStackSubnetFile)
-		})
-
-		Context("when subnetFile and dataDir are specified with ipv4 stack", func() {
-			It("loads flannel network config with ipv4 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv4Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				Expect(conf.Name).To(Equal("cni-flannel"))
-				Expect(conf.Type).To(Equal("flannel"))
-				Expect(conf.SubnetFile).To(Equal(onlyIpv4SubnetFile))
-				Expect(conf.DataDir).To(Equal(dataDir))
-			})
-		})
-
-		Context("when subnetFile and dataDir are specified with ipv6 stack", func() {
-			It("loads flannel network config with ipv6 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv6Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				Expect(conf.Name).To(Equal("cni-flannel"))
-				Expect(conf.Type).To(Equal("flannel"))
-				Expect(conf.SubnetFile).To(Equal(onlyIpv6SubnetFile))
-				Expect(conf.DataDir).To(Equal(dataDir))
-			})
-		})
-
-		Context("when subnetFile and dataDir are specified with dual stack", func() {
-			It("loads flannel network config with dual stack", func() {
-				conf, err := loadFlannelNetConf([]byte(dualStackInput))
-				Expect(err).ShouldNot(HaveOccurred())
-				Expect(conf.Name).To(Equal("cni-flannel"))
-				Expect(conf.Type).To(Equal("flannel"))
-				Expect(conf.SubnetFile).To(Equal(dualStackSubnetFile))
-				Expect(conf.DataDir).To(Equal(dataDir))
-			})
-		})
-
-		Context("when defaulting subnetFile and dataDir with ipv4 stack", func() {
-			BeforeEach(func() {
-				onlyIpv4Input = `{
-"name": "cni-flannel",
-"type": "flannel"
-}`
-			})
-
-			It("loads flannel network config with defaults with ipv4 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv4Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				Expect(conf.Name).To(Equal("cni-flannel"))
-				Expect(conf.Type).To(Equal("flannel"))
-				Expect(conf.SubnetFile).To(Equal(defaultSubnetFile))
-				Expect(conf.DataDir).To(Equal(defaultDataDir))
-			})
-		})
-
-		Context("when defaulting subnetFile and dataDir with ipv6 stack", func() {
-			BeforeEach(func() {
-				onlyIpv6Input = `{
-"name": "cni-flannel",
-"type": "flannel"
-}`
-			})
-
-			It("loads flannel network config with defaults with ipv6 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv6Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				Expect(conf.Name).To(Equal("cni-flannel"))
-				Expect(conf.Type).To(Equal("flannel"))
-				Expect(conf.SubnetFile).To(Equal(defaultSubnetFile))
-				Expect(conf.DataDir).To(Equal(defaultDataDir))
-			})
-		})
-
-		Context("when defaulting subnetFile and dataDir with dual stack", func() {
-			BeforeEach(func() {
-				dualStackInput = `{
-"name": "cni-flannel",
-"type": "flannel"
-}`
-			})
-
-			It("loads flannel network config with defaults with dual stack", func() {
-				conf, err := loadFlannelNetConf([]byte(dualStackInput))
-				Expect(err).ShouldNot(HaveOccurred())
-				Expect(conf.Name).To(Equal("cni-flannel"))
-				Expect(conf.Type).To(Equal("flannel"))
-				Expect(conf.SubnetFile).To(Equal(defaultSubnetFile))
-				Expect(conf.DataDir).To(Equal(defaultDataDir))
-			})
-		})
-
-		Describe("loadFlannelSubnetEnv", func() {
-			Context("when flannel subnet env is valid with ipv4 stack", func() {
-				It("loads flannel subnet config with ipv4 stack", func() {
-					conf, err := loadFlannelSubnetEnv(onlyIpv4SubnetFile)
-					Expect(err).ShouldNot(HaveOccurred())
-					Expect(conf.nw.String()).To(Equal("10.1.0.0/16"))
-					Expect(conf.sn.String()).To(Equal("10.1.17.0/24"))
-					var mtu uint = 1472
-					Expect(*conf.mtu).To(Equal(mtu))
-					Expect(*conf.ipmasq).To(BeTrue())
-				})
-			})
-
-			Context("when flannel subnet env is valid with ipv6 stack", func() {
-				It("loads flannel subnet config with ipv6 stack", func() {
-					conf, err := loadFlannelSubnetEnv(onlyIpv6SubnetFile)
-					Expect(err).ShouldNot(HaveOccurred())
-					Expect(conf.ip6Nw.String()).To(Equal("fc00::/48"))
-					Expect(conf.ip6Sn.String()).To(Equal("fc00::/64"))
-					var mtu uint = 1472
-					Expect(*conf.mtu).To(Equal(mtu))
-					Expect(*conf.ipmasq).To(BeTrue())
-				})
-			})
-
-			Context("when flannel subnet env is valid with dual stack", func() {
-				It("loads flannel subnet config with dual stack", func() {
-					conf, err := loadFlannelSubnetEnv(dualStackSubnetFile)
-					Expect(err).ShouldNot(HaveOccurred())
-					Expect(conf.nw.String()).To(Equal("10.1.0.0/16"))
-					Expect(conf.sn.String()).To(Equal("10.1.17.0/24"))
-					Expect(conf.ip6Nw.String()).To(Equal("fc00::/48"))
-					Expect(conf.ip6Sn.String()).To(Equal("fc00::/64"))
-					var mtu uint = 1472
-					Expect(*conf.mtu).To(Equal(mtu))
-					Expect(*conf.ipmasq).To(BeTrue())
-				})
-			})
-
-			Context("when flannel subnet env is invalid with ipv4 stack", func() {
-				BeforeEach(func() {
-					onlyIpv4SubnetFile = writeSubnetEnv("foo=bar")
-				})
-				It("returns an error", func() {
-					_, err := loadFlannelSubnetEnv(onlyIpv4SubnetFile)
-					Expect(err).To(MatchError(ContainSubstring("missing FLANNEL_NETWORK, FLANNEL_IPV6_NETWORK, FLANNEL_SUBNET, FLANNEL_IPV6_SUBNET, FLANNEL_MTU, FLANNEL_IPMASQ")))
-				})
-			})
-
-			Context("when flannel subnet env is invalid with ipv6 stack", func() {
-				BeforeEach(func() {
-					onlyIpv6SubnetFile = writeSubnetEnv("foo=bar")
-				})
-				It("returns an error", func() {
-					_, err := loadFlannelSubnetEnv(onlyIpv6SubnetFile)
-					Expect(err).To(MatchError(ContainSubstring("missing FLANNEL_NETWORK, FLANNEL_IPV6_NETWORK, FLANNEL_SUBNET, FLANNEL_IPV6_SUBNET, FLANNEL_MTU, FLANNEL_IPMASQ")))
-				})
-			})
-
-			Context("when flannel subnet env is invalid with dual stack", func() {
-				BeforeEach(func() {
-					dualStackSubnetFile = writeSubnetEnv("foo=bar")
-				})
-				It("returns an error", func() {
-					_, err := loadFlannelSubnetEnv(dualStackSubnetFile)
-					Expect(err).To(MatchError(ContainSubstring("missing FLANNEL_NETWORK, FLANNEL_IPV6_NETWORK, FLANNEL_SUBNET, FLANNEL_IPV6_SUBNET, FLANNEL_MTU, FLANNEL_IPMASQ")))
-				})
-			})
-		})
-	})
-
-	Describe("getDelegateIPAM", func() {
-		Context("when input IPAM is provided with ipv4 stack", func() {
-			BeforeEach(func() {
-				inputIPAM := makeInputIPAM(inputIPAMType, inputIPAMRoutes, "")
-				onlyIpv4Input = makeInput(current.ImplementedSpecVersion, inputIPAM, onlyIpv4SubnetFile)
-			})
-			It("configures Delegate IPAM accordingly with ipv4 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv4Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				fenv, err := loadFlannelSubnetEnv(onlyIpv4SubnetFile)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				ipam, err := getDelegateIPAM(conf, fenv)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				podsRoute := "{ \"dst\": \"10.1.0.0/16\" }\n"
-				subnet := "\"ranges\": [[{\"subnet\": \"10.1.17.0/24\"}]]"
-				expected := makeInputIPAM(inputIPAMType, inputIPAMRoutes+",\n"+podsRoute, ",\n"+subnet)
-				buf, _ := json.Marshal(ipam)
-				Expect(buf).Should(MatchJSON(expected))
-			})
-		})
-
-		Context("when input IPAM is provided with ipv6 stack", func() {
-			BeforeEach(func() {
-				inputIPAM := makeInputIPAM(inputIPAMType, inputIPAMRoutes, "")
-				onlyIpv6Input = makeInput(current.ImplementedSpecVersion, inputIPAM, onlyIpv6SubnetFile)
-			})
-			It("configures Delegate IPAM accordingly with ipv6 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv6Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				fenv, err := loadFlannelSubnetEnv(onlyIpv6SubnetFile)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				ipam, err := getDelegateIPAM(conf, fenv)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				podsRoute := "{ \"dst\": \"fc00::/48\" }\n"
-				subnet := "\"ranges\": [[{ \"subnet\": \"fc00::/64\" }]]"
-				expected := makeInputIPAM(inputIPAMType, inputIPAMRoutes+",\n"+podsRoute, ",\n"+subnet)
-				buf, _ := json.Marshal(ipam)
-				Expect(buf).Should(MatchJSON(expected))
-			})
-		})
-
-		Context("when input IPAM is provided with dual stack", func() {
-			BeforeEach(func() {
-				inputIPAM := makeInputIPAM(inputIPAMType, inputIPAMRoutes, "")
-				dualStackInput = makeInput(current.ImplementedSpecVersion, inputIPAM, dualStackSubnetFile)
-			})
-			It("configures Delegate IPAM accordingly with dual stack", func() {
-				conf, err := loadFlannelNetConf([]byte(dualStackInput))
-				Expect(err).ShouldNot(HaveOccurred())
-				fenv, err := loadFlannelSubnetEnv(dualStackSubnetFile)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				ipam, err := getDelegateIPAM(conf, fenv)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				podsRoute := "{ \"dst\": \"10.1.0.0/16\" }" + ",\n" + "{ \"dst\": \"fc00::/48\" }\n"
-				subnet := "\"ranges\": [[{ \"subnet\": \"10.1.17.0/24\" }],\n[{ \"subnet\": \"fc00::/64\" }]]"
-				expected := makeInputIPAM(inputIPAMType, inputIPAMRoutes+",\n"+podsRoute, ",\n"+subnet)
-				buf, _ := json.Marshal(ipam)
-				Expect(buf).Should(MatchJSON(expected))
-			})
-		})
-
-		Context("when input IPAM is provided without 'type' with ipv4 stack", func() {
-			BeforeEach(func() {
-				inputIPAM := makeInputIPAM("", inputIPAMRoutes, "")
-				onlyIpv4Input = makeInput(current.ImplementedSpecVersion, inputIPAM, onlyIpv4SubnetFile)
-			})
-			It("configures Delegate IPAM with 'host-local' ipam with ipv4 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv4Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				fenv, err := loadFlannelSubnetEnv(onlyIpv4SubnetFile)
-				Expect(err).ShouldNot(HaveOccurred())
-				ipam, err := getDelegateIPAM(conf, fenv)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				podsRoute := "{ \"dst\": \"10.1.0.0/16\" }\n"
-				subnet := "\"ranges\": [[{\"subnet\": \"10.1.17.0/24\"}]]"
-				expected := makeInputIPAM("host-local", inputIPAMRoutes+",\n"+podsRoute, ",\n"+subnet)
-				buf, _ := json.Marshal(ipam)
-				Expect(buf).Should(MatchJSON(expected))
-			})
-		})
-
-		Context("when input IPAM is provided without 'type' with ipv6 stack", func() {
-			BeforeEach(func() {
-				inputIPAM := makeInputIPAM("", inputIPAMRoutes, "")
-				onlyIpv6Input = makeInput(current.ImplementedSpecVersion, inputIPAM, onlyIpv6SubnetFile)
-			})
-			It("configures Delegate IPAM with 'host-local' ipam with ipv6 stack", func() {
-				conf, err := loadFlannelNetConf([]byte(onlyIpv6Input))
-				Expect(err).ShouldNot(HaveOccurred())
-				fenv, err := loadFlannelSubnetEnv(onlyIpv6SubnetFile)
-				Expect(err).ShouldNot(HaveOccurred())
-				ipam, err := getDelegateIPAM(conf, fenv)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				podsRoute := "{ \"dst\": \"fc00::/48\" }\n"
-				subnet := "\"ranges\": [[{ \"subnet\": \"fc00::/64\" }]]"
-				expected := makeInputIPAM("host-local", inputIPAMRoutes+",\n"+podsRoute, ",\n"+subnet)
-				buf, _ := json.Marshal(ipam)
-				Expect(buf).Should(MatchJSON(expected))
-			})
-		})
-
-		Context("when input IPAM is provided without 'type' with dual stack", func() {
-			BeforeEach(func() {
-				inputIPAM := makeInputIPAM("", inputIPAMRoutes, "")
-				dualStackInput = makeInput(current.ImplementedSpecVersion, inputIPAM, dualStackSubnetFile)
-			})
-			It("configures Delegate IPAM with 'host-local' ipam with dual stack", func() {
-				conf, err := loadFlannelNetConf([]byte(dualStackInput))
-				Expect(err).ShouldNot(HaveOccurred())
-				fenv, err := loadFlannelSubnetEnv(dualStackSubnetFile)
-				Expect(err).ShouldNot(HaveOccurred())
-				ipam, err := getDelegateIPAM(conf, fenv)
-				Expect(err).ShouldNot(HaveOccurred())
-
-				podsRoute := "{ \"dst\": \"10.1.0.0/16\" }" + ",\n" + "{ \"dst\": \"fc00::/48\" }\n"
-				subnet := "\"ranges\": [[{ \"subnet\": \"10.1.17.0/24\" }],\n[{ \"subnet\": \"fc00::/64\" }]]"
-				expected := makeInputIPAM("host-local", inputIPAMRoutes+",\n"+podsRoute, ",\n"+subnet)
-				buf, _ := json.Marshal(ipam)
-				Expect(buf).Should(MatchJSON(expected))
-			})
-		})
-	})
-})

plugins/meta/flannel/flannel_windows.go

@@ -1,80 +0,0 @@
-// Copyright 2018 CNI authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// This is a "meta-plugin". It reads in its own netconf, combines it with
-// the data from flannel generated subnet file and then invokes a plugin
-// like bridge or ipvlan to do the real work.
-
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"github.com/containernetworking/cni/pkg/invoke"
-	"github.com/containernetworking/cni/pkg/skel"
-	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-	"github.com/containernetworking/plugins/pkg/hns"
-	"os"
-)
-
-func doCmdAdd(args *skel.CmdArgs, cniVersion string, n *NetConf, fenv *subnetEnv) error {
-	n.Delegate["name"] = n.Name
-
-	if !hasKey(n.Delegate, "type") {
-		n.Delegate["type"] = "win-bridge"
-	}
-
-	// if flannel needs ipmasq - get the plugin to configure it
-	// (this is the opposite of how linux works - on linux the flannel daemon configure ipmasq)
-	n.Delegate["ipMasq"] = *fenv.ipmasq
-	n.Delegate["ipMasqNetwork"] = fenv.nw.String()
-
-	n.Delegate["cniVersion"] = types020.ImplementedSpecVersion
-	if len(n.CNIVersion) != 0 {
-		n.Delegate["cniVersion"] = n.CNIVersion
-	}
-
-	n.Delegate["ipam"] = map[string]interface{}{
-		"type":   "host-local",
-		"subnet": fenv.sn.String(),
-	}
-
-	sandboxID := hns.GetSandboxContainerID(args.ContainerID, args.Netns)
-	return delegateAdd(sandboxID, n.DataDir, cniVersion, n.Delegate)
-}
-
-func doCmdDel(args *skel.CmdArgs, n *NetConf) (err error) {
-	cleanup, netConfBytes, err := consumeScratchNetConf(hns.GetSandboxContainerID(args.ContainerID, args.Netns), n.DataDir)
-	if err != nil {
-		if os.IsNotExist(err) {
-			// Per spec should ignore error if resources are missing / already removed
-			return nil
-		}
-		return err
-	}
-
-	// cleanup will work when no error happens
-	defer func() {
-		cleanup(err)
-	}()
-
-	nc := &types.NetConf{}
-	if err = json.Unmarshal(netConfBytes, nc); err != nil {
-		return fmt.Errorf("failed to parse netconf: %v", err)
-	}
-
-	return invoke.DelegateDel(context.TODO(), nc.Type, netConfBytes, nil)
-}

plugins/meta/portmap/chain.go

@@ -44,7 +44,7 @@ func (c *chain) setup(ipt *iptables.IPTables) error {
 
 	// Add the rules to the chain
 	for _, rule := range c.rules {
-		if err := insertUnique(ipt, c.table, c.name, false, rule); err != nil {
+		if err := utils.InsertUnique(ipt, c.table, c.name, false, rule); err != nil {
 			return err
 		}
 	}
@@ -55,7 +55,7 @@ func (c *chain) setup(ipt *iptables.IPTables) error {
 			r := []string{}
 			r = append(r, rule...)
 			r = append(r, "-j", c.name)
-			if err := insertUnique(ipt, c.table, entryChain, c.prependEntry, r); err != nil {
+			if err := utils.InsertUnique(ipt, c.table, entryChain, c.prependEntry, r); err != nil {
 				return err
 			}
 		}
@@ -101,24 +101,6 @@ func (c *chain) teardown(ipt *iptables.IPTables) error {
 	return utils.DeleteChain(ipt, c.table, c.name)
 }
 
-// insertUnique will add a rule to a chain if it does not already exist.
-// By default the rule is appended, unless prepend is true.
-func insertUnique(ipt *iptables.IPTables, table, chain string, prepend bool, rule []string) error {
-	exists, err := ipt.Exists(table, chain, rule...)
-	if err != nil {
-		return err
-	}
-	if exists {
-		return nil
-	}
-
-	if prepend {
-		return ipt.Insert(table, chain, 1, rule...)
-	} else {
-		return ipt.Append(table, chain, rule...)
-	}
-}
-
 // check the chain.
 func (c *chain) check(ipt *iptables.IPTables) error {
 

plugins/meta/portmap/portmap.go

@@ -127,26 +127,12 @@ func checkPorts(config *PortMapConf, containerNet net.IPNet) error {
 	}
 
 	if ip4t != nil {
-		exists, err := utils.ChainExists(ip4t, dnatChain.table, dnatChain.name)
-		if err != nil {
-			return err
-		}
-		if !exists {
-			return err
-		}
 		if err := dnatChain.check(ip4t); err != nil {
 			return fmt.Errorf("could not check ipv4 dnat: %v", err)
 		}
 	}
 
 	if ip6t != nil {
-		exists, err := utils.ChainExists(ip6t, dnatChain.table, dnatChain.name)
-		if err != nil {
-			return err
-		}
-		if !exists {
-			return err
-		}
 		if err := dnatChain.check(ip6t); err != nil {
 			return fmt.Errorf("could not check ipv6 dnat: %v", err)
 		}

plugins/meta/sbr/main.go

@@ -176,23 +176,9 @@ func cmdAdd(args *skel.CmdArgs) error {
 	return types.PrintResult(conf.PrevResult, conf.CNIVersion)
 }
 
-// doRoutes does all the work to set up routes and rules during an add.
+// getNextTableID picks the first free table id from a giveen candidate id
-func doRoutes(ipCfgs []*current.IPConfig, origRoutes []*types.Route, iface string) error {
+func getNextTableID(rules []netlink.Rule, routes []netlink.Route, candidateID int) int {
-	// Get a list of rules and routes ready.
+	table := candidateID
-	rules, err := netlink.RuleList(netlink.FAMILY_ALL)
-	if err != nil {
-		return fmt.Errorf("Failed to list all rules: %v", err)
-	}
-
-	routes, err := netlink.RouteList(nil, netlink.FAMILY_ALL)
-	if err != nil {
-		return fmt.Errorf("Failed to list all routes: %v", err)
-	}
-
-	// Pick a table ID to use. We pick the first table ID from firstTableID
-	// on that has no existing rules mapping to it and no existing routes in
-	// it.
-	table := firstTableID
 	for {
 		foundExisting := false
 		for _, rule := range rules {
@@ -215,7 +201,26 @@ func doRoutes(ipCfgs []*current.IPConfig, origRoutes []*types.Route, iface strin
 			break
 		}
 	}
+	return table
+}
 
+// doRoutes does all the work to set up routes and rules during an add.
+func doRoutes(ipCfgs []*current.IPConfig, origRoutes []*types.Route, iface string) error {
+	// Get a list of rules and routes ready.
+	rules, err := netlink.RuleList(netlink.FAMILY_ALL)
+	if err != nil {
+		return fmt.Errorf("Failed to list all rules: %v", err)
+	}
+
+	routes, err := netlink.RouteList(nil, netlink.FAMILY_ALL)
+	if err != nil {
+		return fmt.Errorf("Failed to list all routes: %v", err)
+	}
+
+	// Pick a table ID to use. We pick the first table ID from firstTableID
+	// on that has no existing rules mapping to it and no existing routes in
+	// it.
+	table := getNextTableID(rules, routes, firstTableID)
 	log.Printf("First unreferenced table: %d", table)
 
 	link, err := netlink.LinkByName(iface)
@@ -225,6 +230,12 @@ func doRoutes(ipCfgs []*current.IPConfig, origRoutes []*types.Route, iface strin
 
 	linkIndex := link.Attrs().Index
 
+	// Get all routes for the interface in the default routing table
+	routes, err = netlink.RouteList(link, netlink.FAMILY_ALL)
+	if err != nil {
+		return fmt.Errorf("Unable to list routes: %v", err)
+	}
+
 	// Loop through setting up source based rules and default routes.
 	for _, ipCfg := range ipCfgs {
 		log.Printf("Set rule for source %s", ipCfg.String())
@@ -274,39 +285,49 @@ func doRoutes(ipCfgs []*current.IPConfig, origRoutes []*types.Route, iface strin
 					err)
 			}
 		}
-	}
 
-	// Move all routes into the correct table. We are taking a shortcut; all
+		// Copy the previously added routes for the interface to the correct
-	// the routes have been added to the interface anyway but in the wrong
+		// table; all the routes have been added to the interface anyway but
-	// table, so instead of removing them we just move them to the table we
+		// in the wrong table, so instead of removing them we just move them
-	// want them in.
+		// to the table we want them in.
-	routes, err = netlink.RouteList(link, netlink.FAMILY_ALL)
+		for _, r := range routes {
-	if err != nil {
+			if ipCfg.Address.Contains(r.Src) || ipCfg.Address.Contains(r.Gw) ||
-		return fmt.Errorf("Unable to list routes: %v", err)
+				(r.Src == nil && r.Gw == nil) {
-	}
+				// (r.Src == nil && r.Gw == nil) is inferred as a generic route
+				log.Printf("Copying route %s from table %d to %d",
+					r.String(), r.Table, table)
 
-	for _, route := range routes {
+				r.Table = table
-		log.Printf("Moving route %s from table %d to %d",
-			route.String(), route.Table, table)
-
-		err := netlink.RouteDel(&route)
-		if err != nil {
-			return fmt.Errorf("Failed to delete route: %v", err)
-		}
-
-		route.Table = table
 
 				// Reset the route flags since if it is dynamically created,
 				// adding it to the new table will fail with "invalid argument"
-		route.Flags = 0
+				r.Flags = 0
 
 				// We use route replace in case the route already exists, which
 				// is possible for the default gateway we added above.
-		err = netlink.RouteReplace(&route)
+				err = netlink.RouteReplace(&r)
 				if err != nil {
 					return fmt.Errorf("Failed to readd route: %v", err)
 				}
 			}
+		}
+
+		// Use a different table for each ipCfg
+		table++
+		table = getNextTableID(rules, routes, table)
+	}
+
+	// Delete all the interface routes in the default routing table, which were
+	// copied to source based routing tables.
+	// Not deleting them while copying to accommodate for multiple ipCfgs from
+	// the same subnet. Else, (error for network is unreachable while adding gateway)
+	for _, route := range routes {
+		log.Printf("Deleting route %s from table %d", route.String(), route.Table)
+		err := netlink.RouteDel(&route)
+		if err != nil {
+			return fmt.Errorf("Failed to delete route: %v", err)
+		}
+	}
 
 	return nil
 }

plugins/meta/sbr/sbr_linux_test.go

@@ -401,6 +401,122 @@ var _ = Describe("sbr test", func() {
 		Expect(equalRoutes(expNet1.Routes, devNet1.Routes)).To(BeTrue())
 	})
 
+	It("Works with multiple IPs", func() {
+		ifname := "net1"
+		conf := `{
+	"cniVersion": "0.3.0",
+	"name": "cni-plugin-sbr-test",
+	"type": "sbr",
+	"prevResult": {
+		"cniVersion": "0.3.0",
+		"interfaces": [
+			{
+				"name": "%s",
+				"sandbox": "%s"
+			}
+		],
+		"ips": [
+			{
+				"version": "4",
+				"address": "192.168.1.209/24",
+				"gateway": "192.168.1.1",
+				"interface": 0
+			},
+			{
+				"version": "4",
+				"address": "192.168.101.209/24",
+				"gateway": "192.168.101.1",
+				"interface": 1
+			}
+		],
+		"routes": []
+	}
+}`
+		conf = fmt.Sprintf(conf, ifname, targetNs.Path())
+		args := &skel.CmdArgs{
+			ContainerID: "dummy",
+			Netns:       targetNs.Path(),
+			IfName:      ifname,
+			StdinData:   []byte(conf),
+		}
+
+		preStatus := createDefaultStatus()
+
+		// Add the second IP on net1 interface
+		preStatus.Devices[1].Addrs = append(preStatus.Devices[1].Addrs,
+			net.IPNet{
+				IP:   net.IPv4(192, 168, 101, 209),
+				Mask: net.IPv4Mask(255, 255, 255, 0),
+			})
+
+		err := setup(targetNs, preStatus)
+		Expect(err).NotTo(HaveOccurred())
+
+		oldStatus, err := readback(targetNs, []string{"net1", "eth0"})
+		Expect(err).NotTo(HaveOccurred())
+
+		_, _, err = testutils.CmdAddWithArgs(args, func() error { return cmdAdd(args) })
+		Expect(err).NotTo(HaveOccurred())
+
+		newStatus, err := readback(targetNs, []string{"net1", "eth0"})
+		Expect(err).NotTo(HaveOccurred())
+
+		// Check results. We expect all the routes on net1 to have moved to
+		// table 100 except for local routes (table 255); a new default gateway
+		// route to have been created; and 2 rules to exist.
+		expNet1 := oldStatus.Devices[0]
+		expEth0 := oldStatus.Devices[1]
+
+		for i := range expNet1.Routes {
+			if expNet1.Routes[i].Table != 255 {
+				if expNet1.Routes[i].Src.String() == "192.168.101.209" {
+					// All 192.168.101.x routes expected in table 101
+					expNet1.Routes[i].Table = 101
+				} else if expNet1.Routes[i].Src == nil && expNet1.Routes[i].Gw == nil {
+					// Generic Link Local Addresses assigned. They should exist in all
+					// route tables
+					expNet1.Routes[i].Table = 100
+					expNet1.Routes = append(expNet1.Routes,
+						netlink.Route{
+							Dst:       expNet1.Routes[i].Dst,
+							Table:     101,
+							LinkIndex: expNet1.Routes[i].LinkIndex})
+				} else {
+					// All 192.168.1.x routes expected in table 100
+					expNet1.Routes[i].Table = 100
+				}
+			}
+		}
+		expNet1.Routes = append(expNet1.Routes,
+			netlink.Route{
+				Gw:        net.IPv4(192, 168, 1, 1),
+				Table:     100,
+				LinkIndex: expNet1.Routes[0].LinkIndex})
+
+		expNet1.Routes = append(expNet1.Routes,
+			netlink.Route{
+				Gw:        net.IPv4(192, 168, 101, 1),
+				Table:     101,
+				LinkIndex: expNet1.Routes[0].LinkIndex})
+
+		// 2 Rules will be created for each IP address. (100, 101)
+		Expect(len(newStatus.Rules)).To(Equal(2))
+
+		// First entry corresponds to last table
+		Expect(newStatus.Rules[0].Table).To(Equal(101))
+		Expect(newStatus.Rules[0].Src.String()).To(Equal("192.168.101.209/32"))
+
+		// Second entry corresponds to first table (100)
+		Expect(newStatus.Rules[1].Table).To(Equal(100))
+		Expect(newStatus.Rules[1].Src.String()).To(Equal("192.168.1.209/32"))
+
+		devNet1 := newStatus.Devices[0]
+		devEth0 := newStatus.Devices[1]
+		Expect(equalRoutes(expNet1.Routes, devNet1.Routes)).To(BeTrue())
+		Expect(equalRoutes(expEth0.Routes, devEth0.Routes)).To(BeTrue())
+
+	})
+
 	It("fails with CNI spec versions that don't support plugin chaining", func() {
 		conf := `{
 	"cniVersion": "0.2.0",

plugins/meta/tuning/tuning.go

@@ -27,7 +27,6 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/j-keck/arping"
 	"github.com/vishvananda/netlink"
 	"golang.org/x/sys/unix"
 
@@ -315,18 +314,17 @@ func cmdAdd(args *skel.CmdArgs) error {
 		return err
 	}
 
-	result, err := current.NewResultFromResult(tuningConf.PrevResult)
-	if err != nil {
-		return err
-	}
-
 	// The directory /proc/sys/net is per network namespace. Enter in the
 	// network namespace before writing on it.
 
 	err = ns.WithNetNSPath(args.Netns, func(_ ns.NetNS) error {
 		for key, value := range tuningConf.SysCtl {
+			// If the key contains `IFNAME` - substitute it with args.IfName
+			// to allow setting sysctls on a particular interface, on which
+			// other operations (like mac/mtu setting) are performed
+			key = strings.Replace(key, "IFNAME", args.IfName, 1)
+
 			fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
-			fileName = filepath.Clean(fileName)
 
 			// Refuse to modify sysctl parameters that don't belong
 			// to the network subsystem.
@@ -351,12 +349,6 @@ func cmdAdd(args *skel.CmdArgs) error {
 				return err
 			}
 
-			for _, ipc := range result.IPs {
-				if ipc.Address.IP.To4() != nil {
-					_ = arping.GratuitousArpOverIfaceByName(ipc.Address.IP, args.IfName)
-				}
-			}
-
 			updateResultsMacAddr(tuningConf, args.IfName, tuningConf.Mac)
 		}
 
@@ -428,7 +420,6 @@ func cmdCheck(args *skel.CmdArgs) error {
 		// Check each configured value vs what's currently in the container
 		for key, confValue := range tuningConf.SysCtl {
 			fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
-			fileName = filepath.Clean(fileName)
 
 			contents, err := ioutil.ReadFile(fileName)
 			if err != nil {

plugins/meta/vrf/main.go

@@ -40,7 +40,7 @@ type VRFNetConf struct {
 }
 
 func main() {
-	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.PluginSupports("0.3.1", "0.4.0"), bv.BuildString("vrf"))
+	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.VersionsStartingFrom("0.3.1"), bv.BuildString("vrf"))
 }
 
 func cmdAdd(args *skel.CmdArgs) error {
@@ -123,6 +123,17 @@ func cmdDel(args *skel.CmdArgs) error {
 		return nil
 	})
 
+	if err != nil {
+		//  if NetNs is passed down by the Cloud Orchestration Engine, or if it called multiple times
+		// so don't return an error if the device is already removed.
+		// https://github.com/kubernetes/kubernetes/issues/43014#issuecomment-287164444
+		_, ok := err.(ns.NSPathNotExistErr)
+		if ok {
+			return nil
+		}
+		return err
+	}
+
 	if err != nil {
 		return fmt.Errorf("cmdDel failed: %v", err)
 	}

plugins/windows_only.txt

@@ -1,4 +1,3 @@
 plugins/ipam/host-local
 plugins/main/windows/win-bridge
 plugins/main/windows/win-overlay
-plugins/meta/flannel

scripts/release.sh

@@ -16,7 +16,7 @@ rm -Rf ${SRC_DIR}/${RELEASE_DIR}
 mkdir -p ${SRC_DIR}/${RELEASE_DIR}
 mkdir -p ${OUTPUT_DIR}
 
-$DOCKER run -ti -v ${SRC_DIR}:/go/src/github.com/containernetworking/plugins --rm golang:1.15-alpine \
+$DOCKER run -ti -v ${SRC_DIR}:/go/src/github.com/containernetworking/plugins:z --rm golang:1.17-alpine \
 /bin/sh -xe -c "\
     apk --no-cache add bash tar;
     cd /go/src/github.com/containernetworking/plugins; umask 0022;

vendor/github.com/Microsoft/go-winio/go.mod

@@ -1,9 +0,0 @@
-module github.com/Microsoft/go-winio
-
-go 1.12
-
-require (
-	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.7.0
-	golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c
-)

vendor/github.com/Microsoft/go-winio/go.sum

@@ -1,14 +0,0 @@
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
-github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/sirupsen/logrus v1.7.0 h1:ShrD1U9pZB12TX0cVy0DtePoCH97K8EtX+mg7ZARUtM=
-github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
-golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c h1:VwygUrnw9jn88c4u8GD3rZQbqrP/tgas88tPUbBxQrk=
-golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/Microsoft/hcsshim/CODEOWNERS

@@ -1,3 +1 @@
 * @microsoft/containerplat
-
-/hcn/* @nagiesek

vendor/github.com/Microsoft/hcsshim/Protobuild.toml

@@ -25,6 +25,7 @@ plugins = ["grpc", "fieldpath"]
   "gogoproto/gogo.proto" = "github.com/gogo/protobuf/gogoproto"
   "google/protobuf/any.proto" = "github.com/gogo/protobuf/types"
   "google/protobuf/empty.proto" = "github.com/gogo/protobuf/types"
+  "google/protobuf/struct.proto" = "github.com/gogo/protobuf/types"
   "google/protobuf/descriptor.proto" = "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
   "google/protobuf/field_mask.proto" = "github.com/gogo/protobuf/types"
   "google/protobuf/timestamp.proto" = "github.com/gogo/protobuf/types"
@@ -42,3 +43,7 @@ plugins = ["ttrpc"]
 [[overrides]]
 prefixes = ["github.com/Microsoft/hcsshim/internal/ncproxyttrpc"]
 plugins = ["ttrpc"]
+
+[[overrides]]
+prefixes = ["github.com/Microsoft/hcsshim/internal/vmservice"]
+plugins = ["ttrpc"]

vendor/github.com/Microsoft/hcsshim/computestorage/setup.go

@@ -49,7 +49,7 @@ func SetupBaseOSLayer(ctx context.Context, layerPath string, vhdHandle windows.H
 //
 // `options` are the options applied while processing the layer.
 func SetupBaseOSVolume(ctx context.Context, layerPath, volumePath string, options OsLayerOptions) (err error) {
-	if osversion.Get().Build < 19645 {
+	if osversion.Build() < 19645 {
 		return errors.New("SetupBaseOSVolume is not present on builds older than 19645")
 	}
 	title := "hcsshim.SetupBaseOSVolume"

vendor/github.com/Microsoft/hcsshim/computestorage/storage.go

@@ -4,7 +4,7 @@
 package computestorage
 
 import (
-	hcsschema "github.com/Microsoft/hcsshim/internal/schema2"
+	hcsschema "github.com/Microsoft/hcsshim/internal/hcs/schema2"
 )
 
 //go:generate go run ../mksyscall_windows.go -output zsyscall_windows.go storage.go

vendor/github.com/Microsoft/hcsshim/container.go

@@ -8,8 +8,8 @@ import (
 	"time"
 
 	"github.com/Microsoft/hcsshim/internal/hcs"
+	"github.com/Microsoft/hcsshim/internal/hcs/schema1"
 	"github.com/Microsoft/hcsshim/internal/mergemaps"
-	"github.com/Microsoft/hcsshim/internal/schema1"
 )
 
 // ContainerProperties holds the properties for a container and the processes running in that container

vendor/github.com/Microsoft/hcsshim/errors.go

@@ -59,7 +59,7 @@ var (
 	// ErrVmcomputeOperationInvalidState is an error encountered when the compute system is not in a valid state for the requested operation
 	ErrVmcomputeOperationInvalidState = hcs.ErrVmcomputeOperationInvalidState
 
-	// ErrProcNotFound is an error encountered when the the process cannot be found
+	// ErrProcNotFound is an error encountered when a procedure look up fails.
 	ErrProcNotFound = hcs.ErrProcNotFound
 
 	// ErrVmcomputeOperationAccessIsDenied is an error which can be encountered when enumerating compute systems in RS1/RS2
@@ -159,7 +159,7 @@ func (e *ProcessError) Error() string {
 // IsNotExist checks if an error is caused by the Container or Process not existing.
 // Note: Currently, ErrElementNotFound can mean that a Process has either
 // already exited, or does not exist. Both IsAlreadyStopped and IsNotExist
-// will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
+// will currently return true when the error is ErrElementNotFound.
 func IsNotExist(err error) bool {
 	if _, ok := err.(EndpointNotFoundError); ok {
 		return true
@@ -192,7 +192,7 @@ func IsTimeout(err error) bool {
 // a Container or Process being already stopped.
 // Note: Currently, ErrElementNotFound can mean that a Process has either
 // already exited, or does not exist. Both IsAlreadyStopped and IsNotExist
-// will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
+// will currently return true when the error is ErrElementNotFound.
 func IsAlreadyStopped(err error) bool {
 	return hcs.IsAlreadyStopped(getInnerError(err))
 }

vendor/github.com/Microsoft/hcsshim/go.mod

@@ -1,22 +0,0 @@
-module github.com/Microsoft/hcsshim
-
-go 1.13
-
-require (
-	github.com/Microsoft/go-winio v0.4.17-0.20210211115548-6eac466e5fa3
-	github.com/containerd/cgroups v0.0.0-20210114181951-8a68de567b68
-	github.com/containerd/console v1.0.1
-	github.com/containerd/containerd v1.5.0-beta.4
-	github.com/containerd/go-runc v0.0.0-20201020171139-16b287bc67d0
-	github.com/containerd/ttrpc v1.0.2
-	github.com/containerd/typeurl v1.0.1
-	github.com/gogo/protobuf v1.3.2
-	github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d
-	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.7.0
-	github.com/urfave/cli v1.22.2
-	go.opencensus.io v0.22.3
-	golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
-	golang.org/x/sys v0.0.0-20210324051608-47abb6519492
-	google.golang.org/grpc v1.33.2
-)

vendor/github.com/Microsoft/hcsshim/go.sum

@@ -1,851 +0,0 @@
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-k8s.io/kubernetes v1.13.0/go.mod h1:ocZa8+6APFNC2tX1DZASIbocyYT5jHzqFVsY5aoB7Jk=
-k8s.io/utils v0.0.0-20201110183641-67b214c5f920/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
-sigs.k8s.io/apiserver-network-proxy/konnectivity-client v0.0.14/go.mod h1:LEScyzhFmoF5pso/YSeBstl57mOzx9xlU9n85RGrDQg=
-sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
-sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=

vendor/github.com/Microsoft/hcsshim/hcn/hcn.go

@@ -3,6 +3,7 @@
 package hcn
 
 import (
+	"encoding/json"
 	"fmt"
 	"syscall"
 
@@ -93,8 +94,8 @@ type HostComputeQuery struct {
 }
 
 type ExtraParams struct {
-	Resources        interface{} `json:",omitempty"`
+	Resources        json.RawMessage `json:",omitempty"`
-	SharedContainers interface{} `json:",omitempty"`
+	SharedContainers json.RawMessage `json:",omitempty"`
 	LayeredOn        string          `json:",omitempty"`
 	SwitchGuid       string          `json:",omitempty"`
 	UtilityVM        string          `json:",omitempty"`
@@ -239,6 +240,15 @@ func VxlanPortSupported() error {
 	return platformDoesNotSupportError("VXLAN port configuration")
 }
 
+// TierAclPolicySupported returns an error if the HCN version does not support configuring the TierAcl.
+func TierAclPolicySupported() error {
+	supported := GetSupportedFeatures()
+	if supported.TierAcl {
+		return nil
+	}
+	return platformDoesNotSupportError("TierAcl")
+}
+
 // RequestType are the different operations performed to settings.
 // Used to update the settings of Endpoint/Namespace objects.
 type RequestType string

vendor/github.com/Microsoft/hcsshim/hcn/hcnendpoint.go

@@ -37,6 +37,7 @@ type HostComputeEndpoint struct {
 	Routes               []Route          `json:",omitempty"`
 	MacAddress           string           `json:",omitempty"`
 	Flags                EndpointFlags    `json:",omitempty"`
+	Health               Health           `json:",omitempty"`
 	SchemaVersion        SchemaVersion    `json:",omitempty"`
 }
 
@@ -58,6 +59,13 @@ type ModifyEndpointSettingRequest struct {
 	Settings     json.RawMessage      `json:",omitempty"`
 }
 
+// VmEndpointRequest creates a switch port with identifier `PortId`.
+type VmEndpointRequest struct {
+	PortId           guid.GUID `json:",omitempty"`
+	VirtualNicName   string    `json:",omitempty"`
+	VirtualMachineId guid.GUID `json:",omitempty"`
+}
+
 type PolicyEndpointRequest struct {
 	Policies []EndpointPolicy `json:",omitempty"`
 }

vendor/github.com/Microsoft/hcsshim/hcn/hcnglobals.go

@@ -53,10 +53,9 @@ var (
 	}
 	// HNS 12.0 allows for session affinity for loadbalancing
 	SessionAffinityVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 12, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
-	// HNS 10.5 through 11 (not included) and 12.0+ supports Ipv6 dual stack.
+	// HNS 11.10+ supports Ipv6 dual stack.
 	IPv6DualStackVersion = VersionRanges{
-		VersionRange{MinVersion: Version{Major: 10, Minor: 5}, MaxVersion: Version{Major: 10, Minor: math.MaxInt32}},
+		VersionRange{MinVersion: Version{Major: 11, Minor: 10}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}},
-		VersionRange{MinVersion: Version{Major: 12, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}},
 	}
 	// HNS 13.0 allows for Set Policy support
 	SetPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 13, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
@@ -74,6 +73,9 @@ var (
 
 	//HNS 13.2 allows for L4WfpProxy Policy support
 	L4WfpProxyPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 13, Minor: 2}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
+
+	//HNS 14.0 allows for TierAcl Policy support
+	TierAclPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 14, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
 )
 
 // GetGlobals returns the global properties of the HCN Service.

vendor/github.com/Microsoft/hcsshim/hcn/hcnloadbalancer.go

@@ -36,6 +36,7 @@ var (
 	LoadBalancerFlagsNone LoadBalancerFlags = 0
 	// LoadBalancerFlagsDSR enables Direct Server Return (DSR)
 	LoadBalancerFlagsDSR LoadBalancerFlags = 1
+	LoadBalancerFlagsIPv6 LoadBalancerFlags = 2
 )
 
 // LoadBalancerPortMappingFlags are special settings on a loadbalancer.

vendor/github.com/Microsoft/hcsshim/hcn/hcnpolicy.go

@@ -23,6 +23,7 @@ const (
 	// Endpoint and Network have InterfaceConstraint and ProviderAddress
 	NetworkProviderAddress     EndpointPolicyType = "ProviderAddress"
 	NetworkInterfaceConstraint EndpointPolicyType = "InterfaceConstraint"
+	TierAcl       EndpointPolicyType = "TierAcl"	
 )
 
 // EndpointPolicy is a collection of Policy settings for an Endpoint.
@@ -75,6 +76,12 @@ type SubnetPolicy struct {
 // NatFlags are flags for portmappings.
 type NatFlags uint32
 
+const (
+	NatFlagsNone NatFlags = iota
+	NatFlagsLocalRoutedVip
+	NatFlagsIPv6
+)
+
 /// Endpoint Policy objects
 
 // PortMappingPolicySetting defines Port Mapping (NAT)
@@ -100,6 +107,8 @@ const (
 	ActionTypeAllow ActionType = "Allow"
 	// Block traffic
 	ActionTypeBlock ActionType = "Block"
+	// Pass traffic
+	ActionTypePass ActionType = "Pass"
 
 	// In is traffic coming to the Endpoint
 	DirectionTypeIn DirectionType = "In"
@@ -135,6 +144,7 @@ type OutboundNatPolicySetting struct {
 	VirtualIP    string   `json:",omitempty"`
 	Exceptions   []string `json:",omitempty"`
 	Destinations []string `json:",omitempty"`
+	Flags        NatFlags `json:",omitempty"`
 }
 
 // SDNRoutePolicySetting sets SDN Route on an Endpoint.
@@ -154,12 +164,20 @@ type FiveTuple struct {
 	Priority        uint16 `json:",omitempty"`
 }
 
+// ProxyExceptions exempts traffic to IpAddresses and Ports
+type ProxyExceptions struct {
+	IpAddressExceptions []string `json:",omitempty"`
+	PortExceptions      []string `json:",omitempty"`
+}
+
 // L4WfpProxyPolicySetting sets Layer-4 Proxy on an endpoint.
 type L4WfpProxyPolicySetting struct {
 	InboundProxyPort   string          `json:",omitempty"`
 	OutboundProxyPort  string          `json:",omitempty"`
 	FilterTuple        FiveTuple       `json:",omitempty"`
 	UserSID            string          `json:",omitempty"`
+	InboundExceptions  ProxyExceptions `json:",omitempty"`
+	OutboundExceptions ProxyExceptions `json:",omitempty"`
 }
 
 // PortnameEndpointPolicySetting sets the port name for an endpoint.
@@ -289,3 +307,23 @@ type L4ProxyPolicySetting struct {
 	Destination string
 	OutboundNAT bool `json:",omitempty"`
 }
+
+// TierAclRule represents an ACL within TierAclPolicySetting
+type TierAclRule struct {
+	Id                string        `json:",omitempty"`
+	Protocols         string        `json:",omitempty"`
+	TierAclRuleAction ActionType    `json:","`
+	LocalAddresses    string        `json:",omitempty"`
+	RemoteAddresses   string        `json:",omitempty"`
+	LocalPorts        string        `json:",omitempty"`
+	RemotePorts       string        `json:",omitempty"`
+	Priority          uint16        `json:",omitempty"`
+}
+
+// TierAclPolicySetting represents a Tier containing ACLs
+type TierAclPolicySetting struct {
+	Name            string         `json:","`
+	Direction       DirectionType  `json:","`
+	Order           uint16         `json:""`
+	TierAclRules    []TierAclRule  `json:",omitempty"`
+}

vendor/github.com/Microsoft/hcsshim/hcn/hcnsupport.go

@@ -19,6 +19,7 @@ type SupportedFeatures struct {
 	VxlanPort                bool        `json:"VxlanPort"`
 	L4Proxy                  bool        `json:"L4Proxy"`    // network policy that applies VFP rules to all endpoints on the network to redirect traffic
 	L4WfpProxy               bool        `json:"L4WfpProxy"` // endpoint policy that applies WFP filters to redirect traffic to/from that endpoint
+	TierAcl                  bool        `json:"TierAcl"`
 }
 
 // AclFeatures are the supported ACL possibilities.
@@ -69,6 +70,7 @@ func GetSupportedFeatures() SupportedFeatures {
 	features.VxlanPort = isFeatureSupported(globals.Version, VxlanPortVersion)
 	features.L4Proxy = isFeatureSupported(globals.Version, L4ProxyPolicyVersion)
 	features.L4WfpProxy = isFeatureSupported(globals.Version, L4WfpProxyPolicyVersion)
+	features.TierAcl = isFeatureSupported(globals.Version, TierAclPolicyVersion)
 
 	return features
 }

vendor/github.com/Microsoft/hcsshim/interface.go

@@ -4,7 +4,7 @@ import (
 	"io"
 	"time"
 
-	"github.com/Microsoft/hcsshim/internal/schema1"
+	"github.com/Microsoft/hcsshim/internal/hcs/schema1"
 )
 
 // ProcessConfig is used as both the input of Container.CreateProcess

vendor/github.com/Microsoft/hcsshim/internal/cow/cow.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"io"
 
-	"github.com/Microsoft/hcsshim/internal/schema1"
+	"github.com/Microsoft/hcsshim/internal/hcs/schema1"
-	hcsschema "github.com/Microsoft/hcsshim/internal/schema2"
+	hcsschema "github.com/Microsoft/hcsshim/internal/hcs/schema2"
 )
 
 // Process is the interface for an OS process running in a container or utility VM.
@@ -17,6 +17,12 @@ type Process interface {
 	// CloseStdin causes the process's stdin handle to receive EOF/EPIPE/whatever
 	// is appropriate to indicate that no more data is available.
 	CloseStdin(ctx context.Context) error
+	// CloseStdout closes the stdout connection to the process. It is used to indicate
+	// that we are done receiving output on the shim side.
+	CloseStdout(ctx context.Context) error
+	// CloseStderr closes the stderr connection to the process. It is used to indicate
+	// that we are done receiving output on the shim side.
+	CloseStderr(ctx context.Context) error
 	// Pid returns the process ID.
 	Pid() int
 	// Stdio returns the stdio streams for a process. These may be nil if a stream

vendor/github.com/Microsoft/hcsshim/internal/hcs/callback.go

@@ -13,7 +13,7 @@ import (
 
 var (
 	nextCallback    uintptr
-	callbackMap     = map[uintptr]*notifcationWatcherContext{}
+	callbackMap     = map[uintptr]*notificationWatcherContext{}
 	callbackMapLock = sync.RWMutex{}
 
 	notificationWatcherCallback = syscall.NewCallback(notificationWatcher)
@@ -87,7 +87,7 @@ func (hn hcsNotification) String() string {
 
 type notificationChannel chan error
 
-type notifcationWatcherContext struct {
+type notificationWatcherContext struct {
 	channels notificationChannels
 	handle   vmcompute.HcsCallback
 

vendor/github.com/Microsoft/hcsshim/internal/hcs/errors.go

@@ -60,7 +60,7 @@ var (
 	// ErrVmcomputeOperationInvalidState is an error encountered when the compute system is not in a valid state for the requested operation
 	ErrVmcomputeOperationInvalidState = syscall.Errno(0xc0370105)
 
-	// ErrProcNotFound is an error encountered when the the process cannot be found
+	// ErrProcNotFound is an error encountered when a procedure look up fails.
 	ErrProcNotFound = syscall.Errno(0x7f)
 
 	// ErrVmcomputeOperationAccessIsDenied is an error which can be encountered when enumerating compute systems in RS1/RS2
@@ -242,12 +242,11 @@ func makeProcessError(process *Process, op string, err error, events []ErrorEven
 // IsNotExist checks if an error is caused by the Container or Process not existing.
 // Note: Currently, ErrElementNotFound can mean that a Process has either
 // already exited, or does not exist. Both IsAlreadyStopped and IsNotExist
-// will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
+// will currently return true when the error is ErrElementNotFound.
 func IsNotExist(err error) bool {
 	err = getInnerError(err)
 	return err == ErrComputeSystemDoesNotExist ||
-		err == ErrElementNotFound ||
+		err == ErrElementNotFound
-		err == ErrProcNotFound
 }
 
 // IsAlreadyClosed checks if an error is caused by the Container or Process having been
@@ -278,12 +277,11 @@ func IsTimeout(err error) bool {
 // a Container or Process being already stopped.
 // Note: Currently, ErrElementNotFound can mean that a Process has either
 // already exited, or does not exist. Both IsAlreadyStopped and IsNotExist
-// will currently return true when the error is ErrElementNotFound or ErrProcNotFound.
+// will currently return true when the error is ErrElementNotFound.
 func IsAlreadyStopped(err error) bool {
 	err = getInnerError(err)
 	return err == ErrVmcomputeAlreadyStopped ||
-		err == ErrElementNotFound ||
+		err == ErrElementNotFound
-		err == ErrProcNotFound
 }
 
 // IsNotSupported returns a boolean indicating whether the error is caused by

vendor/github.com/Microsoft/hcsshim/internal/hcs/process.go

@@ -118,7 +118,7 @@ func (process *Process) Signal(ctx context.Context, options interface{}) (bool,
 	process.handleLock.RLock()
 	defer process.handleLock.RUnlock()
 
-	operation := "hcsshim::Process::Signal"
+	operation := "hcs::Process::Signal"
 
 	if process.handle == 0 {
 		return false, makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -143,7 +143,7 @@ func (process *Process) Kill(ctx context.Context) (bool, error) {
 	process.handleLock.RLock()
 	defer process.handleLock.RUnlock()
 
-	operation := "hcsshim::Process::Kill"
+	operation := "hcs::Process::Kill"
 
 	if process.handle == 0 {
 		return false, makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -164,7 +164,7 @@ func (process *Process) Kill(ctx context.Context) (bool, error) {
 // This MUST be called exactly once per `process.handle` but `Wait` is safe to
 // call multiple times.
 func (process *Process) waitBackground() {
-	operation := "hcsshim::Process::waitBackground"
+	operation := "hcs::Process::waitBackground"
 	ctx, span := trace.StartSpan(context.Background(), operation)
 	defer span.End()
 	span.AddAttributes(
@@ -229,7 +229,7 @@ func (process *Process) ResizeConsole(ctx context.Context, width, height uint16)
 	process.handleLock.RLock()
 	defer process.handleLock.RUnlock()
 
-	operation := "hcsshim::Process::ResizeConsole"
+	operation := "hcs::Process::ResizeConsole"
 
 	if process.handle == 0 {
 		return makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -267,7 +267,7 @@ func (process *Process) ExitCode() (int, error) {
 		}
 		return process.exitCode, nil
 	default:
-		return -1, makeProcessError(process, "hcsshim::Process::ExitCode", ErrInvalidProcessState, nil)
+		return -1, makeProcessError(process, "hcs::Process::ExitCode", ErrInvalidProcessState, nil)
 	}
 }
 
@@ -275,7 +275,7 @@ func (process *Process) ExitCode() (int, error) {
 // these pipes does not close the underlying pipes. Once returned, these pipes
 // are the responsibility of the caller to close.
 func (process *Process) StdioLegacy() (_ io.WriteCloser, _ io.ReadCloser, _ io.ReadCloser, err error) {
-	operation := "hcsshim::Process::StdioLegacy"
+	operation := "hcs::Process::StdioLegacy"
 	ctx, span := trace.StartSpan(context.Background(), operation)
 	defer span.End()
 	defer func() { oc.SetSpanStatus(span, err) }()
@@ -327,7 +327,7 @@ func (process *Process) CloseStdin(ctx context.Context) error {
 	process.handleLock.RLock()
 	defer process.handleLock.RUnlock()
 
-	operation := "hcsshim::Process::CloseStdin"
+	operation := "hcs::Process::CloseStdin"
 
 	if process.handle == 0 {
 		return makeProcessError(process, operation, ErrAlreadyClosed, nil)
@@ -361,10 +361,59 @@ func (process *Process) CloseStdin(ctx context.Context) error {
 	return nil
 }
 
+func (process *Process) CloseStdout(ctx context.Context) (err error) {
+	ctx, span := trace.StartSpan(ctx, "hcs::Process::CloseStdout") //nolint:ineffassign,staticcheck
+	defer span.End()
+	defer func() { oc.SetSpanStatus(span, err) }()
+	span.AddAttributes(
+		trace.StringAttribute("cid", process.SystemID()),
+		trace.Int64Attribute("pid", int64(process.processID)))
+
+	process.handleLock.Lock()
+	defer process.handleLock.Unlock()
+
+	if process.handle == 0 {
+		return nil
+	}
+
+	process.stdioLock.Lock()
+	defer process.stdioLock.Unlock()
+	if process.stdout != nil {
+		process.stdout.Close()
+		process.stdout = nil
+	}
+	return nil
+}
+
+func (process *Process) CloseStderr(ctx context.Context) (err error) {
+	ctx, span := trace.StartSpan(ctx, "hcs::Process::CloseStderr") //nolint:ineffassign,staticcheck
+	defer span.End()
+	defer func() { oc.SetSpanStatus(span, err) }()
+	span.AddAttributes(
+		trace.StringAttribute("cid", process.SystemID()),
+		trace.Int64Attribute("pid", int64(process.processID)))
+
+	process.handleLock.Lock()
+	defer process.handleLock.Unlock()
+
+	if process.handle == 0 {
+		return nil
+	}
+
+	process.stdioLock.Lock()
+	defer process.stdioLock.Unlock()
+	if process.stderr != nil {
+		process.stderr.Close()
+		process.stderr = nil
+
+	}
+	return nil
+}
+
 // Close cleans up any state associated with the process but does not kill
 // or wait on it.
 func (process *Process) Close() (err error) {
-	operation := "hcsshim::Process::Close"
+	operation := "hcs::Process::Close"
 	ctx, span := trace.StartSpan(context.Background(), operation)
 	defer span.End()
 	defer func() { oc.SetSpanStatus(span, err) }()
@@ -414,7 +463,7 @@ func (process *Process) Close() (err error) {
 }
 
 func (process *Process) registerCallback(ctx context.Context) error {
-	callbackContext := &notifcationWatcherContext{
+	callbackContext := &notificationWatcherContext{
 		channels:  newProcessChannels(),
 		systemID:  process.SystemID(),
 		processID: process.processID,

vendor/github.com/Microsoft/hcsshim/internal/hcs/schema1/schema1.go

@@ -5,7 +5,7 @@ import (
 	"time"
 
 	"github.com/Microsoft/go-winio/pkg/guid"
-	hcsschema "github.com/Microsoft/hcsshim/internal/schema2"
+	hcsschema "github.com/Microsoft/hcsshim/internal/hcs/schema2"
 )
 
 // ProcessConfig is used as both the input of Container.CreateProcess