Merge pull request #809 from squeed/bridge-refresh-mac

bridge: refresh host-veth mac after port add

.github/actions/retest-action/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.17
 
 RUN apk add --no-cache curl jq
 

.github/actions/retest-action/entrypoint.sh

@@ -27,10 +27,10 @@ curl --request GET \
     --header "authorization: Bearer ${GITHUB_TOKEN}" \
     --header "content-type: application/json" | jq '.workflow_runs | max_by(.run_number)' > run.json
 
-RERUN_URL=$(jq -r '.rerun_url' run.json)
+RUN_URL=$(jq -r '.rerun_url' run.json)
 
 curl --request POST \
-    --url "${RERUN_URL}" \
+    --url "${RUN_URL}/rerun-failed-jobs" \
     --header "authorization: Bearer ${GITHUB_TOKEN}" \
     --header "content-type: application/json"
 
@@ -42,4 +42,4 @@ curl --request POST \
     --header "authorization: Bearer ${GITHUB_TOKEN}" \
     --header "accept: application/vnd.github.squirrel-girl-preview+json" \
     --header "content-type: application/json" \
-    --data '{ "content" : "rocket" }'
+    --data '{ "content" : "rocket" }'

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "docker" # See documentation for possible values
+    directory: "/.github/actions/retest-action" # Location of package manifests
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "github-actions" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+  - package-ecosystem: "gomod" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"

.github/workflows/commands.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       - name: Re-Test Action
         uses: ./.github/actions/retest-action

.github/workflows/stale.yml

@@ -0,0 +1,13 @@
+name: 'Close stale issues and PRs'
+on:
+  schedule:
+    - cron: '30 1 * * *'
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v7
+        with:
+          stale-pr-message: 'This PR has been untouched for too long without an update. It will be closed in 7 days.'
+          exempt-issue-labels: 'keep'

.github/workflows/test.yaml

@@ -4,8 +4,8 @@ name: test
 on: ["push", "pull_request"]
 
 env:
-  GO_VERSION: "1.16"
-  LINUX_ARCHES: "amd64 386 arm arm64 s390x mips64le ppc64le"
+  GO_VERSION: "1.18"
+  LINUX_ARCHES: "amd64 386 arm arm64 s390x mips64le ppc64le riscv64"
 
 jobs:
   build:
@@ -13,10 +13,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: setup go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Build on all supported architectures
         run: |
@@ -35,15 +35,18 @@ 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
+        uses: actions/setup-go@v3
         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
+      - uses: actions/checkout@v3
 
       - name: Install test binaries
         env:
@@ -69,9 +72,9 @@ jobs:
     runs-on: windows-latest
     steps:
       - name: setup go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ env.GO_VERSION }}
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: test
         run: bash ./test_windows.sh

OWNERS.md

@@ -7,3 +7,4 @@ This is the official list of the CNI network plugins owners:
 - Matt Dupre <matt@tigera.io> (@matthewdupre)
 - Michael Cambria <mcambria@redhat.com> (@mccv1r0)
 - Piotr Skarmuk <piotr.skarmuk@gmail.com> (@jellonek)
+- Michael Zappa <michael.zappa@gmail.com> (@MikeZappa87)

README.md

@@ -14,13 +14,14 @@ 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.
+* `dummy`: Creates a new Dummy device in the container.
 #### 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
 * `dhcp`: Runs a daemon on the host to make DHCP requests on behalf of the container
 * `host-local`: Maintains a local database of allocated IPs
-* `static`:  Allocate a static IPv4/IPv6 addresses to container and it's useful in debugging purpose.
+* `static`:  Allocate a single static IPv4/IPv6 address to container. It's useful in debugging purpose.
 
 ### Meta: other plugins
 * `tuning`: Tweaks sysctl parameters of an existing interface

go.mod

@@ -1,25 +1,41 @@
 module github.com/containernetworking/plugins
 
-go 1.16
+go 1.17
 
 require (
-	github.com/Microsoft/hcsshim v0.8.20
-	github.com/alexflint/go-filemutex v1.1.0
+	github.com/Microsoft/hcsshim v0.9.6
+	github.com/alexflint/go-filemutex v1.2.0
 	github.com/buger/jsonparser v1.1.1
-	github.com/containernetworking/cni v1.0.0
+	github.com/containernetworking/cni v1.1.2
 	github.com/coreos/go-iptables v0.6.0
-	github.com/coreos/go-systemd/v22 v22.3.2
+	github.com/coreos/go-systemd/v22 v22.5.0
 	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 v5.0.4
-	github.com/j-keck/arping v1.0.2
+	github.com/godbus/dbus/v5 v5.1.0
 	github.com/mattn/go-shellwords v1.0.12
-	github.com/onsi/ginkgo v1.16.4
-	github.com/onsi/gomega v1.15.0
-	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
+	github.com/networkplumbing/go-nft v0.2.0
+	github.com/onsi/ginkgo v1.16.5
+	github.com/onsi/gomega v1.24.2
+	github.com/safchain/ethtool v0.2.0
+	github.com/vishvananda/netlink v1.2.1-beta.2
+	golang.org/x/sys v0.4.0
+)
+
+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/google/go-cmp v0.5.9 // 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 v0.4.0 // indirect
+	golang.org/x/text v0.5.0 // indirect
+	gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -10,6 +10,7 @@ cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6T
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
 cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
 cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
@@ -52,13 +53,16 @@ github.com/Microsoft/hcsshim v0.8.9/go.mod h1:5692vkUqntj1idxauYlpoINNKeqCiG6Sg3
 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/go.mod h1:o5/SZqmR7x9JNKsW3pu+nqHm0MF8vbA+VxGOoXdC600=
-github.com/Microsoft/hcsshim v0.8.20 h1:ZTwcx3NS8n07kPf/JZ1qwU6vnjhVPMUWlXBF8r9UxrE=
-github.com/Microsoft/hcsshim v0.8.20/go.mod h1:+w2gRZ5ReXQhFOrvSQeNfhrYB/dg3oDwTOcER2fw4I4=
+github.com/Microsoft/hcsshim v0.8.21/go.mod h1:+w2gRZ5ReXQhFOrvSQeNfhrYB/dg3oDwTOcER2fw4I4=
+github.com/Microsoft/hcsshim v0.9.6 h1:VwnDOgLeoi2du6dAznfmspNqTiwczvjv4K7NxuY9jsY=
+github.com/Microsoft/hcsshim v0.9.6/go.mod h1:7pLA8lDk46WKDWlVsENo92gC0XFa8rbKfyFRBqxEbCc=
 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 v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/purell v1.1.1/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
+github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 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=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -66,8 +70,9 @@ github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuy
 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 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/alexflint/go-filemutex v1.2.0 h1:1v0TJPDtlhgpW4nJ+GvxCLSlUDC3+gW0CQQvlmfDR/s=
+github.com/alexflint/go-filemutex v1.2.0/go.mod h1:mYyQSWvw9Tx2/H2n9qXPb52tTYfE0pZAWcBq5mK025c=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 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=
@@ -77,6 +82,7 @@ github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+Ce
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bitly/go-simplejson v0.5.0/go.mod h1:cXHtHw4XUPsvGaxgjIAn8PhEWG9NfngEKAMDJEczWVA=
+github.com/bits-and-blooms/bitset v1.2.0/go.mod h1:gIdJ4wp64HaoK2YrL1Q5/N7Y16edYb8uY+O0FJTyyDA=
 github.com/blang/semver v3.1.0+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869/go.mod h1:Ekp36dRnpXw/yCqJaO+ZrUyxD+3VXMFFr56k5XYrpB4=
@@ -87,10 +93,12 @@ github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx2
 github.com/bugsnag/bugsnag-go v0.0.0-20141110184014-b1d153021fcd/go.mod h1:2oa8nejYd4cQ/b0hMIopN0lCRxU0bueqREvZLWFrtK8=
 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/cenkalti/backoff/v4 v4.1.1/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 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/checkpoint-restore/go-criu/v5 v5.0.0/go.mod h1:cfwC0EG7HMUenopBsUf9d89JlCLQIfgVcNsNN0t6T2M=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
@@ -98,8 +106,11 @@ github.com/cilium/ebpf v0.0.0-20200110133405-4032b1d8aae3/go.mod h1:MA5e5Lr8slmE
 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/cilium/ebpf v0.6.2/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/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
 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=
 github.com/containerd/aufs v0.0.0-20201003224125-76a6863f2989/go.mod h1:AkGGQs9NM2vtYHaUen+NljV0/baGCAPELGm2q9ZXpWU=
@@ -134,6 +145,7 @@ github.com/containerd/containerd v1.5.0-beta.3/go.mod h1:/wr9AVtEM7x9c+n0+stptlo
 github.com/containerd/containerd v1.5.0-beta.4/go.mod h1:GmdgZd2zA2GYIBZ0w09ZvgqEq8EfBp/m3lcVZIvPHhI=
 github.com/containerd/containerd v1.5.0-rc.0/go.mod h1:V/IXoMqNGgBlabz3tHD2TWDoTJseu1FGOKuoA4nNb2s=
 github.com/containerd/containerd v1.5.1/go.mod h1:0DOxVqwDy2iZvrZp2JUx/E+hS0UNTVn7dJnIOwtYR4g=
+github.com/containerd/containerd v1.5.7/go.mod h1:gyvv6+ugqY25TiXxcZC3L5yOeYgEw0QMhscqVp1AR9c=
 github.com/containerd/continuity v0.0.0-20190426062206-aaeac12a7ffc/go.mod h1:GL3xCUCBDV3CZiTSEKksMWbLE66hEyuu9qyDOOqM47Y=
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@@ -161,11 +173,13 @@ github.com/containerd/imgcrypt v1.1.1/go.mod h1:xpLnwiQmEUJPvQoAapeb2SNCxz7Xr6PJ
 github.com/containerd/nri v0.0.0-20201007170849-eb1350a75164/go.mod h1:+2wGSDGFYfE5+So4M5syatU0N0f0LbWpuqyMi4/BE8c=
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+github.com/containerd/ttrpc v1.1.0/go.mod h1:XX4ZTnoOId4HklF4edwc4DcqskFZuvXB1Evzy5KFQpQ=
 github.com/containerd/typeurl v0.0.0-20180627222232-a93fcdb778cd/go.mod h1:Cm3kwCdlkCfMSHURc+r6fwoGH6/F1hH3S4sg0rLFWPc=
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@@ -178,8 +192,8 @@ github.com/containerd/zfs v1.0.0/go.mod h1:m+m51S1DvAP6r3FcmYCp54bQ34pyOwTieQDNR
 github.com/containernetworking/cni v0.7.1/go.mod h1:LGwApLUm2FpoOfxTDEeq8T9ipbpZ61X79hmU3w8FmsY=
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-github.com/containernetworking/cni v1.0.0 h1:9VJe1a5uKtdeJIHC/UvbTweracOh6GafT0nfbEGVcQ0=
-github.com/containernetworking/cni v1.0.0/go.mod h1:AKuhXbN5EzmD4yTNtfSsX3tPcmtrBI6QcRV0NiNt15Y=
+github.com/containernetworking/cni v1.1.2 h1:wtRGZVv7olUHMOqouPpn3cXJWpJgM6+EUl31EQbXALQ=
+github.com/containernetworking/cni v1.1.2/go.mod h1:sDpYKmGVENF3s6uvMvGgldDWeG8dMxakj/u+i9ht9vw=
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@@ -200,13 +214,15 @@ github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e h1:Wf6HqHfScWJN9
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
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 github.com/coreos/go-systemd/v22 v22.1.0/go.mod h1:xO0FLkIi5MaZafQlIrOotqXZ90ih+1atmu1JpKERPPk=
-github.com/coreos/go-systemd/v22 v22.3.2 h1:D9/bQk5vlXQFZ6Kwuu6zaiXJ9oTPe68++AzAJc1DzSI=
 github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
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 github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
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 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/cyphar/filepath-securejoin v0.2.2/go.mod h1:FpkQEhXnPnOthhzymB7CGsFk2G9VLXONKD9G7QGMM+4=
 github.com/d2g/dhcp4 v0.0.0-20170904100407-a1d1b6c41b1c h1:Xo2rK1pzOm0jO6abTPIQwbAmqBIOj132otexc1mmzFc=
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@@ -224,9 +240,13 @@ github.com/dgrijalva/jwt-go v0.0.0-20170104182250-a601269ab70c/go.mod h1:E3ru+11
 github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
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+github.com/docker/cli v0.0.0-20191017083524-a8ff7f821017/go.mod h1:JLrzqnKDaYBop7H2jaqPtU4hHvMKP+vjCwu2uszcLI8=
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 github.com/docker/distribution v2.7.1-0.20190205005809-0d3efadf0154+incompatible/go.mod h1:J2gT2udsDAN96Uj4KfcMRqY0/ypR+oyYUYmja8H+y+w=
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+github.com/docker/docker-credential-helpers v0.6.3/go.mod h1:WRaJzqw3CTB9bk10avuGsjVBZsD05qeibJ1/TYlvc0Y=
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 github.com/docker/go-events v0.0.0-20170721190031-9461782956ad/go.mod h1:Uw6UezgYA44ePAFQYUehOuCzmy5zmg/+nl2ZfMWGkpA=
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@@ -243,6 +263,8 @@ github.com/emicklei/go-restful v2.9.5+incompatible/go.mod h1:otzb+WCGbkyDHkqmQmT
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
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+github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
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@@ -265,11 +287,17 @@ github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
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+github.com/go-logr/logr v1.2.3/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
+github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0=
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@@ -279,8 +307,9 @@ github.com/godbus/dbus v0.0.0-20180201030542-885f9cc04c9c/go.mod h1:/YcGZj5zSblf
 github.com/godbus/dbus v0.0.0-20190422162347-ade71ed3457e h1:BWhy2j3IXJhjCbC68FptL43tDKIq8FladmaTs3Xs7Z8=
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-github.com/godbus/dbus/v5 v5.0.4 h1:9349emZab16e7zQvpmsbtjc18ykshndd8y2PG3sgJbA=
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+github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
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@@ -302,6 +331,8 @@ github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfb
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@@ -330,6 +361,11 @@ github.com/google/go-cmp v0.5.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -338,6 +374,8 @@ github.com/google/pprof v0.0.0-20190515194954-54271f7e092f/go.mod h1:zfwlbNMJ+OI
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@@ -349,6 +387,7 @@ github.com/googleapis/gnostic v0.4.1/go.mod h1:LRhVm6pbyptWbWbuZ38d1eyptfvIytN3i
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@@ -358,6 +397,7 @@ github.com/grpc-ecosystem/go-grpc-middleware v1.0.1-0.20190118093823-f849b5445de
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@@ -367,16 +407,17 @@ github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ
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@@ -397,13 +438,15 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxv
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@@ -412,10 +455,12 @@ github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaO
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@@ -430,12 +475,17 @@ github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJ
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@@ -471,14 +540,17 @@ github.com/opencontainers/runc v0.1.1/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59P
 github.com/opencontainers/runc v1.0.0-rc8.0.20190926000215-3e425f80a8c9/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runc v1.0.0-rc9/go.mod h1:qT5XzbpPznkRYVz/mWwUaVBUv2rmF59PVA73FjuZG0U=
 github.com/opencontainers/runc v1.0.0-rc93/go.mod h1:3NOsor4w32B2tC0Zbl8Knk4Wg84SM2ImC1fxBuqJ/H0=
+github.com/opencontainers/runc v1.0.2/go.mod h1:aTaHFFwQXuA71CiyxOdFFIorAoemI04suvGRQFzWTD0=
 github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-spec v1.0.1/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-spec v1.0.2-0.20190207185410-29686dbc5559/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-spec v1.0.2/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
 github.com/opencontainers/runtime-spec v1.0.3-0.20200929063507-e6143ca7d51d/go.mod h1:jwyrGlmzljRJv/Fgzds9SsS/C5hL+LL3ko9hs6T5lQ0=
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 github.com/opencontainers/runtime-tools v0.0.0-20181011054405-1d69bd0f9c39/go.mod h1:r3f7wjNzSs2extwzU3Y+6pKfobzPh+kKFJ3ofN+3nfs=
 github.com/opencontainers/selinux v1.6.0/go.mod h1:VVGKuOLlE7v4PJyT6h7mNWvq1rzqiriPsEqVhc+svHE=
 github.com/opencontainers/selinux v1.8.0/go.mod h1:RScLhm78qiWa2gbVCcGkC7tCGdgk3ogry1nUQF8Evvo=
+github.com/opencontainers/selinux v1.8.2/go.mod h1:MUIHuUEvKB1wtJjQdOyYRgOnLD2xAPP8dBsCoU0KuF8=
 github.com/pelletier/go-toml v1.2.0/go.mod h1:5z9KED0ma1S8pY6P1sdut58dfprrGBbd/94hg7ilaic=
 github.com/pelletier/go-toml v1.8.1/go.mod h1:T2/BmBdy8dvIRq1a/8aqjN41wvWlN4lrapLU/GW4pbc=
 github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=
@@ -520,13 +592,14 @@ github.com/prometheus/procfs v0.2.0/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4O
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
 github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40TwIPHuXU=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
+github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/safchain/ethtool v0.0.0-20190326074333-42ed695e3de8/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=
-github.com/safchain/ethtool v0.0.0-20210803160452-9aa261dae9b1 h1:ZFfeKAhIQiiOrQaI3/znw0gOmYpO28Tcu1YaqMa/jtQ=
-github.com/safchain/ethtool v0.0.0-20210803160452-9aa261dae9b1/go.mod h1:Z0q5wiBQGYcxhMZ6gUqHn6pYNLypFAvaL3UvgZLR0U4=
+github.com/safchain/ethtool v0.2.0 h1:dILxMBqDnQfX192cCAPjZr9v2IgVXeElHPy435Z/IdE=
+github.com/safchain/ethtool v0.2.0/go.mod h1:WkKB1DnNtvsMlDmQ50sgwowDJV/hGbJSOvJoEXs1AJQ=
 github.com/satori/go.uuid v1.2.0/go.mod h1:dA0hQrYB0VpLJoorglMZABFdXlWrHn1NEOzdhQKdks0=
-github.com/sclevine/agouti v3.0.0+incompatible/go.mod h1:b4WX9W9L1sfQKXeJf1mUTLZKJ48R1S7H23Ji7oFO5Bw=
+github.com/sclevine/spec v1.2.0/go.mod h1:W4J29eT/Kzv7/b9IWLB055Z+qvVC9vt0Arko24q7p+U=
 github.com/seccomp/libseccomp-golang v0.9.1/go.mod h1:GbW5+tmTXfcxTToHLXlScSlAvWlF4P2Ca7zGrPiEpWo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/sirupsen/logrus v1.0.4-0.20170822132746-89742aefa4b2/go.mod h1:pMByvHTf9Beacp5x1UXfOR9xyW/9antXMhjMPG0dEzc=
@@ -565,8 +638,9 @@ github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXf
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
-github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/syndtr/gocapability v0.0.0-20170704070218-db04d3cc01c8/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20180916011248-d98352740cb2/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
 github.com/syndtr/gocapability v0.0.0-20200815063812-42c35b437635/go.mod h1:hkRG7XYTFWNJGYcbNJQlaLq0fg1yr4J4t/NcTQtrfww=
@@ -581,8 +655,8 @@ github.com/urfave/cli v1.22.2/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtX
 github.com/vishvananda/netlink v0.0.0-20181108222139-023a6dafdcdf/go.mod h1:+SR5DhBJrl6ZM7CoCKvpw5BKroDKQ+PJqOg65H/2ktk=
 github.com/vishvananda/netlink v1.1.0/go.mod h1:cTgwzPIzzgDAYoQrMm0EdrjRUBkTqKYppBueQtXaqoE=
 github.com/vishvananda/netlink v1.1.1-0.20201029203352-d40f9887b852/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
-github.com/vishvananda/netlink v1.1.1-0.20210330154013-f5de75959ad5 h1:+UB2BJA852UkGH42H+Oee69djmxS3ANzl2b/JtT1YiA=
-github.com/vishvananda/netlink v1.1.1-0.20210330154013-f5de75959ad5/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
+github.com/vishvananda/netlink v1.2.1-beta.2 h1:Llsql0lnQEbHj0I1OuKyp8otXp0r3q0mPkuhwHfStVs=
+github.com/vishvananda/netlink v1.2.1-beta.2/go.mod h1:twkDnbuQxJYemMlGd4JFIcuhgX83tXhKS2B/PRMpOho=
 github.com/vishvananda/netns v0.0.0-20180720170159-13995c7128cc/go.mod h1:ZjcWmFBXmLKZu9Nxj3WKYEafiSqer2rnvPr0en9UNpI=
 github.com/vishvananda/netns v0.0.0-20191106174202-0a2b9b5464df/go.mod h1:JP3t17pCcGlemwknint6hfoeCVQrEMVwxRLRjXpq+BU=
 github.com/vishvananda/netns v0.0.0-20200728191858-db3c7e526aae/go.mod h1:DD4vA1DwXk04H54A1oHXtwZmA0grkVMdPxx/VGLCah0=
@@ -597,12 +671,16 @@ github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q
 github.com/xordataexchange/crypt v0.0.3-0.20170626215501-b2862e3d0a77/go.mod h1:aYKd//L2LvnjZzWKhF00oedf4jCCReLcmhLdhm1A27Q=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
+github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 github.com/yvasiyarov/go-metrics v0.0.0-20140926110328-57bccd1ccd43/go.mod h1:aX5oPXxHm3bOH+xeAttToC8pqch2ScQN/JoXYupl6xs=
 github.com/yvasiyarov/gorelic v0.0.0-20141212073537-a9bba5b9ab50/go.mod h1:NUSPSUX/bi6SeDMUh6brw0nXpxHnc96TguQh0+r/ssA=
 github.com/yvasiyarov/newrelic_platform_go v0.0.0-20140908184405-b21fdbd4370f/go.mod h1:GlGEuHIJweS1mbCqG+7vt2nvWLzLLnRHbXz5JKd/Qbg=
 go.etcd.io/bbolt v1.3.2/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.3/go.mod h1:IbVyRI1SCnLcuJnV2u8VeU0CEYM7e686BmAb1XKL+uU=
 go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
+go.etcd.io/bbolt v1.3.6/go.mod h1:qXsaaIqmgQH0T+OPdb99Bf+PKfBBQVAdyD6TY9G8XM4=
 go.etcd.io/etcd v0.5.0-alpha.5.0.20200910180754-dd1b699fc489/go.mod h1:yVHk9ub3CSBatqGNg7GRmsnfLWtoW60w4eDYfh7vHDg=
 go.mozilla.org/pkcs7 v0.0.0-20200128120323-432b2356ecb1/go.mod h1:SNgMg+EgDFwmvSmLRTNKC5fegJjB7v23qTQ0XLGUNHk=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
@@ -610,6 +688,7 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
 go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
@@ -627,6 +706,8 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
 golang.org/x/crypto v0.0.0-20200728195943-123391ffb6de/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201002170205-7f63de1d35b0/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.1.0/go.mod h1:RecgLatLF4+eUMCP1PoPZQb+cVrJcOPbHkTkbkB9sbw=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190306152737-a1d7652674e8/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
 golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxTJOJm9Kp84zZh5NQWvqDGG3Qr8=
@@ -657,6 +738,11 @@ golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzB
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
+golang.org/x/mod v0.6.0-dev.0.20220106191415-9b9b3d81d5e3/go.mod h1:3p9vT2HGsQu2K1YbXdKPJLVgG5VJdoTa1poYQBtP1AY=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.6.0/go.mod h1:4mET923SAdbXp2ki8ey+zGs1SLqsuM2Y0uvdZR/fUNI=
+golang.org/x/mod v0.7.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -674,6 +760,7 @@ golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR
 golang.org/x/net v0.0.0-20190613194153-d28f0bde5980/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190619014844-b5b0513f8c1b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190813141303-74dc4d7220e7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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@@ -685,15 +772,27 @@ golang.org/x/net v0.0.0-20200222125558-5a598a2470a0/go.mod h1:z5CRVTTTmAJ677TzLL
 golang.org/x/net v0.0.0-20200226121028-0de0cce0169b/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
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+golang.org/x/net v0.0.0-20200501053045-e0ff5e5a1de5/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
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+golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
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@@ -705,9 +804,13 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
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@@ -726,6 +829,7 @@ golang.org/x/sys v0.0.0-20190606165138-5da285871e9c/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -752,7 +856,7 @@ golang.org/x/sys v0.0.0-20200217220822-9197077df867/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -760,6 +864,7 @@ golang.org/x/sys v0.0.0-20200817155316-9781c653f443/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -769,25 +874,49 @@ golang.org/x/sys v0.0.0-20201202213521-69691e467435/go.mod h1:h1NjWce9XRLGQEsW7w
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@@ -803,6 +932,7 @@ golang.org/x/tools v0.0.0-20190614205625-5aca471b1d59/go.mod h1:/rFqwRUd4F7ZHNgw
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 golang.org/x/tools v0.0.0-20190911174233-4f2ddba30aff/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191012152004-8de300cfc20a/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
@@ -821,9 +951,19 @@ golang.org/x/tools v0.0.0-20200207183749-b753a1ba74fa/go.mod h1:TB2adYChydJhpapK
 golang.org/x/tools v0.0.0-20200212150539-ea181f53ac56/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 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=
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 golang.org/x/tools v0.0.0-20200619180055-7c47624df98f/go.mod h1:EkVYQZoAsY45+roYkvgYkIh4xh/qjgUK9TdY2XT94GE=
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 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 v0.1.1/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.4/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
+golang.org/x/tools v0.1.10/go.mod h1:Uh6Zz+xoGYZom868N8YTex3t7RhtHDBrE8Gzo9bV56E=
+golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
+golang.org/x/tools v0.2.0/go.mod h1:y4OqIKeOV/fWJetJ8bXPU1sEVniLMIyDAZWeHdV+NTA=
+golang.org/x/tools v0.4.0/go.mod h1:UE5sM2OK9E/d67R0ANs2xJizIymRP5gJU295PvKXxjQ=
 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=
@@ -839,11 +979,13 @@ google.golang.org/api v0.15.0/go.mod h1:iLdEw5Ide6rF15KTC1Kkl0iskquN2gFfn9o9XIsb
 google.golang.org/api v0.17.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.18.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/api v0.20.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
+google.golang.org/api v0.22.0/go.mod h1:BwFmGc8tA3vsd7r/7kR8DY7iEEGSU04BFxCo5jP/sfE=
 google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.5.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/appengine v1.6.1/go.mod h1:i06prIuMbXzDqacNJfV5OdTW448YApPu5ww/cMBSeb0=
 google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
+google.golang.org/appengine v1.6.6/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCIDZVag1xfc=
 google.golang.org/cloud v0.0.0-20151119220103-975617b05ea8/go.mod h1:0H1ncTHf11KCFhTc/+EFRbzSCOZx+VUbRMk55Yv5MYk=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190307195333-5fe7a883aa19/go.mod h1:VzzqZJRnGkLBvHegQrXjBqPurQTc5/KpmUdxsrq26oE=
@@ -865,7 +1007,10 @@ google.golang.org/genproto v0.0.0-20200204135345-fa8e72b47b90/go.mod h1:GmwEX6Z4
 google.golang.org/genproto v0.0.0-20200212174721-66ed5ce911ce/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200305110556-506484158171/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20200527145253-8367513e4ece/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
 google.golang.org/genproto v0.0.0-20201110150050-8816d57aaa9a/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/grpc v0.0.0-20160317175043-d3ddb4469d5a/go.mod h1:yo6s7OP7yaDglbqo1J04qKzAhqBH6lvTonzMVmEdcZw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
@@ -879,8 +1024,12 @@ google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQ
 google.golang.org/grpc v1.26.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
 google.golang.org/grpc v1.27.1/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
 google.golang.org/grpc v1.33.2/go.mod h1:JMHMWHQWaTccqQQlmk3MJZS+GWXOdAesneDmEnv2fbc=
+google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -892,15 +1041,18 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
 google.golang.org/protobuf v1.24.0/go.mod h1:r/3tXBNzIEhYS9I1OUVjXDlt8tc493IdKGjtUeSXeh4=
 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=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.28.0 h1:w43yiav+6bVFTBQFZX0r7ipe9JQ1QsbMgHwbBziscLw=
+google.golang.org/protobuf v1.28.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 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=
 gopkg.in/check.v1 v1.0.0-20141024133853-64131543e789/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
+gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
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 gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
@@ -916,14 +1068,15 @@ gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWD
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
 gotest.tools/v3 v3.0.3/go.mod h1:Z7Lb0S5l+klDB31fvDQX8ss/FlKDxtlFlw3Oa8Ymbl8=
@@ -945,6 +1098,7 @@ 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/code-generator v0.19.7/go.mod h1:lwEq3YnLYb/7uVXLorOJfxg+cUu2oihFhHZ0n9NIla0=
 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=
@@ -953,8 +1107,12 @@ 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/gengo v0.0.0-20200428234225-8167cfdcfc14/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
+k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
+k8s.io/kube-openapi v0.0.0-20200805222855-6aeccd4b50c6/go.mod h1:UuqjUnNftUyPE5H64/qeyjQoUZhGpeFDVdxjTeEVN2o=
 k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd/go.mod h1:WOJ3KddDSol4tAGcJo0Tvi+dK12EcqSLqcWsryKMpfM=
 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=
@@ -963,6 +1121,7 @@ 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 v4.0.1/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
 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=

pkg/hns/endpoint_windows.go

@@ -39,6 +39,7 @@ type EndpointInfo struct {
 	NetworkId    string
 	Gateway      net.IP
 	IpAddress    net.IP
+	MacAddress  string
 }
 
 // GetSandboxContainerID returns the sandbox ID of this pod.
@@ -248,6 +249,7 @@ func GenerateHcnEndpoint(epInfo *EndpointInfo, n *NetConf) (*hcn.HostComputeEndp
 			Minor: 0,
 		},
 		Name:               epInfo.EndpointName,
+		MacAddress: epInfo.MacAddress,
 		HostComputeNetwork: epInfo.NetworkId,
 		Dns: hcn.Dns{
 			Domain:     epInfo.DNS.Domain,
@@ -280,6 +282,16 @@ func RemoveHcnEndpoint(epName string) error {
 		}
 		return errors.Annotatef(err, "failed to find HostComputeEndpoint %s", epName)
 	}
+	epNamespace, err := hcn.GetNamespaceByID(hcnEndpoint.HostComputeNamespace)
+	if err != nil && !hcn.IsNotFoundError(err) {
+		return errors.Annotatef(err, "failed to get HostComputeNamespace %s", epName)
+	}
+	if epNamespace != nil {
+		err = hcn.RemoveNamespaceEndpoint(hcnEndpoint.HostComputeNamespace, hcnEndpoint.Id)
+		if err != nil && !hcn.IsNotFoundError(err) {
+			return errors.Annotatef(err,"error removing endpoint: %s from namespace", epName)
+		}
+	}
 
 	err = hcnEndpoint.Delete()
 	if err != nil {

pkg/ip/cidr.go

@@ -19,43 +19,87 @@ import (
 	"net"
 )
 
-// NextIP returns IP incremented by 1
+// NextIP returns IP incremented by 1, if IP is invalid, return nil
 func NextIP(ip net.IP) net.IP {
-	i := ipToInt(ip)
-	return intToIP(i.Add(i, big.NewInt(1)))
+	normalizedIP := normalizeIP(ip)
+	if normalizedIP == nil {
+		return nil
+	}
+
+	i := ipToInt(normalizedIP)
+	return intToIP(i.Add(i, big.NewInt(1)), len(normalizedIP) == net.IPv6len)
 }
 
-// PrevIP returns IP decremented by 1
+// PrevIP returns IP decremented by 1, if IP is invalid, return nil
 func PrevIP(ip net.IP) net.IP {
-	i := ipToInt(ip)
-	return intToIP(i.Sub(i, big.NewInt(1)))
+	normalizedIP := normalizeIP(ip)
+	if normalizedIP == nil {
+		return nil
+	}
+
+	i := ipToInt(normalizedIP)
+	return intToIP(i.Sub(i, big.NewInt(1)), len(normalizedIP) == net.IPv6len)
 }
 
 // Cmp compares two IPs, returning the usual ordering:
 // a < b : -1
 // a == b : 0
 // a > b : 1
+// incomparable : -2
 func Cmp(a, b net.IP) int {
-	aa := ipToInt(a)
-	bb := ipToInt(b)
-	return aa.Cmp(bb)
+	normalizedA := normalizeIP(a)
+	normalizedB := normalizeIP(b)
+
+	if len(normalizedA) == len(normalizedB) && len(normalizedA) != 0 {
+		return ipToInt(normalizedA).Cmp(ipToInt(normalizedB))
+	}
+
+	return -2
 }
 
 func ipToInt(ip net.IP) *big.Int {
-	if v := ip.To4(); v != nil {
-		return big.NewInt(0).SetBytes(v)
+	return big.NewInt(0).SetBytes(ip)
+}
+
+func intToIP(i *big.Int, isIPv6 bool) net.IP {
+	intBytes := i.Bytes()
+
+	if len(intBytes) == net.IPv4len || len(intBytes) == net.IPv6len {
+		return intBytes
 	}
-	return big.NewInt(0).SetBytes(ip.To16())
+
+	if isIPv6 {
+		return append(make([]byte, net.IPv6len-len(intBytes)), intBytes...)
+	}
+
+	return append(make([]byte, net.IPv4len-len(intBytes)), intBytes...)
 }
 
-func intToIP(i *big.Int) net.IP {
-	return net.IP(i.Bytes())
+// normalizeIP will normalize IP by family,
+// IPv4 : 4-byte form
+// IPv6 : 16-byte form
+// others : nil
+func normalizeIP(ip net.IP) net.IP {
+	if ipTo4 := ip.To4(); ipTo4 != nil {
+		return ipTo4
+	}
+	return ip.To16()
 }
 
-// Network masks off the host portion of the IP
+// Network masks off the host portion of the IP, if IPNet is invalid,
+// return nil
 func Network(ipn *net.IPNet) *net.IPNet {
+	if ipn == nil {
+		return nil
+	}
+
+	maskedIP := ipn.IP.Mask(ipn.Mask)
+	if maskedIP == nil {
+		return nil
+	}
+
 	return &net.IPNet{
-		IP:   ipn.IP.Mask(ipn.Mask),
+		IP:   maskedIP,
 		Mask: ipn.Mask,
 	}
 }

pkg/ip/cidr_test.go

@@ -0,0 +1,247 @@
+// 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 ip
+
+import (
+	"net"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("CIDR functions", func() {
+	It("NextIP", func() {
+		testCases := []struct {
+			ip     net.IP
+			nextIP net.IP
+		}{
+			{
+				[]byte{192, 0, 2},
+				nil,
+			},
+			{
+				net.ParseIP("192.168.0.1"),
+				net.IPv4(192, 168, 0, 2).To4(),
+			},
+			{
+				net.ParseIP("192.168.0.255"),
+				net.IPv4(192, 168, 1, 0).To4(),
+			},
+			{
+				net.ParseIP("0.1.0.5"),
+				net.IPv4(0, 1, 0, 6).To4(),
+			},
+			{
+				net.ParseIP("AB12::123"),
+				net.ParseIP("AB12::124"),
+			},
+			{
+				net.ParseIP("AB12::FFFF"),
+				net.ParseIP("AB12::1:0"),
+			},
+			{
+				net.ParseIP("0::123"),
+				net.ParseIP("0::124"),
+			},
+		}
+
+		for _, test := range testCases {
+			ip := NextIP(test.ip)
+
+			Expect(ip).To(Equal(test.nextIP))
+		}
+	})
+
+	It("PrevIP", func() {
+		testCases := []struct {
+			ip     net.IP
+			prevIP net.IP
+		}{
+			{
+				[]byte{192, 0, 2},
+				nil,
+			},
+			{
+				net.ParseIP("192.168.0.2"),
+				net.IPv4(192, 168, 0, 1).To4(),
+			},
+			{
+				net.ParseIP("192.168.1.0"),
+				net.IPv4(192, 168, 0, 255).To4(),
+			},
+			{
+				net.ParseIP("0.1.0.5"),
+				net.IPv4(0, 1, 0, 4).To4(),
+			},
+			{
+				net.ParseIP("AB12::123"),
+				net.ParseIP("AB12::122"),
+			},
+			{
+				net.ParseIP("AB12::1:0"),
+				net.ParseIP("AB12::FFFF"),
+			},
+			{
+				net.ParseIP("0::124"),
+				net.ParseIP("0::123"),
+			},
+		}
+
+		for _, test := range testCases {
+			ip := PrevIP(test.ip)
+
+			Expect(ip).To(Equal(test.prevIP))
+		}
+	})
+
+	It("Cmp", func() {
+		testCases := []struct {
+			a      net.IP
+			b      net.IP
+			result int
+		}{
+			{
+				net.ParseIP("192.168.0.2"),
+				nil,
+				-2,
+			},
+			{
+				net.ParseIP("192.168.0.2"),
+				[]byte{192, 168, 5},
+				-2,
+			},
+			{
+				net.ParseIP("192.168.0.2"),
+				net.ParseIP("AB12::123"),
+				-2,
+			},
+			{
+				net.ParseIP("192.168.0.2"),
+				net.ParseIP("192.168.0.5"),
+				-1,
+			},
+			{
+				net.ParseIP("192.168.0.2"),
+				net.ParseIP("192.168.0.5").To4(),
+				-1,
+			},
+			{
+				net.ParseIP("192.168.0.10"),
+				net.ParseIP("192.168.0.5"),
+				1,
+			},
+			{
+				net.ParseIP("192.168.0.10"),
+				net.ParseIP("192.168.0.10"),
+				0,
+			},
+			{
+				net.ParseIP("192.168.0.10"),
+				net.ParseIP("192.168.0.10").To4(),
+				0,
+			},
+			{
+				net.ParseIP("AB12::122"),
+				net.ParseIP("AB12::123"),
+				-1,
+			},
+			{
+				net.ParseIP("AB12::210"),
+				net.ParseIP("AB12::123"),
+				1,
+			},
+			{
+				net.ParseIP("AB12::210"),
+				net.ParseIP("AB12::210"),
+				0,
+			},
+		}
+
+		for _, test := range testCases {
+			result := Cmp(test.a, test.b)
+
+			Expect(result).To(Equal(test.result))
+		}
+	})
+
+	It("Network", func() {
+		testCases := []struct {
+			ipNet  *net.IPNet
+			result *net.IPNet
+		}{
+			{
+				nil,
+				nil,
+			},
+			{
+				&net.IPNet{
+					IP:   nil,
+					Mask: net.IPv4Mask(255, 255, 255, 0),
+				},
+				nil,
+			},
+			{
+				&net.IPNet{
+					IP:   net.IPv4(192, 168, 0, 1),
+					Mask: nil,
+				},
+				nil,
+			},
+			{
+				&net.IPNet{
+					IP:   net.ParseIP("AB12::123"),
+					Mask: net.IPv4Mask(255, 255, 255, 0),
+				},
+				nil,
+			},
+			{
+				&net.IPNet{
+					IP:   net.IPv4(192, 168, 0, 100).To4(),
+					Mask: net.CIDRMask(120, 128),
+				},
+				&net.IPNet{
+					IP:   net.IPv4(192, 168, 0, 0).To4(),
+					Mask: net.CIDRMask(120, 128),
+				},
+			},
+			{
+				&net.IPNet{
+					IP:   net.IPv4(192, 168, 0, 100),
+					Mask: net.CIDRMask(24, 32),
+				},
+				&net.IPNet{
+					IP:   net.IPv4(192, 168, 0, 0).To4(),
+					Mask: net.CIDRMask(24, 32),
+				},
+			},
+			{
+				&net.IPNet{
+					IP:   net.ParseIP("AB12::123"),
+					Mask: net.CIDRMask(120, 128),
+				},
+				&net.IPNet{
+					IP:   net.ParseIP("AB12::100"),
+					Mask: net.CIDRMask(120, 128),
+				},
+			},
+		}
+
+		for _, test := range testCases {
+			result := Network(test.ipNet)
+
+			Expect(result).To(Equal(test.result))
+		}
+	})
+})

pkg/ip/ipforward_linux.go

@@ -16,7 +16,7 @@ package ip
 
 import (
 	"bytes"
-	"io/ioutil"
+	"os"
 
 	current "github.com/containernetworking/cni/pkg/types/100"
 )
@@ -53,10 +53,10 @@ func EnableForward(ips []*current.IPConfig) error {
 }
 
 func echo1(f string) error {
-	if content, err := ioutil.ReadFile(f); err == nil {
+	if content, err := os.ReadFile(f); err == nil {
 		if bytes.Equal(bytes.TrimSpace(content), []byte("1")) {
 			return nil
 		}
 	}
-	return ioutil.WriteFile(f, []byte("1"), 0644)
+	return os.WriteFile(f, []byte("1"), 0644)
 }

pkg/ip/ipforward_linux_test.go

@@ -1,7 +1,6 @@
 package ip
 
 import (
-	"io/ioutil"
 	"os"
 	"time"
 
@@ -11,7 +10,7 @@ import (
 
 var _ = Describe("IpforwardLinux", func() {
 	It("echo1 must not write the file if content is 1", func() {
-		file, err := ioutil.TempFile(os.TempDir(), "containernetworking")
+		file, err := os.CreateTemp("", "containernetworking")
 		Expect(err).NotTo(HaveOccurred())
 		defer os.Remove(file.Name())
 		err = echo1(file.Name())

pkg/ip/link_linux.go

@@ -36,9 +36,8 @@ var (
 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,
+			Name: name,
+			MTU:  mtu,
 		},
 		PeerName:      peer,
 		PeerNamespace: netlink.NsFd(int(hostNS.Fd())),
@@ -107,7 +106,7 @@ func makeVeth(name, vethPeerName string, mtu int, mac string, hostNS ns.NetNS) (
 // 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)
 	}
@@ -146,10 +145,6 @@ func SetupVethWithName(contVethName, hostVethName string, mtu int, contVethMac s
 		return net.Interface{}, net.Interface{}, err
 	}
 
-	if err = netlink.LinkSetUp(contVeth); err != nil {
-		return net.Interface{}, net.Interface{}, fmt.Errorf("failed to set %q up: %v", contVethName, err)
-	}
-
 	var hostVeth netlink.Link
 	err = hostNS.Do(func(_ ns.NetNS) error {
 		hostVeth, err = netlink.LinkByName(hostVethName)

pkg/ip/route_linux.go

@@ -42,6 +42,11 @@ func AddHostRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error {
 
 // AddDefaultRoute sets the default route on the given gateway.
 func AddDefaultRoute(gw net.IP, dev netlink.Link) error {
-	_, defNet, _ := net.ParseCIDR("0.0.0.0/0")
+	var defNet *net.IPNet
+	if gw.To4() != nil {
+		_, defNet, _ = net.ParseCIDR("0.0.0.0/0")
+	} else {
+		_, defNet, _ = net.ParseCIDR("::/0")
+	}
 	return AddRoute(defNet, gw, dev)
 }

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

@@ -0,0 +1,27 @@
+// 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 (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestIp(t *testing.T) {
+	RegisterFailHandler(Fail)
+	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
-	PROCFS_MAGIC = 0x9fa0
+	NSFS_MAGIC   = unix.NSFS_MAGIC
+	PROCFS_MAGIC = unix.PROC_SUPER_MAGIC
 )
 
 type NSPathNotExistErr struct{ msg string }

pkg/ns/ns_linux_test.go

@@ -17,7 +17,6 @@ package ns_test
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sync"
@@ -208,7 +207,7 @@ var _ = Describe("Linux namespace operations", func() {
 			})
 
 			It("fails when the path is not a namespace", func() {
-				tempFile, err := ioutil.TempFile("", "nstest")
+				tempFile, err := os.CreateTemp("", "nstest")
 				Expect(err).NotTo(HaveOccurred())
 				defer tempFile.Close()
 
@@ -262,7 +261,7 @@ var _ = Describe("Linux namespace operations", func() {
 		})
 
 		It("should refuse other paths", func() {
-			tempFile, err := ioutil.TempFile("", "nstest")
+			tempFile, err := os.CreateTemp("", "nstest")
 			Expect(err).NotTo(HaveOccurred())
 			defer tempFile.Close()
 

pkg/testutils/cmd.go

@@ -15,7 +15,7 @@
 package testutils
 
 import (
-	"io/ioutil"
+	"io"
 	"os"
 
 	"github.com/containernetworking/cni/pkg/skel"
@@ -52,7 +52,7 @@ func CmdAdd(cniNetns, cniContainerID, cniIfname string, conf []byte, f func() er
 
 	var out []byte
 	if err == nil {
-		out, err = ioutil.ReadAll(r)
+		out, err = io.ReadAll(r)
 	}
 	os.Stdout = oldStdout
 

pkg/testutils/dns.go

@@ -16,7 +16,6 @@ package testutils
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -28,7 +27,7 @@ import (
 // an error if any occurs while creating/writing the file. It is the caller's
 // responsibility to remove the file.
 func TmpResolvConf(dnsConf types.DNS) (string, error) {
-	f, err := ioutil.TempFile("", "cni_test_resolv.conf")
+	f, err := os.CreateTemp("", "cni_test_resolv.conf")
 	if err != nil {
 		return "", fmt.Errorf("failed to get temp file for CNI test resolv.conf: %v", err)
 	}

pkg/testutils/echo/echo_test.go

@@ -2,7 +2,7 @@ package main_test
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"os/exec"
 	"strings"
@@ -74,7 +74,7 @@ var _ = Describe("Echosvr", func() {
 			defer conn.Close()
 
 			fmt.Fprintf(conn, "hello\n")
-			Expect(ioutil.ReadAll(conn)).To(Equal([]byte("hello")))
+			Expect(io.ReadAll(conn)).To(Equal([]byte("hello")))
 		})
 	})
 

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/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

@@ -16,7 +16,7 @@ package sysctl
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 	"path/filepath"
 	"strings"
 )
@@ -36,8 +36,7 @@ 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)
+	data, err := os.ReadFile(fullName)
 	if err != nil {
 		return "", err
 	}
@@ -47,8 +46,7 @@ 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 {
+	if err := os.WriteFile(fullName, []byte(value), 0644); err != nil {
 		return "", err
 	}
 

plugins/ipam/dhcp/daemon.go

@@ -15,27 +15,26 @@
 package main
 
 import (
+	"context"
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/rpc"
 	"os"
+	"os/signal"
 	"path/filepath"
 	"runtime"
 	"sync"
+	"syscall"
 	"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 {
@@ -55,25 +54,47 @@ 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)
 	}
 
-	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)
+	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)
+
+	// If we already have an active lease for this clientID, do not create
+	// another one
+	l := d.getLease(clientID)
+	if l != nil {
+		l.Check()
+	} else {
+		hostNetns := d.hostNetnsPrefix + args.Netns
+		l, err = AcquireLease(clientID, hostNetns, args.IfName,
+			optsRequesting, optsProviding,
+			d.clientTimeout, d.clientResendMax, d.broadcast)
+		if err != nil {
+			return err
+		}
+	}
+
 	ipn, err := l.IPNet()
 	if err != nil {
 		l.Stop()
@@ -94,7 +115,7 @@ 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)
 	}
@@ -128,7 +149,7 @@ func (d *DHCP) setLease(clientID string, l *DHCPLease) {
 	d.leases[clientID] = l
 }
 
-//func (d *DHCP) clearLease(contID, netName, ifName string) {
+// func (d *DHCP) clearLease(contID, netName, ifName string) {
 func (d *DHCP) clearLease(clientID string) {
 	d.mux.Lock()
 	defer d.mux.Unlock()
@@ -174,7 +195,7 @@ func runDaemon(
 		if !filepath.IsAbs(pidfilePath) {
 			return fmt.Errorf("Error writing pidfile %q: path not absolute", pidfilePath)
 		}
-		if err := ioutil.WriteFile(pidfilePath, []byte(fmt.Sprintf("%d", os.Getpid())), 0644); err != nil {
+		if err := os.WriteFile(pidfilePath, []byte(fmt.Sprintf("%d", os.Getpid())), 0644); err != nil {
 			return fmt.Errorf("Error writing pidfile %q: %v", pidfilePath, err)
 		}
 	}
@@ -184,11 +205,27 @@ func runDaemon(
 		return fmt.Errorf("Error getting listener: %v", err)
 	}
 
+	srv := http.Server{}
+	exit := make(chan os.Signal, 1)
+	done := make(chan bool, 1)
+	signal.Notify(exit, os.Interrupt, syscall.SIGTERM)
+
+	go func() {
+		<-exit
+		srv.Shutdown(context.TODO())
+		os.Remove(hostPrefix + socketPath)
+		os.Remove(pidfilePath)
+
+		done <- true
+	}()
+
 	dhcp := newDHCP(dhcpClientTimeout, resendMax)
 	dhcp.hostNetnsPrefix = hostPrefix
 	dhcp.broadcast = broadcast
 	rpc.Register(dhcp)
 	rpc.HandleHTTP()
-	http.Serve(l, nil)
+	srv.Serve(l)
+
+	<-done
 	return nil
 }

plugins/ipam/dhcp/dhcp_test.go

@@ -18,7 +18,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"os"
 	"os/exec"
@@ -27,7 +26,7 @@ import (
 	"time"
 
 	"github.com/containernetworking/cni/pkg/skel"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
@@ -43,7 +42,7 @@ import (
 )
 
 func getTmpDir() (string, error) {
-	tmpDir, err := ioutil.TempDir(cniDirPrefix, "dhcp")
+	tmpDir, err := os.MkdirTemp(cniDirPrefix, "dhcp")
 	if err == nil {
 		tmpDir = filepath.ToSlash(tmpDir)
 	}

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
@@ -61,7 +67,76 @@ type DHCPLease struct {
 	broadcast     bool
 	stopping      uint32
 	stop          chan struct{}
+	check         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
@@ -69,15 +144,19 @@ 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)
 	l := &DHCPLease{
-		clientID:  clientID,
-		stop:      make(chan struct{}),
-		timeout:   timeout,
-		resendMax: resendMax,
-		broadcast: broadcast,
+		clientID:       clientID,
+		stop:           make(chan struct{}),
+		check:          make(chan struct{}),
+		timeout:        timeout,
+		resendMax:      resendMax,
+		broadcast:      broadcast,
+		optsRequesting: optsRequesting,
+		optsProviding:  optsProviding,
 	}
 
 	log.Printf("%v: acquiring lease", clientID)
@@ -123,6 +202,34 @@ func (l *DHCPLease) Stop() {
 	l.wg.Wait()
 }
 
+func (l *DHCPLease) Check() {
+	l.check <- struct{}{}
+}
+
+func (l *DHCPLease) getOptionsWithClientId() dhcp4.Options {
+	opts := make(dhcp4.Options)
+	opts[dhcp4.OptionClientIdentifier] = []byte(l.clientID)
+	// client identifier's first byte is "type"
+	newClientID := []byte{0}
+	newClientID = append(newClientID, opts[dhcp4.OptionClientIdentifier]...)
+	opts[dhcp4.OptionClientIdentifier] = newClientID
+	return opts
+}
+
+func (l *DHCPLease) getAllOptions() dhcp4.Options {
+	opts := l.getOptionsWithClientId()
+
+	for k, v := range l.optsProviding {
+		opts[k] = v
+	}
+
+	opts[dhcp4.OptionParameterRequestList] = []byte{}
+	for k := range l.optsRequesting {
+		opts[dhcp4.OptionParameterRequestList] = append(opts[dhcp4.OptionParameterRequestList], byte(k))
+	}
+	return opts
+}
+
 func (l *DHCPLease) acquire() error {
 	c, err := newDHCPClient(l.link, l.clientID, l.timeout, l.broadcast)
 	if err != nil {
@@ -137,9 +244,7 @@ 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 := l.getAllOptions()
 
 	pkt, err := backoffRetry(l.resendMax, func() (*dhcp4.Packet, error) {
 		ok, ack, err := DhcpRequest(c, opts)
@@ -209,7 +314,7 @@ func (l *DHCPLease) maintain() {
 				log.Printf("%v: %v", l.clientID, err)
 
 				if time.Now().After(l.rebindingTime) {
-					log.Printf("%v: renawal time expired, rebinding", l.clientID)
+					log.Printf("%v: renewal time expired, rebinding", l.clientID)
 					state = leaseStateRebinding
 				}
 			} else {
@@ -235,6 +340,9 @@ func (l *DHCPLease) maintain() {
 		select {
 		case <-time.After(sleepDur):
 
+		case <-l.check:
+			log.Printf("%v: Checking lease", l.clientID)
+
 		case <-l.stop:
 			if err := l.release(); err != nil {
 				log.Printf("%v: failed to release DHCP lease: %v", l.clientID, err)
@@ -257,9 +365,7 @@ func (l *DHCPLease) renew() error {
 	}
 	defer c.Close()
 
-	opts := make(dhcp4.Options)
-	opts[dhcp4.OptionClientIdentifier] = []byte(l.clientID)
-
+	opts := l.getAllOptions()
 	pkt, err := backoffRetry(l.resendMax, func() (*dhcp4.Packet, error) {
 		ok, ack, err := DhcpRenew(c, *l.ack, opts)
 		switch {
@@ -288,8 +394,7 @@ func (l *DHCPLease) release() error {
 	}
 	defer c.Close()
 
-	opts := make(dhcp4.Options)
-	opts[dhcp4.OptionClientIdentifier] = []byte(l.clientID)
+	opts := l.getOptionsWithClientId()
 
 	if err = DhcpRelease(c, *l.ack, opts); err != nil {
 		return fmt.Errorf("failed to send DHCPRELEASE")
@@ -345,7 +450,7 @@ 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 +459,21 @@ func backoffRetry(resendMax time.Duration, f func() (*dhcp4.Packet, error)) (*dh
 
 		log.Print(err)
 
-		sleepTime = baseDelay + jitter(time.Second)
+		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/disk/backend.go

@@ -15,7 +15,6 @@
 package disk
 
 import (
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -77,7 +76,7 @@ func (s *Store) Reserve(id string, ifname string, ip net.IP, rangeID string) (bo
 	}
 	// store the reserved ip in lastIPFile
 	ipfile := GetEscapedPath(s.dataDir, lastIPFilePrefix+rangeID)
-	err = ioutil.WriteFile(ipfile, []byte(ip.String()), 0644)
+	err = os.WriteFile(ipfile, []byte(ip.String()), 0644)
 	if err != nil {
 		return false, err
 	}
@@ -87,17 +86,13 @@ func (s *Store) Reserve(id string, ifname string, ip net.IP, rangeID string) (bo
 // LastReservedIP returns the last reserved IP if exists
 func (s *Store) LastReservedIP(rangeID string) (net.IP, error) {
 	ipfile := GetEscapedPath(s.dataDir, lastIPFilePrefix+rangeID)
-	data, err := ioutil.ReadFile(ipfile)
+	data, err := os.ReadFile(ipfile)
 	if err != nil {
 		return nil, err
 	}
 	return net.ParseIP(string(data)), nil
 }
 
-func (s *Store) Release(ip net.IP) error {
-	return os.Remove(GetEscapedPath(s.dataDir, ip.String()))
-}
-
 func (s *Store) FindByKey(id string, ifname string, match string) (bool, error) {
 	found := false
 
@@ -105,7 +100,7 @@ func (s *Store) FindByKey(id string, ifname string, match string) (bool, error)
 		if err != nil || info.IsDir() {
 			return nil
 		}
-		data, err := ioutil.ReadFile(path)
+		data, err := os.ReadFile(path)
 		if err != nil {
 			return nil
 		}
@@ -141,7 +136,7 @@ func (s *Store) ReleaseByKey(id string, ifname string, match string) (bool, erro
 		if err != nil || info.IsDir() {
 			return nil
 		}
-		data, err := ioutil.ReadFile(path)
+		data, err := os.ReadFile(path)
 		if err != nil {
 			return nil
 		}
@@ -185,7 +180,7 @@ func (s *Store) GetByID(id string, ifname string) []net.IP {
 		if err != nil || info.IsDir() {
 			return nil
 		}
-		data, err := ioutil.ReadFile(path)
+		data, err := os.ReadFile(path)
 		if err != nil {
 			return nil
 		}

plugins/ipam/host-local/backend/disk/lock_test.go

@@ -15,7 +15,6 @@
 package disk
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -25,7 +24,7 @@ import (
 
 var _ = Describe("Lock Operations", func() {
 	It("locks a file path", func() {
-		dir, err := ioutil.TempDir("", "")
+		dir, err := os.MkdirTemp("", "")
 		Expect(err).ToNot(HaveOccurred())
 		defer os.RemoveAll(dir)
 
@@ -47,7 +46,7 @@ var _ = Describe("Lock Operations", func() {
 	})
 
 	It("locks a folder path", func() {
-		dir, err := ioutil.TempDir("", "")
+		dir, err := os.MkdirTemp("", "")
 		Expect(err).ToNot(HaveOccurred())
 		defer os.RemoveAll(dir)
 

plugins/ipam/host-local/backend/store.go

@@ -22,7 +22,6 @@ type Store interface {
 	Close() error
 	Reserve(id string, ifname string, ip net.IP, rangeID string) (bool, error)
 	LastReservedIP(rangeID string) (net.IP, error)
-	Release(ip net.IP) error
 	ReleaseByID(id string, ifname string) error
 	GetByID(id string, ifname string) []net.IP
 }

plugins/ipam/host-local/backend/testing/fake_store.go

@@ -63,11 +63,6 @@ func (s *FakeStore) LastReservedIP(rangeID string) (net.IP, error) {
 	return ip, nil
 }
 
-func (s *FakeStore) Release(ip net.IP) error {
-	delete(s.ipMap, ip.String())
-	return nil
-}
-
 func (s *FakeStore) ReleaseByID(id string, ifname string) error {
 	toDelete := []string{}
 	for k, v := range s.ipMap {

plugins/ipam/host-local/dns_test.go

@@ -15,7 +15,6 @@
 package main
 
 import (
-	"io/ioutil"
 	"os"
 
 	"github.com/containernetworking/cni/pkg/types"
@@ -64,7 +63,7 @@ options four
 })
 
 func parse(contents string) (*types.DNS, error) {
-	f, err := ioutil.TempFile("", "host_local_resolv")
+	f, err := os.CreateTemp("", "host_local_resolv")
 	if err != nil {
 		return nil, err
 	}

plugins/ipam/host-local/host_local_test.go

@@ -16,7 +16,6 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -24,7 +23,7 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
 	"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/disk"
@@ -43,7 +42,7 @@ var _ = Describe("host-local Operations", func() {
 
 	BeforeEach(func() {
 		var err error
-		tmpDir, err = ioutil.TempDir("", "host-local_test")
+		tmpDir, err = os.MkdirTemp("", "host-local_test")
 		Expect(err).NotTo(HaveOccurred())
 		tmpDir = filepath.ToSlash(tmpDir)
 	})
@@ -58,7 +57,7 @@ var _ = Describe("host-local Operations", func() {
 		ver := ver
 
 		It(fmt.Sprintf("[%s] allocates and releases addresses with ADD/DEL", ver), func() {
-			err := ioutil.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
+			err := os.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
 			Expect(err).NotTo(HaveOccurred())
 
 			conf := fmt.Sprintf(`{
@@ -134,22 +133,22 @@ var _ = Describe("host-local Operations", func() {
 			}
 
 			ipFilePath1 := filepath.Join(tmpDir, "mynet", "10.1.2.2")
-			contents, err := ioutil.ReadFile(ipFilePath1)
+			contents, err := os.ReadFile(ipFilePath1)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal(args.ContainerID + LineBreak + ifname))
 
 			ipFilePath2 := filepath.Join(tmpDir, disk.GetEscapedPath("mynet", "2001:db8:1::2"))
-			contents, err = ioutil.ReadFile(ipFilePath2)
+			contents, err = os.ReadFile(ipFilePath2)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal(args.ContainerID + LineBreak + ifname))
 
 			lastFilePath1 := filepath.Join(tmpDir, "mynet", "last_reserved_ip.0")
-			contents, err = ioutil.ReadFile(lastFilePath1)
+			contents, err = os.ReadFile(lastFilePath1)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal("10.1.2.2"))
 
 			lastFilePath2 := filepath.Join(tmpDir, "mynet", "last_reserved_ip.1")
-			contents, err = ioutil.ReadFile(lastFilePath2)
+			contents, err = os.ReadFile(lastFilePath2)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal("2001:db8:1::2"))
 			// Release the IP
@@ -167,7 +166,7 @@ var _ = Describe("host-local Operations", func() {
 		It(fmt.Sprintf("[%s] allocates and releases addresses on specific interface with ADD/DEL", ver), func() {
 			const ifname1 string = "eth1"
 
-			err := ioutil.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
+			err := os.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
 			Expect(err).NotTo(HaveOccurred())
 
 			conf0 := fmt.Sprintf(`{
@@ -239,12 +238,12 @@ var _ = Describe("host-local Operations", func() {
 			Expect(err).NotTo(HaveOccurred())
 
 			ipFilePath0 := filepath.Join(tmpDir, "mynet0", "10.1.2.2")
-			contents, err := ioutil.ReadFile(ipFilePath0)
+			contents, err := os.ReadFile(ipFilePath0)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal(args0.ContainerID + LineBreak + ifname))
 
 			ipFilePath1 := filepath.Join(tmpDir, "mynet1", "10.2.2.2")
-			contents, err = ioutil.ReadFile(ipFilePath1)
+			contents, err = os.ReadFile(ipFilePath1)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal(args1.ContainerID + LineBreak + ifname1))
 
@@ -257,7 +256,7 @@ var _ = Describe("host-local Operations", func() {
 			Expect(err).To(HaveOccurred())
 
 			// reread ipFilePath1, ensure that ifname1 didn't get deleted
-			contents, err = ioutil.ReadFile(ipFilePath1)
+			contents, err = os.ReadFile(ipFilePath1)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal(args1.ContainerID + LineBreak + ifname1))
 
@@ -357,7 +356,7 @@ var _ = Describe("host-local Operations", func() {
 		})
 
 		It(fmt.Sprintf("[%s] verify DEL works on backwards compatible allocate", ver), func() {
-			err := ioutil.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
+			err := os.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
 			Expect(err).NotTo(HaveOccurred())
 
 			conf := fmt.Sprintf(`{
@@ -395,10 +394,10 @@ var _ = Describe("host-local Operations", func() {
 			Expect(err).NotTo(HaveOccurred())
 
 			ipFilePath := filepath.Join(tmpDir, "mynet", "10.1.2.2")
-			contents, err := ioutil.ReadFile(ipFilePath)
+			contents, err := os.ReadFile(ipFilePath)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal(args.ContainerID + LineBreak + ifname))
-			err = ioutil.WriteFile(ipFilePath, []byte(strings.TrimSpace(args.ContainerID)), 0644)
+			err = os.WriteFile(ipFilePath, []byte(strings.TrimSpace(args.ContainerID)), 0644)
 			Expect(err).NotTo(HaveOccurred())
 
 			err = testutils.CmdDelWithArgs(args, func() error {
@@ -466,7 +465,7 @@ var _ = Describe("host-local Operations", func() {
 			Expect(err).NotTo(HaveOccurred())
 
 			ipFilePath := filepath.Join(tmpDir, "mynet", result.IPs[0].Address.IP.String())
-			contents, err := ioutil.ReadFile(ipFilePath)
+			contents, err := os.ReadFile(ipFilePath)
 			Expect(err).NotTo(HaveOccurred())
 			Expect(string(contents)).To(Equal("dummy" + LineBreak + ifname))
 
@@ -547,7 +546,7 @@ var _ = Describe("host-local Operations", func() {
 		})
 
 		It(fmt.Sprintf("[%s] allocates custom IPs from multiple ranges", ver), func() {
-			err := ioutil.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
+			err := os.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
 			Expect(err).NotTo(HaveOccurred())
 
 			conf := fmt.Sprintf(`{
@@ -595,7 +594,7 @@ var _ = Describe("host-local Operations", func() {
 		})
 
 		It(fmt.Sprintf("[%s] allocates custom IPs from multiple protocols", ver), func() {
-			err := ioutil.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
+			err := os.WriteFile(filepath.Join(tmpDir, "resolv.conf"), []byte("nameserver 192.0.2.3"), 0644)
 			Expect(err).NotTo(HaveOccurred())
 
 			conf := fmt.Sprintf(`{

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 {
-			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addr})
+		for _, addrStr := range n.Args.A.IPs {
+			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 {
-			n.IPAM.Addresses = append(n.IPAM.Addresses, Address{AddressStr: addr})
+		for _, addrStr := range n.RuntimeConfig.IPs {
+			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 {
-		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)
+		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(
+					"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
 		}
-		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/linux_only.txt

@@ -6,6 +6,7 @@ plugins/main/loopback
 plugins/main/macvlan
 plugins/main/ptp
 plugins/main/vlan
+plugins/main/dummy
 plugins/meta/portmap
 plugins/meta/tuning
 plugins/meta/bandwidth

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 +55,8 @@ 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"`
@@ -124,8 +126,8 @@ func loadNetConf(bytes []byte, envArgs string) (*NetConf, string, error) {
 
 // calcGateways processes the results from the IPAM plugin and does the
 // following for each IP family:
-//    - Calculates and compiles a list of gateway addresses
-//    - Adds a default route if needed
+//   - Calculates and compiles a list of gateway addresses
+//   - Adds a default route if needed
 func calcGateways(result *current.Result, n *NetConf) (*gwInfo, *gwInfo, error) {
 
 	gwsV4 := &gwInfo{}
@@ -321,6 +323,11 @@ 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
@@ -379,10 +386,7 @@ func calcGatewayIP(ipn *net.IPNet) net.IP {
 }
 
 func setupBridge(n *NetConf) (*netlink.Bridge, *current.Interface, error) {
-	vlanFiltering := false
-	if n.Vlan != 0 {
-		vlanFiltering = true
-	}
+	vlanFiltering := n.Vlan != 0
 	// create bridge if necessary
 	br, err := ensureBridge(n.BrName, n.MTU, n.PromiscMode, vlanFiltering)
 	if err != nil {
@@ -395,20 +399,6 @@ 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()
@@ -460,6 +450,20 @@ 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)
@@ -482,6 +486,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 		result.IPs = ipamResult.IPs
 		result.Routes = ipamResult.Routes
+		result.DNS = ipamResult.DNS
 
 		if len(result.IPs) == 0 {
 			return errors.New("IPAM plugin returned missing IP config")
@@ -495,17 +500,13 @@ 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
-			// bridge. Hairpin mode causes echos of neighbor solicitation
-			// packets, which causes DAD failures.
-			for _, ipc := range result.IPs {
-				if ipc.Address.IP.To4() == nil && (n.HairpinMode || n.PromiscMode) {
-					if err := disableIPV6DAD(args.IfName); err != nil {
-						return err
-					}
-					break
-				}
+			if n.EnableDad {
+				_, _ = sysctl.Sysctl(fmt.Sprintf("/net/ipv6/conf/%s/enhanced_dad", args.IfName), "1")
+				_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv6/conf/%s/accept_dad", args.IfName), "1")
+			} else {
+				_, _ = sysctl.Sysctl(fmt.Sprintf("net/ipv6/conf/%s/accept_dad", args.IfName), "0")
 			}
+			_, _ = 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 {
@@ -516,41 +517,6 @@ func cmdAdd(args *skel.CmdArgs) error {
 			return err
 		}
 
-		// check bridge port state
-		retries := []int{0, 50, 500, 1000, 1000}
-		for idx, sleep := range retries {
-			time.Sleep(time.Duration(sleep) * time.Millisecond)
-
-			hostVeth, err := netlink.LinkByName(hostInterface.Name)
-			if err != nil {
-				return err
-			}
-			if hostVeth.Attrs().OperState == netlink.OperUp {
-				break
-			}
-
-			if idx == len(retries)-1 {
-				return fmt.Errorf("bridge port in error state: %s", hostVeth.Attrs().OperState)
-			}
-		}
-
-		// 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
@@ -601,8 +567,45 @@ 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
+		}
 	}
 
+	var hostVeth netlink.Link
+
+	// check bridge port state
+	retries := []int{0, 50, 500, 1000, 1000}
+	for idx, sleep := range retries {
+		time.Sleep(time.Duration(sleep) * time.Millisecond)
+
+		hostVeth, err = netlink.LinkByName(hostInterface.Name)
+		if err != nil {
+			return err
+		}
+		if hostVeth.Attrs().OperState == netlink.OperUp {
+			break
+		}
+
+		if idx == len(retries)-1 {
+			return fmt.Errorf("bridge port in error state: %s", hostVeth.Attrs().OperState)
+		}
+	}
+
+	// In certain circumstances, the host-side of the veth may change addrs
+	hostInterface.Mac = hostVeth.Attrs().HardwareAddr.String()
+
 	// Refetch the bridge since its MAC address may change when the first
 	// veth is added or after its IP address is set
 	br, err = bridgeByName(n.BrName)
@@ -611,18 +614,29 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 	brInterface.Mac = br.Attrs().HardwareAddr.String()
 
-	result.DNS = n.DNS
-
 	// Return an error requested by testcases, if any
 	if debugPostIPAMError != nil {
 		return debugPostIPAMError
 	}
 
+	// Use incoming DNS settings if provided, otherwise use the
+	// settings that were already configued by the IPAM plugin
+	if dnsConfSet(n.DNS) {
+		result.DNS = n.DNS
+	}
+
 	success = true
 
 	return types.PrintResult(result, cniVersion)
 }
 
+func dnsConfSet(dnsConf types.DNS) bool {
+	return dnsConf.Nameservers != nil ||
+		dnsConf.Search != nil ||
+		dnsConf.Options != nil ||
+		dnsConf.Domain != ""
+}
+
 func cmdDel(args *skel.CmdArgs) error {
 	n, _, err := loadNetConf(args.StdinData, args.Args)
 	if err != nil {
@@ -631,14 +645,17 @@ func cmdDel(args *skel.CmdArgs) error {
 
 	isLayer3 := n.IPAM.Type != ""
 
-	if isLayer3 {
-		if err := ipam.ExecDel(n.IPAM.Type, args.StdinData); err != nil {
-			return err
+	ipamDel := func() error {
+		if isLayer3 {
+			if err := ipam.ExecDel(n.IPAM.Type, args.StdinData); err != nil {
+				return err
+			}
 		}
+		return nil
 	}
 
 	if args.Netns == "" {
-		return nil
+		return ipamDel()
 	}
 
 	// There is a netns so try to clean up. Delete can be called multiple times
@@ -655,9 +672,28 @@ 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 ipamDel()
+		}
 		return err
 	}
 
+	// call ipam.ExecDel after clean up device in netns
+	if err := ipamDel(); err != 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)
@@ -938,3 +974,7 @@ func cmdCheck(args *skel.CmdArgs) error {
 
 	return nil
 }
+
+func uniqueID(containerID, cniIface string) string {
+	return containerID + "-" + cniIface
+}

plugins/main/bridge/bridge_test.go

@@ -17,18 +17,18 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"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"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	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"
@@ -44,6 +44,7 @@ const (
 	BRNAME     = "bridge0"
 	BRNAMEVLAN = "bridge0.100"
 	IFNAME     = "eth0"
+	NAMESERVER = "192.0.2.0"
 )
 
 type Net struct {
@@ -65,19 +66,21 @@ type Net struct {
 // testCase defines the CNI network configuration and the expected
 // bridge addresses for a test case.
 type testCase struct {
-	cniVersion string      // CNI Version
-	subnet     string      // Single subnet config: Subnet CIDR
-	gateway    string      // Single subnet config: Gateway
-	ranges     []rangeInfo // Ranges list (multiple subnets config)
-	isGW       bool
-	isLayer2   bool
-	expGWCIDRs []string // Expected gateway addresses in CIDR form
-	vlan       int
-	ipMasq     bool
-	AddErr020  string
-	DelErr020  string
-	AddErr010  string
-	DelErr010  string
+	cniVersion  string      // CNI Version
+	subnet      string      // Single subnet config: Subnet CIDR
+	gateway     string      // Single subnet config: Gateway
+	ranges      []rangeInfo // Ranges list (multiple subnets config)
+	resolvConf  string      // host-local resolvConf file path
+	isGW        bool
+	isLayer2    bool
+	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 {
@@ -137,6 +140,9 @@ const (
 	ipamDataDirStr = `,
         "dataDir": "%s"`
 
+	ipamResolvConfStr = `,
+		"resolvConf": "%s"`
+
 	ipMasqConfStr = `,
 	"ipMasq": %t`
 
@@ -164,6 +170,9 @@ const (
 	ipamEndStr = `
     }`
 
+	macspoofchkFormat = `,
+        "macspoofchk": %t`
+
 	argsFormat = `,
     "args": {
         "cni": {
@@ -193,6 +202,9 @@ func (tc testCase) netConfJSON(dataDir string) string {
 	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
@@ -207,6 +219,9 @@ func (tc testCase) netConfJSON(dataDir string) string {
 			if tc.ranges != nil {
 				conf += tc.rangesConfig()
 			}
+			if tc.resolvConf != "" {
+				conf += tc.resolvConfConfig()
+			}
 			conf += ipamEndStr
 		}
 	} else {
@@ -244,6 +259,26 @@ func (tc testCase) rangesConfig() string {
 	return conf + rangesEndStr
 }
 
+func (tc testCase) resolvConfConfig() string {
+	conf := fmt.Sprintf(ipamResolvConfStr, tc.resolvConf)
+	return conf
+}
+
+func newResolvConf() (string, error) {
+	f, err := os.CreateTemp("", "host_local_resolv")
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+	name := f.Name()
+	_, err = f.WriteString(fmt.Sprintf("nameserver %s", NAMESERVER))
+	return name, err
+}
+
+func deleteResolvConf(path string) error {
+	return os.Remove(path)
+}
+
 var counter uint
 
 // createCmdArgs generates network configuration and creates command
@@ -361,16 +396,16 @@ func ipVersion(ip net.IP) string {
 
 func countIPAMIPs(path string) (int, error) {
 	count := 0
-	files, err := ioutil.ReadDir(path)
+	entries, err := os.ReadDir(path)
 	if err != nil {
 		return -1, err
 	}
-	for _, file := range files {
-		if file.IsDir() {
+	for _, entry := range entries {
+		if entry.IsDir() {
 			continue
 		}
 
-		if net.ParseIP(file.Name()) != nil {
+		if net.ParseIP(entry.Name()) != nil {
 			count++
 		}
 	}
@@ -557,6 +592,11 @@ func (tester *testerV10x) cmdAddTest(tc testCase, dataDir string) (types.Result,
 			Expect(link.Attrs().HardwareAddr.String()).NotTo(Equal(bridgeMAC))
 		}
 
+		// Check that resolvConf was used properly
+		if !tc.isLayer2 && tc.resolvConf != "" {
+			Expect(result.DNS.Nameservers).To(Equal([]string{NAMESERVER}))
+		}
+
 		return nil
 	})
 	Expect(err).NotTo(HaveOccurred())
@@ -1579,6 +1619,9 @@ var _ = Describe("bridge Operations", func() {
 	var originalNS, targetNS ns.NetNS
 	var dataDir string
 
+	resolvConf, err := newResolvConf()
+	Expect(err).NotTo(HaveOccurred())
+
 	BeforeEach(func() {
 		// Create a new NetNS so we don't modify the host
 		var err error
@@ -1587,7 +1630,7 @@ var _ = Describe("bridge Operations", func() {
 		targetNS, err = testutils.NewNS()
 		Expect(err).NotTo(HaveOccurred())
 
-		dataDir, err = ioutil.TempDir("", "bridge_test")
+		dataDir, err = os.MkdirTemp("", "bridge_test")
 		Expect(err).NotTo(HaveOccurred())
 
 		// Do not emulate an error, each test will set this if needed
@@ -1602,6 +1645,10 @@ var _ = Describe("bridge Operations", func() {
 		Expect(testutils.UnmountNS(targetNS)).To(Succeed())
 	})
 
+	AfterSuite(func() {
+		deleteResolvConf(resolvConf)
+	})
+
 	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.
@@ -1698,6 +1745,12 @@ var _ = Describe("bridge Operations", func() {
 				AddErr010: "CNI version 0.1.0 does not support more than 1 address per family",
 				DelErr010: "CNI version 0.1.0 does not support more than 1 address per family",
 			},
+			{
+				// with resolvConf DNS settings
+				subnet:     "10.1.2.0/24",
+				expGWCIDRs: []string{"10.1.2.1/24"},
+				resolvConf: resolvConf,
+			},
 		} {
 			tc := tc
 			i := i
@@ -2175,6 +2228,35 @@ 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() {
@@ -2211,3 +2293,50 @@ 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/dummy/README.md

@@ -0,0 +1,39 @@
+---
+title: dummy plugin
+description: "plugins/main/dummy/README.md"
+date: 2022-05-12
+toc: true
+draft: true
+weight: 200
+---
+
+## Overview
+
+dummy is a useful feature for routing packets through the Linux kernel without transmitting.
+
+Like loopback, it is a purely virtual interface that allows packets to be routed to a designated IP address. Unlike loopback, the IP address can be arbitrary and is not restricted to the `127.0.0.0/8` range.
+
+## Example configuration
+
+```json
+{
+	"name": "mynet",
+	"type": "dummy",
+	"ipam": {
+		"type": "host-local",
+		"subnet": "10.1.2.0/24"
+	}
+}
+```
+
+## Network configuration reference
+
+* `name` (string, required): the name of the network.
+* `type` (string, required): "dummy".
+* `ipam` (dictionary, required): IPAM configuration to be used for this network.
+
+## Notes
+
+* `dummy` does not transmit packets.
+Therefore the container will not be able to reach any external network.
+This solution is designed to be used in conjunction with other CNI plugins (e.g., `bridge`) to provide an internal non-loopback address for applications to use.

plugins/main/dummy/dummy.go

@@ -0,0 +1,300 @@
+// Copyright 2022 Arista Networks
+//
+// 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"
+	"errors"
+	"fmt"
+	"net"
+
+	"github.com/vishvananda/netlink"
+
+	"github.com/containernetworking/cni/pkg/skel"
+	"github.com/containernetworking/cni/pkg/types"
+	current "github.com/containernetworking/cni/pkg/types/100"
+	"github.com/containernetworking/cni/pkg/version"
+
+	"github.com/containernetworking/plugins/pkg/ip"
+	"github.com/containernetworking/plugins/pkg/ipam"
+	"github.com/containernetworking/plugins/pkg/ns"
+	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
+)
+
+func parseNetConf(bytes []byte) (*types.NetConf, error) {
+	conf := &types.NetConf{}
+	if err := json.Unmarshal(bytes, conf); err != nil {
+		return nil, fmt.Errorf("failed to parse network config: %v", err)
+	}
+	return conf, nil
+}
+
+func createDummy(conf *types.NetConf, ifName string, netns ns.NetNS) (*current.Interface, error) {
+
+	dummy := &current.Interface{}
+
+	dm := &netlink.Dummy{
+		LinkAttrs: netlink.LinkAttrs{
+			Name:      ifName,
+			Namespace: netlink.NsFd(int(netns.Fd())),
+		},
+	}
+
+	if err := netlink.LinkAdd(dm); err != nil {
+		return nil, fmt.Errorf("failed to create dummy: %v", err)
+	}
+	dummy.Name = ifName
+
+	err := netns.Do(func(_ ns.NetNS) error {
+		// Re-fetch interface to get all properties/attributes
+		contDummy, err := netlink.LinkByName(ifName)
+		if err != nil {
+			return fmt.Errorf("failed to fetch dummy%q: %v", ifName, err)
+		}
+
+		dummy.Mac = contDummy.Attrs().HardwareAddr.String()
+		dummy.Sandbox = netns.Path()
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return dummy, nil
+}
+
+func cmdAdd(args *skel.CmdArgs) error {
+	conf, err := parseNetConf(args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	if conf.IPAM.Type == "" {
+		return errors.New("dummy interface requires an IPAM configuration")
+	}
+
+	netns, err := ns.GetNS(args.Netns)
+	if err != nil {
+		return fmt.Errorf("failed to open netns %q: %v", netns, err)
+	}
+	defer netns.Close()
+
+	dummyInterface, err := createDummy(conf, args.IfName, netns)
+	if err != nil {
+		return err
+	}
+
+	// Delete link if err to avoid link leak in this ns
+	defer func() {
+		if err != nil {
+			netns.Do(func(_ ns.NetNS) error {
+				return ip.DelLinkByName(args.IfName)
+			})
+		}
+	}()
+
+	r, err := ipam.ExecAdd(conf.IPAM.Type, args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	// defer ipam deletion to avoid ip leak
+	defer func() {
+		if err != nil {
+			ipam.ExecDel(conf.IPAM.Type, args.StdinData)
+		}
+	}()
+
+	// convert IPAMResult to current Result type
+	result, err := current.NewResultFromResult(r)
+	if err != nil {
+		return err
+	}
+
+	if len(result.IPs) == 0 {
+		return errors.New("IPAM plugin returned missing IP config")
+	}
+
+	for _, ipc := range result.IPs {
+		// all addresses apply to the container dummy interface
+		ipc.Interface = current.Int(0)
+	}
+
+	result.Interfaces = []*current.Interface{dummyInterface}
+
+	err = netns.Do(func(_ ns.NetNS) error {
+		if err := ipam.ConfigureIface(args.IfName, result); err != nil {
+			return err
+		}
+		return nil
+	})
+
+	if err != nil {
+		return err
+	}
+
+	return types.PrintResult(result, conf.CNIVersion)
+}
+
+func cmdDel(args *skel.CmdArgs) error {
+	conf, err := parseNetConf(args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	if err = ipam.ExecDel(conf.IPAM.Type, args.StdinData); err != nil {
+		return err
+	}
+
+	if args.Netns == "" {
+		return nil
+	}
+
+	err = ns.WithNetNSPath(args.Netns, func(ns.NetNS) error {
+		err = ip.DelLinkByName(args.IfName)
+		if err != nil && err == ip.ErrLinkNotFound {
+			return nil
+		}
+		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 nil
+}
+
+func main() {
+	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, version.All, bv.BuildString("dummy"))
+}
+
+func cmdCheck(args *skel.CmdArgs) error {
+	conf, err := parseNetConf(args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	if conf.IPAM.Type == "" {
+		return errors.New("dummy interface requires an IPAM configuration")
+	}
+
+	netns, err := ns.GetNS(args.Netns)
+	if err != nil {
+		return fmt.Errorf("failed to open netns %q: %v", args.Netns, err)
+	}
+	defer netns.Close()
+
+	// run the IPAM plugin and get back the config to apply
+	err = ipam.ExecCheck(conf.IPAM.Type, args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	if conf.RawPrevResult == nil {
+		return fmt.Errorf("dummy: Required prevResult missing")
+	}
+
+	if err := version.ParsePrevResult(conf); err != nil {
+		return err
+	}
+
+	// Convert whatever the IPAM result was into the current Result type
+	result, err := current.NewResultFromResult(conf.PrevResult)
+	if err != nil {
+		return err
+	}
+
+	var contMap current.Interface
+	// Find interfaces for name whe know, that of dummy device inside container
+	for _, intf := range result.Interfaces {
+		if args.IfName == intf.Name {
+			if args.Netns == intf.Sandbox {
+				contMap = *intf
+				continue
+			}
+		}
+	}
+
+	// The namespace must be the same as what was configured
+	if args.Netns != contMap.Sandbox {
+		return fmt.Errorf("Sandbox in prevResult %s doesn't match configured netns: %s",
+			contMap.Sandbox, args.Netns)
+	}
+
+	//
+	// Check prevResults for ips, routes and dns against values found in the container
+	if err := netns.Do(func(_ ns.NetNS) error {
+
+		// Check interface against values found in the container
+		err := validateCniContainerInterface(contMap)
+		if err != nil {
+			return err
+		}
+
+		err = ip.ValidateExpectedInterfaceIPs(args.IfName, result.IPs)
+		if err != nil {
+			return err
+		}
+		return nil
+	}); err != nil {
+		return err
+	}
+
+	return nil
+
+}
+
+func validateCniContainerInterface(intf current.Interface) error {
+
+	var link netlink.Link
+	var err error
+
+	if intf.Name == "" {
+		return fmt.Errorf("Container interface name missing in prevResult: %v", intf.Name)
+	}
+	link, err = netlink.LinkByName(intf.Name)
+	if err != nil {
+		return fmt.Errorf("Container Interface name in prevResult: %s not found", intf.Name)
+	}
+	if intf.Sandbox == "" {
+		return fmt.Errorf("Error: Container interface %s should not be in host namespace", link.Attrs().Name)
+	}
+
+	_, isDummy := link.(*netlink.Dummy)
+	if !isDummy {
+		return fmt.Errorf("Error: Container interface %s not of type dummy", link.Attrs().Name)
+	}
+
+	if intf.Mac != "" {
+		if intf.Mac != link.Attrs().HardwareAddr.String() {
+			return fmt.Errorf("Interface %s Mac %s doesn't match container Mac: %s", intf.Name, intf.Mac, link.Attrs().HardwareAddr)
+		}
+	}
+
+	if link.Attrs().Flags&net.FlagUp != net.FlagUp {
+		return fmt.Errorf("Interface %s is down", intf.Name)
+	}
+
+	return nil
+}

plugins/main/dummy/dummy_suite_test.go

@@ -0,0 +1,41 @@
+// Copyright 2022 Arista Networks
+//
+// 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_test
+
+import (
+	"github.com/onsi/gomega/gexec"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	"testing"
+)
+
+var pathToLoPlugin string
+
+func TestLoopback(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "plugins/main/dummy")
+}
+
+var _ = BeforeSuite(func() {
+	var err error
+	pathToLoPlugin, err = gexec.Build("github.com/containernetworking/plugins/plugins/main/dummy")
+	Expect(err).NotTo(HaveOccurred())
+})
+
+var _ = AfterSuite(func() {
+	gexec.CleanupBuildArtifacts()
+})

plugins/main/dummy/dummy_test.go

@@ -0,0 +1,391 @@
+// Copyright 2022 Arista Networks
+//
+// 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"
+	"errors"
+	"fmt"
+	"net"
+	"os"
+	"strings"
+	"syscall"
+
+	"github.com/containernetworking/cni/pkg/skel"
+	"github.com/containernetworking/cni/pkg/types"
+	types020 "github.com/containernetworking/cni/pkg/types/020"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
+	"github.com/containernetworking/plugins/pkg/ns"
+	"github.com/containernetworking/plugins/pkg/testutils"
+	"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
+
+	"github.com/vishvananda/netlink"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+const MASTER_NAME = "eth0"
+
+type Net struct {
+	Name          string                 `json:"name"`
+	CNIVersion    string                 `json:"cniVersion"`
+	Type          string                 `json:"type,omitempty"`
+	IPAM          *allocator.IPAMConfig  `json:"ipam"`
+	RawPrevResult map[string]interface{} `json:"prevResult,omitempty"`
+	PrevResult    types100.Result        `json:"-"`
+}
+
+func buildOneConfig(netName string, cniVersion string, orig *Net, prevResult types.Result) (*Net, error) {
+	var err error
+
+	inject := map[string]interface{}{
+		"name":       netName,
+		"cniVersion": cniVersion,
+	}
+	// Add previous plugin result
+	if prevResult != nil {
+		inject["prevResult"] = prevResult
+	}
+
+	// Ensure every config uses the same name and version
+	config := make(map[string]interface{})
+
+	confBytes, err := json.Marshal(orig)
+	if err != nil {
+		return nil, err
+	}
+
+	err = json.Unmarshal(confBytes, &config)
+	if err != nil {
+		return nil, fmt.Errorf("unmarshal existing network bytes: %s", err)
+	}
+
+	for key, value := range inject {
+		config[key] = value
+	}
+
+	newBytes, err := json.Marshal(config)
+	if err != nil {
+		return nil, err
+	}
+
+	conf := &Net{}
+	if err := json.Unmarshal(newBytes, &conf); err != nil {
+		return nil, fmt.Errorf("error parsing configuration: %s", err)
+	}
+
+	return conf, nil
+
+}
+
+type tester interface {
+	// verifyResult minimally verifies the Result and returns the interface's MAC address
+	verifyResult(result types.Result, name string) string
+}
+
+type testerBase struct{}
+
+type testerV10x testerBase
+type testerV04x testerBase
+type testerV03x testerBase
+type testerV01xOr02x testerBase
+
+func newTesterByVersion(version string) tester {
+	switch {
+	case strings.HasPrefix(version, "1.0."):
+		return &testerV10x{}
+	case strings.HasPrefix(version, "0.4."):
+		return &testerV04x{}
+	case strings.HasPrefix(version, "0.3."):
+		return &testerV03x{}
+	default:
+		return &testerV01xOr02x{}
+	}
+}
+
+// verifyResult minimally verifies the Result and returns the interface's MAC address
+func (t *testerV10x) verifyResult(result types.Result, name string) string {
+	r, err := types100.GetResult(result)
+	Expect(err).NotTo(HaveOccurred())
+
+	Expect(len(r.Interfaces)).To(Equal(1))
+	Expect(r.Interfaces[0].Name).To(Equal(name))
+	Expect(len(r.IPs)).To(Equal(1))
+
+	return r.Interfaces[0].Mac
+}
+
+func verify0403(result types.Result, name string) string {
+	r, err := types040.GetResult(result)
+	Expect(err).NotTo(HaveOccurred())
+
+	Expect(len(r.Interfaces)).To(Equal(1))
+	Expect(r.Interfaces[0].Name).To(Equal(name))
+	Expect(len(r.IPs)).To(Equal(1))
+
+	return r.Interfaces[0].Mac
+}
+
+// verifyResult minimally verifies the Result and returns the interface's MAC address
+func (t *testerV04x) verifyResult(result types.Result, name string) string {
+	return verify0403(result, name)
+}
+
+// verifyResult minimally verifies the Result and returns the interface's MAC address
+func (t *testerV03x) verifyResult(result types.Result, name string) string {
+	return verify0403(result, name)
+}
+
+// verifyResult minimally verifies the Result and returns the interface's MAC address
+func (t *testerV01xOr02x) verifyResult(result types.Result, name string) string {
+	r, err := types020.GetResult(result)
+	Expect(err).NotTo(HaveOccurred())
+
+	Expect(r.IP4.IP.IP).NotTo(BeNil())
+	Expect(r.IP6).To(BeNil())
+
+	// 0.2 and earlier don't return MAC address
+	return ""
+}
+
+var _ = Describe("dummy Operations", func() {
+	var originalNS, targetNS ns.NetNS
+	var dataDir string
+
+	BeforeEach(func() {
+		// Create a new NetNS so we don't modify the host
+		var err error
+		originalNS, err = testutils.NewNS()
+		Expect(err).NotTo(HaveOccurred())
+		targetNS, err = testutils.NewNS()
+		Expect(err).NotTo(HaveOccurred())
+
+		dataDir, err = os.MkdirTemp("", "dummy_test")
+		Expect(err).NotTo(HaveOccurred())
+
+		err = originalNS.Do(func(ns.NetNS) error {
+			defer GinkgoRecover()
+
+			// Add master
+			err = netlink.LinkAdd(&netlink.Dummy{
+				LinkAttrs: netlink.LinkAttrs{
+					Name: MASTER_NAME,
+				},
+			})
+			Expect(err).NotTo(HaveOccurred())
+			m, err := netlink.LinkByName(MASTER_NAME)
+			Expect(err).NotTo(HaveOccurred())
+			err = netlink.LinkSetUp(m)
+			Expect(err).NotTo(HaveOccurred())
+			return nil
+		})
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	AfterEach(func() {
+		Expect(os.RemoveAll(dataDir)).To(Succeed())
+		Expect(originalNS.Close()).To(Succeed())
+		Expect(testutils.UnmountNS(originalNS)).To(Succeed())
+		Expect(targetNS.Close()).To(Succeed())
+		Expect(testutils.UnmountNS(targetNS)).To(Succeed())
+	})
+
+	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
+
+		It(fmt.Sprintf("[%s] creates an dummy link in a non-default namespace", ver), func() {
+			conf := &types.NetConf{
+				CNIVersion: ver,
+				Name:       "testConfig",
+				Type:       "dummy",
+			}
+
+			// Create dummy in other namespace
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				_, err := createDummy(conf, "foobar0", targetNS)
+				Expect(err).NotTo(HaveOccurred())
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			// Make sure dummy link exists in the target namespace
+			err = targetNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				link, err := netlink.LinkByName("foobar0")
+				Expect(err).NotTo(HaveOccurred())
+				Expect(link.Attrs().Name).To(Equal("foobar0"))
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] configures and deconfigures a dummy link with ADD/CHECK/DEL", ver), func() {
+			const IFNAME = "dummy0"
+
+			conf := fmt.Sprintf(`{
+			    "cniVersion": "%s",
+			    "name": "dummyTestv4",
+			    "type": "dummy",
+			    "ipam": {
+					"type": "host-local",
+					"subnet": "10.1.2.0/24",
+					"dataDir": "%s"
+			    }
+			}`, ver, dataDir)
+
+			args := &skel.CmdArgs{
+				ContainerID: "contDummy",
+				Netns:       targetNS.Path(),
+				IfName:      IFNAME,
+				StdinData:   []byte(conf),
+			}
+
+			t := newTesterByVersion(ver)
+
+			var result types.Result
+			var macAddress string
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				var err error
+				result, _, err = testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+
+				macAddress = t.verifyResult(result, IFNAME)
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+			// Make sure dummy link exists in the target namespace
+			err = targetNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				link, err := netlink.LinkByName(IFNAME)
+				Expect(err).NotTo(HaveOccurred())
+				Expect(link.Attrs().Name).To(Equal(IFNAME))
+
+				if macAddress != "" {
+					hwaddr, err := net.ParseMAC(macAddress)
+					Expect(err).NotTo(HaveOccurred())
+					Expect(link.Attrs().HardwareAddr).To(Equal(hwaddr))
+				}
+
+				addrs, err := netlink.AddrList(link, syscall.AF_INET)
+				Expect(err).NotTo(HaveOccurred())
+				Expect(len(addrs)).To(Equal(1))
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			// call CmdCheck
+			n := &Net{}
+			err = json.Unmarshal([]byte(conf), &n)
+			Expect(err).NotTo(HaveOccurred())
+
+			n.IPAM, _, err = allocator.LoadIPAMConfig([]byte(conf), "")
+			Expect(err).NotTo(HaveOccurred())
+
+			newConf, err := buildOneConfig("dummyTestv4", ver, n, result)
+			Expect(err).NotTo(HaveOccurred())
+
+			confString, err := json.Marshal(newConf)
+			Expect(err).NotTo(HaveOccurred())
+
+			args.StdinData = confString
+			// CNI Check dummy in the target namespace
+			err = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+				return testutils.CmdCheckWithArgs(args, func() error { return cmdCheck(args) })
+			})
+			if testutils.SpecVersionHasCHECK(ver) {
+				Expect(err).NotTo(HaveOccurred())
+			} else {
+				Expect(err).To(MatchError("config version does not allow CHECK"))
+			}
+
+			args.StdinData = []byte(conf)
+
+			err = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				err = testutils.CmdDelWithArgs(args, func() error {
+					return cmdDel(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			// Make sure dummy link has been deleted
+			err = targetNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				link, err := netlink.LinkByName(IFNAME)
+				Expect(err).To(HaveOccurred())
+				Expect(link).To(BeNil())
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+
+			// DEL can be called multiple times, make sure no error is returned
+			// if the device is already removed.
+			err = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				err = testutils.CmdDelWithArgs(args, func() error {
+					return cmdDel(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] fails to create dummy link with no ipam", ver), func() {
+			var err error
+
+			const confFmt = `{
+			    "cniVersion": "%s",
+			    "name": "mynet",
+			    "type": "dummy"
+			}`
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummyCont",
+				Netns:       "/var/run/netns/test",
+				IfName:      "dummy0",
+				StdinData:   []byte(fmt.Sprintf(confFmt, ver)),
+			}
+
+			_ = originalNS.Do(func(netNS ns.NetNS) error {
+				defer GinkgoRecover()
+
+				_, _, err = testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).To(Equal(errors.New("dummy interface requires an IPAM configuration")))
+				return nil
+			})
+		})
+	}
+})

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

@@ -19,7 +19,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"path/filepath"
@@ -39,18 +38,19 @@ import (
 	bv "github.com/containernetworking/plugins/pkg/utils/buildversion"
 )
 
-const (
+var (
 	sysBusPCI = "/sys/bus/pci/devices"
 )
 
 // Array of different linux drivers bound to network device needed for DPDK
 var userspaceDrivers = []string{"vfio-pci", "uio_pci_generic", "igb_uio"}
 
-//NetConf for host-device config, look the README to learn how to use those parameters
+// NetConf for host-device config, look the README to learn how to use those parameters
 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
+	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 +67,8 @@ 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 +81,13 @@ 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
 }
 
@@ -94,49 +102,17 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 	defer containerNs.Close()
 
-	if len(cfg.PCIAddr) > 0 {
-		isDpdkMode, err := hasDpdkDriver(cfg.PCIAddr)
+	result := &current.Result{}
+	var contDev netlink.Link
+	if !cfg.DPDKMode {
+		hostDev, err := getLink(cfg.Device, cfg.HWAddr, cfg.KernelPath, cfg.PCIAddr)
 		if err != nil {
-			return fmt.Errorf("error with host device: %v", err)
+			return fmt.Errorf("failed to find 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)
-	if err != nil {
-		return fmt.Errorf("failed to move link %v", err)
-	}
-
-	var result *current.Result
-	// run the IPAM plugin and get back the config to apply
-	if cfg.IPAM.Type != "" {
-		r, err := ipam.ExecAdd(cfg.IPAM.Type, args.StdinData)
+		contDev, err = moveLinkIn(hostDev, containerNs, args.IfName)
 		if err != nil {
-			return err
-		}
-
-		// Invoke ipam del if err to avoid ip leak
-		defer func() {
-			if err != nil {
-				ipam.ExecDel(cfg.IPAM.Type, args.StdinData)
-			}
-		}()
-
-		// Convert whatever the IPAM result was into the current Result type
-		result, err = current.NewResultFromResult(r)
-		if err != nil {
-			return err
-		}
-
-		if len(result.IPs) == 0 {
-			return errors.New("IPAM plugin returned missing IP config")
+			return fmt.Errorf("failed to move link %v", err)
 		}
 
 		result.Interfaces = []*current.Interface{{
@@ -144,13 +120,48 @@ func cmdAdd(args *skel.CmdArgs) error {
 			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)
-		}
+	}
 
+	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
+	r, err := ipam.ExecAdd(cfg.IPAM.Type, args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	// Invoke ipam del if err to avoid ip leak
+	defer func() {
+		if err != nil {
+			ipam.ExecDel(cfg.IPAM.Type, args.StdinData)
+		}
+	}()
+
+	// Convert whatever the IPAM result was into the current Result type
+	newResult, err := current.NewResultFromResult(r)
+	if err != nil {
+		return err
+	}
+
+	if len(newResult.IPs) == 0 {
+		return errors.New("IPAM plugin returned missing IP config")
+	}
+
+	for _, ipc := range newResult.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 +169,11 @@ 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 +190,18 @@ 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 +229,10 @@ 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 +264,21 @@ 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)
@@ -335,16 +344,16 @@ func getLink(devname, hwaddr, kernelpath, pciaddr string) (netlink.Link, error)
 			return nil, fmt.Errorf("kernel device path %q must be absolute and begin with /sys/devices/", kernelpath)
 		}
 		netDir := filepath.Join(kernelpath, "net")
-		files, err := ioutil.ReadDir(netDir)
+		entries, err := os.ReadDir(netDir)
 		if err != nil {
 			return nil, fmt.Errorf("failed to find network devices at %q", netDir)
 		}
 
 		// Grab the first device from eg /sys/devices/pci0000:00/0000:00:19.0/net
-		for _, file := range files {
+		for _, entry := range entries {
 			// Make sure it's really an interface
 			for _, l := range links {
-				if file.Name() == l.Attrs().Name {
+				if entry.Name() == l.Attrs().Name {
 					return l, nil
 				}
 			}
@@ -359,12 +368,12 @@ func getLink(devname, hwaddr, kernelpath, pciaddr string) (netlink.Link, error)
 			}
 			netDir = matches[0]
 		}
-		fInfo, err := ioutil.ReadDir(netDir)
+		entries, err := os.ReadDir(netDir)
 		if err != nil {
 			return nil, fmt.Errorf("failed to read net directory %s: %q", netDir, err)
 		}
-		if len(fInfo) > 0 {
-			return netlink.LinkByName(fInfo[0].Name())
+		if len(entries) > 0 {
+			return netlink.LinkByName(entries[0].Name())
 		}
 		return nil, fmt.Errorf("failed to find device name for pci address %s", pciaddr)
 	}
@@ -410,6 +419,10 @@ 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

@@ -19,12 +19,14 @@ import (
 	"fmt"
 	"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"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	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 +219,7 @@ 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 +255,15 @@ 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 +277,15 @@ 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 +299,15 @@ 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 +380,13 @@ 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 +461,13 @@ 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 +505,13 @@ 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 +542,65 @@ 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 +656,13 @@ 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 +760,13 @@ 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 +815,89 @@ 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 +953,13 @@ 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 +1068,13 @@ 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 +1112,13 @@ 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 +1151,42 @@ 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 := os.MkdirTemp("", "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/ipvlan/ipvlan_test.go

@@ -17,7 +17,6 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"strings"
@@ -25,9 +24,9 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-	"github.com/containernetworking/cni/pkg/types/040"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types020 "github.com/containernetworking/cni/pkg/types/020"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
@@ -272,7 +271,7 @@ var _ = Describe("ipvlan Operations", func() {
 		targetNS, err = testutils.NewNS()
 		Expect(err).NotTo(HaveOccurred())
 
-		dataDir, err = ioutil.TempDir("", "ipvlan_test")
+		dataDir, err = os.MkdirTemp("", "ipvlan_test")
 		Expect(err).NotTo(HaveOccurred())
 
 		err = originalNS.Do(func(ns.NetNS) error {

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/macvlan/macvlan_test.go

@@ -17,7 +17,6 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"strings"
@@ -25,9 +24,9 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-	"github.com/containernetworking/cni/pkg/types/040"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types020 "github.com/containernetworking/cni/pkg/types/020"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
@@ -199,7 +198,7 @@ var _ = Describe("macvlan Operations", func() {
 		targetNS, err = testutils.NewNS()
 		Expect(err).NotTo(HaveOccurred())
 
-		dataDir, err = ioutil.TempDir("", "macvlan_test")
+		dataDir, err = os.MkdirTemp("", "macvlan_test")
 		Expect(err).NotTo(HaveOccurred())
 
 		err = originalNS.Do(func(ns.NetNS) error {

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"
@@ -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/ptp/ptp_test.go

@@ -17,15 +17,14 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strings"
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-	"github.com/containernetworking/cni/pkg/types/040"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types020 "github.com/containernetworking/cni/pkg/types/020"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
@@ -221,7 +220,7 @@ var _ = Describe("ptp Operations", func() {
 		targetNS, err = testutils.NewNS()
 		Expect(err).NotTo(HaveOccurred())
 
-		dataDir, err = ioutil.TempDir("", "ptp_test")
+		dataDir, err = os.MkdirTemp("", "ptp_test")
 		Expect(err).NotTo(HaveOccurred())
 	})
 

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/vlan/vlan_test.go

@@ -17,7 +17,6 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"strings"
@@ -25,9 +24,9 @@ import (
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/020"
-	"github.com/containernetworking/cni/pkg/types/040"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types020 "github.com/containernetworking/cni/pkg/types/020"
+	types040 "github.com/containernetworking/cni/pkg/types/040"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
@@ -178,7 +177,7 @@ var _ = Describe("vlan Operations", func() {
 		targetNS, err = testutils.NewNS()
 		Expect(err).NotTo(HaveOccurred())
 
-		dataDir, err = ioutil.TempDir("", "vlan_test")
+		dataDir, err = os.MkdirTemp("", "vlan_test")
 		Expect(err).NotTo(HaveOccurred())
 
 		err = originalNS.Do(func(ns.NetNS) error {

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

@@ -215,5 +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-v2.conf

@@ -0,0 +1,46 @@
+{
+  "cniVersion": "0.2.0",
+  "name": "OVNKubernetesHybridOverlayNetwork",
+  "type": "win-overlay",
+  "ipam": {
+    "type": "host-local",
+    "subnet": "10.132.0.0/24"
+  },
+  "apiVersion": 2,
+  "capabilities": {
+    "portMappings": true,
+    "dns": true
+  },
+  "policies": [
+    {
+      "name": "EndpointPolicy",
+      "value": {
+        "Type": "OutBoundNAT",
+        "Settings": {
+          "Exceptions": [
+            "172.30.0.0/16"
+          ]
+        }
+      }
+    },
+    {
+      "name": "EndpointPolicy",
+      "value": {
+        "Type": "SDNRoute",
+        "Settings": {
+          "DestinationPrefix": "172.30.0.0/16",
+          "NeedEncap": true
+        }
+      }
+    },
+    {
+      "name": "EndpointPolicy",
+      "value": {
+        "Type": "ProviderAddress",
+        "Settings": {
+          "ProviderAddress": "10.0.133.170"
+        }
+      }
+    }
+  ]
+}

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

@@ -17,11 +17,13 @@ package main
 import (
 	"encoding/json"
 	"fmt"
+	"net"
 	"runtime"
 	"strings"
 
 	"github.com/Microsoft/hcsshim"
 
+	"github.com/Microsoft/hcsshim/hcn"
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
 	current "github.com/containernetworking/cni/pkg/types/100"
@@ -55,16 +57,106 @@ func loadNetConf(bytes []byte) (*NetConf, string, error) {
 	return n, n.CNIVersion, nil
 }
 
-func cmdAdd(args *skel.CmdArgs) error {
-	success := false
-	n, cniVersion, err := loadNetConf(args.StdinData)
-	if err != nil {
-		return errors.Annotate(err, "error while loadNetConf")
+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)
+
+	if n.IPAM.Type != "" {
+		r, err := ipam.ExecAdd(n.IPAM.Type, args.StdinData)
+		if err != nil {
+			return nil, errors.Annotatef(err, "error while executing IPAM addition")
+		}
+
+		// 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 converting the result from IPAM addition")
+		}
+		if len(result.IPs) == 0 {
+			return nil, fmt.Errorf("IPAM plugin return is missing IP config")
+		}
+		epInfo.IpAddress = result.IPs[0].Address.IP.To4()
+		if epInfo.IpAddress == nil {
+			return nil, fmt.Errorf("IPAM plugin return is missing valid IP Address")
+		}
+		epInfo.MacAddress = fmt.Sprintf("%v-%02x-%02x-%02x-%02x", n.EndpointMacPrefix, epInfo.IpAddress[0], epInfo.IpAddress[1], epInfo.IpAddress[2], epInfo.IpAddress[3])
+
 	}
+	epInfo.DNS = n.GetDNS()
+	if n.LoopbackDSR {
+		n.ApplyLoopbackDSRPolicy(&epInfo.IpAddress)
+	}
+	return epInfo, nil
+}
+
+func cmdHcnAdd(args *skel.CmdArgs, n *NetConf) (*current.Result, error) {
+	if len(n.EndpointMacPrefix) != 0 {
+		if len(n.EndpointMacPrefix) != 5 || n.EndpointMacPrefix[2] != '-' {
+			return nil, fmt.Errorf("endpointMacPrefix [%v] is invalid, value must be of the format xx-xx", n.EndpointMacPrefix)
+		}
+	} else {
+		n.EndpointMacPrefix = "0E-2A"
+	}
+
+	networkName := n.Name
+	hnsNetwork, err := hcsshim.GetHNSNetworkByName(networkName)
+	hcnNetwork, err := hcn.GetNetworkByName(networkName)
+	if err != nil {
+		return nil, errors.Annotatef(err, "error while hcn.GetNetworkByName(%s)", networkName)
+	}
+	if hcnNetwork == nil {
+		return  nil, fmt.Errorf("network %v is not found", networkName)
+	}
+	if hnsNetwork == nil {
+		return nil, fmt.Errorf("network %v not found", networkName)
+	}
+
+	if !strings.EqualFold(string (hcnNetwork.Type), "Overlay") {
+		return nil, fmt.Errorf("network %v is of an 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)
+		if err != nil {
+			return nil, errors.Annotate(err, "error while processing endpoint args")
+		}
+		epInfo.NetworkId = hcnNetwork.Id
+		gatewayAddr := net.ParseIP(hnsNetwork.Subnets[0].GatewayAddress)
+		epInfo.Gateway = gatewayAddr.To4()
+		n.ApplyDefaultPAPolicy(hnsNetwork.ManagementIP)
+		if n.IPMasq {
+			n.ApplyOutboundNatPolicy(hnsNetwork.Subnets[0].AddressPrefix)
+		}
+		hcnEndpoint, err := hns.GenerateHcnEndpoint(epInfo, &n.NetConf)
+
+		if err != nil {
+			return nil, errors.Annotate(err, "error while generating HostComputeEndpoint")
+		}
+		return hcnEndpoint, nil
+	})
+	if err != nil {
+		return nil, errors.Annotate(err, "error while adding HostComputeEndpoint")
+	}
+
+	result, err := hns.ConstructHcnResult(hcnNetwork, hcnEndpoint)
+
+	if err != nil {
+		ipam.ExecDel(n.IPAM.Type, args.StdinData)
+		return nil, errors.Annotate(err, "error while constructing HostComputeEndpoint addition result")
+	}
+
+	return result, nil
+
+}
+func cmdHnsAdd(args *skel.CmdArgs, n *NetConf) (*current.Result, error) {
+	success := false
 
 	if len(n.EndpointMacPrefix) != 0 {
 		if len(n.EndpointMacPrefix) != 5 || n.EndpointMacPrefix[2] != '-' {
-			return fmt.Errorf("endpointMacPrefix [%v] is invalid, value must be of the format xx-xx", n.EndpointMacPrefix)
+			return nil, fmt.Errorf("endpointMacPrefix [%v] is invalid, value must be of the format xx-xx", n.EndpointMacPrefix)
 		}
 	} else {
 		n.EndpointMacPrefix = "0E-2A"
@@ -73,15 +165,15 @@ func cmdAdd(args *skel.CmdArgs) error {
 	networkName := n.Name
 	hnsNetwork, err := hcsshim.GetHNSNetworkByName(networkName)
 	if err != nil {
-		return errors.Annotatef(err, "error while GETHNSNewtorkByName(%s)", networkName)
+		return nil, errors.Annotatef(err, "error while GETHNSNewtorkByName(%s)", networkName)
 	}
 
 	if hnsNetwork == nil {
-		return fmt.Errorf("network %v not found", networkName)
+		return nil, fmt.Errorf("network %v not found", networkName)
 	}
 
 	if !strings.EqualFold(hnsNetwork.Type, "Overlay") {
-		return fmt.Errorf("network %v is of an unexpected type: %v", networkName, hnsNetwork.Type)
+		return nil, fmt.Errorf("network %v is of an unexpected type: %v", networkName, hnsNetwork.Type)
 	}
 
 	epName := hns.ConstructEndpointName(args.ContainerID, args.Netns, n.Name)
@@ -140,15 +232,34 @@ func cmdAdd(args *skel.CmdArgs) error {
 		}
 	}()
 	if err != nil {
-		return errors.Annotatef(err, "error while AddHnsEndpoint(%v,%v,%v)", epName, hnsNetwork.Id, args.ContainerID)
+		return nil, errors.Annotatef(err, "error while AddHnsEndpoint(%v,%v,%v)", epName, hnsNetwork.Id, args.ContainerID)
 	}
 
 	result, err := hns.ConstructHnsResult(hnsNetwork, hnsEndpoint)
 	if err != nil {
-		return errors.Annotatef(err, "error while constructResult")
+		return nil, errors.Annotatef(err, "error while constructResult")
 	}
 
 	success = true
+	return result, nil
+}
+func cmdAdd(args *skel.CmdArgs) error {
+	n, cniVersion, err := loadNetConf(args.StdinData)
+	if err != nil {
+		return err
+	}
+
+	var result *current.Result
+	if n.ApiVersion == 2 {
+		result, err = cmdHcnAdd(args, n)
+	} else {
+		result, err = cmdHnsAdd(args, n)
+	}
+	if err != nil {
+		ipam.ExecDel(n.IPAM.Type, args.StdinData)
+		return err
+	}
+
 	return types.PrintResult(result, cniVersion)
 }
 
@@ -158,12 +269,16 @@ func cmdDel(args *skel.CmdArgs) error {
 		return err
 	}
 
-	if err := ipam.ExecDel(n.IPAM.Type, args.StdinData); err != nil {
-		return err
+	if n.IPAM.Type != "" {
+		if err := ipam.ExecDel(n.IPAM.Type, args.StdinData); err != nil {
+			return err
+		}
 	}
-
 	epName := hns.ConstructEndpointName(args.ContainerID, args.Netns, n.Name)
 
+	if n.ApiVersion == 2 {
+		return hns.RemoveHcnEndpoint(epName)
+	}
 	return hns.RemoveHnsEndpoint(epName, args.Netns, args.ContainerID)
 }
 
@@ -173,5 +288,5 @@ 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/bandwidth_linux_test.go

@@ -18,7 +18,6 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"time"
@@ -28,7 +27,7 @@ import (
 	"github.com/containernetworking/cni/pkg/invoke"
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
-	"github.com/containernetworking/cni/pkg/types/100"
+	types100 "github.com/containernetworking/cni/pkg/types/100"
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
 
@@ -896,7 +895,7 @@ var _ = Describe("bandwidth test", func() {
 				packetInBytes = rateInBytes * 25
 
 				var err error
-				dataDir, err = ioutil.TempDir("", "bandwidth_linux_test")
+				dataDir, err = os.MkdirTemp("", "bandwidth_linux_test")
 				Expect(err).NotTo(HaveOccurred())
 
 				ptpConf = fmt.Sprintf(`{

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/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/main.go

@@ -54,6 +54,7 @@ type PortMapConf struct {
 	SNAT                 *bool     `json:"snat,omitempty"`
 	ConditionsV4         *[]string `json:"conditionsV4"`
 	ConditionsV6         *[]string `json:"conditionsV6"`
+	MasqAll              bool      `json:"masqAll,omitempty"`
 	MarkMasqBit          *int      `json:"markMasqBit"`
 	ExternalSetMarkChain *string   `json:"externalSetMarkChain"`
 	RuntimeConfig        struct {

plugins/meta/portmap/portmap.go

@@ -120,33 +120,22 @@ func checkPorts(config *PortMapConf, containerNet net.IPNet) error {
 	dnatChain := genDnatChain(config.Name, config.ContainerID)
 	fillDnatRules(&dnatChain, config, containerNet)
 
-	ip4t := maybeGetIptables(false)
-	ip6t := maybeGetIptables(true)
+	ip4t, err4 := maybeGetIptables(false)
+	ip6t, err6 := maybeGetIptables(true)
 	if ip4t == nil && ip6t == nil {
-		return fmt.Errorf("neither iptables nor ip6tables usable")
+		err := fmt.Errorf("neither iptables nor ip6tables is usable")
+		err = fmt.Errorf("%v, (iptables) %v", err, err4)
+		err = fmt.Errorf("%v, (ip6tables) %v", err, err6)
+		return err
 	}
 
 	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)
 		}
@@ -259,13 +248,22 @@ func fillDnatRules(c *chain, config *PortMapConf, containerNet net.IPNet) {
 			hpRule := make([]string, len(ruleBase), len(ruleBase)+4)
 			copy(hpRule, ruleBase)
 
+			masqCIDR := containerNet.String()
+			if config.MasqAll {
+				if isV6 {
+					masqCIDR = "::/0"
+				} else {
+					masqCIDR = "0.0.0.0/0"
+				}
+			}
+
 			hpRule = append(hpRule,
-				"-s", containerNet.String(),
+				"-s", masqCIDR,
 				"-j", setMarkChainName,
 			)
 			c.rules = append(c.rules, hpRule)
 
-			if !isV6 {
+			if !isV6 && !config.MasqAll {
 				// localhost
 				localRule := make([]string, len(ruleBase), len(ruleBase)+4)
 				copy(localRule, ruleBase)
@@ -368,10 +366,13 @@ func unforwardPorts(config *PortMapConf) error {
 	// Might be lying around from old versions
 	oldSnatChain := genOldSnatChain(config.Name, config.ContainerID)
 
-	ip4t := maybeGetIptables(false)
-	ip6t := maybeGetIptables(true)
+	ip4t, err4 := maybeGetIptables(false)
+	ip6t, err6 := maybeGetIptables(true)
 	if ip4t == nil && ip6t == nil {
-		return fmt.Errorf("neither iptables nor ip6tables usable")
+		err := fmt.Errorf("neither iptables nor ip6tables is usable")
+		err = fmt.Errorf("%v, (iptables) %v", err, err4)
+		err = fmt.Errorf("%v, (ip6tables) %v", err, err6)
+		return err
 	}
 
 	if ip4t != nil {
@@ -392,7 +393,7 @@ func unforwardPorts(config *PortMapConf) error {
 
 // maybeGetIptables implements the soft error swallowing. If iptables is
 // usable for the given protocol, returns a handle, otherwise nil
-func maybeGetIptables(isV6 bool) *iptables.IPTables {
+func maybeGetIptables(isV6 bool) (*iptables.IPTables, error) {
 	proto := iptables.ProtocolIPv4
 	if isV6 {
 		proto = iptables.ProtocolIPv6
@@ -400,15 +401,15 @@ func maybeGetIptables(isV6 bool) *iptables.IPTables {
 
 	ipt, err := iptables.NewWithProtocol(proto)
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
 	_, err = ipt.List("nat", "OUTPUT")
 	if err != nil {
-		return nil
+		return nil, err
 	}
 
-	return ipt
+	return ipt, nil
 }
 
 // deletePortmapStaleConnections delete the UDP conntrack entries on the specified IP family

plugins/meta/portmap/portmap_integ_test.go

@@ -207,7 +207,7 @@ var _ = Describe("portmap integration tests", func() {
 
 				// Verify iptables rules are gone
 				_, err = ipt.List("nat", dnatChainName)
-				Expect(err).To(MatchError(ContainSubstring("iptables: No chain/target/match by that name.")))
+				Expect(err).To(HaveOccurred())
 
 				// Check that everything succeeded *after* we clean up the network
 				if !contOK {

plugins/meta/tuning/tuning.go

@@ -19,15 +19,15 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"path"
 	"path/filepath"
+	"regexp"
 	"strings"
 
-	"github.com/j-keck/arping"
 	"github.com/vishvananda/netlink"
 	"golang.org/x/sys/unix"
 
@@ -41,6 +41,8 @@ import (
 )
 
 const defaultDataDir = "/run/cni/tuning"
+const defaultAllowlistDir = "/etc/cni/tuning/"
+const defaultAllowlistFile = "allowlist.conf"
 
 // TuningConf represents the network tuning configuration.
 type TuningConf struct {
@@ -232,7 +234,7 @@ func createBackup(ifName, containerID, backupPath string, tuningConf *TuningConf
 	if err != nil {
 		return fmt.Errorf("failed to marshall data for %q: %v", ifName, err)
 	}
-	if err = ioutil.WriteFile(path.Join(backupPath, containerID+"_"+ifName+".json"), data, 0600); err != nil {
+	if err = os.WriteFile(path.Join(backupPath, containerID+"_"+ifName+".json"), data, 0600); err != nil {
 		return fmt.Errorf("failed to save file %s.json: %v", ifName, err)
 	}
 
@@ -247,7 +249,7 @@ func restoreBackup(ifName, containerID, backupPath string) error {
 		return nil
 	}
 
-	file, err := ioutil.ReadFile(filePath)
+	file, err := os.ReadFile(filePath)
 	if err != nil {
 		return fmt.Errorf("failed to open file %q: %v", filePath, err)
 	}
@@ -301,11 +303,22 @@ func restoreBackup(ifName, containerID, backupPath string) error {
 }
 
 func cmdAdd(args *skel.CmdArgs) error {
+	if err := validateSysctlConflictingKeys(args.StdinData); err != nil {
+		return err
+	}
 	tuningConf, err := parseConf(args.StdinData, args.Args)
 	if err != nil {
 		return err
 	}
 
+	if err = validateSysctlConf(tuningConf); err != nil {
+		return err
+	}
+
+	if err = validateArgs(args); err != nil {
+		return err
+	}
+
 	// Parse previous result.
 	if tuningConf.RawPrevResult == nil {
 		return fmt.Errorf("Required prevResult missing")
@@ -315,18 +328,19 @@ 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 {
-			fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
-			fileName = filepath.Clean(fileName)
+			key = strings.Replace(key, ".", string(os.PathSeparator), -1)
+
+			// 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", key)
 
 			// Refuse to modify sysctl parameters that don't belong
 			// to the network subsystem.
@@ -334,7 +348,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 				return fmt.Errorf("invalid net sysctl key: %q", key)
 			}
 			content := []byte(value)
-			err := ioutil.WriteFile(fileName, content, 0644)
+			err := os.WriteFile(fileName, content, 0644)
 			if err != nil {
 				return err
 			}
@@ -351,12 +365,6 @@ 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)
 		}
 
@@ -405,6 +413,9 @@ func main() {
 }
 
 func cmdCheck(args *skel.CmdArgs) error {
+	if err := validateSysctlConflictingKeys(args.StdinData); err != nil {
+		return err
+	}
 	tuningConf, err := parseConf(args.StdinData, args.Args)
 	if err != nil {
 		return err
@@ -428,9 +439,8 @@ 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)
+			contents, err := os.ReadFile(fileName)
 			if err != nil {
 				return err
 			}
@@ -486,3 +496,89 @@ func cmdCheck(args *skel.CmdArgs) error {
 
 	return nil
 }
+
+// Validate the sysctls in the tuning config are on the sysctl allowlist file.
+// Note that if the allowlist file is missing no validation takes place.
+func validateSysctlConf(tuningConf *TuningConf) error {
+	isPresent, allowlist, err := readAllowlist()
+	if err != nil {
+		return err
+	}
+	if !isPresent {
+		return nil
+	}
+	for sysctl, _ := range tuningConf.SysCtl {
+		match, err := contains(sysctl, allowlist)
+		if err != nil {
+			return err
+		}
+		if !match {
+			return errors.New(fmt.Sprintf("Sysctl %s is not allowed. Only the following sysctls are allowed: %+v", sysctl, allowlist))
+		}
+	}
+	return nil
+}
+
+// Validate the allowList contains the given sysctl
+func contains(sysctl string, allowList []string) (bool, error) {
+	for _, allowListElement := range allowList {
+		match, err := regexp.MatchString(allowListElement, sysctl)
+		if err != nil {
+			return false, err
+		}
+		if match {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+// Read the systctl allowlist from file. Return info if the file is present and the read allowList if it is
+func readAllowlist() (bool, []string, error) {
+	if _, err := os.Stat(filepath.Join(defaultAllowlistDir, defaultAllowlistFile)); os.IsNotExist(err) {
+		return false, nil, nil
+	}
+	dat, err := os.ReadFile(filepath.Join(defaultAllowlistDir, defaultAllowlistFile))
+	if err != nil {
+		return false, nil, err
+	}
+
+	lines := strings.Split(string(dat), "\n")
+	allowList := []string{}
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if len(line) > 0 {
+			allowList = append(allowList, line)
+		}
+	}
+	return true, allowList, nil
+}
+
+type sysctlKey string
+
+type sysctlCheck struct {
+	SysCtl map[sysctlKey]string `json:"sysctl"`
+}
+
+var sysctlDuplicatesMap = map[sysctlKey]interface{}{}
+
+func (d *sysctlKey) UnmarshalText(data []byte) error {
+	key := sysctlKey(string(data))
+	if _, exists := sysctlDuplicatesMap[key]; exists {
+		return errors.New("duplicated sysctl keys are not allowed")
+	}
+	sysctlDuplicatesMap[key] = ""
+	return nil
+}
+
+func validateSysctlConflictingKeys(data []byte) error {
+	sysctlCheck := sysctlCheck{}
+	return json.Unmarshal(data, &sysctlCheck)
+}
+
+func validateArgs(args *skel.CmdArgs) error {
+	if strings.Contains(args.IfName, string(os.PathSeparator)) {
+		return errors.New(fmt.Sprintf("Interface name (%s) contains an invalid character %s", args.IfName, string(os.PathSeparator)))
+	}
+	return nil
+}

plugins/meta/tuning/tuning_test.go

@@ -18,6 +18,8 @@ import (
 	"encoding/json"
 	"fmt"
 	"net"
+	"os"
+	"path/filepath"
 
 	"github.com/containernetworking/cni/pkg/skel"
 	"github.com/containernetworking/cni/pkg/types"
@@ -75,6 +77,24 @@ func buildOneConfig(name, cniVersion string, orig *TuningConf, prevResult types.
 
 }
 
+func createSysctlAllowFile(sysctls []string) error {
+	err := os.MkdirAll(defaultAllowlistDir, 0755)
+	if err != nil {
+		return err
+	}
+	f, err := os.Create(filepath.Join(defaultAllowlistDir, defaultAllowlistFile))
+	if err != nil {
+		return err
+	}
+	for _, sysctl := range sysctls {
+		_, err = f.WriteString(fmt.Sprintf("%s\n", sysctl))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 var _ = Describe("tuning plugin", func() {
 	var originalNS, targetNS ns.NetNS
 	const IFNAME string = "dummy0"
@@ -110,6 +130,7 @@ var _ = Describe("tuning plugin", func() {
 			return nil
 		})
 		Expect(err).NotTo(HaveOccurred())
+		sysctlDuplicatesMap = map[sysctlKey]interface{}{}
 	})
 
 	AfterEach(func() {
@@ -117,6 +138,7 @@ var _ = Describe("tuning plugin", func() {
 		Expect(testutils.UnmountNS(originalNS)).To(Succeed())
 		Expect(targetNS.Close()).To(Succeed())
 		Expect(testutils.UnmountNS(targetNS)).To(Succeed())
+		os.RemoveAll(defaultAllowlistDir)
 	})
 
 	for _, ver := range []string{"0.3.0", "0.3.1", "0.4.0", "1.0.0"} {
@@ -989,5 +1011,211 @@ var _ = Describe("tuning plugin", func() {
 			})
 			Expect(err).NotTo(HaveOccurred())
 		})
+
+		It(fmt.Sprintf("[%s] passes prevResult through unchanged", ver), func() {
+			conf := []byte(fmt.Sprintf(`{
+				"name": "test",
+				"type": "tuning",
+				"cniVersion": "%s",
+				"sysctl": {
+					"net.ipv4.conf.all.log_martians": "1"
+				},
+				"prevResult": {
+					"interfaces": [
+						{"name": "dummy0", "sandbox":"netns"}
+					],
+					"ips": [
+						{
+							"version": "4",
+							"address": "10.0.0.2/24",
+							"gateway": "10.0.0.1",
+							"interface": 0
+						}
+					]
+				}
+			}`, ver))
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       targetNS.Path(),
+				IfName:      IFNAME,
+				StdinData:   conf,
+			}
+
+			beforeConf = configToRestore{}
+
+			err := createSysctlAllowFile([]string{"^net\\.ipv4\\.conf\\.other\\.[a-z_]*$"})
+			Expect(err).NotTo(HaveOccurred())
+
+			err = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				_, _, err := testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).To(HaveOccurred())
+
+				err = testutils.CmdDel(originalNS.Path(),
+					args.ContainerID, "", func() error { return cmdDel(args) })
+				Expect(err).NotTo(HaveOccurred())
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] passes prevResult through unchanged", ver), func() {
+			conf := []byte(fmt.Sprintf(`{
+				"name": "test",
+				"type": "tuning",
+				"cniVersion": "%s",
+				"sysctl": {
+					"net.ipv4.conf.all.log_martians": "1"
+				},
+				"prevResult": {
+					"interfaces": [
+						{"name": "dummy0", "sandbox":"netns"}
+					],
+					"ips": [
+						{
+							"version": "4",
+							"address": "10.0.0.2/24",
+							"gateway": "10.0.0.1",
+							"interface": 0
+						}
+					]
+				}
+			}`, ver))
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       targetNS.Path(),
+				IfName:      IFNAME,
+				StdinData:   conf,
+			}
+
+			err := createSysctlAllowFile([]string{"^net\\.ipv4\\.conf\\.all\\.[a-z_]*$"})
+			Expect(err).NotTo(HaveOccurred())
+
+			beforeConf = configToRestore{}
+
+			err = originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				r, _, err := testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).NotTo(HaveOccurred())
+
+				result, err := types100.GetResult(r)
+				Expect(err).NotTo(HaveOccurred())
+
+				Expect(len(result.Interfaces)).To(Equal(1))
+				Expect(result.Interfaces[0].Name).To(Equal(IFNAME))
+				Expect(len(result.IPs)).To(Equal(1))
+				Expect(result.IPs[0].Address.String()).To(Equal("10.0.0.2/24"))
+
+				err = testutils.CmdDel(originalNS.Path(),
+					args.ContainerID, "", func() error { return cmdDel(args) })
+				Expect(err).NotTo(HaveOccurred())
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] does not allow duplicated sysctl values", ver), func() {
+			conf := []byte(fmt.Sprintf(`{
+				"name": "test",
+				"type": "tuning",
+				"cniVersion": "%s",
+				"sysctl": {
+					"net.ipv4.conf.all.log_martians": "1",
+					"net.ipv4.conf.all.log_martians": "0"
+				},
+				"prevResult": {
+					"interfaces": [
+						{"name": "dummy0", "sandbox":"netns"}
+					],
+					"ips": [
+						{
+							"version": "4",
+							"address": "10.0.0.2/24",
+							"gateway": "10.0.0.1",
+							"interface": 0
+						}
+					]
+				}
+			}`, ver))
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       targetNS.Path(),
+				IfName:      IFNAME,
+				StdinData:   conf,
+			}
+
+			beforeConf = configToRestore{}
+
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				_, _, err := testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).To(HaveOccurred())
+				Expect(err.Error()).To(ContainSubstring("duplicated"))
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
+		It(fmt.Sprintf("[%s] does not allow ifname with path separator", ver), func() {
+			conf := []byte(fmt.Sprintf(`{
+				"name": "test",
+				"type": "tuning",
+				"cniVersion": "%s",
+				"sysctl": {
+					"net.ipv4.conf.all.log_martians": "1"
+				},
+				"prevResult": {
+					"interfaces": [
+						{"name": "eth/0", "sandbox":"netns"}
+					],
+					"ips": [
+						{
+							"version": "4",
+							"address": "10.0.0.2/24",
+							"gateway": "10.0.0.1",
+							"interface": 0
+						}
+					]
+				}
+			}`, ver))
+
+			args := &skel.CmdArgs{
+				ContainerID: "dummy",
+				Netns:       targetNS.Path(),
+				IfName:      "eth/0",
+				StdinData:   conf,
+			}
+
+			beforeConf = configToRestore{}
+
+			err := originalNS.Do(func(ns.NetNS) error {
+				defer GinkgoRecover()
+
+				_, _, err := testutils.CmdAddWithArgs(args, func() error {
+					return cmdAdd(args)
+				})
+				Expect(err).To(HaveOccurred())
+				Expect(err.Error()).To(ContainSubstring("invalid character"))
+
+				return nil
+			})
+			Expect(err).NotTo(HaveOccurred())
+		})
+
 	}
 })

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)
 	}

scripts/release.sh

@@ -16,12 +16,12 @@ rm -Rf ${SRC_DIR}/${RELEASE_DIR}
 mkdir -p ${SRC_DIR}/${RELEASE_DIR}
 mkdir -p ${OUTPUT_DIR}
 
-$DOCKER run -ti -v ${SRC_DIR}:/go/src/github.com/containernetworking/plugins:z --rm golang:1.16-alpine \
+$DOCKER run -ti -v ${SRC_DIR}:/go/src/github.com/containernetworking/plugins:z --rm golang:1.18-alpine \
 /bin/sh -xe -c "\
     apk --no-cache add bash tar;
     cd /go/src/github.com/containernetworking/plugins; umask 0022;
 
-    for arch in amd64 arm arm64 ppc64le s390x mips64le; do \
+    for arch in amd64 arm arm64 ppc64le s390x mips64le riscv64; do \
         rm -f ${OUTPUT_DIR}/*; \
         CGO_ENABLED=0 GOARCH=\$arch ./build_linux.sh ${BUILDFLAGS}; \
         for format in tgz; do \

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/.gitignore

@@ -1,3 +1,38 @@
+# Binaries for programs and plugins
 *.exe
-.idea
-.vscode
+*.dll
+*.so
+*.dylib
+
+# Ignore vscode setting files
+.vscode/
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/
+
+# Ignore gcs bin directory
+service/bin/
+service/pkg/
+
+*.img
+*.vhd
+*.tar.gz
+
+# Make stuff
+.rootfs-done
+bin/*
+rootfs/*
+*.o
+/build/
+
+deps/*
+out/*
+
+.idea/
+.vscode/

vendor/github.com/Microsoft/hcsshim/.golangci.yml

@@ -0,0 +1,99 @@
+run:
+  timeout: 8m
+
+linters:
+  enable:
+    - stylecheck
+
+linters-settings:
+  stylecheck:
+    # https://staticcheck.io/docs/checks
+    checks: ["all"]
+
+
+issues:
+  # This repo has a LOT of generated schema files, operating system bindings, and other things that ST1003 from stylecheck won't like
+  # (screaming case Windows api constants for example). There's also some structs that we *could* change the initialisms to be Go
+  # friendly (Id -> ID) but they're exported and it would be a breaking change. This makes it so that most new code, code that isn't
+  # supposed to be a pretty faithful mapping to an OS call/constants, or non-generated code still checks if we're following idioms,
+  # while ignoring the things that are just noise or would be more of a hassle than it'd be worth to change.
+  exclude-rules:
+    - path: layer.go
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: hcsshim.go
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\hcs\\schema2\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\wclayer\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: hcn\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\hcs\\schema1\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\hns\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: ext4\\internal\\compactext4\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: ext4\\internal\\format\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\guestrequest\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\guest\\prot\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\windevice\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\winapi\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\vmcompute\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\regstate\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"
+
+    - path: internal\\hcserror\\
+      linters:
+        - stylecheck
+      Text: "ST1003:"

vendor/github.com/Microsoft/hcsshim/Makefile

@@ -0,0 +1,87 @@
+BASE:=base.tar.gz
+
+GO:=go
+GO_FLAGS:=-ldflags "-s -w" # strip Go binaries
+CGO_ENABLED:=0
+GOMODVENDOR:=
+
+CFLAGS:=-O2 -Wall
+LDFLAGS:=-static -s # strip C binaries
+
+GO_FLAGS_EXTRA:=
+ifeq "$(GOMODVENDOR)" "1"
+GO_FLAGS_EXTRA += -mod=vendor
+endif
+GO_BUILD:=CGO_ENABLED=$(CGO_ENABLED) $(GO) build $(GO_FLAGS) $(GO_FLAGS_EXTRA)
+
+SRCROOT=$(dir $(abspath $(firstword $(MAKEFILE_LIST))))
+
+# The link aliases for gcstools
+GCS_TOOLS=\
+	generichook
+
+.PHONY: all always rootfs test
+
+all: out/initrd.img out/rootfs.tar.gz
+
+clean:
+	find -name '*.o' -print0 | xargs -0 -r rm
+	rm -rf bin deps rootfs out
+
+test:
+	cd $(SRCROOT) && go test -v ./internal/guest/...
+
+out/delta.tar.gz: bin/init bin/vsockexec bin/cmd/gcs bin/cmd/gcstools Makefile
+	@mkdir -p out
+	rm -rf rootfs
+	mkdir -p rootfs/bin/
+	cp bin/init rootfs/
+	cp bin/vsockexec rootfs/bin/
+	cp bin/cmd/gcs rootfs/bin/
+	cp bin/cmd/gcstools rootfs/bin/
+	for tool in $(GCS_TOOLS); do ln -s gcstools rootfs/bin/$$tool; done
+	git -C $(SRCROOT) rev-parse HEAD > rootfs/gcs.commit && \
+	git -C $(SRCROOT) rev-parse --abbrev-ref HEAD > rootfs/gcs.branch
+	tar -zcf $@ -C rootfs .
+	rm -rf rootfs
+
+out/rootfs.tar.gz: out/initrd.img
+	rm -rf rootfs-conv
+	mkdir rootfs-conv
+	gunzip -c out/initrd.img | (cd rootfs-conv && cpio -imd)
+	tar -zcf $@ -C rootfs-conv .
+	rm -rf rootfs-conv
+
+out/initrd.img: $(BASE) out/delta.tar.gz $(SRCROOT)/hack/catcpio.sh
+	$(SRCROOT)/hack/catcpio.sh "$(BASE)" out/delta.tar.gz > out/initrd.img.uncompressed
+	gzip -c out/initrd.img.uncompressed > $@
+	rm out/initrd.img.uncompressed
+
+-include deps/cmd/gcs.gomake
+-include deps/cmd/gcstools.gomake
+
+# Implicit rule for includes that define Go targets.
+%.gomake: $(SRCROOT)/Makefile
+	@mkdir -p $(dir $@)
+	@/bin/echo $(@:deps/%.gomake=bin/%): $(SRCROOT)/hack/gomakedeps.sh > $@.new
+	@/bin/echo -e '\t@mkdir -p $$(dir $$@) $(dir $@)' >> $@.new
+	@/bin/echo -e '\t$$(GO_BUILD) -o $$@.new $$(SRCROOT)/$$(@:bin/%=%)' >> $@.new
+	@/bin/echo -e '\tGO="$(GO)" $$(SRCROOT)/hack/gomakedeps.sh $$@ $$(SRCROOT)/$$(@:bin/%=%) $$(GO_FLAGS) $$(GO_FLAGS_EXTRA) > $(@:%.gomake=%.godeps).new' >> $@.new
+	@/bin/echo -e '\tmv $(@:%.gomake=%.godeps).new $(@:%.gomake=%.godeps)' >> $@.new
+	@/bin/echo -e '\tmv $$@.new $$@' >> $@.new
+	@/bin/echo -e '-include $(@:%.gomake=%.godeps)' >> $@.new
+	mv $@.new $@
+
+VPATH=$(SRCROOT)
+
+bin/vsockexec: vsockexec/vsockexec.o vsockexec/vsock.o
+	@mkdir -p bin
+	$(CC) $(LDFLAGS) -o $@ $^
+
+bin/init: init/init.o vsockexec/vsock.o
+	@mkdir -p bin
+	$(CC) $(LDFLAGS) -o $@ $^
+
+%.o: %.c
+	@mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<

vendor/github.com/Microsoft/hcsshim/README.md

@@ -2,13 +2,67 @@
 
 [![Build status](https://github.com/microsoft/hcsshim/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/microsoft/hcsshim/actions?query=branch%3Amaster)
 
-This package contains the Golang interface for using the Windows [Host Compute Service](https://techcommunity.microsoft.com/t5/containers/introducing-the-host-compute-service-hcs/ba-p/382332) (HCS) to launch and manage [Windows Containers](https://docs.microsoft.com/en-us/virtualization/windowscontainers/about/). It also contains other helpers and functions for managing Windows Containers such as the Golang interface for the Host Network Service (HNS).
+This package contains the Golang interface for using the Windows [Host Compute Service](https://techcommunity.microsoft.com/t5/containers/introducing-the-host-compute-service-hcs/ba-p/382332) (HCS) to launch and manage [Windows Containers](https://docs.microsoft.com/en-us/virtualization/windowscontainers/about/). It also contains other helpers and functions for managing Windows Containers such as the Golang interface for the Host Network Service (HNS), as well as code for the [guest agent](./internal/guest/README.md) (commonly referred to as the GCS or Guest Compute Service in the codebase) used to support running Linux Hyper-V containers.
 
-It is primarily used in the [Moby Project](https://github.com/moby/moby), but it can be freely used by other projects as well.
+It is primarily used in the [Moby](https://github.com/moby/moby) and [Containerd](https://github.com/containerd/containerd) projects, but it can be freely used by other projects as well.
+
+## Building
+
+While this repository can be used as a library of sorts to call the HCS apis, there are a couple binaries built out of the repository as well. The main ones being the Linux guest agent, and an implementation of the [runtime v2 containerd shim api](https://github.com/containerd/containerd/blob/master/runtime/v2/README.md).
+### Linux Hyper-V Container Guest Agent
+
+To build the Linux guest agent itself all that's needed is to set your GOOS to "Linux" and build out of ./cmd/gcs.
+```powershell
+C:\> $env:GOOS="linux"
+C:\> go build .\cmd\gcs\
+```
+
+or on a Linux machine
+```sh
+> go build ./cmd/gcs
+```
+
+If you want it to be packaged inside of a rootfs to boot with alongside all of the other tools then you'll need to provide a rootfs that it can be packaged inside of. An easy way is to export the rootfs of a container.
+
+```sh
+docker pull busybox
+docker run --name base_image_container busybox
+docker export base_image_container | gzip > base.tar.gz
+BASE=./base.tar.gz
+make all
+```
+
+If the build is successful, in the `./out` folder you should see:
+```sh
+> ls ./out/
+delta.tar.gz  initrd.img  rootfs.tar.gz
+```
+
+### Containerd Shim
+For info on the Runtime V2 API: https://github.com/containerd/containerd/blob/master/runtime/v2/README.md.
+
+Contrary to the typical Linux architecture of shim -> runc, the runhcs shim is used both to launch and manage the lifetime of containers.
+
+```powershell
+C:\> $env:GOOS="windows"
+C:\> go build .\cmd\containerd-shim-runhcs-v1
+```
+
+Then place the binary in the same directory that Containerd is located at in your environment. A default Containerd configuration file can be generated by running:
+```powershell
+.\containerd.exe config default | Out-File "C:\Program Files\containerd\config.toml" -Encoding ascii
+```
+
+This config file will already have the shim set as the default runtime for cri interactions.
+
+To trial using the shim out with ctr.exe:
+```powershell
+C:\> ctr.exe run --runtime io.containerd.runhcs.v1 --rm mcr.microsoft.com/windows/nanoserver:2004 windows-test cmd /c "echo Hello World!"
+```
 
 ## Contributing
 
-This project welcomes contributions and suggestions.  Most contributions require you to agree to a
+This project welcomes contributions and suggestions. Most contributions require you to agree to a
 Contributor License Agreement (CLA) declaring that you have the right to, and actually do, grant us
 the rights to use your contribution. For details, visit https://cla.microsoft.com.
 
@@ -16,7 +70,27 @@ When you submit a pull request, a CLA-bot will automatically determine whether y
 a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions
 provided by the bot. You will only need to do this once across all repos using our CLA.
 
-We also ask that contributors [sign their commits](https://git-scm.com/docs/git-commit) using `git commit -s` or `git commit --signoff` to certify they either authored the work themselves or otherwise have permission to use it in this project. 
+We also require that contributors [sign their commits](https://git-scm.com/docs/git-commit) using `git commit -s` or `git commit --signoff` to
+certify they either authored the work themselves or otherwise have permission to use it in this project. Please see https://developercertificate.org/ for
+more info, as well as to make sure that you can attest to the rules listed. Our CI uses the [DCO Github app](https://github.com/apps/dco) to ensure
+that all commits in a given PR are signed-off.
+
+### Test Directory (Important to note)
+
+This project has tried to trim some dependencies from the root Go modules file that would be cumbersome to get transitively included if this
+project is being vendored/used as a library. Some of these dependencies were only being used for tests, so the /test directory in this project also has
+its own go.mod file where these are now included to get around this issue. Our tests rely on the code in this project to run, so the test Go modules file
+has a relative path replace directive to pull in the latest hcsshim code that the tests actually touch from this project
+(which is the repo itself on your disk).
+
+```
+replace (
+	github.com/Microsoft/hcsshim => ../
+)
+```
+
+Because of this, for most code changes you may need to run `go mod vendor` + `go mod tidy` in the /test directory in this repository, as the
+CI in this project will check if the files are out of date and will fail if this is true.
 
 
 ## Code of Conduct

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

@@ -1,27 +0,0 @@
-module github.com/Microsoft/hcsshim
-
-go 1.13
-
-require (
-	github.com/Microsoft/go-winio v0.4.17
-	github.com/containerd/cgroups v1.0.1
-	github.com/containerd/console v1.0.2
-	github.com/containerd/containerd v1.5.1
-	github.com/containerd/go-runc v1.0.0
-	github.com/containerd/ttrpc v1.0.2
-	github.com/containerd/typeurl v1.0.2
-	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
-)
-
-replace (
-	google.golang.org/genproto => google.golang.org/genproto v0.0.0-20200224152610-e50cd9704f63
-	google.golang.org/grpc => google.golang.org/grpc v1.27.1
-)

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

@@ -1,885 +0,0 @@
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vendor/github.com/Microsoft/hcsshim/hcn/hcn.go

@@ -122,12 +122,15 @@ func defaultQuery() HostComputeQuery {
 
 // PlatformDoesNotSupportError happens when users are attempting to use a newer shim on an older OS
 func platformDoesNotSupportError(featureName string) error {
-	return fmt.Errorf("Platform does not support feature %s", featureName)
+	return fmt.Errorf("platform does not support feature %s", featureName)
 }
 
 // V2ApiSupported returns an error if the HCN version does not support the V2 Apis.
 func V2ApiSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.Api.V2 {
 		return nil
 	}
@@ -143,7 +146,10 @@ func V2SchemaVersion() SchemaVersion {
 
 // RemoteSubnetSupported returns an error if the HCN version does not support Remote Subnet policies.
 func RemoteSubnetSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.RemoteSubnet {
 		return nil
 	}
@@ -152,7 +158,10 @@ func RemoteSubnetSupported() error {
 
 // HostRouteSupported returns an error if the HCN version does not support Host Route policies.
 func HostRouteSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.HostRoute {
 		return nil
 	}
@@ -161,7 +170,10 @@ func HostRouteSupported() error {
 
 // DSRSupported returns an error if the HCN version does not support Direct Server Return.
 func DSRSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.DSR {
 		return nil
 	}
@@ -170,7 +182,10 @@ func DSRSupported() error {
 
 // Slash32EndpointPrefixesSupported returns an error if the HCN version does not support configuring endpoints with /32 prefixes.
 func Slash32EndpointPrefixesSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.Slash32EndpointPrefixes {
 		return nil
 	}
@@ -179,7 +194,10 @@ func Slash32EndpointPrefixesSupported() error {
 
 // AclSupportForProtocol252Supported returns an error if the HCN version does not support HNS ACL Policies to support protocol 252 for VXLAN.
 func AclSupportForProtocol252Supported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.AclSupportForProtocol252 {
 		return nil
 	}
@@ -188,7 +206,10 @@ func AclSupportForProtocol252Supported() error {
 
 // SessionAffinitySupported returns an error if the HCN version does not support Session Affinity.
 func SessionAffinitySupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.SessionAffinity {
 		return nil
 	}
@@ -197,7 +218,10 @@ func SessionAffinitySupported() error {
 
 // IPv6DualStackSupported returns an error if the HCN version does not support IPv6DualStack.
 func IPv6DualStackSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.IPv6DualStack {
 		return nil
 	}
@@ -206,7 +230,10 @@ func IPv6DualStackSupported() error {
 
 //L4proxySupported returns an error if the HCN verison does not support L4Proxy
 func L4proxyPolicySupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.L4Proxy {
 		return nil
 	}
@@ -215,7 +242,10 @@ func L4proxyPolicySupported() error {
 
 // L4WfpProxySupported returns an error if the HCN verison does not support L4WfpProxy
 func L4WfpProxyPolicySupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.L4WfpProxy {
 		return nil
 	}
@@ -224,7 +254,10 @@ func L4WfpProxyPolicySupported() error {
 
 // SetPolicySupported returns an error if the HCN version does not support SetPolicy.
 func SetPolicySupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.SetPolicy {
 		return nil
 	}
@@ -233,7 +266,10 @@ func SetPolicySupported() error {
 
 // VxlanPortSupported returns an error if the HCN version does not support configuring the VXLAN TCP port.
 func VxlanPortSupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.VxlanPort {
 		return nil
 	}
@@ -242,13 +278,40 @@ func VxlanPortSupported() error {
 
 // TierAclPolicySupported returns an error if the HCN version does not support configuring the TierAcl.
 func TierAclPolicySupported() error {
-	supported := GetSupportedFeatures()
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
 	if supported.TierAcl {
 		return nil
 	}
 	return platformDoesNotSupportError("TierAcl")
 }
 
+// NetworkACLPolicySupported returns an error if the HCN version does not support NetworkACLPolicy
+func NetworkACLPolicySupported() error {
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
+	if supported.NetworkACL {
+		return nil
+	}
+	return platformDoesNotSupportError("NetworkACL")
+}
+
+// NestedIpSetSupported returns an error if the HCN version does not support NestedIpSet
+func NestedIpSetSupported() error {
+	supported, err := GetCachedSupportedFeatures()
+	if err != nil {
+		return err
+	}
+	if supported.NestedIpSet {
+		return nil
+	}
+	return platformDoesNotSupportError("NestedIpSet")
+}
+
 // 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/hcnglobals.go

@@ -76,6 +76,12 @@ var (
 
 	//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}}}
+
+	//HNS 15.0 allows for NetworkACL Policy support
+	NetworkACLPolicyVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 15, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
+
+	//HNS 15.0 allows for NestedIpSet support
+	NestedIpSetVersion = VersionRanges{VersionRange{MinVersion: Version{Major: 15, Minor: 0}, MaxVersion: Version{Major: math.MaxInt32, Minor: math.MaxInt32}}}
 )
 
 // GetGlobals returns the global properties of the HCN Service.
@@ -105,7 +111,7 @@ func hnsCall(method, path, request string, returnResponse interface{}) error {
 
 	err := _hnsCall(method, path, request, &responseBuffer)
 	if err != nil {
-		return hcserror.New(err, "hnsCall ", "")
+		return hcserror.New(err, "hnsCall", "")
 	}
 	response := interop.ConvertAndFreeCoTaskMemString(responseBuffer)
 

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

@@ -50,6 +50,7 @@ const (
 	SetPolicy           NetworkPolicyType = "SetPolicy"
 	NetworkL4Proxy      NetworkPolicyType = "L4Proxy"
 	LayerConstraint     NetworkPolicyType = "LayerConstraint"
+	NetworkACL          NetworkPolicyType = "NetworkACL"
 )
 
 // NetworkPolicy is a collection of Policy settings for a Network.
@@ -132,7 +133,7 @@ type AclPolicySetting struct {
 	RemotePorts     string        `json:",omitempty"`
 	RuleType        RuleType      `json:",omitempty"`
 	Priority        uint16        `json:",omitempty"`
-}
+} 
 
 // QosPolicySetting sets Quality of Service bandwidth caps on an Endpoint.
 type QosPolicySetting struct {
@@ -154,6 +155,19 @@ type SDNRoutePolicySetting struct {
 	NeedEncap         bool   `json:",omitempty"`
 }
 
+// NetworkACLPolicySetting creates ACL rules on a network
+type NetworkACLPolicySetting struct {
+	Protocols       string        `json:",omitempty"` // EX: 6 (TCP), 17 (UDP), 1 (ICMPv4), 58 (ICMPv6), 2 (IGMP)
+	Action          ActionType    `json:","`
+	Direction       DirectionType `json:","`
+	LocalAddresses  string        `json:",omitempty"`
+	RemoteAddresses string        `json:",omitempty"`
+	LocalPorts      string        `json:",omitempty"`
+	RemotePorts     string        `json:",omitempty"`
+	RuleType        RuleType      `json:",omitempty"`
+	Priority        uint16        `json:",omitempty"`
+} 
+
 // FiveTuple is nested in L4ProxyPolicySetting  for WFP support.
 type FiveTuple struct {
 	Protocols       string `json:",omitempty"`
@@ -271,6 +285,7 @@ type SetPolicyType string
 
 const (
 	SetPolicyTypeIpSet SetPolicyType = "IPSET"
+	SetPolicyTypeNestedIpSet SetPolicyType = "NESTEDIPSET"
 )
 
 // SetPolicySetting creates IPSets on network
@@ -305,7 +320,7 @@ type L4ProxyPolicySetting struct {
 	Protocol    ProtocolType `json:",omitempty"`
 	Exceptions  []string     `json:",omitempty"`
 	Destination string
-	OutboundNAT bool `json:",omitempty"`
+	OutboundNAT bool         `json:",omitempty"`
 }
 
 // TierAclRule represents an ACL within TierAclPolicySetting

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

@@ -137,7 +137,7 @@ func AddRoute(endpoints []HostComputeEndpoint, destinationPrefix string, nextHop
 	logrus.Debugf("hcn::HostComputeRoute::AddRoute endpointId=%v, destinationPrefix=%v, nextHop=%v, needEncapsulation=%v", endpoints, destinationPrefix, nextHop, needEncapsulation)
 
 	if len(endpoints) <= 0 {
-		return nil, errors.New("Missing endpoints")
+		return nil, errors.New("missing endpoints")
 	}
 
 	route := &HostComputeRoute{

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

@@ -1,9 +1,21 @@
 package hcn
 
 import (
+	"fmt"
+	"sync"
+
+	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
 
+var (
+	// featuresOnce handles assigning the supported features and printing the supported info to stdout only once to avoid unnecessary work
+	// multiple times.
+	featuresOnce      sync.Once
+	featuresErr       error
+	supportedFeatures SupportedFeatures
+)
+
 // SupportedFeatures are the features provided by the Service.
 type SupportedFeatures struct {
 	Acl                      AclFeatures `json:"ACL"`
@@ -20,6 +32,8 @@ type SupportedFeatures struct {
 	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"`
+	NetworkACL               bool        `json:"NetworkACL"`
+	NestedIpSet              bool        `json:"NestedIpSet"`
 }
 
 // AclFeatures are the supported ACL possibilities.
@@ -36,17 +50,41 @@ type ApiSupport struct {
 	V2 bool `json:"V2"`
 }
 
-// GetSupportedFeatures returns the features supported by the Service.
-func GetSupportedFeatures() SupportedFeatures {
-	var features SupportedFeatures
+// GetCachedSupportedFeatures returns the features supported by the Service and an error if the query failed. If this has been called
+// before it will return the supported features and error received from the first call. This can be used to optimize if many calls to the
+// various hcn.IsXSupported methods need to be made.
+func GetCachedSupportedFeatures() (SupportedFeatures, error) {
+	// Only query the HCN version and features supported once, instead of everytime this is invoked. The logs are useful to
+	// debug incidents where there's confusion on if a feature is supported on the host machine. The sync.Once helps to avoid redundant
+	// spam of these anytime a check needs to be made for if an HCN feature is supported. This is a common occurrence in kube-proxy
+	// for example.
+	featuresOnce.Do(func() {
+		supportedFeatures, featuresErr = getSupportedFeatures()
+	})
 
-	globals, err := GetGlobals()
+	return supportedFeatures, featuresErr
+}
+
+// GetSupportedFeatures returns the features supported by the Service.
+//
+// Deprecated: Use GetCachedSupportedFeatures instead.
+func GetSupportedFeatures() SupportedFeatures {
+	features, err := GetCachedSupportedFeatures()
 	if err != nil {
 		// Expected on pre-1803 builds, all features will be false/unsupported
-		logrus.Debugf("Unable to obtain globals: %s", err)
+		logrus.WithError(err).Errorf("unable to obtain supported features")
 		return features
 	}
+	return features
+}
 
+func getSupportedFeatures() (SupportedFeatures, error) {
+	var features SupportedFeatures
+	globals, err := GetGlobals()
+	if err != nil {
+		// It's expected if this fails once, it should always fail. It should fail on pre 1803 builds for example.
+		return SupportedFeatures{}, errors.Wrap(err, "failed to query HCN version number: this is expected on pre 1803 builds.")
+	}
 	features.Acl = AclFeatures{
 		AclAddressLists:       isFeatureSupported(globals.Version, HNSVersion1803),
 		AclNoHostRulePriority: isFeatureSupported(globals.Version, HNSVersion1803),
@@ -71,8 +109,15 @@ func GetSupportedFeatures() SupportedFeatures {
 	features.L4Proxy = isFeatureSupported(globals.Version, L4ProxyPolicyVersion)
 	features.L4WfpProxy = isFeatureSupported(globals.Version, L4WfpProxyPolicyVersion)
 	features.TierAcl = isFeatureSupported(globals.Version, TierAclPolicyVersion)
+	features.NetworkACL = isFeatureSupported(globals.Version, NetworkACLPolicyVersion)
+	features.NestedIpSet = isFeatureSupported(globals.Version, NestedIpSetVersion)
 
-	return features
+	logrus.WithFields(logrus.Fields{
+		"version":           fmt.Sprintf("%+v", globals.Version),
+		"supportedFeatures": fmt.Sprintf("%+v", features),
+	}).Info("HCN feature check")
+
+	return features, nil
 }
 
 func isFeatureSupported(currentVersion Version, versionsSupported VersionRanges) bool {
@@ -87,19 +132,15 @@ func isFeatureSupported(currentVersion Version, versionsSupported VersionRanges)
 
 func isFeatureInRange(currentVersion Version, versionRange VersionRange) bool {
 	if currentVersion.Major < versionRange.MinVersion.Major {
-		logrus.Infof("currentVersion.Major < versionRange.MinVersion.Major: %v, %v", currentVersion.Major, versionRange.MinVersion.Major)
 		return false
 	}
 	if currentVersion.Major > versionRange.MaxVersion.Major {
-		logrus.Infof("currentVersion.Major > versionRange.MaxVersion.Major: %v, %v", currentVersion.Major, versionRange.MaxVersion.Major)
 		return false
 	}
 	if currentVersion.Major == versionRange.MinVersion.Major && currentVersion.Minor < versionRange.MinVersion.Minor {
-		logrus.Infof("currentVersion.Minor < versionRange.MinVersion.Major: %v, %v", currentVersion.Minor, versionRange.MinVersion.Minor)
 		return false
 	}
 	if currentVersion.Major == versionRange.MaxVersion.Major && currentVersion.Minor > versionRange.MaxVersion.Minor {
-		logrus.Infof("currentVersion.Minor > versionRange.MaxVersion.Major: %v, %v", currentVersion.Minor, versionRange.MaxVersion.Minor)
 		return false
 	}
 	return true

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

@@ -7,6 +7,9 @@ import (
 // HNSEndpoint represents a network endpoint in HNS
 type HNSEndpoint = hns.HNSEndpoint
 
+// HNSEndpointStats represent the stats for an networkendpoint in HNS
+type HNSEndpointStats = hns.EndpointStats
+
 // Namespace represents a Compartment.
 type Namespace = hns.Namespace
 
@@ -108,3 +111,8 @@ func GetHNSEndpointByID(endpointID string) (*HNSEndpoint, error) {
 func GetHNSEndpointByName(endpointName string) (*HNSEndpoint, error) {
 	return hns.GetHNSEndpointByName(endpointName)
 }
+
+// GetHNSEndpointStats gets the endpoint stats by ID
+func GetHNSEndpointStats(endpointName string) (*HNSEndpointStats, error) {
+	return hns.GetHNSEndpointStats(endpointName)
+}

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

@@ -86,6 +86,12 @@ type Container interface {
 	// container to be terminated by some error condition (including calling
 	// Close).
 	Wait() error
+	// WaitChannel returns the wait channel of the container
+	WaitChannel() <-chan struct{}
+	// WaitError returns the container termination error.
+	// This function should only be called after the channel in WaitChannel()
+	// is closed. Otherwise it is not thread safe.
+	WaitError() error
 	// Modify sends a request to modify container resources
 	Modify(ctx context.Context, config interface{}) error
 }

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

@@ -78,6 +78,13 @@ var (
 
 	// ErrNotSupported is an error encountered when hcs doesn't support the request
 	ErrPlatformNotSupported = errors.New("unsupported platform request")
+
+	// ErrProcessAlreadyStopped is returned by hcs if the process we're trying to kill has already been stopped.
+	ErrProcessAlreadyStopped = syscall.Errno(0x8037011f)
+
+	// ErrInvalidHandle is an error that can be encountrered when querying the properties of a compute system when the handle to that
+	// compute system has already been closed.
+	ErrInvalidHandle = syscall.Errno(0x6)
 )
 
 type ErrorEvent struct {
@@ -147,7 +154,7 @@ func (e *HcsError) Error() string {
 
 func (e *HcsError) Temporary() bool {
 	err, ok := e.Err.(net.Error)
-	return ok && err.Temporary()
+	return ok && err.Temporary() //nolint:staticcheck
 }
 
 func (e *HcsError) Timeout() bool {
@@ -186,7 +193,7 @@ func (e *SystemError) Error() string {
 
 func (e *SystemError) Temporary() bool {
 	err, ok := e.Err.(net.Error)
-	return ok && err.Temporary()
+	return ok && err.Temporary() //nolint:staticcheck
 }
 
 func (e *SystemError) Timeout() bool {
@@ -217,7 +224,7 @@ func (e *ProcessError) Error() string {
 
 func (e *ProcessError) Temporary() bool {
 	err, ok := e.Err.(net.Error)
-	return ok && err.Temporary()
+	return ok && err.Temporary() //nolint:staticcheck
 }
 
 func (e *ProcessError) Timeout() bool {
@@ -249,6 +256,14 @@ func IsNotExist(err error) bool {
 		err == ErrElementNotFound
 }
 
+// IsErrorInvalidHandle checks whether the error is the result of an operation carried
+// out on a handle that is invalid/closed. This error popped up while trying to query
+// stats on a container in the process of being stopped.
+func IsErrorInvalidHandle(err error) bool {
+	err = getInnerError(err)
+	return err == ErrInvalidHandle
+}
+
 // IsAlreadyClosed checks if an error is caused by the Container or Process having been
 // already closed by a call to the Close() method.
 func IsAlreadyClosed(err error) bool {
@@ -281,6 +296,7 @@ func IsTimeout(err error) bool {
 func IsAlreadyStopped(err error) bool {
 	err = getInnerError(err)
 	return err == ErrVmcomputeAlreadyStopped ||
+		err == ErrProcessAlreadyStopped ||
 		err == ErrElementNotFound
 }
 

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

@@ -3,7 +3,9 @@ package hcs
 import (
 	"context"
 	"encoding/json"
+	"errors"
 	"io"
+	"os"
 	"sync"
 	"syscall"
 	"time"
@@ -16,16 +18,17 @@ import (
 
 // ContainerError is an error encountered in HCS
 type Process struct {
-	handleLock     sync.RWMutex
-	handle         vmcompute.HcsProcess
-	processID      int
-	system         *System
-	hasCachedStdio bool
-	stdioLock      sync.Mutex
-	stdin          io.WriteCloser
-	stdout         io.ReadCloser
-	stderr         io.ReadCloser
-	callbackNumber uintptr
+	handleLock          sync.RWMutex
+	handle              vmcompute.HcsProcess
+	processID           int
+	system              *System
+	hasCachedStdio      bool
+	stdioLock           sync.Mutex
+	stdin               io.WriteCloser
+	stdout              io.ReadCloser
+	stderr              io.ReadCloser
+	callbackNumber      uintptr
+	killSignalDelivered bool
 
 	closedWaitOnce sync.Once
 	waitBlock      chan struct{}
@@ -149,12 +152,45 @@ func (process *Process) Kill(ctx context.Context) (bool, error) {
 		return false, makeProcessError(process, operation, ErrAlreadyClosed, nil)
 	}
 
+	if process.killSignalDelivered {
+		// A kill signal has already been sent to this process. Sending a second
+		// one offers no real benefit, as processes cannot stop themselves from
+		// being terminated, once a TerminateProcess has been issued. Sending a
+		// second kill may result in a number of errors (two of which detailed bellow)
+		// and which we can avoid handling.
+		return true, nil
+	}
+
 	resultJSON, err := vmcompute.HcsTerminateProcess(ctx, process.handle)
+	if err != nil {
+		// We still need to check these two cases, as processes may still be killed by an
+		// external actor (human operator, OOM, random script etc).
+		if errors.Is(err, os.ErrPermission) || IsAlreadyStopped(err) {
+			// There are two cases where it should be safe to ignore an error returned
+			// by HcsTerminateProcess. The first one is cause by the fact that
+			// HcsTerminateProcess ends up calling TerminateProcess in the context
+			// of a container. According to the TerminateProcess documentation:
+			// https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-terminateprocess#remarks
+			// After a process has terminated, call to TerminateProcess with open
+			// handles to the process fails with ERROR_ACCESS_DENIED (5) error code.
+			// It's safe to ignore this error here. HCS should always have permissions
+			// to kill processes inside any container. So an ERROR_ACCESS_DENIED
+			// is unlikely to be anything else than what the ending remarks in the
+			// documentation states.
+			//
+			// The second case is generated by hcs itself, if for any reason HcsTerminateProcess
+			// is called twice in a very short amount of time. In such cases, hcs may return
+			// HCS_E_PROCESS_ALREADY_STOPPED.
+			return true, nil
+		}
+	}
 	events := processHcsResult(ctx, resultJSON)
 	delivered, err := process.processSignalResult(ctx, err)
 	if err != nil {
 		err = makeProcessError(process, operation, err, events)
 	}
+
+	process.killSignalDelivered = delivered
 	return delivered, err
 }
 

vendor/github.com/Microsoft/hcsshim/internal/hcs/schema2/attachment.go

@@ -27,4 +27,10 @@ type Attachment struct {
 	CaptureIoAttributionContext bool `json:"CaptureIoAttributionContext,omitempty"`
 
 	ReadOnly bool `json:"ReadOnly,omitempty"`
+
+	SupportCompressedVolumes bool `json:"SupportCompressedVolumes,omitempty"`
+
+	AlwaysAllowSparseFiles bool `json:"AlwaysAllowSparseFiles,omitempty"`
+
+	ExtensibleVirtualDiskType string `json:"ExtensibleVirtualDiskType,omitempty"`
 }

vendor/github.com/Microsoft/hcsshim/internal/hcs/schema2/container.go

@@ -31,4 +31,6 @@ type Container struct {
 	RegistryChanges *RegistryChanges `json:"RegistryChanges,omitempty"`
 
 	AssignedDevices []Device `json:"AssignedDevices,omitempty"`
+
+	AdditionalDeviceNamespace *ContainerDefinitionDevice `json:"AdditionalDeviceNamespace,omitempty"`
 }

vendor/github.com/Microsoft/hcsshim/internal/hcs/schema2/cpu_group_config.go

@@ -14,5 +14,5 @@ type CpuGroupConfig struct {
 	Affinity        *CpuGroupAffinity  `json:"Affinity,omitempty"`
 	GroupProperties []CpuGroupProperty `json:"GroupProperties,omitempty"`
 	// Hypervisor CPU group IDs exposed to clients
-	HypervisorGroupId int32 `json:"HypervisorGroupId,omitempty"`
+	HypervisorGroupId uint64 `json:"HypervisorGroupId,omitempty"`
 }

vendor/github.com/Microsoft/hcsshim/internal/hcs/schema2/device.go

@@ -12,9 +12,9 @@ package hcsschema
 type DeviceType string
 
 const (
-	ClassGUID      DeviceType = "ClassGuid"
-	DeviceInstance DeviceType = "DeviceInstance"
-	GPUMirror      DeviceType = "GpuMirror"
+	ClassGUID        DeviceType = "ClassGuid"
+	DeviceInstanceID DeviceType = "DeviceInstance"
+	GPUMirror        DeviceType = "GpuMirror"
 )
 
 type Device struct {
@@ -22,6 +22,6 @@ type Device struct {
 	Type DeviceType `json:"Type,omitempty"`
 	//  The interface class guid of the device interfaces to assign to the  container.  Only used when Type is ClassGuid.
 	InterfaceClassGuid string `json:"InterfaceClassGuid,omitempty"`
-	//  The location path of the device to assign to the container.  Only used when Type is DeviceInstance.
+	//  The location path of the device to assign to the container.  Only used when Type is DeviceInstanceID.
 	LocationPath string `json:"LocationPath,omitempty"`
 }