Merge pull request #433 from ydcool/mips64le-support

add support for mips64le

.travis.yml

@@ -18,6 +18,7 @@ env:
   - TARGET=arm64
   - TARGET=ppc64le
   - TARGET=s390x
+  - TARGET=mips64le
 
 matrix:
   fast_finish: true

OWNERS.md

@@ -1,8 +1,10 @@
 # Owners
 This is the official list of the CNI network plugins owners:
+- Bruce Ma <brucema19901024@gmail.com> (@mars1024)
 - Bryan Boreham <bryan@weave.works> (@bboreham)
 - Casey Callendrello <casey.callendrello@coreos.com> (@squeed)
 - Dan Williams <dcbw@redhat.com> (@dcbw)
 - Gabe Rosenhouse <grosenhouse@pivotal.io> (@rosenhouse)
 - Matt Dupre <matt@tigera.io> (@matthewdupre)
+- Piotr Skarmuk <piotr.skarmuk@gmail.com> (@jellonek)
 - Stefan Junker <stefan.junker@coreos.com> (@steveeJ)

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/alexflint/go-filemutex v0.0.0-20171022225611-72bdc8eae2ae
 	github.com/buger/jsonparser v0.0.0-20180808090653-f4dd9f5a6b44
 	github.com/containernetworking/cni v0.7.1
-	github.com/coreos/go-iptables v0.4.2
+	github.com/coreos/go-iptables v0.4.5
 	github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7
 	github.com/d2g/dhcp4 v0.0.0-20170904100407-a1d1b6c41b1c
 	github.com/d2g/dhcp4client v1.0.0

go.sum

@@ -10,6 +10,10 @@ github.com/containernetworking/cni v0.7.1 h1:fE3r16wpSEyaqY4Z4oFrLMmIGfBYIKpPrHK
 github.com/containernetworking/cni v0.7.1/go.mod h1:LGwApLUm2FpoOfxTDEeq8T9ipbpZ61X79hmU3w8FmsY=
 github.com/coreos/go-iptables v0.4.2 h1:KH0EwId05JwWIfb96gWvkiT2cbuOu8ygqUaB+yPAwIg=
 github.com/coreos/go-iptables v0.4.2/go.mod h1:/mVI274lEDI2ns62jHCDnCyBF9Iwsmekav8Dbxlm1MU=
+github.com/coreos/go-iptables v0.4.4 h1:5oOUvU7Fk53Hn/rkdJ0zcYGCffotqXpyi4ADCkO1TJ8=
+github.com/coreos/go-iptables v0.4.4/go.mod h1:/mVI274lEDI2ns62jHCDnCyBF9Iwsmekav8Dbxlm1MU=
+github.com/coreos/go-iptables v0.4.5 h1:DpHb9vJrZQEFMcVLFKAAGMUVX0XoRC0ptCthinRYm38=
+github.com/coreos/go-iptables v0.4.5/go.mod h1:/mVI274lEDI2ns62jHCDnCyBF9Iwsmekav8Dbxlm1MU=
 github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7 h1:u9SHYsPQNyt5tgDm3YN7+9dYrpK96E5wFilTFWIDZOM=
 github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/d2g/dhcp4 v0.0.0-20170904100407-a1d1b6c41b1c h1:Xo2rK1pzOm0jO6abTPIQwbAmqBIOj132otexc1mmzFc=

pkg/utils/iptables.go

@@ -0,0 +1,121 @@
+// Copyright 2017 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 utils
+
+import (
+	"errors"
+	"fmt"
+
+	"github.com/coreos/go-iptables/iptables"
+)
+
+const statusChainExists = 1
+
+// EnsureChain idempotently creates the iptables chain. It does not
+// return an error if the chain already exists.
+func EnsureChain(ipt *iptables.IPTables, table, chain string) error {
+	if ipt == nil {
+		return errors.New("failed to ensure iptable chain: IPTables was nil")
+	}
+	exists, err := ChainExists(ipt, table, chain)
+	if err != nil {
+		return fmt.Errorf("failed to list iptables chains: %v", err)
+	}
+	if !exists {
+		err = ipt.NewChain(table, chain)
+		if err != nil {
+			eerr, eok := err.(*iptables.Error)
+			if eok && eerr.ExitStatus() != statusChainExists {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// ChainExists checks whether an iptables chain exists.
+func ChainExists(ipt *iptables.IPTables, table, chain string) (bool, error) {
+	if ipt == nil {
+		return false, errors.New("failed to check iptable chain: IPTables was nil")
+	}
+	chains, err := ipt.ListChains(table)
+	if err != nil {
+		return false, err
+	}
+
+	for _, ch := range chains {
+		if ch == chain {
+			return true, nil
+		}
+	}
+	return false, nil
+}
+
+// DeleteRule idempotently delete the iptables rule in the specified table/chain.
+// It does not return an error if the referring chain doesn't exist
+func DeleteRule(ipt *iptables.IPTables, table, chain string, rulespec ...string) error {
+	if ipt == nil {
+		return errors.New("failed to ensure iptable chain: IPTables was nil")
+	}
+	if err := ipt.Delete(table, chain, rulespec...); err != nil {
+		eerr, eok := err.(*iptables.Error)
+		switch {
+		case eok && eerr.IsNotExist():
+			// swallow here, the chain was already deleted
+			return nil
+		case eok && eerr.ExitStatus() == 2:
+			// swallow here, invalid command line parameter because the referring rule is missing
+			return nil
+		default:
+			return fmt.Errorf("Failed to delete referring rule %s %s: %v", table, chain, err)
+		}
+	}
+	return nil
+}
+
+// DeleteChain idempotently deletes the specified table/chain.
+// It does not return an errors if the chain does not exist
+func DeleteChain(ipt *iptables.IPTables, table, chain string) error {
+	if ipt == nil {
+		return errors.New("failed to ensure iptable chain: IPTables was nil")
+	}
+
+	err := ipt.DeleteChain(table, chain)
+	eerr, eok := err.(*iptables.Error)
+	switch {
+	case eok && eerr.IsNotExist():
+		// swallow here, the chain was already deleted
+		return nil
+	default:
+		return err
+	}
+}
+
+// ClearChain idempotently clear the iptables rules in the specified table/chain.
+// If the chain does not exist, a new one will be created
+func ClearChain(ipt *iptables.IPTables, table, chain string) error {
+	if ipt == nil {
+		return errors.New("failed to ensure iptable chain: IPTables was nil")
+	}
+	err := ipt.ClearChain(table, chain)
+	eerr, eok := err.(*iptables.Error)
+	switch {
+	case eok && eerr.IsNotExist():
+		// swallow here, the chain was already deleted
+		return EnsureChain(ipt, table, chain)
+	default:
+		return err
+	}
+}

pkg/utils/iptables_test.go

@@ -0,0 +1,97 @@
+// Copyright 2017-2018 CNI authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"fmt"
+	"math/rand"
+	"runtime"
+
+	"github.com/containernetworking/plugins/pkg/ns"
+	"github.com/containernetworking/plugins/pkg/testutils"
+	"github.com/coreos/go-iptables/iptables"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+const TABLE = "filter" // We'll monkey around here
+
+var _ = Describe("chain tests", func() {
+	var testChain string
+	var ipt *iptables.IPTables
+	var cleanup func()
+
+	BeforeEach(func() {
+
+		// Save a reference to the original namespace,
+		// Add a new NS
+		currNs, err := ns.GetCurrentNS()
+		Expect(err).NotTo(HaveOccurred())
+
+		testNs, err := testutils.NewNS()
+		Expect(err).NotTo(HaveOccurred())
+
+		testChain = fmt.Sprintf("cni-test-%d", rand.Intn(10000000))
+
+		ipt, err = iptables.NewWithProtocol(iptables.ProtocolIPv4)
+		Expect(err).NotTo(HaveOccurred())
+
+		runtime.LockOSThread()
+		err = testNs.Set()
+		Expect(err).NotTo(HaveOccurred())
+
+		cleanup = func() {
+			if ipt == nil {
+				return
+			}
+			ipt.ClearChain(TABLE, testChain)
+			ipt.DeleteChain(TABLE, testChain)
+			currNs.Set()
+		}
+
+	})
+
+	AfterEach(func() {
+		cleanup()
+	})
+
+	Describe("EnsureChain", func() {
+		It("creates chains idempotently", func() {
+			err := EnsureChain(ipt, TABLE, testChain)
+			Expect(err).NotTo(HaveOccurred())
+
+			// Create it again!
+			err = EnsureChain(ipt, TABLE, testChain)
+			Expect(err).NotTo(HaveOccurred())
+		})
+	})
+
+	Describe("DeleteChain", func() {
+		It("delete chains idempotently", func() {
+			// Create chain
+			err := EnsureChain(ipt, TABLE, testChain)
+			Expect(err).NotTo(HaveOccurred())
+
+			// Delete chain
+			err = DeleteChain(ipt, TABLE, testChain)
+			Expect(err).NotTo(HaveOccurred())
+
+			// Delete it again!
+			err = DeleteChain(ipt, TABLE, testChain)
+			Expect(err).NotTo(HaveOccurred())
+		})
+	})
+
+})

plugins/main/bridge/README.md

@@ -14,17 +14,18 @@ If the bridge is missing, the plugin will create one on first use and, if gatewa
 ## Example configuration
 ```
 {
-	"name": "mynet",
-	"type": "bridge",
-	"bridge": "mynet0",
-	"isDefaultGateway": true,
-	"forceAddress": false,
-	"ipMasq": true,
-	"hairpinMode": true,
-	"ipam": {
-		"type": "host-local",
-		"subnet": "10.10.0.0/16"
-	}
+    "cniVersion": "0.3.1",
+    "name": "mynet",
+    "type": "bridge",
+    "bridge": "mynet0",
+    "isDefaultGateway": true,
+    "forceAddress": false,
+    "ipMasq": true,
+    "hairpinMode": true,
+    "ipam": {
+        "type": "host-local",
+        "subnet": "10.10.0.0/16"
+    }
 }
 ```
 
@@ -32,10 +33,10 @@ If the bridge is missing, the plugin will create one on first use and, if gatewa
 ```
 {
     "cniVersion": "0.3.1",
-	"name": "mynet",
-	"type": "bridge",
-	"bridge": "mynet0",
-	"ipam": {}
+    "name": "mynet",
+    "type": "bridge",
+    "bridge": "mynet0",
+    "ipam": {}
 }
 ```
 

plugins/meta/firewall/firewall_iptables_test.go

@@ -270,6 +270,13 @@ var _ = Describe("firewall plugin iptables backend", func() {
 			Expect(err).NotTo(HaveOccurred())
 
 			validateFullRuleset(fullConf)
+
+			// ensure creation is idempotent
+			_, _, err = testutils.CmdAdd(targetNS.Path(), args.ContainerID, IFNAME, fullConf, func() error {
+				return cmdAdd(args)
+			})
+			Expect(err).NotTo(HaveOccurred())
+
 			return nil
 		})
 		Expect(err).NotTo(HaveOccurred())

plugins/meta/firewall/iptables.go

@@ -22,6 +22,7 @@ import (
 	"net"
 
 	"github.com/containernetworking/cni/pkg/types/current"
+	"github.com/containernetworking/plugins/pkg/utils"
 	"github.com/coreos/go-iptables/iptables"
 )
 
@@ -32,20 +33,6 @@ func getPrivChainRules(ip string) [][]string {
 	return rules
 }
 
-func ensureChain(ipt *iptables.IPTables, table, chain string) error {
-	chains, err := ipt.ListChains(table)
-	if err != nil {
-		return fmt.Errorf("failed to list iptables chains: %v", err)
-	}
-	for _, ch := range chains {
-		if ch == chain {
-			return nil
-		}
-	}
-
-	return ipt.NewChain(table, chain)
-}
-
 func generateFilterRule(privChainName string) []string {
 	return []string{"-m", "comment", "--comment", "CNI firewall plugin rules", "-j", privChainName}
 }
@@ -73,10 +60,10 @@ func (ib *iptablesBackend) setupChains(ipt *iptables.IPTables) error {
 	adminRule := generateFilterRule(ib.adminChainName)
 
 	// Ensure our private chains exist
-	if err := ensureChain(ipt, "filter", ib.privChainName); err != nil {
+	if err := utils.EnsureChain(ipt, "filter", ib.privChainName); err != nil {
 		return err
 	}
-	if err := ensureChain(ipt, "filter", ib.adminChainName); err != nil {
+	if err := utils.EnsureChain(ipt, "filter", ib.adminChainName); err != nil {
 		return err
 	}
 
@@ -160,10 +147,10 @@ func (ib *iptablesBackend) checkRules(conf *FirewallNetConf, result *current.Res
 	}
 
 	// Ensure our private chains exist
-	if err := ensureChain(ipt, "filter", ib.privChainName); err != nil {
+	if err := utils.EnsureChain(ipt, "filter", ib.privChainName); err != nil {
 		return err
 	}
-	if err := ensureChain(ipt, "filter", ib.adminChainName); err != nil {
+	if err := utils.EnsureChain(ipt, "filter", ib.adminChainName); err != nil {
 		return err
 	}
 

plugins/meta/portmap/chain.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/containernetworking/plugins/pkg/utils"
 	"github.com/coreos/go-iptables/iptables"
 	"github.com/mattn/go-shellwords"
 )
@@ -35,16 +36,11 @@ type chain struct {
 
 // setup idempotently creates the chain. It will not error if the chain exists.
 func (c *chain) setup(ipt *iptables.IPTables) error {
-	// create the chain
-	exists, err := chainExists(ipt, c.table, c.name)
+
+	err := utils.EnsureChain(ipt, c.table, c.name)
 	if err != nil {
 		return err
 	}
-	if !exists {
-		if err := ipt.NewChain(c.table, c.name); err != nil {
-			return err
-		}
-	}
 
 	// Add the rules to the chain
 	for _, rule := range c.rules {
@@ -74,7 +70,7 @@ func (c *chain) teardown(ipt *iptables.IPTables) error {
 	// flush the chain
 	// This will succeed *and create the chain* if it does not exist.
 	// If the chain doesn't exist, the next checks will fail.
-	if err := ipt.ClearChain(c.table, c.name); err != nil {
+	if err := utils.ClearChain(ipt, c.table, c.name); err != nil {
 		return err
 	}
 
@@ -94,17 +90,15 @@ func (c *chain) teardown(ipt *iptables.IPTables) error {
 				}
 				chainParts = chainParts[2:] // List results always include an -A CHAINNAME
 
-				if err := ipt.Delete(c.table, entryChain, chainParts...); err != nil {
-					return fmt.Errorf("Failed to delete referring rule %s %s: %v", c.table, entryChainRule, err)
+				if err := utils.DeleteRule(ipt, c.table, entryChain, chainParts...); err != nil {
+					return err
 				}
+
 			}
 		}
 	}
 
-	if err := ipt.DeleteChain(c.table, c.name); err != nil {
-		return err
-	}
-	return nil
+	return utils.DeleteChain(ipt, c.table, c.name)
 }
 
 // insertUnique will add a rule to a chain if it does not already exist.
@@ -125,24 +119,10 @@ func insertUnique(ipt *iptables.IPTables, table, chain string, prepend bool, rul
 	}
 }
 
-func chainExists(ipt *iptables.IPTables, tableName, chainName string) (bool, error) {
-	chains, err := ipt.ListChains(tableName)
-	if err != nil {
-		return false, err
-	}
-
-	for _, ch := range chains {
-		if ch == chainName {
-			return true, nil
-		}
-	}
-	return false, nil
-}
-
 // check the chain.
 func (c *chain) check(ipt *iptables.IPTables) error {
 
-	exists, err := chainExists(ipt, c.table, c.name)
+	exists, err := utils.ChainExists(ipt, c.table, c.name)
 	if err != nil {
 		return err
 	}

plugins/meta/portmap/chain_test.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 	"math/rand"
 	"runtime"
+	"sync"
 
 	"github.com/containernetworking/plugins/pkg/ns"
 	"github.com/containernetworking/plugins/pkg/testutils"
@@ -32,6 +33,7 @@ const TABLE = "filter" // We'll monkey around here
 var _ = Describe("chain tests", func() {
 	var testChain chain
 	var ipt *iptables.IPTables
+	var testNs ns.NetNS
 	var cleanup func()
 
 	BeforeEach(func() {
@@ -41,7 +43,7 @@ var _ = Describe("chain tests", func() {
 		currNs, err := ns.GetCurrentNS()
 		Expect(err).NotTo(HaveOccurred())
 
-		testNs, err := testutils.NewNS()
+		testNs, err = testutils.NewNS()
 		Expect(err).NotTo(HaveOccurred())
 
 		tlChainName := fmt.Sprintf("cni-test-%d", rand.Intn(10000000))
@@ -195,4 +197,38 @@ var _ = Describe("chain tests", func() {
 			}
 		}
 	})
+
+	It("deletes chains idempotently in parallel", func() {
+		defer cleanup()
+		// number of parallel executions
+		N := 10
+		var wg sync.WaitGroup
+		err := testChain.setup(ipt)
+		Expect(err).NotTo(HaveOccurred())
+		errCh := make(chan error, N)
+		for i := 0; i < N; i++ {
+			wg.Add(1)
+			go func() {
+				defer wg.Done()
+				// teardown chain
+				errCh <- testNs.Do(func(ns.NetNS) error {
+					return testChain.teardown(ipt)
+				})
+			}()
+		}
+		wg.Wait()
+		close(errCh)
+		for err := range errCh {
+			Expect(err).NotTo(HaveOccurred())
+		}
+
+		chains, err := ipt.ListChains(TABLE)
+		Expect(err).NotTo(HaveOccurred())
+		for _, chain := range chains {
+			if chain == testChain.name {
+				Fail("Chain was not deleted")
+			}
+		}
+
+	})
 })

plugins/meta/portmap/portmap.go

@@ -124,7 +124,7 @@ func checkPorts(config *PortMapConf, containerIP net.IP) error {
 	}
 
 	if ip4t != nil {
-		exists, err := chainExists(ip4t, dnatChain.table, dnatChain.name)
+		exists, err := utils.ChainExists(ip4t, dnatChain.table, dnatChain.name)
 		if err != nil {
 			return err
 		}
@@ -137,7 +137,7 @@ func checkPorts(config *PortMapConf, containerIP net.IP) error {
 	}
 
 	if ip6t != nil {
-		exists, err := chainExists(ip6t, dnatChain.table, dnatChain.name)
+		exists, err := utils.ChainExists(ip6t, dnatChain.table, dnatChain.name)
 		if err != nil {
 			return err
 		}

plugins/meta/portmap/portmap_integ_test.go

@@ -96,119 +96,133 @@ var _ = Describe("portmap integration tests", func() {
 		}
 	})
 
-	// This needs to be done using Ginkgo's asynchronous testing mode.
-	It("forwards a TCP port on ipv4", func(done Done) {
-		var err error
-		hostPort := rand.Intn(10000) + 1025
-		runtimeConfig := libcni.RuntimeConf{
-			ContainerID: fmt.Sprintf("unit-test-%d", hostPort),
-			NetNS:       targetNS.Path(),
-			IfName:      "eth0",
-			CapabilityArgs: map[string]interface{}{
-				"portMappings": []map[string]interface{}{
-					{
-						"hostPort":      hostPort,
-						"containerPort": containerPort,
-						"protocol":      "tcp",
+	Describe("Creating an interface in a namespace with the ptp plugin", func() {
+		// This needs to be done using Ginkgo's asynchronous testing mode.
+		It("forwards a TCP port on ipv4", func(done Done) {
+			var err error
+			hostPort := rand.Intn(10000) + 1025
+			runtimeConfig := libcni.RuntimeConf{
+				ContainerID: fmt.Sprintf("unit-test-%d", hostPort),
+				NetNS:       targetNS.Path(),
+				IfName:      "eth0",
+				CapabilityArgs: map[string]interface{}{
+					"portMappings": []map[string]interface{}{
+						{
+							"hostPort":      hostPort,
+							"containerPort": containerPort,
+							"protocol":      "tcp",
+						},
 					},
 				},
-			},
-		}
-
-		// 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)
-		}
 
-		// we'll also manually check the iptables chains
-		ipt, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
-		Expect(err).NotTo(HaveOccurred())
-		dnatChainName := genDnatChain("cni-portmap-unit-test", runtimeConfig.ContainerID).name
-
-		// Create the network
-		resI, err := cniConf.AddNetworkList(context.TODO(), configList, &runtimeConfig)
-		Expect(err).NotTo(HaveOccurred())
-		defer deleteNetwork()
-
-		// Undo Docker's forwarding policy
-		cmd := exec.Command("iptables", "-t", "filter",
-			"-P", "FORWARD", "ACCEPT")
-		cmd.Stderr = GinkgoWriter
-		err = cmd.Run()
-		Expect(err).NotTo(HaveOccurred())
-
-		// Check the chain exists
-		_, err = ipt.List("nat", dnatChainName)
-		Expect(err).NotTo(HaveOccurred())
-
-		result, err := current.GetResult(resI)
-		Expect(err).NotTo(HaveOccurred())
-		var contIP net.IP
-
-		for _, ip := range result.IPs {
-			intfIndex := *ip.Interface
-			if result.Interfaces[intfIndex].Sandbox == "" {
-				continue
+			// 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)
 			}
-			contIP = ip.Address.IP
-		}
-		if contIP == nil {
-			Fail("could not determine container IP")
-		}
 
-		hostIP := getLocalIP()
-		fmt.Fprintf(GinkgoWriter, "hostIP: %s:%d, contIP: %s:%d\n",
-			hostIP, hostPort, contIP, containerPort)
+			// we'll also manually check the iptables chains
+			ipt, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
+			Expect(err).NotTo(HaveOccurred())
+			dnatChainName := genDnatChain("cni-portmap-unit-test", runtimeConfig.ContainerID).name
 
-		// dump iptables-save output for debugging
-		cmd = exec.Command("iptables-save")
-		cmd.Stderr = GinkgoWriter
-		cmd.Stdout = GinkgoWriter
-		Expect(cmd.Run()).To(Succeed())
+			// Create the network
+			resI, err := cniConf.AddNetworkList(context.TODO(), configList, &runtimeConfig)
+			Expect(err).NotTo(HaveOccurred())
+			defer deleteNetwork()
 
-		// Sanity check: verify that the container is reachable directly
-		contOK := testEchoServer(contIP.String(), containerPort, "")
+			// Undo Docker's forwarding policy
+			cmd := exec.Command("iptables", "-t", "filter",
+				"-P", "FORWARD", "ACCEPT")
+			cmd.Stderr = GinkgoWriter
+			err = cmd.Run()
+			Expect(err).NotTo(HaveOccurred())
 
-		// Verify that a connection to the forwarded port works
-		dnatOK := testEchoServer(hostIP, hostPort, "")
+			// Check the chain exists
+			_, err = ipt.List("nat", dnatChainName)
+			Expect(err).NotTo(HaveOccurred())
 
-		// Verify that a connection to localhost works
-		snatOK := testEchoServer("127.0.0.1", hostPort, "")
+			result, err := current.GetResult(resI)
+			Expect(err).NotTo(HaveOccurred())
+			var contIP net.IP
 
-		// verify that hairpin works
-		hairpinOK := testEchoServer(hostIP, hostPort, targetNS.Path())
+			for _, ip := range result.IPs {
+				intfIndex := *ip.Interface
+				if result.Interfaces[intfIndex].Sandbox == "" {
+					continue
+				}
+				contIP = ip.Address.IP
+			}
+			if contIP == nil {
+				Fail("could not determine container IP")
+			}
 
-		// Cleanup
-		session.Terminate()
-		err = deleteNetwork()
-		Expect(err).NotTo(HaveOccurred())
+			hostIP := getLocalIP()
+			fmt.Fprintf(GinkgoWriter, "hostIP: %s:%d, contIP: %s:%d\n",
+				hostIP, hostPort, contIP, containerPort)
 
-		// Verify iptables rules are gone
-		_, err = ipt.List("nat", dnatChainName)
-		Expect(err).To(MatchError(ContainSubstring("iptables: No chain/target/match by that name.")))
+			// dump iptables-save output for debugging
+			cmd = exec.Command("iptables-save")
+			cmd.Stderr = GinkgoWriter
+			cmd.Stdout = GinkgoWriter
+			Expect(cmd.Run()).To(Succeed())
 
-		// Check that everything succeeded *after* we clean up the network
-		if !contOK {
-			Fail("connection direct to " + contIP.String() + " failed")
-		}
-		if !dnatOK {
-			Fail("Connection to " + hostIP + " was not forwarded")
-		}
-		if !snatOK {
-			Fail("connection to 127.0.0.1 was not forwarded")
-		}
-		if !hairpinOK {
-			Fail("Hairpin connection failed")
-		}
+			// dump ip routes output for debugging
+			cmd = exec.Command("ip", "route")
+			cmd.Stderr = GinkgoWriter
+			cmd.Stdout = GinkgoWriter
+			Expect(cmd.Run()).To(Succeed())
 
-		close(done)
+			// dump ip addresses output for debugging
+			cmd = exec.Command("ip", "addr")
+			cmd.Stderr = GinkgoWriter
+			cmd.Stdout = GinkgoWriter
+			Expect(cmd.Run()).To(Succeed())
 
-	}, TIMEOUT*9)
+			// Sanity check: verify that the container is reachable directly
+			contOK := testEchoServer(contIP.String(), containerPort, "")
+
+			// Verify that a connection to the forwarded port works
+			dnatOK := testEchoServer(hostIP, hostPort, "")
+
+			// Verify that a connection to localhost works
+			snatOK := testEchoServer("127.0.0.1", hostPort, "")
+
+			// verify that hairpin works
+			hairpinOK := testEchoServer(hostIP, hostPort, targetNS.Path())
+
+			// Cleanup
+			session.Terminate()
+			err = deleteNetwork()
+			Expect(err).NotTo(HaveOccurred())
+
+			// Verify iptables rules are gone
+			_, err = ipt.List("nat", dnatChainName)
+			Expect(err).To(MatchError(ContainSubstring("iptables: No chain/target/match by that name.")))
+
+			// Check that everything succeeded *after* we clean up the network
+			if !contOK {
+				Fail("connection direct to " + contIP.String() + " failed")
+			}
+			if !dnatOK {
+				Fail("Connection to " + hostIP + " was not forwarded")
+			}
+			if !snatOK {
+				Fail("connection to 127.0.0.1 was not forwarded")
+			}
+			if !hairpinOK {
+				Fail("Hairpin connection failed")
+			}
+
+			close(done)
+
+		}, TIMEOUT*9)
+	})
 })
 
 // testEchoServer returns true if we found an echo server on the port

scripts/release.sh

@@ -21,7 +21,7 @@ $DOCKER run -ti -v ${SRC_DIR}:/go/src/github.com/containernetworking/plugins --r
     apk --no-cache add bash tar;
     cd /go/src/github.com/containernetworking/plugins; umask 0022;
 
-    for arch in amd64 arm arm64 ppc64le s390x; do \
+    for arch in amd64 arm arm64 ppc64le s390x mips64le; do \
         rm -f ${OUTPUT_DIR}/*; \
         CGO_ENABLED=0 GOARCH=\$arch ./build_linux.sh ${BUILDFLAGS}; \
         for format in tgz; do \

vendor/github.com/coreos/go-iptables/iptables/iptables.go

@@ -48,9 +48,13 @@ func (e *Error) Error() string {
 
 // IsNotExist returns true if the error is due to the chain or rule not existing
 func (e *Error) IsNotExist() bool {
-	return e.ExitStatus() == 1 &&
-		(e.msg == fmt.Sprintf("%s: Bad rule (does a matching rule exist in that chain?).\n", getIptablesCommand(e.proto)) ||
-			e.msg == fmt.Sprintf("%s: No chain/target/match by that name.\n", getIptablesCommand(e.proto)))
+	if e.ExitStatus() != 1 {
+		return false
+	}
+	cmdIptables := getIptablesCommand(e.proto)
+	msgNoRuleExist := fmt.Sprintf("%s: Bad rule (does a matching rule exist in that chain?).\n", cmdIptables)
+	msgNoChainExist := fmt.Sprintf("%s: No chain/target/match by that name.\n", cmdIptables)
+	return strings.Contains(e.msg, msgNoRuleExist) || strings.Contains(e.msg, msgNoChainExist)
 }
 
 // Protocol to differentiate between IPv4 and IPv6
@@ -101,7 +105,13 @@ func NewWithProtocol(proto Protocol) (*IPTables, error) {
 		return nil, err
 	}
 	vstring, err := getIptablesVersionString(path)
+	if err != nil {
+		return nil, fmt.Errorf("could not get iptables version: %v", err)
+	}
 	v1, v2, v3, mode, err := extractIptablesVersion(vstring)
+	if err != nil {
+		return nil, fmt.Errorf("failed to extract iptables version from [%s]: %v", vstring, err)
+	}
 
 	checkPresent, waitPresent, randomFullyPresent := getIptablesCommandSupport(v1, v2, v3)
 
@@ -348,18 +358,6 @@ func (ipt *IPTables) executeList(args []string) ([]string, error) {
 		rules = rules[:len(rules)-1]
 	}
 
-	// nftables mode doesn't return an error code when listing a non-existent
-	// chain. Patch that up.
-	if len(rules) == 0 && ipt.mode == "nf_tables" {
-		v := 1
-		return nil, &Error{
-			cmd:        exec.Cmd{Args: args},
-			msg:        fmt.Sprintf("%s: No chain/target/match by that name.\n", getIptablesCommand(ipt.proto)),
-			proto:      ipt.proto,
-			exitStatus: &v,
-		}
-	}
-
 	for i, rule := range rules {
 		rules[i] = filterRuleOutput(rule)
 	}
@@ -437,6 +435,7 @@ func (ipt *IPTables) runWithOutput(args []string, stdout io.Writer) error {
 		}
 		ul, err := fmu.tryLock()
 		if err != nil {
+			syscall.Close(fmu.fd)
 			return err
 		}
 		defer ul.Unlock()

vendor/modules.txt

@@ -32,7 +32,7 @@ github.com/containernetworking/cni/pkg/skel
 github.com/containernetworking/cni/pkg/version
 github.com/containernetworking/cni/pkg/types/020
 github.com/containernetworking/cni/libcni
-# github.com/coreos/go-iptables v0.4.2
+# github.com/coreos/go-iptables v0.4.5
 github.com/coreos/go-iptables/iptables
 # github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7
 github.com/coreos/go-systemd/activation