pkg,plugins: update for Result struct Interface index changes

It's a pointer now, so we need to use the helper function to set
the field and also test for nil before accessing it.

pkg/ipam/ipam.go

@@ -53,7 +53,11 @@ func ConfigureIface(ifName string, res *current.Result) error {
 
 	var v4gw, v6gw net.IP
 	for _, ipc := range res.IPs {
-		if int(ipc.Interface) >= len(res.Interfaces) || res.Interfaces[ipc.Interface].Name != ifName {
+		if ipc.Interface == nil {
+			continue
+		}
+		intIdx := *ipc.Interface
+		if intIdx < 0 || intIdx >= len(res.Interfaces) || res.Interfaces[intIdx].Name != ifName {
 			// IP address is for a different interface
 			return fmt.Errorf("failed to add IP addr %v to %q: invalid interface index", ipc, ifName)
 		}

pkg/ipam/ipam_test.go

@@ -109,13 +109,13 @@ var _ = Describe("IPAM Operations", func() {
 			IPs: []*current.IPConfig{
 				{
 					Version:   "4",
-					Interface: 0,
+					Interface: current.Int(0),
 					Address:   *ipv4,
 					Gateway:   ipgw4,
 				},
 				{
 					Version:   "6",
-					Interface: 0,
+					Interface: current.Int(0),
 					Address:   *ipv6,
 					Gateway:   ipgw6,
 				},
@@ -226,7 +226,7 @@ var _ = Describe("IPAM Operations", func() {
 	})
 
 	It("returns an error when the interface index doesn't match the link name", func() {
-		result.IPs[0].Interface = 1
+		result.IPs[0].Interface = current.Int(1)
 		err := originalNS.Do(func(ns.NetNS) error {
 			return ConfigureIface(LINK_NAME, result)
 		})
@@ -234,7 +234,15 @@ var _ = Describe("IPAM Operations", func() {
 	})
 
 	It("returns an error when the interface index is too big", func() {
-		result.IPs[0].Interface = 2
+		result.IPs[0].Interface = current.Int(2)
+		err := originalNS.Do(func(ns.NetNS) error {
+			return ConfigureIface(LINK_NAME, result)
+		})
+		Expect(err).To(HaveOccurred())
+	})
+
+	It("returns an error when the interface index is too small", func() {
+		result.IPs[0].Interface = current.Int(-1)
 		err := originalNS.Do(func(ns.NetNS) error {
 			return ConfigureIface(LINK_NAME, result)
 		})
@@ -255,4 +263,37 @@ var _ = Describe("IPAM Operations", func() {
 		})
 		Expect(err).To(HaveOccurred())
 	})
+
+	It("does not panic when interface is not specified", func() {
+		result = &current.Result{
+			Interfaces: []*current.Interface{
+				{
+					Name:    "eth0",
+					Mac:     "00:11:22:33:44:55",
+					Sandbox: "/proc/3553/ns/net",
+				},
+				{
+					Name:    "fake0",
+					Mac:     "00:33:44:55:66:77",
+					Sandbox: "/proc/1234/ns/net",
+				},
+			},
+			IPs: []*current.IPConfig{
+				{
+					Version: "4",
+					Address: *ipv4,
+					Gateway: ipgw4,
+				},
+				{
+					Version: "6",
+					Address: *ipv6,
+					Gateway: ipgw6,
+				},
+			},
+		}
+		err := originalNS.Do(func(ns.NetNS) error {
+			return ConfigureIface(LINK_NAME, result)
+		})
+		Expect(err).NotTo(HaveOccurred())
+	})
 })

plugins/ipam/host-local/host_local_test.go

@@ -87,7 +87,6 @@ var _ = Describe("host-local Operations", func() {
 		Expect(*result.IPs[0]).To(Equal(
 			current.IPConfig{
 				Version: "4",
-				Interface: 0,
 				Address: mustCIDR("10.1.2.2/24"),
 				Gateway: net.ParseIP("10.1.2.1"),
 			}))
@@ -95,7 +94,6 @@ var _ = Describe("host-local Operations", func() {
 		Expect(*result.IPs[1]).To(Equal(
 			current.IPConfig{
 				Version: "6",
-				Interface: 0,
 				Address: mustCIDR("2001:db8:1::2/64"),
 				Gateway: net.ParseIP("2001:db8:1::1"),
 			},
@@ -103,10 +101,10 @@ var _ = Describe("host-local Operations", func() {
 		Expect(len(result.IPs)).To(Equal(2))
 
 		Expect(result.Routes).To(Equal([]*types.Route{
-			&types.Route{Dst: mustCIDR("0.0.0.0/0"), GW: nil},
+			{Dst: mustCIDR("0.0.0.0/0"), GW: nil},
-			&types.Route{Dst: mustCIDR("::/0"), GW: nil},
+			{Dst: mustCIDR("::/0"), GW: nil},
-			&types.Route{Dst: mustCIDR("192.168.0.0/16"), GW: net.ParseIP("1.1.1.1")},
+			{Dst: mustCIDR("192.168.0.0/16"), GW: net.ParseIP("1.1.1.1")},
-			&types.Route{Dst: mustCIDR("2001:db8:2::0/64"), GW: net.ParseIP("2001:db8:3::1")},
+			{Dst: mustCIDR("2001:db8:2::0/64"), GW: net.ParseIP("2001:db8:3::1")},
 		}))
 
 		ipFilePath1 := filepath.Join(tmpDir, "mynet", "10.1.2.2")

plugins/main/bridge/bridge.go

@@ -100,7 +100,7 @@ func calcGateways(result *current.Result, n *NetConf) (*gwInfo, *gwInfo, error)
 		defaultNet.Mask = net.IPMask(defaultNet.IP)
 
 		// All IPs currently refer to the container interface
-		ipc.Interface = 2
+		ipc.Interface = current.Int(2)
 
 		// If not provided, calculate the gateway address corresponding
 		// to the selected IP address

plugins/main/ipvlan/ipvlan.go

@@ -159,7 +159,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 	for _, ipc := range result.IPs {
 		// All addresses belong to the ipvlan interface
-		ipc.Interface = 0
+		ipc.Interface = current.Int(0)
 	}
 
 	result.Interfaces = []*current.Interface{ipvlanInterface}

plugins/main/macvlan/macvlan.go

@@ -179,7 +179,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 
 	for _, ipc := range result.IPs {
 		// All addresses apply to the container macvlan interface
-		ipc.Interface = 0
+		ipc.Interface = current.Int(0)
 	}
 
 	err = netns.Do(func(_ ns.NetNS) error {

plugins/main/ptp/ptp.go

@@ -75,7 +75,7 @@ func setupContainerVeth(netns ns.NetNS, ifName string, mtu int, pr *current.Resu
 
 		for _, ipc := range pr.IPs {
 			// All addresses apply to the container veth interface
-			ipc.Interface = 1
+			ipc.Interface = current.Int(1)
 		}
 
 		pr.Interfaces = []*current.Interface{hostInterface, containerInterface}

plugins/main/vlan/vlan.go

@@ -148,7 +148,7 @@ func cmdAdd(args *skel.CmdArgs) error {
 	}
 	for _, ipc := range result.IPs {
 		// All addresses belong to the vlan interface
-		ipc.Interface = 0
+		ipc.Interface = current.Int(0)
 	}
 
 	result.Interfaces = []*current.Interface{vlanInterface}

plugins/meta/portmap/main.go

@@ -164,10 +164,15 @@ func parseConfig(stdin []byte, ifName string) (*PortMapConf, error) {
 			}
 
 			// Skip known non-sandbox interfaces
-			intIdx := ip.Interface
+			if ip.Interface != nil {
-			if intIdx >= 0 && intIdx < len(conf.PrevResult.Interfaces) && conf.PrevResult.Interfaces[intIdx].Name != ifName {
+				intIdx := *ip.Interface
+				if intIdx >= 0 &&
+					intIdx < len(conf.PrevResult.Interfaces) &&
+					(conf.PrevResult.Interfaces[intIdx].Name != ifName ||
+						conf.PrevResult.Interfaces[intIdx].Sandbox == "") {
 					continue
 				}
+			}
 			switch ip.Version {
 			case "6":
 				conf.ContIPv6 = ip.Address.IP

plugins/meta/portmap/portmap_integ_test.go

@@ -134,7 +134,8 @@ var _ = Describe("portmap integration tests", func() {
 		var contIP net.IP
 
 		for _, ip := range result.IPs {
-			if result.Interfaces[ip.Interface].Sandbox == "" {
+			intfIndex := *ip.Interface
+			if result.Interfaces[intfIndex].Sandbox == "" {
 				continue
 			}
 			contIP = ip.Address.IP

plugins/meta/portmap/portmap_test.go

@@ -124,6 +124,34 @@ var _ = Describe("portmapping configuration", func() {
 			_, err := parseConfig(configBytes, "container")
 			Expect(err).To(MatchError("Invalid host port number: 0"))
 		})
+
+		It("Does not fail on missing prevResult interface index", func() {
+			configBytes := []byte(`{
+	"name": "test",
+	"type": "portmap",
+	"cniVersion": "0.3.1",
+	"runtimeConfig": {
+		"portMappings": [
+			{ "hostPort": 8080, "containerPort": 80, "protocol": "tcp"}
+		]
+	},
+	"conditionsV4": ["a", "b"],
+	"prevResult": {
+		"interfaces": [
+			{"name": "host"}
+		],
+		"ips": [
+			{
+				"version": "4",
+				"address": "10.0.0.1/24",
+				"gateway": "10.0.0.1"
+			}
+		]
+	}
+}`)
+			_, err := parseConfig(configBytes, "container")
+			Expect(err).NotTo(HaveOccurred())
+		})
 	})
 
 	Describe("Generating chains", func() {

plugins/sample/main.go

@@ -106,7 +106,10 @@ func cmdAdd(args *skel.CmdArgs) error {
 		}
 	} else {
 		for _, ip := range conf.PrevResult.IPs {
-			intIdx := ip.Interface
+			if ip.Interface == nil {
+				continue
+			}
+			intIdx := *ip.Interface
 			// Every IP is indexed in to the interfaces array, with "-1" standing
 			// for an unknown interface (which we'll assume to be Container-side
 			// Skip all IPs we know belong to an interface with the wrong name.