Update netlink dependency.

vendor/github.com/vishvananda/netlink/socket_test.go

@@ -0,0 +1,60 @@
+// +build linux
+
+package netlink
+
+import (
+	"log"
+	"net"
+	"os"
+	"os/user"
+	"strconv"
+	"testing"
+)
+
+func TestSocketGet(t *testing.T) {
+	if os.Getenv("TRAVIS_BUILD_DIR") != "" {
+		t.Skipf("Goroutines + network namespaces == inconsistent results")
+	}
+	addr, err := net.ResolveTCPAddr("tcp", "localhost:0")
+	if err != nil {
+		log.Fatal(err)
+	}
+	l, err := net.ListenTCP("tcp", addr)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer l.Close()
+
+	conn, err := net.Dial(l.Addr().Network(), l.Addr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer conn.Close()
+
+	localAddr := conn.LocalAddr().(*net.TCPAddr)
+	remoteAddr := conn.RemoteAddr().(*net.TCPAddr)
+	socket, err := SocketGet(localAddr, remoteAddr)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if got, want := socket.ID.Source, localAddr.IP; !got.Equal(want) {
+		t.Fatalf("local ip = %v, want %v", got, want)
+	}
+	if got, want := socket.ID.Destination, remoteAddr.IP; !got.Equal(want) {
+		t.Fatalf("remote ip = %v, want %v", got, want)
+	}
+	if got, want := int(socket.ID.SourcePort), localAddr.Port; got != want {
+		t.Fatalf("local port = %d, want %d", got, want)
+	}
+	if got, want := int(socket.ID.DestinationPort), remoteAddr.Port; got != want {
+		t.Fatalf("remote port = %d, want %d", got, want)
+	}
+	u, err := user.Current()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if got, want := strconv.Itoa(int(socket.UID)), u.Uid; got != want {
+		t.Fatalf("UID = %s, want %s", got, want)
+	}
+}