// Copyright 2013 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. //go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd package net import ( "fmt" "os" "os/exec" "runtime" "strings" "testing" "time" ) type testInterface struct { name string local string remote string setupCmds []*exec.Cmd teardownCmds []*exec.Cmd } func (ti *testInterface) setup() error { for _, cmd := range ti.setupCmds { if out, err := cmd.CombinedOutput(); err != nil { return fmt.Errorf("args=%v out=%q err=%v", cmd.Args, string(out), err) } } return nil } func (ti *testInterface) teardown() error { for _, cmd := range ti.teardownCmds { if out, err := cmd.CombinedOutput(); err != nil { return fmt.Errorf("args=%v out=%q err=%v ", cmd.Args, string(out), err) } } return nil } func TestPointToPointInterface(t *testing.T) { if testing.Short() { t.Skip("avoid external network") } if runtime.GOOS == "darwin" || runtime.GOOS == "ios" { t.Skipf("not supported on %s", runtime.GOOS) } if os.Getuid() != 0 { t.Skip("must be root") } // We suppose that using IPv4 link-local addresses doesn't // harm anyone. local, remote := "169.254.0.1", "169.254.0.254" ip := ParseIP(remote) for i := 0; i < 3; i++ { ti := &testInterface{local: local, remote: remote} if err := ti.setPointToPoint(5963 + i); err != nil { t.Skipf("test requires external command: %v", err) } if err := ti.setup(); err != nil { if e := err.Error(); strings.Contains(e, "No such device") && strings.Contains(e, "gre0") { t.Skip("skipping test; no gre0 device. likely running in container?") } t.Fatal(err) } else { time.Sleep(3 * time.Millisecond) } ift, err := Interfaces() if err != nil { ti.teardown() t.Fatal(err) } for _, ifi := range ift { if ti.name != ifi.Name { continue } ifat, err := ifi.Addrs() if err != nil { ti.teardown() t.Fatal(err) } for _, ifa := range ifat { if ip.Equal(ifa.(*IPNet).IP) { ti.teardown() t.Fatalf("got %v", ifa) } } } if err := ti.teardown(); err != nil { t.Fatal(err) } else { time.Sleep(3 * time.Millisecond) } } } func TestInterfaceArrivalAndDeparture(t *testing.T) { if testing.Short() { t.Skip("avoid external network") } if os.Getuid() != 0 { t.Skip("must be root") } // We suppose that using IPv4 link-local addresses and the // dot1Q ID for Token Ring and FDDI doesn't harm anyone. local, remote := "169.254.0.1", "169.254.0.254" ip := ParseIP(remote) for _, vid := range []int{1002, 1003, 1004, 1005} { ift1, err := Interfaces() if err != nil { t.Fatal(err) } ti := &testInterface{local: local, remote: remote} if err := ti.setBroadcast(vid); err != nil { t.Skipf("test requires external command: %v", err) } if err := ti.setup(); err != nil { t.Fatal(err) } else { time.Sleep(3 * time.Millisecond) } ift2, err := Interfaces() if err != nil { ti.teardown() t.Fatal(err) } if len(ift2) <= len(ift1) { for _, ifi := range ift1 { t.Logf("before: %v", ifi) } for _, ifi := range ift2 { t.Logf("after: %v", ifi) } ti.teardown() t.Fatalf("got %v; want gt %v", len(ift2), len(ift1)) } for _, ifi := range ift2 { if ti.name != ifi.Name { continue } ifat, err := ifi.Addrs() if err != nil { ti.teardown() t.Fatal(err) } for _, ifa := range ifat { if ip.Equal(ifa.(*IPNet).IP) { ti.teardown() t.Fatalf("got %v", ifa) } } } if err := ti.teardown(); err != nil { t.Fatal(err) } else { time.Sleep(3 * time.Millisecond) } ift3, err := Interfaces() if err != nil { t.Fatal(err) } if len(ift3) >= len(ift2) { for _, ifi := range ift2 { t.Logf("before: %v", ifi) } for _, ifi := range ift3 { t.Logf("after: %v", ifi) } t.Fatalf("got %v; want lt %v", len(ift3), len(ift2)) } } } func TestInterfaceArrivalAndDepartureZoneCache(t *testing.T) { if testing.Short() { t.Skip("avoid external network") } if os.Getuid() != 0 { t.Skip("must be root") } // Ensure zoneCache is filled: _, _ = Listen("tcp", "[fe80::1%nonexistent]:0") ti := &testInterface{local: "fe80::1"} if err := ti.setLinkLocal(0); err != nil { t.Skipf("test requires external command: %v", err) } if err := ti.setup(); err != nil { t.Fatal(err) } defer ti.teardown() time.Sleep(3 * time.Millisecond) // If Listen fails (on Linux with “bind: invalid argument”), zoneCache was // not updated when encountering a nonexistent interface: ln, err := Listen("tcp", "[fe80::1%"+ti.name+"]:0") if err != nil { t.Fatal(err) } ln.Close() if err := ti.teardown(); err != nil { t.Fatal(err) } }