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// 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)
}
}
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