248 lines
6.2 KiB
Go
248 lines
6.2 KiB
Go
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// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ipv4_test
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import (
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"bytes"
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"net"
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"os"
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"runtime"
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"testing"
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"time"
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"golang.org/x/net/icmp"
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"golang.org/x/net/internal/iana"
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"golang.org/x/net/internal/nettest"
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"golang.org/x/net/ipv4"
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)
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func TestPacketConnReadWriteUnicastUDP(t *testing.T) {
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switch runtime.GOOS {
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case "nacl", "plan9", "windows":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
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if ifi == nil {
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t.Skipf("not available on %s", runtime.GOOS)
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}
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c, err := nettest.NewLocalPacketListener("udp4")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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p := ipv4.NewPacketConn(c)
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defer p.Close()
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dst := c.LocalAddr()
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cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
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wb := []byte("HELLO-R-U-THERE")
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for i, toggle := range []bool{true, false, true} {
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if err := p.SetControlMessage(cf, toggle); err != nil {
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if nettest.ProtocolNotSupported(err) {
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t.Logf("not supported on %s", runtime.GOOS)
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continue
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}
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t.Fatal(err)
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}
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p.SetTTL(i + 1)
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if err := p.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
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t.Fatal(err)
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}
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if n, err := p.WriteTo(wb, nil, dst); err != nil {
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t.Fatal(err)
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} else if n != len(wb) {
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t.Fatalf("got %v; want %v", n, len(wb))
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}
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rb := make([]byte, 128)
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if err := p.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
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t.Fatal(err)
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}
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if n, _, _, err := p.ReadFrom(rb); err != nil {
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t.Fatal(err)
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} else if !bytes.Equal(rb[:n], wb) {
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t.Fatalf("got %v; want %v", rb[:n], wb)
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}
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}
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}
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func TestPacketConnReadWriteUnicastICMP(t *testing.T) {
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switch runtime.GOOS {
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case "nacl", "plan9", "windows":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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if m, ok := nettest.SupportsRawIPSocket(); !ok {
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t.Skip(m)
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}
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ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
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if ifi == nil {
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t.Skipf("not available on %s", runtime.GOOS)
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}
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c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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dst, err := net.ResolveIPAddr("ip4", "127.0.0.1")
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if err != nil {
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t.Fatal(err)
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}
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p := ipv4.NewPacketConn(c)
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defer p.Close()
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cf := ipv4.FlagDst | ipv4.FlagInterface
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if runtime.GOOS != "solaris" {
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// Solaris never allows to modify ICMP properties.
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cf |= ipv4.FlagTTL
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}
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for i, toggle := range []bool{true, false, true} {
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wb, err := (&icmp.Message{
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Type: ipv4.ICMPTypeEcho, Code: 0,
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Body: &icmp.Echo{
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ID: os.Getpid() & 0xffff, Seq: i + 1,
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Data: []byte("HELLO-R-U-THERE"),
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},
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}).Marshal(nil)
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if err != nil {
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t.Fatal(err)
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}
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if err := p.SetControlMessage(cf, toggle); err != nil {
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if nettest.ProtocolNotSupported(err) {
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t.Logf("not supported on %s", runtime.GOOS)
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continue
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}
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t.Fatal(err)
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}
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p.SetTTL(i + 1)
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if err := p.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
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t.Fatal(err)
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}
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if n, err := p.WriteTo(wb, nil, dst); err != nil {
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t.Fatal(err)
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} else if n != len(wb) {
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t.Fatalf("got %v; want %v", n, len(wb))
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}
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rb := make([]byte, 128)
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loop:
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if err := p.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
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t.Fatal(err)
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}
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if n, _, _, err := p.ReadFrom(rb); err != nil {
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switch runtime.GOOS {
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case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
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t.Logf("not supported on %s", runtime.GOOS)
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continue
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}
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t.Fatal(err)
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} else {
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m, err := icmp.ParseMessage(iana.ProtocolICMP, rb[:n])
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if err != nil {
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t.Fatal(err)
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}
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if runtime.GOOS == "linux" && m.Type == ipv4.ICMPTypeEcho {
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// On Linux we must handle own sent packets.
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goto loop
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}
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if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
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t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
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}
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}
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}
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}
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func TestRawConnReadWriteUnicastICMP(t *testing.T) {
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switch runtime.GOOS {
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case "nacl", "plan9", "windows":
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t.Skipf("not supported on %s", runtime.GOOS)
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}
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if m, ok := nettest.SupportsRawIPSocket(); !ok {
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t.Skip(m)
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}
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ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
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if ifi == nil {
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t.Skipf("not available on %s", runtime.GOOS)
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}
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c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
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if err != nil {
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t.Fatal(err)
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}
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defer c.Close()
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dst, err := net.ResolveIPAddr("ip4", "127.0.0.1")
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if err != nil {
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t.Fatal(err)
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}
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r, err := ipv4.NewRawConn(c)
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if err != nil {
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t.Fatal(err)
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}
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defer r.Close()
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cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
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for i, toggle := range []bool{true, false, true} {
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wb, err := (&icmp.Message{
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Type: ipv4.ICMPTypeEcho, Code: 0,
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Body: &icmp.Echo{
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ID: os.Getpid() & 0xffff, Seq: i + 1,
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Data: []byte("HELLO-R-U-THERE"),
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},
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}).Marshal(nil)
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if err != nil {
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t.Fatal(err)
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}
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wh := &ipv4.Header{
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Version: ipv4.Version,
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Len: ipv4.HeaderLen,
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TOS: i + 1,
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TotalLen: ipv4.HeaderLen + len(wb),
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TTL: i + 1,
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Protocol: 1,
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Dst: dst.IP,
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}
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if err := r.SetControlMessage(cf, toggle); err != nil {
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if nettest.ProtocolNotSupported(err) {
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t.Logf("not supported on %s", runtime.GOOS)
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continue
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}
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t.Fatal(err)
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}
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if err := r.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
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t.Fatal(err)
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}
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if err := r.WriteTo(wh, wb, nil); err != nil {
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t.Fatal(err)
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}
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rb := make([]byte, ipv4.HeaderLen+128)
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loop:
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if err := r.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
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t.Fatal(err)
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}
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if _, b, _, err := r.ReadFrom(rb); err != nil {
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switch runtime.GOOS {
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case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
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t.Logf("not supported on %s", runtime.GOOS)
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continue
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}
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t.Fatal(err)
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} else {
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m, err := icmp.ParseMessage(iana.ProtocolICMP, b)
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if err != nil {
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t.Fatal(err)
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}
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if runtime.GOOS == "linux" && m.Type == ipv4.ICMPTypeEcho {
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// On Linux we must handle own sent packets.
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goto loop
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}
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if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
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t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
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}
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}
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}
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}
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