func TestRawConnMulticastSocketOptions(t *testing.T) {
switch runtime.GOOS {
case "nacl", "plan9", "solaris":
t.Skipf("not supported on %q", runtime.GOOS)
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
if ifi == nil {
t.Skipf("not available on %q", runtime.GOOS)
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
testMulticastSocketOptions(t, r, ifi, &net.IPAddr{IP: net.IPv4(224, 0, 0, 250)}) /// see RFC 4727
}
func TestRawConnUnicastSocketOptions(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Skipf("not supported on %q", runtime.GOOS)
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
ifi := loopbackInterface()
if ifi == nil {
t.Skipf("not available on %q", runtime.GOOS)
}
c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
testUnicastSocketOptions(t, r)
}
func TestReadWriteUnicastIPDatagram(t *testing.T) {
if os.Getuid() != 0 {
t.Logf("skipping test; must be root")
return
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
dst, err := net.ResolveIPAddr("ip4", "127.0.0.1")
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
id := os.Getpid() & 0xffff
pld := newICMPEchoRequest(id, 1, 128, []byte("HELLO-R-U-THERE"))
runDatagramTransponder(t, r, pld, nil, dst)
}
func ExampleWriteIPOSPFHello() {
var ifs []*net.Interface
en0, err := net.InterfaceByName("en0")
if err != nil {
log.Fatal(err)
}
ifs = append(ifs, en0)
en1, err := net.InterfaceByIndex(911)
if err != nil {
log.Fatal(err)
}
ifs = append(ifs, en1)
c, err := net.ListenPacket("ip4:89", "0.0.0.0")
if err != nil {
log.Fatal(err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
log.Fatal(err)
}
for _, ifi := range ifs {
err := r.JoinGroup(ifi, &net.IPAddr{IP: AllSPFRouters})
if err != nil {
log.Fatal(err)
}
err = r.JoinGroup(ifi, &net.IPAddr{IP: AllDRouters})
if err != nil {
log.Fatal(err)
}
}
hello := make([]byte, OSPFHelloHeaderLen)
ospf := make([]byte, OSPFHeaderLen)
ospf[0] = OSPF_VERSION
ospf[1] = OSPF_TYPE_HELLO
ospf = append(ospf, hello...)
iph := &ipv4.Header{}
iph.Version = ipv4.Version
iph.Len = ipv4.HeaderLen
iph.TOS = ipv4.DSCP_CS6
iph.TotalLen = ipv4.HeaderLen + len(ospf)
iph.TTL = 1
iph.Protocol = 89
iph.Dst = AllSPFRouters
for _, ifi := range ifs {
err := r.SetMulticastInterface(ifi)
if err != nil {
return
}
err = r.WriteTo(iph, ospf, nil)
if err != nil {
return
}
}
}
func TestReadWriteMulticastIPDatagram(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
ifi := loopbackInterface()
if ifi == nil {
t.Skip("an appropriate interface not found")
}
dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
if err := r.JoinGroup(ifi, dst); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
if err := r.SetMulticastInterface(ifi); err != nil {
t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmpMessage{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmpEcho{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal()
if err != nil {
t.Fatalf("icmpMessage.Marshal failed: %v", err)
}
if err := r.SetControlMessage(cf, toggle); err != nil {
t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
}
rb := writeThenReadDatagram(t, i, r, wb, nil, dst)
m, err := parseICMPMessage(rb)
if err != nil {
t.Fatalf("parseICMPMessage failed: %v", err)
}
if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
func (rdns *RawDNS) DnsQuery(wg *sync.WaitGroup, config *config.Config, cm *chanman.ChanMan) {
defer wg.Done()
//set the IP headers
rdns.IPHeaders.Src = rdns.LocalAddress
rdns.IPHeaders.Dst = rdns.RemoteAddress
rdns.IPHeaders.Protocol = IPProtoUDP
rdns.IPHeaders.Len = IPHeaderLen
rdns.IPHeaders.Version = 4
rdns.IPHeaders.TTL = 128
//set the query
query := NewQuery()
query.SetRequest(config.Query, "A")
queryb := query.Marshal()
//set the UDP headers
rdns.UDPHeader.SetLen(8 + uint16(len(queryb)))
rdns.UDPHeader.GenRandomSrcPort()
rdns.UDPHeader.SetChecksum(0)
udpHead, _ := rdns.UDPHeader.Marshal()
//set the control message
rdns.CtrlMsg.TTL = 128
rdns.CtrlMsg.IfIndex = config.Interface.Index
//ip on mac, ip4:udp for linux
con, err := net.ListenPacket("ip4:udp", "0.0.0.0")
if err != nil {
log.Fatalln(err)
}
//new raw packet connection
rawCon, err := ipv4.NewRawConn(con)
if err != nil {
log.Fatalln(err)
}
//set query
//query := []byte{0x0d, 0x35, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x64, 0x61, 0x69, 0x73, 0x79, 0x06, 0x75, 0x62, 0x75, 0x6e, 0x74, 0x75, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x01, 0x00, 0x01}
//set final payload
//set packet length
rdns.IPHeaders.TotalLen = 20 + len(queryb) + len(udpHead)
rdns.Payload = make([]byte, 0)
rdns.Payload = append(rdns.Payload, udpHead...)
rdns.Payload = append(rdns.Payload, queryb...)
rawCon.WriteTo(rdns.IPHeaders, rdns.Payload, rdns.CtrlMsg)
cm.RunChan <- true
}
func TestIPPerInterfaceSingleRawConnWithSingleGroupListener(t *testing.T) {
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("not supported on %q", runtime.GOOS)
}
if testing.Short() {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
gaddr := net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
type ml struct {
c *ipv4.RawConn
ifi *net.Interface
}
var mlt []*ml
ift, err := net.Interfaces()
if err != nil {
t.Fatalf("net.Interfaces failed: %v", err)
}
for i, ifi := range ift {
ip, ok := nettest.IsMulticastCapable("ip4", &ifi)
if !ok {
continue
}
c, err := net.ListenPacket("ip4:253", ip.String()) // unicast address
if err != nil {
t.Fatalf("net.ListenPacket with %v failed: %v", ip, err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
if err := r.JoinGroup(&ifi, &gaddr); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
mlt = append(mlt, &ml{r, &ift[i]})
}
for _, m := range mlt {
if err := m.c.LeaveGroup(m.ifi, &gaddr); err != nil {
t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", m.ifi, err)
}
}
}
func TestIPPerInterfaceSingleConnWithSingleGroupListener(t *testing.T) {
if testing.Short() || !*testExternal {
t.Logf("skipping test to avoid external network")
return
}
if os.Getuid() != 0 {
t.Logf("skipping test; must be root")
return
}
gaddr := &net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
type ml struct {
c *ipv4.RawConn
ifi *net.Interface
}
var mlt []*ml
ift, err := net.Interfaces()
if err != nil {
t.Fatalf("net.Interfaces failed: %v", err)
}
for i, ifi := range ift {
ip, ok := isGoodForMulticast(&ifi)
if !ok {
continue
}
// listen to a unicast interface address
c, err := net.ListenPacket("ip4:253", ip.String()) // see RFC 4727
if err != nil {
t.Fatalf("net.ListenPacket with %v failed: %v", ip, err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
if err := r.JoinGroup(&ifi, gaddr); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
mlt = append(mlt, &ml{r, &ift[i]})
}
for _, m := range mlt {
if err := m.c.LeaveGroup(m.ifi, gaddr); err != nil {
t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", m.ifi, err)
}
}
}
func TestReadWriteUnicastIPDatagram(t *testing.T) {
if os.Getuid() != 0 {
t.Logf("skipping test; must be root")
return
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
dst, err := net.ResolveIPAddr("ip4", "127.0.0.1")
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmpMessage{
Type: icmpv4EchoRequest, Code: 0,
Body: &icmpEcho{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal()
if err != nil {
t.Fatalf("icmpMessage.Marshal failed: %v", err)
}
if err := r.SetControlMessage(cf, toggle); err != nil {
t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
}
rb := writeThenReadDatagram(t, i, r, wb, nil, dst)
m, err := parseICMPMessage(rb)
if err != nil {
t.Fatalf("parseICMPMessage failed: %v", err)
}
if m.Type != icmpv4EchoReply || m.Code != 0 {
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, icmpv4EchoReply, 0)
}
}
}
func TestIPSingleRawConnWithSingleGroupListener(t *testing.T) {
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("not supported on %q", runtime.GOOS)
}
if testing.Short() {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0") // wildcard address
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.RawConn failed: %v", err)
}
gaddr := net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
var mift []*net.Interface
ift, err := net.Interfaces()
if err != nil {
t.Fatalf("net.Interfaces failed: %v", err)
}
for i, ifi := range ift {
if _, ok := nettest.IsMulticastCapable("ip4", &ifi); !ok {
continue
}
if err := r.JoinGroup(&ifi, &gaddr); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
mift = append(mift, &ift[i])
}
for _, ifi := range mift {
if err := r.LeaveGroup(ifi, &gaddr); err != nil {
t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", ifi, err)
}
}
}
func TestIPSingleConnWithSingleGroupListener(t *testing.T) {
if testing.Short() || !*testExternal {
t.Logf("skipping test to avoid external network")
return
}
if os.Getuid() != 0 {
t.Logf("skipping test; must be root")
return
}
// listen to a wildcard address
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.RawConn failed: %v", err)
}
gaddr := &net.IPAddr{IP: net.IPv4(224, 0, 0, 254)} // see RFC 4727
var mift []*net.Interface
ift, err := net.Interfaces()
if err != nil {
t.Fatalf("net.Interfaces failed: %v", err)
}
for i, ifi := range ift {
if _, ok := isGoodForMulticast(&ifi); !ok {
continue
}
if err := r.JoinGroup(&ifi, gaddr); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
mift = append(mift, &ift[i])
}
for _, ifi := range mift {
if err := r.LeaveGroup(ifi, gaddr); err != nil {
t.Fatalf("ipv4.RawConn.LeaveGroup on %v failed: %v", ifi, err)
}
}
}
func TestIPMulticastSockopt(t *testing.T) {
if testing.Short() || !*testExternal {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
for _, tt := range multicastSockoptTests {
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
r, _ := ipv4.NewRawConn(c)
testMulticastSockopt(t, tt, r, &net.IPAddr{IP: tt.gaddr})
}
}
func TestReadWriteMulticastIPDatagram(t *testing.T) {
if testing.Short() || !*testExternal {
t.Logf("skipping test to avoid external network")
return
}
if os.Getuid() != 0 {
t.Logf("skipping test; must be root")
return
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
ifi := loopbackInterface()
if ifi == nil {
t.Logf("skipping test; an appropriate interface not found")
return
}
dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
if err := r.JoinGroup(ifi, dst); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
if err := r.SetMulticastInterface(ifi); err != nil {
t.Fatalf("ipv4.PacketConn.SetMulticastInterface failed: %v", err)
}
id := os.Getpid() & 0xffff
pld := newICMPEchoRequest(id, 1, 128, []byte("HELLO-R-U-THERE"))
runDatagramTransponder(t, r, pld, nil, dst)
}
func TestIPUnicastSockopt(t *testing.T) {
if os.Getuid() != 0 {
t.Skip("must be root")
}
for _, tt := range unicastSockoptTests {
c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
if err != nil {
t.Errorf("net.ListenPacket failed: %v", err)
return
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Errorf("ipv4.NewRawConn failed: %v", err)
return
}
if err := testUnicastSockopt(t, tt, r); err != nil {
break
}
}
}
func TestRawConnReadWriteMulticastICMP(t *testing.T) {
if testing.Short() {
t.Skip("to avoid external network")
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
if ifi == nil {
t.Skipf("not available on %q", runtime.GOOS)
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
dst, err := net.ResolveIPAddr("ip4", "224.0.0.254") // see RFC 4727
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
defer r.Close()
if err := r.JoinGroup(ifi, dst); err != nil {
t.Fatalf("ipv4.RawConn.JoinGroup on %v failed: %v", ifi, err)
}
if err := r.SetMulticastInterface(ifi); err != nil {
t.Fatalf("ipv4.RawConn.SetMulticastInterface failed: %v", err)
}
if _, err := r.MulticastInterface(); err != nil {
t.Fatalf("ipv4.RawConn.MulticastInterface failed: %v", err)
}
if err := r.SetMulticastLoopback(true); err != nil {
t.Fatalf("ipv4.RawConn.SetMulticastLoopback failed: %v", err)
}
if _, err := r.MulticastLoopback(); err != nil {
t.Fatalf("ipv4.RawConn.MulticastLoopback failed: %v", err)
}
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal(nil)
if err != nil {
t.Fatalf("icmp.Message.Marshal failed: %v", err)
}
wh := &ipv4.Header{
Version: ipv4.Version,
Len: ipv4.HeaderLen,
TOS: i + 1,
TotalLen: ipv4.HeaderLen + len(wb),
Protocol: 1,
Dst: dst.IP,
}
if err := r.SetControlMessage(cf, toggle); err != nil {
if protocolNotSupported(err) {
t.Skipf("not supported on %q", runtime.GOOS)
}
t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
}
if err := r.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
t.Fatalf("ipv4.RawConn.SetDeadline failed: %v", err)
}
r.SetMulticastTTL(i + 1)
if err := r.WriteTo(wh, wb, nil); err != nil {
t.Fatalf("ipv4.RawConn.WriteTo failed: %v", err)
}
rb := make([]byte, ipv4.HeaderLen+128)
if rh, b, cm, err := r.ReadFrom(rb); err != nil {
t.Fatalf("ipv4.RawConn.ReadFrom failed: %v", err)
} else {
t.Logf("rcvd cmsg: %v", cm)
m, err := icmp.ParseMessage(iana.ProtocolICMP, b)
if err != nil {
t.Fatalf("icmp.ParseMessage failed: %v", err)
}
switch {
case (rh.Dst.IsLoopback() || rh.Dst.IsLinkLocalUnicast() || rh.Dst.IsGlobalUnicast()) && m.Type == ipv4.ICMPTypeEchoReply && m.Code == 0: // net.inet.icmp.bmcastecho=1
case rh.Dst.IsMulticast() && m.Type == ipv4.ICMPTypeEcho && m.Code == 0: // net.inet.icmp.bmcastecho=0
default:
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
}
func ExampleIPOSPFListener() {
var ifs []*net.Interface
en0, err := net.InterfaceByName("en0")
if err != nil {
log.Fatal(err)
}
ifs = append(ifs, en0)
en1, err := net.InterfaceByIndex(911)
if err != nil {
log.Fatal(err)
}
ifs = append(ifs, en1)
c, err := net.ListenPacket("ip4:89", "0.0.0.0")
if err != nil {
log.Fatal(err)
}
defer c.Close()
r, err := ipv4.NewRawConn(c)
if err != nil {
log.Fatal(err)
}
for _, ifi := range ifs {
err := r.JoinGroup(ifi, &net.IPAddr{IP: AllSPFRouters})
if err != nil {
log.Fatal(err)
}
err = r.JoinGroup(ifi, &net.IPAddr{IP: AllDRouters})
if err != nil {
log.Fatal(err)
}
}
err = r.SetControlMessage(ipv4.FlagDst|ipv4.FlagInterface, true)
if err != nil {
log.Fatal(err)
}
r.SetTOS(ipv4.DSCP_CS6)
parseOSPFHeader := func(b []byte) *OSPFHeader {
if len(b) < OSPFHeaderLen {
return nil
}
return &OSPFHeader{
Version: b[0],
Type: b[1],
Len: uint16(b[2])<<8 | uint16(b[3]),
RouterID: uint32(b[4])<<24 | uint32(b[5])<<16 | uint32(b[6])<<8 | uint32(b[7]),
AreaID: uint32(b[8])<<24 | uint32(b[9])<<16 | uint32(b[10])<<8 | uint32(b[11]),
Checksum: uint16(b[12])<<8 | uint16(b[13]),
}
}
b := make([]byte, 1500)
for {
iph, p, _, err := r.ReadFrom(b)
if err != nil {
log.Fatal(err)
}
if iph.Version != ipv4.Version {
continue
}
if iph.Dst.IsMulticast() {
if !iph.Dst.Equal(AllSPFRouters) && !iph.Dst.Equal(AllDRouters) {
continue
}
}
ospfh := parseOSPFHeader(p)
if ospfh == nil {
continue
}
if ospfh.Version != OSPF_VERSION {
continue
}
switch ospfh.Type {
case OSPF_TYPE_HELLO:
case OSPF_TYPE_DB_DESCRIPTION:
case OSPF_TYPE_LS_REQUEST:
case OSPF_TYPE_LS_UPDATE:
case OSPF_TYPE_LS_ACK:
}
}
}
func TestRawConnReadWriteUnicastICMP(t *testing.T) {
switch runtime.GOOS {
case "plan9", "windows":
t.Skipf("not supported on %q", runtime.GOOS)
}
if os.Getuid() != 0 {
t.Skip("must be root")
}
ifi := nettest.RoutedInterface("ip4", net.FlagUp|net.FlagLoopback)
if ifi == nil {
t.Skipf("not available on %q", runtime.GOOS)
}
c, err := net.ListenPacket("ip4:icmp", "0.0.0.0")
if err != nil {
t.Fatalf("net.ListenPacket failed: %v", err)
}
defer c.Close()
dst, err := net.ResolveIPAddr("ip4", "127.0.0.1")
if err != nil {
t.Fatalf("ResolveIPAddr failed: %v", err)
}
r, err := ipv4.NewRawConn(c)
if err != nil {
t.Fatalf("ipv4.NewRawConn failed: %v", err)
}
defer r.Close()
cf := ipv4.FlagTTL | ipv4.FlagDst | ipv4.FlagInterface
for i, toggle := range []bool{true, false, true} {
wb, err := (&icmp.Message{
Type: ipv4.ICMPTypeEcho, Code: 0,
Body: &icmp.Echo{
ID: os.Getpid() & 0xffff, Seq: i + 1,
Data: []byte("HELLO-R-U-THERE"),
},
}).Marshal(nil)
if err != nil {
t.Fatalf("icmp.Message.Marshal failed: %v", err)
}
wh := &ipv4.Header{
Version: ipv4.Version,
Len: ipv4.HeaderLen,
TOS: i + 1,
TotalLen: ipv4.HeaderLen + len(wb),
TTL: i + 1,
Protocol: 1,
Dst: dst.IP,
}
if err := r.SetControlMessage(cf, toggle); err != nil {
t.Fatalf("ipv4.RawConn.SetControlMessage failed: %v", err)
}
if err := r.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
t.Fatalf("ipv4.RawConn.SetWriteDeadline failed: %v", err)
}
if err := r.WriteTo(wh, wb, nil); err != nil {
t.Fatalf("ipv4.RawConn.WriteTo failed: %v", err)
}
rb := make([]byte, ipv4.HeaderLen+128)
loop:
if err := r.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
t.Fatalf("ipv4.RawConn.SetReadDeadline failed: %v", err)
}
if _, b, cm, err := r.ReadFrom(rb); err != nil {
t.Fatalf("ipv4.RawConn.ReadFrom failed: %v", err)
} else {
t.Logf("rcvd cmsg: %v", cm)
m, err := icmp.ParseMessage(iana.ProtocolICMP, b)
if err != nil {
t.Fatalf("icmp.ParseMessage failed: %v", err)
}
if runtime.GOOS == "linux" && m.Type == ipv4.ICMPTypeEcho {
// On Linux we must handle own sent packets.
goto loop
}
if m.Type != ipv4.ICMPTypeEchoReply || m.Code != 0 {
t.Fatalf("got type=%v, code=%v; expected type=%v, code=%v", m.Type, m.Code, ipv4.ICMPTypeEchoReply, 0)
}
}
}
}