func newIcmpData(src, dest *net.IPAddr, typeCode, offSet, ttl int) (data []byte) {
ip := &layers.IPv4{}
ip.Version = 4
ip.Protocol = layers.IPProtocolICMPv4
ip.SrcIP = src.IP
ip.DstIP = dest.IP
ip.Length = 20
ip.TTL = uint8(ttl)
icmp := &layers.ICMPv4{}
icmp.TypeCode = layers.ICMPv4TypeCode(uint16(typeCode) << 8)
icmp.Id = pid
icmp.Seq = 1
icmp.Checksum = 0
opts := gopacket.SerializeOptions{}
opts.ComputeChecksums = true
opts.FixLengths = true
now := time.Now().UnixNano()
var payload = make([]byte, 8)
binary.LittleEndian.PutUint64(payload, uint64(now))
buf := gopacket.NewSerializeBuffer()
gopacket.SerializeLayers(buf, opts, ip, icmp, gopacket.Payload(payload))
return buf.Bytes()
}
func (self oxmBasic) SetField(data *Frame, key OxmKey, payload OxmPayload) error {
m := payload.(OxmValueMask)
switch uint32(key.(OxmKeyBasic)) {
default:
return fmt.Errorf("unknown oxm field")
case oxm.OXM_OF_IN_PORT:
data.inPort = binary.BigEndian.Uint32(m.Value)
return nil
case oxm.OXM_OF_IN_PHY_PORT:
data.inPhyPort = binary.BigEndian.Uint32(m.Value)
return nil
case oxm.OXM_OF_METADATA:
data.metadata = binary.BigEndian.Uint64(m.Value)
return nil
case oxm.OXM_OF_ETH_DST:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.Ethernet); ok {
t.DstMAC = net.HardwareAddr(m.Value)
return nil
}
}
case oxm.OXM_OF_ETH_SRC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.Ethernet); ok {
t.SrcMAC = net.HardwareAddr(m.Value)
return nil
}
}
case oxm.OXM_OF_ETH_TYPE:
var lastLayer gopacket.Layer
for _, layer := range data.Layers() {
switch t := layer.(type) {
case *layers.Ethernet:
lastLayer = t
case *layers.Dot1Q:
lastLayer = t
}
}
if t, ok := lastLayer.(*layers.Ethernet); ok {
t.EthernetType = layers.EthernetType(binary.BigEndian.Uint16(m.Value))
return nil
}
if t, ok := lastLayer.(*layers.Dot1Q); ok {
t.Type = layers.EthernetType(binary.BigEndian.Uint16(m.Value))
return nil
}
case oxm.OXM_OF_VLAN_VID:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.Dot1Q); ok {
t.VLANIdentifier = binary.BigEndian.Uint16(m.Value) & 0x0fff
return nil
}
}
case oxm.OXM_OF_VLAN_PCP:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.Dot1Q); ok {
t.Priority = m.Value[0]
return nil
}
}
case oxm.OXM_OF_IP_DSCP:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv4); ok {
t.TOS = t.TOS&0x03 | m.Value[0]<<2
return nil
}
if t, ok := layer.(*layers.IPv6); ok {
t.TrafficClass = t.TrafficClass&0x03 | m.Value[0]<<2
return nil
}
}
case oxm.OXM_OF_IP_ECN:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv4); ok {
t.TOS = t.TOS&0xFC | m.Value[0]&0x03
return nil
}
if t, ok := layer.(*layers.IPv6); ok {
t.TrafficClass = t.TrafficClass&0xFC | m.Value[0]&0x03
return nil
}
}
case oxm.OXM_OF_IP_PROTO:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv4); ok {
t.Protocol = layers.IPProtocol(m.Value[0])
return nil
}
if t, ok := layer.(*layers.IPv6); ok {
t.NextHeader = layers.IPProtocol(m.Value[0])
return nil
}
}
case oxm.OXM_OF_IPV4_SRC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv4); ok {
t.SrcIP = net.IP(m.Value)
return nil
}
}
case oxm.OXM_OF_IPV4_DST:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv4); ok {
t.DstIP = net.IP(m.Value)
return nil
}
}
case oxm.OXM_OF_TCP_SRC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.TCP); ok {
t.SrcPort = layers.TCPPort(binary.BigEndian.Uint16(m.Value))
return nil
}
}
case oxm.OXM_OF_TCP_DST:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.TCP); ok {
t.DstPort = layers.TCPPort(binary.BigEndian.Uint16(m.Value))
return nil
}
}
case oxm.OXM_OF_UDP_SRC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.UDP); ok {
t.SrcPort = layers.UDPPort(binary.BigEndian.Uint16(m.Value))
return nil
}
}
case oxm.OXM_OF_UDP_DST:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.UDP); ok {
t.DstPort = layers.UDPPort(binary.BigEndian.Uint16(m.Value))
return nil
}
}
case oxm.OXM_OF_SCTP_SRC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.SCTP); ok {
t.SrcPort = layers.SCTPPort(binary.BigEndian.Uint16(m.Value))
return nil
}
}
case oxm.OXM_OF_SCTP_DST:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.SCTP); ok {
t.DstPort = layers.SCTPPort(binary.BigEndian.Uint16(m.Value))
return nil
}
}
case oxm.OXM_OF_ICMPV4_TYPE:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv4); ok {
t.TypeCode = layers.ICMPv4TypeCode(uint16(t.TypeCode)&0x00FF | uint16(m.Value[0])<<8)
return nil
}
}
case oxm.OXM_OF_ICMPV4_CODE:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv4); ok {
t.TypeCode = layers.ICMPv4TypeCode(uint16(t.TypeCode)&0xFF00 | uint16(m.Value[0]))
return nil
}
}
case oxm.OXM_OF_ARP_OP:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ARP); ok {
t.Operation = binary.BigEndian.Uint16(m.Value)
return nil
}
}
case oxm.OXM_OF_ARP_SPA:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ARP); ok {
t.SourceProtAddress = m.Value
return nil
}
}
case oxm.OXM_OF_ARP_TPA:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ARP); ok {
t.DstProtAddress = m.Value
return nil
}
}
case oxm.OXM_OF_ARP_SHA:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ARP); ok {
t.SourceHwAddress = m.Value
return nil
}
}
case oxm.OXM_OF_ARP_THA:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ARP); ok {
t.DstHwAddress = m.Value
return nil
}
}
case oxm.OXM_OF_IPV6_SRC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv6); ok {
t.SrcIP = net.IP(m.Value)
return nil
}
}
case oxm.OXM_OF_IPV6_DST:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv6); ok {
t.DstIP = net.IP(m.Value)
return nil
}
}
case oxm.OXM_OF_IPV6_FLABEL:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.IPv6); ok {
t.FlowLabel = binary.BigEndian.Uint32(m.Value)
return nil
}
}
case oxm.OXM_OF_ICMPV6_TYPE:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv6); ok {
t.TypeCode = layers.ICMPv6TypeCode(uint16(t.TypeCode)&0x00FF | uint16(m.Value[0])<<8)
return nil
}
}
case oxm.OXM_OF_ICMPV6_CODE:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv6); ok {
t.TypeCode = layers.ICMPv6TypeCode(uint16(t.TypeCode)&0xFF00 | uint16(m.Value[0]))
return nil
}
}
case oxm.OXM_OF_IPV6_ND_TARGET:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv6); ok {
typ := uint8(t.TypeCode >> 8)
if typ == layers.ICMPv6TypeNeighborSolicitation || typ == layers.ICMPv6TypeNeighborAdvertisement {
copy(t.Payload[:16], m.Value)
return nil
}
}
}
case oxm.OXM_OF_IPV6_ND_SLL:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv6); ok {
typ := uint8(t.TypeCode >> 8)
if typ == layers.ICMPv6TypeNeighborSolicitation {
for cur := 16; cur < len(t.Payload); {
length := int(t.Payload[cur+1]) * 8
if t.Payload[cur] == 1 { // source link-layer address (RFC 2461 4.6)
copy(t.Payload[cur+2:], m.Value)
return nil
}
cur += length
}
buf := make([]byte, 8)
buf[0] = 2
buf[1] = 1
copy(buf[2:], m.Value)
t.Payload = append(t.Payload, buf...)
return nil
}
}
}
case oxm.OXM_OF_IPV6_ND_TLL:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.ICMPv6); ok {
typ := uint8(t.TypeCode >> 8)
if typ == layers.ICMPv6TypeNeighborAdvertisement {
for cur := 16; cur < len(t.Payload); {
length := int(t.Payload[cur+1]) * 8
if t.Payload[cur] == 2 { // target link-layer address (RFC 2461 4.6)
copy(t.Payload[cur+2:], m.Value)
return nil
}
cur += length
}
buf := make([]byte, 8)
buf[0] = 2
buf[1] = 1
copy(buf[2:], m.Value)
t.Payload = append(t.Payload, buf...)
return nil
}
}
}
case oxm.OXM_OF_MPLS_LABEL:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.MPLS); ok {
t.Label = binary.BigEndian.Uint32(m.Value)
return nil
}
}
case oxm.OXM_OF_MPLS_TC:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.MPLS); ok {
t.TrafficClass = m.Value[0]
return nil
}
}
case oxm.OXM_OF_MPLS_BOS:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers.MPLS); ok {
if m.Value[0] == 0 {
t.StackBottom = false
} else {
t.StackBottom = true
}
return nil
}
}
case oxm.OXM_OF_PBB_ISID:
for _, layer := range data.Layers() {
if t, ok := layer.(*layers2.PBB); ok {
t.ServiceIdentifier = binary.BigEndian.Uint32(append(make([]byte, 1), m.Value...))
return nil
}
}
case oxm.OXM_OF_TUNNEL_ID:
data.tunnelId = binary.BigEndian.Uint64(m.Value)
return nil
case oxm.OXM_OF_IPV6_EXTHDR:
return fmt.Errorf("OXM_OF_IPV6_EXTHDR setter is unsupported")
}
return fmt.Errorf("layer not found: %v", m)
}