func (p *Packet) ChangeOtherTunnelId(tunnelId uint64) {
p.OtherTunnelId = tunnelId
data := utils.Uint64ToBytes(tunnelId)
for i := OtherTunnelId_INDEX; i < OtherTunnelId_END; i++ {
p.RawData[p.Start+i] = data[i-OtherTunnelId_INDEX]
}
}
func (p *Packet) genHeader() []byte {
header := make([]byte, 96)
dataLenBytes := utils.Int16ToBytes(len(p.RawData) - 96)
copy(header[Length_INDEX:Length_END], dataLenBytes)
tunnelIdBytes := utils.Uint64ToBytes(p.TunnelId)
copy(header[TunnelId_INDEX:TunnelId_END], tunnelIdBytes)
sessionIdBytes := utils.Uint32ToBytes(p.SessionId)
copy(header[SessionId_INDEX:SessionId_END], sessionIdBytes)
packetIdBytes := utils.Uint32ToBytes(p.Id)
copy(header[Id_INDEX:Id_END], packetIdBytes)
// 传输层协议类型
header[ProtoType_INDEX] = p.ProtoType
// 包类型
header[PacketType_INDEX] = p.PacketType
// other 长度
header[OtherLen_INDEX] = byte(p.OtherLen)
count := OtherLen_INDEX + 1
if p.OtherLen != 0 && p.OtherLen == len(p.Dst) {
dstBytes := []byte(p.Dst)
copy(header[OtherLen_INDEX+1:OtherLen_INDEX+1+p.OtherLen], dstBytes)
count += len(dstBytes)
} else {
//p.LOG.Println("error udppacket genHeader OtherLen not match len(Dst)")
header[OtherLen_INDEX] = byte(0)
}
return header[:count]
}