proto

Lean, mean protocol decoding and encoding.

Usage

package main
import (
"log""github.com/PreetamJinka/proto"
)
funcmain() {
b:= []byte{
0, 15, 248, 20, 48, 0, 0, 37, 144, 82, 230, 31,
134, 221, 96, 0, 0, 0, 0, 40, 6, 64, 38, 32, 1,
0, 80, 7, 0, 6, 0, 0, 0, 0, 0, 1, 0, 3, 38, 32,
1, 0, 80, 7, 0, 2, 0, 0, 0, 0, 0, 0, 0, 2, 217,
104, 0, 80, 184, 89, 70, 22, 0, 0, 0, 0, 160, 2,
22, 128, 239, 131, 0, 0, 2, 4, 5, 160, 4, 2, 8,
10, 184, 73, 195, 65, 0, 0, 0, 0, 1, 3, 3, 7,
}
ethernetFrame, err:=proto.DecodeEthernet(b)
iferr!=nil {
log.Fatal(err)
}
ifethernetFrame.EtherType!=0x86dd {
log.Fatalf("expected to see EtherType %x, got %x", 0x86dd, ethernetFrame.EtherType)
}
ipv6Packet, err:=proto.DecodeIPv6(ethernetFrame.Payload)
iferr!=nil {
log.Fatal(err)
}
log.Printf("Decoded an IPv6 packet: %#+v", ipv6Packet)
ifipv6Packet.NextHeader!=0x6 {
log.Fatalf("expected to see NextHeader %x, got %x", 0x6, ipv6Packet.NextHeader)
}
tcpPacket, err:=proto.DecodeTCP(ipv6Packet.Payload)
iferr!=nil {
log.Fatal(err)
}
log.Printf("Decoded a TCP packet: %#+v", tcpPacket)
}

Notes

Payloads are sub-sliced, not copied, so you might want to make copies if you're reusing buffers that you're decoding.

TCP and UDP encoding is not implemented.

License

BSD (see LICENSE)