Protocol Packs

Core Pack (sdk-protocol-core)

Provides base infrastructure:

• Packet, Header, ProtocolStack

• Extension points

TCP/IP Pack (sdk-protocol-tcpip)

Layer 2

• Ethernet, VLAN (802.1Q), LLC/SNAP, STP, LLDP

Layer 3

• IPv4, IPv6, ARP, ICMPv4/v6, IPsec (AH/ESP)

Layer 4

• TCP (with options), UDP, SCTP

Layer 7

• DNS, HTTP/1.x, TLS record layer

Header Examples

IPv4

Ip4 ip = new Ip4();
if (packet.hasHeader(ip)) {
    System.out.println(ip.src() + " → " + ip.dst());
    System.out.println("TTL: " + ip.ttl());
    System.out.println("DF: " + ip.flagDf() + ", MF: " + ip.flagMf());
}

TCP

Tcp tcp = new Tcp();
if (packet.hasHeader(tcp)) {
    System.out.println(tcp.srcPort() + " → " + tcp.dstPort());
    System.out.println("SYN: " + tcp.flagSyn() + ", ACK: " + tcp.flagAck());
    if (tcp.hasOption(TcpOption.MSS)) {
        System.out.println("MSS: " + tcp.optionMss());
    }
}