topic Creating a packet in Software Defined Networking

Creating a packet

HansChristian — Tue, 12 Apr 2016 20:58:21 GMT

Hello,

I'm able to create a packet like this:

Ethernet etherh = new Ethernet.Builder().srcAddr(smac).dstAddr(dmac).type(EthernetType.IPv4).build();
Ip iph = new Ip.Builder().srcAddr(sip).dstAddr(dip).type(IpType.TCP).build();
Tcp tcph = new Tcp.Builder().dstPort(dport).srcPort(sport).build();
Packet pkt = new Packet(etherh, iph, tcph);

But how can I add tcp data?

Could anybody please help

Re: Creating a packet

ShaunWackerly — Mon, 16 May 2016 19:26:15 GMT

To add TCP data, you'd likely need to specify the data as an inner "Protocol".

To specify the data as an inner protocol, you'd build a com.hp.util.pkt.UnknownProtocol, using UnknownProtocol.Builder and specifying the raw bytes you want to add in the bytes() method. Then you'd pass that UnknownProtocol to the Packet constructor just after the 'tcph' parameter.