Reading packet header with jpcap

Question

I'm trying to read packet headers using jpcap.

TCPPacket tcpPacket = (TCPPacket) captor.getPacket();
System.out.println(new String(tcpPacket.header));

and the output is (something like):

What am I missing? (When reading the data part, it looks OK)

Answer 1

The TCPPacket.getHeader() returns a byte[] array, which you can't expect to contain only nice ASCII values, so when you make a (UTF-8) String out of it, you get line noise...

AFAIK there is no structured approach to TCP headers in JPCap, so you'll have to dig out a reference and decode it yourself - or use Google to find resources by people who've done the work already.

Cheers,