Wireshark-dev: Re: [Wireshark-dev] How to get Destination IP in plugin
From: Guy Harris <[email protected]>
Date: Thu, 03 Jan 2008 10:45:20 -0800
Diaconou, Alex wrote:
I am developing a plugin for test purposes on our system, and I need to extract the destination IP address of the packets so I know how to parse the data on top of a TCP packet.
So is this a plugin dissector or a plugin tap?

If it's a dissector, then:

Is there an API or other method of obtaining the IP address for comparison?
yes - your dissector will be passed a packet_info pointer, which we'll 
call "pinfo", and:
	pinfo->src is an "address" structure with the packet's source address;

	pinfo->src is an "address" structure with the packet's destination address.

NOTE: it could be an IPv4 or IPv6 address. An "address" structure has a member named "type" which could be AT_IPv4 or AT_IPv6 for the source or destination address of an IP packet.
I should note that I’m developing in a windows environment in case that makes any difference.
It doesn't - the APIs for getting and processing packet data are 
platform-independent.