Interpret ICMP packets

SaTaN · 01-20-2004, 10:33 PM

Suppose I have captured an icmp packet using winpcap on windows in visual c++.

Now how do I find out the i.p addresses and other info related to that icmp packet ??

Code:

void packet_handler(u_char *param, const struct pcap_pkthdr *header, const u_char *pkt_data)

This is my packet handler function

chort · 01-20-2004, 11:23 PM

It will be in the packet header, but you need to know the syntax for the construction of an IP header. If you're going to be doing IP programming, I strongly suggest buying and reading TCP/IP Illustrated: Volume 1, by W. Richard Stevens. This book is considered the book for TCP/IP and it explains everything you need to know and more.