Wireshark-dev: Re: [Wireshark-dev] request help for packet capture using libpcap
From: Guy Harris <[email protected]>
Date: Tue, 06 May 2008 09:07:44 -0700
[email protected] wrote:

So I was wondering whether the programm is actually capturing any network packet.
If your program prints "Welcome ...", it's capturing packets.  It will 
print "Welcome ..." for each packet it captures.
However, it's not saving those packets to the capture file that you've 
created with pcap_dump_open().  Your callback needs to write the packets 
out by calling pcap_dump().