in particular I am opening a voip pcap file. And then aim is to dump all SIP, SDP and RTP packets that are from the same call into one file

This is a question rather than an answer... Out of curiosity, what are you trying to do that some freeware app like WireShark cannot do? From what I understand, you can open a pcap file and WireShark can actually play the audio of one of the calls. Just curious. Maybe controlling what Wireshark can already do might be a ticket?

In reply to Re: dumping hashes to pcap files by Marshall
in thread dumping hashes to pcap files by bigmoose

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