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wireshark-dev: Re: [Wireshark-dev] saving data in pcap file form

Re: [Wireshark-dev] saving data in pcap file format

From: Lange Jan-Erik <Jan-Erik.Lange_at_nospam>
Date: Mon Oct 11 2010 - 13:21:32 GMT
To: "gsslist+wireshark@anthropohedron.net" <gsslist+wireshark@anthropohedron.net>, Developer support list for Wireshark <wireshark-dev@wireshark.org>

Ok, in the documentation of winpcap I found the function pcap_dump_open().
It opens a file for another function ...loop() with captures packet and saves it in this file.

But I have to open the file and have to write my data in this file.. not captureing it with this loop() function. It is possible to insert my data into a struct and then save this structure into a .pcap file?

I need the "low-level" description of this file format. It should be possible to implement an own easy function to save the data.

________________________________________
Von: wireshark-dev-bounces@wireshark.org [wireshark-dev-bounces@wireshark.org] im Auftrag von Gregory Seidman [gsslist+wireshark@anthropohedron.net]
Gesendet: Montag, 11. Oktober 2010 13:53
An: wireshark-dev@wireshark.org
Betreff: Re: [Wireshark-dev] saving data in pcap file format

On Mon, Oct 11, 2010 at 01:35:17PM +0200, Lange Jan-Erik wrote:
> Hello,
>
> I want to analyze an usb datastream with wireshark. To record the data I use a proprietary development that uses libusb to receive the data.
>
> Ok, to analyze the data I want to use wireshark. Is there a way to save the recorded data as a *.pcap File? Is there a library I could use to write the data into a file? Can you an recommend overview about this file format?
>
> When I have this pcap file I would create a dissector plugin to dissect the data according to my protocoll.

You are looking for libpcap (or WinPcap on Windows). Works like a charm,
and has lots of language bindings (I've used it with Ruby).

> Best regards
> Jan
--Greg

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