Extracting files from pcap on linux

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Hi,

I'm having major trouble finding a way to extract the files from a pcap, mainly the wav file(s). I only have yum at my disposal to install packages, and the internet hasn't come up with anything useful. Does anyone know of a way to do this?

What I have tried:

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Posted 3-Apr-18 3:34am

User 13204940

Updated 3-Apr-18 3:35am

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Dave Kreskowiak 3-Apr-18 10:27am

Lifting files from a packet capture? Care to describe the reason you're doing this?

[no name] 3-Apr-18 10:32am

I work for a Telecoms company and need to extract the audio from our calls which work over SIP

[no name] 4-Apr-18 4:15am

Is that a sufficient reason to deserve help?

Dave Kreskowiak 4-Apr-18 8:08am

I'm sorry, I didn't know I was supposed to abandon my job, family, and sleep just to sit around here and wait for you to reply.

Now, the problem is what you're describing is a "man in the middle attack". Do I trust you and tell you how to do this in a public forum, where either you or someone else comes by it, uses it for malicious purposes? Do I open myself up to liability?

I don't think so.

[no name] 4-Apr-18 9:13am

You're the skeptical type, I see. Here's a photo of my desk: https://imgur.com/cyv64Go. Feel free to look up the company or call our support number and I can talk to you directly if you wish.

Dave Kreskowiak 4-Apr-18 9:46am

I don't really care where you work. You're asking for information that is EASILY exploitable for nefarious purposes. I'm not opening myself up to that kind of liability.

[no name] 4-Apr-18 9:49am

What's with the hostile attitude? You're breaking the rules. I'm writing a SIP tracing tool, so we can diagnose call quality issues. Not all customers have their calls recorded, so I need to extract the wav files from the pcaps we have to be able to match up the SIP signalling with where issues occur.

But if you're not willing to help become of some obscure potential use which you now know from my image that I'm not going to do, you might as well follow rule 4;

4. Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Dave Kreskowiak 4-Apr-18 9:53am

You really think this conversation is entirely between us only? Ever hear of Google, or any other search engine? This is a PUBLIC FORUM where anyone and their mother can just walk by and pick up everything that's been said and use it for their own purposes.

Like I said, what you're describing is classic "man in the middle attack".

[no name] 4-Apr-18 9:54am

What I'm describing is also the way to diagnose call quality issues. We can chat in private if you'd like, that's the best way to stop eavesdropping

pardon the pun

[no name] 5-Apr-18 4:56am

Managed to do it with tshark and sox

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