Hello all,
Hope every one is fine and having fun with SIP applications.cool...
Iam in to VOIP Product testing.Manually testing the sip
functionlaites,Audio,Netwok etc.
I dont have any idea of using SIPp scripts in tsting SIP application. I need
basic idea of using the SIPp scriptsz.
Suppose if I want to test the SIP application where should i start & howcan i
make use of SIPp in testing VOIP product.
Please your comments and suggestiongs are very much helpful in building my
career.
Thanks in advance.
Best Regards,
chandan.
From: david.resn...@comverse.com
To: sipp-users@lists.sourceforge.net
Date: Mon, 3 May 2010 08:31:03 -0700
Subject: [Sipp-users] Problem preparing files for pcap_play
I’ve been trying to prepare files for other codecs to use with pcap_play and am
having difficulties.
I save a file (for example, PCMU) using this command inside the sipp script:
<nop>
<action>
<exec command="/usr/sbin/tcpdump -T rtp -i any -s 0 -w
[logdir]/tcpdump.pcap dst port 49120" />
</action>
</nop>
A file is produced, but doesn’t play back nicely. I note that when I examine
the provided g711a.pcap file with wireshark, it shows packets as UDP
1 0.000000 10.1.3.143 10.1.6.18
294 UDP Source port: commplex-main Destination port: raid-cd
If I ask wireshark to decode the reference g711a.pcap file as RTP, it looks
good:
1 0.000000 10.1.3.143 10.1.6.18
294 RTP PT=ITU-T G.711 PCMA, SSRC=0xDEE0EE8F, Seq=59133,
Time=240, Mark
The dump I make of mulaw it looks like this in wireshark. 214 bytes size
instead of 294. There is an entry every 20 millseconds, so it is the RTP.
2 0.225408 ff.fe.fe ff.7d.fe 214 FC
Unknown frame
If I ask wireshark to decode as UDP, it remains the same (as in it can’t decode
as UDP usefully).
Any thoughts on what I’m doing wrong? tcpdump options wrong perhaps?
Thanks!
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