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WiresharkIntegration » History » Revision 3

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laforge, 02/19/2016 10:49 PM
add link to wireshark bugzilla requesting gsmtap merge


= Wireshark integration =

[http://www.wireshark.org/ wireshark] is a popular Open Source protocol analyzer. Among many
other protocols, it includes dissectors for the GSM Layer 2 (LAPDm) and 3 (04.08).

There also is a GSMTAP protocol dissector (not in wireshark mainline yet submitted as [https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=4508 wireshark bug 4508], available in our
git repository in {{{src/wireshark/gsmtap.patch}}}), which allows real-time capture and
decode of GSM protocol messages encapsulated in GSMTAP (which is in turn encapsulated
in UDP and IP).

So if you have a wireshark version with GSMTAP support, you can have realtime decode and
trace of GSM protocol messages.

The OsmocomBB [wiki:layer23] program sends GSMTAP packets to the localhost (127.0.0.1) address
of the loopback interface (lo).

Screenshot

Image(gsmtap-wireshark.png, 66%)

Files (4)
gsmtap-arfcn25-cccb.pcap gsmtap-arfcn25-cccb.pcap 31.7 KB pcap file with GSMTAP data of BCCH received on ARFCN 25 in Berlin Marienstr. 11 laforge, 02/19/2010 10:23 PM
gsmtap-wireshark.png View gsmtap-wireshark.png 122 KB screenshot of wireshark with gsmtap capture laforge, 02/19/2010 10:29 PM
wireshark-layer23-lapdm.png View wireshark-layer23-lapdm.png 148 KB screenshot of wireshark protocol decode of LAPDm LOC UPD REQ laforge, 03/04/2010 02:54 PM
layer23-lapdm-gsmtap.pcap layer23-lapdm-gsmtap.pcap 4.76 KB pcap file generated by layer23 showing BCCH/CCCH info, IMM ASS, LOC UPD REQ and LOC UPD REJ laforge, 03/04/2010 08:55 PM

Updated by laforge about 8 years ago · 3 revisions

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