osmocom-bb[master]: mobile/gsm48_rr.c: fix ACCH System Information parsing

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Vasil Velichkov gerrit-no-reply at lists.osmocom.org
Wed Jan 3 03:09:25 UTC 2018


Patch Set 3:

Hi Vadim, Harald,

>From captures taken from live networks it seems that SI5, SI5ter, SI5bis and SI6 messages actually do contain an L2 pseudo header.

Here is one pcap from the redmine 
https://osmocom.org/attachments/download/2191/layer23-lapdm-gsmtap.pcap

Here is a bug reported in Wireshark https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=14105

And it is stated in "3GPP TS 04.08 version 7.21.0 Release 1998"   

http://www.etsi.org/deliver/etsi_ts/100900_100999/100940/07.21.00_60/ts_100940v072100p.pdf

  9.1.37 System information type 5
  ...
  This message has a L2 Pseudo Length of 18.

  9.1.40 System information type 6
  ...
  This message has a L2 Pseudo Length of 11.

Thanks for looking into this.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I9166996f146af7973bf02a8a1c965581dc58a4a5
Gerrit-PatchSet: 3
Gerrit-Project: osmocom-bb
Gerrit-Branch: master
Gerrit-Owner: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Harald Welte <laforge at gnumonks.org>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: Max <msuraev at sysmocom.de>
Gerrit-Reviewer: Vadim Yanitskiy <axilirator at gmail.com>
Gerrit-Reviewer: Vasil Velichkov <vvvelichkov at gmail.com>
Gerrit-HasComments: No



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