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This IE is known to be sent by a Cisco GGSN, and was added in
ETSI TS 129 060 V7.17.0 (2011-10) /
3GPP TS 29.060 version 7.17.0 Release 7
See https://lists.osmocom.org/pipermail/osmocom-net-gprs/2016-September/000711.html
Subject "sgsnemu failing to create PDP context with Cisco GGSN"
Tue Sep 13 08:00:37 UTC 2016
Tweaked-by: Neels Hofmeyr <nhofmeyr@sysmocom.de>
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CC gtpie.lo
gtpie.c: In function 'gtpie_encaps':
gtpie.c:437:22: warning: variable 'm' set but not used [-Wunused-but-set-variable]
union gtpie_member *m;
^
gtpie.c: In function 'gtpie_encaps2':
gtpie.c:537:22: warning: variable 'm' set but not used [-Wunused-but-set-variable]
union gtpie_member *m;
^
lookup.c: In function ‘lookup’:
lookup.c:40:24: warning: typedef ‘ub1’ locally defined but not used [-Wunused-local-typedefs]
typedef unsigned char ub1; /* unsigned 1-byte quantities */
^
Still one compilation warning left in cmdline.c, but that code
is autogenerated.
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After so many years of silence, we don't expect the original author to
return to the project. To make things a bit simpler for us, we convert
the coding style to what we are used to (Linux style).
The conversion was made using the 'Lindent' script which is part of the
Linux kernel.
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fix ggsn handling of create pdp context when RAI is included and Recovery field is absent
Signed-off-by: Yann BONNAMY <yann_bonnamy@yahoo.fr>
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This adds support for the followng new GTP Information Elements:
RAT_TYPE, USER_LOC, MS_TZ, IMEI_SV
Furthermore, it allows to specify those fields as sgsnemu command line
arguments.
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Pointers are not always 4 bytes in size...
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Mostly signed/unsigned and typecasting issues
Taken from http://sourceforge.net/tracker/index.php?func=detail&aid=1811517&group_id=68956&atid=522957
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This is taken from http://sourceforge.net/tracker/index.php?func=detail&aid=1811511&group_id=68956&atid=522957 and http://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg402969.html and addresses a DoS:
The problem lies in the parsing of information elements in GTP messages, which
is implemented in the gtpie_decaps function of gtp/gtpie.c file.
The implementation has a bug that does not check if there are too many
information elements in the message thus causing the software to loop
infinitely in the while-loop.
In addition, handling routine for the error situation had to be implemented
outside the while-loop.
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