https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5616
Summary: Patch to add export info on malformed GapAcks in SCTP
SACKs and NR-SACKs
Product: Wireshark
Version: SVN
Platform: All
OS/Version: All
Status: NEW
Severity: Normal
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: dreibh@xxxxxxxxxxxxxx
Created an attachment (id=5779)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=5779)
The patch
Build Information:
wireshark 1.5.0+svn35612 (SVN Rev 35634 from /trunk)
Copyright 1998-2011 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Compiled (64-bit) with GTK+ 2.22.0, with GLib 2.26.0, with libpcap 1.1.1, with
libz 1.2.3.4, without POSIX capabilities, without libpcre, with SMI 0.4.8, with
c-ares 1.7.3, without Lua, without Python, with GnuTLS 2.8.6, with Gcrypt
1.4.5,
with MIT Kerberos, with GeoIP, without PortAudio, without AirPcap.
Running on Linux 2.6.37dreibholz, with libpcap version 1.1.1, with libz
1.2.3.4,
GnuTLS 2.8.6, Gcrypt 1.4.5.
Built using gcc 4.4.5.
--
The attached patch adds checks for malformed GapAcks in SCTP SACKs and NR-SACKs
to the SCTP dissector. An expert info with error information is generated if:
- (R/NR)-GapAck start <= CumAck + 1 or
- (R/NR)-GapAck start <= (R/NR)-GapAck end + 1 of previous (R/NR)-GapAck entry
or
- (R/NR)-GapAck start > (R/NR)-GapAck end.
This information is highly useful for debugging SACK and NR-SACK handling in
SCTP implementations.
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