https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3128
Summary: SMPP optional parameter 'network_error_code' incorrectly
decoded
Product: Wireshark
Version: 1.0.5
Platform: PC
OS/Version: Linux (other)
Status: NEW
Severity: Normal
Priority: Medium
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: rwgroenenberg@xxxxxxxxx
Build Information:
(Problem is still in v1.0.5 sources and applies to all platforms/OSes)
Version 0.99.6.1
Copyright 1998-2007 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 with GTK+ 2.12.12, with GLib 2.16.6, with libpcap 0.9.8, with libz
1.2.3, without libpcre, with Net-SNMP 5.4.1, without ADNS, without Lua, without
GnuTLS, without Gcrypt, with MIT Kerberos, without PortAudio, without AirPcap.
NOTE: this build doesn't support the "matches" operator for Wireshark filter
syntax.
Running on Linux 2.6.27.5-37.fc9.i686, with libpcap version 0.9.8.
Built using gcc 4.3.0 20080428 (Red Hat 4.3.0-8).
--
The SMPP optional parameter 'network_error_code' is decoded incorrectly. This
field is present in SMPP (v3.4 and higher) deliver_sm messages containing a
delivery notification.
This TLV contains 3 bytes of data, which is decoded in two steps, each
adjusting the offset in the message. After that the offset is increased
*again*, causing the next TLVs to not recognised:
wireshark-1.0.5/epan/dissectors/packet-smpp.c line 1201:
case 0x0423: /* network_error_code */
smpp_handle_int1(sub_tree, tvb,
hf_smpp_network_error_type, offset);
smpp_handle_int2(sub_tree, tvb,
hf_smpp_network_error_code, offset);
---> (*offset) += length;
break;
Removing the indicated increase in offset fixes the problem.
--
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