https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5170
Summary: Wireshark displays reassembled-packet without the data
of last fragment packet
Product: Wireshark
Version: unspecified
Platform: Other
OS/Version: Windows XP
Status: NEW
Severity: Minor
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: raghutrs@xxxxxxxxx
Build Information:
Copyright 1998-2008 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+ 2.12.8, with GLib 2.14.6, with WinPcap (version unknown),
with libz 1.2.3, without POSIX capabilities, with libpcre 7.0, with SMI 0.4.5,
with ADNS, with Lua 5.1, with GnuTLS 1.6.1, with Gcrypt 1.2.3, with MIT
Kerberos, with PortAudio V19-devel, with AirPcap.
Running on Windows XP Service Pack 2, build 2600, with WinPcap version 4.1.1
(packet.dll version 4.1.0.1753), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), without AirPcap.
Built using Microsoft Visual C++ 8.0 build 50727
Wireshark is Open Source Software released under the GNU General Public
License.
Check the man page and http://www.wireshark.org for more information.
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The problem occurs in following conditions.
-data size of last fragment packet < data size of pre-last fragment packet &&
-pre-last fragment packet is retransmitted
The following condition will fail for the retransmitted pre-last fragment
if the size of the last fragment < size of the pre-last fragment
"fd_i->len + dfpos <= size" where
fd_i->len : is the size of current fragment,
dfpos : is the number of bytes copied until now,
size : is the total number of bytes.
Since the condition fails, the last fragment is not reassembled.
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