https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7759
Summary: When NIC calculates IPv4 header checksum, the packet
is marked bad
Product: Wireshark
Version: 1.8.2
Platform: x86
OS/Version: Windows XP
Status: NEW
Severity: Minor
Priority: Low
Component: Wireshark
AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
ReportedBy: meckschlager@xxxxxxxxxxxx
Build Information:
Version 1.8.2
Copyright 1998-2012 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 (32-bit) with GTK+ 2.24.10, with Cairo 1.10.2, with Pango 1.30.0, with
GLib 2.32.2, with WinPcap (4_1_2), with libz 1.2.5, without POSIX capabilities,
with SMI 0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS
2.12.18, with Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with PortAudio
V19-devel (built Sep 10 2012), with AirPcap.
Running on Windows XP Service Pack 3, build 2600, with WinPcap version 4.1.2
(packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch 1_0_rel0b
(20091008), GnuTLS 2.12.18, Gcrypt 1.4.6, without AirPcap, from the
PortableApps U3 device in drive C:.
Built using Microsoft Visual C++ 9.0 build 30729
--
All Packets that get sent via my NIC Intel 82567 have IP checksum 0 because the
card itself calculates the header checksum.
Now wireshark marks all those packets bad, because of the "bad" checksum.
I've written a little patch that I'll attach.
Cheers
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