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List: netbsd-bugs
Subject: PR/53479 CVS commit: src/sys/net/npf
From: "Maxime Villard" <maxv () netbsd ! org>
Date: 2018-08-31 14:20:01
Message-ID: 20180831142001.46D2B7A1F7 () mollari ! NetBSD ! org
[Download RAW message or body]
The following reply was made to PR kern/53479; it has been noted by GNATS.
From: "Maxime Villard" <maxv@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc:
Subject: PR/53479 CVS commit: src/sys/net/npf
Date: Fri, 31 Aug 2018 14:16:07 +0000
Module Name: src
Committed By: maxv
Date: Fri Aug 31 14:16:07 UTC 2018
Modified Files:
src/sys/net/npf: npf_ext_normalize.c npf_impl.h npf_inet.c
Log Message:
Introduce npf_set_mss(). When the MSS is not 16bit-aligned, it sets:
0 8 16 24 32
+------+-----------+-----------+------+
| data | MSS (low) | MSS (hig) | data |
+------+-----------+-----------+------+
^ ^
old[0] old[1]
And sets new[0,1] accordingly with the new value. The MSS-clamping code
then adjusts twice the checksum on a 16bit boundary:
from old[0] to new[0]
from old[1] to new[1]
Fixes PR/53479, opened by myself. Tested with wireshark and kASan.
To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/sys/net/npf/npf_ext_normalize.c
cvs rdiff -u -r1.70 -r1.71 src/sys/net/npf/npf_impl.h
cvs rdiff -u -r1.50 -r1.51 src/sys/net/npf/npf_inet.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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