netdev - [PATCH v5 3/7] tcp: harmonize tcp_vx

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 15 Feb 2010 07:28:44 -0500
From:	William Allen Simpson <william.allen.simpson@...il.com>
To:	Linux Kernel Developers <linux-kernel@...r.kernel.org>
CC:	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Miller <davem@...emloft.net>,
	Andi Kleen <andi@...stfloor.org>
Subject: [PATCH v5 3/7] tcp: harmonize tcp_vx_rcv header length assumptions

Harmonize tcp_v4_rcv() and tcp_v6_rcv() -- better document tcp doff
and header length assumptions, and carefully compare implementations.

Reduces multiply/shifts, marginally improving speed.

Removes redundant tcp header length checks before checksumming.

Instead, assumes (and documents) that any backlog processing and
transform policies will carefully preserve the header, and will
ensure the socket buffer length remains >= the header size.

Stand-alone patch, originally developed for TCPCT.

Signed-off-by: William.Allen.Simpson@...il.com
CC: Andi Kleen <andi@...stfloor.org>
---
  include/net/xfrm.h  |    7 ++++++
  net/ipv4/tcp_ipv4.c |   45 +++++++++++++++++++++-----------------
  net/ipv6/tcp_ipv6.c |   59 ++++++++++++++++++++++++++++----------------------
  3 files changed, 65 insertions(+), 46 deletions(-)

View attachment "len_th+2c5+2.6.33-rc8.patch" of type "text/plain" (8037 bytes)