netdev - [net-next-2.6 PATCH v6 2/7 RFC] TCPCT part 1b: generate Responder Cookie

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Message-ID: <4AFCDDC4.1090606@gmail.com>
Date:	Thu, 12 Nov 2009 23:17:08 -0500
From:	William Allen Simpson <william.allen.simpson@...il.com>
To:	Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: [net-next-2.6 PATCH v6 2/7 RFC] TCPCT part 1b: generate Responder
 Cookie

Define (missing) hash message size for SHA1.

Define hashing size constants specific to TCP cookies, and add new function.

Maintain global secret values for tcp_cookie_generator().

This is a significantly revised implementation of earlier (15-year-old)
Photuris [RFC-2522] code for the KA9Q cooperative multitasking platform.

Linux RCU technique appears to be well-suited to this application, though
neither of the circular queue items are freed.

These functions will also be used in subsequent patches that implement
additional features.

Signed-off-by: William.Allen.Simpson@...il.com
---
  include/linux/cryptohash.h |    1 +
  include/net/tcp.h          |    8 +++
  net/ipv4/tcp.c             |  146 ++++++++++++++++++++++++++++++++++++++++++++
  3 files changed, 155 insertions(+), 0 deletions(-)

View attachment "TCPCT+1b6.patch" of type "text/plain" (6996 bytes)