From: Flavio Leitner <fbl@redhat.com>
Date: Mon, 24 Oct 2011 06:56:38 +0000 (-0400)
Subject: route: fix ICMP redirect validation
X-Git-Tag: v3.2-rc1~182^2~10^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7cc9150ebe8ec06cafea9f1c10d92ddacf88d8ae;p=pandora-kernel.git

route: fix ICMP redirect validation

The commit f39925dbde7788cfb96419c0f092b086aa325c0f
(ipv4: Cache learned redirect information in inetpeer.)
removed some ICMP packet validations which are required by
RFC 1122, section 3.2.2.2:
...
  A Redirect message SHOULD be silently discarded if the new
  gateway address it specifies is not on the same connected
  (sub-) net through which the Redirect arrived [INTRO:2,
  Appendix A], or if the source of the Redirect is not the
  current first-hop gateway for the specified destination (see
  Section 3.3.1).

Signed-off-by: Flavio Leitner <fbl@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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