target/linux/generic/patches-2.6.37/606-netfilter_dscp_ipv6_mangle.patch

   1 From: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
   2 Date: Tue, 10 May 2011 08:00:21 +0000 (+0200)
   3 Subject: netfilter: IPv6: fix DSCP mangle code
   4 X-Git-Tag: v2.6.39~15^2~13^2~1
   5 X-Git-Url: http://git390.marist.edu/cgi-bin/gitweb.cgi?p=linux-2.6.git;a=commitdiff_plain;h=1ed2f73d90fb49bcf5704aee7e9084adb882bfc5
   6
   7 netfilter: IPv6: fix DSCP mangle code
   8
   9 The mask indicates the bits one wants to zero out, so it needs to be
  10 inverted before applying to the original TOS field.
  11
  12 Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp>
  13 Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
  14 ---
  15
  16 --- a/net/netfilter/xt_DSCP.c
  17 +++ b/net/netfilter/xt_DSCP.c
  18 @@ -99,7 +99,7 @@ tos_tg6(struct sk_buff *skb, const struc
  19         u_int8_t orig, nv;
  20
  21         orig = ipv6_get_dsfield(iph);
  22 -       nv   = (orig & info->tos_mask) ^ info->tos_value;
  23 +       nv   = (orig & ~info->tos_mask) ^ info->tos_value;
  24
  25         if (orig != nv) {
  26                 if (!skb_make_writable(skb, sizeof(struct iphdr)))