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netfilter: ip6_tables: add flags parameter to ipv6_find_hdr()

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This patch adds the flags parameter to ipv6_find_hdr. This flags
allows us to:

* know if this is a fragment.
* stop at the AH header, so the information contained in that header
  can be used for some specific packet handling.

This patch also adds the offset parameter for inspection of one
inner IPv6 header that is contained in error messages.

Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Hans Schillstrom 2012-04-23 03:35:26 +00:00 • committed by Pablo Neira Ayuso
commit 84018f55ab
8 changed files with 49 additions and 18 deletions
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7
include/linux/netfilter_ipv6/ip6_tables.h
View file

@ -298,9 +298,14 @@ ip6t_ext_hdr(u8 nexthdr)
(nexthdr == IPPROTO_DSTOPTS);
}
enum {
IP6T_FH_F_FRAG = (1 << 0),
IP6T_FH_F_AUTH = (1 << 1),
};
/* find specified header and get offset to it */
extern int ipv6_find_hdr(const struct sk_buff *skb, unsigned int *offset,
int target, unsigned short *fragoff);
int target, unsigned short *fragoff, int *fragflg);
#ifdef CONFIG_COMPAT
#include <net/compat.h>