diff options
| author | Yasuyuki Kozakai <yasuyuki@netfilter.org> | 2007-07-07 22:14:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2007-07-10 22:16:55 -0700 |
| commit | 7bfe24611671ec76b44281e582b38535e21f01a9 (patch) | |
| tree | 72b04c7220842c58b0f0da274eac78896a28d142 | |
| parent | 558585aad0c0ef83d3d14a1c7576b1e404ca1fbc (diff) | |
[NETFILTER]: ip6_tables: fix explanation of valid upper protocol number
This explains the allowed upper protocol numbers. IP6T_F_NOPROTO was
introduced to use 0 as Hop-by-Hop option header, not wildcard. But that
seemed to be forgotten. 0 has been used as wildcard since 2002-08-23.
Signed-off-by: Yasuyuki Kozakai <yasuyuki@netfilter.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/netfilter_ipv6/ip6_tables.h | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/include/linux/netfilter_ipv6/ip6_tables.h b/include/linux/netfilter_ipv6/ip6_tables.h index 4686f8342cb..9a720f05888 100644 --- a/include/linux/netfilter_ipv6/ip6_tables.h +++ b/include/linux/netfilter_ipv6/ip6_tables.h @@ -44,8 +44,14 @@ struct ip6t_ip6 { char iniface[IFNAMSIZ], outiface[IFNAMSIZ]; unsigned char iniface_mask[IFNAMSIZ], outiface_mask[IFNAMSIZ]; - /* ARGH, HopByHop uses 0, so can't do 0 = ANY, - instead IP6T_F_NOPROTO must be set */ + /* Upper protocol number + * - The allowed value is 0 (any) or protocol number of last parsable + * header, which is 50 (ESP), 59 (No Next Header), 135 (MH), or + * the non IPv6 extension headers. + * - The protocol numbers of IPv6 extension headers except of ESP and + * MH do not match any packets. + * - You also need to set IP6T_FLAGS_PROTO to "flags" to check protocol. + */ u_int16_t proto; /* TOS to match iff flags & IP6T_F_TOS */ u_int8_t tos; |