diff options
| author | Hideaki Yoshifuji <yoshfuji@linux-ipv6.org> | 2005-03-04 08:38:31 +0900 |
|---|---|---|
| committer | Hideaki Yoshifuji <yoshfuji@linux-ipv6.org> | 2005-03-04 08:38:31 +0900 |
| commit | 8b123d00b713465bb5d262cdfa9a05d3e34f612d (patch) | |
| tree | 8c3336e93d87aa3df92e26e4e4f4a8a883fa46a2 /include | |
| parent | 3b4804268a4aa955614ad03770f6a68cc808403e (diff) | |
[IPV6] Always add a fragment header after receiving TOO BIG w/ pmtu < 1280.
According to RFC2460, PMTU is set to the IPv6 Minimum Link
MTU (1280) and a fragment header should always be included
after a node receiving Too Big message reporting PMTU is
less than the IPv6 Minimum Link MTU (1280).
Signed-off-by: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ip.h | 1 | ||||
| -rw-r--r-- | include/linux/rtnetlink.h | 1 | ||||
| -rw-r--r-- | include/net/dst.h | 9 |
3 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/ip.h b/include/linux/ip.h index 487152a404f8..7d7633632d28 100644 --- a/include/linux/ip.h +++ b/include/linux/ip.h @@ -152,6 +152,7 @@ struct inet_sock { }; #define IPCORK_OPT 1 /* ip-options has been held in ipcork.opt */ +#define IPCORK_ALLFRAG 2 /* always fragment (for ipv6 for now) */ static inline struct inet_sock *inet_sk(const struct sock *sk) { diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h index c3d5d043a5ca..5f6310f0d880 100644 --- a/include/linux/rtnetlink.h +++ b/include/linux/rtnetlink.h @@ -346,6 +346,7 @@ enum #define RTAX_FEATURE_ECN 0x00000001 #define RTAX_FEATURE_SACK 0x00000002 #define RTAX_FEATURE_TIMESTAMP 0x00000004 +#define RTAX_FEATURE_ALLFRAG 0x00000008 struct rta_session { diff --git a/include/net/dst.h b/include/net/dst.h index b7e47a7ad105..785c4a185ff5 100644 --- a/include/net/dst.h +++ b/include/net/dst.h @@ -124,6 +124,15 @@ dst_pmtu(const struct dst_entry *dst) return mtu; } +static inline u32 +dst_allfrag(const struct dst_entry *dst) +{ + int ret = dst_path_metric(dst, RTAX_FEATURES) & RTAX_FEATURE_ALLFRAG; + /* Yes, _exactly_. This is paranoia. */ + barrier(); + return ret; +} + static inline int dst_metric_locked(struct dst_entry *dst, int metric) { |