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| author |   Gao Feng <fgao@ikuai8.com> | 2017-04-12 12:34:03 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-04-13 13:19:48 -0400 |
| commit | 7ed14d973f7c6742f4827fbbf6730cbe20888b8b (patch) | |
| tree | 64d4241faceea5a52dc9d571753373908130e2cc /include/net/ip.h | |
| parent | Merge branch 'rtnetlink-cleanup-user-notifications' (diff) | |
| download | linux-dev-7ed14d973f7c6742f4827fbbf6730cbe20888b8b.tar.xz linux-dev-7ed14d973f7c6742f4827fbbf6730cbe20888b8b.zip | |
net: ipv4: Refine the ipv4_default_advmss
1. Don't get the metric RTAX_ADVMSS of dst.
There are two reasons.
1) Its caller dst_metric_advmss has already invoke dst_metric_advmss
before invoke default_advmss.
2) The ipv4_default_advmss is used to get the default mss, it should
not try to get the metric like ip6_default_advmss.
2. Use sizeof(tcphdr)+sizeof(iphdr) instead of literal 40.
3. Define one new macro IPV4_MAX_PMTU instead of 65535 according to
RFC 2675, section 5.1.
Signed-off-by: Gao Feng <fgao@ikuai8.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/ip.h')
| -rw-r--r-- | include/net/ip.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/net/ip.h b/include/net/ip.h index bf264a8db1ce..821cedcc8e73 100644 --- a/include/net/ip.h +++ b/include/net/ip.h @@ -33,6 +33,8 @@ #include <net/flow.h> #include <net/flow_dissector.h> +#define IPV4_MAX_PMTU 65535U /* RFC 2675, Section 5.1 */ + struct sock; struct inet_skb_parm { |