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| author |   Eric Dumazet <edumazet@google.com> | 2017-10-18 17:02:03 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-10-21 01:55:05 +0100 |
| commit | 164a5e7ad531e181334a3d3f03d0d5ad20d6faea (patch) | |
| tree | 5d78b377974176cc696dafd4c76e5defec13e0a6 /net/ipv4/route.c | |
| parent | Merge branch 'ieee802154-for-davem-2017-10-18' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan-next (diff) | |
| download | linux-dev-164a5e7ad531e181334a3d3f03d0d5ad20d6faea.tar.xz linux-dev-164a5e7ad531e181334a3d3f03d0d5ad20d6faea.zip | |
ipv4: ipv4_default_advmss() should use route mtu
ipv4_default_advmss() incorrectly uses the device MTU instead
of the route provided one. IPv6 has the proper behavior,
lets harmonize the two protocols.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 4306db827374..bc40bd411196 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1250,7 +1250,7 @@ static void set_class_tag(struct rtable *rt, u32 tag) static unsigned int ipv4_default_advmss(const struct dst_entry *dst) { unsigned int header_size = sizeof(struct tcphdr) + sizeof(struct iphdr); - unsigned int advmss = max_t(unsigned int, dst->dev->mtu - header_size, + unsigned int advmss = max_t(unsigned int, ipv4_mtu(dst) - header_size, ip_rt_min_advmss); return min(advmss, IPV4_MAX_PMTU - header_size); |