diff options
| author | Hannes Frederic Sowa <hannes@stressinduktion.org> | 2013-12-14 05:13:45 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-12-18 16:58:20 -0500 |
| commit | cd174e67a6b312fce9bab502ba2b0583e11f537f (patch) | |
| tree | 992dc562f0562abdf9d549c1d06725f001270570 /net/ipv4/icmp.c | |
| parent | 974eda11c54290a1be8f8b155edae7d791e5ce57 (diff) | |
| download | lwn-cd174e67a6b312fce9bab502ba2b0583e11f537f.tar.gz lwn-cd174e67a6b312fce9bab502ba2b0583e11f537f.zip | |
ipv4: new ip_no_pmtu_disc mode to always discard incoming frag needed msgs
This new mode discards all incoming fragmentation-needed notifications
as I guess was originally intended with this knob. To not break backward
compatibility too much, I only added a special case for mode 2 in the
receiving path.
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/icmp.c')
| -rw-r--r-- | net/ipv4/icmp.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index 1a4ee84ca3f3..fb3c5637199d 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -705,7 +705,9 @@ static void icmp_unreach(struct sk_buff *skb) case ICMP_PORT_UNREACH: break; case ICMP_FRAG_NEEDED: - if (net->ipv4.sysctl_ip_no_pmtu_disc) { + if (net->ipv4.sysctl_ip_no_pmtu_disc == 2) { + goto out; + } else if (net->ipv4.sysctl_ip_no_pmtu_disc) { LIMIT_NETDEBUG(KERN_INFO pr_fmt("%pI4: fragmentation needed and DF set\n"), &iph->daddr); } else { |