kernel/linux.git/include/net/ip6_route.h, branch v3.12.43

ipv6: Limit mtu to 65575 bytes

2014-05-29T09:38:32+00:00

[ Upstream commit 30f78d8ebf7f514801e71b88a10c948275168518 ] Francois reported that setting big mtu on loopback device could prevent tcp sessions making progress. We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets. We must limit the IPv6 MTU to (65535 + 40) bytes in theory. Tested: ifconfig lo mtu 70000 netperf -H ::1 Before patch : Throughput : 0.05 Mbits After patch : Throughput : 35484 Mbits Reported-by: Francois WELLENREITER Signed-off-by: Eric Dumazet Acked-by: YOSHIFUJI Hideaki Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller Signed-off-by: Jiri Slaby

ipv6: fill rt6i_gateway with nexthop address

2013-10-21T22:37:01+00:00

Make sure rt6i_gateway contains nexthop information in all routes returned from lookup or when routes are directly attached to skb for generated ICMP packets. The effect of this patch should be a faster version of rt6_nexthop() and the consideration of local addresses as nexthop. Signed-off-by: Julian Anastasov Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

ipv6: always prefer rt6i_gateway if present

2013-10-21T22:37:00+00:00

In v3.9 6fd6ce2056de2709 ("ipv6: Do not depend on rt->n in ip6_finish_output2()." changed the behaviour of ip6_finish_output2() such that the recently introduced rt6_nexthop() is used instead of an assigned neighbor. As rt6_nexthop() prefers rt6i_gateway only for gatewayed routes this causes a problem for users like IPVS, xt_TEE and RAW(hdrincl) if they want to use different address for routing compared to the destination address. Another case is when redirect can create RTF_DYNAMIC route without RTF_GATEWAY flag, we ignore the rt6i_gateway in rt6_nexthop(). Fix the above problems by considering the rt6i_gateway if present, so that traffic routed to address on local subnet is not wrongly diverted to the destination address. Thanks to Simon Horman and Phil Oester for spotting the problematic commit. Thanks to Hannes Frederic Sowa for his review and help in testing. Reported-by: Phil Oester Reported-by: Mark Brooks Signed-off-by: Julian Anastasov Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

ipv6: move ip6_dst_hoplimit() into core kernel

2013-09-01T02:29:59+00:00

It will be used by vxlan, and may not be inlined. Cc: Eric Dumazet Signed-off-by: Cong Wang Signed-off-by: David S. Miller

ipv6: handle Redirect ICMP Message with no Redirected Header option

2013-08-23T03:08:21+00:00

rfc 4861 says the Redirected Header option is optional, so the kernel should not drop the Redirect Message that has no Redirected Header option. In this patch, the function ip6_redirect_no_header() is introduced to deal with that condition. Signed-off-by: Duan Jiong Acked-by: Hannes Frederic Sowa

ipv6: Remove unused neigh argument for icmp6_dst_alloc() and its callers.

2013-01-18T19:41:13+00:00

Because of rt->n removal, we do not need neigh argument any more. Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller

ipv6: Introduce rt6_nexthop() to select nexthop address.

2013-01-17T23:38:19+00:00

For RTF_GATEWAY route, return rt->rt6i_gateway. Otherwise, return 2nd argument (destination address). This will be used by following patches which remove rt->n dependency patches in ip6_dst_lookup_tail() and ip6_finish_output2(). Signed-off-by: YOSHIFUJI Hideaki Signed-off-by: David S. Miller

ipv6: export IP6_RT_PRIO_* to userland

2012-11-16T06:47:40+00:00

The kernel uses some default metric when routes are managed. For example, a static route added with a metric set to 0 is inserted in the kernel with metric 1024 (IP6_RT_PRIO_USER). It is useful for routing daemons to know these values, to be able to set routes without interfering with what the kernel does. Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller

ipv6: fix inet6_csk_xmit()

2012-07-18T15:59:58+00:00

We should provide to inet6_csk_route_socket a struct flowi6 pointer, so that net6_csk_xmit() works correctly instead of sending garbage. Also add some consts Signed-off-by: Eric Dumazet Reported-by: Yuchung Cheng Cc: Neal Cardwell Signed-off-by: David S. Miller

ipv6: Use icmpv6_notify() to propagate redirect, instead of rt6_redirect().

2012-07-12T07:33:37+00:00

And delete rt6_redirect(), since it is no longer used. Signed-off-by: David S. Miller