user/sven/linux.git/include/net/ip6_route.h, branch v3.18.22

ipv6: protect skb->sk accesses from recursive dereference inside the stack

2015-04-27T20:48:28Z

[ Upstream commit f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ] We should not consult skb->sk for output decisions in xmit recursion levels > 0 in the stack. Otherwise local socket settings could influence the result of e.g. tunnel encapsulation process. ipv6 does not conform with this in three places: 1) ip6_fragment: we do consult ipv6_npinfo for frag_size 2) sk_mc_loop in ipv6 uses skb->sk and checks if we should loop the packet back to the local socket 3) ip6_skb_dst_mtu could query the settings from the user socket and force a wrong MTU Furthermore: In sk_mc_loop we could potentially land in WARN_ON(1) if we use a PF_PACKET socket ontop of an IPv6-backed vxlan device. Reuse xmit_recursion as we are currently only interested in protecting tunnel devices. Cc: Jiri Pirko Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2014-05-24T04:32:30Z

Conflicts: drivers/net/bonding/bond_alb.c drivers/net/ethernet/altera/altera_msgdma.c drivers/net/ethernet/altera/altera_sgdma.c net/ipv6/xfrm6_output.c Several cases of overlapping changes. The xfrm6_output.c has a bug fix which overlaps the renaming of skb->local_df to skb->ignore_df. In the Altera TSE driver cases, the register access cleanups in net-next overlapped with bug fixes done in net. Similarly a bug fix to send ALB packets in the bonding driver using the right source address overlaps with cleanups in net-next. Signed-off-by: David S. Miller

ipv6: update Destination Cache entries when gateway turn into host

2014-05-16T03:26:27Z

RFC 4861 states in 7.2.5: The IsRouter flag in the cache entry MUST be set based on the Router flag in the received advertisement. In those cases where the IsRouter flag changes from TRUE to FALSE as a result of this update, the node MUST remove that router from the Default Router List and update the Destination Cache entries for all destinations using that neighbor as a router as specified in Section 7.3.3. This is needed to detect when a node that is used as a router stops forwarding packets due to being configured as a host. Currently, when dealing with NA Message which IsRouter flag changes from TRUE to FALSE, the kernel only removes router from the Default Router List, and don't update the Destination Cache entries. Now in order to update those Destination Cache entries, i introduce function rt6_clean_tohost(). Signed-off-by: Duan Jiong Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

net: rename local_df to ignore_df

2014-05-12T18:03:41Z

As suggested by several people, rename local_df to ignore_df, since it means "ignore df bit if it is set". Cc: Maciej Żenczykowski Cc: Florian Westphal Cc: David S. Miller Cc: Eric Dumazet Signed-off-by: Cong Wang Acked-by: Maciej Żenczykowski Signed-off-by: David S. Miller

ipv6: Limit mtu to 65575 bytes

2014-04-14T16:39:59Z

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

ipv6: reuse rt6_need_strict

2014-03-31T20:16:16Z

Move the whole rt6_need_strict as static inline into ip6_route.h, so that it can be reused Signed-off-by: Wang Yufen Signed-off-by: David S. Miller

ipv6: yet another new IPV6_MTU_DISCOVER option IPV6_PMTUDISC_OMIT

2014-02-26T20:51:01Z

This option has the same semantic as IP_PMTUDISC_OMIT for IPv4 which got recently introduced. It doesn't honor the path mtu discovered by the host but in contrary to IPV6_PMTUDISC_INTERFACE allows the generation of fragments if the packet size exceeds the MTU of the outgoing interface MTU. Fixes: 93b36cf3425b9b ("ipv6: support IPV6_PMTU_INTERFACE on sockets") Cc: Florian Weimer Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

IPv6: add the option to use anycast addresses as source addresses in echo reply

2014-01-07T20:51:39Z

This change allows to follow a recommandation of RFC4942. - Add "anycast_src_echo_reply" sysctl to control the use of anycast addresses as source addresses for ICMPv6 echo reply. This sysctl is false by default to preserve existing behavior. - Add inline check ipv6_anycast_destination(). - Use them in icmpv6_echo_reply(). Reference: RFC4942 - IPv6 Transition/Coexistence Security Considerations (http://tools.ietf.org/html/rfc4942#section-2.1.6) 2.1.6. Anycast Traffic Identification and Security [...] To avoid exposing knowledge about the internal structure of the network, it is recommended that anycast servers now take advantage of the ability to return responses with the anycast address as the source address if possible. Signed-off-by: Francois-Xavier Le Bail Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller

ipv6: namespace cleanups

2014-01-02T04:46:09Z

Running 'make namespacecheck' shows: net/ipv6/route.o ipv6_route_table_template rt6_bind_peer net/ipv6/icmp.o icmpv6_route_lookup ipv6_icmp_table_template This addresses some of those warnings by: * make icmpv6_route_lookup static * move inline's out of ip6_route.h since only used into route.c * move rt6_bind_peer into route.c Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller

ipv6: support IPV6_PMTU_INTERFACE on sockets

2013-12-18T22:37:05Z

IPV6_PMTU_INTERFACE is the same as IPV6_PMTU_PROBE for ipv6. Add it nontheless for symmetry with IPv4 sockets. Also drop incoming MTU information if this mode is enabled. The additional bit in ipv6_pinfo just eats in the padding behind the bitfield. There are no changes to the layout of the struct at all. Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller