linux/net/sctp
Daniel Borkmann 3f96a53211 net: sctp: rfc4443: do not report ICMP redirects to user space
Adapt the same behaviour for SCTP as present in TCP for ICMP redirect
messages. For IPv6, RFC4443, section 2.4. says:

  ...
  (e) An ICMPv6 error message MUST NOT be originated as a result of
      receiving the following:
  ...
       (e.2) An ICMPv6 redirect message [IPv6-DISC].
  ...

Therefore, do not report an error to user space, just invoke dst's redirect
callback and leave, same for IPv4 as done in TCP as well. The implication
w/o having this patch could be that the reception of such packets would
generate a poll notification and in worst case it could even tear down the
whole connection. Therefore, stop updating sk_err on redirects.

Reported-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Reported-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Suggested-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-09-16 21:40:15 -04:00
..
associola.c
auth.c
bind_addr.c
chunk.c
command.c
debug.c
endpointola.c
input.c net: sctp: rfc4443: do not report ICMP redirects to user space 2013-09-16 21:40:15 -04:00
inqueue.c
ipv6.c net: sctp: rfc4443: do not report ICMP redirects to user space 2013-09-16 21:40:15 -04:00
Kconfig
Makefile
objcnt.c
output.c
outqueue.c
primitive.c
probe.c
proc.c
protocol.c
sm_make_chunk.c
sm_sideeffect.c
sm_statefuns.c
sm_statetable.c
socket.c
ssnmap.c
sysctl.c
transport.c
tsnmap.c
ulpevent.c
ulpqueue.c