linux/net/sctp
lucien 8a0d19c5ed sctp: start t5 timer only when peer rwnd is 0 and local state is SHUTDOWN_PENDING
when A sends a data to B, then A close() and enter into SHUTDOWN_PENDING
state, if B neither claim his rwnd is 0 nor send SACK for this data, A
will keep retransmitting this data until t5 timeout, Max.Retrans times
can't work anymore, which is bad.

if B's rwnd is not 0, it should send abort after Max.Retrans times, only
when B's rwnd == 0 and A's retransmitting beyonds Max.Retrans times, A
will start t5 timer, which is also commit f8d9605243 ("sctp: Enforce
retransmission limit during shutdown") means, but it lacks the condition
peer rwnd == 0.

so fix it by adding a bit (zero_window_announced) in peer to record if
the last rwnd is 0. If it was, zero_window_announced will be set. and use
this bit to decide if start t5 timer when local.state is SHUTDOWN_PENDING.

Fixes: commit f8d9605243 ("sctp: Enforce retransmission limit during shutdown")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-12-06 22:31:51 -05:00
..
associola.c mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd 2015-11-06 17:50:42 -08:00
auth.c sctp: translate host order to network order when setting a hmacid 2015-11-15 18:27:27 -05:00
bind_addr.c
chunk.c switch sctp_user_addto_chunk() and sctp_datamsg_from_user() to passing iov_iter 2014-11-24 05:16:40 -05:00
debug.c
endpointola.c net: sctp: migrate most recently used transport to ktime 2014-06-11 12:23:17 -07:00
input.c sctp: Change sctp to implement csum_levels 2014-08-29 20:41:11 -07:00
inqueue.c net: sctp: fix remote memory pressure from excessive queueing 2014-10-14 12:46:22 -04:00
ipv6.c ipv6: sctp: add rcu protection around np->opt 2015-12-03 11:30:58 -05:00
Kconfig
Makefile net: sctp: Inline the functions from command.c 2014-07-08 14:38:48 -07:00
objcnt.c
output.c sctp: Fix race between OOTB responce and route removal 2015-06-29 09:28:42 -07:00
outqueue.c sctp: start t5 timer only when peer rwnd is 0 and local state is SHUTDOWN_PENDING 2015-12-06 22:31:51 -05:00
primitive.c
probe.c
proc.c sctp: replace seq_printf with seq_puts 2014-10-30 19:40:16 -04:00
protocol.c sctp: fix race on protocol/netns initialization 2015-09-11 15:00:02 -07:00
sm_make_chunk.c sctp: use the same clock as if sock source timestamps were on 2015-12-05 22:23:22 -05:00
sm_sideeffect.c sctp: Prevent soft lockup when sctp_accept() is called during a timeout event 2015-09-28 21:03:40 -07:00
sm_statefuns.c sctp: start t5 timer only when peer rwnd is 0 and local state is SHUTDOWN_PENDING 2015-12-06 22:31:51 -05:00
sm_statetable.c
socket.c sctp: only drop the reference on the datamsg after sending a msg 2015-12-06 13:25:12 -05:00
ssnmap.c
sysctl.c sctp: avoid to repeatedly declare external variables 2015-03-25 11:40:16 -04:00
transport.c remove abs64() 2015-11-09 15:11:24 -08:00
tsnmap.c
ulpevent.c sctp: Fixup v4mapped behaviour to comply with Sock API 2014-07-31 21:49:06 -07:00
ulpqueue.c net: introduce SO_INCOMING_CPU 2014-11-11 13:00:06 -05:00