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authorXin Long <lucien.xin@gmail.com>2016-07-09 19:47:44 +0800
committerDavid S. Miller <davem@davemloft.net>2016-07-11 13:25:39 -0700
commit01aadb3af6e1b10970c1f7e510b5097c8f725d64 (patch)
tree48a0b5f81a01756090b6ecfe815f777be10f2041 /net/sctp/chunk.c
parenta6c2f792873aff332a4689717c3cd6104f46684c (diff)
downloadlinux-01aadb3af6e1b10970c1f7e510b5097c8f725d64.tar.bz2
sctp: implement prsctp RTX policy
prsctp RTX policy is a policy to abandon chunks when they are retransmitted beyond the max count. This patch uses sent_count to count how many times one chunk has been sent, and prsctp_param is the max rtx count, which is from sinfo->sinfo_timetolive in sctp_set_prsctp_policy(). So similar to TTL policy, if RTX policy is enabled, msg->expire_at won't work. Then in sctp_chunk_abandoned, this patch checks if chunk->sent_count is bigger than chunk->prsctp_param to abandon this chunk. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/chunk.c')
-rw-r--r--net/sctp/chunk.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 2698d122e201..b3692b55a8d2 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -355,6 +355,10 @@ int sctp_chunk_abandoned(struct sctp_chunk *chunk)
else
chunk->asoc->abandoned_unsent[SCTP_PR_INDEX(TTL)]++;
return 1;
+ } else if (SCTP_PR_RTX_ENABLED(chunk->sinfo.sinfo_flags) &&
+ chunk->sent_count > chunk->prsctp_param) {
+ chunk->asoc->abandoned_sent[SCTP_PR_INDEX(RTX)]++;
+ return 1;
}
return 0;