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authorXin Long <lucien.xin@gmail.com>2016-07-09 14:47:43 +0300
committerDavid S. Miller <davem@davemloft.net>2016-07-11 23:25:39 +0300
commita6c2f792873aff332a4689717c3cd6104f46684c (patch)
tree2426d5ab4b3f7b3b4df82330a0df707a65477736 /include/net
parent826d253d57b11f69add81c8086d2e7f1dce5ec77 (diff)
downloadlinux-a6c2f792873aff332a4689717c3cd6104f46684c.tar.xz
sctp: implement prsctp TTL policy
prsctp TTL policy is a policy to abandon chunks when they expire at the specific time in local stack. It's similar with expires_at in struct sctp_datamsg. This patch uses sinfo->sinfo_timetolive to set the specific time for TTL policy. sinfo->sinfo_timetolive is also used for msg->expires_at. So if prsctp_enable or TTL policy is not enabled, msg->expires_at still works as before. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/sctp/structs.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index d8e464aacb20..6bcda715008e 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -602,6 +602,16 @@ struct sctp_chunk {
/* This needs to be recoverable for SCTP_SEND_FAILED events. */
struct sctp_sndrcvinfo sinfo;
+ /* We use this field to record param for prsctp policies,
+ * for TTL policy, it is the time_to_drop of this chunk,
+ * for RTX policy, it is the max_sent_count of this chunk,
+ * for PRIO policy, it is the priority of this chunk.
+ */
+ unsigned long prsctp_param;
+
+ /* How many times this chunk have been sent, for prsctp RTX policy */
+ int sent_count;
+
/* Which association does this belong to? */
struct sctp_association *asoc;