From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Thu, 20 Oct 2016 00:10:27 -0300
Subject: Linux-libre 4.8.2-gnu

---
 net/sctp/chunk.c | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

(limited to 'net/sctp/chunk.c')

diff --git a/net/sctp/chunk.c b/net/sctp/chunk.c
index 1eb94bf18..0a3dbec0a 100644
--- a/net/sctp/chunk.c
+++ b/net/sctp/chunk.c
@@ -179,6 +179,11 @@ struct sctp_datamsg *sctp_datamsg_from_user(struct sctp_association *asoc,
 			 msg, msg->expires_at, jiffies);
 	}
 
+	if (asoc->peer.prsctp_capable &&
+	    SCTP_PR_TTL_ENABLED(sinfo->sinfo_flags))
+		msg->expires_at =
+			jiffies + msecs_to_jiffies(sinfo->sinfo_timetolive);
+
 	/* This is the biggest possible DATA chunk that can fit into
 	 * the packet
 	 */
@@ -335,13 +340,32 @@ errout:
 /* Check whether this message has expired. */
 int sctp_chunk_abandoned(struct sctp_chunk *chunk)
 {
-	struct sctp_datamsg *msg = chunk->msg;
+	if (!chunk->asoc->peer.prsctp_capable ||
+	    !SCTP_PR_POLICY(chunk->sinfo.sinfo_flags)) {
+		struct sctp_datamsg *msg = chunk->msg;
+
+		if (!msg->can_abandon)
+			return 0;
+
+		if (time_after(jiffies, msg->expires_at))
+			return 1;
 
-	if (!msg->can_abandon)
 		return 0;
+	}
 
-	if (time_after(jiffies, msg->expires_at))
+	if (SCTP_PR_TTL_ENABLED(chunk->sinfo.sinfo_flags) &&
+	    time_after(jiffies, chunk->msg->expires_at)) {
+		if (chunk->sent_count)
+			chunk->asoc->abandoned_sent[SCTP_PR_INDEX(TTL)]++;
+		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->sinfo.sinfo_timetolive) {
+		chunk->asoc->abandoned_sent[SCTP_PR_INDEX(RTX)]++;
 		return 1;
+	}
+	/* PRIO policy is processed by sendmsg, not here */
 
 	return 0;
 }
-- 
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