[SCTP]: Add support for SCTP_CONTEXT socket option.

Signed-off-by: Ivan Skytte Jorgensen <isj-sctp@i1.dk>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index b00d85e..8d7f26d 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -275,6 +275,7 @@
 	__u16 default_flags;
 	__u32 default_context;
 	__u32 default_timetolive;
+	__u32 default_rcv_context;
 
 	/* Heartbeat interval: The endpoint sends out a Heartbeat chunk to
 	 * the destination address every heartbeat interval. This value
@@ -1657,6 +1658,9 @@
 	__u32 default_context;
 	__u32 default_timetolive;
 
+	/* Default receive parameters */
+	__u32 default_rcv_context;
+
 	/* This tracks outbound ssn for a given stream.	 */
 	struct sctp_ssnmap *ssnmap;