[SCTP]: Do not timestamp every SCTP packet.
We only need the timestamp on COOKIE-ECHO chunks, so instead of always
timestamping every SCTP packet, let common code timestamp if the socket
option is set. For COOKIE-ECHO, simply get the time of day if we don't
have a timestamp. This introduces a small possibility that the cookie
may be considered expired, but it will be renegotiated.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 7745bde..507dff7 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1447,8 +1447,16 @@
/* Check to see if the cookie is stale. If there is already
* an association, there is no need to check cookie's expiration
* for init collision case of lost COOKIE ACK.
+ * If skb has been timestamped, then use the stamp, otherwise
+ * use current time. This introduces a small possibility that
+ * that a cookie may be considered expired, but his would only slow
+ * down the new association establishment instead of every packet.
*/
- skb_get_timestamp(skb, &tv);
+ if (sock_flag(ep->base.sk, SOCK_TIMESTAMP))
+ skb_get_timestamp(skb, &tv);
+ else
+ do_gettimeofday(&tv);
+
if (!asoc && tv_lt(bear_cookie->expiration, tv)) {
__u16 len;
/*