[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 <[EMAIL PROTECTED]>
Signed-off-by: Sridhar Samudrala <[EMAIL PROTECTED]>
---
net/sctp/input.c | 6 ------
net/sctp/sm_make_chunk.c | 10 +++++++++-
2 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/net/sctp/input.c b/net/sctp/input.c
index 4714882..64f6301 100644
--- a/net/sctp/input.c
+++ b/net/sctp/input.c
@@ -218,12 +218,6 @@ int sctp_rcv(struct sk_buff *skb)
}
}
- /* SCTP seems to always need a timestamp right now (FIXME) */
- if (skb->tstamp.off_sec == 0) {
- __net_timestamp(skb);
- sock_enable_timestamp(sk);
- }
-
if (!xfrm_policy_check(sk, XFRM_POLICY_IN, skb, family))
goto discard_release;
nf_reset(skb);
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 @@ no_hmac:
/* 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;
/*
-
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