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[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>
This commit is contained in:
Vlad Yasevich 2006-09-29 17:10:03 -07:00 committed by David S. Miller
parent b56bab46f3
commit f236218b72
2 changed files with 9 additions and 7 deletions
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6
net/sctp/input.c
View File

@ -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);

10
net/sctp/sm_make_chunk.c
View File

@ -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;
/*