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[SCTP]: Update SCTP_PEER_ADDR_PARAMS socket option to the latest api draft.

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This patch adds support to set/get heartbeat interval, maximum number of
retransmissions, pathmtu, sackdelay time for a particular transport/
association/socket as per the latest SCTP sockets api draft11.

Signed-off-by: Frank Filz <ffilz@us.ibm.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Frank Filz 2005-12-22 11:36:46 -08:00 • committed by David S. Miller
parent fd9662555c
commit 52ccb8e90c
9 changed files with 602 additions and 227 deletions
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38
net/sctp/input.c
View file

@ -305,18 +305,36 @@ int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb)
void sctp_icmp_frag_needed(struct sock *sk, struct sctp_association *asoc,
struct sctp_transport *t, __u32 pmtu)
{
if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) {
printk(KERN_WARNING "%s: Reported pmtu %d too low, "
"using default minimum of %d\n", __FUNCTION__, pmtu,
SCTP_DEFAULT_MINSEGMENT);
pmtu = SCTP_DEFAULT_MINSEGMENT;
if (sock_owned_by_user(sk) || !t || (t->pathmtu == pmtu))
return;
if (t->param_flags & SPP_PMTUD_ENABLE) {
if (unlikely(pmtu < SCTP_DEFAULT_MINSEGMENT)) {
printk(KERN_WARNING "%s: Reported pmtu %d too low, "
"using default minimum of %d\n",
__FUNCTION__, pmtu,
SCTP_DEFAULT_MINSEGMENT);
/* Use default minimum segment size and disable
* pmtu discovery on this transport.
*/
t->pathmtu = SCTP_DEFAULT_MINSEGMENT;
t->param_flags = (t->param_flags & ~SPP_HB) |
SPP_PMTUD_DISABLE;
} else {
t->pathmtu = pmtu;
}
/* Update association pmtu. */
sctp_assoc_sync_pmtu(asoc);
}
if (!sock_owned_by_user(sk) && t && (t->pmtu != pmtu)) {
t->pmtu = pmtu;
sctp_assoc_sync_pmtu(asoc);
sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
}
/* Retransmit with the new pmtu setting.
* Normally, if PMTU discovery is disabled, an ICMP Fragmentation
* Needed will never be sent, but if a message was sent before
* PMTU discovery was disabled that was larger than the PMTU, it
* would not be fragmented, so it must be re-transmitted fragmented.
*/
sctp_retransmit(&asoc->outqueue, t, SCTP_RTXR_PMTUD);
}
/*