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sctp: bail from sctp_endpoint_lookup_assoc() if not bound 

The sctp_endpoint_lookup_assoc() function uses a port hash
to lookup the association and then checks to see if any of
them are on the current endpoint.  However, if the current
endpoint is not bound, there can't be any associations on
it, thus we can bail early.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vlad Yasevich 2011-04-19 21:29:23 +00:00 committed by David S. Miller
parent 0b8f9e25b0
commit deb85a6ecc
1 changed files with 14 additions and 6 deletions
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20
net/sctp/endpointola.c
View File

@ -325,6 +325,7 @@ static struct sctp_association *__sctp_endpoint_lookup_assoc(
struct sctp_transport **transport)
{
struct sctp_association *asoc = NULL;
struct sctp_association *tmp;
struct sctp_transport *t = NULL;
struct sctp_hashbucket *head;
struct sctp_ep_common *epb;
@ -333,25 +334,32 @@ static struct sctp_association *__sctp_endpoint_lookup_assoc(
int rport;
*transport = NULL;
/* If the local port is not set, there can't be any associations
* on this endpoint.
*/
if (!ep->base.bind_addr.port)
goto out;
rport = ntohs(paddr->v4.sin_port);
hash = sctp_assoc_hashfn(ep->base.bind_addr.port, rport);
head = &sctp_assoc_hashtable[hash];
read_lock(&head->lock);
sctp_for_each_hentry(epb, node, &head->chain) {
asoc = sctp_assoc(epb);
if (asoc->ep != ep || rport != asoc->peer.port)
goto next;
tmp = sctp_assoc(epb);
if (tmp->ep != ep || rport != tmp->peer.port)
continue;
t = sctp_assoc_lookup_paddr(asoc, paddr);
t = sctp_assoc_lookup_paddr(tmp, paddr);
if (t) {
asoc = tmp;
*transport = t;
break;
}
next:
asoc = NULL;
}
read_unlock(&head->lock);
out:
return asoc;
}