[SCTP]: Allow unspecified port in sctp_bindx()
Allow sctp_bindx() to accept multiple address with
unspecified port. In this case, all addresses inherit
the first bound port. We still catch full mis-matches.
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Acked-by: Sridhar Samudrala <sri@us.ibm.com>
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index d370c94..a5b6e55 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -333,12 +333,19 @@
if (!sp->pf->bind_verify(sp, addr))
return -EADDRNOTAVAIL;
- /* We must either be unbound, or bind to the same port. */
- if (bp->port && (snum != bp->port)) {
- SCTP_DEBUG_PRINTK("sctp_do_bind:"
+ /* We must either be unbound, or bind to the same port.
+ * It's OK to allow 0 ports if we are already bound.
+ * We'll just inhert an already bound port in this case
+ */
+ if (bp->port) {
+ if (!snum)
+ snum = bp->port;
+ else if (snum != bp->port) {
+ SCTP_DEBUG_PRINTK("sctp_do_bind:"
" New port %d does not match existing port "
"%d.\n", snum, bp->port);
- return -EINVAL;
+ return -EINVAL;
+ }
}
if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))