Author: rrs
Date: Wed Jan 19 19:07:16 2011
New Revision: 217592
URL: http://svn.freebsd.org/changeset/base/217592
Log:
Fix a bug where Multicast packets sent from a
udp endpoint may end up echoing back to the sender
even with OUT joining the multi-cast group.
Reviewed by: gnn, bms, bz?
Obtained from: deischen (with help from)
Modified:
head/sys/netinet/udp_usrreq.c
Modified: head/sys/netinet/udp_usrreq.c
==============================================================================
--- head/sys/netinet/udp_usrreq.c Wed Jan 19 18:20:11 2011
(r217591)
+++ head/sys/netinet/udp_usrreq.c Wed Jan 19 19:07:16 2011
(r217592)
@@ -479,11 +479,13 @@ udp_input(struct mbuf *m, int off)
* and source-specific multicast. [RFC3678]
*/
imo = inp->inp_moptions;
- if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) &&
- imo != NULL) {
+ if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr))) {
struct sockaddr_in group;
int blocked;
-
+ if(imo == NULL) {
+ INP_RUNLOCK(inp);
+ continue;
+ }
bzero(&group, sizeof(struct sockaddr_in));
group.sin_len = sizeof(struct sockaddr_in);
group.sin_family = AF_INET;
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