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Fix a bug where Multicast packets sent from a

Browse source 
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)
This commit is contained in:
Randall Stewart 2011-01-19 19:07:16 +00:00
parent fbfbce8ae9
commit a38b1c8c5e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=217592
1 changed files with 5 additions and 3 deletions
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8
sys/netinet/udp_usrreq.c
View file

@ -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;