D29947.diff
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	diff --git a/sys/netinet/ip_mroute.c b/sys/netinet/ip_mroute.c
	--- a/sys/netinet/ip_mroute.c
	+++ b/sys/netinet/ip_mroute.c
	@@ -244,6 +244,8 @@
	static int pim_encapcheck(const struct mbuf , int, int, void );
	static int pim_input(struct mbuf , int, int, void );

	+extern int in_mcast_loop;
	+
	static const struct encap_config ipv4_encap_cfg = {
	.proto = IPPROTO_PIM,
	.min_length = sizeof(struct ip) + PIM_MINLEN,
	@@ -1685,7 +1687,7 @@

	imo.imo_multicast_ifp = vifp->v_ifp;
	imo.imo_multicast_ttl = mtod(m, struct ip *)->ip_ttl - 1;
	- imo.imo_multicast_loop = 1;
	+ imo.imo_multicast_loop = !!in_mcast_loop;
	imo.imo_multicast_vif = -1;
	STAILQ_INIT(&imo.imo_head);