multicast route global variable

Hi,

To move towards multiprocessor multicast routing, we have to get
rid of global variables.  This sin one is easy.

ok?

bluhm

Index: netinet/ip_mroute.c
===================================================================
RCS file: /data/mirror/openbsd/cvs/src/sys/netinet/ip_mroute.c,v
diff -u -p -r1.150 ip_mroute.c
--- netinet/ip_mroute.c	19 Jul 2025 16:40:40 -0000	1.150
+++ netinet/ip_mroute.c	23 Jun 2026 17:44:39 -0000
@@ -740,8 +740,6 @@ get_api_config(struct mbuf *m)
 	return (0);
 }
 
-static struct sockaddr_in sin = { sizeof(sin), AF_INET };
-
 int
 add_vif(struct socket *so, struct mbuf *m)
 {
@@ -771,6 +769,8 @@ add_vif(struct socket *so, struct mbuf *
 	if (vifcp->vifc_flags & VIFF_TUNNEL)
 		return (EOPNOTSUPP);
 	{
+		struct sockaddr_in sin = { sizeof(sin), AF_INET };
+
 		sin.sin_addr = vifcp->vifc_lcl_addr;
 		ifa = ifa_ifwithaddr(sintosa(&sin), rtableid);
 		if (ifa == NULL)
@@ -1205,6 +1205,7 @@ ip_mforward(struct mbuf *m, struct ifnet
 		mrtstat_inc(mrts_no_route);
 
 		{
+			struct sockaddr_in sin = { sizeof(sin), AF_INET };
 			struct igmpmsg *im;
 
 			/*