X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/0b4e3aa066abc0728aacb4bbeb86f53f9737156e..d52fe63fc81f7e44faaae711812a211a78434976:/bsd/netinet/ip_output.c?ds=sidebyside

diff --git a/bsd/netinet/ip_output.c b/bsd/netinet/ip_output.c
index 1018b8d21..fa63025aa 100644
--- a/bsd/netinet/ip_output.c
+++ b/bsd/netinet/ip_output.c
@@ -351,8 +351,10 @@ ip_output(m0, opt, ro, flags, imo)
 		 */
 		if (imo != NULL) {
 			ip->ip_ttl = imo->imo_multicast_ttl;
-			if (imo->imo_multicast_ifp != NULL)
+			if (imo->imo_multicast_ifp != NULL) {
 				ifp = imo->imo_multicast_ifp;
+				dl_tag = ifp->if_data.default_proto;
+			}
 			if (imo->imo_multicast_vif != -1)
 				ip->ip_src.s_addr =
 				    ip_mcast_src(imo->imo_multicast_vif);
@@ -1043,7 +1045,7 @@ in_delayed_cksum(struct mbuf *m)
 
         csum = in_cksum_skip(m, ip->ip_len, offset);
 
-	if (csum == 0)
+	if ((m->m_pkthdr.csum_flags & CSUM_UDP) && csum == 0)
 		csum = 0xffff;
 
         offset += m->m_pkthdr.csum_data & 0xFFFF;        /* checksum offset */