diff options
Diffstat (limited to 'sys')
| -rw-r--r-- | sys/netinet6/in6_mcast.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sys/netinet6/in6_mcast.c b/sys/netinet6/in6_mcast.c index d872b8767a5a..4bc66e67b0e8 100644 --- a/sys/netinet6/in6_mcast.c +++ b/sys/netinet6/in6_mcast.c @@ -2348,11 +2348,15 @@ in6p_set_multicast_if(struct inpcb *inp, struct sockopt *sopt) return (error); if (V_if_index < ifindex) return (EINVAL); - - ifp = ifnet_byindex(ifindex); - if (ifp == NULL || (ifp->if_flags & IFF_MULTICAST) == 0) - return (EADDRNOTAVAIL); - + if (ifindex == 0) + ifp = NULL; + else { + ifp = ifnet_byindex(ifindex); + if (ifp == NULL) + return (EINVAL); + if ((ifp->if_flags & IFF_MULTICAST) == 0) + return (EADDRNOTAVAIL); + } imo = in6p_findmoptions(inp); imo->im6o_multicast_ifp = ifp; INP_WUNLOCK(inp); |