xnu-792.25.20.tar.gz

[apple/xnu.git] / bsd / netinet / in_gif.c

diff --git a/bsd/netinet/in_gif.c b/bsd/netinet/in_gif.c
index 1971b49bcc9de1c77047cd398b94fec98eefcfc9..6b5b9efff2ffbedcd528e6239830df2265aac46a 100644 (file)
--- a/bsd/netinet/in_gif.c
+++ b/bsd/netinet/in_gif.c
@@ -91,11 +91,11 @@ SYSCTL_INT(_net_inet_ip, IPCTL_GIF_TTL, gifttl, CTLFLAG_RW,
        &ip_gif_ttl,    0, "");
 
 int
-in_gif_output(ifp, family, m, rt)
-       struct ifnet    *ifp;
-       int             family;
-       struct mbuf     *m;
-       struct rtentry *rt;
+in_gif_output(
+       struct ifnet    *ifp,
+       int             family,
+       struct mbuf     *m,
+       struct rtentry *rt)
 {
        struct gif_softc *sc = (struct gif_softc*)ifp;
        struct sockaddr_in *dst = (struct sockaddr_in *)&sc->gif_ro.ro_dst;
@@ -342,14 +342,18 @@ gif_encapcheck4(m, off, proto, arg)
                return 0;
        }
        /* reject packets with broadcast on source */
+       lck_mtx_lock(rt_mtx);
        for (ia4 = TAILQ_FIRST(&in_ifaddrhead); ia4;
             ia4 = TAILQ_NEXT(ia4, ia_link))
        {
                if ((ia4->ia_ifa.ifa_ifp->if_flags & IFF_BROADCAST) == 0)
                        continue;
-               if (ip.ip_src.s_addr == ia4->ia_broadaddr.sin_addr.s_addr)
+               if (ip.ip_src.s_addr == ia4->ia_broadaddr.sin_addr.s_addr) {
+                       lck_mtx_unlock(rt_mtx);
                        return 0;
+               }
        }
+       lck_mtx_unlock(rt_mtx);
 
        /* ingress filters on outer source */
        if ((sc->gif_if.if_flags & IFF_LINK2) == 0 &&