Add const qualifier to the dst parameter of the ifnet if_output method.

1 files changed, 8 insertions, 8 deletions

diff --git a/sys/net/if_loop.c b/sys/net/if_loop.c
index acf8012..499cd2c 100644
--- a/sys/net/if_loop.c
+++ b/sys/net/if_loop.c
@@ -101,7 +101,7 @@
 int		loioctl(struct ifnet *, u_long, caddr_t);
 static void	lortrequest(int, struct rtentry *, struct rt_addrinfo *);
 int		looutput(struct ifnet *ifp, struct mbuf *m,
-		    struct sockaddr *dst, struct route *ro);
+		    const struct sockaddr *dst, struct route *ro);
 static int	lo_clone_create(struct if_clone *, int, caddr_t);
 static void	lo_clone_destroy(struct ifnet *);
 
@@ -210,7 +210,7 @@ static moduledata_t loop_mod = {
 DECLARE_MODULE(if_lo, loop_mod, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_ANY);
 
 int
-looutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
+looutput(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
     struct route *ro)
 {
 	u_int32_t af;
@@ -241,13 +241,13 @@ looutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 	ifp->if_obytes += m->m_pkthdr.len;
 
 	/* BPF writes need to be handled specially. */
-	if (dst->sa_family == AF_UNSPEC) {
+	if (dst->sa_family == AF_UNSPEC)
 		bcopy(dst->sa_data, &af, sizeof(af));
-		dst->sa_family = af;
-	}
+	else
+		af = dst->sa_family;
 
 #if 1	/* XXX */
-	switch (dst->sa_family) {
+	switch (af) {
 	case AF_INET:
 		if (ifp->if_capenable & IFCAP_RXCSUM) {
 			m->m_pkthdr.csum_data = 0xffff;
@@ -276,12 +276,12 @@ looutput(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
 	case AF_APPLETALK:
 		break;
 	default:
-		printf("looutput: af=%d unexpected\n", dst->sa_family);
+		printf("looutput: af=%d unexpected\n", af);
 		m_freem(m);
 		return (EAFNOSUPPORT);
 	}
 #endif
-	return (if_simloop(ifp, m, dst->sa_family, 0));
+	return (if_simloop(ifp, m, af, 0));
 }
 
 /*