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33 * @(#)ns_output.c 8.1 (Berkeley) 6/10/93
34 * $FreeBSD: src/sys/netns/ns_output.c,v 1.7 1999/08/28 00:49:51 peter Exp $
35 * $DragonFly: src/sys/netproto/ns/ns_output.c,v 1.6 2004/07/27 13:50:15 hmp Exp $
38 #include <sys/param.h>
39 #include <sys/malloc.h>
41 #include <sys/errno.h>
42 #include <sys/socket.h>
43 #include <sys/socketvar.h>
46 #include <net/route.h>
53 int ns_hold_output = 0;
54 int ns_copy_output = 0;
55 int ns_output_cnt = 0;
56 struct mbuf *ns_lastout;
59 ns_output(m0, ro, flags)
64 struct idp *idp = mtod(m0, struct idp *);
65 struct ifnet *ifp = 0;
67 struct route idproute;
68 struct sockaddr_ns *dst;
72 (void)m_free(ns_lastout);
74 ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
81 bzero((caddr_t)ro, sizeof (*ro));
83 dst = (struct sockaddr_ns *)&ro->ro_dst;
85 dst->sns_family = AF_NS;
86 dst->sns_len = sizeof (*dst);
87 dst->sns_addr = idp->idp_dna;
88 dst->sns_addr.x_port = 0;
90 * If routing to interface only,
91 * short circuit routing lookup.
93 if (flags & NS_ROUTETOIF) {
94 struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
104 } else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
106 * The old route has gone away; try for a new one.
112 if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
117 if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
118 dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
122 * Look for multicast addresses and
123 * and verify user is allowed to send
126 if (dst->sns_addr.x_host.c_host[0]&1) {
127 if ((ifp->if_flags & IFF_BROADCAST) == 0) {
128 error = EADDRNOTAVAIL;
131 if ((flags & NS_ALLOWBROADCAST) == 0) {
137 if (htons(idp->idp_len) <= ifp->if_mtu) {
139 if (ns_copy_output) {
140 ns_watch_output(m0, ifp);
142 error = (*ifp->if_output)(ifp, m0,
143 (struct sockaddr *)dst, ro->ro_rt);
145 } else error = EMSGSIZE;
149 if (ns_copy_output) {
150 ns_watch_output(m0, ifp);
154 if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {