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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 1.4 2003/08/07 21:17:38 dillon 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>
54 #include <machine/mtpr.h>
56 int ns_hold_output = 0;
57 int ns_copy_output = 0;
58 int ns_output_cnt = 0;
59 struct mbuf *ns_lastout;
61 ns_output(m0, ro, flags)
66 struct idp *idp = mtod(m0, struct idp *);
67 struct ifnet *ifp = 0;
69 struct route idproute;
70 struct sockaddr_ns *dst;
75 (void)m_free(ns_lastout);
77 ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
84 bzero((caddr_t)ro, sizeof (*ro));
86 dst = (struct sockaddr_ns *)&ro->ro_dst;
88 dst->sns_family = AF_NS;
89 dst->sns_len = sizeof (*dst);
90 dst->sns_addr = idp->idp_dna;
91 dst->sns_addr.x_port = 0;
93 * If routing to interface only,
94 * short circuit routing lookup.
96 if (flags & NS_ROUTETOIF) {
97 struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
107 } else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
109 * The old route has gone away; try for a new one.
115 if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
120 if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
121 dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
125 * Look for multicast addresses and
126 * and verify user is allowed to send
129 if (dst->sns_addr.x_host.c_host[0]&1) {
130 if ((ifp->if_flags & IFF_BROADCAST) == 0) {
131 error = EADDRNOTAVAIL;
134 if ((flags & NS_ALLOWBROADCAST) == 0) {
140 if (htons(idp->idp_len) <= ifp->if_mtu) {
142 if (ns_copy_output) {
143 ns_watch_output(m0, ifp);
145 error = (*ifp->if_output)(ifp, m0,
146 (struct sockaddr *)dst, ro->ro_rt);
148 } else error = EMSGSIZE;
152 if (ns_copy_output) {
153 ns_watch_output(m0, ifp);
157 if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {