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15 * This product includes software developed by the University of
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33 * @(#)ns_output.c 8.1 (Berkeley) 6/10/93
37 #include <sys/param.h>
38 #include <sys/malloc.h>
40 #include <sys/errno.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
45 #include <net/route.h>
48 #include <netns/ns_if.h>
49 #include <netns/idp.h>
50 #include <netns/idp_var.h>
52 int ns_hold_output = 0;
53 int ns_copy_output = 0;
54 int ns_output_cnt = 0;
55 struct mbuf *ns_lastout;
57 ns_output(m0, ro, flags)
62 register struct idp *idp = mtod(m0, struct idp *);
63 register struct ifnet *ifp = 0;
65 struct route idproute;
66 struct sockaddr_ns *dst;
71 (void)m_free(ns_lastout);
73 ns_lastout = m_copy(m0, 0, (int)M_COPYALL);
80 bzero((caddr_t)ro, sizeof (*ro));
82 dst = (struct sockaddr_ns *)&ro->ro_dst;
84 dst->sns_family = AF_NS;
85 dst->sns_len = sizeof (*dst);
86 dst->sns_addr = idp->idp_dna;
87 dst->sns_addr.x_port = 0;
89 * If routing to interface only,
90 * short circuit routing lookup.
92 if (flags & NS_ROUTETOIF) {
93 struct ns_ifaddr *ia = ns_iaonnetof(&idp->idp_dna);
103 } else if ((ro->ro_rt->rt_flags & RTF_UP) == 0) {
105 * The old route has gone away; try for a new one.
111 if (ro->ro_rt == 0 || (ifp = ro->ro_rt->rt_ifp) == 0) {
116 if (ro->ro_rt->rt_flags & (RTF_GATEWAY|RTF_HOST))
117 dst = (struct sockaddr_ns *)ro->ro_rt->rt_gateway;
121 * Look for multicast addresses and
122 * and verify user is allowed to send
125 if (dst->sns_addr.x_host.c_host[0]&1) {
126 if ((ifp->if_flags & IFF_BROADCAST) == 0) {
127 error = EADDRNOTAVAIL;
130 if ((flags & NS_ALLOWBROADCAST) == 0) {
136 if (htons(idp->idp_len) <= ifp->if_mtu) {
138 if (ns_copy_output) {
139 ns_watch_output(m0, ifp);
141 error = (*ifp->if_output)(ifp, m0,
142 (struct sockaddr *)dst, ro->ro_rt);
144 } else error = EMSGSIZE;
148 if (ns_copy_output) {
149 ns_watch_output(m0, ifp);
153 if (ro == &idproute && (flags & NS_ROUTETOIF) == 0 && ro->ro_rt) {