2 * Copyright (c) 1984, 1985, 1986, 1987, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
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22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 1.8 2006/01/14 13:36:40 swildner 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(struct mbuf
*m0
, struct route
*ro
, int flags
)
61 struct idp
*idp
= mtod(m0
, struct idp
*);
62 struct ifnet
*ifp
= 0;
64 struct route idproute
;
65 struct sockaddr_ns
*dst
;
71 ns_lastout
= m_copy(m0
, 0, (int)M_COPYALL
);
78 bzero((caddr_t
)ro
, sizeof (*ro
));
80 dst
= (struct sockaddr_ns
*)&ro
->ro_dst
;
82 dst
->sns_family
= AF_NS
;
83 dst
->sns_len
= sizeof (*dst
);
84 dst
->sns_addr
= idp
->idp_dna
;
85 dst
->sns_addr
.x_port
= 0;
87 * If routing to interface only,
88 * short circuit routing lookup.
90 if (flags
& NS_ROUTETOIF
) {
91 struct ns_ifaddr
*ia
= ns_iaonnetof(&idp
->idp_dna
);
101 } else if ((ro
->ro_rt
->rt_flags
& RTF_UP
) == 0) {
103 * The old route has gone away; try for a new one.
109 if (ro
->ro_rt
== 0 || (ifp
= ro
->ro_rt
->rt_ifp
) == 0) {
114 if (ro
->ro_rt
->rt_flags
& (RTF_GATEWAY
|RTF_HOST
))
115 dst
= (struct sockaddr_ns
*)ro
->ro_rt
->rt_gateway
;
119 * Look for multicast addresses and
120 * and verify user is allowed to send
123 if (dst
->sns_addr
.x_host
.c_host
[0]&1) {
124 if ((ifp
->if_flags
& IFF_BROADCAST
) == 0) {
125 error
= EADDRNOTAVAIL
;
128 if ((flags
& NS_ALLOWBROADCAST
) == 0) {
134 if (htons(idp
->idp_len
) <= ifp
->if_mtu
) {
136 if (ns_copy_output
) {
137 ns_watch_output(m0
, ifp
);
139 lwkt_serialize_enter(ifp
->if_serializer
);
140 error
= (*ifp
->if_output
)(ifp
, m0
,
141 (struct sockaddr
*)dst
, ro
->ro_rt
);
142 lwkt_serialize_exit(ifp
->if_serializer
);
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
) {