BSD 4_3_Net_2 release
[unix-history] / usr / src / sys / netrmp / rmp.c
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1/*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1990 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.
9 *
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10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
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37 *
38 * from: Utah $Hdr: rmp.c 1.3 89/06/07$
39 *
1c15e888 40 * @(#)rmp.c 7.1 (Berkeley) 5/8/90
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41 */
42
43#include "param.h"
44#include "mbuf.h"
45#include "socket.h"
46#include "socketvar.h"
47
48#include "../net/if.h"
49#include "../net/route.h"
50#include "../net/raw_cb.h"
51
52#include "../netrmp/rmp.h"
53#include "../netrmp/rmp_var.h"
54
55/*
56** rmp_output: route packet to proper network interface.
57*/
58
59rmp_output(m, so)
60struct mbuf *m;
61struct socket *so;
62{
63 struct ifnet *ifp;
64 struct rawcb *rp = sotorawcb(so);
65 struct rmp_packet *rmp;
66
67 /*
68 * Convert the mbuf back to an RMP packet so we can get the
69 * address of the "ifnet struct" specifying the interface it
70 * should go out on.
71 */
72 rmp = mtod(m, struct rmp_packet *);
73 ifp = rmp->ifp;
74
75 /*
76 * Strip off the "ifnet struct ptr" from the packet leaving
77 * us with a complete IEEE 802.2 packet.
78 */
79 m_adj(m, sizeof(struct ifnet *));
80
81 /*
82 * Send the packet.
83 */
84 return ((*ifp->if_output) (ifp, m, &rp->rcb_faddr));
85}