raw_cb.c revision 1817 
1/*
2 * Copyright (c) 1980, 1986, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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
31 * SUCH DAMAGE.
32 *
33 *	@(#)raw_cb.c	8.1 (Berkeley) 6/10/93
34 * $Id$
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/mbuf.h>
40#include <sys/socket.h>
41#include <sys/socketvar.h>
42#include <sys/domain.h>
43#include <sys/protosw.h>
44#include <sys/errno.h>
45
46#include <net/if.h>
47#include <net/route.h>
48#include <net/raw_cb.h>
49#include <netinet/in.h>
50
51/*
52 * Routines to manage the raw protocol control blocks.
53 *
54 * TODO:
55 *	hash lookups by protocol family/protocol + address family
56 *	take care of unique address problems per AF?
57 *	redo address binding to allow wildcards
58 */
59
60u_long	raw_sendspace = RAWSNDQ;
61u_long	raw_recvspace = RAWRCVQ;
62
63/*
64 * Allocate a control block and a nominal amount
65 * of buffer space for the socket.
66 */
67int
68raw_attach(so, proto)
69	register struct socket *so;
70	int proto;
71{
72	register struct rawcb *rp = sotorawcb(so);
73	int error;
74
75	/*
76	 * It is assumed that raw_attach is called
77	 * after space has been allocated for the
78	 * rawcb.
79	 */
80	if (rp == 0)
81		return (ENOBUFS);
82	if (error = soreserve(so, raw_sendspace, raw_recvspace))
83		return (error);
84	rp->rcb_socket = so;
85	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
86	rp->rcb_proto.sp_protocol = proto;
87	insque(rp, &rawcb);
88	return (0);
89}
90
91/*
92 * Detach the raw connection block and discard
93 * socket resources.
94 */
95void
96raw_detach(rp)
97	register struct rawcb *rp;
98{
99	struct socket *so = rp->rcb_socket;
100
101	so->so_pcb = 0;
102	sofree(so);
103	remque(rp);
104#ifdef notdef
105	if (rp->rcb_laddr)
106		m_freem(dtom(rp->rcb_laddr));
107	rp->rcb_laddr = 0;
108#endif
109	free((caddr_t)(rp), M_PCB);
110}
111
112/*
113 * Disconnect and possibly release resources.
114 */
115void
116raw_disconnect(rp)
117	struct rawcb *rp;
118{
119
120#ifdef notdef
121	if (rp->rcb_faddr)
122		m_freem(dtom(rp->rcb_faddr));
123	rp->rcb_faddr = 0;
124#endif
125	if (rp->rcb_socket->so_state & SS_NOFDREF)
126		raw_detach(rp);
127}
128
129#ifdef notdef
130int
131raw_bind(so, nam)
132	register struct socket *so;
133	struct mbuf *nam;
134{
135	struct sockaddr *addr = mtod(nam, struct sockaddr *);
136	register struct rawcb *rp;
137
138	if (ifnet == 0)
139		return (EADDRNOTAVAIL);
140	rp = sotorawcb(so);
141	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
142	rp->rcb_laddr = mtod(nam, struct sockaddr *);
143	return (0);
144}
145#endif
146