raw_cb.c revision 92d8381dd544a8237b3fd68c4e7fce9bd0903fb2
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 * $FreeBSD$
35 */
36
37#include <sys/param.h>
38#include <sys/domain.h>
39#include <sys/lock.h>
40#include <sys/malloc.h>
41#include <sys/mutex.h>
42#include <sys/protosw.h>
43#include <sys/socket.h>
44#include <sys/socketvar.h>
45
46#include <net/raw_cb.h>
47
48/*
49 * Routines to manage the raw protocol control blocks.
50 *
51 * TODO:
52 *	hash lookups by protocol family/protocol + address family
53 *	take care of unique address problems per AF?
54 *	redo address binding to allow wildcards
55 */
56
57struct rawcb_list_head rawcb_list;
58
59static u_long	raw_sendspace = RAWSNDQ;
60static u_long	raw_recvspace = RAWRCVQ;
61
62/*
63 * Allocate a control block and a nominal amount
64 * of buffer space for the socket.
65 */
66int
67raw_attach(so, proto)
68	register struct socket *so;
69	int proto;
70{
71	register struct rawcb *rp = sotorawcb(so);
72	int error;
73
74	/*
75	 * It is assumed that raw_attach is called
76	 * after space has been allocated for the
77	 * rawcb.
78	 */
79	if (rp == 0)
80		return (ENOBUFS);
81	error = soreserve(so, raw_sendspace, raw_recvspace);
82	if (error)
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	LIST_INSERT_HEAD(&rawcb_list, rp, list);
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	SOCK_LOCK(so);
103	sotryfree(so);
104	LIST_REMOVE(rp, list);
105#ifdef notdef
106	if (rp->rcb_laddr)
107		m_freem(dtom(rp->rcb_laddr));
108	rp->rcb_laddr = 0;
109#endif
110	free((caddr_t)(rp), M_PCB);
111}
112
113/*
114 * Disconnect and possibly release resources.
115 */
116void
117raw_disconnect(rp)
118	struct rawcb *rp;
119{
120
121#ifdef notdef
122	if (rp->rcb_faddr)
123		m_freem(dtom(rp->rcb_faddr));
124	rp->rcb_faddr = 0;
125#endif
126	SOCK_LOCK(rp->rcb_socket);
127	if (rp->rcb_socket->so_state & SS_NOFDREF) {
128		SOCK_UNLOCK(rp->rcb_socket);
129		raw_detach(rp);
130	} else
131		SOCK_UNLOCK(rp->rcb_socket);
132}
133
134#ifdef notdef
135#include <sys/mbuf.h>
136
137int
138raw_bind(so, nam)
139	register struct socket *so;
140	struct mbuf *nam;
141{
142	struct sockaddr *addr = mtod(nam, struct sockaddr *);
143	register struct rawcb *rp;
144
145	if (ifnet == 0)
146		return (EADDRNOTAVAIL);
147	rp = sotorawcb(so);
148	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
149	rp->rcb_laddr = mtod(nam, struct sockaddr *);
150	return (0);
151}
152#endif
153