raw_cb.c revision 82295697cd4bae93852c3a10a939f20227018fbd
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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	@(#)raw_cb.c	8.1 (Berkeley) 6/10/93
30 * $FreeBSD$
31 */
32
33#include <sys/param.h>
34#include <sys/domain.h>
35#include <sys/lock.h>
36#include <sys/malloc.h>
37#include <sys/mutex.h>
38#include <sys/protosw.h>
39#include <sys/socket.h>
40#include <sys/socketvar.h>
41#include <sys/systm.h>
42
43#include <net/raw_cb.h>
44
45/*
46 * Routines to manage the raw protocol control blocks.
47 *
48 * TODO:
49 *	hash lookups by protocol family/protocol + address family
50 *	take care of unique address problems per AF?
51 *	redo address binding to allow wildcards
52 */
53
54struct rawcb_list_head rawcb_list;
55
56const static u_long	raw_sendspace = RAWSNDQ;
57const static u_long	raw_recvspace = RAWRCVQ;
58
59/*
60 * Allocate a control block and a nominal amount
61 * of buffer space for the socket.
62 */
63int
64raw_attach(so, proto)
65	register struct socket *so;
66	int proto;
67{
68	register struct rawcb *rp = sotorawcb(so);
69	int error;
70
71	/*
72	 * It is assumed that raw_attach is called
73	 * after space has been allocated for the
74	 * rawcb.
75	 */
76	if (rp == 0)
77		return (ENOBUFS);
78	error = soreserve(so, raw_sendspace, raw_recvspace);
79	if (error)
80		return (error);
81	rp->rcb_socket = so;
82	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
83	rp->rcb_proto.sp_protocol = proto;
84	LIST_INSERT_HEAD(&rawcb_list, rp, list);
85	return (0);
86}
87
88/*
89 * Detach the raw connection block and discard
90 * socket resources.
91 */
92void
93raw_detach(rp)
94	register struct rawcb *rp;
95{
96	struct socket *so = rp->rcb_socket;
97
98	SOCK_LOCK(so);
99	so->so_pcb = 0;
100	sotryfree(so);
101	LIST_REMOVE(rp, list);
102#ifdef notdef
103	if (rp->rcb_laddr)
104		m_freem(dtom(rp->rcb_laddr));
105	rp->rcb_laddr = 0;
106#endif
107	free((caddr_t)(rp), M_PCB);
108}
109
110/*
111 * Disconnect and possibly release resources.
112 */
113void
114raw_disconnect(rp)
115	struct rawcb *rp;
116{
117
118#ifdef notdef
119	if (rp->rcb_faddr)
120		m_freem(dtom(rp->rcb_faddr));
121	rp->rcb_faddr = 0;
122#endif
123	if (rp->rcb_socket->so_state & SS_NOFDREF)
124		raw_detach(rp);
125}
126
127#ifdef notdef
128#include <sys/mbuf.h>
129
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_TRYWAIT);
142	rp->rcb_laddr = mtod(nam, struct sockaddr *);
143	return (0);
144}
145#endif
146