raw_cb.c revision 553d6172dc22f7e63cfaf3a1d0386379a80dac29
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#include <sys/systm.h>
46
47#include <net/raw_cb.h>
48
49/*
50 * Routines to manage the raw protocol control blocks.
51 *
52 * TODO:
53 *	hash lookups by protocol family/protocol + address family
54 *	take care of unique address problems per AF?
55 *	redo address binding to allow wildcards
56 */
57
58struct rawcb_list_head rawcb_list;
59
60static u_long	raw_sendspace = RAWSNDQ;
61static u_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	error = soreserve(so, raw_sendspace, raw_recvspace);
83	if (error)
84		return (error);
85	rp->rcb_socket = so;
86	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
87	rp->rcb_proto.sp_protocol = proto;
88	LIST_INSERT_HEAD(&rawcb_list, rp, list);
89	return (0);
90}
91
92/*
93 * Detach the raw connection block and discard
94 * socket resources.
95 */
96void
97raw_detach(rp)
98	register struct rawcb *rp;
99{
100	struct socket *so = rp->rcb_socket;
101
102	so->so_pcb = 0;
103	SOCK_LOCK(so);
104	sotryfree(so);
105	LIST_REMOVE(rp, list);
106#ifdef notdef
107	if (rp->rcb_laddr)
108		m_freem(dtom(rp->rcb_laddr));
109	rp->rcb_laddr = 0;
110#endif
111	free((caddr_t)(rp), M_PCB);
112}
113
114/*
115 * Disconnect and possibly release resources.
116 */
117void
118raw_disconnect(rp)
119	struct rawcb *rp;
120{
121
122#ifdef notdef
123	if (rp->rcb_faddr)
124		m_freem(dtom(rp->rcb_faddr));
125	rp->rcb_faddr = 0;
126#endif
127	SOCK_LOCK(rp->rcb_socket);
128	if (rp->rcb_socket->so_state & SS_NOFDREF) {
129		SOCK_UNLOCK(rp->rcb_socket);
130		raw_detach(rp);
131	} else
132		SOCK_UNLOCK(rp->rcb_socket);
133}
134
135#ifdef notdef
136#include <sys/mbuf.h>
137
138int
139raw_bind(so, nam)
140	register struct socket *so;
141	struct mbuf *nam;
142{
143	struct sockaddr *addr = mtod(nam, struct sockaddr *);
144	register struct rawcb *rp;
145
146	if (ifnet == 0)
147		return (EADDRNOTAVAIL);
148	rp = sotorawcb(so);
149	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
150	rp->rcb_laddr = mtod(nam, struct sockaddr *);
151	return (0);
152}
153#endif
154