raw_cb.c revision 97658 
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: head/sys/net/raw_cb.c 97658 2002-05-31 11:52:35Z tanimura $
35 */
36
37#include <sys/param.h>
38#include <sys/domain.h>
39#include <sys/malloc.h>
40#include <sys/protosw.h>
41#include <sys/socket.h>
42#include <sys/socketvar.h>
43#include <sys/systm.h>
44
45#include <net/raw_cb.h>
46
47/*
48 * Routines to manage the raw protocol control blocks.
49 *
50 * TODO:
51 *	hash lookups by protocol family/protocol + address family
52 *	take care of unique address problems per AF?
53 *	redo address binding to allow wildcards
54 */
55
56struct rawcb_list_head rawcb_list;
57
58static u_long	raw_sendspace = RAWSNDQ;
59static u_long	raw_recvspace = RAWRCVQ;
60
61/*
62 * Allocate a control block and a nominal amount
63 * of buffer space for the socket.
64 */
65int
66raw_attach(so, proto)
67	register struct socket *so;
68	int proto;
69{
70	register struct rawcb *rp = sotorawcb(so);
71	int error;
72
73	/*
74	 * It is assumed that raw_attach is called
75	 * after space has been allocated for the
76	 * rawcb.
77	 */
78	if (rp == 0)
79		return (ENOBUFS);
80	error = soreserve(so, raw_sendspace, raw_recvspace);
81	if (error)
82		return (error);
83	rp->rcb_socket = so;
84	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
85	rp->rcb_proto.sp_protocol = proto;
86	LIST_INSERT_HEAD(&rawcb_list, rp, list);
87	return (0);
88}
89
90/*
91 * Detach the raw connection block and discard
92 * socket resources.
93 */
94void
95raw_detach(rp)
96	register struct rawcb *rp;
97{
98	struct socket *so = rp->rcb_socket;
99
100	so->so_pcb = 0;
101	sotryfree(so);
102	LIST_REMOVE(rp, list);
103#ifdef notdef
104	if (rp->rcb_laddr)
105		m_freem(dtom(rp->rcb_laddr));
106	rp->rcb_laddr = 0;
107#endif
108	free((caddr_t)(rp), M_PCB);
109}
110
111/*
112 * Disconnect and possibly release resources.
113 */
114void
115raw_disconnect(rp)
116	struct rawcb *rp;
117{
118
119#ifdef notdef
120	if (rp->rcb_faddr)
121		m_freem(dtom(rp->rcb_faddr));
122	rp->rcb_faddr = 0;
123#endif
124	if (rp->rcb_socket->so_state & SS_NOFDREF)
125		raw_detach(rp);
126}
127
128#ifdef notdef
129#include <sys/mbuf.h>
130
131int
132raw_bind(so, nam)
133	register struct socket *so;
134	struct mbuf *nam;
135{
136	struct sockaddr *addr = mtod(nam, struct sockaddr *);
137	register struct rawcb *rp;
138
139	if (ifnet == 0)
140		return (EADDRNOTAVAIL);
141	rp = sotorawcb(so);
142	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
143	rp->rcb_laddr = mtod(nam, struct sockaddr *);
144	return (0);
145}
146#endif
147