raw_cb.c revision 8e9c17407ef9f9c7b35130566d0cf34b46a4772f
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/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(struct socket *so, int proto)
67{
68	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(struct rawcb *rp)
94{
95	struct socket *so = rp->rcb_socket;
96
97	so->so_pcb = 0;
98	sotryfree(so);
99	LIST_REMOVE(rp, list);
100#ifdef notdef
101	if (rp->rcb_laddr)
102		m_freem(dtom(rp->rcb_laddr));
103	rp->rcb_laddr = 0;
104#endif
105	free((caddr_t)(rp), M_PCB);
106}
107
108/*
109 * Disconnect and possibly release resources.
110 */
111void
112raw_disconnect(struct rawcb *rp)
113{
114
115#ifdef notdef
116	if (rp->rcb_faddr)
117		m_freem(dtom(rp->rcb_faddr));
118	rp->rcb_faddr = 0;
119#endif
120	if (rp->rcb_socket->so_state & SS_NOFDREF)
121		raw_detach(rp);
122}
123
124#ifdef notdef
125#include <sys/mbuf.h>
126
127int
128raw_bind(struct socket *so, struct mbuf *nam)
129{
130	struct sockaddr *addr = mtod(nam, struct sockaddr *);
131	register struct rawcb *rp;
132
133	if (ifnet == 0)
134		return (EADDRNOTAVAIL);
135	rp = sotorawcb(so);
136	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
137	rp->rcb_laddr = mtod(nam, struct sockaddr *);
138	return (0);
139}
140#endif
141