raw_cb.c revision 36726 
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 *	$Id: raw_cb.c,v 1.14 1997/10/28 15:58:33 bde Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/malloc.h>
39#include <sys/socket.h>
40#include <sys/socketvar.h>
41#include <sys/domain.h>
42#include <sys/protosw.h>
43
44#include <net/raw_cb.h>
45
46/*
47 * Routines to manage the raw protocol control blocks.
48 *
49 * TODO:
50 *	hash lookups by protocol family/protocol + address family
51 *	take care of unique address problems per AF?
52 *	redo address binding to allow wildcards
53 */
54
55struct rawcb_list_head rawcb_list;
56
57static u_long	raw_sendspace = RAWSNDQ;
58static u_long	raw_recvspace = RAWRCVQ;
59
60/*
61 * Allocate a control block and a nominal amount
62 * of buffer space for the socket.
63 */
64int
65raw_attach(so, proto)
66	register struct socket *so;
67	int proto;
68{
69	register struct rawcb *rp = sotorawcb(so);
70	int error;
71
72	/*
73	 * It is assumed that raw_attach is called
74	 * after space has been allocated for the
75	 * rawcb.
76	 */
77	if (rp == 0)
78		return (ENOBUFS);
79	error = soreserve(so, raw_sendspace, raw_recvspace);
80	if (error)
81		return (error);
82	rp->rcb_socket = so;
83	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
84	rp->rcb_proto.sp_protocol = proto;
85	LIST_INSERT_HEAD(&rawcb_list, rp, list);
86	return (0);
87}
88
89/*
90 * Detach the raw connection block and discard
91 * socket resources.
92 */
93void
94raw_detach(rp)
95	register struct rawcb *rp;
96{
97	struct socket *so = rp->rcb_socket;
98
99	so->so_pcb = 0;
100	sofree(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_WAITOK);
142	rp->rcb_laddr = mtod(nam, struct sockaddr *);
143	return (0);
144}
145#endif
146