raw_cb.c revision 1.13 
1/*	$NetBSD: raw_cb.c,v 1.13 2002/05/12 20:40:12 matt Exp $	*/
2
3/*
4 * Copyright (c) 1980, 1986, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *	@(#)raw_cb.c	8.1 (Berkeley) 6/10/93
36 */
37
38#include <sys/cdefs.h>
39__KERNEL_RCSID(0, "$NetBSD: raw_cb.c,v 1.13 2002/05/12 20:40:12 matt Exp $");
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/mbuf.h>
44#include <sys/socket.h>
45#include <sys/socketvar.h>
46#include <sys/domain.h>
47#include <sys/protosw.h>
48#include <sys/errno.h>
49
50#include <net/if.h>
51#include <net/route.h>
52#include <net/raw_cb.h>
53#include <netinet/in.h>
54
55/*
56 * Routines to manage the raw protocol control blocks.
57 *
58 * TODO:
59 *	hash lookups by protocol family/protocol + address family
60 *	take care of unique address problems per AF?
61 *	redo address binding to allow wildcards
62 */
63
64struct	rawcbhead rawcb = LIST_HEAD_INITIALIZER(rawcb);
65
66u_long	raw_sendspace = RAWSNDQ;
67u_long	raw_recvspace = RAWRCVQ;
68
69/*
70 * Allocate a control block and a nominal amount
71 * of buffer space for the socket.
72 */
73int
74raw_attach(so, proto)
75	struct socket *so;
76	int proto;
77{
78	struct rawcb *rp = sotorawcb(so);
79	int error;
80
81	/*
82	 * It is assumed that raw_attach is called
83	 * after space has been allocated for the
84	 * rawcb.
85	 */
86	if (rp == 0)
87		return (ENOBUFS);
88	if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
89		return (error);
90	rp->rcb_socket = so;
91	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
92	rp->rcb_proto.sp_protocol = proto;
93	LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
94	return (0);
95}
96
97/*
98 * Detach the raw connection block and discard
99 * socket resources.
100 */
101void
102raw_detach(rp)
103	struct rawcb *rp;
104{
105	struct socket *so = rp->rcb_socket;
106
107	so->so_pcb = 0;
108	sofree(so);
109	LIST_REMOVE(rp, rcb_list);
110#ifdef notdef
111	if (rp->rcb_laddr)
112		m_freem(dtom(rp->rcb_laddr));
113	rp->rcb_laddr = 0;
114#endif
115	free((caddr_t)rp, M_PCB);
116}
117
118/*
119 * Disconnect and possibly release resources.
120 */
121void
122raw_disconnect(rp)
123	struct rawcb *rp;
124{
125
126#ifdef notdef
127	if (rp->rcb_faddr)
128		m_freem(dtom(rp->rcb_faddr));
129	rp->rcb_faddr = 0;
130#endif
131	if (rp->rcb_socket->so_state & SS_NOFDREF)
132		raw_detach(rp);
133}
134