raw_cb.c revision 1.12 
1/*	$NetBSD: raw_cb.c,v 1.12 2001/11/12 23:49:47 lukem 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 1.12 2001/11/12 23:49:47 lukem 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
64u_long	raw_sendspace = RAWSNDQ;
65u_long	raw_recvspace = RAWRCVQ;
66
67/*
68 * Allocate a control block and a nominal amount
69 * of buffer space for the socket.
70 */
71int
72raw_attach(so, proto)
73	struct socket *so;
74	int proto;
75{
76	struct rawcb *rp = sotorawcb(so);
77	int error;
78
79	/*
80	 * It is assumed that raw_attach is called
81	 * after space has been allocated for the
82	 * rawcb.
83	 */
84	if (rp == 0)
85		return (ENOBUFS);
86	if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
87		return (error);
88	rp->rcb_socket = so;
89	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
90	rp->rcb_proto.sp_protocol = proto;
91	LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
92	return (0);
93}
94
95/*
96 * Detach the raw connection block and discard
97 * socket resources.
98 */
99void
100raw_detach(rp)
101	struct rawcb *rp;
102{
103	struct socket *so = rp->rcb_socket;
104
105	so->so_pcb = 0;
106	sofree(so);
107	LIST_REMOVE(rp, rcb_list);
108#ifdef notdef
109	if (rp->rcb_laddr)
110		m_freem(dtom(rp->rcb_laddr));
111	rp->rcb_laddr = 0;
112#endif
113	free((caddr_t)rp, M_PCB);
114}
115
116/*
117 * Disconnect and possibly release resources.
118 */
119void
120raw_disconnect(rp)
121	struct rawcb *rp;
122{
123
124#ifdef notdef
125	if (rp->rcb_faddr)
126		m_freem(dtom(rp->rcb_faddr));
127	rp->rcb_faddr = 0;
128#endif
129	if (rp->rcb_socket->so_state & SS_NOFDREF)
130		raw_detach(rp);
131}
132