raw_cb.c revision 1.11 
1/*	$NetBSD: raw_cb.c,v 1.11 2000/03/30 09:45:40 augustss 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/param.h>
39#include <sys/systm.h>
40#include <sys/mbuf.h>
41#include <sys/socket.h>
42#include <sys/socketvar.h>
43#include <sys/domain.h>
44#include <sys/protosw.h>
45#include <sys/errno.h>
46
47#include <net/if.h>
48#include <net/route.h>
49#include <net/raw_cb.h>
50#include <netinet/in.h>
51
52/*
53 * Routines to manage the raw protocol control blocks.
54 *
55 * TODO:
56 *	hash lookups by protocol family/protocol + address family
57 *	take care of unique address problems per AF?
58 *	redo address binding to allow wildcards
59 */
60
61u_long	raw_sendspace = RAWSNDQ;
62u_long	raw_recvspace = RAWRCVQ;
63
64/*
65 * Allocate a control block and a nominal amount
66 * of buffer space for the socket.
67 */
68int
69raw_attach(so, proto)
70	struct socket *so;
71	int proto;
72{
73	struct rawcb *rp = sotorawcb(so);
74	int error;
75
76	/*
77	 * It is assumed that raw_attach is called
78	 * after space has been allocated for the
79	 * rawcb.
80	 */
81	if (rp == 0)
82		return (ENOBUFS);
83	if ((error = soreserve(so, raw_sendspace, raw_recvspace)) != 0)
84		return (error);
85	rp->rcb_socket = so;
86	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
87	rp->rcb_proto.sp_protocol = proto;
88	LIST_INSERT_HEAD(&rawcb, rp, rcb_list);
89	return (0);
90}
91
92/*
93 * Detach the raw connection block and discard
94 * socket resources.
95 */
96void
97raw_detach(rp)
98	struct rawcb *rp;
99{
100	struct socket *so = rp->rcb_socket;
101
102	so->so_pcb = 0;
103	sofree(so);
104	LIST_REMOVE(rp, rcb_list);
105#ifdef notdef
106	if (rp->rcb_laddr)
107		m_freem(dtom(rp->rcb_laddr));
108	rp->rcb_laddr = 0;
109#endif
110	free((caddr_t)rp, M_PCB);
111}
112
113/*
114 * Disconnect and possibly release resources.
115 */
116void
117raw_disconnect(rp)
118	struct rawcb *rp;
119{
120
121#ifdef notdef
122	if (rp->rcb_faddr)
123		m_freem(dtom(rp->rcb_faddr));
124	rp->rcb_faddr = 0;
125#endif
126	if (rp->rcb_socket->so_state & SS_NOFDREF)
127		raw_detach(rp);
128}
129