1/*
2 * Copyright (c) 2000-2006 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1980, 1986, 1993
30 *	The Regents of the University of California.  All rights reserved.
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 * 1. Redistributions of source code must retain the above copyright
36 *    notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 *    notice, this list of conditions and the following disclaimer in the
39 *    documentation and/or other materials provided with the distribution.
40 * 3. All advertising materials mentioning features or use of this software
41 *    must display the following acknowledgement:
42 *	This product includes software developed by the University of
43 *	California, Berkeley and its contributors.
44 * 4. Neither the name of the University nor the names of its contributors
45 *    may be used to endorse or promote products derived from this software
46 *    without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 *	@(#)raw_cb.c	8.1 (Berkeley) 6/10/93
61 */
62
63#include <sys/param.h>
64#include <sys/malloc.h>
65#include <sys/socket.h>
66#include <sys/socketvar.h>
67#include <sys/domain.h>
68#include <sys/protosw.h>
69#include <kern/locks.h>
70
71#include <net/raw_cb.h>
72
73/*
74 * Routines to manage the raw protocol control blocks.
75 *
76 * TODO:
77 *	hash lookups by protocol family/protocol + address family
78 *	take care of unique address problems per AF?
79 *	redo address binding to allow wildcards
80 */
81
82struct rawcb_list_head rawcb_list;
83
84static uint32_t	raw_sendspace = RAWSNDQ;
85static uint32_t	raw_recvspace = RAWRCVQ;
86extern lck_mtx_t 	*raw_mtx;	/*### global raw cb mutex for now */
87
88/*
89 * Allocate a control block and a nominal amount
90 * of buffer space for the socket.
91 */
92int
93raw_attach(struct socket *so, int proto)
94{
95	struct rawcb *rp = sotorawcb(so);
96	int error;
97
98	/*
99	 * It is assumed that raw_attach is called
100	 * after space has been allocated for the
101	 * rawcb.
102	 */
103	if (rp == 0)
104		return (ENOBUFS);
105	error = soreserve(so, raw_sendspace, raw_recvspace);
106	if (error)
107		return (error);
108	rp->rcb_socket = so;
109	rp->rcb_proto.sp_family = so->so_proto->pr_domain->dom_family;
110	rp->rcb_proto.sp_protocol = proto;
111	lck_mtx_lock(raw_mtx);
112	LIST_INSERT_HEAD(&rawcb_list, rp, list);
113	lck_mtx_unlock(raw_mtx);
114	return (0);
115}
116
117/*
118 * Detach the raw connection block and discard
119 * socket resources.
120 */
121void
122raw_detach(struct rawcb *rp)
123{
124	struct socket *so = rp->rcb_socket;
125
126	so->so_pcb = 0;
127	so->so_flags |= SOF_PCBCLEARING;
128	sofree(so);
129	if (!lck_mtx_try_lock(raw_mtx)) {
130		socket_unlock(so, 0);
131		lck_mtx_lock(raw_mtx);
132		socket_lock(so, 0);
133	}
134	LIST_REMOVE(rp, list);
135	lck_mtx_unlock(raw_mtx);
136#ifdef notdef
137	if (rp->rcb_laddr)
138		m_freem(dtom(rp->rcb_laddr));
139	rp->rcb_laddr = 0;
140#endif
141	rp->rcb_socket = NULL;
142	FREE((caddr_t)(rp), M_PCB);
143}
144
145/*
146 * Disconnect and possibly release resources.
147 */
148void
149raw_disconnect(struct rawcb *rp)
150{
151#ifdef notdef
152	if (rp->rcb_faddr)
153		m_freem(dtom(rp->rcb_faddr));
154	rp->rcb_faddr = 0;
155#endif
156	if (rp->rcb_socket->so_state & SS_NOFDREF)
157		raw_detach(rp);
158}
159
160#ifdef notdef
161#include <sys/mbuf.h>
162
163int
164raw_bind(struct socket *so, struct mbuf *nam)
165{
166	struct sockaddr *addr = mtod(nam, struct sockaddr *);
167	struct rawcb *rp;
168
169	if (ifnet == 0)
170		return (EADDRNOTAVAIL);
171	rp = sotorawcb(so);
172	nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
173	if (nam == NULL)
174		return ENOBUFS;
175	rp->rcb_laddr = mtod(nam, struct sockaddr *);
176	return (0);
177}
178#endif
179