1/*
2 * Copyright (c) 2000-2012 Apple 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 = SOCK_DOM(so);
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 struct socket *so = rp->rcb_socket;
152
153#ifdef notdef
154 if (rp->rcb_faddr)
155 m_freem(dtom(rp->rcb_faddr));
156 rp->rcb_faddr = 0;
157#endif
158 /*
159 * A multipath subflow socket would have its SS_NOFDREF set by default,
160 * so check for SOF_MP_SUBFLOW socket flag before detaching the PCB;
161 * when the socket is closed for real, SOF_MP_SUBFLOW would be cleared.
162 */
163 if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF))
164 raw_detach(rp);
165}
166
167#ifdef notdef
168#include <sys/mbuf.h>
169
170int
171raw_bind(struct socket *so, struct mbuf *nam)
172{
173 struct sockaddr *addr = mtod(nam, struct sockaddr *);
174 struct rawcb *rp;
175
176 if (ifnet == 0)
177 return (EADDRNOTAVAIL);
178 rp = sotorawcb(so);
179 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
180 if (nam == NULL)
181 return ENOBUFS;
182 rp->rcb_laddr = mtod(nam, struct sockaddr *);
183 return (0);
184}
185#endif
186