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
82 struct rawcb_list_head rawcb_list = LIST_HEAD_INITIALIZER(rawcb_list);
83
84 static uint32_t raw_sendspace = RAWSNDQ;
85 static uint32_t raw_recvspace = RAWRCVQ;
86 extern 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 */
92 int
raw_attach(struct socket * so,int proto)93 raw_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 }
106 error = soreserve(so, raw_sendspace, raw_recvspace);
107 if (error) {
108 return error;
109 }
110 rp->rcb_socket = so;
111 rp->rcb_proto.sp_family = (uint16_t)SOCK_DOM(so);
112 rp->rcb_proto.sp_protocol = (uint16_t)proto;
113 lck_mtx_lock(&raw_mtx);
114 LIST_INSERT_HEAD(&rawcb_list, rp, list);
115 lck_mtx_unlock(&raw_mtx);
116 return 0;
117 }
118
119 /*
120 * Detach the raw connection block and discard
121 * socket resources.
122 */
123 void
raw_detach_nofree(struct rawcb * rp)124 raw_detach_nofree(struct rawcb *rp)
125 {
126 struct socket *so = rp->rcb_socket;
127
128 so->so_pcb = 0;
129 so->so_flags |= SOF_PCBCLEARING;
130 sofree(so);
131 if (!lck_mtx_try_lock(&raw_mtx)) {
132 socket_unlock(so, 0);
133 lck_mtx_lock(&raw_mtx);
134 socket_lock(so, 0);
135 }
136 LIST_REMOVE(rp, list);
137 lck_mtx_unlock(&raw_mtx);
138 rp->rcb_socket = NULL;
139 }
140
141 /*
142 * Disconnect and possibly release resources.
143 */
144 void
raw_disconnect(struct rawcb * rp)145 raw_disconnect(struct rawcb *rp)
146 {
147 struct socket *so = rp->rcb_socket;
148
149 /*
150 * A multipath subflow socket would have its SS_NOFDREF set by default,
151 * so check for SOF_MP_SUBFLOW socket flag before detaching the PCB;
152 * when the socket is closed for real, SOF_MP_SUBFLOW would be cleared.
153 */
154 if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF)) {
155 raw_detach_nofree(rp);
156 kfree_type(struct rawcb, rp);
157 }
158 }
159
160 #ifdef notdef
161 #include <sys/mbuf.h>
162
163 int
raw_bind(struct socket * so,struct mbuf * nam)164 raw_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 }
172 rp = sotorawcb(so);
173 nam = m_copym(nam, 0, M_COPYALL, M_WAITOK);
174 if (nam == NULL) {
175 return ENOBUFS;
176 }
177 rp->rcb_laddr = mtod(nam, struct sockaddr *);
178 return 0;
179 }
180 #endif
181