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 |
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, sndcc: raw_sendspace, rcvcc: 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(lck: &raw_mtx); |
114 | LIST_INSERT_HEAD(&rawcb_list, rp, list); |
115 | lck_mtx_unlock(lck: &raw_mtx); |
116 | return 0; |
117 | } |
118 | |
119 | /* |
120 | * Detach the raw connection block and discard |
121 | * socket resources. |
122 | */ |
123 | void |
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(lck: &raw_mtx)) { |
132 | socket_unlock(so, refcount: 0); |
133 | lck_mtx_lock(lck: &raw_mtx); |
134 | socket_lock(so, refcount: 0); |
135 | } |
136 | LIST_REMOVE(rp, list); |
137 | lck_mtx_unlock(lck: &raw_mtx); |
138 | rp->rcb_socket = NULL; |
139 | } |
140 | |
141 | /* |
142 | * Disconnect and possibly release resources. |
143 | */ |
144 | void |
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 |
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 | |