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1c79356b 1/*
6d2010ae 2 * Copyright (c) 2008-2010 Apple Inc. All rights reserved.
5d5c5d0d 3 *
2d21ac55 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b 5 *
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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.
8f6c56a5 14 *
2d21ac55
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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
8f6c56a5
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20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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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.
8f6c56a5 25 *
2d21ac55 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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27 */
28/*
29 * Copyright (c) 1982, 1986, 1989, 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 * @(#)unpcb.h 8.1 (Berkeley) 6/2/93
61 */
62
63#ifndef _SYS_UNPCB_H_
64#define _SYS_UNPCB_H_
65
9bccf70c 66#include <sys/appleapiopts.h>
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67#include <sys/queue.h>
68#include <sys/un.h>
91447636 69#include <sys/ucred.h>
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70
71/*
72 * Protocol control block for an active
73 * instance of a UNIX internal protocol.
74 *
75 * A socket may be associated with an vnode in the
76 * file system. If so, the unp_vnode pointer holds
77 * a reference count to this vnode, which should be irele'd
78 * when the socket goes away.
79 *
80 * A socket may be connected to another socket, in which
81 * case the control block of the socket to which it is connected
82 * is given by unp_conn.
83 *
84 * A socket may be referenced by a number of sockets (e.g. several
85 * sockets may be connected to a datagram socket.) These sockets
86 * are in a linked list starting with unp_refs, linked through
87 * unp_nextref and null-terminated. Note that a socket may be referenced
88 * by a number of other sockets and may also reference a socket (not
89 * necessarily one which is referencing it). This generates
90 * the need for unp_refs and unp_nextref to be separate fields.
91 *
92 * Stream sockets keep copies of receive sockbuf sb_cc and sb_mbcnt
93 * so that changes in the sockbuf may be computed to modify
94 * back pressure on the sender accordingly.
95 */
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96
97typedef u_quad_t unp_gen_t;
98
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99#if defined(__LP64__)
100struct _unpcb_list_entry {
101 u_int32_t le_next;
102 u_int32_t le_prev;
103};
104#define _UCPCB_LIST_HEAD(name, type) \
105struct name { \
106 u_int32_t lh_first; \
107};
108#define _UNPCB_LIST_ENTRY(x) struct _unpcb_list_entry
109#define _UNPCB_PTR(x) u_int32_t
110#else
111#define _UCPCB_LIST_HEAD(name, type) LIST_HEAD(name, type)
112#define _UNPCB_LIST_ENTRY(x) LIST_ENTRY(x)
113#define _UNPCB_PTR(x) x
114#endif
115
91447636 116#ifdef PRIVATE
b0d623f7 117#ifndef KERNEL
2d21ac55 118_UCPCB_LIST_HEAD(unp_head, unpcb);
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119#else
120LIST_HEAD(unp_head, unpcb);
91447636 121#define sotounpcb(so) ((struct unpcb *)((so)->so_pcb))
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122
123struct unpcb {
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124 LIST_ENTRY(unpcb) unp_link; /* glue on list of all PCBs */
125 struct socket *unp_socket; /* pointer back to socket */
126 struct vnode *unp_vnode; /* if associated with file */
127 ino_t unp_ino; /* fake inode number */
128 struct unpcb *unp_conn; /* control block of connected socket */
129 struct unp_head unp_refs; /* referencing socket linked list */
1c79356b 130 LIST_ENTRY(unpcb) unp_reflink; /* link in unp_refs list */
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131 struct sockaddr_un *unp_addr; /* bound address of socket */
132 int unp_cc; /* copy of rcv.sb_cc */
133 int unp_mbcnt; /* copy of rcv.sb_mbcnt */
134 unp_gen_t unp_gencnt; /* generation count of this instance */
135 int unp_flags; /* flags */
136 struct xucred unp_peercred; /* peer credentials, if applicable */
6d2010ae 137 decl_lck_mtx_data( ,unp_mtx); /* per unpcb lock */
b0d623f7 138 int rw_thrcount; /* disconnect should wait for this count to become zero */
1c79356b 139};
91447636 140#endif /* KERNEL */
1c79356b 141
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142/*
143 * Flags in unp_flags.
144 *
145 * UNP_HAVEPC - indicates that the unp_peercred member is filled in
146 * and is really the credentials of the connected peer. This is used
147 * to determine whether the contents should be sent to the user or
148 * not.
149 *
150 * UNP_HAVEPCCACHED - indicates that the unp_peercred member is filled
151 * in, but does *not* contain the credentials of the connected peer
152 * (there may not even be a peer). This is set in unp_listen() when
153 * it fills in unp_peercred for later consumption by unp_connect().
154 */
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155#define UNP_HAVEPC 0x0001
156#define UNP_HAVEPCCACHED 0x0002
157#define UNP_DONTDISCONNECT 0x0004
6d2010ae 158#define UNP_TRACE_MDNS 0x1000
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159
160#ifdef KERNEL
161struct unpcb_compat {
162#else /* KERNEL */
163#define unpcb_compat unpcb
164struct unpcb {
165#endif /* KERNEL */
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166 _UNPCB_LIST_ENTRY(unpcb_compat) unp_link; /* glue on list of all PCBs */
167 _UNPCB_PTR(struct socket *) unp_socket; /* pointer back to socket */
168 _UNPCB_PTR(struct vnode *) unp_vnode; /* if associated with file */
316670eb 169 u_int32_t unp_ino; /* fake inode number */
2d21ac55 170 _UNPCB_PTR(struct unpcb_compat *) unp_conn; /* control block of connected socket */
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171#if defined(KERNEL)
172 u_int32_t unp_refs;
173#else
2d21ac55 174 struct unp_head unp_refs; /* referencing socket linked list */
b0d623f7 175#endif
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176 _UNPCB_LIST_ENTRY(unpcb_compat) unp_reflink; /* link in unp_refs list */
177 _UNPCB_PTR(struct sockaddr_un *) unp_addr; /* bound address of socket */
178 int unp_cc; /* copy of rcv.sb_cc */
179 int unp_mbcnt; /* copy of rcv.sb_mbcnt */
180 unp_gen_t unp_gencnt; /* generation count of this instance */
91447636 181};
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182
183/* Hack alert -- this structure depends on <sys/socketvar.h>. */
91447636 184#ifdef _SYS_SOCKETVAR_H_
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185
186#pragma pack(4)
187
91447636 188struct xunpcb {
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189 u_int32_t xu_len; /* length of this structure */
190 _UNPCB_PTR(struct unpcb_compat *) xu_unpp; /* to help netstat, fstat */
191 struct unpcb_compat xu_unp; /* our information */
192 union {
193 struct sockaddr_un xuu_addr; /* our bound address */
194 char xu_dummy1[256];
195 } xu_au;
91447636 196#define xu_addr xu_au.xuu_addr
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197 union {
198 struct sockaddr_un xuu_caddr; /* their bound address */
199 char xu_dummy2[256];
200 } xu_cau;
91447636 201#define xu_caddr xu_cau.xuu_caddr
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202 struct xsocket xu_socket;
203 u_quad_t xu_alignment_hack;
1c79356b 204};
2d21ac55 205
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206
207struct xunpcb64_list_entry {
208 u_int64_t le_next;
209 u_int64_t le_prev;
210};
211
212struct xunpcb64 {
213 u_int32_t xu_len; /* length of this structure */
214 u_int64_t xu_unpp; /* to help netstat, fstat */
215 struct xunpcb64_list_entry xunp_link; /* glue on list of all PCBs */
216 u_int64_t xunp_socket; /* pointer back to socket */
217 u_int64_t xunp_vnode; /* if associated with file */
218 u_int64_t xunp_ino; /* fake inode number */
219 u_int64_t xunp_conn; /* control block of connected socket */
220 u_int64_t xunp_refs; /* referencing socket linked list */
221 struct xunpcb64_list_entry xunp_reflink; /* link in unp_refs list */
222 int xunp_cc; /* copy of rcv.sb_cc */
223 int xunp_mbcnt; /* copy of rcv.sb_mbcnt */
224 unp_gen_t xunp_gencnt; /* generation count of this instance */
225 int xunp_flags; /* flags */
226 union {
227 struct sockaddr_un xuu_addr;
228 char xu_dummy1[256];
229 } xu_au; /* our bound address */
230#define xunp_addr xu_au.xuu_addr
231 union {
232 struct sockaddr_un xuu_caddr;
233 char xu_dummy2[256];
234 } xu_cau; /* their bound address */
235#define xunp_caddr xu_cau.xuu_caddr
236 struct xsocket64 xu_socket;
237};
238
b0d623f7 239
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240#pragma pack()
241
91447636 242#endif /* _SYS_SOCKETVAR_H_ */
b0d623f7 243
91447636 244#endif /* PRIVATE */
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245
246struct xunpgen {
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247 u_int32_t xug_len;
248 u_int xug_count;
249 unp_gen_t xug_gen;
250 so_gen_t xug_sogen;
1c79356b 251};
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252
253#endif /* _SYS_UNPCB_H_ */