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annotate packages/net/tcpip/current/include/sys/socket.h @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

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Update all copyright banners to reflect FSF ownership; fix and improve licence text.
author jlarmour
date Thu, 29 Jan 2009 17:47:46 +0000
parents e0c0827131d1
children
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1 //==========================================================================
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2 //
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3 // include/sys/socket.h
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4 //
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5 //
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6 //
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7 //==========================================================================
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8 // ####BSDALTCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // Portions of this software may have been derived from OpenBSD
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11 // or other sources, and if so are covered by the appropriate copyright
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12 // and license included herein.
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13 // -------------------------------------------
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14 // ####BSDALTCOPYRIGHTEND####
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15 //==========================================================================
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16 //#####DESCRIPTIONBEGIN####
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17 //
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18 // Author(s): gthomas
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19 // Contributors: gthomas
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20 // Date: 2000-01-10
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21 // Purpose:
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22 // Description:
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23 //
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24 //
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25 //####DESCRIPTIONEND####
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26 //
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27 //==========================================================================
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30 /* $OpenBSD: socket.h,v 1.30 1999/12/08 06:50:24 itojun Exp $ */
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31 /* $NetBSD: socket.h,v 1.14 1996/02/09 18:25:36 christos Exp $ */
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32
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33 /*
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34 * Copyright (c) 1982, 1985, 1986, 1988, 1993, 1994
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35 * The Regents of the University of California. All rights reserved.
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36 *
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37 * Redistribution and use in source and binary forms, with or without
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38 * modification, are permitted provided that the following conditions
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39 * are met:
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40 * 1. Redistributions of source code must retain the above copyright
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41 * notice, this list of conditions and the following disclaimer.
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42 * 2. Redistributions in binary form must reproduce the above copyright
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43 * notice, this list of conditions and the following disclaimer in the
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44 * documentation and/or other materials provided with the distribution.
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45 * 3. All advertising materials mentioning features or use of this software
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46 * must display the following acknowledgement:
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47 * This product includes software developed by the University of
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48 * California, Berkeley and its contributors.
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49 * 4. Neither the name of the University nor the names of its contributors
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50 * may be used to endorse or promote products derived from this software
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51 * without specific prior written permission.
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52 *
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53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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63 * SUCH DAMAGE.
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64 *
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65 * @(#)socket.h 8.4 (Berkeley) 2/21/94
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66 */
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67
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68 #ifndef _SYS_SOCKET_H_
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69 #define _SYS_SOCKET_H_
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70
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71 /*
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72 * Definitions related to sockets: types, address families, options.
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73 */
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74
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75 /*
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76 * Types
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77 */
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78 #define SOCK_STREAM 1 /* stream socket */
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79 #define SOCK_DGRAM 2 /* datagram socket */
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80 #define SOCK_RAW 3 /* raw-protocol interface */
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81 #define SOCK_RDM 4 /* reliably-delivered message */
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82 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
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83
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84 /*
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85 * Option flags per-socket.
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86 */
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87 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
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88 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
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89 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
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90 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
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91 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
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92 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
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93 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
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94 #define SO_LINGER 0x0080 /* linger on close if data present */
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95 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
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96 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
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97
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98 /*
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99 * Additional options, not kept in so_options.
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100 */
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101 #define SO_SNDBUF 0x1001 /* send buffer size */
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102 #define SO_RCVBUF 0x1002 /* receive buffer size */
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103 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
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104 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
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105 #define SO_SNDTIMEO 0x1005 /* send timeout */
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106 #define SO_RCVTIMEO 0x1006 /* receive timeout */
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107 #define SO_ERROR 0x1007 /* get error status and clear */
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108 #define SO_TYPE 0x1008 /* get socket type */
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109 #define SO_NETPROC 0x1020 /* multiplex; network processing */
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110
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111 /*
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112 * Structure used for manipulating linger option.
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113 */
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114 struct linger {
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115 int l_onoff; /* option on/off */
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116 int l_linger; /* linger time */
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117 };
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118
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119 /*
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120 * Level number for (get/set)sockopt() to apply to socket itself.
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121 */
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122 #define SOL_SOCKET 0xffff /* options for socket level */
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123
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124 /*
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125 * Address families.
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126 */
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127 #define AF_UNSPEC 0 /* unspecified */
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128 #define AF_LOCAL 1 /* local to host (pipes, portals) */
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129 #define AF_UNIX AF_LOCAL /* backward compatibility */
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130 #define AF_INET 2 /* internetwork: UDP, TCP, etc. */
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131 #define AF_IMPLINK 3 /* arpanet imp addresses */
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132 #define AF_PUP 4 /* pup protocols: e.g. BSP */
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133 #define AF_CHAOS 5 /* mit CHAOS protocols */
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134 #define AF_NS 6 /* XEROX NS protocols */
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135 #define AF_ISO 7 /* ISO protocols */
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136 #define AF_OSI AF_ISO
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137 #define AF_ECMA 8 /* european computer manufacturers */
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138 #define AF_DATAKIT 9 /* datakit protocols */
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139 #define AF_CCITT 10 /* CCITT protocols, X.25 etc */
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140 #define AF_SNA 11 /* IBM SNA */
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141 #define AF_DECnet 12 /* DECnet */
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142 #define AF_DLI 13 /* DEC Direct data link interface */
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143 #define AF_LAT 14 /* LAT */
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144 #define AF_HYLINK 15 /* NSC Hyperchannel */
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145 #define AF_APPLETALK 16 /* Apple Talk */
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146 #define AF_ROUTE 17 /* Internal Routing Protocol */
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147 #define AF_LINK 18 /* Link layer interface */
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148 #define pseudo_AF_XTP 19 /* eXpress Transfer Protocol (no AF) */
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149 #define AF_COIP 20 /* connection-oriented IP, aka ST II */
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150 #define AF_CNT 21 /* Computer Network Technology */
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151 #define pseudo_AF_RTIP 22 /* Help Identify RTIP packets */
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152 #define AF_IPX 23 /* Novell Internet Protocol */
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153 #define AF_INET6 24 /* IPv6 */
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154 #define pseudo_AF_PIP 25 /* Help Identify PIP packets */
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155 #define AF_ISDN 26 /* Integrated Services Digital Network*/
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156 #define AF_E164 AF_ISDN /* CCITT E.164 recommendation */
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157 #define AF_NATM 27 /* native ATM access */
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158 #define AF_ENCAP 28
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159 #define AF_SIP 29 /* Simple Internet Protocol */
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160 #define AF_KEY 30
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161 #define AF_MAX 31
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162
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163 /*
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164 * Structure used by kernel to store most
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165 * addresses.
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166 */
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167 struct sockaddr {
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168 u_int8_t sa_len; /* total length */
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169 sa_family_t sa_family; /* address family */
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170 char sa_data[14]; /* actually longer; address value */
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171 };
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172
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173 /*
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174 * Sockaddr type which can hold any sockaddr type available
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175 * in the system.
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176 *
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177 * Note: __ss_{len,family} is defined in RFC2553. During RFC2553 discussion
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178 * the field name went back and forth between ss_len and __ss_len,
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179 * and RFC2553 specifies it to be __ss_len. openbsd picked ss_len.
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180 * For maximum portability, userland programmer would need to
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181 * (1) make the code never touch ss_len portion (cast it into sockaddr and
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182 * touch sa_len), or (2) add "-Dss_len=__ss_len" into CFLAGS to unify all
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183 * occurences (including header file) to __ss_len.
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184 */
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185 struct sockaddr_storage {
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186 u_int8_t ss_len; /* total length */
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187 sa_family_t ss_family; /* address family */
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188 u_char __ss_pad1[6]; /* align to quad */
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189 u_int64_t __ss_pad2; /* force alignment for stupid compilers */
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190 u_char __ss_pad3[240]; /* pad to a total of 256 bytes */
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191 };
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192
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193 /*
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194 * Structure used by kernel to pass protocol
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195 * information in raw sockets.
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196 */
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197 struct sockproto {
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198 u_short sp_family; /* address family */
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199 u_short sp_protocol; /* protocol */
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200 };
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201
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202 /*
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203 * Protocol families, same as address families for now.
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204 */
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205 #define PF_UNSPEC AF_UNSPEC
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206 #define PF_LOCAL AF_LOCAL
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207 #define PF_UNIX PF_LOCAL /* backward compatibility */
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208 #define PF_INET AF_INET
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209 #define PF_INET6 AF_INET6
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210 #define PF_IMPLINK AF_IMPLINK
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211 #define PF_PUP AF_PUP
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212 #define PF_CHAOS AF_CHAOS
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213 #define PF_NS AF_NS
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214 #define PF_ISO AF_ISO
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215 #define PF_OSI AF_ISO
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216 #define PF_ECMA AF_ECMA
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217 #define PF_DATAKIT AF_DATAKIT
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218 #define PF_CCITT AF_CCITT
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219 #define PF_SNA AF_SNA
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220 #define PF_DECnet AF_DECnet
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221 #define PF_DLI AF_DLI
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222 #define PF_LAT AF_LAT
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223 #define PF_HYLINK AF_HYLINK
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224 #define PF_APPLETALK AF_APPLETALK
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225 #define PF_ROUTE AF_ROUTE
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226 #define PF_LINK AF_LINK
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227 #define PF_XTP pseudo_AF_XTP /* really just proto family, no AF */
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228 #define PF_COIP AF_COIP
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229 #define PF_CNT AF_CNT
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230 #define PF_IPX AF_IPX /* same format as AF_NS */
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231 #define PF_INET6 AF_INET6
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232 #define PF_RTIP pseudo_AF_FTIP /* same format as AF_INET */
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233 #define PF_PIP pseudo_AF_PIP
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234 #define PF_ISDN AF_ISDN
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235 #define PF_NATM AF_NATM
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236 #define PF_ENCAP AF_ENCAP
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237 #define PF_SIP AF_SIP
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238 #define PF_KEY AF_KEY
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239 #define PF_MAX AF_MAX
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240
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241 /*
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242 * These are the valid values for the "how" field used by shutdown(2).
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243 */
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244 #define SHUT_RD 0
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245 #define SHUT_WR 1
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246 #define SHUT_RDWR 2
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247
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248 /*
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249 * Socket credentials.
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250 */
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251 struct sockcred {
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252 uid_t sc_uid; /* real user id */
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253 uid_t sc_euid; /* effective user id */
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254 gid_t sc_gid; /* real group id */
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255 gid_t sc_egid; /* effective group id */
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256 int sc_ngroups; /* number of supplemental groups */
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257 gid_t sc_groups[1]; /* variable length */
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258 };
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259
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260 /*
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261 * Compute size of a sockcred structure with groups.
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262 */
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263 #define SOCKCREDSIZE(ngrps) \
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264 (sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
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265
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266 /*
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267 * Definitions for network related sysctl, CTL_NET.
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268 *
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269 * Second level is protocol family.
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270 * Third level is protocol number.
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271 *
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272 * Further levels are defined by the individual families below.
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273 */
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274 #define NET_MAXID AF_MAX
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275
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276 #define CTL_NET_NAMES { \
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277 { 0, 0 }, \
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278 { "unix", CTLTYPE_NODE }, \
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279 { "inet", CTLTYPE_NODE }, \
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280 { "implink", CTLTYPE_NODE }, \
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281 { "pup", CTLTYPE_NODE }, \
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282 { "chaos", CTLTYPE_NODE }, \
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283 { "xerox_ns", CTLTYPE_NODE }, \
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284 { "iso", CTLTYPE_NODE }, \
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285 { "emca", CTLTYPE_NODE }, \
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286 { "datakit", CTLTYPE_NODE }, \
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287 { "ccitt", CTLTYPE_NODE }, \
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288 { "ibm_sna", CTLTYPE_NODE }, \
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289 { "decnet", CTLTYPE_NODE }, \
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290 { "dec_dli", CTLTYPE_NODE }, \
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291 { "lat", CTLTYPE_NODE }, \
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292 { "hylink", CTLTYPE_NODE }, \
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293 { "appletalk", CTLTYPE_NODE }, \
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294 { "route", CTLTYPE_NODE }, \
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295 { "link_layer", CTLTYPE_NODE }, \
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296 { "xtp", CTLTYPE_NODE }, \
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297 { "coip", CTLTYPE_NODE }, \
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298 { "cnt", CTLTYPE_NODE }, \
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299 { "rtip", CTLTYPE_NODE }, \
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300 { "ipx", CTLTYPE_NODE }, \
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301 { "inet6", CTLTYPE_NODE }, \
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302 { "pip", CTLTYPE_NODE }, \
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303 { "isdn", CTLTYPE_NODE }, \
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304 { "natm", CTLTYPE_NODE }, \
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305 { "encap", CTLTYPE_NODE }, \
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306 { "sip", CTLTYPE_NODE }, \
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307 { "key", CTLTYPE_NODE }, \
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308 }
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309
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310 /*
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311 * PF_ROUTE - Routing table
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312 *
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313 * Three additional levels are defined:
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314 * Fourth: address family, 0 is wildcard
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315 * Fifth: type of info, defined below
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316 * Sixth: flag(s) to mask with for NET_RT_FLAGS
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317 */
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318 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
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319 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
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320 #define NET_RT_IFLIST 3 /* survey interface list */
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321 #define NET_RT_MAXID 4
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322
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323 #define CTL_NET_RT_NAMES { \
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324 { 0, 0 }, \
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325 { "dump", CTLTYPE_STRUCT }, \
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326 { "flags", CTLTYPE_STRUCT }, \
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327 { "iflist", CTLTYPE_STRUCT }, \
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328 }
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329
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330 /*
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331 * Maximum queue length specifiable by listen(2).
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332 */
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333 #define SOMAXCONN 128
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334
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335 /*
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336 * Message header for recvmsg and sendmsg calls.
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337 * Used value-result for recvmsg, value only for sendmsg.
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338 */
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339 struct msghdr {
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340 caddr_t msg_name; /* optional address */
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341 socklen_t msg_namelen; /* size of address */
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342 struct iovec *msg_iov; /* scatter/gather array */
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343 u_int msg_iovlen; /* # elements in msg_iov */
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344 caddr_t msg_control; /* ancillary data, see below */
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345 socklen_t msg_controllen; /* ancillary data buffer len */
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346 int msg_flags; /* flags on received message */
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347 };
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348
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349 #define MSG_OOB 0x1 /* process out-of-band data */
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350 #define MSG_PEEK 0x2 /* peek at incoming message */
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351 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
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352 #define MSG_EOR 0x8 /* data completes record */
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353 #define MSG_TRUNC 0x10 /* data discarded before delivery */
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354 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
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355 #define MSG_WAITALL 0x40 /* wait for full request or error */
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356 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
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357 #define MSG_BCAST 0x100 /* this message rec'd as broadcast */
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358 #define MSG_MCAST 0x200 /* this message rec'd as multicast */
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359
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360 /*
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361 * Header for ancillary data objects in msg_control buffer.
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362 * Used for additional information with/about a datagram
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363 * not expressible by flags. The format is a sequence
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364 * of message elements headed by cmsghdr structures.
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365 */
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366 struct cmsghdr {
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367 socklen_t cmsg_len; /* data byte count, including hdr */
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368 int cmsg_level; /* originating protocol */
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369 int cmsg_type; /* protocol-specific type */
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370 /* followed by u_char cmsg_data[]; */
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371 };
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372
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373 /* given pointer to struct cmsghdr, return pointer to data */
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374 #define CMSG_DATA(cmsg) ((u_char *)((cmsg) + 1))
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375
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376 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
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377 #define CMSG_NXTHDR(mhdr, cmsg) \
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378 (((caddr_t)(cmsg) + (cmsg)->cmsg_len + sizeof(struct cmsghdr) > \
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379 (mhdr)->msg_control + (mhdr)->msg_controllen) ? \
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380 (struct cmsghdr *)NULL : \
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381 (struct cmsghdr *)((caddr_t)(cmsg) + CMSG_ALIGN((cmsg)->cmsg_len)))
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382
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383 #define CMSG_FIRSTHDR(mhdr) ((struct cmsghdr *)(mhdr)->msg_control)
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384
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385 /* Round len up to next alignment boundary */
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386 #define CMSG_ALIGN(len) (((len)+sizeof(long)-1) & ~(sizeof(long)-1))
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387
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388 /* Length of the contents of a control message of length len */
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389 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
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390
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391 /* Length of the space taken up by a padded control message of length len */
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392 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
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393
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394 /* "Socket"-level control message types: */
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395 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
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396 #define SCM_CREDS 0x02 /* credientials (struct sockcred) */
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397
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398 /*
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399 * 4.3 compat sockaddr, move to compat file later
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400 */
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401 struct osockaddr {
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402 u_short sa_family; /* address family */
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403 char sa_data[14]; /* up to 14 bytes of direct address */
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404 };
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405
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406 /*
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407 * 4.3-compat message header (move to compat file later).
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408 */
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409 struct omsghdr {
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410 caddr_t msg_name; /* optional address */
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411 int msg_namelen; /* size of address */
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412 struct iovec *msg_iov; /* scatter/gather array */
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413 int msg_iovlen; /* # elements in msg_iov */
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414 caddr_t msg_accrights; /* access rights sent/received */
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415 int msg_accrightslen;
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416 };
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417
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418 #define SA_LEN(x) ((x)->sa_len)
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419
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420 #ifndef _KERNEL
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421
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422 #include <sys/cdefs.h>
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423
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424 __BEGIN_DECLS
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425 int accept __P((int, struct sockaddr *, socklen_t *));
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426 int bind __P((int, const struct sockaddr *, socklen_t));
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427 int connect __P((int, const struct sockaddr *, socklen_t));
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428 int getpeername __P((int, struct sockaddr *, socklen_t *));
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429 int getsockname __P((int, struct sockaddr *, socklen_t *));
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430 int getsockopt __P((int, int, int, void *, socklen_t *));
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431 int listen __P((int, int));
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432 ssize_t recv __P((int, void *, size_t, int));
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433 ssize_t recvfrom __P((int, void *, size_t, int, struct sockaddr *, socklen_t *));
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434 ssize_t recvmsg __P((int, struct msghdr *, int));
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435 ssize_t send __P((int, const void *, size_t, int));
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436 ssize_t sendto __P((int, const void *,
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437 size_t, int, const struct sockaddr *, socklen_t));
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438 ssize_t sendmsg __P((int, const struct msghdr *, int));
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439 int setsockopt __P((int, int, int, const void *, socklen_t));
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440 int shutdown __P((int, int));
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441 int socket __P((int, int, int));
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442 int socketpair __P((int, int, int, int *));
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443 __END_DECLS
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444 #else
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445 # if defined(COMPAT_43) || defined(COMPAT_SUNOS) || defined(COMPAT_LINUX) || \
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446 defined(COMPAT_HPUX) || defined(COMPAT_FREEBSD)
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447 # define COMPAT_OLDSOCK
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448 # define MSG_COMPAT 0x8000
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449 # endif
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450
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451 void pfctlinput __P((int, struct sockaddr *));
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452 #endif /* !_KERNEL */
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453
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454 #endif /* !_SYS_SOCKET_H_ */