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annotate packages/net/bsd_tcpip/current/include/sys/socketvar.h @ 3292:7f8e529b4d82 default tip

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Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.
author vae
date Wed, 29 Apr 2015 23:31:48 +0000
parents 74dbf4c3f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 //==========================================================================
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2 //
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3 // include/sys/socketvar.h
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4 //
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5 //==========================================================================
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6 // ####BSDCOPYRIGHTBEGIN####
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7 // -------------------------------------------
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8 // This file is part of eCos, the Embedded Configurable Operating System.
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9 //
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10 // Portions of this software may have been derived from FreeBSD
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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 // Portions created by the Free Software Foundation are
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15 // Copyright (C) 2002 Free Software Foundation, Inc.
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16 // -------------------------------------------
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17 // ####BSDCOPYRIGHTEND####
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18 //==========================================================================
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19
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20 /*-
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21 * Copyright (c) 1982, 1986, 1990, 1993
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22 * The Regents of the University of California. All rights reserved.
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23 *
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24 * Redistribution and use in source and binary forms, with or without
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25 * modification, are permitted provided that the following conditions
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26 * are met:
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27 * 1. Redistributions of source code must retain the above copyright
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28 * notice, this list of conditions and the following disclaimer.
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29 * 2. Redistributions in binary form must reproduce the above copyright
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30 * notice, this list of conditions and the following disclaimer in the
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31 * documentation and/or other materials provided with the distribution.
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32 * 3. All advertising materials mentioning features or use of this software
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33 * must display the following acknowledgement:
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34 * This product includes software developed by the University of
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35 * California, Berkeley and its contributors.
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36 * 4. Neither the name of the University nor the names of its contributors
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37 * may be used to endorse or promote products derived from this software
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38 * without specific prior written permission.
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39 *
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40 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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43 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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50 * SUCH DAMAGE.
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51 *
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52 * @(#)socketvar.h 8.3 (Berkeley) 2/19/95
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53 * $FreeBSD: src/sys/sys/socketvar.h,v 1.46.2.6 2001/08/31 13:45:49 jlemon Exp $
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54 */
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55
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56 #ifndef _SYS_SOCKETVAR_H_
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57 #define _SYS_SOCKETVAR_H_
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58
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59 #include <sys/queue.h> /* for TAILQ macros */
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60
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61 /*
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62 * Kernel structure per socket.
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63 * Contains send and receive buffer queues,
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64 * handle on protocol and pointer to protocol
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65 * private data and error information.
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66 */
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67 typedef u_quad_t so_gen_t;
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68
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69 struct accept_filter;
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70
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71 struct socket {
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72 struct vm_zone *so_zone; /* zone we were allocated from */
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73 short so_type; /* generic type, see socket.h */
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74 short so_options; /* from socket call, see socket.h */
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75 short so_linger; /* time to linger while closing */
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76 short so_state; /* internal state flags SS_*, below */
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77 caddr_t so_pcb; /* protocol control block */
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78 struct protosw *so_proto; /* protocol handle */
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79 /*
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80 * Variables for connection queuing.
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81 * Socket where accepts occur is so_head in all subsidiary sockets.
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82 * If so_head is 0, socket is not related to an accept.
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83 * For head socket so_incomp queues partially completed connections,
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84 * while so_comp is a queue of connections ready to be accepted.
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85 * If a connection is aborted and it has so_head set, then
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86 * it has to be pulled out of either so_incomp or so_comp.
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87 * We allow connections to queue up based on current queue lengths
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88 * and limit on number of queued connections for this socket.
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89 */
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90 struct socket *so_head; /* back pointer to accept socket */
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91 TAILQ_HEAD(, socket) so_incomp; /* queue of partial unaccepted connections */
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92 TAILQ_HEAD(, socket) so_comp; /* queue of complete unaccepted connections */
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93 TAILQ_ENTRY(socket) so_list; /* list of unaccepted connections */
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94 short so_qlen; /* number of unaccepted connections */
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95 short so_incqlen; /* number of unaccepted incomplete
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96 connections */
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97 short so_qlimit; /* max number queued connections */
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98 short so_timeo; /* connection timeout */
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99 u_short so_error; /* error affecting connection */
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100 struct sigio *so_sigio; /* information for async I/O or
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101 out of band data (SIGURG) */
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102 u_long so_oobmark; /* chars to oob mark */
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103 TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */
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104 /*
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105 * Variables for socket buffering.
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106 */
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107 struct sockbuf {
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108 u_long sb_cc; /* actual chars in buffer */
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109 u_long sb_hiwat; /* max actual char count */
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110 u_long sb_mbcnt; /* chars of mbufs used */
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111 u_long sb_mbmax; /* max chars of mbufs to use */
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112 long sb_lowat; /* low water mark */
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113 struct mbuf *sb_mb; /* the mbuf chain */
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114 struct selinfo sb_sel; /* process selecting read/write */
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115 short sb_flags; /* flags, see below */
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116 short sb_timeo; /* timeout for read/write */
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117 } so_rcv, so_snd;
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118 #define SB_MAX (256*1024) /* default for max chars in sockbuf */
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119 #define SB_LOCK 0x01 /* lock on data queue */
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120 #define SB_WANT 0x02 /* someone is waiting to lock */
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121 #define SB_WAIT 0x04 /* someone is waiting for data/space */
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122 #define SB_SEL 0x08 /* someone is selecting */
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123 #define SB_ASYNC 0x10 /* ASYNC I/O, need signals */
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124 #define SB_UPCALL 0x20 /* someone wants an upcall */
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125 #define SB_NOINTR 0x40 /* operations not interruptible */
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126 #define SB_AIO 0x80 /* AIO operations queued */
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127 #define SB_KNOTE 0x100 /* kernel note attached */
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128
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129 void (*so_upcall) __P((struct socket *, void *, int));
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130 void *so_upcallarg;
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131 struct ucred *so_cred; /* user credentials */
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132 /* NB: generation count must not be first; easiest to make it last. */
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133 so_gen_t so_gencnt; /* generation count */
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134 void *so_emuldata; /* private data for emulators */
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135 struct so_accf {
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136 struct accept_filter *so_accept_filter;
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137 void *so_accept_filter_arg; /* saved filter args */
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138 char *so_accept_filter_str; /* saved user args */
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139 } *so_accf;
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140 };
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141
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142 /*
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143 * Socket state bits.
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144 */
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145 #define SS_NOFDREF 0x0001 /* no file table ref any more */
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146 #define SS_ISCONNECTED 0x0002 /* socket connected to a peer */
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147 #define SS_ISCONNECTING 0x0004 /* in process of connecting to peer */
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148 #define SS_ISDISCONNECTING 0x0008 /* in process of disconnecting */
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149 #define SS_CANTSENDMORE 0x0010 /* can't send more data to peer */
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150 #define SS_CANTRCVMORE 0x0020 /* can't receive more data from peer */
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151 #define SS_RCVATMARK 0x0040 /* at mark on input */
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152
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153 #define SS_NBIO 0x0100 /* non-blocking ops */
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154 #define SS_ASYNC 0x0200 /* async i/o notify */
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155 #define SS_ISCONFIRMING 0x0400 /* deciding to accept connection req */
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156
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157 #define SS_INCOMP 0x0800 /* unaccepted, incomplete connection */
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158 #define SS_COMP 0x1000 /* unaccepted, complete connection */
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159 #define SS_ISDISCONNECTED 0x2000 /* socket disconnected from peer */
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160
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161 /*
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162 * Externalized form of struct socket used by the sysctl(3) interface.
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163 */
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164 struct xsocket {
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165 size_t xso_len; /* length of this structure */
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166 struct socket *xso_so; /* makes a convenient handle sometimes */
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167 short so_type;
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168 short so_options;
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169 short so_linger;
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170 short so_state;
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171 caddr_t so_pcb; /* another convenient handle */
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172 int xso_protocol;
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173 int xso_family;
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174 short so_qlen;
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175 short so_incqlen;
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176 short so_qlimit;
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177 short so_timeo;
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178 u_short so_error;
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179 pid_t so_pgid;
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180 u_long so_oobmark;
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181 struct xsockbuf {
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182 u_long sb_cc;
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183 u_long sb_hiwat;
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184 u_long sb_mbcnt;
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185 u_long sb_mbmax;
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186 long sb_lowat;
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187 short sb_flags;
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188 short sb_timeo;
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189 } so_rcv, so_snd;
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190 uid_t so_uid; /* XXX */
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191 };
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192
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193 /*
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194 * Macros for sockets and socket buffering.
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195 */
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196
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197 /*
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198 * Do we need to notify the other side when I/O is possible?
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199 */
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200 #define sb_notify(sb) (((sb)->sb_flags & (SB_WAIT | SB_SEL | SB_ASYNC | \
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201 SB_UPCALL | SB_AIO | SB_KNOTE)) != 0)
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202
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203 /*
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204 * How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
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205 * This is problematical if the fields are unsigned, as the space might
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206 * still be negative (cc > hiwat or mbcnt > mbmax). Should detect
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207 * overflow and return 0. Should use "lmin" but it doesn't exist now.
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208 */
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209 #define sbspace(sb) \
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210 ((long) imin((int)((sb)->sb_hiwat - (sb)->sb_cc), \
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211 (int)((sb)->sb_mbmax - (sb)->sb_mbcnt)))
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212
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213 /* do we have to send all at once on a socket? */
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214 #define sosendallatonce(so) \
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215 ((so)->so_proto->pr_flags & PR_ATOMIC)
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216
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217 /* can we read something from so? */
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218 #define soreadable(so) \
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219 ((so)->so_rcv.sb_cc >= (so)->so_rcv.sb_lowat || \
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220 ((so)->so_state & SS_CANTRCVMORE) || \
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221 (so)->so_comp.tqh_first || (so)->so_error)
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222
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223 /* can we write something to so? */
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224 #define sowriteable(so) \
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225 ((sbspace(&(so)->so_snd) >= (so)->so_snd.sb_lowat && \
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226 (((so)->so_state&SS_ISCONNECTED) || \
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227 ((so)->so_proto->pr_flags&PR_CONNREQUIRED)==0)) || \
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228 ((so)->so_state & SS_CANTSENDMORE) || \
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229 (so)->so_error)
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230
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231 /* adjust counters in sb reflecting allocation of m */
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232 #define sballoc(sb, m) { \
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233 (sb)->sb_cc += (m)->m_len; \
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234 (sb)->sb_mbcnt += MSIZE; \
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235 if ((m)->m_flags & M_EXT) \
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236 (sb)->sb_mbcnt += (m)->m_ext.ext_size; \
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237 }
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238
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239 /* adjust counters in sb reflecting freeing of m */
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240 #define sbfree(sb, m) { \
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241 (sb)->sb_cc -= (m)->m_len; \
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242 (sb)->sb_mbcnt -= MSIZE; \
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243 if ((m)->m_flags & M_EXT) \
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244 (sb)->sb_mbcnt -= (m)->m_ext.ext_size; \
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245 }
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246
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247 /*
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248 * Set lock on sockbuf sb; sleep if lock is already held.
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249 * Unless SB_NOINTR is set on sockbuf, sleep is interruptible.
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250 * Returns error without lock if sleep is interrupted.
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251 */
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252 #define sblock(sb, wf) ((sb)->sb_flags & SB_LOCK ? \
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253 (((wf) == M_WAITOK) ? sb_lock(sb) : EWOULDBLOCK) : \
2426
e71eca63cb8b * include/sys/socketvar.h: Fix very old and subtle macro bug. From
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254 ((sb)->sb_flags |= SB_LOCK, 0))
208
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255
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256 /* release lock on sockbuf sb */
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257 #define sbunlock(sb) { \
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258 (sb)->sb_flags &= ~SB_LOCK; \
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259 if ((sb)->sb_flags & SB_WANT) { \
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260 (sb)->sb_flags &= ~SB_WANT; \
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261 wakeup((caddr_t)&(sb)->sb_flags); \
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262 } \
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263 }
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264
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265 #define sorwakeup(so) do { \
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266 if (sb_notify(&(so)->so_rcv)) \
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267 sowakeup((so), &(so)->so_rcv); \
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268 } while (0)
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269
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270 #define sowwakeup(so) do { \
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271 if (sb_notify(&(so)->so_snd)) \
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272 sowakeup((so), &(so)->so_snd); \
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273 } while (0)
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274
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275 #ifdef _KERNEL
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276
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277 /*
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278 * Argument structure for sosetopt et seq. This is in the KERNEL
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279 * section because it will never be visible to user code.
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280 */
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281 enum sopt_dir { SOPT_GET, SOPT_SET };
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282 struct sockopt {
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283 enum sopt_dir sopt_dir; /* is this a get or a set? */
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284 int sopt_level; /* second arg of [gs]etsockopt */
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285 int sopt_name; /* third arg of [gs]etsockopt */
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286 void *sopt_val; /* fourth arg of [gs]etsockopt */
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287 size_t sopt_valsize; /* (almost) fifth arg of [gs]etsockopt */
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288 struct proc *sopt_p; /* calling process or null if kernel */
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289 };
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290
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291 struct sf_buf {
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292 SLIST_ENTRY(sf_buf) free_list; /* list of free buffer slots */
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293 int refcnt; /* reference count */
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294 struct vm_page *m; /* currently mapped page */
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295 vm_offset_t kva; /* va of mapping */
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296 };
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297
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298 struct accept_filter {
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299 char accf_name[16];
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300 void (*accf_callback)
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301 __P((struct socket *so, void *arg, int waitflag));
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302 void * (*accf_create)
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303 __P((struct socket *so, char *arg));
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304 void (*accf_destroy)
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305 __P((struct socket *so));
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306 SLIST_ENTRY(accept_filter) accf_next; /* next on the list */
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307 };
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308
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309 #ifdef MALLOC_DECLARE
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310 MALLOC_DECLARE(M_PCB);
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311 MALLOC_DECLARE(M_SONAME);
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312 MALLOC_DECLARE(M_ACCF);
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313 #endif
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314
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315 extern int maxsockets;
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316 extern u_long sb_max;
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317 extern struct vm_zone *socket_zone;
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318 extern so_gen_t so_gencnt;
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319
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320 struct file;
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321 struct filedesc;
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322 struct mbuf;
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323 struct sockaddr;
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324 struct stat;
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325 struct ucred;
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326 struct uio;
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327 struct knote;
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328
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329 /*
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330 * File operations on sockets.
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331 */
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332 int soo_read __P((struct file *fp, struct uio *uio, struct ucred *cred,
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333 int flags, struct proc *p));
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334 int soo_write __P((struct file *fp, struct uio *uio, struct ucred *cred,
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335 int flags, struct proc *p));
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336 int soo_close __P((struct file *fp, struct proc *p));
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337 int soo_ioctl __P((struct file *fp, u_long cmd, caddr_t data,
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338 struct proc *p));
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339 int soo_poll __P((struct file *fp, int events, struct ucred *cred,
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340 struct proc *p));
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341 int soo_stat __P((struct file *fp, struct stat *ub, struct proc *p));
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342 int sokqfilter __P((struct file *fp, struct knote *kn));
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343
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344 /*
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345 * From uipc_socket and friends
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346 */
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347 struct sockaddr *dup_sockaddr __P((struct sockaddr *sa, int canwait));
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348 int holdsock __P((struct filedesc *fdp, int fdes, struct file **fpp));
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349 int sockargs __P((struct mbuf **mp, caddr_t buf, int buflen, int type));
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350 void sbappend __P((struct sockbuf *sb, struct mbuf *m));
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351 int sbappendaddr __P((struct sockbuf *sb, struct sockaddr *asa,
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352 struct mbuf *m0, struct mbuf *control));
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353 int sbappendcontrol __P((struct sockbuf *sb, struct mbuf *m0,
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354 struct mbuf *control));
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355 void sbappendrecord __P((struct sockbuf *sb, struct mbuf *m0));
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356 void sbcheck __P((struct sockbuf *sb));
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357 void sbcompress __P((struct sockbuf *sb, struct mbuf *m, struct mbuf *n));
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358 struct mbuf *
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359 sbcreatecontrol __P((caddr_t p, int size, int type, int level));
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360 void sbdrop __P((struct sockbuf *sb, int len));
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361 void sbdroprecord __P((struct sockbuf *sb));
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362 void sbflush __P((struct sockbuf *sb));
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363 void sbinsertoob __P((struct sockbuf *sb, struct mbuf *m0));
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364 void sbrelease __P((struct sockbuf *sb, struct socket *so));
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365 int sbreserve __P((struct sockbuf *sb, u_long cc, struct socket *so,
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366 struct proc *p));
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367 void sbtoxsockbuf __P((struct sockbuf *sb, struct xsockbuf *xsb));
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368 int sbwait __P((struct sockbuf *sb));
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369 int sb_lock __P((struct sockbuf *sb));
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370 int soabort __P((struct socket *so));
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371 int soaccept __P((struct socket *so, struct sockaddr **nam));
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372 struct socket *soalloc __P((int waitok));
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373 int sobind __P((struct socket *so, struct sockaddr *nam, struct proc *p));
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374 void socantrcvmore __P((struct socket *so));
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375 void socantsendmore __P((struct socket *so));
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376 int soclose __P((struct socket *so));
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377 int soconnect __P((struct socket *so, struct sockaddr *nam, struct proc *p));
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378 int soconnect2 __P((struct socket *so1, struct socket *so2));
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379 int socreate __P((int dom, struct socket **aso, int type, int proto,
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380 struct proc *p));
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381 void sodealloc __P((struct socket *so));
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382 int sodisconnect __P((struct socket *so));
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383 void sofree __P((struct socket *so));
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384 int sogetopt __P((struct socket *so, struct sockopt *sopt));
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385 void sohasoutofband __P((struct socket *so));
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386 void soisconnected __P((struct socket *so));
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387 void soisconnecting __P((struct socket *so));
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388 void soisdisconnected __P((struct socket *so));
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389 void soisdisconnecting __P((struct socket *so));
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390 int solisten __P((struct socket *so, int backlog, struct proc *p));
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391 struct socket *
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392 sodropablereq __P((struct socket *head));
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393 struct socket *
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394 sonewconn __P((struct socket *head, int connstatus));
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395 struct socket *
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396 sonewconn3 __P((struct socket *head, int connstatus, struct proc *p));
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397 int sooptcopyin __P((struct sockopt *sopt, void *buf, size_t len,
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398 size_t minlen));
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399 int sooptcopyout __P((struct sockopt *sopt, void *buf, size_t len));
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400
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401 /* XXX; prepare mbuf for (__FreeBSD__ < 3) routines. */
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402 int soopt_getm __P((struct sockopt *sopt, struct mbuf **mp));
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403 int soopt_mcopyin __P((struct sockopt *sopt, struct mbuf *m));
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404 int soopt_mcopyout __P((struct sockopt *sopt, struct mbuf *m));
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405
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406 int sopoll __P((struct socket *so, int events, struct ucred *cred,
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407 struct proc *p));
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408 int soreceive __P((struct socket *so, struct sockaddr **paddr,
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409 struct uio *uio, struct mbuf **mp0,
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410 struct mbuf **controlp, int *flagsp));
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411 int soreserve __P((struct socket *so, u_long sndcc, u_long rcvcc));
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412 void sorflush __P((struct socket *so));
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413 int sosend __P((struct socket *so, struct sockaddr *addr, struct uio *uio,
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414 struct mbuf *top, struct mbuf *control, int flags,
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415 struct proc *p));
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416 int sosetopt __P((struct socket *so, struct sockopt *sopt));
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417 int soshutdown __P((struct socket *so, int how));
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418 void sotoxsocket __P((struct socket *so, struct xsocket *xso));
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419 void sowakeup __P((struct socket *so, struct sockbuf *sb));
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420
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421 /* accept filter functions */
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422 int accept_filt_add __P((struct accept_filter *filt));
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423 int accept_filt_del __P((char *name));
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424 struct accept_filter * accept_filt_get __P((char *name));
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425 #ifdef ACCEPT_FILTER_MOD
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426 int accept_filt_generic_mod_event __P((module_t mod, int event, void *data));
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427 SYSCTL_DECL(_net_inet_accf);
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428 #endif /* ACCEPT_FILTER_MOD */
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429
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430 #endif /* _KERNEL */
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431
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432 #endif /* !_SYS_SOCKETVAR_H_ */