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annotate libfdcore/tcp.c @ 1562:6219359a36a9 default tip

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Merge latest changes from proposed branch
author Sebastien Decugis <sdecugis@freediameter.net>
date Mon, 21 Jun 2021 19:08:18 +0800
parents 8c4dd4b693c6
children
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1 /*********************************************************************************************************
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2 * Software License Agreement (BSD License) *
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3 * Author: Sebastien Decugis <sdecugis@freediameter.net> *
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4 * *
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5 * Copyright (c) 2013, WIDE Project and NICT *
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6 * All rights reserved. *
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7 * *
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8 * Redistribution and use of this software in source and binary forms, with or without modification, are *
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9 * permitted provided that the following conditions are met: *
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10 * *
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11 * * Redistributions of source code must retain the above *
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12 * copyright notice, this list of conditions and the *
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13 * following disclaimer. *
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14 * *
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15 * * Redistributions in binary form must reproduce the above *
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16 * copyright notice, this list of conditions and the *
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17 * following disclaimer in the documentation and/or other *
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18 * materials provided with the distribution. *
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19 * *
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20 * * Neither the name of the WIDE Project or NICT nor the *
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21 * names of its contributors may be used to endorse or *
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22 * promote products derived from this software without *
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23 * specific prior written permission of WIDE Project and *
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24 * NICT. *
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25 * *
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26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED *
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27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A *
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28 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR *
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29 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT *
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30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
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31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR *
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32 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF *
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33 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *
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34 *********************************************************************************************************/
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35
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36 #include "fdcore-internal.h"
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37 #include "cnxctx.h"
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38
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39 #include <netinet/tcp.h>
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40 #include <netinet/ip6.h>
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41 #include <sys/socket.h>
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42
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43 /* Set the socket options for TCP sockets, before bind is called */
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44 static int fd_tcp_setsockopt(int family, int sk)
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45 {
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46 int ret = 0;
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47 int opt;
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48
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49 /* Clear the NODELAY option in case it was set, as requested by rfc3539#section-3.2 */
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50 /* Note that this is supposed to be the default, so we could probably remove this call ... */
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51 opt = 0;
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52 ret = setsockopt(sk, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
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53 if (ret != 0) {
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54 ret = errno;
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55 TRACE_DEBUG(INFO, "Unable to set the socket TCP_NODELAY option: %s", strerror(ret));
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56 return ret;
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57 }
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58
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59 /* Under Linux, we may also set the TCP_CONGESTION option to one of the following strings:
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60 - reno (default)
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61 - bic
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62 - cubic
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63 - highspeed
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64 - htcp
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65 - hybla
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66 - illinois
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67 - lp
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68 - scalable
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69 - vegas
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70 - veno
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71 - westwood
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72 - yeah
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73 */
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74
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75 /* In case of v6 address, force the v6only option, we use a different socket for v4 */
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76 #ifdef IPV6_V6ONLY
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77 if (family == AF_INET6) {
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78 opt = 1;
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79 CHECK_SYS(setsockopt(sk, IPPROTO_IPV6, IPV6_V6ONLY, &opt, sizeof(opt)));
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80 }
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81 #endif /* IPV6_V6ONLY */
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82
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83 {
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84 opt = 1;
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85 CHECK_SYS( setsockopt(sk, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) );
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86 }
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87
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88 /* There are also others sockopt that can be set, but nothing useful for us AFAICT */
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89
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90 return 0;
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91 }
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92
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93 /* Create a socket server and bind it */
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94 int fd_tcp_create_bind_server( int * sock, sSA * sa, socklen_t salen )
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95 {
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96 TRACE_ENTRY("%p %p %d", sock, sa, salen);
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97
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98 CHECK_PARAMS( sock && sa );
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99
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100 /* Create the socket */
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101 CHECK_SYS( *sock = socket(sa->sa_family, SOCK_STREAM, IPPROTO_TCP) );
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102
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103 /* Set the socket options */
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104 CHECK_FCT( fd_tcp_setsockopt(sa->sa_family, *sock) );
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105
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106 /* Bind the socket */
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107 CHECK_SYS( bind( *sock, sa, salen ) );
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108
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109 /* We're done */
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110 return 0;
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111 }
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112
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113 /* Allow clients connections on server sockets */
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114 int fd_tcp_listen( int sock )
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115 {
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116 TRACE_ENTRY("%d", sock);
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117 CHECK_SYS( listen(sock, 5) );
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118 return 0;
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119 }
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120
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121 /* Create a client socket and connect to remote server */
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122 int fd_tcp_client( int *sock, sSA * sa, socklen_t salen )
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123 {
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124 int ret = 0;
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125 int s;
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126
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127 TRACE_ENTRY("%p %p %d", sock, sa, salen);
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128 CHECK_PARAMS( sock && (*sock <= 0) && sa && salen );
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129
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130 /* Create the socket */
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131 CHECK_SYS( s = socket(sa->sa_family, SOCK_STREAM, IPPROTO_TCP) );
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132
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133 /* Set the socket options */
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134 CHECK_FCT( fd_tcp_setsockopt(sa->sa_family, s) );
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135
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136 /* Cleanup if we are cancelled */
191
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137 pthread_cleanup_push(fd_cleanup_socket, &s);
24
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138
bd83ce9328ed Cleanups and completed sctp code (not finished)
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139 /* Try connecting to the remote address */
227
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140 ret = connect(s, sa, salen);
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141
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142 pthread_cleanup_pop(0);
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143
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144 if (ret < 0) {
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145 ret = errno;
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146 LOG_A( "connect returned an error: %s", strerror(ret));
227
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147 CHECK_SYS_DO( close(s), /* continue */ );
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148 *sock = -1;
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149 return ret;
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150 }
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bd83ce9328ed Cleanups and completed sctp code (not finished)
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parents: 23
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151
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parents: 23
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152 /* Done! */
191
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153 *sock = s;
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154 return ret;
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155 }
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parents: 23
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156
23
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parents: 22
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157 /* Get the remote name of a TCP socket */
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parents: 22
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158 int fd_tcp_get_remote_ep(int sock, sSS * ss, socklen_t *sl)
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159 {
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160 TRACE_ENTRY("%d %p %p", sock, ss, sl);
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161 CHECK_PARAMS( ss && sl );
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parents: 22
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162
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parents: 22
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163 *sl = sizeof(sSS);
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parents: 22
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164 CHECK_SYS(getpeername(sock, (sSA *)ss, sl));
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parents: 22
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165
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parents: 22
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166 return 0;
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parents: 22
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167 }
378
41e3c2a3721c Replaced old mechanism to discover local addresses by a call to getifaddrs, lot cleaner!
Sebastien Decugis <sdecugis@nict.go.jp>
parents: 258
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168
"Welcome to our mercurial repository"