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annotate mcabber/libjabber/socket.c @ 946:5c1dfc8e54d7 0.8.0

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Ready for release 0.8.0
author Mikael Berthe <mikael@lilotux.net>
date Sun, 13 Aug 2006 21:01:30 +0200
parents 5f43b532cc37
children
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1 /*
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2 * This program is free software; you can redistribute it and/or modify
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3 * it under the terms of the GNU General Public License as published by
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4 * the Free Software Foundation; either version 2 of the License, or
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5 * (at your option) any later version.
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6 *
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7 * This program is distributed in the hope that it will be useful,
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8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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10 * GNU General Public License for more details.
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11 *
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12 * You should have received a copy of the GNU General Public License
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13 * along with this program; if not, write to the Free Software
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14 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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15 *
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16 * Copyrights
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17 *
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18 * Portions created by or assigned to Jabber.com, Inc. are
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19 * Copyright (c) 1999-2002 Jabber.com, Inc. All Rights Reserved. Contact
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20 * information for Jabber.com, Inc. is available at http://www.jabber.com/.
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21 *
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22 * Portions Copyright (c) 1998-1999 Jeremie Miller.
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23 *
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24 * Acknowledgements
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25 *
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26 * Special thanks to the Jabber Open Source Contributors for their
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27 * suggestions and support of Jabber.
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28 *
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29 */
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30
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31 /**
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32 * @file socket.c
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33 * @brief some misc functions to handle sockets
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34 */
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35
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36 #include "libxode.h"
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37 #include "connwrap.h"
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38
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39 /**
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40 * Simple wrapper to make socket creation easy.
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41 *
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42 * @param port port number of the socket
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43 * @param host hostname where to connect to or listen on
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44 * @param type type of socket (NETSOCKET_SERVER, NETSOCKET_CLIENT; or NETSOCKET_UDP)
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45 * @return file handle of the new socket
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46 *
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47 * NETSOCKET_SERVER is local listening socket
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48 * NETSOCKET_CLIENT is connection socket
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49 */
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50 int make_netsocket(u_short port, char *host, int type, int ssl)
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51 {
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52 int s, flag = 1;
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53 struct sockaddr_in sa;
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54 struct in_addr *saddr;
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55 int socket_type;
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56
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57 /* is this a UDP socket or a TCP socket? */
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58 socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;
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59
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60 bzero((void *)&sa,sizeof(struct sockaddr_in));
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61
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62 if((s = socket(AF_INET,socket_type,0)) < 0)
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63 return(-1);
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64 if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)
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65 return(-1);
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66
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67 saddr = make_addr(host);
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68 if(saddr == NULL)
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69 return(-1);
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70 sa.sin_family = AF_INET;
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71 sa.sin_port = htons(port);
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72
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73 if(type == NETSOCKET_SERVER)
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74 {
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75 /* bind to specific address if specified */
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76 if(host != NULL)
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77 sa.sin_addr.s_addr = saddr->s_addr;
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78
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79 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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80 {
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81 close(s);
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82 return(-1);
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83 }
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84 }
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85 if(type == NETSOCKET_CLIENT)
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86 {
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87 sa.sin_addr.s_addr = saddr->s_addr;
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88 if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)
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89 {
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90 close(s);
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91 return(-1);
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92 }
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93 }
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94 if(type == NETSOCKET_UDP)
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95 {
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96 /* bind to all addresses for now */
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97 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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98 {
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99 close(s);
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100 return(-1);
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101 }
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102
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103 /* specify default recipient for read/write */
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104 sa.sin_addr.s_addr = saddr->s_addr;
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105 if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)
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106 {
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107 close(s);
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108 return(-1);
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109 }
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110 }
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111
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112
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113 return(s);
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114 }
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115
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116 void change_socket_to_blocking(int s)
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117 /* make socket blocking */
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118 {
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119 int val;
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120 val = fcntl(s, F_GETFL, 0);
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121 fcntl(s, F_SETFL, val & (~O_NONBLOCK));
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122 }
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123
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124 void change_socket_to_nonblocking(int s)
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125 /* make socket non-blocking */
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126 {
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127 int val;
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128 val = fcntl(s, F_GETFL, 0);
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129 fcntl(s, F_SETFL, val | O_NONBLOCK);
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130 }
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131
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132 /* socket.c
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133 *
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134 * Simple wrapper to make non-blocking client socket creation easy.
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135 * type = NETSOCKET_SERVER is local listening socket
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136 * type = NETSOCKET_CLIENT is connection socket
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137 * type = NETSOCKET_UDP
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138 */
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139
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140 int make_nb_netsocket(u_short port, char *host, int type, int ssl, int* state)
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141 {
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142 int s, flag = 1;
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143 struct sockaddr_in sa;
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144 struct in_addr *saddr;
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145 int socket_type;
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146
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147 /* is this a UDP socket or a TCP socket? */
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148 socket_type = (type == NETSOCKET_UDP)?SOCK_DGRAM:SOCK_STREAM;
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149
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150 bzero((void *)&sa,sizeof(struct sockaddr_in));
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151
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152 if((s = socket(AF_INET,socket_type,0)) < 0)
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153 return(-1);
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154 if(setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&flag, sizeof(flag)) < 0)
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155 return(-1);
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156 change_socket_to_nonblocking(s);
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157
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158 saddr = make_addr(host);
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159 if(saddr == NULL)
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160 return(-1);
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161 sa.sin_family = AF_INET;
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162 sa.sin_port = htons(port);
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163
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164 if(type == NETSOCKET_SERVER)
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165 {
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166 /* bind to specific address if specified */
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167 if(host != NULL)
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168 sa.sin_addr.s_addr = saddr->s_addr;
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169
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170 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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171 {
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172 close(s);
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173 return(-1);
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174 }
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175 }
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176 if(type == NETSOCKET_CLIENT)
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177 {
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178 int rc;
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179 sa.sin_addr.s_addr = saddr->s_addr;
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180 rc = cw_nb_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl, state);
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181 if (rc == -1 )
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182 {
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183 close(s);
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184 return(-1);
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185 }
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186 }
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187 if(type == NETSOCKET_UDP)
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188 {
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189 /* bind to all addresses for now */
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190 if(bind(s,(struct sockaddr*)&sa,sizeof sa) < 0)
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191 {
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192 close(s);
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193 return(-1);
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194 }
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195
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196 /* specify default recipient for read/write */
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197 sa.sin_addr.s_addr = saddr->s_addr;
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198 if(cw_connect(s,(struct sockaddr*)&sa,sizeof sa,ssl) < 0)
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199 {
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200 close(s);
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201 return(-1);
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202 }
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203 }
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204
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205
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206 return(s);
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207 }
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208
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209 struct in_addr *make_addr(char *host)
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210 {
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211 struct hostent *hp;
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212 static struct in_addr addr;
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213 char myname[MAXHOSTNAMELEN + 1];
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214
417
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215 if (host == NULL || strlen(host) == 0) {
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216 gethostname(myname,MAXHOSTNAMELEN);
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217 hp = gethostbyname(myname);
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218 if(hp != NULL) {
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219 return (struct in_addr *) *hp->h_addr_list;
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220 }
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221 } else {
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222 addr.s_addr = inet_addr(host);
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223 if(addr.s_addr != (in_addr_t)-1) {
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224 return &addr;
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225 }
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226 hp = gethostbyname(host);
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227 if(hp != NULL) {
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228 return (struct in_addr *) *hp->h_addr_list;
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229 }
25
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230 }
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231 return NULL;
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232 }
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233
417
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234 /**
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235 * Sets a file descriptor to close on exec.
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236 *
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237 * @param fd the file descriptor
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238 * @param flag 1 to close on exec, 0 to leave open across exec
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239 *
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240 * @deprecated this function is not used by jabberd14 and might be removed in future versions
25
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241 */
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242 int set_fd_close_on_exec(int fd, int flag)
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243 {
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244 int oldflags = fcntl(fd,F_GETFL);
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245 int newflags;
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246
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247 if(flag)
417
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248 newflags = oldflags | FD_CLOEXEC;
25
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249 else
417
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250 newflags = oldflags & (~FD_CLOEXEC);
25
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251
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252 if(newflags==oldflags)
417
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253 return 0;
25
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254 return fcntl(fd,F_SETFL,(long)newflags);
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255 }
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256