1 | /***************************************************************************
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2 | * _ _ ____ _
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3 | * Project ___| | | | _ \| |
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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 | * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 | *
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10 | * This software is licensed as described in the file COPYING, which
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11 | * you should have received as part of this distribution. The terms
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12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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13 | *
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14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 | * copies of the Software, and permit persons to whom the Software is
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16 | * furnished to do so, under the terms of the COPYING file.
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17 | *
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18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 | * KIND, either express or implied.
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20 | *
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21 | ***************************************************************************/
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22 |
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23 | #include "curl_setup.h"
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24 |
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25 | #ifdef HAVE_NETINET_IN_H
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26 | #include <netinet/in.h> /* <netinet/tcp.h> may need it */
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27 | #endif
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28 | #ifdef HAVE_SYS_UN_H
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29 | #include <sys/un.h> /* for sockaddr_un */
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30 | #endif
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31 | #ifdef HAVE_NETINET_TCP_H
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32 | #include <netinet/tcp.h> /* for TCP_NODELAY */
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33 | #endif
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34 | #ifdef HAVE_SYS_IOCTL_H
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35 | #include <sys/ioctl.h>
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36 | #endif
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37 | #ifdef HAVE_NETDB_H
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38 | #include <netdb.h>
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39 | #endif
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40 | #ifdef HAVE_FCNTL_H
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41 | #include <fcntl.h>
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42 | #endif
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43 | #ifdef HAVE_ARPA_INET_H
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44 | #include <arpa/inet.h>
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45 | #endif
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46 |
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47 | #if (defined(HAVE_IOCTL_FIONBIO) && defined(NETWARE))
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48 | #include <sys/filio.h>
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49 | #endif
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50 | #ifdef NETWARE
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51 | #undef in_addr_t
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52 | #define in_addr_t unsigned long
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53 | #endif
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54 | #ifdef __VMS
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55 | #include <in.h>
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56 | #include <inet.h>
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57 | #endif
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58 |
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59 | #include "curl_printf.h"
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60 | #include "urldata.h"
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61 | #include "sendf.h"
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62 | #include "if2ip.h"
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63 | #include "strerror.h"
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64 | #include "connect.h"
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65 | #include "select.h"
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66 | #include "url.h" /* for Curl_safefree() */
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67 | #include "multiif.h"
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68 | #include "sockaddr.h" /* required for Curl_sockaddr_storage */
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69 | #include "inet_ntop.h"
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70 | #include "inet_pton.h"
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71 | #include "vtls/vtls.h" /* for Curl_ssl_check_cxn() */
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72 | #include "progress.h"
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73 | #include "warnless.h"
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74 | #include "conncache.h"
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75 | #include "multihandle.h"
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76 |
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77 | /* The last #include files should be: */
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78 | #include "curl_memory.h"
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79 | #include "memdebug.h"
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80 |
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81 | #ifdef __SYMBIAN32__
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82 | /* This isn't actually supported under Symbian OS */
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83 | #undef SO_NOSIGPIPE
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84 | #endif
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85 |
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86 | static bool verifyconnect(curl_socket_t sockfd, int *error);
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87 |
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88 | #if defined(__DragonFly__) || defined(HAVE_WINSOCK_H)
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89 | /* DragonFlyBSD and Windows use millisecond units */
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90 | #define KEEPALIVE_FACTOR(x) (x *= 1000)
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91 | #else
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92 | #define KEEPALIVE_FACTOR(x)
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93 | #endif
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94 |
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95 | #if defined(HAVE_WINSOCK2_H) && !defined(SIO_KEEPALIVE_VALS)
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96 | #define SIO_KEEPALIVE_VALS _WSAIOW(IOC_VENDOR,4)
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97 |
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98 | struct tcp_keepalive {
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99 | u_long onoff;
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100 | u_long keepalivetime;
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101 | u_long keepaliveinterval;
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102 | };
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103 | #endif
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104 |
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105 | static void
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106 | tcpkeepalive(struct SessionHandle *data,
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107 | curl_socket_t sockfd)
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108 | {
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109 | int optval = data->set.tcp_keepalive?1:0;
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110 |
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111 | /* only set IDLE and INTVL if setting KEEPALIVE is successful */
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112 | if(setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,
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113 | (void *)&optval, sizeof(optval)) < 0) {
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114 | infof(data, "Failed to set SO_KEEPALIVE on fd %d\n", sockfd);
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115 | }
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116 | else {
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117 | #if defined(SIO_KEEPALIVE_VALS)
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118 | struct tcp_keepalive vals;
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119 | DWORD dummy;
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120 | vals.onoff = 1;
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121 | optval = curlx_sltosi(data->set.tcp_keepidle);
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122 | KEEPALIVE_FACTOR(optval);
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123 | vals.keepalivetime = optval;
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124 | optval = curlx_sltosi(data->set.tcp_keepintvl);
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125 | KEEPALIVE_FACTOR(optval);
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126 | vals.keepaliveinterval = optval;
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127 | if(WSAIoctl(sockfd, SIO_KEEPALIVE_VALS, (LPVOID) &vals, sizeof(vals),
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128 | NULL, 0, &dummy, NULL, NULL) != 0) {
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129 | infof(data, "Failed to set SIO_KEEPALIVE_VALS on fd %d: %d\n",
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130 | (int)sockfd, WSAGetLastError());
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131 | }
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132 | #else
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133 | #ifdef TCP_KEEPIDLE
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134 | optval = curlx_sltosi(data->set.tcp_keepidle);
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135 | KEEPALIVE_FACTOR(optval);
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136 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE,
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137 | (void *)&optval, sizeof(optval)) < 0) {
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138 | infof(data, "Failed to set TCP_KEEPIDLE on fd %d\n", sockfd);
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139 | }
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140 | #endif
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141 | #ifdef TCP_KEEPINTVL
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142 | optval = curlx_sltosi(data->set.tcp_keepintvl);
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143 | KEEPALIVE_FACTOR(optval);
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144 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL,
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145 | (void *)&optval, sizeof(optval)) < 0) {
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146 | infof(data, "Failed to set TCP_KEEPINTVL on fd %d\n", sockfd);
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147 | }
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148 | #endif
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149 | #ifdef TCP_KEEPALIVE
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150 | /* Mac OS X style */
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151 | optval = curlx_sltosi(data->set.tcp_keepidle);
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152 | KEEPALIVE_FACTOR(optval);
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153 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE,
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154 | (void *)&optval, sizeof(optval)) < 0) {
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155 | infof(data, "Failed to set TCP_KEEPALIVE on fd %d\n", sockfd);
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156 | }
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157 | #endif
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158 | #endif
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159 | }
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160 | }
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161 |
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162 | static CURLcode
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163 | singleipconnect(struct connectdata *conn,
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164 | const Curl_addrinfo *ai, /* start connecting to this */
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165 | curl_socket_t *sock);
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166 |
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167 | /*
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168 | * Curl_timeleft() returns the amount of milliseconds left allowed for the
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169 | * transfer/connection. If the value is negative, the timeout time has already
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170 | * elapsed.
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171 | *
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172 | * The start time is stored in progress.t_startsingle - as set with
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173 | * Curl_pgrsTime(..., TIMER_STARTSINGLE);
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174 | *
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175 | * If 'nowp' is non-NULL, it points to the current time.
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176 | * 'duringconnect' is FALSE if not during a connect, as then of course the
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177 | * connect timeout is not taken into account!
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178 | *
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179 | * @unittest: 1303
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180 | */
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181 | long Curl_timeleft(struct SessionHandle *data,
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182 | struct timeval *nowp,
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183 | bool duringconnect)
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184 | {
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185 | int timeout_set = 0;
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186 | long timeout_ms = duringconnect?DEFAULT_CONNECT_TIMEOUT:0;
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187 | struct timeval now;
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188 |
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189 | /* if a timeout is set, use the most restrictive one */
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190 |
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191 | if(data->set.timeout > 0)
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192 | timeout_set |= 1;
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193 | if(duringconnect && (data->set.connecttimeout > 0))
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194 | timeout_set |= 2;
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195 |
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196 | switch (timeout_set) {
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197 | case 1:
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198 | timeout_ms = data->set.timeout;
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199 | break;
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200 | case 2:
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201 | timeout_ms = data->set.connecttimeout;
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202 | break;
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203 | case 3:
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204 | if(data->set.timeout < data->set.connecttimeout)
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205 | timeout_ms = data->set.timeout;
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206 | else
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207 | timeout_ms = data->set.connecttimeout;
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208 | break;
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209 | default:
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210 | /* use the default */
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211 | if(!duringconnect)
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212 | /* if we're not during connect, there's no default timeout so if we're
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213 | at zero we better just return zero and not make it a negative number
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214 | by the math below */
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215 | return 0;
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216 | break;
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217 | }
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218 |
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219 | if(!nowp) {
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220 | now = Curl_tvnow();
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221 | nowp = &now;
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222 | }
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223 |
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224 | /* subtract elapsed time */
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225 | if(duringconnect)
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226 | /* since this most recent connect started */
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227 | timeout_ms -= Curl_tvdiff(*nowp, data->progress.t_startsingle);
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228 | else
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229 | /* since the entire operation started */
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230 | timeout_ms -= Curl_tvdiff(*nowp, data->progress.t_startop);
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231 | if(!timeout_ms)
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232 | /* avoid returning 0 as that means no timeout! */
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233 | return -1;
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234 |
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235 | return timeout_ms;
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236 | }
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237 |
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238 | static CURLcode bindlocal(struct connectdata *conn,
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239 | curl_socket_t sockfd, int af, unsigned int scope)
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240 | {
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241 | struct SessionHandle *data = conn->data;
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242 |
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243 | struct Curl_sockaddr_storage sa;
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244 | struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
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245 | curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
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246 | struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
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247 | #ifdef ENABLE_IPV6
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248 | struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
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249 | #endif
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250 |
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251 | struct Curl_dns_entry *h=NULL;
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252 | unsigned short port = data->set.localport; /* use this port number, 0 for
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253 | "random" */
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254 | /* how many port numbers to try to bind to, increasing one at a time */
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255 | int portnum = data->set.localportrange;
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256 | const char *dev = data->set.str[STRING_DEVICE];
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257 | int error;
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258 |
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259 | /*************************************************************
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260 | * Select device to bind socket to
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261 | *************************************************************/
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262 | if(!dev && !port)
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263 | /* no local kind of binding was requested */
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264 | return CURLE_OK;
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265 |
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266 | memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
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267 |
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268 | if(dev && (strlen(dev)<255) ) {
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269 | char myhost[256] = "";
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270 | int done = 0; /* -1 for error, 1 for address found */
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271 | bool is_interface = FALSE;
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272 | bool is_host = FALSE;
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273 | static const char *if_prefix = "if!";
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274 | static const char *host_prefix = "host!";
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275 |
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276 | if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
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277 | dev += strlen(if_prefix);
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278 | is_interface = TRUE;
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279 | }
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280 | else if(strncmp(host_prefix, dev, strlen(host_prefix)) == 0) {
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281 | dev += strlen(host_prefix);
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282 | is_host = TRUE;
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283 | }
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284 |
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285 | /* interface */
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286 | if(!is_host) {
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287 | switch(Curl_if2ip(af, scope, conn->scope_id, dev,
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288 | myhost, sizeof(myhost))) {
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289 | case IF2IP_NOT_FOUND:
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290 | if(is_interface) {
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291 | /* Do not fall back to treating it as a host name */
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292 | failf(data, "Couldn't bind to interface '%s'", dev);
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293 | return CURLE_INTERFACE_FAILED;
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294 | }
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295 | break;
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296 | case IF2IP_AF_NOT_SUPPORTED:
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297 | /* Signal the caller to try another address family if available */
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298 | return CURLE_UNSUPPORTED_PROTOCOL;
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299 | case IF2IP_FOUND:
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300 | is_interface = TRUE;
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301 | /*
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302 | * We now have the numerical IP address in the 'myhost' buffer
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303 | */
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304 | infof(data, "Local Interface %s is ip %s using address family %i\n",
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305 | dev, myhost, af);
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306 | done = 1;
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307 |
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308 | #ifdef SO_BINDTODEVICE
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309 | /* I am not sure any other OSs than Linux that provide this feature,
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310 | * and at the least I cannot test. --Ben
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311 | *
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312 | * This feature allows one to tightly bind the local socket to a
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313 | * particular interface. This will force even requests to other
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314 | * local interfaces to go out the external interface.
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315 | *
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316 | *
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317 | * Only bind to the interface when specified as interface, not just
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318 | * as a hostname or ip address.
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319 | */
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320 | if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
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321 | dev, (curl_socklen_t)strlen(dev)+1) != 0) {
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322 | error = SOCKERRNO;
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323 | infof(data, "SO_BINDTODEVICE %s failed with errno %d: %s;"
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324 | " will do regular bind\n",
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325 | dev, error, Curl_strerror(conn, error));
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326 | /* This is typically "errno 1, error: Operation not permitted" if
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327 | you're not running as root or another suitable privileged
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328 | user */
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329 | }
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330 | #endif
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331 | break;
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332 | }
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333 | }
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334 | if(!is_interface) {
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335 | /*
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336 | * This was not an interface, resolve the name as a host name
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337 | * or IP number
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338 | *
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339 | * Temporarily force name resolution to use only the address type
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340 | * of the connection. The resolve functions should really be changed
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341 | * to take a type parameter instead.
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342 | */
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343 | long ipver = conn->ip_version;
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344 | int rc;
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345 |
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346 | if(af == AF_INET)
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347 | conn->ip_version = CURL_IPRESOLVE_V4;
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348 | #ifdef ENABLE_IPV6
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349 | else if(af == AF_INET6)
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350 | conn->ip_version = CURL_IPRESOLVE_V6;
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351 | #endif
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352 |
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353 | rc = Curl_resolv(conn, dev, 0, &h);
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354 | if(rc == CURLRESOLV_PENDING)
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355 | (void)Curl_resolver_wait_resolv(conn, &h);
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356 | conn->ip_version = ipver;
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357 |
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358 | if(h) {
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359 | /* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
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360 | Curl_printable_address(h->addr, myhost, sizeof(myhost));
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361 | infof(data, "Name '%s' family %i resolved to '%s' family %i\n",
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362 | dev, af, myhost, h->addr->ai_family);
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363 | Curl_resolv_unlock(data, h);
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364 | done = 1;
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365 | }
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366 | else {
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367 | /*
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368 | * provided dev was no interface (or interfaces are not supported
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369 | * e.g. solaris) no ip address and no domain we fail here
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370 | */
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371 | done = -1;
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372 | }
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373 | }
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374 |
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375 | if(done > 0) {
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376 | #ifdef ENABLE_IPV6
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377 | /* IPv6 address */
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378 | if(af == AF_INET6) {
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379 | #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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380 | char *scope_ptr = strchr(myhost, '%');
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381 | if(scope_ptr)
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382 | *(scope_ptr++) = 0;
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383 | #endif
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384 | if(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0) {
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385 | si6->sin6_family = AF_INET6;
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386 | si6->sin6_port = htons(port);
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387 | #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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388 | if(scope_ptr)
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389 | /* The "myhost" string either comes from Curl_if2ip or from
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390 | Curl_printable_address. The latter returns only numeric scope
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391 | IDs and the former returns none at all. So the scope ID, if
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392 | present, is known to be numeric */
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393 | si6->sin6_scope_id = atoi(scope_ptr);
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394 | #endif
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395 | }
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396 | sizeof_sa = sizeof(struct sockaddr_in6);
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397 | }
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398 | else
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399 | #endif
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400 | /* IPv4 address */
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401 | if((af == AF_INET) &&
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402 | (Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
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403 | si4->sin_family = AF_INET;
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404 | si4->sin_port = htons(port);
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405 | sizeof_sa = sizeof(struct sockaddr_in);
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406 | }
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407 | }
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408 |
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409 | if(done < 1) {
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410 | failf(data, "Couldn't bind to '%s'", dev);
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411 | return CURLE_INTERFACE_FAILED;
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412 | }
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413 | }
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414 | else {
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415 | /* no device was given, prepare sa to match af's needs */
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416 | #ifdef ENABLE_IPV6
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417 | if(af == AF_INET6) {
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418 | si6->sin6_family = AF_INET6;
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419 | si6->sin6_port = htons(port);
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420 | sizeof_sa = sizeof(struct sockaddr_in6);
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421 | }
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422 | else
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423 | #endif
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424 | if(af == AF_INET) {
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425 | si4->sin_family = AF_INET;
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426 | si4->sin_port = htons(port);
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427 | sizeof_sa = sizeof(struct sockaddr_in);
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428 | }
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429 | }
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430 |
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431 | for(;;) {
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432 | if(bind(sockfd, sock, sizeof_sa) >= 0) {
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433 | /* we succeeded to bind */
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434 | struct Curl_sockaddr_storage add;
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435 | curl_socklen_t size = sizeof(add);
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436 | memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
|
---|
437 | if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
|
---|
438 | data->state.os_errno = error = SOCKERRNO;
|
---|
439 | failf(data, "getsockname() failed with errno %d: %s",
|
---|
440 | error, Curl_strerror(conn, error));
|
---|
441 | return CURLE_INTERFACE_FAILED;
|
---|
442 | }
|
---|
443 | infof(data, "Local port: %hu\n", port);
|
---|
444 | conn->bits.bound = TRUE;
|
---|
445 | return CURLE_OK;
|
---|
446 | }
|
---|
447 |
|
---|
448 | if(--portnum > 0) {
|
---|
449 | infof(data, "Bind to local port %hu failed, trying next\n", port);
|
---|
450 | port++; /* try next port */
|
---|
451 | /* We re-use/clobber the port variable here below */
|
---|
452 | if(sock->sa_family == AF_INET)
|
---|
453 | si4->sin_port = ntohs(port);
|
---|
454 | #ifdef ENABLE_IPV6
|
---|
455 | else
|
---|
456 | si6->sin6_port = ntohs(port);
|
---|
457 | #endif
|
---|
458 | }
|
---|
459 | else
|
---|
460 | break;
|
---|
461 | }
|
---|
462 |
|
---|
463 | data->state.os_errno = error = SOCKERRNO;
|
---|
464 | failf(data, "bind failed with errno %d: %s",
|
---|
465 | error, Curl_strerror(conn, error));
|
---|
466 |
|
---|
467 | return CURLE_INTERFACE_FAILED;
|
---|
468 | }
|
---|
469 |
|
---|
470 | /*
|
---|
471 | * verifyconnect() returns TRUE if the connect really has happened.
|
---|
472 | */
|
---|
473 | static bool verifyconnect(curl_socket_t sockfd, int *error)
|
---|
474 | {
|
---|
475 | bool rc = TRUE;
|
---|
476 | #ifdef SO_ERROR
|
---|
477 | int err = 0;
|
---|
478 | curl_socklen_t errSize = sizeof(err);
|
---|
479 |
|
---|
480 | #if 0//def WIN32
|
---|
481 | /*
|
---|
482 | * In October 2003 we effectively nullified this function on Windows due to
|
---|
483 | * problems with it using all CPU in multi-threaded cases.
|
---|
484 | *
|
---|
485 | * In May 2004, we bring it back to offer more info back on connect failures.
|
---|
486 | * Gisle Vanem could reproduce the former problems with this function, but
|
---|
487 | * could avoid them by adding this SleepEx() call below:
|
---|
488 | *
|
---|
489 | * "I don't have Rational Quantify, but the hint from his post was
|
---|
490 | * ntdll::NtRemoveIoCompletion(). So I'd assume the SleepEx (or maybe
|
---|
491 | * just Sleep(0) would be enough?) would release whatever
|
---|
492 | * mutex/critical-section the ntdll call is waiting on.
|
---|
493 | *
|
---|
494 | * Someone got to verify this on Win-NT 4.0, 2000."
|
---|
495 | */
|
---|
496 |
|
---|
497 | #ifdef _WIN32_WCE
|
---|
498 | Sleep(0);
|
---|
499 | #else
|
---|
500 | SleepEx(0, FALSE);
|
---|
501 | #endif
|
---|
502 |
|
---|
503 | #endif
|
---|
504 |
|
---|
505 | if(0 != getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (void *)&err, &errSize))
|
---|
506 | err = SOCKERRNO;
|
---|
507 | #ifdef _WIN32_WCE
|
---|
508 | /* Old WinCE versions don't support SO_ERROR */
|
---|
509 | if(WSAENOPROTOOPT == err) {
|
---|
510 | SET_SOCKERRNO(0);
|
---|
511 | err = 0;
|
---|
512 | }
|
---|
513 | #endif
|
---|
514 | #ifdef __minix
|
---|
515 | /* Minix 3.1.x doesn't support getsockopt on UDP sockets */
|
---|
516 | if(EBADIOCTL == err) {
|
---|
517 | SET_SOCKERRNO(0);
|
---|
518 | err = 0;
|
---|
519 | }
|
---|
520 | #endif
|
---|
521 | if((0 == err) || (EISCONN == err))
|
---|
522 | /* we are connected, awesome! */
|
---|
523 | rc = TRUE;
|
---|
524 | else
|
---|
525 | /* This wasn't a successful connect */
|
---|
526 | rc = FALSE;
|
---|
527 | if(error)
|
---|
528 | *error = err;
|
---|
529 | #else
|
---|
530 | (void)sockfd;
|
---|
531 | if(error)
|
---|
532 | *error = SOCKERRNO;
|
---|
533 | #endif
|
---|
534 | return rc;
|
---|
535 | }
|
---|
536 |
|
---|
537 | /* Used within the multi interface. Try next IP address, return TRUE if no
|
---|
538 | more address exists or error */
|
---|
539 | static CURLcode trynextip(struct connectdata *conn,
|
---|
540 | int sockindex,
|
---|
541 | int tempindex)
|
---|
542 | {
|
---|
543 | const int other = tempindex ^ 1;
|
---|
544 | CURLcode result = CURLE_COULDNT_CONNECT;
|
---|
545 |
|
---|
546 | /* First clean up after the failed socket.
|
---|
547 | Don't close it yet to ensure that the next IP's socket gets a different
|
---|
548 | file descriptor, which can prevent bugs when the curl_multi_socket_action
|
---|
549 | interface is used with certain select() replacements such as kqueue. */
|
---|
550 | curl_socket_t fd_to_close = conn->tempsock[tempindex];
|
---|
551 | conn->tempsock[tempindex] = CURL_SOCKET_BAD;
|
---|
552 |
|
---|
553 | if(sockindex == FIRSTSOCKET) {
|
---|
554 | Curl_addrinfo *ai = NULL;
|
---|
555 | int family = AF_UNSPEC;
|
---|
556 |
|
---|
557 | if(conn->tempaddr[tempindex]) {
|
---|
558 | /* find next address in the same protocol family */
|
---|
559 | family = conn->tempaddr[tempindex]->ai_family;
|
---|
560 | ai = conn->tempaddr[tempindex]->ai_next;
|
---|
561 | }
|
---|
562 | #ifdef ENABLE_IPV6
|
---|
563 | else if(conn->tempaddr[0]) {
|
---|
564 | /* happy eyeballs - try the other protocol family */
|
---|
565 | int firstfamily = conn->tempaddr[0]->ai_family;
|
---|
566 | family = (firstfamily == AF_INET) ? AF_INET6 : AF_INET;
|
---|
567 | ai = conn->tempaddr[0]->ai_next;
|
---|
568 | }
|
---|
569 | #endif
|
---|
570 |
|
---|
571 | while(ai) {
|
---|
572 | if(conn->tempaddr[other]) {
|
---|
573 | /* we can safely skip addresses of the other protocol family */
|
---|
574 | while(ai && ai->ai_family != family)
|
---|
575 | ai = ai->ai_next;
|
---|
576 | }
|
---|
577 |
|
---|
578 | if(ai) {
|
---|
579 | result = singleipconnect(conn, ai, &conn->tempsock[tempindex]);
|
---|
580 | if(result == CURLE_COULDNT_CONNECT) {
|
---|
581 | ai = ai->ai_next;
|
---|
582 | continue;
|
---|
583 | }
|
---|
584 |
|
---|
585 | conn->tempaddr[tempindex] = ai;
|
---|
586 | }
|
---|
587 | break;
|
---|
588 | }
|
---|
589 | }
|
---|
590 |
|
---|
591 | if(fd_to_close != CURL_SOCKET_BAD)
|
---|
592 | Curl_closesocket(conn, fd_to_close);
|
---|
593 |
|
---|
594 | return result;
|
---|
595 | }
|
---|
596 |
|
---|
597 | /* Copies connection info into the session handle to make it available
|
---|
598 | when the session handle is no longer associated with a connection. */
|
---|
599 | void Curl_persistconninfo(struct connectdata *conn)
|
---|
600 | {
|
---|
601 | memcpy(conn->data->info.conn_primary_ip, conn->primary_ip, MAX_IPADR_LEN);
|
---|
602 | memcpy(conn->data->info.conn_local_ip, conn->local_ip, MAX_IPADR_LEN);
|
---|
603 | conn->data->info.conn_primary_port = conn->primary_port;
|
---|
604 | conn->data->info.conn_local_port = conn->local_port;
|
---|
605 | }
|
---|
606 |
|
---|
607 | /* retrieves ip address and port from a sockaddr structure */
|
---|
608 | static bool getaddressinfo(struct sockaddr* sa, char* addr,
|
---|
609 | long* port)
|
---|
610 | {
|
---|
611 | unsigned short us_port;
|
---|
612 | struct sockaddr_in* si = NULL;
|
---|
613 | #ifdef ENABLE_IPV6
|
---|
614 | struct sockaddr_in6* si6 = NULL;
|
---|
615 | #endif
|
---|
616 | #if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
|
---|
617 | struct sockaddr_un* su = NULL;
|
---|
618 | #endif
|
---|
619 |
|
---|
620 | switch (sa->sa_family) {
|
---|
621 | case AF_INET:
|
---|
622 | si = (struct sockaddr_in*)(void*) sa;
|
---|
623 | if(Curl_inet_ntop(sa->sa_family, &si->sin_addr,
|
---|
624 | addr, MAX_IPADR_LEN)) {
|
---|
625 | us_port = ntohs(si->sin_port);
|
---|
626 | *port = us_port;
|
---|
627 | return TRUE;
|
---|
628 | }
|
---|
629 | break;
|
---|
630 | #ifdef ENABLE_IPV6
|
---|
631 | case AF_INET6:
|
---|
632 | si6 = (struct sockaddr_in6*)(void*) sa;
|
---|
633 | if(Curl_inet_ntop(sa->sa_family, &si6->sin6_addr,
|
---|
634 | addr, MAX_IPADR_LEN)) {
|
---|
635 | us_port = ntohs(si6->sin6_port);
|
---|
636 | *port = us_port;
|
---|
637 | return TRUE;
|
---|
638 | }
|
---|
639 | break;
|
---|
640 | #endif
|
---|
641 | #if defined(HAVE_SYS_UN_H) && defined(AF_UNIX)
|
---|
642 | case AF_UNIX:
|
---|
643 | su = (struct sockaddr_un*)sa;
|
---|
644 | snprintf(addr, MAX_IPADR_LEN, "%s", su->sun_path);
|
---|
645 | *port = 0;
|
---|
646 | return TRUE;
|
---|
647 | #endif
|
---|
648 | default:
|
---|
649 | break;
|
---|
650 | }
|
---|
651 |
|
---|
652 | addr[0] = '\0';
|
---|
653 | *port = 0;
|
---|
654 |
|
---|
655 | return FALSE;
|
---|
656 | }
|
---|
657 |
|
---|
658 | /* retrieves the start/end point information of a socket of an established
|
---|
659 | connection */
|
---|
660 | void Curl_updateconninfo(struct connectdata *conn, curl_socket_t sockfd)
|
---|
661 | {
|
---|
662 | curl_socklen_t len;
|
---|
663 | struct Curl_sockaddr_storage ssrem;
|
---|
664 | struct Curl_sockaddr_storage ssloc;
|
---|
665 | struct SessionHandle *data = conn->data;
|
---|
666 |
|
---|
667 | if(conn->socktype == SOCK_DGRAM)
|
---|
668 | /* there's no connection! */
|
---|
669 | return;
|
---|
670 |
|
---|
671 | if(!conn->bits.reuse) {
|
---|
672 | int error;
|
---|
673 |
|
---|
674 | len = sizeof(struct Curl_sockaddr_storage);
|
---|
675 | if(getpeername(sockfd, (struct sockaddr*) &ssrem, &len)) {
|
---|
676 | error = SOCKERRNO;
|
---|
677 | failf(data, "getpeername() failed with errno %d: %s",
|
---|
678 | error, Curl_strerror(conn, error));
|
---|
679 | return;
|
---|
680 | }
|
---|
681 |
|
---|
682 | len = sizeof(struct Curl_sockaddr_storage);
|
---|
683 | memset(&ssloc, 0, sizeof(ssloc));
|
---|
684 | if(getsockname(sockfd, (struct sockaddr*) &ssloc, &len)) {
|
---|
685 | error = SOCKERRNO;
|
---|
686 | failf(data, "getsockname() failed with errno %d: %s",
|
---|
687 | error, Curl_strerror(conn, error));
|
---|
688 | return;
|
---|
689 | }
|
---|
690 |
|
---|
691 | if(!getaddressinfo((struct sockaddr*)&ssrem,
|
---|
692 | conn->primary_ip, &conn->primary_port)) {
|
---|
693 | error = ERRNO;
|
---|
694 | failf(data, "ssrem inet_ntop() failed with errno %d: %s",
|
---|
695 | error, Curl_strerror(conn, error));
|
---|
696 | return;
|
---|
697 | }
|
---|
698 | memcpy(conn->ip_addr_str, conn->primary_ip, MAX_IPADR_LEN);
|
---|
699 |
|
---|
700 | if(!getaddressinfo((struct sockaddr*)&ssloc,
|
---|
701 | conn->local_ip, &conn->local_port)) {
|
---|
702 | error = ERRNO;
|
---|
703 | failf(data, "ssloc inet_ntop() failed with errno %d: %s",
|
---|
704 | error, Curl_strerror(conn, error));
|
---|
705 | return;
|
---|
706 | }
|
---|
707 |
|
---|
708 | }
|
---|
709 |
|
---|
710 | /* persist connection info in session handle */
|
---|
711 | Curl_persistconninfo(conn);
|
---|
712 | }
|
---|
713 |
|
---|
714 | /*
|
---|
715 | * Curl_is_connected() checks if the socket has connected.
|
---|
716 | */
|
---|
717 |
|
---|
718 | CURLcode Curl_is_connected(struct connectdata *conn,
|
---|
719 | int sockindex,
|
---|
720 | bool *connected)
|
---|
721 | {
|
---|
722 | struct SessionHandle *data = conn->data;
|
---|
723 | CURLcode result = CURLE_OK;
|
---|
724 | long allow;
|
---|
725 | int error = 0;
|
---|
726 | struct timeval now;
|
---|
727 | int rc;
|
---|
728 | int i;
|
---|
729 |
|
---|
730 | DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
|
---|
731 |
|
---|
732 | *connected = FALSE; /* a very negative world view is best */
|
---|
733 |
|
---|
734 | if(conn->bits.tcpconnect[sockindex]) {
|
---|
735 | /* we are connected already! */
|
---|
736 | *connected = TRUE;
|
---|
737 | return CURLE_OK;
|
---|
738 | }
|
---|
739 |
|
---|
740 | now = Curl_tvnow();
|
---|
741 |
|
---|
742 | /* figure out how long time we have left to connect */
|
---|
743 | allow = Curl_timeleft(data, &now, TRUE);
|
---|
744 |
|
---|
745 | if(allow < 0) {
|
---|
746 | /* time-out, bail out, go home */
|
---|
747 | failf(data, "Connection time-out");
|
---|
748 | return CURLE_OPERATION_TIMEDOUT;
|
---|
749 | }
|
---|
750 |
|
---|
751 | for(i=0; i<2; i++) {
|
---|
752 | const int other = i ^ 1;
|
---|
753 | if(conn->tempsock[i] == CURL_SOCKET_BAD)
|
---|
754 | continue;
|
---|
755 |
|
---|
756 | #ifdef mpeix
|
---|
757 | /* Call this function once now, and ignore the results. We do this to
|
---|
758 | "clear" the error state on the socket so that we can later read it
|
---|
759 | reliably. This is reported necessary on the MPE/iX operating system. */
|
---|
760 | (void)verifyconnect(conn->tempsock[i], NULL);
|
---|
761 | #endif
|
---|
762 |
|
---|
763 | /* check socket for connect */
|
---|
764 | rc = Curl_socket_ready(CURL_SOCKET_BAD, conn->tempsock[i], 0);
|
---|
765 |
|
---|
766 | if(rc == 0) { /* no connection yet */
|
---|
767 | if(curlx_tvdiff(now, conn->connecttime) >= conn->timeoutms_per_addr) {
|
---|
768 | infof(data, "After %ldms connect time, move on!\n",
|
---|
769 | conn->timeoutms_per_addr);
|
---|
770 | error = ETIMEDOUT;
|
---|
771 | }
|
---|
772 |
|
---|
773 | /* should we try another protocol family? */
|
---|
774 | if(i == 0 && conn->tempaddr[1] == NULL &&
|
---|
775 | curlx_tvdiff(now, conn->connecttime) >= HAPPY_EYEBALLS_TIMEOUT) {
|
---|
776 | trynextip(conn, sockindex, 1);
|
---|
777 | }
|
---|
778 | }
|
---|
779 | else if(rc == CURL_CSELECT_OUT) {
|
---|
780 | if(verifyconnect(conn->tempsock[i], &error)) {
|
---|
781 | /* we are connected with TCP, awesome! */
|
---|
782 |
|
---|
783 | /* use this socket from now on */
|
---|
784 | conn->sock[sockindex] = conn->tempsock[i];
|
---|
785 | conn->ip_addr = conn->tempaddr[i];
|
---|
786 | conn->tempsock[i] = CURL_SOCKET_BAD;
|
---|
787 |
|
---|
788 | /* close the other socket, if open */
|
---|
789 | if(conn->tempsock[other] != CURL_SOCKET_BAD) {
|
---|
790 | Curl_closesocket(conn, conn->tempsock[other]);
|
---|
791 | conn->tempsock[other] = CURL_SOCKET_BAD;
|
---|
792 | }
|
---|
793 |
|
---|
794 | /* see if we need to do any proxy magic first once we connected */
|
---|
795 | result = Curl_connected_proxy(conn, sockindex);
|
---|
796 | if(result)
|
---|
797 | return result;
|
---|
798 |
|
---|
799 | conn->bits.tcpconnect[sockindex] = TRUE;
|
---|
800 |
|
---|
801 | *connected = TRUE;
|
---|
802 | if(sockindex == FIRSTSOCKET)
|
---|
803 | Curl_pgrsTime(data, TIMER_CONNECT); /* connect done */
|
---|
804 | Curl_updateconninfo(conn, conn->sock[sockindex]);
|
---|
805 | Curl_verboseconnect(conn);
|
---|
806 |
|
---|
807 | return CURLE_OK;
|
---|
808 | }
|
---|
809 | else
|
---|
810 | infof(data, "Connection failed\n");
|
---|
811 | }
|
---|
812 | else if(rc & CURL_CSELECT_ERR)
|
---|
813 | (void)verifyconnect(conn->tempsock[i], &error);
|
---|
814 |
|
---|
815 | /*
|
---|
816 | * The connection failed here, we should attempt to connect to the "next
|
---|
817 | * address" for the given host. But first remember the latest error.
|
---|
818 | */
|
---|
819 | if(error) {
|
---|
820 | data->state.os_errno = error;
|
---|
821 | SET_SOCKERRNO(error);
|
---|
822 | if(conn->tempaddr[i]) {
|
---|
823 | CURLcode status;
|
---|
824 | char ipaddress[MAX_IPADR_LEN];
|
---|
825 | Curl_printable_address(conn->tempaddr[i], ipaddress, MAX_IPADR_LEN);
|
---|
826 | infof(data, "connect to %s port %ld failed: %s\n",
|
---|
827 | ipaddress, conn->port, Curl_strerror(conn, error));
|
---|
828 |
|
---|
829 | conn->timeoutms_per_addr = conn->tempaddr[i]->ai_next == NULL ?
|
---|
830 | allow : allow / 2;
|
---|
831 |
|
---|
832 | status = trynextip(conn, sockindex, i);
|
---|
833 | if(status != CURLE_COULDNT_CONNECT
|
---|
834 | || conn->tempsock[other] == CURL_SOCKET_BAD)
|
---|
835 | /* the last attempt failed and no other sockets remain open */
|
---|
836 | result = status;
|
---|
837 | }
|
---|
838 | }
|
---|
839 | }
|
---|
840 |
|
---|
841 | if(result) {
|
---|
842 | /* no more addresses to try */
|
---|
843 |
|
---|
844 | /* if the first address family runs out of addresses to try before
|
---|
845 | the happy eyeball timeout, go ahead and try the next family now */
|
---|
846 | if(conn->tempaddr[1] == NULL) {
|
---|
847 | result = trynextip(conn, sockindex, 1);
|
---|
848 | if(!result)
|
---|
849 | return result;
|
---|
850 | }
|
---|
851 |
|
---|
852 | failf(data, "Failed to connect to %s port %ld: %s",
|
---|
853 | conn->bits.proxy?conn->proxy.name:conn->host.name,
|
---|
854 | conn->port, Curl_strerror(conn, error));
|
---|
855 | }
|
---|
856 |
|
---|
857 | return result;
|
---|
858 | }
|
---|
859 |
|
---|
860 | void Curl_tcpnodelay(struct connectdata *conn, curl_socket_t sockfd)
|
---|
861 | {
|
---|
862 | #ifdef TCP_NODELAY
|
---|
863 | struct SessionHandle *data= conn->data;
|
---|
864 | curl_socklen_t onoff = (curl_socklen_t) 1;
|
---|
865 | int level = IPPROTO_TCP;
|
---|
866 |
|
---|
867 | #if 0
|
---|
868 | /* The use of getprotobyname() is disabled since it isn't thread-safe on
|
---|
869 | numerous systems. On these getprotobyname_r() should be used instead, but
|
---|
870 | that exists in at least one 4 arg version and one 5 arg version, and
|
---|
871 | since the proto number rarely changes anyway we now just use the hard
|
---|
872 | coded number. The "proper" fix would need a configure check for the
|
---|
873 | correct function much in the same style the gethostbyname_r versions are
|
---|
874 | detected. */
|
---|
875 | struct protoent *pe = getprotobyname("tcp");
|
---|
876 | if(pe)
|
---|
877 | level = pe->p_proto;
|
---|
878 | #endif
|
---|
879 |
|
---|
880 | if(setsockopt(sockfd, level, TCP_NODELAY, (void *)&onoff,
|
---|
881 | sizeof(onoff)) < 0)
|
---|
882 | infof(data, "Could not set TCP_NODELAY: %s\n",
|
---|
883 | Curl_strerror(conn, SOCKERRNO));
|
---|
884 | else
|
---|
885 | infof(data, "TCP_NODELAY set\n");
|
---|
886 | #else
|
---|
887 | (void)conn;
|
---|
888 | (void)sockfd;
|
---|
889 | #endif
|
---|
890 | }
|
---|
891 |
|
---|
892 | #ifdef SO_NOSIGPIPE
|
---|
893 | /* The preferred method on Mac OS X (10.2 and later) to prevent SIGPIPEs when
|
---|
894 | sending data to a dead peer (instead of relying on the 4th argument to send
|
---|
895 | being MSG_NOSIGNAL). Possibly also existing and in use on other BSD
|
---|
896 | systems? */
|
---|
897 | static void nosigpipe(struct connectdata *conn,
|
---|
898 | curl_socket_t sockfd)
|
---|
899 | {
|
---|
900 | struct SessionHandle *data= conn->data;
|
---|
901 | int onoff = 1;
|
---|
902 | if(setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&onoff,
|
---|
903 | sizeof(onoff)) < 0)
|
---|
904 | infof(data, "Could not set SO_NOSIGPIPE: %s\n",
|
---|
905 | Curl_strerror(conn, SOCKERRNO));
|
---|
906 | }
|
---|
907 | #else
|
---|
908 | #define nosigpipe(x,y) Curl_nop_stmt
|
---|
909 | #endif
|
---|
910 |
|
---|
911 | #ifdef USE_WINSOCK
|
---|
912 | /* When you run a program that uses the Windows Sockets API, you may
|
---|
913 | experience slow performance when you copy data to a TCP server.
|
---|
914 |
|
---|
915 | https://support.microsoft.com/kb/823764
|
---|
916 |
|
---|
917 | Work-around: Make the Socket Send Buffer Size Larger Than the Program Send
|
---|
918 | Buffer Size
|
---|
919 |
|
---|
920 | The problem described in this knowledge-base is applied only to pre-Vista
|
---|
921 | Windows. Following function trying to detect OS version and skips
|
---|
922 | SO_SNDBUF adjustment for Windows Vista and above.
|
---|
923 | */
|
---|
924 | #define DETECT_OS_NONE 0
|
---|
925 | #define DETECT_OS_PREVISTA 1
|
---|
926 | #define DETECT_OS_VISTA_OR_LATER 2
|
---|
927 |
|
---|
928 | void Curl_sndbufset(curl_socket_t sockfd)
|
---|
929 | {
|
---|
930 | int val = CURL_MAX_WRITE_SIZE + 32;
|
---|
931 | int curval = 0;
|
---|
932 | int curlen = sizeof(curval);
|
---|
933 | DWORD majorVersion = 6;
|
---|
934 |
|
---|
935 | static int detectOsState = DETECT_OS_NONE;
|
---|
936 |
|
---|
937 | if(detectOsState == DETECT_OS_NONE) {
|
---|
938 | #if !defined(_WIN32_WINNT) || !defined(_WIN32_WINNT_WIN2K) || \
|
---|
939 | (_WIN32_WINNT < _WIN32_WINNT_WIN2K)
|
---|
940 | OSVERSIONINFO osver;
|
---|
941 |
|
---|
942 | memset(&osver, 0, sizeof(osver));
|
---|
943 | osver.dwOSVersionInfoSize = sizeof(osver);
|
---|
944 |
|
---|
945 | detectOsState = DETECT_OS_PREVISTA;
|
---|
946 | if(GetVersionEx(&osver)) {
|
---|
947 | if(osver.dwMajorVersion >= majorVersion)
|
---|
948 | detectOsState = DETECT_OS_VISTA_OR_LATER;
|
---|
949 | }
|
---|
950 | #else
|
---|
951 | ULONGLONG cm;
|
---|
952 | OSVERSIONINFOEX osver;
|
---|
953 |
|
---|
954 | memset(&osver, 0, sizeof(osver));
|
---|
955 | osver.dwOSVersionInfoSize = sizeof(osver);
|
---|
956 | osver.dwMajorVersion = majorVersion;
|
---|
957 |
|
---|
958 | cm = VerSetConditionMask(0, VER_MAJORVERSION, VER_GREATER_EQUAL);
|
---|
959 | cm = VerSetConditionMask(cm, VER_MINORVERSION, VER_GREATER_EQUAL);
|
---|
960 | cm = VerSetConditionMask(cm, VER_SERVICEPACKMAJOR, VER_GREATER_EQUAL);
|
---|
961 | cm = VerSetConditionMask(cm, VER_SERVICEPACKMINOR, VER_GREATER_EQUAL);
|
---|
962 |
|
---|
963 | if(VerifyVersionInfo(&osver, (VER_MAJORVERSION | VER_MINORVERSION |
|
---|
964 | VER_SERVICEPACKMAJOR | VER_SERVICEPACKMINOR),
|
---|
965 | cm))
|
---|
966 | detectOsState = DETECT_OS_VISTA_OR_LATER;
|
---|
967 | else
|
---|
968 | detectOsState = DETECT_OS_PREVISTA;
|
---|
969 | #endif
|
---|
970 | }
|
---|
971 |
|
---|
972 | if(detectOsState == DETECT_OS_VISTA_OR_LATER)
|
---|
973 | return;
|
---|
974 |
|
---|
975 | if(getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char *)&curval, &curlen) == 0)
|
---|
976 | if(curval > val)
|
---|
977 | return;
|
---|
978 |
|
---|
979 | setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (const char *)&val, sizeof(val));
|
---|
980 | }
|
---|
981 | #endif
|
---|
982 |
|
---|
983 | /*
|
---|
984 | * singleipconnect()
|
---|
985 | *
|
---|
986 | * Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
|
---|
987 | * CURL_SOCKET_BAD. Other errors will however return proper errors.
|
---|
988 | *
|
---|
989 | * singleipconnect() connects to the given IP only, and it may return without
|
---|
990 | * having connected.
|
---|
991 | */
|
---|
992 | static CURLcode singleipconnect(struct connectdata *conn,
|
---|
993 | const Curl_addrinfo *ai,
|
---|
994 | curl_socket_t *sockp)
|
---|
995 | {
|
---|
996 | struct Curl_sockaddr_ex addr;
|
---|
997 | int rc;
|
---|
998 | int error = 0;
|
---|
999 | bool isconnected = FALSE;
|
---|
1000 | struct SessionHandle *data = conn->data;
|
---|
1001 | curl_socket_t sockfd;
|
---|
1002 | CURLcode result;
|
---|
1003 | char ipaddress[MAX_IPADR_LEN];
|
---|
1004 | long port;
|
---|
1005 | bool is_tcp;
|
---|
1006 |
|
---|
1007 | *sockp = CURL_SOCKET_BAD;
|
---|
1008 |
|
---|
1009 | result = Curl_socket(conn, ai, &addr, &sockfd);
|
---|
1010 | if(result)
|
---|
1011 | /* Failed to create the socket, but still return OK since we signal the
|
---|
1012 | lack of socket as well. This allows the parent function to keep looping
|
---|
1013 | over alternative addresses/socket families etc. */
|
---|
1014 | return CURLE_OK;
|
---|
1015 |
|
---|
1016 | /* store remote address and port used in this connection attempt */
|
---|
1017 | if(!getaddressinfo((struct sockaddr*)&addr.sa_addr,
|
---|
1018 | ipaddress, &port)) {
|
---|
1019 | /* malformed address or bug in inet_ntop, try next address */
|
---|
1020 | error = ERRNO;
|
---|
1021 | failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
|
---|
1022 | error, Curl_strerror(conn, error));
|
---|
1023 | Curl_closesocket(conn, sockfd);
|
---|
1024 | return CURLE_OK;
|
---|
1025 | }
|
---|
1026 | infof(data, " Trying %s...\n", ipaddress);
|
---|
1027 |
|
---|
1028 | #ifdef ENABLE_IPV6
|
---|
1029 | is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
|
---|
1030 | addr.socktype == SOCK_STREAM;
|
---|
1031 | #else
|
---|
1032 | is_tcp = (addr.family == AF_INET) && addr.socktype == SOCK_STREAM;
|
---|
1033 | #endif
|
---|
1034 | if(is_tcp && data->set.tcp_nodelay)
|
---|
1035 | Curl_tcpnodelay(conn, sockfd);
|
---|
1036 |
|
---|
1037 | nosigpipe(conn, sockfd);
|
---|
1038 |
|
---|
1039 | Curl_sndbufset(sockfd);
|
---|
1040 |
|
---|
1041 | if(is_tcp && data->set.tcp_keepalive)
|
---|
1042 | tcpkeepalive(data, sockfd);
|
---|
1043 |
|
---|
1044 | if(data->set.fsockopt) {
|
---|
1045 | /* activate callback for setting socket options */
|
---|
1046 | error = data->set.fsockopt(data->set.sockopt_client,
|
---|
1047 | sockfd,
|
---|
1048 | CURLSOCKTYPE_IPCXN);
|
---|
1049 |
|
---|
1050 | if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
|
---|
1051 | isconnected = TRUE;
|
---|
1052 | else if(error) {
|
---|
1053 | Curl_closesocket(conn, sockfd); /* close the socket and bail out */
|
---|
1054 | return CURLE_ABORTED_BY_CALLBACK;
|
---|
1055 | }
|
---|
1056 | }
|
---|
1057 |
|
---|
1058 | /* possibly bind the local end to an IP, interface or port */
|
---|
1059 | if(addr.family == AF_INET
|
---|
1060 | #ifdef ENABLE_IPV6
|
---|
1061 | || addr.family == AF_INET6
|
---|
1062 | #endif
|
---|
1063 | ) {
|
---|
1064 | result = bindlocal(conn, sockfd, addr.family,
|
---|
1065 | Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
|
---|
1066 | if(result) {
|
---|
1067 | Curl_closesocket(conn, sockfd); /* close socket and bail out */
|
---|
1068 | if(result == CURLE_UNSUPPORTED_PROTOCOL) {
|
---|
1069 | /* The address family is not supported on this interface.
|
---|
1070 | We can continue trying addresses */
|
---|
1071 | return CURLE_COULDNT_CONNECT;
|
---|
1072 | }
|
---|
1073 | return result;
|
---|
1074 | }
|
---|
1075 | }
|
---|
1076 |
|
---|
1077 | /* set socket non-blocking */
|
---|
1078 | (void)curlx_nonblock(sockfd, TRUE);
|
---|
1079 |
|
---|
1080 | conn->connecttime = Curl_tvnow();
|
---|
1081 | if(conn->num_addr > 1)
|
---|
1082 | Curl_expire_latest(data, conn->timeoutms_per_addr);
|
---|
1083 |
|
---|
1084 | /* Connect TCP sockets, bind UDP */
|
---|
1085 | if(!isconnected && (conn->socktype == SOCK_STREAM)) {
|
---|
1086 | rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
---|
1087 | if(-1 == rc)
|
---|
1088 | error = SOCKERRNO;
|
---|
1089 | }
|
---|
1090 | else {
|
---|
1091 | *sockp = sockfd;
|
---|
1092 | return CURLE_OK;
|
---|
1093 | }
|
---|
1094 |
|
---|
1095 | #ifdef ENABLE_IPV6
|
---|
1096 | conn->bits.ipv6 = (addr.family == AF_INET6)?TRUE:FALSE;
|
---|
1097 | #endif
|
---|
1098 |
|
---|
1099 | if(-1 == rc) {
|
---|
1100 | switch(error) {
|
---|
1101 | case EINPROGRESS:
|
---|
1102 | case EWOULDBLOCK:
|
---|
1103 | #if defined(EAGAIN)
|
---|
1104 | #if (EAGAIN) != (EWOULDBLOCK)
|
---|
1105 | /* On some platforms EAGAIN and EWOULDBLOCK are the
|
---|
1106 | * same value, and on others they are different, hence
|
---|
1107 | * the odd #if
|
---|
1108 | */
|
---|
1109 | case EAGAIN:
|
---|
1110 | #endif
|
---|
1111 | #endif
|
---|
1112 | result = CURLE_OK;
|
---|
1113 | break;
|
---|
1114 |
|
---|
1115 | default:
|
---|
1116 | /* unknown error, fallthrough and try another address! */
|
---|
1117 | infof(data, "Immediate connect fail for %s: %s\n",
|
---|
1118 | ipaddress, Curl_strerror(conn, error));
|
---|
1119 | data->state.os_errno = error;
|
---|
1120 |
|
---|
1121 | /* connect failed */
|
---|
1122 | Curl_closesocket(conn, sockfd);
|
---|
1123 | result = CURLE_COULDNT_CONNECT;
|
---|
1124 | }
|
---|
1125 | }
|
---|
1126 |
|
---|
1127 | if(!result)
|
---|
1128 | *sockp = sockfd;
|
---|
1129 |
|
---|
1130 | return result;
|
---|
1131 | }
|
---|
1132 |
|
---|
1133 | /*
|
---|
1134 | * TCP connect to the given host with timeout, proxy or remote doesn't matter.
|
---|
1135 | * There might be more than one IP address to try out. Fill in the passed
|
---|
1136 | * pointer with the connected socket.
|
---|
1137 | */
|
---|
1138 |
|
---|
1139 | CURLcode Curl_connecthost(struct connectdata *conn, /* context */
|
---|
1140 | const struct Curl_dns_entry *remotehost)
|
---|
1141 | {
|
---|
1142 | struct SessionHandle *data = conn->data;
|
---|
1143 | struct timeval before = Curl_tvnow();
|
---|
1144 | CURLcode result = CURLE_COULDNT_CONNECT;
|
---|
1145 |
|
---|
1146 | long timeout_ms = Curl_timeleft(data, &before, TRUE);
|
---|
1147 |
|
---|
1148 | if(timeout_ms < 0) {
|
---|
1149 | /* a precaution, no need to continue if time already is up */
|
---|
1150 | failf(data, "Connection time-out");
|
---|
1151 | return CURLE_OPERATION_TIMEDOUT;
|
---|
1152 | }
|
---|
1153 |
|
---|
1154 | conn->num_addr = Curl_num_addresses(remotehost->addr);
|
---|
1155 | conn->tempaddr[0] = remotehost->addr;
|
---|
1156 | conn->tempaddr[1] = NULL;
|
---|
1157 | conn->tempsock[0] = CURL_SOCKET_BAD;
|
---|
1158 | conn->tempsock[1] = CURL_SOCKET_BAD;
|
---|
1159 | Curl_expire(conn->data, HAPPY_EYEBALLS_TIMEOUT);
|
---|
1160 |
|
---|
1161 | /* Max time for the next connection attempt */
|
---|
1162 | conn->timeoutms_per_addr =
|
---|
1163 | conn->tempaddr[0]->ai_next == NULL ? timeout_ms : timeout_ms / 2;
|
---|
1164 |
|
---|
1165 | /* start connecting to first IP */
|
---|
1166 | while(conn->tempaddr[0]) {
|
---|
1167 | result = singleipconnect(conn, conn->tempaddr[0], &(conn->tempsock[0]));
|
---|
1168 | if(!result)
|
---|
1169 | break;
|
---|
1170 | conn->tempaddr[0] = conn->tempaddr[0]->ai_next;
|
---|
1171 | }
|
---|
1172 |
|
---|
1173 | if(conn->tempsock[0] == CURL_SOCKET_BAD) {
|
---|
1174 | if(!result)
|
---|
1175 | result = CURLE_COULDNT_CONNECT;
|
---|
1176 | return result;
|
---|
1177 | }
|
---|
1178 |
|
---|
1179 | data->info.numconnects++; /* to track the number of connections made */
|
---|
1180 |
|
---|
1181 | return CURLE_OK;
|
---|
1182 | }
|
---|
1183 |
|
---|
1184 | struct connfind {
|
---|
1185 | struct connectdata *tofind;
|
---|
1186 | bool found;
|
---|
1187 | };
|
---|
1188 |
|
---|
1189 | static int conn_is_conn(struct connectdata *conn, void *param)
|
---|
1190 | {
|
---|
1191 | struct connfind *f = (struct connfind *)param;
|
---|
1192 | if(conn == f->tofind) {
|
---|
1193 | f->found = TRUE;
|
---|
1194 | return 1;
|
---|
1195 | }
|
---|
1196 | return 0;
|
---|
1197 | }
|
---|
1198 |
|
---|
1199 | /*
|
---|
1200 | * Used to extract socket and connectdata struct for the most recent
|
---|
1201 | * transfer on the given SessionHandle.
|
---|
1202 | *
|
---|
1203 | * The returned socket will be CURL_SOCKET_BAD in case of failure!
|
---|
1204 | */
|
---|
1205 | curl_socket_t Curl_getconnectinfo(struct SessionHandle *data,
|
---|
1206 | struct connectdata **connp)
|
---|
1207 | {
|
---|
1208 | curl_socket_t sockfd;
|
---|
1209 |
|
---|
1210 | DEBUGASSERT(data);
|
---|
1211 |
|
---|
1212 | /* this works for an easy handle:
|
---|
1213 | * - that has been used for curl_easy_perform()
|
---|
1214 | * - that is associated with a multi handle, and whose connection
|
---|
1215 | * was detached with CURLOPT_CONNECT_ONLY
|
---|
1216 | */
|
---|
1217 | if(data->state.lastconnect && (data->multi_easy || data->multi)) {
|
---|
1218 | struct connectdata *c = data->state.lastconnect;
|
---|
1219 | struct connfind find;
|
---|
1220 | find.tofind = data->state.lastconnect;
|
---|
1221 | find.found = FALSE;
|
---|
1222 |
|
---|
1223 | Curl_conncache_foreach(data->multi_easy?
|
---|
1224 | &data->multi_easy->conn_cache:
|
---|
1225 | &data->multi->conn_cache, &find, conn_is_conn);
|
---|
1226 |
|
---|
1227 | if(!find.found) {
|
---|
1228 | data->state.lastconnect = NULL;
|
---|
1229 | return CURL_SOCKET_BAD;
|
---|
1230 | }
|
---|
1231 |
|
---|
1232 | if(connp)
|
---|
1233 | /* only store this if the caller cares for it */
|
---|
1234 | *connp = c;
|
---|
1235 | sockfd = c->sock[FIRSTSOCKET];
|
---|
1236 | /* we have a socket connected, let's determine if the server shut down */
|
---|
1237 | /* determine if ssl */
|
---|
1238 | if(c->ssl[FIRSTSOCKET].use) {
|
---|
1239 | /* use the SSL context */
|
---|
1240 | if(!Curl_ssl_check_cxn(c))
|
---|
1241 | return CURL_SOCKET_BAD; /* FIN received */
|
---|
1242 | }
|
---|
1243 | /* Minix 3.1 doesn't support any flags on recv; just assume socket is OK */
|
---|
1244 | #ifdef MSG_PEEK
|
---|
1245 | else if(sockfd != CURL_SOCKET_BAD) {
|
---|
1246 | /* use the socket */
|
---|
1247 | char buf;
|
---|
1248 | if(recv((RECV_TYPE_ARG1)sockfd, (RECV_TYPE_ARG2)&buf,
|
---|
1249 | (RECV_TYPE_ARG3)1, (RECV_TYPE_ARG4)MSG_PEEK) == 0) {
|
---|
1250 | return CURL_SOCKET_BAD; /* FIN received */
|
---|
1251 | }
|
---|
1252 | }
|
---|
1253 | #endif
|
---|
1254 | }
|
---|
1255 | else
|
---|
1256 | return CURL_SOCKET_BAD;
|
---|
1257 |
|
---|
1258 | return sockfd;
|
---|
1259 | }
|
---|
1260 |
|
---|
1261 | /*
|
---|
1262 | * Close a socket.
|
---|
1263 | *
|
---|
1264 | * 'conn' can be NULL, beware!
|
---|
1265 | */
|
---|
1266 | int Curl_closesocket(struct connectdata *conn,
|
---|
1267 | curl_socket_t sock)
|
---|
1268 | {
|
---|
1269 | if(conn && conn->fclosesocket) {
|
---|
1270 | if((sock == conn->sock[SECONDARYSOCKET]) &&
|
---|
1271 | conn->sock_accepted[SECONDARYSOCKET])
|
---|
1272 | /* if this socket matches the second socket, and that was created with
|
---|
1273 | accept, then we MUST NOT call the callback but clear the accepted
|
---|
1274 | status */
|
---|
1275 | conn->sock_accepted[SECONDARYSOCKET] = FALSE;
|
---|
1276 | else {
|
---|
1277 | Curl_multi_closed(conn, sock);
|
---|
1278 | return conn->fclosesocket(conn->closesocket_client, sock);
|
---|
1279 | }
|
---|
1280 | }
|
---|
1281 |
|
---|
1282 | if(conn)
|
---|
1283 | /* tell the multi-socket code about this */
|
---|
1284 | Curl_multi_closed(conn, sock);
|
---|
1285 |
|
---|
1286 | sclose(sock);
|
---|
1287 |
|
---|
1288 | return 0;
|
---|
1289 | }
|
---|
1290 |
|
---|
1291 | /*
|
---|
1292 | * Create a socket based on info from 'conn' and 'ai'.
|
---|
1293 | *
|
---|
1294 | * 'addr' should be a pointer to the correct struct to get data back, or NULL.
|
---|
1295 | * 'sockfd' must be a pointer to a socket descriptor.
|
---|
1296 | *
|
---|
1297 | * If the open socket callback is set, used that!
|
---|
1298 | *
|
---|
1299 | */
|
---|
1300 | CURLcode Curl_socket(struct connectdata *conn,
|
---|
1301 | const Curl_addrinfo *ai,
|
---|
1302 | struct Curl_sockaddr_ex *addr,
|
---|
1303 | curl_socket_t *sockfd)
|
---|
1304 | {
|
---|
1305 | struct SessionHandle *data = conn->data;
|
---|
1306 | struct Curl_sockaddr_ex dummy;
|
---|
1307 |
|
---|
1308 | if(!addr)
|
---|
1309 | /* if the caller doesn't want info back, use a local temp copy */
|
---|
1310 | addr = &dummy;
|
---|
1311 |
|
---|
1312 | /*
|
---|
1313 | * The Curl_sockaddr_ex structure is basically libcurl's external API
|
---|
1314 | * curl_sockaddr structure with enough space available to directly hold
|
---|
1315 | * any protocol-specific address structures. The variable declared here
|
---|
1316 | * will be used to pass / receive data to/from the fopensocket callback
|
---|
1317 | * if this has been set, before that, it is initialized from parameters.
|
---|
1318 | */
|
---|
1319 |
|
---|
1320 | addr->family = ai->ai_family;
|
---|
1321 | addr->socktype = conn->socktype;
|
---|
1322 | addr->protocol = conn->socktype==SOCK_DGRAM?IPPROTO_UDP:ai->ai_protocol;
|
---|
1323 | addr->addrlen = ai->ai_addrlen;
|
---|
1324 |
|
---|
1325 | if(addr->addrlen > sizeof(struct Curl_sockaddr_storage))
|
---|
1326 | addr->addrlen = sizeof(struct Curl_sockaddr_storage);
|
---|
1327 | memcpy(&addr->sa_addr, ai->ai_addr, addr->addrlen);
|
---|
1328 |
|
---|
1329 | if(data->set.fopensocket)
|
---|
1330 | /*
|
---|
1331 | * If the opensocket callback is set, all the destination address
|
---|
1332 | * information is passed to the callback. Depending on this information the
|
---|
1333 | * callback may opt to abort the connection, this is indicated returning
|
---|
1334 | * CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
|
---|
1335 | * the callback returns a valid socket the destination address information
|
---|
1336 | * might have been changed and this 'new' address will actually be used
|
---|
1337 | * here to connect.
|
---|
1338 | */
|
---|
1339 | *sockfd = data->set.fopensocket(data->set.opensocket_client,
|
---|
1340 | CURLSOCKTYPE_IPCXN,
|
---|
1341 | (struct curl_sockaddr *)addr);
|
---|
1342 | else
|
---|
1343 | /* opensocket callback not set, so simply create the socket now */
|
---|
1344 | *sockfd = socket(addr->family, addr->socktype, addr->protocol);
|
---|
1345 |
|
---|
1346 | if(*sockfd == CURL_SOCKET_BAD)
|
---|
1347 | /* no socket, no connection */
|
---|
1348 | return CURLE_COULDNT_CONNECT;
|
---|
1349 |
|
---|
1350 | #if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
|
---|
1351 | if(conn->scope_id && (addr->family == AF_INET6)) {
|
---|
1352 | struct sockaddr_in6 * const sa6 = (void *)&addr->sa_addr;
|
---|
1353 | sa6->sin6_scope_id = conn->scope_id;
|
---|
1354 | }
|
---|
1355 | #endif
|
---|
1356 |
|
---|
1357 | return CURLE_OK;
|
---|
1358 |
|
---|
1359 | }
|
---|
1360 |
|
---|
1361 | #ifdef CURLDEBUG
|
---|
1362 | /*
|
---|
1363 | * Curl_conncontrol() is used to set the conn->bits.close bit on or off. It
|
---|
1364 | * MUST be called with the connclose() or connkeep() macros with a stated
|
---|
1365 | * reason. The reason is only shown in debug builds but helps to figure out
|
---|
1366 | * decision paths when connections are or aren't re-used as expected.
|
---|
1367 | */
|
---|
1368 | void Curl_conncontrol(struct connectdata *conn, bool closeit,
|
---|
1369 | const char *reason)
|
---|
1370 | {
|
---|
1371 | #if defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
1372 | (void) reason;
|
---|
1373 | #endif
|
---|
1374 | if(closeit != conn->bits.close) {
|
---|
1375 | infof(conn->data, "Marked for [%s]: %s\n", closeit?"closure":"keep alive",
|
---|
1376 | reason);
|
---|
1377 |
|
---|
1378 | conn->bits.close = closeit; /* the only place in the source code that
|
---|
1379 | should assign this bit */
|
---|
1380 | }
|
---|
1381 | }
|
---|
1382 | #endif
|
---|