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 - 2022, Daniel Stenberg, <[email protected]>, 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.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_LINUX_TCP_H
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32 | #include <linux/tcp.h>
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33 | #elif defined(HAVE_NETINET_TCP_H)
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34 | #include <netinet/tcp.h>
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35 | #endif
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36 | #ifdef HAVE_SYS_IOCTL_H
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37 | #include <sys/ioctl.h>
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38 | #endif
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39 | #ifdef HAVE_NETDB_H
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40 | #include <netdb.h>
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41 | #endif
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42 | #ifdef HAVE_FCNTL_H
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43 | #include <fcntl.h>
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44 | #endif
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45 | #ifdef HAVE_ARPA_INET_H
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46 | #include <arpa/inet.h>
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47 | #endif
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48 |
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49 | #if (defined(HAVE_IOCTL_FIONBIO) && defined(NETWARE))
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50 | #include <sys/filio.h>
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51 | #endif
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52 | #ifdef NETWARE
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53 | #undef in_addr_t
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54 | #define in_addr_t unsigned long
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55 | #endif
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56 | #ifdef __VMS
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57 | #include <in.h>
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58 | #include <inet.h>
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59 | #endif
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60 |
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61 | #include "urldata.h"
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62 | #include "sendf.h"
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63 | #include "if2ip.h"
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64 | #include "strerror.h"
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65 | #include "connect.h"
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66 | #include "select.h"
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67 | #include "url.h" /* for Curl_safefree() */
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68 | #include "multiif.h"
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69 | #include "sockaddr.h" /* required for Curl_sockaddr_storage */
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70 | #include "inet_ntop.h"
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71 | #include "inet_pton.h"
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72 | #include "vtls/vtls.h" /* for Curl_ssl_check_cxn() */
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73 | #include "progress.h"
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74 | #include "warnless.h"
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75 | #include "conncache.h"
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76 | #include "multihandle.h"
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77 | #include "share.h"
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78 | #include "version_win32.h"
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79 | #include "quic.h"
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80 | #include "socks.h"
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81 |
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82 | /* The last 3 #include files should be in this order */
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83 | #include "curl_printf.h"
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84 | #include "curl_memory.h"
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85 | #include "memdebug.h"
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86 |
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87 | static bool verifyconnect(curl_socket_t sockfd, int *error);
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88 |
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89 | #if defined(__DragonFly__) || defined(HAVE_WINSOCK2_H)
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90 | /* DragonFlyBSD and Windows use millisecond units */
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91 | #define KEEPALIVE_FACTOR(x) (x *= 1000)
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92 | #else
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93 | #define KEEPALIVE_FACTOR(x)
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94 | #endif
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95 |
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96 | #if defined(HAVE_WINSOCK2_H) && !defined(SIO_KEEPALIVE_VALS)
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97 | #define SIO_KEEPALIVE_VALS _WSAIOW(IOC_VENDOR,4)
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98 |
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99 | struct tcp_keepalive {
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100 | u_long onoff;
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101 | u_long keepalivetime;
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102 | u_long keepaliveinterval;
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103 | };
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104 | #endif
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105 |
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106 | static void
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107 | tcpkeepalive(struct Curl_easy *data,
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108 | curl_socket_t sockfd)
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109 | {
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110 | int optval = data->set.tcp_keepalive?1:0;
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111 |
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112 | /* only set IDLE and INTVL if setting KEEPALIVE is successful */
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113 | if(setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE,
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114 | (void *)&optval, sizeof(optval)) < 0) {
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115 | infof(data, "Failed to set SO_KEEPALIVE on fd %d", sockfd);
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116 | }
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117 | else {
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118 | #if defined(SIO_KEEPALIVE_VALS)
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119 | struct tcp_keepalive vals;
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120 | DWORD dummy;
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121 | vals.onoff = 1;
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122 | optval = curlx_sltosi(data->set.tcp_keepidle);
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123 | KEEPALIVE_FACTOR(optval);
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124 | vals.keepalivetime = optval;
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125 | optval = curlx_sltosi(data->set.tcp_keepintvl);
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126 | KEEPALIVE_FACTOR(optval);
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127 | vals.keepaliveinterval = optval;
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128 | if(WSAIoctl(sockfd, SIO_KEEPALIVE_VALS, (LPVOID) &vals, sizeof(vals),
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129 | NULL, 0, &dummy, NULL, NULL) != 0) {
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130 | infof(data, "Failed to set SIO_KEEPALIVE_VALS on fd %d: %d",
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131 | (int)sockfd, WSAGetLastError());
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132 | }
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133 | #else
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134 | #ifdef TCP_KEEPIDLE
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135 | optval = curlx_sltosi(data->set.tcp_keepidle);
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136 | KEEPALIVE_FACTOR(optval);
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137 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE,
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138 | (void *)&optval, sizeof(optval)) < 0) {
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139 | infof(data, "Failed to set TCP_KEEPIDLE on fd %d", sockfd);
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140 | }
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141 | #elif defined(TCP_KEEPALIVE)
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142 | /* Mac OS X style */
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143 | optval = curlx_sltosi(data->set.tcp_keepidle);
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144 | KEEPALIVE_FACTOR(optval);
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145 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPALIVE,
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146 | (void *)&optval, sizeof(optval)) < 0) {
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147 | infof(data, "Failed to set TCP_KEEPALIVE on fd %d", sockfd);
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148 | }
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149 | #endif
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150 | #ifdef TCP_KEEPINTVL
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151 | optval = curlx_sltosi(data->set.tcp_keepintvl);
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152 | KEEPALIVE_FACTOR(optval);
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153 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL,
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154 | (void *)&optval, sizeof(optval)) < 0) {
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155 | infof(data, "Failed to set TCP_KEEPINTVL on fd %d", 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 Curl_easy *data,
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164 | struct connectdata *conn,
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165 | const struct Curl_addrinfo *ai, /* start connecting to this */
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166 | int tempindex); /* 0 or 1 among the temp ones */
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167 |
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168 | /*
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169 | * Curl_timeleft() returns the amount of milliseconds left allowed for the
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170 | * transfer/connection. If the value is 0, there's no timeout (ie there's
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171 | * infinite time left). If the value is negative, the timeout time has already
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172 | * elapsed.
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173 | *
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174 | * If 'nowp' is non-NULL, it points to the current time.
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175 | * 'duringconnect' is FALSE if not during a connect, as then of course the
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176 | * connect timeout is not taken into account!
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177 | *
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178 | * @unittest: 1303
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179 | */
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180 |
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181 | #define TIMEOUT_CONNECT 1
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182 | #define TIMEOUT_MAXTIME 2
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183 |
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184 | timediff_t Curl_timeleft(struct Curl_easy *data,
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185 | struct curltime *nowp,
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186 | bool duringconnect)
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187 | {
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188 | unsigned int timeout_set = 0;
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189 | timediff_t connect_timeout_ms = 0;
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190 | timediff_t maxtime_timeout_ms = 0;
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191 | timediff_t timeout_ms = 0;
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192 | struct curltime now;
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193 |
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194 | /* The duration of a connect and the total transfer are calculated from two
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195 | different time-stamps. It can end up with the total timeout being reached
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196 | before the connect timeout expires and we must acknowledge whichever
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197 | timeout that is reached first. The total timeout is set per entire
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198 | operation, while the connect timeout is set per connect. */
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199 |
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200 | if(data->set.timeout > 0) {
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201 | timeout_set = TIMEOUT_MAXTIME;
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202 | maxtime_timeout_ms = data->set.timeout;
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203 | }
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204 | if(duringconnect) {
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205 | timeout_set |= TIMEOUT_CONNECT;
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206 | connect_timeout_ms = (data->set.connecttimeout > 0) ?
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207 | data->set.connecttimeout : DEFAULT_CONNECT_TIMEOUT;
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208 | }
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209 | if(!timeout_set)
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210 | /* no timeout */
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211 | return 0;
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212 |
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213 | if(!nowp) {
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214 | now = Curl_now();
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215 | nowp = &now;
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216 | }
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217 |
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218 | if(timeout_set & TIMEOUT_MAXTIME) {
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219 | maxtime_timeout_ms -= Curl_timediff(*nowp, data->progress.t_startop);
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220 | timeout_ms = maxtime_timeout_ms;
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221 | }
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222 |
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223 | if(timeout_set & TIMEOUT_CONNECT) {
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224 | connect_timeout_ms -= Curl_timediff(*nowp, data->progress.t_startsingle);
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225 |
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226 | if(!(timeout_set & TIMEOUT_MAXTIME) ||
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227 | (connect_timeout_ms < maxtime_timeout_ms))
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228 | timeout_ms = connect_timeout_ms;
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229 | }
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230 |
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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 Curl_easy *data,
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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 connectdata *conn = data->conn;
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242 | struct Curl_sockaddr_storage sa;
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243 | struct sockaddr *sock = (struct sockaddr *)&sa; /* bind to this address */
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244 | curl_socklen_t sizeof_sa = 0; /* size of the data sock points to */
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245 | struct sockaddr_in *si4 = (struct sockaddr_in *)&sa;
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246 | #ifdef ENABLE_IPV6
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247 | struct sockaddr_in6 *si6 = (struct sockaddr_in6 *)&sa;
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248 | #endif
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249 |
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250 | struct Curl_dns_entry *h = NULL;
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251 | unsigned short port = data->set.localport; /* use this port number, 0 for
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252 | "random" */
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253 | /* how many port numbers to try to bind to, increasing one at a time */
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254 | int portnum = data->set.localportrange;
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255 | const char *dev = data->set.str[STRING_DEVICE];
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256 | int error;
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257 | #ifdef IP_BIND_ADDRESS_NO_PORT
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258 | int on = 1;
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259 | #endif
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260 | #ifndef ENABLE_IPV6
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261 | (void)scope;
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262 | #endif
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263 |
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264 | /*************************************************************
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265 | * Select device to bind socket to
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266 | *************************************************************/
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267 | if(!dev && !port)
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268 | /* no local kind of binding was requested */
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269 | return CURLE_OK;
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270 |
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271 | memset(&sa, 0, sizeof(struct Curl_sockaddr_storage));
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272 |
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273 | if(dev && (strlen(dev)<255) ) {
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274 | char myhost[256] = "";
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275 | int done = 0; /* -1 for error, 1 for address found */
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276 | bool is_interface = FALSE;
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277 | bool is_host = FALSE;
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278 | static const char *if_prefix = "if!";
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279 | static const char *host_prefix = "host!";
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280 |
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281 | if(strncmp(if_prefix, dev, strlen(if_prefix)) == 0) {
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282 | dev += strlen(if_prefix);
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283 | is_interface = TRUE;
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284 | }
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285 | else if(strncmp(host_prefix, dev, strlen(host_prefix)) == 0) {
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286 | dev += strlen(host_prefix);
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287 | is_host = TRUE;
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288 | }
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289 |
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290 | /* interface */
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291 | if(!is_host) {
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292 | #ifdef SO_BINDTODEVICE
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293 | /* I am not sure any other OSs than Linux that provide this feature,
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294 | * and at the least I cannot test. --Ben
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295 | *
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296 | * This feature allows one to tightly bind the local socket to a
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297 | * particular interface. This will force even requests to other
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298 | * local interfaces to go out the external interface.
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299 | *
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300 | *
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301 | * Only bind to the interface when specified as interface, not just
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302 | * as a hostname or ip address.
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303 | *
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304 | * interface might be a VRF, eg: vrf-blue, which means it cannot be
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305 | * converted to an IP address and would fail Curl_if2ip. Simply try
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306 | * to use it straight away.
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307 | */
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308 | if(setsockopt(sockfd, SOL_SOCKET, SO_BINDTODEVICE,
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309 | dev, (curl_socklen_t)strlen(dev) + 1) == 0) {
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310 | /* This is typically "errno 1, error: Operation not permitted" if
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311 | * you're not running as root or another suitable privileged
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312 | * user.
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313 | * If it succeeds it means the parameter was a valid interface and
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314 | * not an IP address. Return immediately.
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315 | */
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316 | return CURLE_OK;
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317 | }
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318 | #endif
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319 |
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320 | switch(Curl_if2ip(af,
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321 | #ifdef ENABLE_IPV6
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322 | scope, conn->scope_id,
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323 | #endif
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324 | dev, myhost, sizeof(myhost))) {
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325 | case IF2IP_NOT_FOUND:
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326 | if(is_interface) {
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327 | /* Do not fall back to treating it as a host name */
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328 | failf(data, "Couldn't bind to interface '%s'", dev);
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329 | return CURLE_INTERFACE_FAILED;
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330 | }
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331 | break;
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332 | case IF2IP_AF_NOT_SUPPORTED:
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333 | /* Signal the caller to try another address family if available */
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334 | return CURLE_UNSUPPORTED_PROTOCOL;
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335 | case IF2IP_FOUND:
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336 | is_interface = TRUE;
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337 | /*
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338 | * We now have the numerical IP address in the 'myhost' buffer
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339 | */
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340 | infof(data, "Local Interface %s is ip %s using address family %i",
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341 | dev, myhost, af);
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342 | done = 1;
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343 | break;
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344 | }
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345 | }
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346 | if(!is_interface) {
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347 | /*
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348 | * This was not an interface, resolve the name as a host name
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349 | * or IP number
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350 | *
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351 | * Temporarily force name resolution to use only the address type
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352 | * of the connection. The resolve functions should really be changed
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353 | * to take a type parameter instead.
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354 | */
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355 | unsigned char ipver = conn->ip_version;
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356 | int rc;
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357 |
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358 | if(af == AF_INET)
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359 | conn->ip_version = CURL_IPRESOLVE_V4;
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360 | #ifdef ENABLE_IPV6
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361 | else if(af == AF_INET6)
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362 | conn->ip_version = CURL_IPRESOLVE_V6;
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363 | #endif
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364 |
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365 | rc = Curl_resolv(data, dev, 0, FALSE, &h);
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366 | if(rc == CURLRESOLV_PENDING)
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367 | (void)Curl_resolver_wait_resolv(data, &h);
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368 | conn->ip_version = ipver;
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369 |
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370 | if(h) {
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371 | /* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
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372 | Curl_printable_address(h->addr, myhost, sizeof(myhost));
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373 | infof(data, "Name '%s' family %i resolved to '%s' family %i",
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374 | dev, af, myhost, h->addr->ai_family);
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375 | Curl_resolv_unlock(data, h);
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376 | if(af != h->addr->ai_family) {
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377 | /* bad IP version combo, signal the caller to try another address
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378 | family if available */
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379 | return CURLE_UNSUPPORTED_PROTOCOL;
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380 | }
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381 | done = 1;
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382 | }
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383 | else {
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384 | /*
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385 | * provided dev was no interface (or interfaces are not supported
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386 | * e.g. solaris) no ip address and no domain we fail here
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387 | */
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388 | done = -1;
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389 | }
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390 | }
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391 |
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392 | if(done > 0) {
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393 | #ifdef ENABLE_IPV6
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394 | /* IPv6 address */
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395 | if(af == AF_INET6) {
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396 | #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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397 | char *scope_ptr = strchr(myhost, '%');
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398 | if(scope_ptr)
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399 | *(scope_ptr++) = 0;
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400 | #endif
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401 | if(Curl_inet_pton(AF_INET6, myhost, &si6->sin6_addr) > 0) {
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402 | si6->sin6_family = AF_INET6;
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403 | si6->sin6_port = htons(port);
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404 | #ifdef HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID
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405 | if(scope_ptr)
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406 | /* The "myhost" string either comes from Curl_if2ip or from
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407 | Curl_printable_address. The latter returns only numeric scope
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408 | IDs and the former returns none at all. So the scope ID, if
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409 | present, is known to be numeric */
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410 | si6->sin6_scope_id = atoi(scope_ptr);
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411 | #endif
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412 | }
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413 | sizeof_sa = sizeof(struct sockaddr_in6);
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414 | }
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415 | else
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416 | #endif
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417 | /* IPv4 address */
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418 | if((af == AF_INET) &&
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419 | (Curl_inet_pton(AF_INET, myhost, &si4->sin_addr) > 0)) {
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420 | si4->sin_family = AF_INET;
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421 | si4->sin_port = htons(port);
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422 | sizeof_sa = sizeof(struct sockaddr_in);
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423 | }
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424 | }
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425 |
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426 | if(done < 1) {
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427 | /* errorbuf is set false so failf will overwrite any message already in
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428 | the error buffer, so the user receives this error message instead of a
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429 | generic resolve error. */
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430 | data->state.errorbuf = FALSE;
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431 | failf(data, "Couldn't bind to '%s'", dev);
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432 | return CURLE_INTERFACE_FAILED;
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433 | }
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434 | }
|
---|
435 | else {
|
---|
436 | /* no device was given, prepare sa to match af's needs */
|
---|
437 | #ifdef ENABLE_IPV6
|
---|
438 | if(af == AF_INET6) {
|
---|
439 | si6->sin6_family = AF_INET6;
|
---|
440 | si6->sin6_port = htons(port);
|
---|
441 | sizeof_sa = sizeof(struct sockaddr_in6);
|
---|
442 | }
|
---|
443 | else
|
---|
444 | #endif
|
---|
445 | if(af == AF_INET) {
|
---|
446 | si4->sin_family = AF_INET;
|
---|
447 | si4->sin_port = htons(port);
|
---|
448 | sizeof_sa = sizeof(struct sockaddr_in);
|
---|
449 | }
|
---|
450 | }
|
---|
451 | #ifdef IP_BIND_ADDRESS_NO_PORT
|
---|
452 | (void)setsockopt(sockfd, SOL_IP, IP_BIND_ADDRESS_NO_PORT, &on, sizeof(on));
|
---|
453 | #endif
|
---|
454 | for(;;) {
|
---|
455 | if(bind(sockfd, sock, sizeof_sa) >= 0) {
|
---|
456 | /* we succeeded to bind */
|
---|
457 | struct Curl_sockaddr_storage add;
|
---|
458 | curl_socklen_t size = sizeof(add);
|
---|
459 | memset(&add, 0, sizeof(struct Curl_sockaddr_storage));
|
---|
460 | if(getsockname(sockfd, (struct sockaddr *) &add, &size) < 0) {
|
---|
461 | char buffer[STRERROR_LEN];
|
---|
462 | data->state.os_errno = error = SOCKERRNO;
|
---|
463 | failf(data, "getsockname() failed with errno %d: %s",
|
---|
464 | error, Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
465 | return CURLE_INTERFACE_FAILED;
|
---|
466 | }
|
---|
467 | infof(data, "Local port: %hu", port);
|
---|
468 | conn->bits.bound = TRUE;
|
---|
469 | return CURLE_OK;
|
---|
470 | }
|
---|
471 |
|
---|
472 | if(--portnum > 0) {
|
---|
473 | infof(data, "Bind to local port %hu failed, trying next", port);
|
---|
474 | port++; /* try next port */
|
---|
475 | /* We re-use/clobber the port variable here below */
|
---|
476 | if(sock->sa_family == AF_INET)
|
---|
477 | si4->sin_port = ntohs(port);
|
---|
478 | #ifdef ENABLE_IPV6
|
---|
479 | else
|
---|
480 | si6->sin6_port = ntohs(port);
|
---|
481 | #endif
|
---|
482 | }
|
---|
483 | else
|
---|
484 | break;
|
---|
485 | }
|
---|
486 | {
|
---|
487 | char buffer[STRERROR_LEN];
|
---|
488 | data->state.os_errno = error = SOCKERRNO;
|
---|
489 | failf(data, "bind failed with errno %d: %s",
|
---|
490 | error, Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
491 | }
|
---|
492 |
|
---|
493 | return CURLE_INTERFACE_FAILED;
|
---|
494 | }
|
---|
495 |
|
---|
496 | /*
|
---|
497 | * verifyconnect() returns TRUE if the connect really has happened.
|
---|
498 | */
|
---|
499 | static bool verifyconnect(curl_socket_t sockfd, int *error)
|
---|
500 | {
|
---|
501 | bool rc = TRUE;
|
---|
502 | #ifdef SO_ERROR
|
---|
503 | int err = 0;
|
---|
504 | curl_socklen_t errSize = sizeof(err);
|
---|
505 |
|
---|
506 | #ifdef WIN32
|
---|
507 | /*
|
---|
508 | * In October 2003 we effectively nullified this function on Windows due to
|
---|
509 | * problems with it using all CPU in multi-threaded cases.
|
---|
510 | *
|
---|
511 | * In May 2004, we bring it back to offer more info back on connect failures.
|
---|
512 | * Gisle Vanem could reproduce the former problems with this function, but
|
---|
513 | * could avoid them by adding this SleepEx() call below:
|
---|
514 | *
|
---|
515 | * "I don't have Rational Quantify, but the hint from his post was
|
---|
516 | * ntdll::NtRemoveIoCompletion(). So I'd assume the SleepEx (or maybe
|
---|
517 | * just Sleep(0) would be enough?) would release whatever
|
---|
518 | * mutex/critical-section the ntdll call is waiting on.
|
---|
519 | *
|
---|
520 | * Someone got to verify this on Win-NT 4.0, 2000."
|
---|
521 | */
|
---|
522 |
|
---|
523 | #ifdef _WIN32_WCE
|
---|
524 | Sleep(0);
|
---|
525 | #else
|
---|
526 | SleepEx(0, FALSE);
|
---|
527 | #endif
|
---|
528 |
|
---|
529 | #endif
|
---|
530 |
|
---|
531 | if(0 != getsockopt(sockfd, SOL_SOCKET, SO_ERROR, (void *)&err, &errSize))
|
---|
532 | err = SOCKERRNO;
|
---|
533 | #ifdef _WIN32_WCE
|
---|
534 | /* Old WinCE versions don't support SO_ERROR */
|
---|
535 | if(WSAENOPROTOOPT == err) {
|
---|
536 | SET_SOCKERRNO(0);
|
---|
537 | err = 0;
|
---|
538 | }
|
---|
539 | #endif
|
---|
540 | #if defined(EBADIOCTL) && defined(__minix)
|
---|
541 | /* Minix 3.1.x doesn't support getsockopt on UDP sockets */
|
---|
542 | if(EBADIOCTL == err) {
|
---|
543 | SET_SOCKERRNO(0);
|
---|
544 | err = 0;
|
---|
545 | }
|
---|
546 | #endif
|
---|
547 | if((0 == err) || (EISCONN == err))
|
---|
548 | /* we are connected, awesome! */
|
---|
549 | rc = TRUE;
|
---|
550 | else
|
---|
551 | /* This wasn't a successful connect */
|
---|
552 | rc = FALSE;
|
---|
553 | if(error)
|
---|
554 | *error = err;
|
---|
555 | #else
|
---|
556 | (void)sockfd;
|
---|
557 | if(error)
|
---|
558 | *error = SOCKERRNO;
|
---|
559 | #endif
|
---|
560 | return rc;
|
---|
561 | }
|
---|
562 |
|
---|
563 | /* update tempaddr[tempindex] (to the next entry), makes sure to stick
|
---|
564 | to the correct family */
|
---|
565 | static struct Curl_addrinfo *ainext(struct connectdata *conn,
|
---|
566 | int tempindex,
|
---|
567 | bool next) /* use next entry? */
|
---|
568 | {
|
---|
569 | struct Curl_addrinfo *ai = conn->tempaddr[tempindex];
|
---|
570 | if(ai && next)
|
---|
571 | ai = ai->ai_next;
|
---|
572 | while(ai && (ai->ai_family != conn->tempfamily[tempindex]))
|
---|
573 | ai = ai->ai_next;
|
---|
574 | conn->tempaddr[tempindex] = ai;
|
---|
575 | return ai;
|
---|
576 | }
|
---|
577 |
|
---|
578 | /* Used within the multi interface. Try next IP address, returns error if no
|
---|
579 | more address exists or error */
|
---|
580 | static CURLcode trynextip(struct Curl_easy *data,
|
---|
581 | struct connectdata *conn,
|
---|
582 | int sockindex,
|
---|
583 | int tempindex)
|
---|
584 | {
|
---|
585 | CURLcode result = CURLE_COULDNT_CONNECT;
|
---|
586 |
|
---|
587 | /* First clean up after the failed socket.
|
---|
588 | Don't close it yet to ensure that the next IP's socket gets a different
|
---|
589 | file descriptor, which can prevent bugs when the curl_multi_socket_action
|
---|
590 | interface is used with certain select() replacements such as kqueue. */
|
---|
591 | curl_socket_t fd_to_close = conn->tempsock[tempindex];
|
---|
592 | conn->tempsock[tempindex] = CURL_SOCKET_BAD;
|
---|
593 |
|
---|
594 | if(sockindex == FIRSTSOCKET) {
|
---|
595 | struct Curl_addrinfo *ai = conn->tempaddr[tempindex];
|
---|
596 |
|
---|
597 | while(ai) {
|
---|
598 | result = singleipconnect(data, conn, ai, tempindex);
|
---|
599 | if(result == CURLE_COULDNT_CONNECT) {
|
---|
600 | ai = ainext(conn, tempindex, TRUE);
|
---|
601 | continue;
|
---|
602 | }
|
---|
603 | break;
|
---|
604 | }
|
---|
605 | }
|
---|
606 |
|
---|
607 | if(fd_to_close != CURL_SOCKET_BAD)
|
---|
608 | Curl_closesocket(data, conn, fd_to_close);
|
---|
609 |
|
---|
610 | return result;
|
---|
611 | }
|
---|
612 |
|
---|
613 | /* Copies connection info into the transfer handle to make it available when
|
---|
614 | the transfer handle is no longer associated with the connection. */
|
---|
615 | void Curl_persistconninfo(struct Curl_easy *data, struct connectdata *conn,
|
---|
616 | char *local_ip, int local_port)
|
---|
617 | {
|
---|
618 | memcpy(data->info.conn_primary_ip, conn->primary_ip, MAX_IPADR_LEN);
|
---|
619 | if(local_ip && local_ip[0])
|
---|
620 | memcpy(data->info.conn_local_ip, local_ip, MAX_IPADR_LEN);
|
---|
621 | else
|
---|
622 | data->info.conn_local_ip[0] = 0;
|
---|
623 | data->info.conn_scheme = conn->handler->scheme;
|
---|
624 | data->info.conn_protocol = conn->handler->protocol;
|
---|
625 | data->info.conn_primary_port = conn->port;
|
---|
626 | data->info.conn_remote_port = conn->remote_port;
|
---|
627 | data->info.conn_local_port = local_port;
|
---|
628 | }
|
---|
629 |
|
---|
630 | /* retrieves ip address and port from a sockaddr structure.
|
---|
631 | note it calls Curl_inet_ntop which sets errno on fail, not SOCKERRNO. */
|
---|
632 | bool Curl_addr2string(struct sockaddr *sa, curl_socklen_t salen,
|
---|
633 | char *addr, int *port)
|
---|
634 | {
|
---|
635 | struct sockaddr_in *si = NULL;
|
---|
636 | #ifdef ENABLE_IPV6
|
---|
637 | struct sockaddr_in6 *si6 = NULL;
|
---|
638 | #endif
|
---|
639 | #if (defined(HAVE_SYS_UN_H) || defined(WIN32_SOCKADDR_UN)) && defined(AF_UNIX)
|
---|
640 | struct sockaddr_un *su = NULL;
|
---|
641 | #else
|
---|
642 | (void)salen;
|
---|
643 | #endif
|
---|
644 |
|
---|
645 | switch(sa->sa_family) {
|
---|
646 | case AF_INET:
|
---|
647 | si = (struct sockaddr_in *)(void *) sa;
|
---|
648 | if(Curl_inet_ntop(sa->sa_family, &si->sin_addr,
|
---|
649 | addr, MAX_IPADR_LEN)) {
|
---|
650 | unsigned short us_port = ntohs(si->sin_port);
|
---|
651 | *port = us_port;
|
---|
652 | return TRUE;
|
---|
653 | }
|
---|
654 | break;
|
---|
655 | #ifdef ENABLE_IPV6
|
---|
656 | case AF_INET6:
|
---|
657 | si6 = (struct sockaddr_in6 *)(void *) sa;
|
---|
658 | if(Curl_inet_ntop(sa->sa_family, &si6->sin6_addr,
|
---|
659 | addr, MAX_IPADR_LEN)) {
|
---|
660 | unsigned short us_port = ntohs(si6->sin6_port);
|
---|
661 | *port = us_port;
|
---|
662 | return TRUE;
|
---|
663 | }
|
---|
664 | break;
|
---|
665 | #endif
|
---|
666 | #if (defined(HAVE_SYS_UN_H) || defined(WIN32_SOCKADDR_UN)) && defined(AF_UNIX)
|
---|
667 | case AF_UNIX:
|
---|
668 | if(salen > (curl_socklen_t)sizeof(CURL_SA_FAMILY_T)) {
|
---|
669 | su = (struct sockaddr_un*)sa;
|
---|
670 | msnprintf(addr, MAX_IPADR_LEN, "%s", su->sun_path);
|
---|
671 | }
|
---|
672 | else
|
---|
673 | addr[0] = 0; /* socket with no name */
|
---|
674 | *port = 0;
|
---|
675 | return TRUE;
|
---|
676 | #endif
|
---|
677 | default:
|
---|
678 | break;
|
---|
679 | }
|
---|
680 |
|
---|
681 | addr[0] = '\0';
|
---|
682 | *port = 0;
|
---|
683 | errno = EAFNOSUPPORT;
|
---|
684 | return FALSE;
|
---|
685 | }
|
---|
686 |
|
---|
687 | /* retrieves the start/end point information of a socket of an established
|
---|
688 | connection */
|
---|
689 | void Curl_conninfo_remote(struct Curl_easy *data,
|
---|
690 | struct connectdata *conn, curl_socket_t sockfd)
|
---|
691 | {
|
---|
692 | #ifdef HAVE_GETPEERNAME
|
---|
693 | char buffer[STRERROR_LEN];
|
---|
694 | struct Curl_sockaddr_storage ssrem;
|
---|
695 | curl_socklen_t plen;
|
---|
696 | int port;
|
---|
697 | plen = sizeof(struct Curl_sockaddr_storage);
|
---|
698 | memset(&ssrem, 0, sizeof(ssrem));
|
---|
699 | if(getpeername(sockfd, (struct sockaddr*) &ssrem, &plen)) {
|
---|
700 | int error = SOCKERRNO;
|
---|
701 | failf(data, "getpeername() failed with errno %d: %s",
|
---|
702 | error, Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
703 | return;
|
---|
704 | }
|
---|
705 | if(!Curl_addr2string((struct sockaddr*)&ssrem, plen,
|
---|
706 | conn->primary_ip, &port)) {
|
---|
707 | failf(data, "ssrem inet_ntop() failed with errno %d: %s",
|
---|
708 | errno, Curl_strerror(errno, buffer, sizeof(buffer)));
|
---|
709 | return;
|
---|
710 | }
|
---|
711 | #else
|
---|
712 | (void)data;
|
---|
713 | (void)conn;
|
---|
714 | (void)sockfd;
|
---|
715 | #endif
|
---|
716 | }
|
---|
717 |
|
---|
718 | /* retrieves the start/end point information of a socket of an established
|
---|
719 | connection */
|
---|
720 | void Curl_conninfo_local(struct Curl_easy *data, curl_socket_t sockfd,
|
---|
721 | char *local_ip, int *local_port)
|
---|
722 | {
|
---|
723 | #ifdef HAVE_GETSOCKNAME
|
---|
724 | char buffer[STRERROR_LEN];
|
---|
725 | struct Curl_sockaddr_storage ssloc;
|
---|
726 | curl_socklen_t slen;
|
---|
727 | slen = sizeof(struct Curl_sockaddr_storage);
|
---|
728 | memset(&ssloc, 0, sizeof(ssloc));
|
---|
729 | if(getsockname(sockfd, (struct sockaddr*) &ssloc, &slen)) {
|
---|
730 | int error = SOCKERRNO;
|
---|
731 | failf(data, "getsockname() failed with errno %d: %s",
|
---|
732 | error, Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
733 | return;
|
---|
734 | }
|
---|
735 | if(!Curl_addr2string((struct sockaddr*)&ssloc, slen,
|
---|
736 | local_ip, local_port)) {
|
---|
737 | failf(data, "ssloc inet_ntop() failed with errno %d: %s",
|
---|
738 | errno, Curl_strerror(errno, buffer, sizeof(buffer)));
|
---|
739 | return;
|
---|
740 | }
|
---|
741 | #else
|
---|
742 | (void)data;
|
---|
743 | (void)sockfd;
|
---|
744 | (void)local_ip;
|
---|
745 | (void)local_port;
|
---|
746 | #endif
|
---|
747 | }
|
---|
748 |
|
---|
749 | /* retrieves the start/end point information of a socket of an established
|
---|
750 | connection */
|
---|
751 | void Curl_updateconninfo(struct Curl_easy *data, struct connectdata *conn,
|
---|
752 | curl_socket_t sockfd)
|
---|
753 | {
|
---|
754 | /* 'local_ip' and 'local_port' get filled with local's numerical
|
---|
755 | ip address and port number whenever an outgoing connection is
|
---|
756 | **established** from the primary socket to a remote address. */
|
---|
757 | char local_ip[MAX_IPADR_LEN] = "";
|
---|
758 | int local_port = -1;
|
---|
759 |
|
---|
760 | if(conn->transport == TRNSPRT_TCP) {
|
---|
761 | if(!conn->bits.reuse && !conn->bits.tcp_fastopen)
|
---|
762 | Curl_conninfo_remote(data, conn, sockfd);
|
---|
763 | Curl_conninfo_local(data, sockfd, local_ip, &local_port);
|
---|
764 | } /* end of TCP-only section */
|
---|
765 |
|
---|
766 | /* persist connection info in session handle */
|
---|
767 | Curl_persistconninfo(data, conn, local_ip, local_port);
|
---|
768 | }
|
---|
769 |
|
---|
770 | /* After a TCP connection to the proxy has been verified, this function does
|
---|
771 | the next magic steps. If 'done' isn't set TRUE, it is not done yet and
|
---|
772 | must be called again.
|
---|
773 |
|
---|
774 | Note: this function's sub-functions call failf()
|
---|
775 |
|
---|
776 | */
|
---|
777 | static CURLcode connect_SOCKS(struct Curl_easy *data, int sockindex,
|
---|
778 | bool *done)
|
---|
779 | {
|
---|
780 | CURLcode result = CURLE_OK;
|
---|
781 | #ifndef CURL_DISABLE_PROXY
|
---|
782 | CURLproxycode pxresult = CURLPX_OK;
|
---|
783 | struct connectdata *conn = data->conn;
|
---|
784 | if(conn->bits.socksproxy) {
|
---|
785 | /* for the secondary socket (FTP), use the "connect to host"
|
---|
786 | * but ignore the "connect to port" (use the secondary port)
|
---|
787 | */
|
---|
788 | const char * const host =
|
---|
789 | conn->bits.httpproxy ?
|
---|
790 | conn->http_proxy.host.name :
|
---|
791 | conn->bits.conn_to_host ?
|
---|
792 | conn->conn_to_host.name :
|
---|
793 | sockindex == SECONDARYSOCKET ?
|
---|
794 | conn->secondaryhostname : conn->host.name;
|
---|
795 | const int port =
|
---|
796 | conn->bits.httpproxy ? (int)conn->http_proxy.port :
|
---|
797 | sockindex == SECONDARYSOCKET ? conn->secondary_port :
|
---|
798 | conn->bits.conn_to_port ? conn->conn_to_port :
|
---|
799 | conn->remote_port;
|
---|
800 | switch(conn->socks_proxy.proxytype) {
|
---|
801 | case CURLPROXY_SOCKS5:
|
---|
802 | case CURLPROXY_SOCKS5_HOSTNAME:
|
---|
803 | pxresult = Curl_SOCKS5(conn->socks_proxy.user, conn->socks_proxy.passwd,
|
---|
804 | host, port, sockindex, data, done);
|
---|
805 | break;
|
---|
806 |
|
---|
807 | case CURLPROXY_SOCKS4:
|
---|
808 | case CURLPROXY_SOCKS4A:
|
---|
809 | pxresult = Curl_SOCKS4(conn->socks_proxy.user, host, port, sockindex,
|
---|
810 | data, done);
|
---|
811 | break;
|
---|
812 |
|
---|
813 | default:
|
---|
814 | failf(data, "unknown proxytype option given");
|
---|
815 | result = CURLE_COULDNT_CONNECT;
|
---|
816 | } /* switch proxytype */
|
---|
817 | if(pxresult) {
|
---|
818 | result = CURLE_PROXY;
|
---|
819 | data->info.pxcode = pxresult;
|
---|
820 | }
|
---|
821 | }
|
---|
822 | else
|
---|
823 | #else
|
---|
824 | (void)data;
|
---|
825 | (void)sockindex;
|
---|
826 | #endif /* CURL_DISABLE_PROXY */
|
---|
827 | *done = TRUE; /* no SOCKS proxy, so consider us connected */
|
---|
828 |
|
---|
829 | return result;
|
---|
830 | }
|
---|
831 |
|
---|
832 | /*
|
---|
833 | * post_SOCKS() is called after a successful connect to the peer, which
|
---|
834 | * *could* be a SOCKS proxy
|
---|
835 | */
|
---|
836 | static void post_SOCKS(struct Curl_easy *data,
|
---|
837 | struct connectdata *conn,
|
---|
838 | int sockindex,
|
---|
839 | bool *connected)
|
---|
840 | {
|
---|
841 | conn->bits.tcpconnect[sockindex] = TRUE;
|
---|
842 |
|
---|
843 | *connected = TRUE;
|
---|
844 | if(sockindex == FIRSTSOCKET)
|
---|
845 | Curl_pgrsTime(data, TIMER_CONNECT); /* connect done */
|
---|
846 | Curl_updateconninfo(data, conn, conn->sock[sockindex]);
|
---|
847 | Curl_verboseconnect(data, conn);
|
---|
848 | data->info.numconnects++; /* to track the number of connections made */
|
---|
849 | }
|
---|
850 |
|
---|
851 | /*
|
---|
852 | * Curl_is_connected() checks if the socket has connected.
|
---|
853 | */
|
---|
854 |
|
---|
855 | CURLcode Curl_is_connected(struct Curl_easy *data,
|
---|
856 | struct connectdata *conn,
|
---|
857 | int sockindex,
|
---|
858 | bool *connected)
|
---|
859 | {
|
---|
860 | CURLcode result = CURLE_OK;
|
---|
861 | timediff_t allow;
|
---|
862 | int error = 0;
|
---|
863 | struct curltime now;
|
---|
864 | int rc = 0;
|
---|
865 | unsigned int i;
|
---|
866 |
|
---|
867 | DEBUGASSERT(sockindex >= FIRSTSOCKET && sockindex <= SECONDARYSOCKET);
|
---|
868 |
|
---|
869 | *connected = FALSE; /* a very negative world view is best */
|
---|
870 |
|
---|
871 | if(conn->bits.tcpconnect[sockindex]) {
|
---|
872 | /* we are connected already! */
|
---|
873 | *connected = TRUE;
|
---|
874 | return CURLE_OK;
|
---|
875 | }
|
---|
876 |
|
---|
877 | now = Curl_now();
|
---|
878 |
|
---|
879 | if(SOCKS_STATE(conn->cnnct.state)) {
|
---|
880 | /* still doing SOCKS */
|
---|
881 | result = connect_SOCKS(data, sockindex, connected);
|
---|
882 | if(!result && *connected)
|
---|
883 | post_SOCKS(data, conn, sockindex, connected);
|
---|
884 | return result;
|
---|
885 | }
|
---|
886 |
|
---|
887 | for(i = 0; i<2; i++) {
|
---|
888 | const int other = i ^ 1;
|
---|
889 | if(conn->tempsock[i] == CURL_SOCKET_BAD)
|
---|
890 | continue;
|
---|
891 | error = 0;
|
---|
892 | #ifdef ENABLE_QUIC
|
---|
893 | if(conn->transport == TRNSPRT_QUIC) {
|
---|
894 | result = Curl_quic_is_connected(data, conn, i, connected);
|
---|
895 | if(!result && *connected) {
|
---|
896 | /* use this socket from now on */
|
---|
897 | conn->sock[sockindex] = conn->tempsock[i];
|
---|
898 | conn->ip_addr = conn->tempaddr[i];
|
---|
899 | conn->tempsock[i] = CURL_SOCKET_BAD;
|
---|
900 | post_SOCKS(data, conn, sockindex, connected);
|
---|
901 | connkeep(conn, "HTTP/3 default");
|
---|
902 | return CURLE_OK;
|
---|
903 | }
|
---|
904 | /* When a QUIC connect attempt fails, the better error explanation is in
|
---|
905 | 'result' and not in errno */
|
---|
906 | if(result) {
|
---|
907 | conn->tempsock[i] = CURL_SOCKET_BAD;
|
---|
908 | error = SOCKERRNO;
|
---|
909 | }
|
---|
910 | }
|
---|
911 | else
|
---|
912 | #endif
|
---|
913 | {
|
---|
914 | #ifdef mpeix
|
---|
915 | /* Call this function once now, and ignore the results. We do this to
|
---|
916 | "clear" the error state on the socket so that we can later read it
|
---|
917 | reliably. This is reported necessary on the MPE/iX operating
|
---|
918 | system. */
|
---|
919 | (void)verifyconnect(conn->tempsock[i], NULL);
|
---|
920 | #endif
|
---|
921 |
|
---|
922 | /* check socket for connect */
|
---|
923 | rc = SOCKET_WRITABLE(conn->tempsock[i], 0);
|
---|
924 | }
|
---|
925 |
|
---|
926 | if(rc == 0) { /* no connection yet */
|
---|
927 | if(Curl_timediff(now, conn->connecttime) >=
|
---|
928 | conn->timeoutms_per_addr[i]) {
|
---|
929 | infof(data, "After %" CURL_FORMAT_TIMEDIFF_T
|
---|
930 | "ms connect time, move on!", conn->timeoutms_per_addr[i]);
|
---|
931 | error = ETIMEDOUT;
|
---|
932 | }
|
---|
933 |
|
---|
934 | /* should we try another protocol family? */
|
---|
935 | if(i == 0 && !conn->bits.parallel_connect &&
|
---|
936 | (Curl_timediff(now, conn->connecttime) >=
|
---|
937 | data->set.happy_eyeballs_timeout)) {
|
---|
938 | conn->bits.parallel_connect = TRUE; /* starting now */
|
---|
939 | trynextip(data, conn, sockindex, 1);
|
---|
940 | }
|
---|
941 | }
|
---|
942 | else if(rc == CURL_CSELECT_OUT || conn->bits.tcp_fastopen) {
|
---|
943 | if(verifyconnect(conn->tempsock[i], &error)) {
|
---|
944 | /* we are connected with TCP, awesome! */
|
---|
945 |
|
---|
946 | /* use this socket from now on */
|
---|
947 | conn->sock[sockindex] = conn->tempsock[i];
|
---|
948 | conn->ip_addr = conn->tempaddr[i];
|
---|
949 | conn->tempsock[i] = CURL_SOCKET_BAD;
|
---|
950 | #ifdef ENABLE_IPV6
|
---|
951 | conn->bits.ipv6 = (conn->ip_addr->ai_family == AF_INET6)?TRUE:FALSE;
|
---|
952 | #endif
|
---|
953 |
|
---|
954 | /* close the other socket, if open */
|
---|
955 | if(conn->tempsock[other] != CURL_SOCKET_BAD) {
|
---|
956 | Curl_closesocket(data, conn, conn->tempsock[other]);
|
---|
957 | conn->tempsock[other] = CURL_SOCKET_BAD;
|
---|
958 | }
|
---|
959 |
|
---|
960 | /* see if we need to kick off any SOCKS proxy magic once we
|
---|
961 | connected */
|
---|
962 | result = connect_SOCKS(data, sockindex, connected);
|
---|
963 | if(result || !*connected)
|
---|
964 | return result;
|
---|
965 |
|
---|
966 | post_SOCKS(data, conn, sockindex, connected);
|
---|
967 |
|
---|
968 | return CURLE_OK;
|
---|
969 | }
|
---|
970 | }
|
---|
971 | else if(rc & CURL_CSELECT_ERR) {
|
---|
972 | (void)verifyconnect(conn->tempsock[i], &error);
|
---|
973 | }
|
---|
974 |
|
---|
975 | /*
|
---|
976 | * The connection failed here, we should attempt to connect to the "next
|
---|
977 | * address" for the given host. But first remember the latest error.
|
---|
978 | */
|
---|
979 | if(error) {
|
---|
980 | data->state.os_errno = error;
|
---|
981 | SET_SOCKERRNO(error);
|
---|
982 | if(conn->tempaddr[i]) {
|
---|
983 | CURLcode status;
|
---|
984 | #ifndef CURL_DISABLE_VERBOSE_STRINGS
|
---|
985 | char ipaddress[MAX_IPADR_LEN];
|
---|
986 | char buffer[STRERROR_LEN];
|
---|
987 | Curl_printable_address(conn->tempaddr[i], ipaddress,
|
---|
988 | sizeof(ipaddress));
|
---|
989 | #ifdef ENABLE_QUIC
|
---|
990 | if(conn->transport == TRNSPRT_QUIC) {
|
---|
991 | infof(data, "connect to %s port %u failed: %s",
|
---|
992 | ipaddress, conn->port, curl_easy_strerror(result));
|
---|
993 | }
|
---|
994 | else
|
---|
995 | #endif
|
---|
996 | infof(data, "connect to %s port %u failed: %s",
|
---|
997 | ipaddress, conn->port,
|
---|
998 | Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
999 | #endif
|
---|
1000 |
|
---|
1001 | allow = Curl_timeleft(data, &now, TRUE);
|
---|
1002 | conn->timeoutms_per_addr[i] = conn->tempaddr[i]->ai_next == NULL ?
|
---|
1003 | allow : allow / 2;
|
---|
1004 | ainext(conn, i, TRUE);
|
---|
1005 | status = trynextip(data, conn, sockindex, i);
|
---|
1006 | if((status != CURLE_COULDNT_CONNECT) ||
|
---|
1007 | conn->tempsock[other] == CURL_SOCKET_BAD) {
|
---|
1008 | /* the last attempt failed and no other sockets remain open */
|
---|
1009 | if(!result)
|
---|
1010 | result = status;
|
---|
1011 | }
|
---|
1012 | }
|
---|
1013 | }
|
---|
1014 | }
|
---|
1015 |
|
---|
1016 | /*
|
---|
1017 | * Now that we've checked whether we are connected, check whether we've
|
---|
1018 | * already timed out.
|
---|
1019 | *
|
---|
1020 | * First figure out how long time we have left to connect */
|
---|
1021 |
|
---|
1022 | allow = Curl_timeleft(data, &now, TRUE);
|
---|
1023 |
|
---|
1024 | if(allow < 0) {
|
---|
1025 | /* time-out, bail out, go home */
|
---|
1026 | failf(data, "Connection timeout after %ld ms",
|
---|
1027 | Curl_timediff(now, data->progress.t_startsingle));
|
---|
1028 | return CURLE_OPERATION_TIMEDOUT;
|
---|
1029 | }
|
---|
1030 |
|
---|
1031 | if(result &&
|
---|
1032 | (conn->tempsock[0] == CURL_SOCKET_BAD) &&
|
---|
1033 | (conn->tempsock[1] == CURL_SOCKET_BAD)) {
|
---|
1034 | /* no more addresses to try */
|
---|
1035 | const char *hostname;
|
---|
1036 | char buffer[STRERROR_LEN];
|
---|
1037 | CURLcode failreason = result;
|
---|
1038 |
|
---|
1039 | /* if the first address family runs out of addresses to try before the
|
---|
1040 | happy eyeball timeout, go ahead and try the next family now */
|
---|
1041 | result = trynextip(data, conn, sockindex, 1);
|
---|
1042 | if(!result)
|
---|
1043 | return result;
|
---|
1044 |
|
---|
1045 | result = failreason;
|
---|
1046 |
|
---|
1047 | #ifndef CURL_DISABLE_PROXY
|
---|
1048 | if(conn->bits.socksproxy)
|
---|
1049 | hostname = conn->socks_proxy.host.name;
|
---|
1050 | else if(conn->bits.httpproxy)
|
---|
1051 | hostname = conn->http_proxy.host.name;
|
---|
1052 | else
|
---|
1053 | #endif
|
---|
1054 | if(conn->bits.conn_to_host)
|
---|
1055 | hostname = conn->conn_to_host.name;
|
---|
1056 | else
|
---|
1057 | hostname = conn->host.name;
|
---|
1058 |
|
---|
1059 | failf(data, "Failed to connect to %s port %u after "
|
---|
1060 | "%" CURL_FORMAT_TIMEDIFF_T " ms: %s",
|
---|
1061 | hostname, conn->port,
|
---|
1062 | Curl_timediff(now, data->progress.t_startsingle),
|
---|
1063 | #ifdef ENABLE_QUIC
|
---|
1064 | (conn->transport == TRNSPRT_QUIC) ?
|
---|
1065 | curl_easy_strerror(result) :
|
---|
1066 | #endif
|
---|
1067 | Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
1068 |
|
---|
1069 | Curl_quic_disconnect(data, conn, 0);
|
---|
1070 | Curl_quic_disconnect(data, conn, 1);
|
---|
1071 |
|
---|
1072 | #ifdef WSAETIMEDOUT
|
---|
1073 | if(WSAETIMEDOUT == data->state.os_errno)
|
---|
1074 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
1075 | #elif defined(ETIMEDOUT)
|
---|
1076 | if(ETIMEDOUT == data->state.os_errno)
|
---|
1077 | result = CURLE_OPERATION_TIMEDOUT;
|
---|
1078 | #endif
|
---|
1079 | }
|
---|
1080 | else
|
---|
1081 | result = CURLE_OK; /* still trying */
|
---|
1082 |
|
---|
1083 | return result;
|
---|
1084 | }
|
---|
1085 |
|
---|
1086 | static void tcpnodelay(struct Curl_easy *data, curl_socket_t sockfd)
|
---|
1087 | {
|
---|
1088 | #if defined(TCP_NODELAY)
|
---|
1089 | curl_socklen_t onoff = (curl_socklen_t) 1;
|
---|
1090 | int level = IPPROTO_TCP;
|
---|
1091 | #if !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
1092 | char buffer[STRERROR_LEN];
|
---|
1093 | #else
|
---|
1094 | (void) data;
|
---|
1095 | #endif
|
---|
1096 |
|
---|
1097 | if(setsockopt(sockfd, level, TCP_NODELAY, (void *)&onoff,
|
---|
1098 | sizeof(onoff)) < 0)
|
---|
1099 | infof(data, "Could not set TCP_NODELAY: %s",
|
---|
1100 | Curl_strerror(SOCKERRNO, buffer, sizeof(buffer)));
|
---|
1101 | #else
|
---|
1102 | (void)data;
|
---|
1103 | (void)sockfd;
|
---|
1104 | #endif
|
---|
1105 | }
|
---|
1106 |
|
---|
1107 | #ifdef SO_NOSIGPIPE
|
---|
1108 | /* The preferred method on Mac OS X (10.2 and later) to prevent SIGPIPEs when
|
---|
1109 | sending data to a dead peer (instead of relying on the 4th argument to send
|
---|
1110 | being MSG_NOSIGNAL). Possibly also existing and in use on other BSD
|
---|
1111 | systems? */
|
---|
1112 | static void nosigpipe(struct Curl_easy *data,
|
---|
1113 | curl_socket_t sockfd)
|
---|
1114 | {
|
---|
1115 | int onoff = 1;
|
---|
1116 | if(setsockopt(sockfd, SOL_SOCKET, SO_NOSIGPIPE, (void *)&onoff,
|
---|
1117 | sizeof(onoff)) < 0) {
|
---|
1118 | #if !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
1119 | char buffer[STRERROR_LEN];
|
---|
1120 | infof(data, "Could not set SO_NOSIGPIPE: %s",
|
---|
1121 | Curl_strerror(SOCKERRNO, buffer, sizeof(buffer)));
|
---|
1122 | #endif
|
---|
1123 | }
|
---|
1124 | }
|
---|
1125 | #else
|
---|
1126 | #define nosigpipe(x,y) Curl_nop_stmt
|
---|
1127 | #endif
|
---|
1128 |
|
---|
1129 | #ifdef USE_WINSOCK
|
---|
1130 | /* When you run a program that uses the Windows Sockets API, you may
|
---|
1131 | experience slow performance when you copy data to a TCP server.
|
---|
1132 |
|
---|
1133 | https://support.microsoft.com/kb/823764
|
---|
1134 |
|
---|
1135 | Work-around: Make the Socket Send Buffer Size Larger Than the Program Send
|
---|
1136 | Buffer Size
|
---|
1137 |
|
---|
1138 | The problem described in this knowledge-base is applied only to pre-Vista
|
---|
1139 | Windows. Following function trying to detect OS version and skips
|
---|
1140 | SO_SNDBUF adjustment for Windows Vista and above.
|
---|
1141 | */
|
---|
1142 | #define DETECT_OS_NONE 0
|
---|
1143 | #define DETECT_OS_PREVISTA 1
|
---|
1144 | #define DETECT_OS_VISTA_OR_LATER 2
|
---|
1145 |
|
---|
1146 | void Curl_sndbufset(curl_socket_t sockfd)
|
---|
1147 | {
|
---|
1148 | int val = CURL_MAX_WRITE_SIZE + 32;
|
---|
1149 | int curval = 0;
|
---|
1150 | int curlen = sizeof(curval);
|
---|
1151 |
|
---|
1152 | static int detectOsState = DETECT_OS_NONE;
|
---|
1153 |
|
---|
1154 | if(detectOsState == DETECT_OS_NONE) {
|
---|
1155 | if(curlx_verify_windows_version(6, 0, 0, PLATFORM_WINNT,
|
---|
1156 | VERSION_GREATER_THAN_EQUAL))
|
---|
1157 | detectOsState = DETECT_OS_VISTA_OR_LATER;
|
---|
1158 | else
|
---|
1159 | detectOsState = DETECT_OS_PREVISTA;
|
---|
1160 | }
|
---|
1161 |
|
---|
1162 | if(detectOsState == DETECT_OS_VISTA_OR_LATER)
|
---|
1163 | return;
|
---|
1164 |
|
---|
1165 | if(getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char *)&curval, &curlen) == 0)
|
---|
1166 | if(curval > val)
|
---|
1167 | return;
|
---|
1168 |
|
---|
1169 | setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (const char *)&val, sizeof(val));
|
---|
1170 | }
|
---|
1171 | #endif
|
---|
1172 |
|
---|
1173 | /*
|
---|
1174 | * singleipconnect()
|
---|
1175 | *
|
---|
1176 | * Note that even on connect fail it returns CURLE_OK, but with 'sock' set to
|
---|
1177 | * CURL_SOCKET_BAD. Other errors will however return proper errors.
|
---|
1178 | *
|
---|
1179 | * singleipconnect() connects to the given IP only, and it may return without
|
---|
1180 | * having connected.
|
---|
1181 | */
|
---|
1182 | static CURLcode singleipconnect(struct Curl_easy *data,
|
---|
1183 | struct connectdata *conn,
|
---|
1184 | const struct Curl_addrinfo *ai,
|
---|
1185 | int tempindex)
|
---|
1186 | {
|
---|
1187 | struct Curl_sockaddr_ex addr;
|
---|
1188 | int rc = -1;
|
---|
1189 | int error = 0;
|
---|
1190 | bool isconnected = FALSE;
|
---|
1191 | curl_socket_t sockfd;
|
---|
1192 | CURLcode result;
|
---|
1193 | char ipaddress[MAX_IPADR_LEN];
|
---|
1194 | int port;
|
---|
1195 | bool is_tcp;
|
---|
1196 | #ifdef TCP_FASTOPEN_CONNECT
|
---|
1197 | int optval = 1;
|
---|
1198 | #endif
|
---|
1199 | char buffer[STRERROR_LEN];
|
---|
1200 | curl_socket_t *sockp = &conn->tempsock[tempindex];
|
---|
1201 | *sockp = CURL_SOCKET_BAD;
|
---|
1202 |
|
---|
1203 | result = Curl_socket(data, ai, &addr, &sockfd);
|
---|
1204 | if(result)
|
---|
1205 | return result;
|
---|
1206 |
|
---|
1207 | /* store remote address and port used in this connection attempt */
|
---|
1208 | if(!Curl_addr2string((struct sockaddr*)&addr.sa_addr, addr.addrlen,
|
---|
1209 | ipaddress, &port)) {
|
---|
1210 | /* malformed address or bug in inet_ntop, try next address */
|
---|
1211 | failf(data, "sa_addr inet_ntop() failed with errno %d: %s",
|
---|
1212 | errno, Curl_strerror(errno, buffer, sizeof(buffer)));
|
---|
1213 | Curl_closesocket(data, conn, sockfd);
|
---|
1214 | return CURLE_OK;
|
---|
1215 | }
|
---|
1216 | infof(data, " Trying %s:%d...", ipaddress, port);
|
---|
1217 |
|
---|
1218 | #ifdef ENABLE_IPV6
|
---|
1219 | is_tcp = (addr.family == AF_INET || addr.family == AF_INET6) &&
|
---|
1220 | addr.socktype == SOCK_STREAM;
|
---|
1221 | #else
|
---|
1222 | is_tcp = (addr.family == AF_INET) && addr.socktype == SOCK_STREAM;
|
---|
1223 | #endif
|
---|
1224 | if(is_tcp && data->set.tcp_nodelay)
|
---|
1225 | tcpnodelay(data, sockfd);
|
---|
1226 |
|
---|
1227 | nosigpipe(data, sockfd);
|
---|
1228 |
|
---|
1229 | Curl_sndbufset(sockfd);
|
---|
1230 |
|
---|
1231 | if(is_tcp && data->set.tcp_keepalive)
|
---|
1232 | tcpkeepalive(data, sockfd);
|
---|
1233 |
|
---|
1234 | if(data->set.fsockopt) {
|
---|
1235 | /* activate callback for setting socket options */
|
---|
1236 | Curl_set_in_callback(data, true);
|
---|
1237 | error = data->set.fsockopt(data->set.sockopt_client,
|
---|
1238 | sockfd,
|
---|
1239 | CURLSOCKTYPE_IPCXN);
|
---|
1240 | Curl_set_in_callback(data, false);
|
---|
1241 |
|
---|
1242 | if(error == CURL_SOCKOPT_ALREADY_CONNECTED)
|
---|
1243 | isconnected = TRUE;
|
---|
1244 | else if(error) {
|
---|
1245 | Curl_closesocket(data, conn, sockfd); /* close the socket and bail out */
|
---|
1246 | return CURLE_ABORTED_BY_CALLBACK;
|
---|
1247 | }
|
---|
1248 | }
|
---|
1249 |
|
---|
1250 | /* possibly bind the local end to an IP, interface or port */
|
---|
1251 | if(addr.family == AF_INET
|
---|
1252 | #ifdef ENABLE_IPV6
|
---|
1253 | || addr.family == AF_INET6
|
---|
1254 | #endif
|
---|
1255 | ) {
|
---|
1256 | result = bindlocal(data, sockfd, addr.family,
|
---|
1257 | Curl_ipv6_scope((struct sockaddr*)&addr.sa_addr));
|
---|
1258 | if(result) {
|
---|
1259 | Curl_closesocket(data, conn, sockfd); /* close socket and bail out */
|
---|
1260 | if(result == CURLE_UNSUPPORTED_PROTOCOL) {
|
---|
1261 | /* The address family is not supported on this interface.
|
---|
1262 | We can continue trying addresses */
|
---|
1263 | return CURLE_COULDNT_CONNECT;
|
---|
1264 | }
|
---|
1265 | return result;
|
---|
1266 | }
|
---|
1267 | }
|
---|
1268 |
|
---|
1269 | /* set socket non-blocking */
|
---|
1270 | (void)curlx_nonblock(sockfd, TRUE);
|
---|
1271 |
|
---|
1272 | conn->connecttime = Curl_now();
|
---|
1273 | if(conn->num_addr > 1) {
|
---|
1274 | Curl_expire(data, conn->timeoutms_per_addr[0], EXPIRE_DNS_PER_NAME);
|
---|
1275 | Curl_expire(data, conn->timeoutms_per_addr[1], EXPIRE_DNS_PER_NAME2);
|
---|
1276 | }
|
---|
1277 |
|
---|
1278 | /* Connect TCP and QUIC sockets */
|
---|
1279 | if(!isconnected && (conn->transport != TRNSPRT_UDP)) {
|
---|
1280 | if(conn->bits.tcp_fastopen) {
|
---|
1281 | #if defined(CONNECT_DATA_IDEMPOTENT) /* Darwin */
|
---|
1282 | # if defined(HAVE_BUILTIN_AVAILABLE)
|
---|
1283 | /* while connectx function is available since macOS 10.11 / iOS 9,
|
---|
1284 | it did not have the interface declared correctly until
|
---|
1285 | Xcode 9 / macOS SDK 10.13 */
|
---|
1286 | if(__builtin_available(macOS 10.11, iOS 9.0, tvOS 9.0, watchOS 2.0, *)) {
|
---|
1287 | sa_endpoints_t endpoints;
|
---|
1288 | endpoints.sae_srcif = 0;
|
---|
1289 | endpoints.sae_srcaddr = NULL;
|
---|
1290 | endpoints.sae_srcaddrlen = 0;
|
---|
1291 | endpoints.sae_dstaddr = &addr.sa_addr;
|
---|
1292 | endpoints.sae_dstaddrlen = addr.addrlen;
|
---|
1293 |
|
---|
1294 | rc = connectx(sockfd, &endpoints, SAE_ASSOCID_ANY,
|
---|
1295 | CONNECT_RESUME_ON_READ_WRITE | CONNECT_DATA_IDEMPOTENT,
|
---|
1296 | NULL, 0, NULL, NULL);
|
---|
1297 | }
|
---|
1298 | else {
|
---|
1299 | rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
---|
1300 | }
|
---|
1301 | # else
|
---|
1302 | rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
---|
1303 | # endif /* HAVE_BUILTIN_AVAILABLE */
|
---|
1304 | #elif defined(TCP_FASTOPEN_CONNECT) /* Linux >= 4.11 */
|
---|
1305 | if(setsockopt(sockfd, IPPROTO_TCP, TCP_FASTOPEN_CONNECT,
|
---|
1306 | (void *)&optval, sizeof(optval)) < 0)
|
---|
1307 | infof(data, "Failed to enable TCP Fast Open on fd %d", sockfd);
|
---|
1308 |
|
---|
1309 | rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
---|
1310 | #elif defined(MSG_FASTOPEN) /* old Linux */
|
---|
1311 | if(conn->given->flags & PROTOPT_SSL)
|
---|
1312 | rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
---|
1313 | else
|
---|
1314 | rc = 0; /* Do nothing */
|
---|
1315 | #endif
|
---|
1316 | }
|
---|
1317 | else {
|
---|
1318 | rc = connect(sockfd, &addr.sa_addr, addr.addrlen);
|
---|
1319 | }
|
---|
1320 |
|
---|
1321 | if(-1 == rc)
|
---|
1322 | error = SOCKERRNO;
|
---|
1323 | #ifdef ENABLE_QUIC
|
---|
1324 | else if(conn->transport == TRNSPRT_QUIC) {
|
---|
1325 | /* pass in 'sockfd' separately since it hasn't been put into the
|
---|
1326 | tempsock array at this point */
|
---|
1327 | result = Curl_quic_connect(data, conn, sockfd, tempindex,
|
---|
1328 | &addr.sa_addr, addr.addrlen);
|
---|
1329 | if(result)
|
---|
1330 | error = SOCKERRNO;
|
---|
1331 | }
|
---|
1332 | #endif
|
---|
1333 | }
|
---|
1334 | else {
|
---|
1335 | *sockp = sockfd;
|
---|
1336 | return CURLE_OK;
|
---|
1337 | }
|
---|
1338 |
|
---|
1339 | if(-1 == rc) {
|
---|
1340 | switch(error) {
|
---|
1341 | case EINPROGRESS:
|
---|
1342 | case EWOULDBLOCK:
|
---|
1343 | #if defined(EAGAIN)
|
---|
1344 | #if (EAGAIN) != (EWOULDBLOCK)
|
---|
1345 | /* On some platforms EAGAIN and EWOULDBLOCK are the
|
---|
1346 | * same value, and on others they are different, hence
|
---|
1347 | * the odd #if
|
---|
1348 | */
|
---|
1349 | case EAGAIN:
|
---|
1350 | #endif
|
---|
1351 | #endif
|
---|
1352 | result = CURLE_OK;
|
---|
1353 | break;
|
---|
1354 |
|
---|
1355 | default:
|
---|
1356 | /* unknown error, fallthrough and try another address! */
|
---|
1357 | infof(data, "Immediate connect fail for %s: %s",
|
---|
1358 | ipaddress, Curl_strerror(error, buffer, sizeof(buffer)));
|
---|
1359 | data->state.os_errno = error;
|
---|
1360 |
|
---|
1361 | /* connect failed */
|
---|
1362 | Curl_closesocket(data, conn, sockfd);
|
---|
1363 | result = CURLE_COULDNT_CONNECT;
|
---|
1364 | }
|
---|
1365 | }
|
---|
1366 |
|
---|
1367 | if(!result)
|
---|
1368 | *sockp = sockfd;
|
---|
1369 |
|
---|
1370 | return result;
|
---|
1371 | }
|
---|
1372 |
|
---|
1373 | /*
|
---|
1374 | * TCP connect to the given host with timeout, proxy or remote doesn't matter.
|
---|
1375 | * There might be more than one IP address to try out. Fill in the passed
|
---|
1376 | * pointer with the connected socket.
|
---|
1377 | */
|
---|
1378 |
|
---|
1379 | CURLcode Curl_connecthost(struct Curl_easy *data,
|
---|
1380 | struct connectdata *conn, /* context */
|
---|
1381 | const struct Curl_dns_entry *remotehost)
|
---|
1382 | {
|
---|
1383 | CURLcode result = CURLE_COULDNT_CONNECT;
|
---|
1384 | int i;
|
---|
1385 | timediff_t timeout_ms = Curl_timeleft(data, NULL, TRUE);
|
---|
1386 |
|
---|
1387 | if(timeout_ms < 0) {
|
---|
1388 | /* a precaution, no need to continue if time already is up */
|
---|
1389 | failf(data, "Connection time-out");
|
---|
1390 | return CURLE_OPERATION_TIMEDOUT;
|
---|
1391 | }
|
---|
1392 |
|
---|
1393 | conn->num_addr = Curl_num_addresses(remotehost->addr);
|
---|
1394 | conn->tempaddr[0] = conn->tempaddr[1] = remotehost->addr;
|
---|
1395 | conn->tempsock[0] = conn->tempsock[1] = CURL_SOCKET_BAD;
|
---|
1396 |
|
---|
1397 | /* Max time for the next connection attempt */
|
---|
1398 | conn->timeoutms_per_addr[0] =
|
---|
1399 | conn->tempaddr[0]->ai_next == NULL ? timeout_ms : timeout_ms / 2;
|
---|
1400 | conn->timeoutms_per_addr[1] =
|
---|
1401 | conn->tempaddr[1]->ai_next == NULL ? timeout_ms : timeout_ms / 2;
|
---|
1402 |
|
---|
1403 | if(conn->ip_version == CURL_IPRESOLVE_WHATEVER) {
|
---|
1404 | /* any IP version is allowed */
|
---|
1405 | conn->tempfamily[0] = conn->tempaddr[0]?
|
---|
1406 | conn->tempaddr[0]->ai_family:0;
|
---|
1407 | #ifdef ENABLE_IPV6
|
---|
1408 | conn->tempfamily[1] = conn->tempfamily[0] == AF_INET6 ?
|
---|
1409 | AF_INET : AF_INET6;
|
---|
1410 | #else
|
---|
1411 | conn->tempfamily[1] = AF_UNSPEC;
|
---|
1412 | #endif
|
---|
1413 | }
|
---|
1414 | else {
|
---|
1415 | /* only one IP version is allowed */
|
---|
1416 | conn->tempfamily[0] = (conn->ip_version == CURL_IPRESOLVE_V4) ?
|
---|
1417 | AF_INET :
|
---|
1418 | #ifdef ENABLE_IPV6
|
---|
1419 | AF_INET6;
|
---|
1420 | #else
|
---|
1421 | AF_UNSPEC;
|
---|
1422 | #endif
|
---|
1423 | conn->tempfamily[1] = AF_UNSPEC;
|
---|
1424 |
|
---|
1425 | ainext(conn, 0, FALSE); /* find first address of the right type */
|
---|
1426 | }
|
---|
1427 |
|
---|
1428 | ainext(conn, 1, FALSE); /* assigns conn->tempaddr[1] accordingly */
|
---|
1429 |
|
---|
1430 | DEBUGF(infof(data, "family0 == %s, family1 == %s",
|
---|
1431 | conn->tempfamily[0] == AF_INET ? "v4" : "v6",
|
---|
1432 | conn->tempfamily[1] == AF_INET ? "v4" : "v6"));
|
---|
1433 |
|
---|
1434 | /* get through the list in family order in case of quick failures */
|
---|
1435 | for(i = 0; (i < 2) && result; i++) {
|
---|
1436 | while(conn->tempaddr[i]) {
|
---|
1437 | result = singleipconnect(data, conn, conn->tempaddr[i], i);
|
---|
1438 | if(!result)
|
---|
1439 | break;
|
---|
1440 | ainext(conn, i, TRUE);
|
---|
1441 | }
|
---|
1442 | }
|
---|
1443 | if(result)
|
---|
1444 | return result;
|
---|
1445 |
|
---|
1446 | Curl_expire(data, data->set.happy_eyeballs_timeout,
|
---|
1447 | EXPIRE_HAPPY_EYEBALLS);
|
---|
1448 |
|
---|
1449 | return CURLE_OK;
|
---|
1450 | }
|
---|
1451 |
|
---|
1452 | struct connfind {
|
---|
1453 | long id_tofind;
|
---|
1454 | struct connectdata *found;
|
---|
1455 | };
|
---|
1456 |
|
---|
1457 | static int conn_is_conn(struct Curl_easy *data,
|
---|
1458 | struct connectdata *conn, void *param)
|
---|
1459 | {
|
---|
1460 | struct connfind *f = (struct connfind *)param;
|
---|
1461 | (void)data;
|
---|
1462 | if(conn->connection_id == f->id_tofind) {
|
---|
1463 | f->found = conn;
|
---|
1464 | return 1;
|
---|
1465 | }
|
---|
1466 | return 0;
|
---|
1467 | }
|
---|
1468 |
|
---|
1469 | /*
|
---|
1470 | * Used to extract socket and connectdata struct for the most recent
|
---|
1471 | * transfer on the given Curl_easy.
|
---|
1472 | *
|
---|
1473 | * The returned socket will be CURL_SOCKET_BAD in case of failure!
|
---|
1474 | */
|
---|
1475 | curl_socket_t Curl_getconnectinfo(struct Curl_easy *data,
|
---|
1476 | struct connectdata **connp)
|
---|
1477 | {
|
---|
1478 | DEBUGASSERT(data);
|
---|
1479 |
|
---|
1480 | /* this works for an easy handle:
|
---|
1481 | * - that has been used for curl_easy_perform()
|
---|
1482 | * - that is associated with a multi handle, and whose connection
|
---|
1483 | * was detached with CURLOPT_CONNECT_ONLY
|
---|
1484 | */
|
---|
1485 | if((data->state.lastconnect_id != -1) && (data->multi_easy || data->multi)) {
|
---|
1486 | struct connectdata *c;
|
---|
1487 | struct connfind find;
|
---|
1488 | find.id_tofind = data->state.lastconnect_id;
|
---|
1489 | find.found = NULL;
|
---|
1490 |
|
---|
1491 | Curl_conncache_foreach(data,
|
---|
1492 | data->share && (data->share->specifier
|
---|
1493 | & (1<< CURL_LOCK_DATA_CONNECT))?
|
---|
1494 | &data->share->conn_cache:
|
---|
1495 | data->multi_easy?
|
---|
1496 | &data->multi_easy->conn_cache:
|
---|
1497 | &data->multi->conn_cache, &find, conn_is_conn);
|
---|
1498 |
|
---|
1499 | if(!find.found) {
|
---|
1500 | data->state.lastconnect_id = -1;
|
---|
1501 | return CURL_SOCKET_BAD;
|
---|
1502 | }
|
---|
1503 |
|
---|
1504 | c = find.found;
|
---|
1505 | if(connp)
|
---|
1506 | /* only store this if the caller cares for it */
|
---|
1507 | *connp = c;
|
---|
1508 | return c->sock[FIRSTSOCKET];
|
---|
1509 | }
|
---|
1510 | return CURL_SOCKET_BAD;
|
---|
1511 | }
|
---|
1512 |
|
---|
1513 | /*
|
---|
1514 | * Check if a connection seems to be alive.
|
---|
1515 | */
|
---|
1516 | bool Curl_connalive(struct connectdata *conn)
|
---|
1517 | {
|
---|
1518 | /* First determine if ssl */
|
---|
1519 | if(conn->ssl[FIRSTSOCKET].use) {
|
---|
1520 | /* use the SSL context */
|
---|
1521 | if(!Curl_ssl_check_cxn(conn))
|
---|
1522 | return false; /* FIN received */
|
---|
1523 | }
|
---|
1524 | /* Minix 3.1 doesn't support any flags on recv; just assume socket is OK */
|
---|
1525 | #ifdef MSG_PEEK
|
---|
1526 | else if(conn->sock[FIRSTSOCKET] == CURL_SOCKET_BAD)
|
---|
1527 | return false;
|
---|
1528 | else {
|
---|
1529 | /* use the socket */
|
---|
1530 | char buf;
|
---|
1531 | if(recv((RECV_TYPE_ARG1)conn->sock[FIRSTSOCKET], (RECV_TYPE_ARG2)&buf,
|
---|
1532 | (RECV_TYPE_ARG3)1, (RECV_TYPE_ARG4)MSG_PEEK) == 0) {
|
---|
1533 | return false; /* FIN received */
|
---|
1534 | }
|
---|
1535 | }
|
---|
1536 | #endif
|
---|
1537 | return true;
|
---|
1538 | }
|
---|
1539 |
|
---|
1540 | /*
|
---|
1541 | * Close a socket.
|
---|
1542 | *
|
---|
1543 | * 'conn' can be NULL, beware!
|
---|
1544 | */
|
---|
1545 | int Curl_closesocket(struct Curl_easy *data, struct connectdata *conn,
|
---|
1546 | curl_socket_t sock)
|
---|
1547 | {
|
---|
1548 | if(conn && conn->fclosesocket) {
|
---|
1549 | if((sock == conn->sock[SECONDARYSOCKET]) && conn->bits.sock_accepted)
|
---|
1550 | /* if this socket matches the second socket, and that was created with
|
---|
1551 | accept, then we MUST NOT call the callback but clear the accepted
|
---|
1552 | status */
|
---|
1553 | conn->bits.sock_accepted = FALSE;
|
---|
1554 | else {
|
---|
1555 | int rc;
|
---|
1556 | Curl_multi_closed(data, sock);
|
---|
1557 | Curl_set_in_callback(data, true);
|
---|
1558 | rc = conn->fclosesocket(conn->closesocket_client, sock);
|
---|
1559 | Curl_set_in_callback(data, false);
|
---|
1560 | return rc;
|
---|
1561 | }
|
---|
1562 | }
|
---|
1563 |
|
---|
1564 | if(conn)
|
---|
1565 | /* tell the multi-socket code about this */
|
---|
1566 | Curl_multi_closed(data, sock);
|
---|
1567 |
|
---|
1568 | sclose(sock);
|
---|
1569 |
|
---|
1570 | return 0;
|
---|
1571 | }
|
---|
1572 |
|
---|
1573 | /*
|
---|
1574 | * Create a socket based on info from 'conn' and 'ai'.
|
---|
1575 | *
|
---|
1576 | * 'addr' should be a pointer to the correct struct to get data back, or NULL.
|
---|
1577 | * 'sockfd' must be a pointer to a socket descriptor.
|
---|
1578 | *
|
---|
1579 | * If the open socket callback is set, used that!
|
---|
1580 | *
|
---|
1581 | */
|
---|
1582 | CURLcode Curl_socket(struct Curl_easy *data,
|
---|
1583 | const struct Curl_addrinfo *ai,
|
---|
1584 | struct Curl_sockaddr_ex *addr,
|
---|
1585 | curl_socket_t *sockfd)
|
---|
1586 | {
|
---|
1587 | struct connectdata *conn = data->conn;
|
---|
1588 | struct Curl_sockaddr_ex dummy;
|
---|
1589 |
|
---|
1590 | if(!addr)
|
---|
1591 | /* if the caller doesn't want info back, use a local temp copy */
|
---|
1592 | addr = &dummy;
|
---|
1593 |
|
---|
1594 | /*
|
---|
1595 | * The Curl_sockaddr_ex structure is basically libcurl's external API
|
---|
1596 | * curl_sockaddr structure with enough space available to directly hold
|
---|
1597 | * any protocol-specific address structures. The variable declared here
|
---|
1598 | * will be used to pass / receive data to/from the fopensocket callback
|
---|
1599 | * if this has been set, before that, it is initialized from parameters.
|
---|
1600 | */
|
---|
1601 |
|
---|
1602 | addr->family = ai->ai_family;
|
---|
1603 | addr->socktype = (conn->transport == TRNSPRT_TCP) ? SOCK_STREAM : SOCK_DGRAM;
|
---|
1604 | addr->protocol = conn->transport != TRNSPRT_TCP ? IPPROTO_UDP :
|
---|
1605 | ai->ai_protocol;
|
---|
1606 | addr->addrlen = ai->ai_addrlen;
|
---|
1607 |
|
---|
1608 | if(addr->addrlen > sizeof(struct Curl_sockaddr_storage))
|
---|
1609 | addr->addrlen = sizeof(struct Curl_sockaddr_storage);
|
---|
1610 | memcpy(&addr->sa_addr, ai->ai_addr, addr->addrlen);
|
---|
1611 |
|
---|
1612 | if(data->set.fopensocket) {
|
---|
1613 | /*
|
---|
1614 | * If the opensocket callback is set, all the destination address
|
---|
1615 | * information is passed to the callback. Depending on this information the
|
---|
1616 | * callback may opt to abort the connection, this is indicated returning
|
---|
1617 | * CURL_SOCKET_BAD; otherwise it will return a not-connected socket. When
|
---|
1618 | * the callback returns a valid socket the destination address information
|
---|
1619 | * might have been changed and this 'new' address will actually be used
|
---|
1620 | * here to connect.
|
---|
1621 | */
|
---|
1622 | Curl_set_in_callback(data, true);
|
---|
1623 | *sockfd = data->set.fopensocket(data->set.opensocket_client,
|
---|
1624 | CURLSOCKTYPE_IPCXN,
|
---|
1625 | (struct curl_sockaddr *)addr);
|
---|
1626 | Curl_set_in_callback(data, false);
|
---|
1627 | }
|
---|
1628 | else
|
---|
1629 | /* opensocket callback not set, so simply create the socket now */
|
---|
1630 | *sockfd = socket(addr->family, addr->socktype, addr->protocol);
|
---|
1631 |
|
---|
1632 | if(*sockfd == CURL_SOCKET_BAD)
|
---|
1633 | /* no socket, no connection */
|
---|
1634 | return CURLE_COULDNT_CONNECT;
|
---|
1635 |
|
---|
1636 | if(conn->transport == TRNSPRT_QUIC) {
|
---|
1637 | /* QUIC sockets need to be nonblocking */
|
---|
1638 | (void)curlx_nonblock(*sockfd, TRUE);
|
---|
1639 | }
|
---|
1640 |
|
---|
1641 | #if defined(ENABLE_IPV6) && defined(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID)
|
---|
1642 | if(conn->scope_id && (addr->family == AF_INET6)) {
|
---|
1643 | struct sockaddr_in6 * const sa6 = (void *)&addr->sa_addr;
|
---|
1644 | sa6->sin6_scope_id = conn->scope_id;
|
---|
1645 | }
|
---|
1646 | #endif
|
---|
1647 |
|
---|
1648 | #if defined(__linux__) && defined(IP_RECVERR)
|
---|
1649 | if(addr->socktype == SOCK_DGRAM) {
|
---|
1650 | int one = 1;
|
---|
1651 | switch(addr->family) {
|
---|
1652 | case AF_INET:
|
---|
1653 | (void)setsockopt(*sockfd, SOL_IP, IP_RECVERR, &one, sizeof(one));
|
---|
1654 | break;
|
---|
1655 | case AF_INET6:
|
---|
1656 | (void)setsockopt(*sockfd, SOL_IPV6, IPV6_RECVERR, &one, sizeof(one));
|
---|
1657 | break;
|
---|
1658 | }
|
---|
1659 | }
|
---|
1660 | #endif
|
---|
1661 |
|
---|
1662 | return CURLE_OK;
|
---|
1663 | }
|
---|
1664 |
|
---|
1665 | /*
|
---|
1666 | * Curl_conncontrol() marks streams or connection for closure.
|
---|
1667 | */
|
---|
1668 | void Curl_conncontrol(struct connectdata *conn,
|
---|
1669 | int ctrl /* see defines in header */
|
---|
1670 | #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
1671 | , const char *reason
|
---|
1672 | #endif
|
---|
1673 | )
|
---|
1674 | {
|
---|
1675 | /* close if a connection, or a stream that isn't multiplexed. */
|
---|
1676 | /* This function will be called both before and after this connection is
|
---|
1677 | associated with a transfer. */
|
---|
1678 | bool closeit;
|
---|
1679 | DEBUGASSERT(conn);
|
---|
1680 | #if defined(DEBUGBUILD) && !defined(CURL_DISABLE_VERBOSE_STRINGS)
|
---|
1681 | (void)reason; /* useful for debugging */
|
---|
1682 | #endif
|
---|
1683 | closeit = (ctrl == CONNCTRL_CONNECTION) ||
|
---|
1684 | ((ctrl == CONNCTRL_STREAM) && !(conn->handler->flags & PROTOPT_STREAM));
|
---|
1685 | if((ctrl == CONNCTRL_STREAM) &&
|
---|
1686 | (conn->handler->flags & PROTOPT_STREAM))
|
---|
1687 | ;
|
---|
1688 | else if((bit)closeit != conn->bits.close) {
|
---|
1689 | conn->bits.close = closeit; /* the only place in the source code that
|
---|
1690 | should assign this bit */
|
---|
1691 | }
|
---|
1692 | }
|
---|
1693 |
|
---|
1694 | /* Data received can be cached at various levels, so check them all here. */
|
---|
1695 | bool Curl_conn_data_pending(struct connectdata *conn, int sockindex)
|
---|
1696 | {
|
---|
1697 | int readable;
|
---|
1698 | DEBUGASSERT(conn);
|
---|
1699 |
|
---|
1700 | if(Curl_ssl_data_pending(conn, sockindex) ||
|
---|
1701 | Curl_recv_has_postponed_data(conn, sockindex))
|
---|
1702 | return true;
|
---|
1703 |
|
---|
1704 | readable = SOCKET_READABLE(conn->sock[sockindex], 0);
|
---|
1705 | return (readable > 0 && (readable & CURL_CSELECT_IN));
|
---|
1706 | }
|
---|