Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/hostip6.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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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 - 2019, 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 /***********************************************************************
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26 * Only for IPv6-enabled builds
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27 **********************************************************************/
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28 #ifdef CURLRES_IPV6
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29
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30 #ifdef HAVE_NETINET_IN_H
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31 #include <netinet/in.h>
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32 #endif
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33 #ifdef HAVE_NETDB_H
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34 #include <netdb.h>
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35 #endif
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36 #ifdef HAVE_ARPA_INET_H
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37 #include <arpa/inet.h>
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38 #endif
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39 #ifdef __VMS
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40 #include <in.h>
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41 #include <inet.h>
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42 #endif
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43
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44 #ifdef HAVE_PROCESS_H
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45 #include <process.h>
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46 #endif
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47
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48 #include "urldata.h"
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49 #include "sendf.h"
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50 #include "hostip.h"
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51 #include "hash.h"
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52 #include "share.h"
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53 #include "strerror.h"
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54 #include "url.h"
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55 #include "inet_pton.h"
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56 #include "connect.h"
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57 /* The last 3 #include files should be in this order */
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58 #include "curl_printf.h"
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59 #include "curl_memory.h"
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60 #include "memdebug.h"
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61
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62 /*
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63 * Curl_ipv6works() returns TRUE if IPv6 seems to work.
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64 */
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65 bool Curl_ipv6works(void)
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66 {
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67 /* the nature of most system is that IPv6 status doesn't come and go
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68 during a program's lifetime so we only probe the first time and then we
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69 have the info kept for fast re-use */
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70 static int ipv6_works = -1;
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71 if(-1 == ipv6_works) {
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72 /* probe to see if we have a working IPv6 stack */
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73 curl_socket_t s = socket(PF_INET6, SOCK_DGRAM, 0);
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74 if(s == CURL_SOCKET_BAD)
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75 /* an IPv6 address was requested but we can't get/use one */
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76 ipv6_works = 0;
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77 else {
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78 ipv6_works = 1;
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79 Curl_closesocket(NULL, s);
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80 }
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81 }
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82 return (ipv6_works>0)?TRUE:FALSE;
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83 }
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84
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85 /*
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86 * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
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87 * been set and returns TRUE if they are OK.
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88 */
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89 bool Curl_ipvalid(struct connectdata *conn)
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90 {
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91 if(conn->ip_version == CURL_IPRESOLVE_V6)
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92 return Curl_ipv6works();
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93
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94 return TRUE;
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95 }
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96
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97 #if defined(CURLRES_SYNCH)
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98
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99 #ifdef DEBUG_ADDRINFO
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100 static void dump_addrinfo(struct connectdata *conn, const Curl_addrinfo *ai)
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101 {
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102 printf("dump_addrinfo:\n");
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103 for(; ai; ai = ai->ai_next) {
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104 char buf[INET6_ADDRSTRLEN];
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105 printf(" fam %2d, CNAME %s, ",
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106 ai->ai_family, ai->ai_canonname ? ai->ai_canonname : "<none>");
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diff changeset
107 if(Curl_printable_address(ai, buf, sizeof(buf)))
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108 printf("%s\n", buf);
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109 else {
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110 char buffer[STRERROR_LEN];
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111 printf("failed; %s\n",
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112 Curl_strerror(SOCKERRNO, buffer, sizeof(buffer)));
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113 }
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114 }
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115 }
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116 #else
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117 #define dump_addrinfo(x,y) Curl_nop_stmt
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118 #endif
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119
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120 /*
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121 * Curl_getaddrinfo() when built IPv6-enabled (non-threading and
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122 * non-ares version).
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123 *
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124 * Returns name information about the given hostname and port number. If
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125 * successful, the 'addrinfo' is returned and the forth argument will point to
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126 * memory we need to free after use. That memory *MUST* be freed with
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127 * Curl_freeaddrinfo(), nothing else.
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128 */
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129 Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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130 const char *hostname,
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131 int port,
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132 int *waitp)
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133 {
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134 struct addrinfo hints;
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135 Curl_addrinfo *res;
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136 int error;
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137 char sbuf[12];
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138 char *sbufptr = NULL;
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139 #ifndef USE_RESOLVE_ON_IPS
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140 char addrbuf[128];
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141 #endif
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142 int pf;
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143 #if !defined(CURL_DISABLE_VERBOSE_STRINGS)
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144 struct Curl_easy *data = conn->data;
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145 #endif
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146
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147 *waitp = 0; /* synchronous response only */
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148
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149 /* Check if a limited name resolve has been requested */
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150 switch(conn->ip_version) {
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151 case CURL_IPRESOLVE_V4:
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152 pf = PF_INET;
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153 break;
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154 case CURL_IPRESOLVE_V6:
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155 pf = PF_INET6;
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156 break;
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157 default:
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158 pf = PF_UNSPEC;
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159 break;
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160 }
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161
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162 if((pf != PF_INET) && !Curl_ipv6works())
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163 /* The stack seems to be a non-IPv6 one */
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164 pf = PF_INET;
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165
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166 memset(&hints, 0, sizeof(hints));
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167 hints.ai_family = pf;
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168 hints.ai_socktype = (conn->transport == TRNSPRT_TCP) ?
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169 SOCK_STREAM : SOCK_DGRAM;
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170
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171 #ifndef USE_RESOLVE_ON_IPS
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172 /*
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173 * The AI_NUMERICHOST must not be set to get synthesized IPv6 address from
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174 * an IPv4 address on iOS and Mac OS X.
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175 */
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diff changeset
176 if((1 == Curl_inet_pton(AF_INET, hostname, addrbuf)) ||
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177 (1 == Curl_inet_pton(AF_INET6, hostname, addrbuf))) {
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178 /* the given address is numerical only, prevent a reverse lookup */
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diff changeset
179 hints.ai_flags = AI_NUMERICHOST;
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180 }
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diff changeset
181 #endif
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182
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diff changeset
183 if(port) {
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diff changeset
184 msnprintf(sbuf, sizeof(sbuf), "%d", port);
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diff changeset
185 sbufptr = sbuf;
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186 }
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187
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diff changeset
188 error = Curl_getaddrinfo_ex(hostname, sbufptr, &hints, &res);
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diff changeset
189 if(error) {
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diff changeset
190 infof(data, "getaddrinfo(3) failed for %s:%d\n", hostname, port);
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
191 return NULL;
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diff changeset
192 }
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diff changeset
193
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diff changeset
194 if(port) {
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
195 Curl_addrinfo_set_port(res, port);
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diff changeset
196 }
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diff changeset
197
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
198 dump_addrinfo(conn, res);
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diff changeset
199
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parents:
diff changeset
200 return res;
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diff changeset
201 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
202 #endif /* CURLRES_SYNCH */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
203
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
204 #endif /* CURLRES_IPV6 */