Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/hostip.h @ 7:5ab937c03c27

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Apply full RELRO to all generated binaries. Also strip the generated binaries.
author Franz Glasner <fzglas.hg@dom66.de>
date Tue, 16 Sep 2025 12:37:32 +0200
parents b50eed0cc0ef
children
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1 #ifndef HEADER_CURL_HOSTIP_H
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2 #define HEADER_CURL_HOSTIP_H
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3 /***************************************************************************
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4 * _ _ ____ _
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5 * Project ___| | | | _ \| |
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6 * / __| | | | |_) | |
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7 * | (__| |_| | _ <| |___
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8 * \___|\___/|_| \_\_____|
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9 *
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10 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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11 *
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12 * This software is licensed as described in the file COPYING, which
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13 * you should have received as part of this distribution. The terms
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14 * are also available at https://curl.haxx.se/docs/copyright.html.
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15 *
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16 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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17 * copies of the Software, and permit persons to whom the Software is
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18 * furnished to do so, under the terms of the COPYING file.
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19 *
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20 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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21 * KIND, either express or implied.
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22 *
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23 ***************************************************************************/
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24
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25 #include "curl_setup.h"
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26 #include "hash.h"
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27 #include "curl_addrinfo.h"
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28 #include "timeval.h" /* for timediff_t */
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29 #include "asyn.h"
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31 #ifdef HAVE_SETJMP_H
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32 #include <setjmp.h>
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33 #endif
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34
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35 #ifdef NETWARE
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36 #undef in_addr_t
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37 #define in_addr_t unsigned long
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38 #endif
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39
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40 /* Allocate enough memory to hold the full name information structs and
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41 * everything. OSF1 is known to require at least 8872 bytes. The buffer
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42 * required for storing all possible aliases and IP numbers is according to
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43 * Stevens' Unix Network Programming 2nd edition, p. 304: 8192 bytes!
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44 */
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45 #define CURL_HOSTENT_SIZE 9000
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46
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47 #define CURL_TIMEOUT_RESOLVE 300 /* when using asynch methods, we allow this
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48 many seconds for a name resolve */
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49
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50 #define CURL_ASYNC_SUCCESS CURLE_OK
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51
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52 struct addrinfo;
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53 struct hostent;
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54 struct Curl_easy;
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55 struct connectdata;
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56
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57 /*
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58 * Curl_global_host_cache_init() initializes and sets up a global DNS cache.
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59 * Global DNS cache is general badness. Do not use. This will be removed in
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60 * a future version. Use the share interface instead!
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61 *
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62 * Returns a struct curl_hash pointer on success, NULL on failure.
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63 */
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64 struct curl_hash *Curl_global_host_cache_init(void);
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65
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66 struct Curl_dns_entry {
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67 Curl_addrinfo *addr;
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68 /* timestamp == 0 -- CURLOPT_RESOLVE entry, doesn't timeout */
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69 time_t timestamp;
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70 /* use-counter, use Curl_resolv_unlock to release reference */
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71 long inuse;
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72 };
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73
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74 /*
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75 * Curl_resolv() returns an entry with the info for the specified host
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76 * and port.
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77 *
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78 * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
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79 * use, or we'll leak memory!
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80 */
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81 /* return codes */
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82 #define CURLRESOLV_TIMEDOUT -2
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83 #define CURLRESOLV_ERROR -1
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84 #define CURLRESOLV_RESOLVED 0
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85 #define CURLRESOLV_PENDING 1
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86 int Curl_resolv(struct connectdata *conn,
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87 const char *hostname,
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88 int port,
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89 bool allowDOH,
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90 struct Curl_dns_entry **dnsentry);
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91 int Curl_resolv_timeout(struct connectdata *conn, const char *hostname,
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92 int port, struct Curl_dns_entry **dnsentry,
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93 timediff_t timeoutms);
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94
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95 #ifdef CURLRES_IPV6
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96 /*
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97 * Curl_ipv6works() returns TRUE if IPv6 seems to work.
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98 */
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99 bool Curl_ipv6works(void);
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100 #else
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101 #define Curl_ipv6works() FALSE
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102 #endif
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103
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104 /*
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105 * Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
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106 * been set and returns TRUE if they are OK.
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107 */
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108 bool Curl_ipvalid(struct connectdata *conn);
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109
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110
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111 /*
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112 * Curl_getaddrinfo() is the generic low-level name resolve API within this
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113 * source file. There are several versions of this function - for different
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114 * name resolve layers (selected at build-time). They all take this same set
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115 * of arguments
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116 */
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117 Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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118 const char *hostname,
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119 int port,
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120 int *waitp);
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121
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122
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123 /* unlock a previously resolved dns entry */
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124 void Curl_resolv_unlock(struct Curl_easy *data,
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125 struct Curl_dns_entry *dns);
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126
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127 /* init a new dns cache and return success */
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128 int Curl_mk_dnscache(struct curl_hash *hash);
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129
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130 /* prune old entries from the DNS cache */
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131 void Curl_hostcache_prune(struct Curl_easy *data);
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132
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133 /* Return # of addresses in a Curl_addrinfo struct */
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134 int Curl_num_addresses(const Curl_addrinfo *addr);
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135
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136 #if defined(CURLDEBUG) && defined(HAVE_GETNAMEINFO)
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137 int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
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138 GETNAMEINFO_TYPE_ARG2 salen,
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139 char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
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140 char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
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141 GETNAMEINFO_TYPE_ARG7 flags,
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142 int line, const char *source);
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143 #endif
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144
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145 /* IPv4 threadsafe resolve function used for synch and asynch builds */
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146 Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname, int port);
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147
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148 CURLcode Curl_once_resolved(struct connectdata *conn, bool *protocol_connect);
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149
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150 /*
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151 * Curl_addrinfo_callback() is used when we build with any asynch specialty.
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152 * Handles end of async request processing. Inserts ai into hostcache when
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153 * status is CURL_ASYNC_SUCCESS. Twiddles fields in conn to indicate async
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154 * request completed whether successful or failed.
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155 */
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156 CURLcode Curl_addrinfo_callback(struct connectdata *conn,
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157 int status,
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158 Curl_addrinfo *ai);
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159
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160 /*
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161 * Curl_printable_address() returns a printable version of the 1st address
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162 * given in the 'ip' argument. The result will be stored in the buf that is
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163 * bufsize bytes big.
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164 */
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165 const char *Curl_printable_address(const Curl_addrinfo *ip,
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166 char *buf, size_t bufsize);
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167
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168 /*
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169 * Curl_fetch_addr() fetches a 'Curl_dns_entry' already in the DNS cache.
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170 *
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171 * Returns the Curl_dns_entry entry pointer or NULL if not in the cache.
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172 *
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173 * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
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174 * use, or we'll leak memory!
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175 */
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176 struct Curl_dns_entry *
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177 Curl_fetch_addr(struct connectdata *conn,
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178 const char *hostname,
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179 int port);
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180
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181 /*
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182 * Curl_cache_addr() stores a 'Curl_addrinfo' struct in the DNS cache.
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183 *
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184 * Returns the Curl_dns_entry entry pointer or NULL if the storage failed.
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185 */
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186 struct Curl_dns_entry *
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187 Curl_cache_addr(struct Curl_easy *data, Curl_addrinfo *addr,
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188 const char *hostname, int port);
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189
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190 #ifndef INADDR_NONE
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191 #define CURL_INADDR_NONE (in_addr_t) ~0
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192 #else
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193 #define CURL_INADDR_NONE INADDR_NONE
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194 #endif
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195
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196 #ifdef HAVE_SIGSETJMP
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197 /* Forward-declaration of variable defined in hostip.c. Beware this
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198 * is a global and unique instance. This is used to store the return
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199 * address that we can jump back to from inside a signal handler.
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200 * This is not thread-safe stuff.
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201 */
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202 extern sigjmp_buf curl_jmpenv;
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203 #endif
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204
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205 /*
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206 * Function provided by the resolver backend to set DNS servers to use.
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207 */
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208 CURLcode Curl_set_dns_servers(struct Curl_easy *data, char *servers);
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209
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210 /*
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211 * Function provided by the resolver backend to set
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212 * outgoing interface to use for DNS requests
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213 */
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214 CURLcode Curl_set_dns_interface(struct Curl_easy *data,
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215 const char *interf);
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216
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217 /*
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218 * Function provided by the resolver backend to set
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219 * local IPv4 address to use as source address for DNS requests
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220 */
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221 CURLcode Curl_set_dns_local_ip4(struct Curl_easy *data,
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222 const char *local_ip4);
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223
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224 /*
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225 * Function provided by the resolver backend to set
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226 * local IPv6 address to use as source address for DNS requests
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227 */
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228 CURLcode Curl_set_dns_local_ip6(struct Curl_easy *data,
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229 const char *local_ip6);
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230
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231 /*
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232 * Clean off entries from the cache
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233 */
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234 void Curl_hostcache_clean(struct Curl_easy *data, struct curl_hash *hash);
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235
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236 /*
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237 * Populate the cache with specified entries from CURLOPT_RESOLVE.
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238 */
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239 CURLcode Curl_loadhostpairs(struct Curl_easy *data);
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240
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241 CURLcode Curl_resolv_check(struct connectdata *conn,
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242 struct Curl_dns_entry **dns);
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243 int Curl_resolv_getsock(struct connectdata *conn,
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244 curl_socket_t *socks);
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245
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246 #endif /* HEADER_CURL_HOSTIP_H */