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 - 2017, 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 | #include <curl/curl.h>
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26 |
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27 | #ifdef HAVE_NETINET_IN_H
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28 | # include <netinet/in.h>
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29 | #endif
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30 | #ifdef HAVE_NETDB_H
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31 | # include <netdb.h>
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32 | #endif
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33 | #ifdef HAVE_ARPA_INET_H
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34 | # include <arpa/inet.h>
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35 | #endif
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36 | #ifdef HAVE_SYS_UN_H
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37 | # include <sys/un.h>
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38 | #endif
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39 |
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40 | #ifdef __VMS
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41 | # include <in.h>
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42 | # include <inet.h>
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43 | #endif
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44 |
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45 | #if defined(NETWARE) && defined(__NOVELL_LIBC__)
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46 | # undef in_addr_t
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47 | # define in_addr_t unsigned long
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48 | #endif
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49 |
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50 | #include <stddef.h>
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51 |
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52 | #include "curl_addrinfo.h"
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53 | #include "inet_pton.h"
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54 | #include "warnless.h"
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55 | /* The last 3 #include files should be in this order */
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56 | #include "curl_printf.h"
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57 | #include "curl_memory.h"
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58 | #include "memdebug.h"
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59 |
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60 | /*
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61 | * Curl_freeaddrinfo()
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62 | *
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63 | * This is used to free a linked list of Curl_addrinfo structs along
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64 | * with all its associated allocated storage. This function should be
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65 | * called once for each successful call to Curl_getaddrinfo_ex() or to
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66 | * any function call which actually allocates a Curl_addrinfo struct.
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67 | */
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68 |
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69 | #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
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70 | defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
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71 | /* workaround icc 9.1 optimizer issue */
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72 | # define vqualifier volatile
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73 | #else
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74 | # define vqualifier
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75 | #endif
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76 |
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77 | void
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78 | Curl_freeaddrinfo(Curl_addrinfo *cahead)
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79 | {
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80 | Curl_addrinfo *vqualifier canext;
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81 | Curl_addrinfo *ca;
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82 |
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83 | for(ca = cahead; ca != NULL; ca = canext) {
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84 | free(ca->ai_addr);
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85 | free(ca->ai_canonname);
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86 | canext = ca->ai_next;
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87 |
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88 | free(ca);
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89 | }
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90 | }
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91 |
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92 |
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93 | #ifdef HAVE_GETADDRINFO
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94 | /*
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95 | * Curl_getaddrinfo_ex()
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96 | *
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97 | * This is a wrapper function around system's getaddrinfo(), with
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98 | * the only difference that instead of returning a linked list of
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99 | * addrinfo structs this one returns a linked list of Curl_addrinfo
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100 | * ones. The memory allocated by this function *MUST* be free'd with
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101 | * Curl_freeaddrinfo(). For each successful call to this function
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102 | * there must be an associated call later to Curl_freeaddrinfo().
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103 | *
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104 | * There should be no single call to system's getaddrinfo() in the
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105 | * whole library, any such call should be 'routed' through this one.
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106 | */
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107 |
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108 | int
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109 | Curl_getaddrinfo_ex(const char *nodename,
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110 | const char *servname,
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111 | const struct addrinfo *hints,
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112 | Curl_addrinfo **result)
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113 | {
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114 | const struct addrinfo *ai;
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115 | struct addrinfo *aihead;
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116 | Curl_addrinfo *cafirst = NULL;
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117 | Curl_addrinfo *calast = NULL;
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118 | Curl_addrinfo *ca;
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119 | size_t ss_size;
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120 | int error;
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121 |
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122 | *result = NULL; /* assume failure */
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123 |
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124 | error = getaddrinfo(nodename, servname, hints, &aihead);
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125 | if(error)
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126 | return error;
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127 |
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128 | /* traverse the addrinfo list */
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129 |
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130 | for(ai = aihead; ai != NULL; ai = ai->ai_next) {
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131 |
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132 | /* ignore elements with unsupported address family, */
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133 | /* settle family-specific sockaddr structure size. */
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134 | if(ai->ai_family == AF_INET)
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135 | ss_size = sizeof(struct sockaddr_in);
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136 | #ifdef ENABLE_IPV6
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137 | else if(ai->ai_family == AF_INET6)
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138 | ss_size = sizeof(struct sockaddr_in6);
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139 | #endif
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140 | else
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141 | continue;
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142 |
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143 | /* ignore elements without required address info */
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144 | if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
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145 | continue;
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146 |
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147 | /* ignore elements with bogus address size */
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148 | if((size_t)ai->ai_addrlen < ss_size)
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149 | continue;
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150 |
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151 | ca = malloc(sizeof(Curl_addrinfo));
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152 | if(!ca) {
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153 | error = EAI_MEMORY;
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154 | break;
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155 | }
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156 |
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157 | /* copy each structure member individually, member ordering, */
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158 | /* size, or padding might be different for each platform. */
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159 |
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160 | ca->ai_flags = ai->ai_flags;
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161 | ca->ai_family = ai->ai_family;
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162 | ca->ai_socktype = ai->ai_socktype;
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163 | ca->ai_protocol = ai->ai_protocol;
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164 | ca->ai_addrlen = (curl_socklen_t)ss_size;
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165 | ca->ai_addr = NULL;
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166 | ca->ai_canonname = NULL;
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167 | ca->ai_next = NULL;
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168 |
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169 | ca->ai_addr = malloc(ss_size);
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170 | if(!ca->ai_addr) {
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171 | error = EAI_MEMORY;
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172 | free(ca);
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173 | break;
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174 | }
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175 | memcpy(ca->ai_addr, ai->ai_addr, ss_size);
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176 |
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177 | if(ai->ai_canonname != NULL) {
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178 | ca->ai_canonname = strdup(ai->ai_canonname);
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179 | if(!ca->ai_canonname) {
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180 | error = EAI_MEMORY;
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181 | free(ca->ai_addr);
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182 | free(ca);
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183 | break;
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184 | }
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185 | }
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186 |
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187 | /* if the return list is empty, this becomes the first element */
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188 | if(!cafirst)
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189 | cafirst = ca;
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190 |
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191 | /* add this element last in the return list */
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192 | if(calast)
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193 | calast->ai_next = ca;
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194 | calast = ca;
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195 |
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196 | }
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197 |
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198 | /* destroy the addrinfo list */
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199 | if(aihead)
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200 | freeaddrinfo(aihead);
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201 |
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202 | /* if we failed, also destroy the Curl_addrinfo list */
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203 | if(error) {
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204 | Curl_freeaddrinfo(cafirst);
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205 | cafirst = NULL;
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206 | }
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207 | else if(!cafirst) {
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208 | #ifdef EAI_NONAME
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209 | /* rfc3493 conformant */
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210 | error = EAI_NONAME;
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211 | #else
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212 | /* rfc3493 obsoleted */
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213 | error = EAI_NODATA;
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214 | #endif
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215 | #ifdef USE_WINSOCK
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216 | SET_SOCKERRNO(error);
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217 | #endif
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218 | }
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219 |
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220 | *result = cafirst;
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221 |
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222 | /* This is not a CURLcode */
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223 | return error;
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224 | }
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225 | #endif /* HAVE_GETADDRINFO */
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226 |
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227 |
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228 | /*
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229 | * Curl_he2ai()
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230 | *
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231 | * This function returns a pointer to the first element of a newly allocated
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232 | * Curl_addrinfo struct linked list filled with the data of a given hostent.
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233 | * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
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234 | * stack, but usable also for IPv4, all hosts and environments.
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235 | *
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236 | * The memory allocated by this function *MUST* be free'd later on calling
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237 | * Curl_freeaddrinfo(). For each successful call to this function there
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238 | * must be an associated call later to Curl_freeaddrinfo().
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239 | *
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240 | * Curl_addrinfo defined in "lib/curl_addrinfo.h"
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241 | *
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242 | * struct Curl_addrinfo {
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243 | * int ai_flags;
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244 | * int ai_family;
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245 | * int ai_socktype;
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246 | * int ai_protocol;
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247 | * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
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248 | * char *ai_canonname;
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249 | * struct sockaddr *ai_addr;
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250 | * struct Curl_addrinfo *ai_next;
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251 | * };
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252 | * typedef struct Curl_addrinfo Curl_addrinfo;
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253 | *
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254 | * hostent defined in <netdb.h>
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255 | *
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256 | * struct hostent {
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257 | * char *h_name;
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258 | * char **h_aliases;
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259 | * int h_addrtype;
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260 | * int h_length;
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261 | * char **h_addr_list;
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262 | * };
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263 | *
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264 | * for backward compatibility:
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265 | *
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266 | * #define h_addr h_addr_list[0]
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267 | */
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268 |
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269 | Curl_addrinfo *
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270 | Curl_he2ai(const struct hostent *he, int port)
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271 | {
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272 | Curl_addrinfo *ai;
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273 | Curl_addrinfo *prevai = NULL;
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274 | Curl_addrinfo *firstai = NULL;
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275 | struct sockaddr_in *addr;
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276 | #ifdef ENABLE_IPV6
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277 | struct sockaddr_in6 *addr6;
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278 | #endif
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279 | CURLcode result = CURLE_OK;
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280 | int i;
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281 | char *curr;
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282 |
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283 | if(!he)
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284 | /* no input == no output! */
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285 | return NULL;
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286 |
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287 | DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
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288 |
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289 | for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
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290 |
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291 | size_t ss_size;
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292 | #ifdef ENABLE_IPV6
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293 | if(he->h_addrtype == AF_INET6)
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294 | ss_size = sizeof(struct sockaddr_in6);
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295 | else
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296 | #endif
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297 | ss_size = sizeof(struct sockaddr_in);
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298 |
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299 | ai = calloc(1, sizeof(Curl_addrinfo));
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300 | if(!ai) {
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301 | result = CURLE_OUT_OF_MEMORY;
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302 | break;
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303 | }
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304 | ai->ai_canonname = strdup(he->h_name);
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305 | if(!ai->ai_canonname) {
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306 | result = CURLE_OUT_OF_MEMORY;
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307 | free(ai);
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308 | break;
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309 | }
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310 | ai->ai_addr = calloc(1, ss_size);
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311 | if(!ai->ai_addr) {
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312 | result = CURLE_OUT_OF_MEMORY;
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313 | free(ai->ai_canonname);
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314 | free(ai);
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315 | break;
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316 | }
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317 |
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318 | if(!firstai)
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319 | /* store the pointer we want to return from this function */
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320 | firstai = ai;
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321 |
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322 | if(prevai)
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323 | /* make the previous entry point to this */
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324 | prevai->ai_next = ai;
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325 |
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326 | ai->ai_family = he->h_addrtype;
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327 |
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328 | /* we return all names as STREAM, so when using this address for TFTP
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329 | the type must be ignored and conn->socktype be used instead! */
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330 | ai->ai_socktype = SOCK_STREAM;
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331 |
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332 | ai->ai_addrlen = (curl_socklen_t)ss_size;
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333 |
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334 | /* leave the rest of the struct filled with zero */
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335 |
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336 | switch(ai->ai_family) {
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337 | case AF_INET:
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338 | addr = (void *)ai->ai_addr; /* storage area for this info */
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339 |
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340 | memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
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341 | addr->sin_family = (unsigned short)(he->h_addrtype);
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342 | addr->sin_port = htons((unsigned short)port);
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343 | break;
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344 |
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345 | #ifdef ENABLE_IPV6
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346 | case AF_INET6:
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347 | addr6 = (void *)ai->ai_addr; /* storage area for this info */
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348 |
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349 | memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
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350 | addr6->sin6_family = (unsigned short)(he->h_addrtype);
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351 | addr6->sin6_port = htons((unsigned short)port);
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352 | break;
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353 | #endif
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354 | }
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355 |
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356 | prevai = ai;
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357 | }
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358 |
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359 | if(result) {
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360 | Curl_freeaddrinfo(firstai);
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361 | firstai = NULL;
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362 | }
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363 |
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364 | return firstai;
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365 | }
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366 |
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367 |
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368 | struct namebuff {
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369 | struct hostent hostentry;
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370 | union {
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371 | struct in_addr ina4;
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372 | #ifdef ENABLE_IPV6
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373 | struct in6_addr ina6;
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374 | #endif
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375 | } addrentry;
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376 | char *h_addr_list[2];
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377 | };
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378 |
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379 |
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380 | /*
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381 | * Curl_ip2addr()
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382 | *
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383 | * This function takes an internet address, in binary form, as input parameter
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384 | * along with its address family and the string version of the address, and it
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385 | * returns a Curl_addrinfo chain filled in correctly with information for the
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386 | * given address/host
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387 | */
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388 |
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389 | Curl_addrinfo *
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390 | Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
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391 | {
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392 | Curl_addrinfo *ai;
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393 |
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394 | #if defined(__VMS) && \
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395 | defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
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396 | #pragma pointer_size save
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397 | #pragma pointer_size short
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398 | #pragma message disable PTRMISMATCH
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399 | #endif
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400 |
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401 | struct hostent *h;
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402 | struct namebuff *buf;
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403 | char *addrentry;
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404 | char *hoststr;
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405 | size_t addrsize;
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406 |
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407 | DEBUGASSERT(inaddr && hostname);
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408 |
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409 | buf = malloc(sizeof(struct namebuff));
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410 | if(!buf)
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411 | return NULL;
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412 |
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413 | hoststr = strdup(hostname);
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414 | if(!hoststr) {
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415 | free(buf);
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416 | return NULL;
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417 | }
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418 |
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419 | switch(af) {
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420 | case AF_INET:
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421 | addrsize = sizeof(struct in_addr);
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422 | addrentry = (void *)&buf->addrentry.ina4;
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423 | memcpy(addrentry, inaddr, sizeof(struct in_addr));
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424 | break;
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425 | #ifdef ENABLE_IPV6
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426 | case AF_INET6:
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427 | addrsize = sizeof(struct in6_addr);
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428 | addrentry = (void *)&buf->addrentry.ina6;
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429 | memcpy(addrentry, inaddr, sizeof(struct in6_addr));
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430 | break;
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431 | #endif
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432 | default:
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433 | free(hoststr);
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434 | free(buf);
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435 | return NULL;
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436 | }
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437 |
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438 | h = &buf->hostentry;
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439 | h->h_name = hoststr;
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440 | h->h_aliases = NULL;
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441 | h->h_addrtype = (short)af;
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442 | h->h_length = (short)addrsize;
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443 | h->h_addr_list = &buf->h_addr_list[0];
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444 | h->h_addr_list[0] = addrentry;
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445 | h->h_addr_list[1] = NULL; /* terminate list of entries */
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446 |
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447 | #if defined(__VMS) && \
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448 | defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
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449 | #pragma pointer_size restore
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450 | #pragma message enable PTRMISMATCH
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451 | #endif
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452 |
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453 | ai = Curl_he2ai(h, port);
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454 |
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455 | free(hoststr);
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456 | free(buf);
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457 |
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458 | return ai;
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459 | }
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460 |
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461 | /*
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462 | * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
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463 | * allocated Curl_addrinfo struct and returns it.
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464 | */
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465 | Curl_addrinfo *Curl_str2addr(char *address, int port)
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466 | {
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467 | struct in_addr in;
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468 | if(Curl_inet_pton(AF_INET, address, &in) > 0)
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469 | /* This is a dotted IP address 123.123.123.123-style */
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470 | return Curl_ip2addr(AF_INET, &in, address, port);
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471 | #ifdef ENABLE_IPV6
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472 | {
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473 | struct in6_addr in6;
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474 | if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
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475 | /* This is a dotted IPv6 address ::1-style */
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476 | return Curl_ip2addr(AF_INET6, &in6, address, port);
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477 | }
|
---|
478 | #endif
|
---|
479 | return NULL; /* bad input format */
|
---|
480 | }
|
---|
481 |
|
---|
482 | #ifdef USE_UNIX_SOCKETS
|
---|
483 | /**
|
---|
484 | * Given a path to a Unix domain socket, return a newly allocated Curl_addrinfo
|
---|
485 | * struct initialized with this path.
|
---|
486 | * Set '*longpath' to TRUE if the error is a too long path.
|
---|
487 | */
|
---|
488 | Curl_addrinfo *Curl_unix2addr(const char *path, bool *longpath, bool abstract)
|
---|
489 | {
|
---|
490 | Curl_addrinfo *ai;
|
---|
491 | struct sockaddr_un *sa_un;
|
---|
492 | size_t path_len;
|
---|
493 |
|
---|
494 | *longpath = FALSE;
|
---|
495 |
|
---|
496 | ai = calloc(1, sizeof(Curl_addrinfo));
|
---|
497 | if(!ai)
|
---|
498 | return NULL;
|
---|
499 | ai->ai_addr = calloc(1, sizeof(struct sockaddr_un));
|
---|
500 | if(!ai->ai_addr) {
|
---|
501 | free(ai);
|
---|
502 | return NULL;
|
---|
503 | }
|
---|
504 |
|
---|
505 | sa_un = (void *) ai->ai_addr;
|
---|
506 | sa_un->sun_family = AF_UNIX;
|
---|
507 |
|
---|
508 | /* sun_path must be able to store the NUL-terminated path */
|
---|
509 | path_len = strlen(path) + 1;
|
---|
510 | if(path_len > sizeof(sa_un->sun_path)) {
|
---|
511 | free(ai->ai_addr);
|
---|
512 | free(ai);
|
---|
513 | *longpath = TRUE;
|
---|
514 | return NULL;
|
---|
515 | }
|
---|
516 |
|
---|
517 | ai->ai_family = AF_UNIX;
|
---|
518 | ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
|
---|
519 | ai->ai_addrlen = (curl_socklen_t)
|
---|
520 | ((offsetof(struct sockaddr_un, sun_path) + path_len) & 0x7FFFFFFF);
|
---|
521 |
|
---|
522 | /* Abstract Unix domain socket have NULL prefix instead of suffix */
|
---|
523 | if(abstract)
|
---|
524 | memcpy(sa_un->sun_path + 1, path, path_len - 1);
|
---|
525 | else
|
---|
526 | memcpy(sa_un->sun_path, path, path_len); /* copy NUL byte */
|
---|
527 |
|
---|
528 | return ai;
|
---|
529 | }
|
---|
530 | #endif
|
---|
531 |
|
---|
532 | #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
|
---|
533 | /*
|
---|
534 | * curl_dofreeaddrinfo()
|
---|
535 | *
|
---|
536 | * This is strictly for memory tracing and are using the same style as the
|
---|
537 | * family otherwise present in memdebug.c. I put these ones here since they
|
---|
538 | * require a bunch of structs I didn't want to include in memdebug.c
|
---|
539 | */
|
---|
540 |
|
---|
541 | void
|
---|
542 | curl_dofreeaddrinfo(struct addrinfo *freethis,
|
---|
543 | int line, const char *source)
|
---|
544 | {
|
---|
545 | #ifdef USE_LWIPSOCK
|
---|
546 | lwip_freeaddrinfo(freethis);
|
---|
547 | #else
|
---|
548 | (freeaddrinfo)(freethis);
|
---|
549 | #endif
|
---|
550 | curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
|
---|
551 | source, line, (void *)freethis);
|
---|
552 | }
|
---|
553 | #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
|
---|
554 |
|
---|
555 |
|
---|
556 | #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
|
---|
557 | /*
|
---|
558 | * curl_dogetaddrinfo()
|
---|
559 | *
|
---|
560 | * This is strictly for memory tracing and are using the same style as the
|
---|
561 | * family otherwise present in memdebug.c. I put these ones here since they
|
---|
562 | * require a bunch of structs I didn't want to include in memdebug.c
|
---|
563 | */
|
---|
564 |
|
---|
565 | int
|
---|
566 | curl_dogetaddrinfo(const char *hostname,
|
---|
567 | const char *service,
|
---|
568 | const struct addrinfo *hints,
|
---|
569 | struct addrinfo **result,
|
---|
570 | int line, const char *source)
|
---|
571 | {
|
---|
572 | #ifdef USE_LWIPSOCK
|
---|
573 | int res=lwip_getaddrinfo(hostname, service, hints, result);
|
---|
574 | #else
|
---|
575 | int res=(getaddrinfo)(hostname, service, hints, result);
|
---|
576 | #endif
|
---|
577 | if(0 == res)
|
---|
578 | /* success */
|
---|
579 | curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
|
---|
580 | source, line, (void *)*result);
|
---|
581 | else
|
---|
582 | curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
|
---|
583 | source, line);
|
---|
584 | return res;
|
---|
585 | }
|
---|
586 | #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
|
---|
587 |
|
---|
588 | #if defined(HAVE_GETADDRINFO) && defined(USE_RESOLVE_ON_IPS)
|
---|
589 | /*
|
---|
590 | * Work-arounds the sin6_port is always zero bug on iOS 9.3.2 and Mac OS X
|
---|
591 | * 10.11.5.
|
---|
592 | */
|
---|
593 | void Curl_addrinfo_set_port(Curl_addrinfo *addrinfo, int port)
|
---|
594 | {
|
---|
595 | Curl_addrinfo *ca;
|
---|
596 | struct sockaddr_in *addr;
|
---|
597 | #ifdef ENABLE_IPV6
|
---|
598 | struct sockaddr_in6 *addr6;
|
---|
599 | #endif
|
---|
600 | for(ca = addrinfo; ca != NULL; ca = ca->ai_next) {
|
---|
601 | switch(ca->ai_family) {
|
---|
602 | case AF_INET:
|
---|
603 | addr = (void *)ca->ai_addr; /* storage area for this info */
|
---|
604 | addr->sin_port = htons((unsigned short)port);
|
---|
605 | break;
|
---|
606 |
|
---|
607 | #ifdef ENABLE_IPV6
|
---|
608 | case AF_INET6:
|
---|
609 | addr6 = (void *)ca->ai_addr; /* storage area for this info */
|
---|
610 | addr6->sin6_port = htons((unsigned short)port);
|
---|
611 | break;
|
---|
612 | #endif
|
---|
613 | }
|
---|
614 | }
|
---|
615 | }
|
---|
616 | #endif
|
---|