[164] | 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 - 2014, 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 "curl_addrinfo.h"
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| 51 | #include "inet_pton.h"
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| 52 | #include "warnless.h"
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| 53 | #include "curl_printf.h"
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| 54 | #include "curl_memory.h"
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| 55 |
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| 56 | /* The last #include file should be: */
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| 57 | #include "memdebug.h"
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| 58 |
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| 59 | /*
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| 60 | * Curl_freeaddrinfo()
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| 61 | *
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| 62 | * This is used to free a linked list of Curl_addrinfo structs along
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| 63 | * with all its associated allocated storage. This function should be
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| 64 | * called once for each successful call to Curl_getaddrinfo_ex() or to
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| 65 | * any function call which actually allocates a Curl_addrinfo struct.
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| 66 | */
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| 67 |
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| 68 | #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER == 910) && \
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| 69 | defined(__OPTIMIZE__) && defined(__unix__) && defined(__i386__)
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| 70 | /* workaround icc 9.1 optimizer issue */
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| 71 | # define vqualifier volatile
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| 72 | #else
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| 73 | # define vqualifier
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| 74 | #endif
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| 75 |
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| 76 | void
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| 77 | Curl_freeaddrinfo(Curl_addrinfo *cahead)
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| 78 | {
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| 79 | Curl_addrinfo *vqualifier canext;
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| 80 | Curl_addrinfo *ca;
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| 81 |
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| 82 | for(ca = cahead; ca != NULL; ca = canext) {
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| 83 | free(ca->ai_addr);
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| 84 | free(ca->ai_canonname);
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| 85 | canext = ca->ai_next;
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| 86 |
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| 87 | free(ca);
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| 88 | }
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| 89 | }
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| 90 |
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| 91 |
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| 92 | #ifdef HAVE_GETADDRINFO
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| 93 | /*
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| 94 | * Curl_getaddrinfo_ex()
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| 95 | *
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| 96 | * This is a wrapper function around system's getaddrinfo(), with
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| 97 | * the only difference that instead of returning a linked list of
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| 98 | * addrinfo structs this one returns a linked list of Curl_addrinfo
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| 99 | * ones. The memory allocated by this function *MUST* be free'd with
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| 100 | * Curl_freeaddrinfo(). For each successful call to this function
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| 101 | * there must be an associated call later to Curl_freeaddrinfo().
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| 102 | *
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| 103 | * There should be no single call to system's getaddrinfo() in the
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| 104 | * whole library, any such call should be 'routed' through this one.
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| 105 | */
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| 106 |
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| 107 | int
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| 108 | Curl_getaddrinfo_ex(const char *nodename,
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| 109 | const char *servname,
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| 110 | const struct addrinfo *hints,
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| 111 | Curl_addrinfo **result)
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| 112 | {
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| 113 | const struct addrinfo *ai;
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| 114 | struct addrinfo *aihead;
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| 115 | Curl_addrinfo *cafirst = NULL;
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| 116 | Curl_addrinfo *calast = NULL;
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| 117 | Curl_addrinfo *ca;
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| 118 | size_t ss_size;
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| 119 | int error;
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| 120 |
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| 121 | *result = NULL; /* assume failure */
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| 122 |
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| 123 | error = getaddrinfo(nodename, servname, hints, &aihead);
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| 124 | if(error)
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| 125 | return error;
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| 126 |
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| 127 | /* traverse the addrinfo list */
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| 128 |
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| 129 | for(ai = aihead; ai != NULL; ai = ai->ai_next) {
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| 130 |
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| 131 | /* ignore elements with unsupported address family, */
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| 132 | /* settle family-specific sockaddr structure size. */
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| 133 | if(ai->ai_family == AF_INET)
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| 134 | ss_size = sizeof(struct sockaddr_in);
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| 135 | #ifdef ENABLE_IPV6
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| 136 | else if(ai->ai_family == AF_INET6)
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| 137 | ss_size = sizeof(struct sockaddr_in6);
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| 138 | #endif
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| 139 | else
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| 140 | continue;
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| 141 |
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| 142 | /* ignore elements without required address info */
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| 143 | if((ai->ai_addr == NULL) || !(ai->ai_addrlen > 0))
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| 144 | continue;
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| 145 |
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| 146 | /* ignore elements with bogus address size */
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| 147 | if((size_t)ai->ai_addrlen < ss_size)
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| 148 | continue;
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| 149 |
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| 150 | if((ca = malloc(sizeof(Curl_addrinfo))) == NULL) {
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| 151 | error = EAI_MEMORY;
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| 152 | break;
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| 153 | }
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| 154 |
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| 155 | /* copy each structure member individually, member ordering, */
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| 156 | /* size, or padding might be different for each platform. */
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| 157 |
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| 158 | ca->ai_flags = ai->ai_flags;
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| 159 | ca->ai_family = ai->ai_family;
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| 160 | ca->ai_socktype = ai->ai_socktype;
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| 161 | ca->ai_protocol = ai->ai_protocol;
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| 162 | ca->ai_addrlen = (curl_socklen_t)ss_size;
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| 163 | ca->ai_addr = NULL;
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| 164 | ca->ai_canonname = NULL;
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| 165 | ca->ai_next = NULL;
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| 166 |
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| 167 | if((ca->ai_addr = malloc(ss_size)) == NULL) {
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| 168 | error = EAI_MEMORY;
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| 169 | free(ca);
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| 170 | break;
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| 171 | }
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| 172 | memcpy(ca->ai_addr, ai->ai_addr, ss_size);
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| 173 |
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| 174 | if(ai->ai_canonname != NULL) {
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| 175 | if((ca->ai_canonname = strdup(ai->ai_canonname)) == NULL) {
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| 176 | error = EAI_MEMORY;
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| 177 | free(ca->ai_addr);
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| 178 | free(ca);
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| 179 | break;
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| 180 | }
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| 181 | }
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| 182 |
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| 183 | /* if the return list is empty, this becomes the first element */
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| 184 | if(!cafirst)
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| 185 | cafirst = ca;
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| 186 |
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| 187 | /* add this element last in the return list */
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| 188 | if(calast)
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| 189 | calast->ai_next = ca;
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| 190 | calast = ca;
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| 191 |
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| 192 | }
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| 193 |
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| 194 | /* destroy the addrinfo list */
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| 195 | if(aihead)
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| 196 | freeaddrinfo(aihead);
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| 197 |
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| 198 | /* if we failed, also destroy the Curl_addrinfo list */
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| 199 | if(error) {
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| 200 | Curl_freeaddrinfo(cafirst);
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| 201 | cafirst = NULL;
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| 202 | }
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| 203 | else if(!cafirst) {
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| 204 | #ifdef EAI_NONAME
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| 205 | /* rfc3493 conformant */
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| 206 | error = EAI_NONAME;
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| 207 | #else
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| 208 | /* rfc3493 obsoleted */
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| 209 | error = EAI_NODATA;
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| 210 | #endif
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| 211 | #ifdef USE_WINSOCK
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| 212 | SET_SOCKERRNO(error);
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| 213 | #endif
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| 214 | }
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| 215 |
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| 216 | *result = cafirst;
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| 217 |
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| 218 | /* This is not a CURLcode */
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| 219 | return error;
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| 220 | }
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| 221 | #endif /* HAVE_GETADDRINFO */
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| 222 |
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| 223 |
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| 224 | /*
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| 225 | * Curl_he2ai()
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| 226 | *
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| 227 | * This function returns a pointer to the first element of a newly allocated
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| 228 | * Curl_addrinfo struct linked list filled with the data of a given hostent.
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| 229 | * Curl_addrinfo is meant to work like the addrinfo struct does for a IPv6
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| 230 | * stack, but usable also for IPv4, all hosts and environments.
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| 231 | *
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| 232 | * The memory allocated by this function *MUST* be free'd later on calling
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| 233 | * Curl_freeaddrinfo(). For each successful call to this function there
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| 234 | * must be an associated call later to Curl_freeaddrinfo().
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| 235 | *
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| 236 | * Curl_addrinfo defined in "lib/curl_addrinfo.h"
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| 237 | *
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| 238 | * struct Curl_addrinfo {
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| 239 | * int ai_flags;
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| 240 | * int ai_family;
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| 241 | * int ai_socktype;
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| 242 | * int ai_protocol;
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| 243 | * curl_socklen_t ai_addrlen; * Follow rfc3493 struct addrinfo *
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| 244 | * char *ai_canonname;
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| 245 | * struct sockaddr *ai_addr;
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| 246 | * struct Curl_addrinfo *ai_next;
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| 247 | * };
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| 248 | * typedef struct Curl_addrinfo Curl_addrinfo;
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| 249 | *
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| 250 | * hostent defined in <netdb.h>
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| 251 | *
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| 252 | * struct hostent {
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| 253 | * char *h_name;
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| 254 | * char **h_aliases;
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| 255 | * int h_addrtype;
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| 256 | * int h_length;
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| 257 | * char **h_addr_list;
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| 258 | * };
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| 259 | *
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| 260 | * for backward compatibility:
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| 261 | *
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| 262 | * #define h_addr h_addr_list[0]
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| 263 | */
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| 264 |
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| 265 | Curl_addrinfo *
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| 266 | Curl_he2ai(const struct hostent *he, int port)
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| 267 | {
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| 268 | Curl_addrinfo *ai;
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| 269 | Curl_addrinfo *prevai = NULL;
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| 270 | Curl_addrinfo *firstai = NULL;
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| 271 | struct sockaddr_in *addr;
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| 272 | #ifdef ENABLE_IPV6
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| 273 | struct sockaddr_in6 *addr6;
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| 274 | #endif
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| 275 | CURLcode result = CURLE_OK;
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| 276 | int i;
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| 277 | char *curr;
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| 278 |
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| 279 | if(!he)
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| 280 | /* no input == no output! */
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| 281 | return NULL;
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| 282 |
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| 283 | DEBUGASSERT((he->h_name != NULL) && (he->h_addr_list != NULL));
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| 284 |
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| 285 | for(i=0; (curr = he->h_addr_list[i]) != NULL; i++) {
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| 286 |
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| 287 | size_t ss_size;
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| 288 | #ifdef ENABLE_IPV6
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| 289 | if(he->h_addrtype == AF_INET6)
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| 290 | ss_size = sizeof (struct sockaddr_in6);
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| 291 | else
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| 292 | #endif
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| 293 | ss_size = sizeof (struct sockaddr_in);
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| 294 |
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| 295 | if((ai = calloc(1, sizeof(Curl_addrinfo))) == NULL) {
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| 296 | result = CURLE_OUT_OF_MEMORY;
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| 297 | break;
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| 298 | }
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| 299 | if((ai->ai_canonname = strdup(he->h_name)) == NULL) {
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| 300 | result = CURLE_OUT_OF_MEMORY;
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| 301 | free(ai);
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| 302 | break;
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| 303 | }
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| 304 | if((ai->ai_addr = calloc(1, ss_size)) == NULL) {
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| 305 | result = CURLE_OUT_OF_MEMORY;
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| 306 | free(ai->ai_canonname);
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| 307 | free(ai);
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| 308 | break;
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| 309 | }
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| 310 |
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| 311 | if(!firstai)
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| 312 | /* store the pointer we want to return from this function */
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| 313 | firstai = ai;
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| 314 |
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| 315 | if(prevai)
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| 316 | /* make the previous entry point to this */
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| 317 | prevai->ai_next = ai;
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| 318 |
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| 319 | ai->ai_family = he->h_addrtype;
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| 320 |
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| 321 | /* we return all names as STREAM, so when using this address for TFTP
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| 322 | the type must be ignored and conn->socktype be used instead! */
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| 323 | ai->ai_socktype = SOCK_STREAM;
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| 324 |
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| 325 | ai->ai_addrlen = (curl_socklen_t)ss_size;
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| 326 |
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| 327 | /* leave the rest of the struct filled with zero */
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| 328 |
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| 329 | switch (ai->ai_family) {
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| 330 | case AF_INET:
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| 331 | addr = (void *)ai->ai_addr; /* storage area for this info */
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| 332 |
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| 333 | memcpy(&addr->sin_addr, curr, sizeof(struct in_addr));
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| 334 | addr->sin_family = (unsigned short)(he->h_addrtype);
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| 335 | addr->sin_port = htons((unsigned short)port);
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| 336 | break;
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| 337 |
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| 338 | #ifdef ENABLE_IPV6
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| 339 | case AF_INET6:
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| 340 | addr6 = (void *)ai->ai_addr; /* storage area for this info */
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| 341 |
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| 342 | memcpy(&addr6->sin6_addr, curr, sizeof(struct in6_addr));
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| 343 | addr6->sin6_family = (unsigned short)(he->h_addrtype);
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| 344 | addr6->sin6_port = htons((unsigned short)port);
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| 345 | break;
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| 346 | #endif
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| 347 | }
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| 348 |
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| 349 | prevai = ai;
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| 350 | }
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| 351 |
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| 352 | if(result) {
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| 353 | Curl_freeaddrinfo(firstai);
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| 354 | firstai = NULL;
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| 355 | }
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| 356 |
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| 357 | return firstai;
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| 358 | }
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| 359 |
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| 360 |
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| 361 | struct namebuff {
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| 362 | struct hostent hostentry;
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| 363 | union {
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| 364 | struct in_addr ina4;
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| 365 | #ifdef ENABLE_IPV6
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| 366 | struct in6_addr ina6;
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| 367 | #endif
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| 368 | } addrentry;
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| 369 | char *h_addr_list[2];
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| 370 | };
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| 371 |
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| 372 |
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| 373 | /*
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| 374 | * Curl_ip2addr()
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| 375 | *
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| 376 | * This function takes an internet address, in binary form, as input parameter
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| 377 | * along with its address family and the string version of the address, and it
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| 378 | * returns a Curl_addrinfo chain filled in correctly with information for the
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| 379 | * given address/host
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| 380 | */
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| 381 |
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| 382 | Curl_addrinfo *
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| 383 | Curl_ip2addr(int af, const void *inaddr, const char *hostname, int port)
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| 384 | {
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| 385 | Curl_addrinfo *ai;
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| 386 |
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| 387 | #if defined(__VMS) && \
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| 388 | defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
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| 389 | #pragma pointer_size save
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| 390 | #pragma pointer_size short
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| 391 | #pragma message disable PTRMISMATCH
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| 392 | #endif
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| 393 |
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| 394 | struct hostent *h;
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| 395 | struct namebuff *buf;
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| 396 | char *addrentry;
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| 397 | char *hoststr;
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| 398 | size_t addrsize;
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| 399 |
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| 400 | DEBUGASSERT(inaddr && hostname);
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| 401 |
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| 402 | buf = malloc(sizeof(struct namebuff));
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| 403 | if(!buf)
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| 404 | return NULL;
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| 405 |
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| 406 | hoststr = strdup(hostname);
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| 407 | if(!hoststr) {
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| 408 | free(buf);
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| 409 | return NULL;
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| 410 | }
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| 411 |
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| 412 | switch(af) {
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| 413 | case AF_INET:
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| 414 | addrsize = sizeof(struct in_addr);
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| 415 | addrentry = (void *)&buf->addrentry.ina4;
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| 416 | memcpy(addrentry, inaddr, sizeof(struct in_addr));
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| 417 | break;
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| 418 | #ifdef ENABLE_IPV6
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| 419 | case AF_INET6:
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| 420 | addrsize = sizeof(struct in6_addr);
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| 421 | addrentry = (void *)&buf->addrentry.ina6;
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| 422 | memcpy(addrentry, inaddr, sizeof(struct in6_addr));
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| 423 | break;
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| 424 | #endif
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| 425 | default:
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| 426 | free(hoststr);
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| 427 | free(buf);
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| 428 | return NULL;
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| 429 | }
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| 430 |
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| 431 | h = &buf->hostentry;
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| 432 | h->h_name = hoststr;
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| 433 | h->h_aliases = NULL;
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| 434 | h->h_addrtype = (short)af;
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| 435 | h->h_length = (short)addrsize;
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| 436 | h->h_addr_list = &buf->h_addr_list[0];
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| 437 | h->h_addr_list[0] = addrentry;
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| 438 | h->h_addr_list[1] = NULL; /* terminate list of entries */
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| 439 |
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| 440 | #if defined(__VMS) && \
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| 441 | defined(__INITIAL_POINTER_SIZE) && (__INITIAL_POINTER_SIZE == 64)
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| 442 | #pragma pointer_size restore
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| 443 | #pragma message enable PTRMISMATCH
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| 444 | #endif
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| 445 |
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| 446 | ai = Curl_he2ai(h, port);
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| 447 |
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| 448 | free(hoststr);
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| 449 | free(buf);
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| 450 |
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| 451 | return ai;
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| 452 | }
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| 453 |
|
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| 454 | /*
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| 455 | * Given an IPv4 or IPv6 dotted string address, this converts it to a proper
|
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| 456 | * allocated Curl_addrinfo struct and returns it.
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| 457 | */
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| 458 | Curl_addrinfo *Curl_str2addr(char *address, int port)
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| 459 | {
|
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| 460 | struct in_addr in;
|
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| 461 | if(Curl_inet_pton(AF_INET, address, &in) > 0)
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| 462 | /* This is a dotted IP address 123.123.123.123-style */
|
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| 463 | return Curl_ip2addr(AF_INET, &in, address, port);
|
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| 464 | #ifdef ENABLE_IPV6
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| 465 | else {
|
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| 466 | struct in6_addr in6;
|
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| 467 | if(Curl_inet_pton(AF_INET6, address, &in6) > 0)
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| 468 | /* This is a dotted IPv6 address ::1-style */
|
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| 469 | return Curl_ip2addr(AF_INET6, &in6, address, port);
|
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| 470 | }
|
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| 471 | #endif
|
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| 472 | return NULL; /* bad input format */
|
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| 473 | }
|
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| 474 |
|
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| 475 | #ifdef USE_UNIX_SOCKETS
|
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| 476 | /**
|
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| 477 | * Given a path to a Unix domain socket, return a newly allocated Curl_addrinfo
|
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| 478 | * struct initialized with this path.
|
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| 479 | */
|
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| 480 | Curl_addrinfo *Curl_unix2addr(const char *path)
|
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| 481 | {
|
---|
| 482 | Curl_addrinfo *ai;
|
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| 483 | struct sockaddr_un *sa_un;
|
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| 484 | size_t path_len;
|
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| 485 |
|
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| 486 | ai = calloc(1, sizeof(Curl_addrinfo));
|
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| 487 | if(!ai)
|
---|
| 488 | return NULL;
|
---|
| 489 | if((ai->ai_addr = calloc(1, sizeof(struct sockaddr_un))) == NULL) {
|
---|
| 490 | free(ai);
|
---|
| 491 | return NULL;
|
---|
| 492 | }
|
---|
| 493 | /* sun_path must be able to store the NUL-terminated path */
|
---|
| 494 | path_len = strlen(path);
|
---|
| 495 | if(path_len >= sizeof(sa_un->sun_path)) {
|
---|
| 496 | free(ai->ai_addr);
|
---|
| 497 | free(ai);
|
---|
| 498 | return NULL;
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | ai->ai_family = AF_UNIX;
|
---|
| 502 | ai->ai_socktype = SOCK_STREAM; /* assume reliable transport for HTTP */
|
---|
| 503 | ai->ai_addrlen = (curl_socklen_t) sizeof(struct sockaddr_un);
|
---|
| 504 | sa_un = (void *) ai->ai_addr;
|
---|
| 505 | sa_un->sun_family = AF_UNIX;
|
---|
| 506 | memcpy(sa_un->sun_path, path, path_len + 1); /* copy NUL byte */
|
---|
| 507 | return ai;
|
---|
| 508 | }
|
---|
| 509 | #endif
|
---|
| 510 |
|
---|
| 511 | #if defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO)
|
---|
| 512 | /*
|
---|
| 513 | * curl_dofreeaddrinfo()
|
---|
| 514 | *
|
---|
| 515 | * This is strictly for memory tracing and are using the same style as the
|
---|
| 516 | * family otherwise present in memdebug.c. I put these ones here since they
|
---|
| 517 | * require a bunch of structs I didn't want to include in memdebug.c
|
---|
| 518 | */
|
---|
| 519 |
|
---|
| 520 | void
|
---|
| 521 | curl_dofreeaddrinfo(struct addrinfo *freethis,
|
---|
| 522 | int line, const char *source)
|
---|
| 523 | {
|
---|
| 524 | #ifdef USE_LWIPSOCK
|
---|
| 525 | lwip_freeaddrinfo(freethis);
|
---|
| 526 | #else
|
---|
| 527 | (freeaddrinfo)(freethis);
|
---|
| 528 | #endif
|
---|
| 529 | curl_memlog("ADDR %s:%d freeaddrinfo(%p)\n",
|
---|
| 530 | source, line, (void *)freethis);
|
---|
| 531 | }
|
---|
| 532 | #endif /* defined(CURLDEBUG) && defined(HAVE_FREEADDRINFO) */
|
---|
| 533 |
|
---|
| 534 |
|
---|
| 535 | #if defined(CURLDEBUG) && defined(HAVE_GETADDRINFO)
|
---|
| 536 | /*
|
---|
| 537 | * curl_dogetaddrinfo()
|
---|
| 538 | *
|
---|
| 539 | * This is strictly for memory tracing and are using the same style as the
|
---|
| 540 | * family otherwise present in memdebug.c. I put these ones here since they
|
---|
| 541 | * require a bunch of structs I didn't want to include in memdebug.c
|
---|
| 542 | */
|
---|
| 543 |
|
---|
| 544 | int
|
---|
| 545 | curl_dogetaddrinfo(const char *hostname,
|
---|
| 546 | const char *service,
|
---|
| 547 | const struct addrinfo *hints,
|
---|
| 548 | struct addrinfo **result,
|
---|
| 549 | int line, const char *source)
|
---|
| 550 | {
|
---|
| 551 | #ifdef USE_LWIPSOCK
|
---|
| 552 | int res=lwip_getaddrinfo(hostname, service, hints, result);
|
---|
| 553 | #else
|
---|
| 554 | int res=(getaddrinfo)(hostname, service, hints, result);
|
---|
| 555 | #endif
|
---|
| 556 | if(0 == res)
|
---|
| 557 | /* success */
|
---|
| 558 | curl_memlog("ADDR %s:%d getaddrinfo() = %p\n",
|
---|
| 559 | source, line, (void *)*result);
|
---|
| 560 | else
|
---|
| 561 | curl_memlog("ADDR %s:%d getaddrinfo() failed\n",
|
---|
| 562 | source, line);
|
---|
| 563 | return res;
|
---|
| 564 | }
|
---|
| 565 | #endif /* defined(CURLDEBUG) && defined(HAVE_GETADDRINFO) */
|
---|
| 566 |
|
---|