| 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 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | /***********************************************************************
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| 26 | * Only for builds using asynchronous name resolves
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| 27 | **********************************************************************/
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| 28 | #ifdef CURLRES_ASYNCH
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| 29 |
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| 30 | #ifdef HAVE_NETINET_IN_H
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| 31 | #include <netinet/in.h>
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| 32 | #endif
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| 33 | #ifdef HAVE_NETDB_H
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| 34 | #include <netdb.h>
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| 35 | #endif
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| 36 | #ifdef HAVE_ARPA_INET_H
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| 37 | #include <arpa/inet.h>
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| 38 | #endif
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| 39 | #ifdef __VMS
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| 40 | #include <in.h>
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| 41 | #include <inet.h>
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| 42 | #endif
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| 43 |
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| 44 | #ifdef HAVE_PROCESS_H
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| 45 | #include <process.h>
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| 46 | #endif
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| 47 |
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| 48 | #include "urldata.h"
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| 49 | #include "sendf.h"
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| 50 | #include "hostip.h"
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| 51 | #include "hash.h"
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| 52 | #include "share.h"
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| 53 | #include "strerror.h"
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| 54 | #include "url.h"
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| 55 | #include "curl_memory.h"
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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_addrinfo_callback() gets called by ares, gethostbyname_thread()
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| 61 | * or getaddrinfo_thread() when we got the name resolved (or not!).
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| 62 | *
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| 63 | * If the status argument is CURL_ASYNC_SUCCESS, this function takes
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| 64 | * ownership of the Curl_addrinfo passed, storing the resolved data
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| 65 | * in the DNS cache.
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| 66 | *
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| 67 | * The storage operation locks and unlocks the DNS cache.
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| 68 | */
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| 69 | CURLcode Curl_addrinfo_callback(struct connectdata *conn,
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| 70 | int status,
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| 71 | struct Curl_addrinfo *ai)
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| 72 | {
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| 73 | struct Curl_dns_entry *dns = NULL;
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| 74 | CURLcode result = CURLE_OK;
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| 75 |
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| 76 | conn->async.status = status;
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| 77 |
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| 78 | if(CURL_ASYNC_SUCCESS == status) {
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| 79 | if(ai) {
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| 80 | struct Curl_easy *data = conn->data;
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| 81 |
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| 82 | if(data->share)
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| 83 | Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
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| 84 |
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| 85 | dns = Curl_cache_addr(data, ai,
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| 86 | conn->async.hostname,
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| 87 | conn->async.port);
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| 88 | if(!dns) {
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| 89 | /* failed to store, cleanup and return error */
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| 90 | Curl_freeaddrinfo(ai);
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| 91 | result = CURLE_OUT_OF_MEMORY;
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| 92 | }
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| 93 |
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| 94 | if(data->share)
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| 95 | Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
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| 96 | }
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| 97 | else {
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| 98 | result = CURLE_OUT_OF_MEMORY;
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| 99 | }
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| 100 | }
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| 101 |
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| 102 | conn->async.dns = dns;
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| 103 |
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| 104 | /* Set async.done TRUE last in this function since it may be used multi-
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| 105 | threaded and once this is TRUE the other thread may read fields from the
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| 106 | async struct */
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| 107 | conn->async.done = TRUE;
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| 108 |
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| 109 | /* IPv4: The input hostent struct will be freed by ares when we return from
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| 110 | this function */
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| 111 | return result;
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| 112 | }
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| 113 |
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| 114 | /*
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| 115 | * Curl_getaddrinfo() is the generic low-level name resolve API within this
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| 116 | * source file. There are several versions of this function - for different
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| 117 | * name resolve layers (selected at build-time). They all take this same set
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| 118 | * of arguments
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| 119 | */
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| 120 | Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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| 121 | const char *hostname,
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| 122 | int port,
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| 123 | int *waitp)
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| 124 | {
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| 125 | return Curl_resolver_getaddrinfo(conn, hostname, port, waitp);
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| 126 | }
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| 127 |
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| 128 | #endif /* CURLRES_ASYNCH */
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