1 /***************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
8 * Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
21 ***************************************************************************/
23 #include "curl_setup.h"
25 #ifdef HAVE_NETINET_IN_H
26 #include <netinet/in.h>
31 #ifdef HAVE_ARPA_INET_H
32 #include <arpa/inet.h>
43 #include "curl_urldata.h"
44 #include "curl_sendf.h"
45 #include "curl_hostip.h"
46 #include "curl_hash.h"
47 #include "curl_share.h"
48 #include "curl_strerror.h"
51 #define _MPRINTF_REPLACE /* use our functions only */
52 #include <curl/mprintf.h>
54 #include "curl_memory.h"
55 /* The last #include file should be: */
56 #include "curl_memdebug.h"
58 /***********************************************************************
59 * Only for builds using asynchronous name resolves
60 **********************************************************************/
64 * Curl_addrinfo_callback() gets called by ares, gethostbyname_thread()
65 * or getaddrinfo_thread() when we got the name resolved (or not!).
67 * If the status argument is CURL_ASYNC_SUCCESS, this function takes
68 * ownership of the Curl_addrinfo passed, storing the resolved data
71 * The storage operation locks and unlocks the DNS cache.
73 CURLcode Curl_addrinfo_callback(struct connectdata *conn,
75 struct Curl_addrinfo *ai)
77 struct Curl_dns_entry *dns = NULL;
78 CURLcode rc = CURLE_OK;
80 conn->async.status = status;
82 if(CURL_ASYNC_SUCCESS == status) {
84 struct SessionHandle *data = conn->data;
87 Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
89 dns = Curl_cache_addr(data, ai,
93 /* failed to store, cleanup and return error */
94 Curl_freeaddrinfo(ai);
95 rc = CURLE_OUT_OF_MEMORY;
99 Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
102 rc = CURLE_OUT_OF_MEMORY;
106 conn->async.dns = dns;
108 /* Set async.done TRUE last in this function since it may be used multi-
109 threaded and once this is TRUE the other thread may read fields from the
111 conn->async.done = TRUE;
113 /* ipv4: The input hostent struct will be freed by ares when we return from
118 /* Call this function after Curl_connect() has returned async=TRUE and
119 then a successful name resolve has been received.
121 Note: this function disconnects and frees the conn data in case of
123 CURLcode Curl_async_resolved(struct connectdata *conn,
128 if(conn->async.dns) {
129 conn->dns_entry = conn->async.dns;
130 conn->async.dns = NULL;
133 code = Curl_setup_conn(conn, protocol_done);
136 /* We're not allowed to return failure with memory left allocated
137 in the connectdata struct, free those here */
138 Curl_disconnect(conn, FALSE); /* close the connection */
144 * Curl_getaddrinfo() is the generic low-level name resolve API within this
145 * source file. There are several versions of this function - for different
146 * name resolve layers (selected at build-time). They all take this same set
149 Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
150 const char *hostname,
154 return Curl_resolver_getaddrinfo(conn, hostname, port, waitp);
157 #endif /* CURLRES_ASYNCH */