1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
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 https://curl.se/docs/copyright.html.
13 *
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.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25 #include "curl_setup.h"
26
27 /***********************************************************************
28 * Only for builds using asynchronous name resolves
29 **********************************************************************/
30 #ifdef CURLRES_ASYNCH
31
32 #ifdef HAVE_NETINET_IN_H
33 #include <netinet/in.h>
34 #endif
35 #ifdef HAVE_NETDB_H
36 #include <netdb.h>
37 #endif
38 #ifdef HAVE_ARPA_INET_H
39 #include <arpa/inet.h>
40 #endif
41 #ifdef __VMS
42 #include <in.h>
43 #include <inet.h>
44 #endif
45
46 #include "urldata.h"
47 #include "sendf.h"
48 #include "hostip.h"
49 #include "hash.h"
50 #include "share.h"
51 #include "url.h"
52 #include "curl_memory.h"
53 /* The last #include file should be: */
54 #include "memdebug.h"
55
56 /*
57 * Curl_addrinfo_callback() gets called by ares, gethostbyname_thread()
58 * or getaddrinfo_thread() when we got the name resolved (or not!).
59 *
60 * If the status argument is CURL_ASYNC_SUCCESS, this function takes
61 * ownership of the Curl_addrinfo passed, storing the resolved data
62 * in the DNS cache.
63 *
64 * The storage operation locks and unlocks the DNS cache.
65 */
Curl_addrinfo_callback(struct Curl_easy * data,int status,struct Curl_addrinfo * ai)66 CURLcode Curl_addrinfo_callback(struct Curl_easy *data,
67 int status,
68 struct Curl_addrinfo *ai)
69 {
70 struct Curl_dns_entry *dns = NULL;
71 CURLcode result = CURLE_OK;
72
73 data->state.async.status = status;
74
75 if(CURL_ASYNC_SUCCESS == status) {
76 if(ai) {
77 if(data->share)
78 Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
79
80 dns = Curl_cache_addr(data, ai,
81 data->state.async.hostname, 0,
82 data->state.async.port, FALSE);
83 if(data->share)
84 Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
85
86 if(!dns) {
87 /* failed to store, cleanup and return error */
88 Curl_freeaddrinfo(ai);
89 result = CURLE_OUT_OF_MEMORY;
90 }
91 }
92 else {
93 result = CURLE_OUT_OF_MEMORY;
94 }
95 }
96
97 data->state.async.dns = dns;
98
99 /* Set async.done TRUE last in this function since it may be used multi-
100 threaded and once this is TRUE the other thread may read fields from the
101 async struct */
102 data->state.async.done = TRUE;
103
104 /* IPv4: The input hostent struct will be freed by ares when we return from
105 this function */
106 return result;
107 }
108
109 /*
110 * Curl_getaddrinfo() is the generic low-level name resolve API within this
111 * source file. There are several versions of this function - for different
112 * name resolve layers (selected at build-time). They all take this same set
113 * of arguments
114 */
Curl_getaddrinfo(struct Curl_easy * data,const char * hostname,int port,int * waitp)115 struct Curl_addrinfo *Curl_getaddrinfo(struct Curl_easy *data,
116 const char *hostname,
117 int port,
118 int *waitp)
119 {
120 return Curl_resolver_getaddrinfo(data, hostname, port, waitp);
121 }
122
123 #endif /* CURLRES_ASYNCH */
124
