1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 1998 - 2022, Daniel Stenberg, <[email protected]>, 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 | #ifdef HAVE_PROCESS_H |
47 | #include <process.h> |
48 | #endif |
49 | |
50 | #include "urldata.h" |
51 | #include "sendf.h" |
52 | #include "hostip.h" |
53 | #include "hash.h" |
54 | #include "share.h" |
55 | #include "url.h" |
56 | #include "curl_memory.h" |
57 | /* The last #include file should be: */ |
58 | #include "memdebug.h" |
59 | |
60 | /* |
61 | * Curl_addrinfo_callback() gets called by ares, gethostbyname_thread() |
62 | * or getaddrinfo_thread() when we got the name resolved (or not!). |
63 | * |
64 | * If the status argument is CURL_ASYNC_SUCCESS, this function takes |
65 | * ownership of the Curl_addrinfo passed, storing the resolved data |
66 | * in the DNS cache. |
67 | * |
68 | * The storage operation locks and unlocks the DNS cache. |
69 | */ |
70 | CURLcode Curl_addrinfo_callback(struct Curl_easy *data, |
71 | int status, |
72 | struct Curl_addrinfo *ai) |
73 | { |
74 | struct Curl_dns_entry *dns = NULL; |
75 | CURLcode result = CURLE_OK; |
76 | |
77 | data->state.async.status = status; |
78 | |
79 | if(CURL_ASYNC_SUCCESS == status) { |
80 | if(ai) { |
81 | if(data->share) |
82 | Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); |
83 | |
84 | dns = Curl_cache_addr(data, ai, |
85 | data->state.async.hostname, |
86 | data->state.async.port); |
87 | if(data->share) |
88 | Curl_share_unlock(data, CURL_LOCK_DATA_DNS); |
89 | |
90 | if(!dns) { |
91 | /* failed to store, cleanup and return error */ |
92 | Curl_freeaddrinfo(ai); |
93 | result = CURLE_OUT_OF_MEMORY; |
94 | } |
95 | } |
96 | else { |
97 | result = CURLE_OUT_OF_MEMORY; |
98 | } |
99 | } |
100 | |
101 | data->state.async.dns = dns; |
102 | |
103 | /* Set async.done TRUE last in this function since it may be used multi- |
104 | threaded and once this is TRUE the other thread may read fields from the |
105 | async struct */ |
106 | data->state.async.done = TRUE; |
107 | |
108 | /* IPv4: The input hostent struct will be freed by ares when we return from |
109 | this function */ |
110 | return result; |
111 | } |
112 | |
113 | /* |
114 | * Curl_getaddrinfo() is the generic low-level name resolve API within this |
115 | * source file. There are several versions of this function - for different |
116 | * name resolve layers (selected at build-time). They all take this same set |
117 | * of arguments |
118 | */ |
119 | struct Curl_addrinfo *Curl_getaddrinfo(struct Curl_easy *data, |
120 | const char *hostname, |
121 | int port, |
122 | int *waitp) |
123 | { |
124 | return Curl_resolver_getaddrinfo(data, hostname, port, waitp); |
125 | } |
126 | |
127 | #endif /* CURLRES_ASYNCH */ |
128 | |