1 | /*************************************************************************** |
2 | * _ _ ____ _ |
3 | * Project ___| | | | _ \| | |
4 | * / __| | | | |_) | | |
5 | * | (__| |_| | _ <| |___ |
6 | * \___|\___/|_| \_\_____| |
7 | * |
8 | * Copyright (C) 1998 - 2019, 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.haxx.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 | ***************************************************************************/ |
22 | |
23 | #include "curl_setup.h" |
24 | |
25 | /*********************************************************************** |
26 | * Only for builds using asynchronous name resolves |
27 | **********************************************************************/ |
28 | #ifdef CURLRES_ASYNCH |
29 | |
30 | #ifdef HAVE_NETINET_IN_H |
31 | #include <netinet/in.h> |
32 | #endif |
33 | #ifdef HAVE_NETDB_H |
34 | #include <netdb.h> |
35 | #endif |
36 | #ifdef HAVE_ARPA_INET_H |
37 | #include <arpa/inet.h> |
38 | #endif |
39 | #ifdef __VMS |
40 | #include <in.h> |
41 | #include <inet.h> |
42 | #endif |
43 | |
44 | #ifdef HAVE_PROCESS_H |
45 | #include <process.h> |
46 | #endif |
47 | |
48 | #include "urldata.h" |
49 | #include "sendf.h" |
50 | #include "hostip.h" |
51 | #include "hash.h" |
52 | #include "share.h" |
53 | #include "strerror.h" |
54 | #include "url.h" |
55 | #include "curl_memory.h" |
56 | /* The last #include file should be: */ |
57 | #include "memdebug.h" |
58 | |
59 | /* |
60 | * Curl_addrinfo_callback() gets called by ares, gethostbyname_thread() |
61 | * or getaddrinfo_thread() when we got the name resolved (or not!). |
62 | * |
63 | * If the status argument is CURL_ASYNC_SUCCESS, this function takes |
64 | * ownership of the Curl_addrinfo passed, storing the resolved data |
65 | * in the DNS cache. |
66 | * |
67 | * The storage operation locks and unlocks the DNS cache. |
68 | */ |
69 | CURLcode Curl_addrinfo_callback(struct connectdata *conn, |
70 | int status, |
71 | struct Curl_addrinfo *ai) |
72 | { |
73 | struct Curl_dns_entry *dns = NULL; |
74 | CURLcode result = CURLE_OK; |
75 | |
76 | conn->async.status = status; |
77 | |
78 | if(CURL_ASYNC_SUCCESS == status) { |
79 | if(ai) { |
80 | struct Curl_easy *data = conn->data; |
81 | |
82 | if(data->share) |
83 | Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE); |
84 | |
85 | dns = Curl_cache_addr(data, ai, |
86 | conn->async.hostname, |
87 | conn->async.port); |
88 | if(data->share) |
89 | Curl_share_unlock(data, CURL_LOCK_DATA_DNS); |
90 | |
91 | if(!dns) { |
92 | /* failed to store, cleanup and return error */ |
93 | Curl_freeaddrinfo(ai); |
94 | result = CURLE_OUT_OF_MEMORY; |
95 | } |
96 | } |
97 | else { |
98 | result = CURLE_OUT_OF_MEMORY; |
99 | } |
100 | } |
101 | |
102 | conn->async.dns = dns; |
103 | |
104 | /* Set async.done TRUE last in this function since it may be used multi- |
105 | threaded and once this is TRUE the other thread may read fields from the |
106 | async struct */ |
107 | conn->async.done = TRUE; |
108 | |
109 | /* IPv4: The input hostent struct will be freed by ares when we return from |
110 | this function */ |
111 | return result; |
112 | } |
113 | |
114 | /* |
115 | * Curl_getaddrinfo() is the generic low-level name resolve API within this |
116 | * source file. There are several versions of this function - for different |
117 | * name resolve layers (selected at build-time). They all take this same set |
118 | * of arguments |
119 | */ |
120 | Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn, |
121 | const char *hostname, |
122 | int port, |
123 | int *waitp) |
124 | { |
125 | return Curl_resolver_getaddrinfo(conn, hostname, port, waitp); |
126 | } |
127 | |
128 | #endif /* CURLRES_ASYNCH */ |
129 | |