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154 lines
4.5 KiB
154 lines
4.5 KiB
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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***************************************************************************/
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#include "curl_setup.h"
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/***********************************************************************
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* Only for builds using asynchronous name resolves
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**********************************************************************/
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#ifdef CURLRES_ASYNCH
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#ifdef HAVE_NETINET_IN_H
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#include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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#include <arpa/inet.h>
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#endif
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#ifdef __VMS
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#include <in.h>
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#include <inet.h>
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#endif
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#ifdef HAVE_PROCESS_H
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#include <process.h>
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#endif
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#include "urldata.h"
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#include "sendf.h"
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#include "hostip.h"
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#include "hash.h"
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#include "share.h"
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#include "strerror.h"
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#include "url.h"
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#include "curl_memory.h"
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/* The last #include file should be: */
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#include "memdebug.h"
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/*
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* Curl_addrinfo_callback() gets called by ares, gethostbyname_thread()
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* or getaddrinfo_thread() when we got the name resolved (or not!).
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*
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* If the status argument is CURL_ASYNC_SUCCESS, this function takes
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* ownership of the Curl_addrinfo passed, storing the resolved data
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* in the DNS cache.
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*
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* The storage operation locks and unlocks the DNS cache.
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*/
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CURLcode Curl_addrinfo_callback(struct connectdata *conn,
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int status,
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struct Curl_addrinfo *ai)
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{
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struct Curl_dns_entry *dns = NULL;
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CURLcode result = CURLE_OK;
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conn->async.status = status;
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if(CURL_ASYNC_SUCCESS == status) {
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if(ai) {
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struct Curl_easy *data = conn->data;
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if(data->share)
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Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
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dns = Curl_cache_addr(data, ai,
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conn->async.hostname,
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conn->async.port);
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if(!dns) {
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/* failed to store, cleanup and return error */
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Curl_freeaddrinfo(ai);
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result = CURLE_OUT_OF_MEMORY;
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}
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if(data->share)
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Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
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}
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else {
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result = CURLE_OUT_OF_MEMORY;
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}
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}
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conn->async.dns = dns;
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/* Set async.done TRUE last in this function since it may be used multi-
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threaded and once this is TRUE the other thread may read fields from the
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async struct */
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conn->async.done = TRUE;
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/* IPv4: The input hostent struct will be freed by ares when we return from
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this function */
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return result;
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}
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/* Call this function after Curl_connect() has returned async=TRUE and
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then a successful name resolve has been received.
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Note: this function disconnects and frees the conn data in case of
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resolve failure */
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CURLcode Curl_async_resolved(struct connectdata *conn,
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bool *protocol_done)
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{
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CURLcode result;
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if(conn->async.dns) {
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conn->dns_entry = conn->async.dns;
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conn->async.dns = NULL;
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}
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result = Curl_setup_conn(conn, protocol_done);
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if(result)
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/* We're not allowed to return failure with memory left allocated
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in the connectdata struct, free those here */
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Curl_disconnect(conn, FALSE); /* close the connection */
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return result;
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}
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/*
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* Curl_getaddrinfo() is the generic low-level name resolve API within this
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* source file. There are several versions of this function - for different
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* name resolve layers (selected at build-time). They all take this same set
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* of arguments
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*/
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Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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const char *hostname,
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int port,
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int *waitp)
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{
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return Curl_resolver_getaddrinfo(conn, hostname, port, waitp);
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}
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#endif /* CURLRES_ASYNCH */
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