176 lines
5.0 KiB
C
176 lines
5.0 KiB
C
/***************************************************************************
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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 - 2008, 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 http://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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* $Id: hostasyn.c,v 1.22 2008-10-30 13:45:25 yangtse Exp $
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***************************************************************************/
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#include "setup.h"
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#include <string.h>
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#ifdef NEED_MALLOC_H
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#include <malloc.h>
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#endif
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#ifdef HAVE_SYS_SOCKET_H
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#include <sys/socket.h>
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#endif
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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 HAVE_STDLIB_H
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#include <stdlib.h> /* required for free() prototypes */
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h> /* for the close() proto */
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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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#include <stdlib.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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#define _MPRINTF_REPLACE /* use our functions only */
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#include <curl/mprintf.h>
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#include "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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* Only for builds using asynchronous name resolves
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**********************************************************************/
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#ifdef CURLRES_ASYNCH
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/*
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* addrinfo_callback() gets called by ares, gethostbyname_thread() or
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* 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, we might need to copy the
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* address field since it might be freed when this function returns. This
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* operation stores the resolved data in the DNS cache.
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*
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* NOTE: for IPv6 operations, Curl_addrinfo_copy() returns the same
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* pointer it is given as argument!
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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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static CURLcode addrinfo_callback(void *arg, /* "struct connectdata *" */
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int status,
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void *addr)
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{
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struct connectdata *conn = (struct connectdata *)arg;
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struct Curl_dns_entry *dns = NULL;
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CURLcode rc = CURLE_OK;
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conn->async.status = status;
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if(CURL_ASYNC_SUCCESS == status) {
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/*
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* IPv4/ares: Curl_addrinfo_copy() copies the address and returns an
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* allocated version.
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*
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* IPv6: Curl_addrinfo_copy() returns the input pointer!
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*/
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Curl_addrinfo *ai = Curl_addrinfo_copy(addr, conn->async.port);
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if(ai) {
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struct SessionHandle *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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rc = 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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rc = CURLE_OUT_OF_MEMORY;
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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 rc;
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}
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CURLcode Curl_addrinfo4_callback(void *arg, /* "struct connectdata *" */
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int status,
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#ifdef HAVE_CARES_CALLBACK_TIMEOUTS
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int timeouts,
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#endif
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struct hostent *hostent)
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{
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#ifdef HAVE_CARES_CALLBACK_TIMEOUTS
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(void)timeouts; /* ignored */
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#endif
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return addrinfo_callback(arg, status, hostent);
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}
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#ifdef CURLRES_IPV6
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CURLcode Curl_addrinfo6_callback(void *arg, /* "struct connectdata *" */
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int status,
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#ifdef HAVE_CARES_CALLBACK_TIMEOUTS
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int timeouts,
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#endif
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Curl_addrinfo *ai)
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{
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/* NOTE: for CURLRES_ARES, the 'ai' argument is really a
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* 'struct hostent' pointer.
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*/
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#ifdef HAVE_CARES_CALLBACK_TIMEOUTS
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(void)timeouts; /* ignored */
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#endif
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return addrinfo_callback(arg, status, ai);
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}
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#endif
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#endif /* CURLRES_ASYNC */
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