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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/
#include "setup.h"
#include <string.h>
#include <errno.h>
#define _REENTRANT
#if defined(WIN32) && !defined(__GNUC__) || defined(__MINGW32__)
#include <malloc.h>
#else
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h> /* required for free() prototypes */
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for the close() proto */
#endif
#ifdef VMS
#include <in.h>
#include <inet.h>
#include <stdlib.h>
#endif
#endif
#ifdef HAVE_SETJMP_H
#include <setjmp.h>
#endif
#ifdef WIN32
#include <process.h>
#endif
#if (defined(NETWARE) && defined(__NOVELL_LIBC__))
#undef in_addr_t
#define in_addr_t unsigned long
#endif
#include "urldata.h"
#include "sendf.h"
#include "hostip.h"
#include "hash.h"
#include "share.h"
#include "strerror.h"
#include "url.h"
#define _MPRINTF_REPLACE /* use our functions only */
#include <curl/mprintf.h>
#if defined(HAVE_INET_NTOA_R) && !defined(HAVE_INET_NTOA_R_DECL)
#include "inet_ntoa_r.h"
#endif
#include "memory.h"
/* The last #include file should be: */
#include "memdebug.h"
/***********************************************************************
* Only for builds using asynchronous name resolves
**********************************************************************/
#ifdef CURLRES_ASYNCH
/*
* addrinfo_callback() gets called by ares, gethostbyname_thread() or
* getaddrinfo_thread() when we got the name resolved (or not!).
*
* If the status argument is CURL_ASYNC_SUCCESS, we might need to copy the
* address field since it might be freed when this function returns. This
* operation stores the resolved data in the DNS cache.
*
* NOTE: for IPv6 operations, Curl_addrinfo_copy() returns the same
* pointer it is given as argument!
*
* The storage operation locks and unlocks the DNS cache.
*/
static CURLcode addrinfo_callback(void *arg, /* "struct connectdata *" */
int status,
void *addr)
{
struct connectdata *conn = (struct connectdata *)arg;
struct Curl_dns_entry *dns = NULL;
CURLcode rc = CURLE_OK;
conn->async.status = status;
if(CURL_ASYNC_SUCCESS == status) {
/*
* IPv4: Curl_addrinfo_copy() copies the address and returns an allocated
* version.
*
* IPv6: Curl_addrinfo_copy() returns the input pointer!
*/
Curl_addrinfo *ai = Curl_addrinfo_copy(addr, conn->async.port);
if(ai) {
struct SessionHandle *data = conn->data;
if(data->share)
Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
dns = Curl_cache_addr(data, ai,
conn->async.hostname,
conn->async.port);
if(!dns) {
/* failed to store, cleanup and return error */
Curl_freeaddrinfo(ai);
rc = CURLE_OUT_OF_MEMORY;
}
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
}
else
rc = CURLE_OUT_OF_MEMORY;
}
conn->async.dns = dns;
/* Set async.done TRUE last in this function since it may be used multi-
threaded and once this is TRUE the other thread may read fields from the
async struct */
conn->async.done = TRUE;
/* ipv4: The input hostent struct will be freed by ares when we return from
this function */
return rc;
}
CURLcode Curl_addrinfo4_callback(void *arg, /* "struct connectdata *" */
int status,
struct hostent *hostent)
{
return addrinfo_callback(arg, status, hostent);
}
#ifdef CURLRES_IPV6
CURLcode Curl_addrinfo6_callback(void *arg, /* "struct connectdata *" */
int status,
struct addrinfo *ai)
{
return addrinfo_callback(arg, status, ai);
}
#endif
#endif /* CURLRES_ASYNC */
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