| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 1998 - 2007, 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> |
| |
| #ifdef NEED_MALLOC_H |
| #include <malloc.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 |
| |
| #ifdef HAVE_SETJMP_H |
| #include <setjmp.h> |
| #endif |
| |
| #ifdef HAVE_PROCESS_H |
| #include <process.h> |
| #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/ares: 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, |
| #ifdef HAVE_CARES_CALLBACK_TIMEOUTS |
| int timeouts, |
| #endif |
| struct hostent *hostent) |
| { |
| #ifdef HAVE_CARES_CALLBACK_TIMEOUTS |
| (void)timeouts; /* ignored */ |
| #endif |
| return addrinfo_callback(arg, status, hostent); |
| } |
| |
| #ifdef CURLRES_IPV6 |
| CURLcode Curl_addrinfo6_callback(void *arg, /* "struct connectdata *" */ |
| int status, |
| #ifdef HAVE_CARES_CALLBACK_TIMEOUTS |
| int timeouts, |
| #endif |
| struct addrinfo *ai) |
| { |
| /* NOTE: for CURLRES_ARES, the 'ai' argument is really a |
| * 'struct hostent' pointer. |
| */ |
| #ifdef HAVE_CARES_CALLBACK_TIMEOUTS |
| (void)timeouts; /* ignored */ |
| #endif |
| return addrinfo_callback(arg, status, ai); |
| } |
| #endif |
| |
| #endif /* CURLRES_ASYNC */ |