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Diffstat (limited to 'lib/hostasyn.c')
| -rw-r--r-- | lib/hostasyn.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/lib/hostasyn.c b/lib/hostasyn.c new file mode 100644 index 000000000..a38c772d2 --- /dev/null +++ b/lib/hostasyn.c @@ -0,0 +1,152 @@ +/*************************************************************************** + * _ _ ____ _ + * 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 + +/* The last #include file should be: */ +#ifdef CURLDEBUG +#include "memdebug.h" +#endif + +/*********************************************************************** + * Only for builds using asynchronous name resolves + **********************************************************************/ +#ifdef CURLRES_ASYNCH +/* + * Curl_addrinfo_callback() gets called by ares/gethostbyname_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. + */ +void Curl_addrinfo_callback(void *arg, /* "struct connectdata *" */ + int status, + Curl_addrinfo *hostent) +{ + struct connectdata *conn = (struct connectdata *)arg; + struct Curl_dns_entry *dns = NULL; + + conn->async.done = TRUE; + 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 *he = Curl_addrinfo_copy(hostent); + if(he) { + 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, he, + conn->async.hostname, + conn->async.port); + + if(data->share) + Curl_share_unlock(data, CURL_LOCK_DATA_DNS); + } + } + + conn->async.dns = dns; + + /* ipv4: The input hostent struct will be freed by ares when we return from + this function */ +} + +#endif /* CURLRES_ASYNC */ |