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Diffstat (limited to 'Utilities/cmcurl/lib/hostasyn.c')
| -rw-r--r-- | Utilities/cmcurl/lib/hostasyn.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/hostasyn.c b/Utilities/cmcurl/lib/hostasyn.c new file mode 100644 index 0000000..3df1479 --- /dev/null +++ b/Utilities/cmcurl/lib/hostasyn.c @@ -0,0 +1,174 @@ +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2006, 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_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 + +#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, + 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) +{ + /* NOTE: for CURLRES_ARES, the 'ai' argument is really a + * 'struct hostent' pointer. + */ + return addrinfo_callback(arg, status, ai); +} +#endif + +#endif /* CURLRES_ASYNC */ |