summaryrefslogtreecommitdiff
path: root/lib/hostasyn.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/hostasyn.c')
-rw-r--r--lib/hostasyn.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/lib/hostasyn.c b/lib/hostasyn.c
new file mode 100644
index 000000000..93e2c31cd
--- /dev/null
+++ b/lib/hostasyn.c
@@ -0,0 +1,157 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2012, 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.
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#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 __VMS
+#include <in.h>
+#include <inet.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>
+
+#include "curl_memory.h"
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/***********************************************************************
+ * Only for builds using asynchronous name resolves
+ **********************************************************************/
+#ifdef CURLRES_ASYNCH
+
+/*
+ * Curl_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, this function takes
+ * ownership of the Curl_addrinfo passed, storing the resolved data
+ * in the DNS cache.
+ *
+ * The storage operation locks and unlocks the DNS cache.
+ */
+CURLcode Curl_addrinfo_callback(struct connectdata *conn,
+ int status,
+ struct Curl_addrinfo *ai)
+{
+ struct Curl_dns_entry *dns = NULL;
+ CURLcode rc = CURLE_OK;
+
+ conn->async.status = status;
+
+ if(CURL_ASYNC_SUCCESS == status) {
+ 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;
+}
+
+/* Call this function after Curl_connect() has returned async=TRUE and
+ then a successful name resolve has been received.
+
+ Note: this function disconnects and frees the conn data in case of
+ resolve failure */
+CURLcode Curl_async_resolved(struct connectdata *conn,
+ bool *protocol_done)
+{
+ CURLcode code;
+
+ if(conn->async.dns) {
+ conn->dns_entry = conn->async.dns;
+ conn->async.dns = NULL;
+ }
+
+ code = Curl_setup_conn(conn, protocol_done);
+
+ if(code)
+ /* We're not allowed to return failure with memory left allocated
+ in the connectdata struct, free those here */
+ Curl_disconnect(conn, FALSE); /* close the connection */
+
+ return code;
+}
+
+/*
+ * Curl_getaddrinfo() is the generic low-level name resolve API within this
+ * source file. There are several versions of this function - for different
+ * name resolve layers (selected at build-time). They all take this same set
+ * of arguments
+ */
+Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
+ const char *hostname,
+ int port,
+ int *waitp)
+{
+ return Curl_resolver_getaddrinfo(conn, hostname, port, waitp);
+}
+
+#endif /* CURLRES_ASYNCH */