/*
This file is part of GNUnet.
- (C) 2010 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2010-2014, 2016 GNUnet e.V.
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* @author Christian Grothoff
*/
#include "platform.h"
-#include "gnunet_client_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_arm_service.h"
#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_server_lib.h"
-#include "gnunet_time_lib.h"
#include "gnunet_transport_service.h"
#include "transport.h"
/**
* Connection to transport service.
*/
- struct GNUNET_CLIENT_Connection * client;
-
- /**
- * Scheduler to use.
- */
- struct GNUNET_SCHEDULER_Handle *sched;
+ struct GNUNET_MQ_Handle *mq;
/**
* Configuration to use.
*/
const struct GNUNET_CONFIGURATION_Handle *cfg;
- /**
- * Pending handle for the current request.
- */
- struct GNUNET_CLIENT_TransmitHandle *th;
-
/**
* Function to call for determining if a peer is allowed
* to communicate with us.
GNUNET_TRANSPORT_BlacklistCallback cb;
/**
- * Closure for 'cb'.
+ * Closure for @e cb.
*/
- void *cb_cls;
-
- /**
- * Peer currently under consideration.
- */
- struct GNUNET_PeerIdentity peer;
+ void *cb_cls;
};
reconnect (struct GNUNET_TRANSPORT_Blacklist *br);
-/**
- * Send our reply to a blacklisting request.
- *
- * @param br our overall context
- */
-static void
-reply (struct GNUNET_TRANSPORT_Blacklist *br);
-
-
/**
* Handle blacklist queries.
*
* @param cls our overall handle
- * @param msg query
+ * @param bm query
*/
static void
-query_handler (void *cls,
- const struct GNUNET_MessageHeader *msg)
+handle_query (void *cls,
+ const struct BlacklistMessage *bm)
{
struct GNUNET_TRANSPORT_Blacklist *br = cls;
- const struct BlacklistMessage *bm;
-
- if ( (ntohs(msg->size) != sizeof (struct BlacklistMessage)) ||
- (ntohs(msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY) )
- {
- reconnect (br);
- return;
- }
- bm = (const struct BlacklistMessage *)msg;
+ struct GNUNET_MQ_Envelope *env;
+ struct BlacklistMessage *res;
+
GNUNET_break (0 == ntohl (bm->is_allowed));
- br->peer = bm->peer;
- reply (br);
+ env = GNUNET_MQ_msg (res,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY);
+ res->is_allowed = htonl (br->cb (br->cb_cls,
+ &bm->peer));
+ res->peer = bm->peer;
+ GNUNET_MQ_send (br->mq,
+ env);
}
-
/**
- * Receive blacklist queries from transport service.
+ * Generic error handler, called with the appropriate error code and
+ * the same closure specified at the creation of the message queue.
+ * Not every message queue implementation supports an error handler.
*
- * @param br overall handle
+ * @param cls closure with the `struct GNUNET_TRANSPORT_Blacklist *`
+ * @param error error code
*/
static void
-receive (struct GNUNET_TRANSPORT_Blacklist *br)
-{
- GNUNET_CLIENT_receive (br->client,
- &query_handler,
- br,
- GNUNET_TIME_UNIT_FOREVER_REL);
-}
-
-
-/**
- * Transmit the blacklist initialization request to the service.
- *
- * @param cls closure (struct GNUNET_TRANSPORT_Blacklist*)
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
- */
-static size_t
-transmit_blacklist_init (void *cls,
- size_t size, void *buf)
+mq_error_handler (void *cls,
+ enum GNUNET_MQ_Error error)
{
struct GNUNET_TRANSPORT_Blacklist *br = cls;
- struct GNUNET_MessageHeader req;
- if (buf == NULL)
- {
- reconnect (br);
- return 0;
- }
- req.size = htons (sizeof (struct GNUNET_MessageHeader));
- req.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT);
- memcpy (buf, &req, sizeof (req));
- receive (br);
- return sizeof (req);
+ reconnect (br);
}
static void
reconnect (struct GNUNET_TRANSPORT_Blacklist *br)
{
- if (br->client != NULL)
- GNUNET_CLIENT_disconnect (br->client, GNUNET_NO);
- br->client = GNUNET_CLIENT_connect (br->sched,
- "transport",
- br->cfg);
- br->th = GNUNET_CLIENT_notify_transmit_ready (br->client,
- sizeof (struct GNUNET_MessageHeader),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES,
- &transmit_blacklist_init,
- br);
-}
-
-
-/**
- * Transmit the blacklist response to the service.
- *
- * @param cls closure (struct GNUNET_TRANSPORT_Blacklist*)
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
- */
-static size_t
-transmit_blacklist_reply (void *cls,
- size_t size, void *buf)
-{
- struct GNUNET_TRANSPORT_Blacklist *br = cls;
- struct BlacklistMessage req;
-
- if (buf == NULL)
- {
- reconnect (br);
- return 0;
- }
- req.header.size = htons (sizeof (req));
- req.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_REPLY);
- req.is_allowed = htonl (br->cb (br->cb_cls, &br->peer));
- req.peer = br->peer;
- memcpy (buf, &req, sizeof (req));
- receive (br);
- return sizeof (req);
-}
-
-
-/**
- * Send our reply to a blacklisting request.
- *
- * @param br our overall context
- */
-static void
-reply (struct GNUNET_TRANSPORT_Blacklist *br)
-{
- br->th = GNUNET_CLIENT_notify_transmit_ready (br->client,
- sizeof (struct BlacklistMessage),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_NO,
- &transmit_blacklist_reply,
- br);
- if (br->th == NULL)
- {
- reconnect (br);
- return;
- }
+ struct GNUNET_MQ_MessageHandler handlers[] = {
+ GNUNET_MQ_hd_fixed_size (query,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_QUERY,
+ struct BlacklistMessage,
+ br),
+ GNUNET_MQ_handler_end ()
+ };
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_MessageHeader *req;
+
+ if (NULL != br->mq)
+ GNUNET_MQ_destroy (br->mq);
+ br->mq = GNUNET_CLIENT_connect (br->cfg,
+ "transport",
+ handlers,
+ &mq_error_handler,
+ br);
+ if (NULL == br->mq)
+ return;
+ env = GNUNET_MQ_msg (req,
+ GNUNET_MESSAGE_TYPE_TRANSPORT_BLACKLIST_INIT);
+ GNUNET_MQ_send (br->mq,
+ env);
}
* only way to re-enable connections from peers that were previously
* blacklisted.
*
- * @param sched scheduler to use
* @param cfg configuration to use
* @param cb callback to invoke to check if connections are allowed
- * @param cb_cls closure for cb
+ * @param cb_cls closure for @a cb
* @return NULL on error, otherwise handle for cancellation
*/
struct GNUNET_TRANSPORT_Blacklist *
-GNUNET_TRANSPORT_blacklist (struct GNUNET_SCHEDULER_Handle *sched,
- const struct GNUNET_CONFIGURATION_Handle *cfg,
- GNUNET_TRANSPORT_BlacklistCallback cb,
- void *cb_cls)
+GNUNET_TRANSPORT_blacklist (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_TRANSPORT_BlacklistCallback cb,
+ void *cb_cls)
{
- struct GNUNET_CLIENT_Connection * client;
- struct GNUNET_TRANSPORT_Blacklist *ret;
-
- client = GNUNET_CLIENT_connect (sched, "transport", cfg);
- if (NULL == client)
+ struct GNUNET_TRANSPORT_Blacklist *br;
+
+ br = GNUNET_new (struct GNUNET_TRANSPORT_Blacklist);
+ br->cfg = cfg;
+ br->cb = cb;
+ br->cb_cls = cb_cls;
+ reconnect (br);
+ if (NULL == br->mq)
+ {
+ GNUNET_free (br);
return NULL;
- ret = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_Blacklist));
- ret->client = client;
- ret->sched = sched;
- ret->cfg = cfg;
- ret->th = GNUNET_CLIENT_notify_transmit_ready (client,
- sizeof (struct GNUNET_MessageHeader),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES,
- &transmit_blacklist_init,
- ret);
- return ret;
+ }
+ return br;
}
void
GNUNET_TRANSPORT_blacklist_cancel (struct GNUNET_TRANSPORT_Blacklist *br)
{
- if (br->th != NULL)
- GNUNET_CLIENT_notify_transmit_ready_cancel (br->th);
- GNUNET_CLIENT_disconnect (br->client, GNUNET_NO);
+ GNUNET_MQ_destroy (br->mq);
GNUNET_free (br);
}
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