/*
This file is part of GNUnet.
- (C) 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2011, 2017 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 3, or (at your
option) any later version.
+
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
+
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.
*/
-
/**
* @file cadet/cadet_api.c
- * @brief cadet api: client implementation of new cadet service
+ * @brief cadet api: client implementation of cadet service
* @author Bartlomiej Polot
+ * @author Christian Grothoff
*/
-
#include "platform.h"
#include "gnunet_util_lib.h"
+#include "gnunet_constants.h"
#include "gnunet_cadet_service.h"
#include "cadet.h"
#include "cadet_protocol.h"
#define LOG(kind,...) GNUNET_log_from (kind, "cadet-api",__VA_ARGS__)
-/******************************************************************************/
-/************************ DATA STRUCTURES ****************************/
-/******************************************************************************/
-
/**
- * Transmission queue to the service
+ * Ugly legacy hack.
*/
-struct GNUNET_CADET_TransmitHandle
+union CadetInfoCB
{
- /**
- * Double Linked list
- */
- struct GNUNET_CADET_TransmitHandle *next;
-
- /**
- * Double Linked list
- */
- struct GNUNET_CADET_TransmitHandle *prev;
-
- /**
- * Channel this message is sent on / for (may be NULL for control messages).
- */
- struct GNUNET_CADET_Channel *channel;
-
- /**
- * Callback to obtain the message to transmit, or NULL if we
- * got the message in 'data'. Notice that messages built
- * by 'notify' need to be encapsulated with information about
- * the 'target'.
- */
- GNUNET_CONNECTION_TransmitReadyNotify notify;
-
- /**
- * Closure for 'notify'
- */
- void *notify_cls;
-
- /**
- * How long is this message valid. Once the timeout has been
- * reached, the message must no longer be sent. If this
- * is a message with a 'notify' callback set, the 'notify'
- * function should be called with 'buf' NULL and size 0.
- */
- struct GNUNET_TIME_Absolute timeout;
-
- /**
- * Task triggering a timeout, can be NO_TASK if the timeout is FOREVER.
- */
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
-
- /**
- * Size of 'data' -- or the desired size of 'notify' if 'data' is NULL.
- */
- size_t size;
-};
-
-union CadetInfoCB {
-
/**
* Channel callback.
*/
*/
struct GNUNET_CADET_Handle
{
-
- /**
- * Handle to the server connection, to send messages later
- */
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * Set of handlers used for processing incoming messages in the channels
- */
- const struct GNUNET_CADET_MessageHandler *message_handlers;
-
/**
- * Number of handlers in the handlers array.
+ * Message queue.
*/
- unsigned int n_handlers;
+ struct GNUNET_MQ_Handle *mq;
/**
* Ports open.
*/
- const uint32_t *ports;
+ struct GNUNET_CONTAINER_MultiHashMap *ports;
/**
- * Number of ports.
+ * Channels open.
*/
- unsigned int n_ports;
-
- /**
- * Double linked list of the channels this client is connected to, head.
- */
- struct GNUNET_CADET_Channel *channels_head;
-
- /**
- * Double linked list of the channels this client is connected to, tail.
- */
- struct GNUNET_CADET_Channel *channels_tail;
-
- /**
- * Callback for inbound channel creation
- */
- GNUNET_CADET_InboundChannelNotificationHandler *new_channel;
-
- /**
- * Callback for inbound channel disconnection
- */
- GNUNET_CADET_ChannelEndHandler *cleaner;
-
- /**
- * Handle to cancel pending transmissions in case of disconnection
- */
- struct GNUNET_CLIENT_TransmitHandle *th;
-
- /**
- * Closure for all the handlers given by the client
- */
- void *cls;
-
- /**
- * Messages to send to the service, head.
- */
- struct GNUNET_CADET_TransmitHandle *th_head;
-
- /**
- * Messages to send to the service, tail.
- */
- struct GNUNET_CADET_TransmitHandle *th_tail;
-
- /**
- * chid of the next channel to create (to avoid reusing IDs often)
- */
- CADET_ChannelNumber next_chid;
-
- /**
- * Have we started the task to receive messages from the service
- * yet? We do this after we send the 'CADET_LOCAL_CONNECT' message.
- */
- int in_receive;
+ struct GNUNET_CONTAINER_MultiHashMap32 *channels;
/**
- * Configuration given by the client, in case of reconnection
+ * child of the next channel to create (to avoid reusing IDs often)
*/
- const struct GNUNET_CONFIGURATION_Handle *cfg;
+ struct GNUNET_CADET_ClientChannelNumber next_ccn;
/**
- * Time to the next reconnect in case one reconnect fails
+ * Configuration given by the client, in case of reconnection
*/
- struct GNUNET_TIME_Relative reconnect_time;
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Task for trying to reconnect.
*/
- GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+ struct GNUNET_SCHEDULER_Task *reconnect_task;
/**
* Callback for an info task (only one active at a time).
* Info callback closure for @c info_cb.
*/
void *info_cls;
-};
-
-
-/**
- * Description of a peer
- */
-struct GNUNET_CADET_Peer
-{
- /**
- * ID of the peer in short form
- */
- GNUNET_PEER_Id id;
/**
- * Channel this peer belongs to
+ * Time to the next reconnect in case one reconnect fails
*/
- struct GNUNET_CADET_Channel *t;
+ struct GNUNET_TIME_Relative reconnect_time;
+
};
struct GNUNET_CADET_Channel
{
- /**
- * DLL next
- */
- struct GNUNET_CADET_Channel *next;
-
- /**
- * DLL prev
- */
- struct GNUNET_CADET_Channel *prev;
+ /**
+ * Other end of the channel.
+ */
+ struct GNUNET_PeerIdentity peer;
- /**
- * Handle to the cadet this channel belongs to
- */
+ /**
+ * Handle to the cadet this channel belongs to
+ */
struct GNUNET_CADET_Handle *cadet;
- /**
- * Local ID of the channel
- */
- CADET_ChannelNumber chid;
+ /**
+ * Channel's port, if incoming.
+ */
+ struct GNUNET_CADET_Port *incoming_port;
- /**
- * Port number.
- */
- uint32_t port;
+ /**
+ * Any data the caller wants to put in here, used for the
+ * various callbacks (@e disconnects, @e window_changes, handlers).
+ */
+ void *ctx;
- /**
- * Other end of the channel.
- */
- GNUNET_PEER_Id peer;
+ /**
+ * Message Queue for the channel (which we are implementing).
+ */
+ struct GNUNET_MQ_Handle *mq;
/**
- * Any data the caller wants to put in here
+ * Task to allow mq to send more traffic.
*/
- void *ctx;
+ struct GNUNET_SCHEDULER_Task *mq_cont;
- /**
- * Size of packet queued in this channel
- */
- unsigned int packet_size;
+ /**
+ * Pending envelope with a message to be transmitted to the
+ * service as soon as we are allowed to. Should only be
+ * non-NULL if @e allow_send is 0.
+ */
+ struct GNUNET_MQ_Envelope *pending_env;
- /**
- * Channel options: reliability, etc.
- */
+ /**
+ * Window change handler.
+ */
+ GNUNET_CADET_WindowSizeEventHandler window_changes;
+
+ /**
+ * Disconnect handler.
+ */
+ GNUNET_CADET_DisconnectEventHandler disconnects;
+
+ /**
+ * Local ID of the channel, #GNUNET_CADET_LOCAL_CHANNEL_ID_CLI bit is set if outbound.
+ */
+ struct GNUNET_CADET_ClientChannelNumber ccn;
+
+ /**
+ * Channel options: reliability, etc.
+ */
enum GNUNET_CADET_ChannelOption options;
- /**
- * Are we allowed to send to the service?
- */
- int allow_send;
+ /**
+ * How many messages are we allowed to send to the service right now?
+ */
+ unsigned int allow_send;
};
/**
- * Implementation state for cadet's message queue.
+ * Opaque handle to a port.
*/
-struct CadetMQState
+struct GNUNET_CADET_Port
{
+
/**
- * The current transmit handle, or NULL
- * if no transmit is active.
+ * Port "number"
*/
- struct GNUNET_CADET_TransmitHandle *th;
+ struct GNUNET_HashCode id;
/**
- * Channel to send the data over.
+ * Handle to the CADET session this port belongs to.
*/
- struct GNUNET_CADET_Channel *channel;
-};
+ struct GNUNET_CADET_Handle *cadet;
+ /**
+ * Closure for @a handler.
+ */
+ void *cls;
-/******************************************************************************/
-/*********************** DECLARATIONS *************************/
-/******************************************************************************/
+ /**
+ * Handler for incoming channels on this port
+ */
+ GNUNET_CADET_ConnectEventHandler connects;
-/**
- * Function called to send a message to the service.
- * "buf" will be NULL and "size" zero if the socket was closed for writing in
- * the meantime.
- *
- * @param cls closure, the cadet handle
- * @param size number of bytes available in buf
- * @param buf where the callee should write the connect message
- * @return number of bytes written to buf
- */
-static size_t
-send_callback (void *cls, size_t size, void *buf);
+ /**
+ * Closure for @ref connects
+ */
+ void *connects_cls;
+ /**
+ * Window size change handler.
+ */
+ GNUNET_CADET_WindowSizeEventHandler window_changes;
-/******************************************************************************/
-/*********************** AUXILIARY FUNCTIONS *************************/
-/******************************************************************************/
+ /**
+ * Handler called when an incoming channel is destroyed.
+ */
+ GNUNET_CADET_DisconnectEventHandler disconnects;
-/**
- * Check if transmission is a payload packet.
- *
- * @param th Transmission handle.
- *
- * @return #GNUNET_YES if it is a payload packet,
- * #GNUNET_NO if it is a cadet management packet.
- */
-static int
-th_is_payload (struct GNUNET_CADET_TransmitHandle *th)
-{
- return (th->notify != NULL) ? GNUNET_YES : GNUNET_NO;
-}
+ /**
+ * Payload handlers for incoming channels.
+ */
+ struct GNUNET_MQ_MessageHandler *handlers;
+};
/**
- * Check whether there is any message ready in the queue and find the size.
+ * Find the Port struct for a hash.
*
- * @param h Cadet handle.
- *
- * @return The size of the first ready message in the queue,
- * 0 if there is none.
+ * @param h CADET handle.
+ * @param hash HashCode for the port number.
+ * @return The port handle if known, NULL otherwise.
*/
-static size_t
-message_ready_size (struct GNUNET_CADET_Handle *h)
+static struct GNUNET_CADET_Port *
+find_port (const struct GNUNET_CADET_Handle *h,
+ const struct GNUNET_HashCode *hash)
{
- struct GNUNET_CADET_TransmitHandle *th;
- struct GNUNET_CADET_Channel *ch;
-
- for (th = h->th_head; NULL != th; th = th->next)
- {
- ch = th->channel;
- if (GNUNET_NO == th_is_payload (th))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# message internal\n");
- return th->size;
- }
- if (GNUNET_YES == ch->allow_send)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# message payload ok\n");
- return th->size;
- }
- }
- return 0;
+ return GNUNET_CONTAINER_multihashmap_get (h->ports,
+ hash);
}
/**
* Get the channel handler for the channel specified by id from the given handle
+ *
* @param h Cadet handle
- * @param chid ID of the wanted channel
+ * @param ccn ID of the wanted channel
* @return handle to the required channel or NULL if not found
*/
static struct GNUNET_CADET_Channel *
-retrieve_channel (struct GNUNET_CADET_Handle *h, CADET_ChannelNumber chid)
+find_channel (struct GNUNET_CADET_Handle *h,
+ struct GNUNET_CADET_ClientChannelNumber ccn)
{
- struct GNUNET_CADET_Channel *ch;
-
- ch = h->channels_head;
- while (ch != NULL)
- {
- if (ch->chid == chid)
- return ch;
- ch = ch->next;
- }
- return NULL;
+ return GNUNET_CONTAINER_multihashmap32_get (h->channels,
+ ntohl (ccn.channel_of_client));
}
* Create a new channel and insert it in the channel list of the cadet handle
*
* @param h Cadet handle
- * @param chid Desired chid of the channel, 0 to assign one automatically.
- *
+ * @param ccnp pointer to desired ccn of the channel, NULL to assign one automatically.
* @return Handle to the created channel.
*/
static struct GNUNET_CADET_Channel *
-create_channel (struct GNUNET_CADET_Handle *h, CADET_ChannelNumber chid)
+create_channel (struct GNUNET_CADET_Handle *h,
+ const struct GNUNET_CADET_ClientChannelNumber *ccnp)
{
struct GNUNET_CADET_Channel *ch;
+ struct GNUNET_CADET_ClientChannelNumber ccn;
ch = GNUNET_new (struct GNUNET_CADET_Channel);
- GNUNET_CONTAINER_DLL_insert (h->channels_head, h->channels_tail, ch);
ch->cadet = h;
- if (0 == chid)
+ if (NULL == ccnp)
{
- ch->chid = h->next_chid;
- while (NULL != retrieve_channel (h, h->next_chid))
- {
- h->next_chid++;
- h->next_chid &= ~GNUNET_CADET_LOCAL_CHANNEL_ID_SERV;
- h->next_chid |= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI;
- }
+ while (NULL !=
+ find_channel (h,
+ h->next_ccn))
+ h->next_ccn.channel_of_client
+ = htonl (GNUNET_CADET_LOCAL_CHANNEL_ID_CLI | (1 + ntohl (h->next_ccn.channel_of_client)));
+ ccn = h->next_ccn;
}
else
{
- ch->chid = chid;
+ ccn = *ccnp;
}
- ch->allow_send = GNUNET_NO;
+ ch->ccn = ccn;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap32_put (h->channels,
+ ntohl (ch->ccn.channel_of_client),
+ ch,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
return ch;
}
*
* @param ch Pointer to the channel.
* @param call_cleaner Whether to call the cleaner handler.
- *
- * @return Handle to the required channel or NULL if not found.
*/
static void
-destroy_channel (struct GNUNET_CADET_Channel *ch, int call_cleaner)
+destroy_channel (struct GNUNET_CADET_Channel *ch)
{
- struct GNUNET_CADET_Handle *h;
- struct GNUNET_CADET_TransmitHandle *th;
- struct GNUNET_CADET_TransmitHandle *next;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, " destroy_channel %X\n", ch->chid);
+ struct GNUNET_CADET_Handle *h = ch->cadet;
- if (NULL == ch)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Destroying channel %X of %p\n",
+ ch->ccn,
+ h);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap32_remove (h->channels,
+ ntohl (ch->ccn.channel_of_client),
+ ch));
+ if (NULL != ch->mq_cont)
{
- GNUNET_break (0);
- return;
+ GNUNET_SCHEDULER_cancel (ch->mq_cont);
+ ch->mq_cont = NULL;
}
- h = ch->cadet;
-
- GNUNET_CONTAINER_DLL_remove (h->channels_head, h->channels_tail, ch);
-
/* signal channel destruction */
- if ( (NULL != h->cleaner) && (0 != ch->peer) && (GNUNET_YES == call_cleaner) )
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, " calling cleaner\n");
- h->cleaner (h->cls, ch, ch->ctx);
- }
-
- /* check that clients did not leave messages behind in the queue */
- for (th = h->th_head; NULL != th; th = next)
- {
- next = th->next;
- if (th->channel != ch)
- continue;
- /* Clients should have aborted their requests already.
- * Management traffic should be ok, as clients can't cancel that.
- * If the service crashed and we are reconnecting, it's ok.
- */
- GNUNET_break (GNUNET_NO == th_is_payload (th)
- || GNUNET_NO == h->in_receive);
- GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
-
- /* clean up request */
- if (GNUNET_SCHEDULER_NO_TASK != th->timeout_task)
- GNUNET_SCHEDULER_cancel (th->timeout_task);
- GNUNET_free (th);
- }
-
- /* if there are no more pending requests with cadet service, cancel active request */
- /* Note: this should be unnecessary... */
- if ((0 == message_ready_size (h)) && (NULL != h->th))
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
- }
-
- if (0 != ch->peer)
- GNUNET_PEER_change_rc (ch->peer, -1);
+ if (NULL != ch->disconnects)
+ ch->disconnects (ch->ctx,
+ ch);
+ if (NULL != ch->pending_env)
+ GNUNET_MQ_discard (ch->pending_env);
+ GNUNET_MQ_destroy (ch->mq);
GNUNET_free (ch);
- return;
}
/**
- * Notify client that the transmission has timed out
+ * Reconnect to the service, retransmit all infomation to try to restore the
+ * original state.
*
- * @param cls closure
- * @param tc task context
+ * @param h handle to the cadet
*/
static void
-timeout_transmission (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_CADET_TransmitHandle *th = cls;
- struct GNUNET_CADET_Handle *cadet;
-
- cadet = th->channel->cadet;
- GNUNET_CONTAINER_DLL_remove (cadet->th_head, cadet->th_tail, th);
- th->channel->packet_size = 0;
- if (GNUNET_YES == th_is_payload (th))
- th->notify (th->notify_cls, 0, NULL);
- GNUNET_free (th);
- if ((0 == message_ready_size (cadet)) && (NULL != cadet->th))
- {
- /* nothing ready to transmit, no point in asking for transmission */
- GNUNET_CLIENT_notify_transmit_ready_cancel (cadet->th);
- cadet->th = NULL;
- }
-}
+reconnect (struct GNUNET_CADET_Handle *h);
/**
- * Add a transmit handle to the transmission queue and set the
- * timeout if needed.
+ * Reconnect callback: tries to reconnect again after a failer previous
+ * reconnecttion
*
- * @param h cadet handle with the queue head and tail
- * @param th handle to the packet to be transmitted
+ * @param cls closure (cadet handle)
*/
static void
-add_to_queue (struct GNUNET_CADET_Handle *h,
- struct GNUNET_CADET_TransmitHandle *th)
+reconnect_cbk (void *cls)
{
- GNUNET_CONTAINER_DLL_insert_tail (h->th_head, h->th_tail, th);
- if (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us == th->timeout.abs_value_us)
- return;
- th->timeout_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
- (th->timeout), &timeout_transmission, th);
+ struct GNUNET_CADET_Handle *h = cls;
+
+ h->reconnect_task = NULL;
+ reconnect (h);
}
/**
- * Auxiliary function to send an already constructed packet to the service.
- * Takes care of creating a new queue element, copying the message and
- * calling the tmt_rdy function if necessary.
+ * Function called during #reconnect() to destroy
+ * all channels that are still open.
*
- * @param h cadet handle
- * @param msg message to transmit
- * @param channel channel this send is related to (NULL if N/A)
+ * @param cls the `struct GNUNET_CADET_Handle`
+ * @param cid chanenl ID
+ * @param value a `struct GNUNET_CADET_Channel` to destroy
+ * @return #GNUNET_OK (continue to iterate)
*/
-static void
-send_packet (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *msg,
- struct GNUNET_CADET_Channel *channel);
+static int
+destroy_channel_on_reconnect_cb (void *cls,
+ uint32_t cid,
+ void *value)
+{
+ /* struct GNUNET_CADET_Handle *handle = cls; */
+ struct GNUNET_CADET_Channel *ch = value;
+
+ destroy_channel (ch);
+ return GNUNET_OK;
+}
/**
- * Send an ack on the channel to confirm the processing of a message.
+ * Reconnect to the service, retransmit all infomation to try to restore the
+ * original state.
*
- * @param ch Channel on which to send the ACK.
+ * @param h handle to the cadet
+ *
+ * @return #GNUNET_YES in case of sucess, #GNUNET_NO otherwise (service down...)
*/
static void
-send_ack (struct GNUNET_CADET_Channel *ch)
+schedule_reconnect (struct GNUNET_CADET_Handle *h)
{
- struct GNUNET_CADET_LocalAck msg;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending ACK on channel %X\n", ch->chid);
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK);
- msg.header.size = htons (sizeof (msg));
- msg.channel_id = htonl (ch->chid);
-
- send_packet (ch->cadet, &msg.header, ch);
- return;
+ if (NULL != h->reconnect_task)
+ return;
+ GNUNET_CONTAINER_multihashmap32_iterate (h->channels,
+ &destroy_channel_on_reconnect_cb,
+ h);
+ h->reconnect_task
+ = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
+ &reconnect_cbk,
+ h);
+ h->reconnect_time
+ = GNUNET_TIME_STD_BACKOFF (h->reconnect_time);
}
-
/**
- * Reconnect callback: tries to reconnect again after a failer previous
- * reconnecttion
- * @param cls closure (cadet handle)
- * @param tc task context
+ * Notify the application about a change in the window size (if needed).
+ *
+ * @param ch Channel to notify about.
*/
static void
-reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+notify_window_size (struct GNUNET_CADET_Channel *ch)
+{
+ if (NULL != ch->window_changes)
+ ch->window_changes (ch->ctx,
+ ch, /* FIXME: remove 'ch'? */
+ ch->allow_send);
+}
/**
- * Send a connect packet to the service with the applications and types
- * requested by the user.
- *
- * @param h The cadet handle.
+ * Transmit the next message from our queue.
*
+ * @param cls Closure (channel whose mq to activate).
*/
static void
-send_connect (struct GNUNET_CADET_Handle *h)
+cadet_mq_send_now (void *cls)
{
- size_t size;
+ struct GNUNET_CADET_Channel *ch = cls;
+ struct GNUNET_MQ_Envelope *env = ch->pending_env;
- size = sizeof (struct GNUNET_CADET_ClientConnect);
- size += h->n_ports * sizeof (uint32_t);
+ ch->mq_cont = NULL;
+ if (0 == ch->allow_send)
{
- char buf[size] GNUNET_ALIGN;
- struct GNUNET_CADET_ClientConnect *msg;
- uint32_t *ports;
- uint16_t i;
-
- /* build connection packet */
- msg = (struct GNUNET_CADET_ClientConnect *) buf;
- msg->header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_CONNECT);
- msg->header.size = htons (size);
- ports = (uint32_t *) &msg[1];
- for (i = 0; i < h->n_ports; i++)
- {
- ports[i] = htonl (h->ports[i]);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " port %u\n",
- h->ports[i]);
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Sending %lu bytes long message with %u ports\n",
- ntohs (msg->header.size), h->n_ports);
- send_packet (h, &msg->header, NULL);
+ /* how did we get here? */
+ GNUNET_break (0);
+ return;
+ }
+ if (NULL == env)
+ {
+ /* how did we get here? */
+ GNUNET_break (0);
+ return;
}
+ ch->allow_send--;
+ ch->pending_env = NULL;
+ GNUNET_MQ_send (ch->cadet->mq,
+ env);
+ GNUNET_MQ_impl_send_continue (ch->mq);
}
/**
- * Reconnect to the service, retransmit all infomation to try to restore the
- * original state.
+ * Implement sending functionality of a message queue for
+ * us sending messages to a peer.
*
- * @param h handle to the cadet
+ * Encapsulates the payload message in a #GNUNET_CADET_LocalData message
+ * in order to label the message with the channel ID and send the
+ * encapsulated message to the service.
*
- * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
+ * @param mq the message queue
+ * @param msg the message to send
+ * @param impl_state state of the implementation
*/
-static int
-do_reconnect (struct GNUNET_CADET_Handle *h)
+static void
+cadet_mq_send_impl (struct GNUNET_MQ_Handle *mq,
+ const struct GNUNET_MessageHeader *msg,
+ void *impl_state)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, "******* RECONNECT *******\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, "******** on %p *******\n", h);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "*****************************\n");
-
- /* disconnect */
- if (NULL != h->th)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
- }
- if (NULL != h->client)
+ struct GNUNET_CADET_Channel *ch = impl_state;
+ struct GNUNET_CADET_Handle *h = ch->cadet;
+ uint16_t msize;
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_CADET_LocalData *cadet_msg;
+
+ if (NULL == h->mq)
{
- GNUNET_CLIENT_disconnect (h->client);
+ /* We're currently reconnecting, pretend this worked */
+ GNUNET_MQ_impl_send_continue (mq);
+ return;
}
- /* connect again */
- h->client = GNUNET_CLIENT_connect ("cadet", h->cfg);
- if (h->client == NULL)
+ /* check message size for sanity */
+ msize = ntohs (msg->size);
+ if (msize > GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE)
{
- h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
- &reconnect_cbk, h);
- h->reconnect_time =
- GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
- GNUNET_TIME_relative_multiply
- (h->reconnect_time, 2));
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Next retry in %s\n",
- GNUNET_STRINGS_relative_time_to_string (h->reconnect_time,
- GNUNET_NO));
GNUNET_break (0);
- return GNUNET_NO;
- }
- else
- {
- h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
+ GNUNET_MQ_impl_send_continue (mq);
+ return;
}
- send_connect (h);
- return GNUNET_YES;
+ env = GNUNET_MQ_msg_nested_mh (cadet_msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
+ msg);
+ cadet_msg->ccn = ch->ccn;
+ GNUNET_assert (NULL == ch->pending_env);
+ ch->pending_env = env;
+ if (0 < ch->allow_send)
+ ch->mq_cont
+ = GNUNET_SCHEDULER_add_now (&cadet_mq_send_now,
+ ch);
}
+
/**
- * Reconnect callback: tries to reconnect again after a failer previous
- * reconnecttion
- * @param cls closure (cadet handle)
- * @param tc task context
+ * Handle destruction of a message queue. Implementations must not
+ * free @a mq, but should take care of @a impl_state.
+ *
+ * @param mq the message queue to destroy
+ * @param impl_state state of the implementation
*/
static void
-reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+cadet_mq_destroy_impl (struct GNUNET_MQ_Handle *mq,
+ void *impl_state)
{
- struct GNUNET_CADET_Handle *h = cls;
+ struct GNUNET_CADET_Channel *ch = impl_state;
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- do_reconnect (h);
+ GNUNET_assert (mq == ch->mq);
+ ch->mq = NULL;
}
/**
- * Reconnect to the service, retransmit all infomation to try to restore the
- * original state.
+ * We had an error processing a message we forwarded from a peer to
+ * the CADET service. We should just complain about it but otherwise
+ * continue processing.
*
- * @param h handle to the cadet
- *
- * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
+ * @param cls closure with our `struct GNUNET_CADET_Channel`
+ * @param error error code
*/
static void
-reconnect (struct GNUNET_CADET_Handle *h)
+cadet_mq_error_handler (void *cls,
+ enum GNUNET_MQ_Error error)
{
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_Channel *next;
+ struct GNUNET_CADET_Channel *ch = cls;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Requested RECONNECT, destroying all channels\n");
- h->in_receive = GNUNET_NO;
- for (ch = h->channels_head; NULL != ch; ch = next)
+ GNUNET_break (0);
+ if (GNUNET_MQ_ERROR_NO_MATCH == error)
+ {
+ /* Got a message we did not understand, still try to continue! */
+ GNUNET_CADET_receive_done (ch);
+ }
+ else
{
- next = ch->next;
- destroy_channel (ch, GNUNET_YES);
+ schedule_reconnect (ch->cadet);
}
- if (GNUNET_SCHEDULER_NO_TASK == h->reconnect_task)
- h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
- &reconnect_cbk, h);
}
-/******************************************************************************/
-/*********************** RECEIVE HANDLERS ****************************/
-/******************************************************************************/
+/**
+ * Implementation function that cancels the currently sent message.
+ * Should basically undo whatever #mq_send_impl() did.
+ *
+ * @param mq message queue
+ * @param impl_state state specific to the implementation
+ */
+static void
+cadet_mq_cancel_impl (struct GNUNET_MQ_Handle *mq,
+ void *impl_state)
+{
+ struct GNUNET_CADET_Channel *ch = impl_state;
+
+ GNUNET_assert (NULL != ch->pending_env);
+ GNUNET_MQ_discard (ch->pending_env);
+ ch->pending_env = NULL;
+ if (NULL != ch->mq_cont)
+ {
+ GNUNET_SCHEDULER_cancel (ch->mq_cont);
+ ch->mq_cont = NULL;
+ }
+}
+
/**
* Process the new channel notification and add it to the channels in the handle
* @param msg A message with the details of the new incoming channel
*/
static void
-process_channel_created (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_CADET_ChannelMessage *msg)
+handle_channel_created (void *cls,
+ const struct GNUNET_CADET_LocalChannelCreateMessage *msg)
{
+ struct GNUNET_CADET_Handle *h = cls;
struct GNUNET_CADET_Channel *ch;
- CADET_ChannelNumber chid;
- uint32_t port;
+ struct GNUNET_CADET_Port *port;
+ const struct GNUNET_HashCode *port_number;
+ struct GNUNET_CADET_ClientChannelNumber ccn;
- chid = ntohl (msg->channel_id);
- port = ntohl (msg->port);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating incoming channel %X:%u\n", chid, port);
- if (chid < GNUNET_CADET_LOCAL_CHANNEL_ID_SERV)
+ ccn = msg->ccn;
+ port_number = &msg->port;
+ if (ntohl (ccn.channel_of_client) >= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
{
GNUNET_break (0);
return;
}
- if (NULL != h->new_channel)
- {
- void *ctx;
-
- ch = create_channel (h, chid);
- ch->allow_send = GNUNET_NO;
- ch->peer = GNUNET_PEER_intern (&msg->peer);
- ch->cadet = h;
- ch->chid = chid;
- ch->port = port;
- ch->options = ntohl (msg->opt);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, " created channel %p\n", ch);
- ctx = h->new_channel (h->cls, ch, &msg->peer, ch->port, ch->options);
- if (NULL != ctx)
- ch->ctx = ctx;
- LOG (GNUNET_ERROR_TYPE_DEBUG, "User notified\n");
- }
- else
+ port = find_port (h,
+ port_number);
+ if (NULL == port)
{
- struct GNUNET_CADET_ChannelMessage d_msg;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "No handler for incoming channels\n");
-
- d_msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY);
- d_msg.header.size = htons (sizeof (struct GNUNET_CADET_ChannelMessage));
- d_msg.channel_id = msg->channel_id;
- memset (&d_msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
- d_msg.port = 0;
- d_msg.opt = 0;
+ /* We could have closed the port but the service didn't know about it yet
+ * This is not an error.
+ */
+ struct GNUNET_CADET_LocalChannelDestroyMessage *d_msg;
+ struct GNUNET_MQ_Envelope *env;
- send_packet (h, &d_msg.header, NULL);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "No handler for incoming channel %X (on port %s, recently closed?)\n",
+ ntohl (ccn.channel_of_client),
+ GNUNET_h2s (port_number));
+ env = GNUNET_MQ_msg (d_msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
+ d_msg->ccn = msg->ccn;
+ GNUNET_MQ_send (h->mq,
+ env);
+ return;
}
- return;
+
+ ch = create_channel (h,
+ &ccn);
+ ch->peer = msg->peer;
+ ch->cadet = h;
+ ch->incoming_port = port;
+ ch->options = ntohl (msg->opt);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating incoming channel %X [%s] %p\n",
+ ntohl (ccn.channel_of_client),
+ GNUNET_h2s (port_number),
+ ch);
+
+ GNUNET_assert (NULL != port->connects);
+ ch->window_changes = port->window_changes;
+ ch->disconnects = port->disconnects;
+ ch->mq = GNUNET_MQ_queue_for_callbacks (&cadet_mq_send_impl,
+ &cadet_mq_destroy_impl,
+ &cadet_mq_cancel_impl,
+ ch,
+ port->handlers,
+ &cadet_mq_error_handler,
+ ch);
+ ch->ctx = port->connects (port->cls,
+ ch,
+ &msg->peer);
+ GNUNET_MQ_set_handlers_closure (ch->mq,
+ ch->ctx);
}
* @param msg A message with the details of the channel being destroyed
*/
static void
-process_channel_destroy (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_CADET_ChannelMessage *msg)
+handle_channel_destroy (void *cls,
+ const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
{
+ struct GNUNET_CADET_Handle *h = cls;
struct GNUNET_CADET_Channel *ch;
- CADET_ChannelNumber chid;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel Destroy received from service\n");
- chid = ntohl (msg->channel_id);
- ch = retrieve_channel (h, chid);
+ ch = find_channel (h,
+ msg->ccn);
if (NULL == ch)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "channel %X unknown\n", chid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received channel destroy for unknown channel %X from CADET service (recently close?)\n",
+ ntohl (msg->ccn.channel_of_client));
return;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG, " destroying channel %X\n", ch->chid);
- destroy_channel (ch, GNUNET_YES);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received channel destroy for channel %X from CADET service\n",
+ ntohl (msg->ccn.channel_of_client));
+ destroy_channel (ch);
+}
+
+
+/**
+ * Check that message received from CADET service is well-formed.
+ *
+ * @param cls the `struct GNUNET_CADET_Handle`
+ * @param message the message we got
+ * @return #GNUNET_OK if the message is well-formed,
+ * #GNUNET_SYSERR otherwise
+ */
+static int
+check_local_data (void *cls,
+ const struct GNUNET_CADET_LocalData *message)
+{
+ uint16_t size;
+
+ size = ntohs (message->header.size);
+ if (sizeof (*message) + sizeof (struct GNUNET_MessageHeader) > size)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
}
/**
* Process the incoming data packets, call appropriate handlers.
*
- * @param h The cadet handle
- * @param message A message encapsulating the data
+ * @param h The cadet handle
+ * @param message A message encapsulating the data
*/
static void
-process_incoming_data (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *message)
+handle_local_data (void *cls,
+ const struct GNUNET_CADET_LocalData *message)
{
+ struct GNUNET_CADET_Handle *h = cls;
const struct GNUNET_MessageHeader *payload;
- const struct GNUNET_CADET_MessageHandler *handler;
- struct GNUNET_CADET_LocalData *dmsg;
struct GNUNET_CADET_Channel *ch;
- size_t size;
- unsigned int i;
uint16_t type;
+ int fwd;
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a data message!\n");
- dmsg = (struct GNUNET_CADET_LocalData *) message;
- ch = retrieve_channel (h, ntohl (dmsg->id));
+ ch = find_channel (h,
+ message->ccn);
if (NULL == ch)
{
- GNUNET_break (0);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Unknown channel %X for incoming data (recently closed?)\n",
+ ntohl (message->ccn.channel_of_client));
return;
}
- payload = (struct GNUNET_MessageHeader *) &dmsg[1];
- LOG (GNUNET_ERROR_TYPE_DEBUG, " %s data on channel %s [%X]\n",
- GC_f2s (ch->chid >= GNUNET_CADET_LOCAL_CHANNEL_ID_SERV),
- GNUNET_i2s (GNUNET_PEER_resolve2 (ch->peer)), ntohl (dmsg->id));
-
- size = ntohs (message->size);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " %u bytes\n", size);
-
+ payload = (const struct GNUNET_MessageHeader *) &message[1];
type = ntohs (payload->type);
- size = ntohs (payload->size);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " payload type %s\n", GC_m2s (type));
- for (i = 0; i < h->n_handlers; i++)
- {
- handler = &h->message_handlers[i];
- LOG (GNUNET_ERROR_TYPE_DEBUG, " checking handler for type %u\n",
- handler->type);
- if (handler->type == type)
- {
- if (GNUNET_OK !=
- handler->callback (h->cls, ch, &ch->ctx, payload))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "callback caused disconnection\n");
- GNUNET_CADET_channel_destroy (ch);
- return;
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "callback completed successfully\n");
- return;
- }
- }
- }
+ fwd = ntohl (ch->ccn.channel_of_client) <= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Got a %s data on channel %s [%X] of type %u\n",
+ fwd ? "FWD" : "BWD",
+ GNUNET_i2s (&ch->peer),
+ ntohl (message->ccn.channel_of_client),
+ type);
+ GNUNET_MQ_inject_message (ch->mq,
+ payload);
}
* @param message Message itself.
*/
static void
-process_ack (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *message)
+handle_local_ack (void *cls,
+ const struct GNUNET_CADET_LocalAck *message)
{
- struct GNUNET_CADET_LocalAck *msg;
+ struct GNUNET_CADET_Handle *h = cls;
struct GNUNET_CADET_Channel *ch;
- CADET_ChannelNumber chid;
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK!\n");
- msg = (struct GNUNET_CADET_LocalAck *) message;
- chid = ntohl (msg->channel_id);
- ch = retrieve_channel (h, chid);
+ ch = find_channel (h,
+ message->ccn);
if (NULL == ch)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "ACK on unknown channel %X\n", chid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "ACK on unknown channel %X\n",
+ ntohl (message->ccn.channel_of_client));
return;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X!\n", ch->chid);
- ch->allow_send = GNUNET_YES;
- if (NULL == h->th && 0 < ch->packet_size)
+ ch->allow_send++;
+ if (NULL == ch->pending_env)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, " tmt rdy was NULL, requesting!\n");
- h->th = GNUNET_CLIENT_notify_transmit_ready (h->client, ch->packet_size,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES, &send_callback, h);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Got an ACK on mq channel %X, allow send now %u!\n",
+ ntohl (ch->ccn.channel_of_client),
+ ch->allow_send);
+ notify_window_size (ch);
+ return;
}
+ if (NULL != ch->mq_cont)
+ return; /* already working on it! */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Got an ACK on mq channel %X, sending pending message!\n",
+ ntohl (ch->ccn.channel_of_client));
+ ch->mq_cont
+ = GNUNET_SCHEDULER_add_now (&cadet_mq_send_now,
+ ch);
}
-/*
- * Process a local reply about info on all channels, pass info to the user.
+/**
+ * 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 h Cadet handle.
- * @param message Message itself.
+ * @param cls closure, a `struct GNUNET_CORE_Handle *`
+ * @param error error code
*/
-// static void
-// process_get_channels (struct GNUNET_CADET_Handle *h,
-// const struct GNUNET_MessageHeader *message)
-// {
-// struct GNUNET_CADET_LocalInfo *msg;
-//
-// GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Get Channels messasge received\n");
-//
-// if (NULL == h->channels_cb)
-// {
-// GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
-// return;
-// }
-//
-// msg = (struct GNUNET_CADET_LocalInfo *) message;
-// if (ntohs (message->size) !=
-// (sizeof (struct GNUNET_CADET_LocalInfo) +
-// sizeof (struct GNUNET_PeerIdentity)))
-// {
-// GNUNET_break_op (0);
-// GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-// "Get channels message: size %hu - expected %u\n",
-// ntohs (message->size),
-// sizeof (struct GNUNET_CADET_LocalInfo));
-// return;
-// }
-// h->channels_cb (h->channels_cls,
-// ntohl (msg->channel_id),
-// &msg->owner,
-// &msg->destination);
-// }
+static void
+handle_mq_error (void *cls,
+ enum GNUNET_MQ_Error error)
+{
+ struct GNUNET_CADET_Handle *h = cls;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "MQ ERROR: %u\n",
+ error);
+ GNUNET_MQ_destroy (h->mq);
+ h->mq = NULL;
+ reconnect (h);
+}
-/*
- * Process a local monitor_channel reply, pass info to the user.
+/**
+ * Process a local reply about info on all tunnels, pass info to the user.
*
- * @param h Cadet handle.
- * @param message Message itself.
+ * @param cls Closure (Cadet handle).
+ * @param msg Message itself.
*/
-// static void
-// process_show_channel (struct GNUNET_CADET_Handle *h,
-// const struct GNUNET_MessageHeader *message)
-// {
-// struct GNUNET_CADET_LocalInfo *msg;
-// size_t esize;
-//
-// GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Show Channel messasge received\n");
-//
-// if (NULL == h->channel_cb)
-// {
-// GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
-// return;
-// }
-//
-// /* Verify message sanity */
-// msg = (struct GNUNET_CADET_LocalInfo *) message;
-// esize = sizeof (struct GNUNET_CADET_LocalInfo);
-// if (ntohs (message->size) != esize)
-// {
-// GNUNET_break_op (0);
-// GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
-// "Show channel message: size %hu - expected %u\n",
-// ntohs (message->size),
-// esize);
-//
-// h->channel_cb (h->channel_cls, NULL, NULL);
-// h->channel_cb = NULL;
-// h->channel_cls = NULL;
-//
-// return;
-// }
-//
-// h->channel_cb (h->channel_cls,
-// &msg->destination,
-// &msg->owner);
-// }
+static void
+handle_get_peers (void *cls,
+ const struct GNUNET_CADET_LocalInfoPeer *msg)
+{
+ struct GNUNET_CADET_Handle *h = cls;
+ if (NULL == h->info_cb.peers_cb)
+ return;
+ h->info_cb.peers_cb (h->info_cls,
+ &msg->destination,
+ (int) ntohs (msg->tunnel),
+ (unsigned int) ntohs (msg->paths),
+ 0);
+}
/**
- * Process a local reply about info on all tunnels, pass info to the user.
+ * Check that message received from CADET service is well-formed.
*
- * @param h Cadet handle.
- * @param message Message itself.
+ * @param cls the `struct GNUNET_CADET_Handle`
+ * @param message the message we got
+ * @return #GNUNET_OK if the message is well-formed,
+ * #GNUNET_SYSERR otherwise
*/
-static void
-process_get_peers (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *message)
+static int
+check_get_peer (void *cls,
+ const struct GNUNET_CADET_LocalInfoPeer *message)
{
- struct GNUNET_CADET_LocalInfoPeer *msg;
- uint16_t size;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Peer messasge received\n");
+ size_t msize = sizeof (struct GNUNET_CADET_LocalInfoPeer);
+ const struct GNUNET_PeerIdentity *paths_array;
+ size_t esize;
+ unsigned int epaths;
+ unsigned int paths;
+ unsigned int peers;
- if (NULL == h->info_cb.peers_cb)
+ esize = ntohs (message->header.size);
+ if (esize < msize)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
- return;
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
-
- size = ntohs (message->size);
- if (sizeof (struct GNUNET_CADET_LocalInfoPeer) > size)
+ if (0 != ((esize - msize) % sizeof (struct GNUNET_PeerIdentity)))
{
- h->info_cb.peers_cb (h->info_cls, NULL, -1, 0, 0);
- h->info_cb.peers_cb = NULL;
- h->info_cls = NULL;
- return;
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
-
- msg = (struct GNUNET_CADET_LocalInfoPeer *) message;
- h->info_cb.peers_cb (h->info_cls, &msg->destination,
- (int) ntohs (msg->tunnel),
- (unsigned int ) ntohs (msg->paths),
- 0);
+ peers = (esize - msize) / sizeof (struct GNUNET_PeerIdentity);
+ epaths = ntohs (message->paths);
+ paths_array = (const struct GNUNET_PeerIdentity *) &message[1];
+ paths = 0;
+ for (unsigned int i = 0; i < peers; i++)
+ if (0 == memcmp (&paths_array[i],
+ &message->destination,
+ sizeof (struct GNUNET_PeerIdentity)))
+ paths++;
+ if (paths != epaths)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
}
/**
* Process a local peer info reply, pass info to the user.
*
- * @param h Cadet handle.
+ * @param cls Closure (Cadet handle).
* @param message Message itself.
*/
static void
-process_get_peer (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *message)
+handle_get_peer (void *cls,
+ const struct GNUNET_CADET_LocalInfoPeer *message)
{
- struct GNUNET_CADET_LocalInfoTunnel *msg;
- size_t esize;
- size_t msize;
+ struct GNUNET_CADET_Handle *h = cls;
+ const struct GNUNET_PeerIdentity *paths_array;
+ unsigned int paths;
+ unsigned int path_length;
+ int neighbor;
+ unsigned int peers;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Tunnel messasge received\n");
if (NULL == h->info_cb.peer_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
return;
- }
-
- /* Verify message sanity */
- msg = (struct GNUNET_CADET_LocalInfoTunnel *) message;
- msize = ntohs (message->size);
- esize = sizeof (struct GNUNET_CADET_LocalInfoPeer);
- if (esize > msize)
- {
- GNUNET_break_op (0);
- h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
- goto clean_cls;
- }
-// esize += ch_n * sizeof (CADET_ChannelNumber);
-// esize += c_n * sizeof (struct GNUNET_CADET_Hash);
- if (msize != esize)
+ paths = ntohs (message->paths);
+ paths_array = (const struct GNUNET_PeerIdentity *) &message[1];
+ peers = (ntohs (message->header.size) - sizeof (*message))
+ / sizeof (struct GNUNET_PeerIdentity);
+ path_length = 0;
+ neighbor = GNUNET_NO;
+
+ for (unsigned int i = 0; i < peers; i++)
{
- GNUNET_break_op (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "m:%u, e: %u\n", msize, esize);
- h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
- goto clean_cls;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ " %s\n",
+ GNUNET_i2s (&paths_array[i]));
+ path_length++;
+ if (0 == memcmp (&paths_array[i], &message->destination,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ if (1 == path_length)
+ neighbor = GNUNET_YES;
+ path_length = 0;
+ }
}
/* Call Callback with tunnel info. */
- h->info_cb.peer_cb (h->info_cls, &msg->destination, 0, 0, 0, NULL);
-
- clean_cls:
- h->info_cb.peer_cb = NULL;
- h->info_cls = NULL;
+ paths_array = (const struct GNUNET_PeerIdentity *) &message[1];
+ h->info_cb.peer_cb (h->info_cls,
+ &message->destination,
+ (int) ntohs (message->tunnel),
+ neighbor,
+ paths,
+ paths_array);
}
/**
* Process a local reply about info on all tunnels, pass info to the user.
*
- * @param h Cadet handle.
+ * @param cls Closure (Cadet handle).
* @param message Message itself.
*/
static void
-process_get_tunnels (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *message)
+handle_get_tunnels (void *cls,
+ const struct GNUNET_CADET_LocalInfoTunnel *msg)
{
- struct GNUNET_CADET_LocalInfoTunnel *msg;
- uint16_t size;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Tunnels messasge received\n");
+ struct GNUNET_CADET_Handle *h = cls;
if (NULL == h->info_cb.tunnels_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
- return;
- }
-
- size = ntohs (message->size);
- if (sizeof (struct GNUNET_CADET_LocalInfoTunnel) > size)
- {
- h->info_cb.tunnels_cb (h->info_cls, NULL, 0, 0, 0, 0);
- h->info_cb.tunnels_cb = NULL;
- h->info_cls = NULL;
return;
- }
-
- msg = (struct GNUNET_CADET_LocalInfoTunnel *) message;
- h->info_cb.tunnels_cb (h->info_cls, &msg->destination,
- ntohl (msg->channels), ntohl (msg->connections),
- ntohs (msg->estate), ntohs (msg->cstate));
+ h->info_cb.tunnels_cb (h->info_cls,
+ &msg->destination,
+ ntohl (msg->channels),
+ ntohl (msg->connections),
+ ntohs (msg->estate),
+ ntohs (msg->cstate));
}
/**
- * Process a local tunnel info reply, pass info to the user.
+ * Check that message received from CADET service is well-formed.
*
- * @param h Cadet handle.
- * @param message Message itself.
+ * @param cls the `struct GNUNET_CADET_Handle`
+ * @param msg the message we got
+ * @return #GNUNET_OK if the message is well-formed,
+ * #GNUNET_SYSERR otherwise
*/
-static void
-process_get_tunnel (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *message)
+static int
+check_get_tunnel (void *cls,
+ const struct GNUNET_CADET_LocalInfoTunnel *msg)
{
- struct GNUNET_CADET_LocalInfoTunnel *msg;
- size_t esize;
- size_t msize;
unsigned int ch_n;
unsigned int c_n;
- struct GNUNET_CADET_Hash *conns;
- CADET_ChannelNumber *chns;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Get Tunnel messasge received\n");
- if (NULL == h->info_cb.tunnel_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ignored\n");
- return;
- }
+ size_t esize;
+ size_t msize;
/* Verify message sanity */
- msg = (struct GNUNET_CADET_LocalInfoTunnel *) message;
- msize = ntohs (message->size);
+ msize = ntohs (msg->header.size);
esize = sizeof (struct GNUNET_CADET_LocalInfoTunnel);
if (esize > msize)
{
- GNUNET_break_op (0);
- h->info_cb.tunnel_cb (h->info_cls, NULL, 0, 0, NULL, NULL, 0, 0);
- goto clean_cls;
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
ch_n = ntohl (msg->channels);
c_n = ntohl (msg->connections);
- esize += ch_n * sizeof (CADET_ChannelNumber);
- esize += c_n * sizeof (struct GNUNET_CADET_Hash);
+ esize += ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber);
+ esize += c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier);
if (msize != esize)
{
GNUNET_break_op (0);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "m:%u, e: %u (%u ch, %u conn)\n",
- msize, esize, ch_n, c_n);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%u (%u ch, %u conn)\n",
- sizeof (struct GNUNET_CADET_LocalInfoTunnel),
- sizeof (CADET_ChannelNumber), sizeof (struct GNUNET_HashCode));
- h->info_cb.tunnel_cb (h->info_cls, NULL, 0, 0, NULL, NULL, 0, 0);
- goto clean_cls;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "m:%u, e: %u (%u ch, %u conn)\n",
+ (unsigned int) msize,
+ (unsigned int) esize,
+ ch_n,
+ c_n);
+ return GNUNET_SYSERR;
}
-
- /* Call Callback with tunnel info. */
- conns = (struct GNUNET_CADET_Hash *) &msg[1];
- chns = (CADET_ChannelNumber *) &conns[c_n];
- h->info_cb.tunnel_cb (h->info_cls, &msg->destination,
- ch_n, c_n, chns, conns,
- ntohs (msg->estate), ntohs (msg->cstate));
-
-clean_cls:
- h->info_cb.tunnel_cb = NULL;
- h->info_cls = NULL;
+ return GNUNET_OK;
}
/**
- * Function to process all messages received from the service
+ * Process a local tunnel info reply, pass info to the user.
*
- * @param cls closure
- * @param msg message received, NULL on timeout or fatal error
+ * @param cls Closure (Cadet handle).
+ * @param msg Message itself.
*/
static void
-msg_received (void *cls, const struct GNUNET_MessageHeader *msg)
+handle_get_tunnel (void *cls,
+ const struct GNUNET_CADET_LocalInfoTunnel *msg)
{
struct GNUNET_CADET_Handle *h = cls;
- uint16_t type;
+ unsigned int ch_n;
+ unsigned int c_n;
+ const struct GNUNET_CADET_ConnectionTunnelIdentifier *conns;
+ const struct GNUNET_CADET_ChannelTunnelNumber *chns;
- if (msg == NULL)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Cadet service disconnected, reconnecting\n", h);
- reconnect (h);
+ if (NULL == h->info_cb.tunnel_cb)
return;
- }
- type = ntohs (msg->type);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Received a message: %s\n",
- GC_m2s (type));
- switch (type)
- {
- /* Notify of a new incoming channel */
- case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_CREATE:
- process_channel_created (h, (struct GNUNET_CADET_ChannelMessage *) msg);
- break;
- /* Notify of a channel disconnection */
- case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY: /* TODO separate(gid problem)*/
- case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_NACK:
- process_channel_destroy (h, (struct GNUNET_CADET_ChannelMessage *) msg);
- break;
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA:
- process_incoming_data (h, msg);
- break;
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK:
- process_ack (h, msg);
- break;
-// case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNELS:
-// process_get_channels (h, msg);
-// break;
-// case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL:
-// process_show_channel (h, msg);
-// break;
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS:
- process_get_peers (h, msg);
- break;
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER:
- process_get_peer (h, msg);
- break;
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS:
- process_get_tunnels (h, msg);
- break;
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL:
- process_get_tunnel (h, msg);
- break;
-// case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL:
-// process_show_channel (h, msg);
-// break;
- default:
- /* We shouldn't get any other packages, log and ignore */
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "unsolicited message form service (type %s)\n",
- GC_m2s (ntohs (msg->type)));
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "message processed\n");
- if (GNUNET_YES == h->in_receive)
- {
- GNUNET_CLIENT_receive (h->client, &msg_received, h,
- GNUNET_TIME_UNIT_FOREVER_REL);
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "in receive off, not calling CLIENT_receive\n");
- }
-}
+ ch_n = ntohl (msg->channels);
+ c_n = ntohl (msg->connections);
+
+ /* Call Callback with tunnel info. */
+ conns = (const struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
+ chns = (const struct GNUNET_CADET_ChannelTunnelNumber *) &conns[c_n];
+ h->info_cb.tunnel_cb (h->info_cls,
+ &msg->destination,
+ ch_n,
+ c_n,
+ chns,
+ conns,
+ ntohs (msg->estate),
+ ntohs (msg->cstate));
+}
-/******************************************************************************/
-/************************ SEND FUNCTIONS ****************************/
-/******************************************************************************/
/**
- * Function called to send a message to the service.
- * "buf" will be NULL and "size" zero if the socket was closed for writing in
- * the meantime.
+ * Reconnect to the service, retransmit all infomation to try to restore the
+ * original state.
*
- * @param cls closure, the cadet handle
- * @param size number of bytes available in buf
- * @param buf where the callee should write the connect message
- * @return number of bytes written to buf
+ * @param h handle to the cadet
*/
-static size_t
-send_callback (void *cls, size_t size, void *buf)
+static void
+reconnect (struct GNUNET_CADET_Handle *h)
{
- struct GNUNET_CADET_Handle *h = cls;
- struct GNUNET_CADET_TransmitHandle *th;
- struct GNUNET_CADET_TransmitHandle *next;
- struct GNUNET_CADET_Channel *ch;
- char *cbuf = buf;
- size_t tsize;
- size_t psize;
- size_t nsize;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() Buffer %u\n", size);
- if ((0 == size) || (NULL == buf))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# Received NULL send callback on %p\n", h);
- reconnect (h);
- h->th = NULL;
- return 0;
- }
- tsize = 0;
- next = h->th_head;
- nsize = message_ready_size (h);
- while ((NULL != (th = next)) && (0 < nsize) && (size >= nsize))
- {
- ch = th->channel;
- if (GNUNET_YES == th_is_payload (th))
- {
- struct GNUNET_CADET_LocalData *dmsg;
- struct GNUNET_MessageHeader *mh;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload\n");
- if (GNUNET_NO == ch->allow_send)
- {
- /* This channel is not ready to transmit yet, try next message */
- next = th->next;
- continue;
- }
- ch->packet_size = 0;
- GNUNET_assert (size >= th->size);
- dmsg = (struct GNUNET_CADET_LocalData *) cbuf;
- mh = (struct GNUNET_MessageHeader *) &dmsg[1];
- psize = th->notify (th->notify_cls,
- size - sizeof (struct GNUNET_CADET_LocalData),
- mh);
-
- if (psize > 0)
- {
- psize += sizeof (struct GNUNET_CADET_LocalData);
- GNUNET_assert (size >= psize);
- dmsg->header.size = htons (psize);
- dmsg->id = htonl (ch->chid);
- dmsg->header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload type %s\n",
- GC_m2s (ntohs (mh->type)));
- ch->allow_send = GNUNET_NO;
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "# callback returned size 0, "
- "application canceled transmission\n");
- }
- }
- else
- {
- struct GNUNET_MessageHeader *mh = (struct GNUNET_MessageHeader *) &th[1];
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# cadet internal traffic, type %s\n",
- GC_m2s (ntohs (mh->type)));
- memcpy (cbuf, &th[1], th->size);
- psize = th->size;
- }
- GNUNET_assert (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE >= psize);
-
- if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel (th->timeout_task);
- GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
- GNUNET_free (th);
- next = h->th_head;
- nsize = message_ready_size (h);
- cbuf += psize;
- size -= psize;
- tsize += psize;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# total size: %u\n", tsize);
- h->th = NULL;
- size = message_ready_size (h);
- if (0 != size)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# next size: %u\n", size);
- h->th =
- GNUNET_CLIENT_notify_transmit_ready (h->client, size,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES, &send_callback, h);
- }
- else
- {
- if (NULL != h->th_head)
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# can't transmit any more\n");
- else
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# nothing left to transmit\n");
- }
- if (GNUNET_NO == h->in_receive)
+ struct GNUNET_MQ_MessageHandler handlers[] = {
+ GNUNET_MQ_hd_fixed_size (channel_created,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
+ struct GNUNET_CADET_LocalChannelCreateMessage,
+ h),
+ GNUNET_MQ_hd_fixed_size (channel_destroy,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
+ struct GNUNET_CADET_LocalChannelDestroyMessage,
+ h),
+ GNUNET_MQ_hd_var_size (local_data,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
+ struct GNUNET_CADET_LocalData,
+ h),
+ GNUNET_MQ_hd_fixed_size (local_ack,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
+ struct GNUNET_CADET_LocalAck,
+ h),
+ GNUNET_MQ_hd_fixed_size (get_peers,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
+ struct GNUNET_CADET_LocalInfoPeer,
+ h),
+ GNUNET_MQ_hd_var_size (get_peer,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
+ struct GNUNET_CADET_LocalInfoPeer,
+ h),
+ GNUNET_MQ_hd_fixed_size (get_tunnels,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
+ struct GNUNET_CADET_LocalInfoTunnel,
+ h),
+ GNUNET_MQ_hd_var_size (get_tunnel,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
+ struct GNUNET_CADET_LocalInfoTunnel,
+ h),
+ GNUNET_MQ_handler_end ()
+ };
+
+ h->mq = GNUNET_CLIENT_connect (h->cfg,
+ "cadet",
+ handlers,
+ &handle_mq_error,
+ h);
+ if (NULL == h->mq)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# start receiving from service\n");
- h->in_receive = GNUNET_YES;
- GNUNET_CLIENT_receive (h->client, &msg_received, h,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ schedule_reconnect (h);
+ return;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() END\n");
- return tsize;
+ h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
}
/**
- * Auxiliary function to send an already constructed packet to the service.
- * Takes care of creating a new queue element, copying the message and
- * calling the tmt_rdy function if necessary.
+ * Function called during #GNUNET_CADET_disconnect() to destroy
+ * all channels that are still open.
*
- * @param h cadet handle
- * @param msg message to transmit
- * @param channel channel this send is related to (NULL if N/A)
+ * @param cls the `struct GNUNET_CADET_Handle`
+ * @param cid chanenl ID
+ * @param value a `struct GNUNET_CADET_Channel` to destroy
+ * @return #GNUNET_OK (continue to iterate)
*/
-static void
-send_packet (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_MessageHeader *msg,
- struct GNUNET_CADET_Channel *channel)
-{
- struct GNUNET_CADET_TransmitHandle *th;
- size_t msize;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, " Sending message to service: %s\n",
- GC_m2s(ntohs(msg->type)));
- msize = ntohs (msg->size);
- th = GNUNET_malloc (sizeof (struct GNUNET_CADET_TransmitHandle) + msize);
- th->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
- th->size = msize;
- th->channel = channel;
- memcpy (&th[1], msg, msize);
- add_to_queue (h, th);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " queued\n");
- if (NULL != h->th)
- return;
- LOG (GNUNET_ERROR_TYPE_DEBUG, " calling ntfy tmt rdy for %u bytes\n", msize);
- h->th =
- GNUNET_CLIENT_notify_transmit_ready (h->client, msize,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES, &send_callback, h);
-}
-
-
-/******************************************************************************/
-/********************** API CALL DEFINITIONS *************************/
-/******************************************************************************/
-
-struct GNUNET_CADET_Handle *
-GNUNET_CADET_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls,
- GNUNET_CADET_InboundChannelNotificationHandler new_channel,
- GNUNET_CADET_ChannelEndHandler cleaner,
- const struct GNUNET_CADET_MessageHandler *handlers,
- const uint32_t *ports)
+static int
+destroy_channel_cb (void *cls,
+ uint32_t cid,
+ void *value)
{
- struct GNUNET_CADET_Handle *h;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_CADET_connect()\n");
- h = GNUNET_new (struct GNUNET_CADET_Handle);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " addr %p\n", h);
- h->cfg = cfg;
- h->new_channel = new_channel;
- h->cleaner = cleaner;
- h->client = GNUNET_CLIENT_connect ("cadet", cfg);
- if (h->client == NULL)
- {
- GNUNET_break (0);
- GNUNET_free (h);
- return NULL;
- }
- h->cls = cls;
- h->message_handlers = handlers;
- h->ports = ports;
- h->next_chid = GNUNET_CADET_LOCAL_CHANNEL_ID_CLI;
- h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ /* struct GNUNET_CADET_Handle *handle = cls; */
+ struct GNUNET_CADET_Channel *ch = value;
- if (NULL != ports && ports[0] != 0 && NULL == new_channel)
- {
- GNUNET_break (0);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "no new channel handler given, ports parameter is useless!!\n");
- }
- if ((NULL == ports || ports[0] == 0) && NULL != new_channel)
+ if (ntohl (ch->ccn.channel_of_client) >= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
{
GNUNET_break (0);
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "no ports given, new channel handler will never be called!!\n");
+ "channel %X not destroyed\n",
+ ntohl (ch->ccn.channel_of_client));
}
- /* count handlers */
- for (h->n_handlers = 0;
- handlers && handlers[h->n_handlers].type;
- h->n_handlers++) ;
- for (h->n_ports = 0;
- ports && ports[h->n_ports];
- h->n_ports++) ;
- send_connect (h);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_CADET_connect() END\n");
- return h;
+ destroy_channel (ch);
+ return GNUNET_OK;
}
-void
-GNUNET_CADET_disconnect (struct GNUNET_CADET_Handle *handle)
+/**
+ * Function called during #GNUNET_CADET_disconnect() to destroy
+ * all ports that are still open.
+ *
+ * @param cls the `struct GNUNET_CADET_Handle`
+ * @param id port ID
+ * @param value a `struct GNUNET_CADET_Channel` to destroy
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+destroy_port_cb (void *cls,
+ const struct GNUNET_HashCode *id,
+ void *value)
{
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_Channel *aux;
- struct GNUNET_CADET_TransmitHandle *th;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "CADET DISCONNECT\n");
-
- ch = handle->channels_head;
- while (NULL != ch)
- {
- aux = ch->next;
- if (ch->chid < GNUNET_CADET_LOCAL_CHANNEL_ID_SERV)
- {
- GNUNET_break (0);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "channel %X not destroyed\n", ch->chid);
- }
- destroy_channel (ch, GNUNET_YES);
- ch = aux;
- }
- while ( (th = handle->th_head) != NULL)
- {
- struct GNUNET_MessageHeader *msg;
+ /* struct GNUNET_CADET_Handle *handle = cls; */
+ struct GNUNET_CADET_Port *port = value;
- /* Make sure it is an allowed packet (everything else should have been
- * already canceled).
- */
- GNUNET_break (GNUNET_NO == th_is_payload (th));
- msg = (struct GNUNET_MessageHeader *) &th[1];
- switch (ntohs(msg->type))
- {
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_CONNECT:
- case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_CREATE:
- case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNELS:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS:
- break;
- default:
- GNUNET_break (0);
- LOG (GNUNET_ERROR_TYPE_ERROR, "unexpected msg %u\n",
- ntohs(msg->type));
- }
+ /* This is a warning, the app should have cleanly closed all open ports */
+ GNUNET_break (0);
+ GNUNET_CADET_close_port (port);
+ return GNUNET_OK;
+}
- GNUNET_CONTAINER_DLL_remove (handle->th_head, handle->th_tail, th);
- GNUNET_free (th);
- }
- if (NULL != handle->th)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (handle->th);
- handle->th = NULL;
- }
- if (NULL != handle->client)
+/**
+ * Disconnect from the cadet service. All channels will be destroyed. All channel
+ * disconnect callbacks will be called on any still connected peers, notifying
+ * about their disconnection. The registered inbound channel cleaner will be
+ * called should any inbound channels still exist.
+ *
+ * @param handle connection to cadet to disconnect
+ */
+void
+GNUNET_CADET_disconnect (struct GNUNET_CADET_Handle *handle)
+{
+ GNUNET_CONTAINER_multihashmap_iterate (handle->ports,
+ &destroy_port_cb,
+ handle);
+ GNUNET_CONTAINER_multihashmap_destroy (handle->ports);
+ handle->ports = NULL;
+ GNUNET_CONTAINER_multihashmap32_iterate (handle->channels,
+ &destroy_channel_cb,
+ handle);
+ GNUNET_CONTAINER_multihashmap32_destroy (handle->channels);
+ handle->channels = NULL;
+ if (NULL != handle->mq)
{
- GNUNET_CLIENT_disconnect (handle->client);
- handle->client = NULL;
+ GNUNET_MQ_destroy (handle->mq);
+ handle->mq = NULL;
}
- if (GNUNET_SCHEDULER_NO_TASK != handle->reconnect_task)
+ if (NULL != handle->reconnect_task)
{
- GNUNET_SCHEDULER_cancel(handle->reconnect_task);
- handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ GNUNET_SCHEDULER_cancel (handle->reconnect_task);
+ handle->reconnect_task = NULL;
}
GNUNET_free (handle);
}
/**
- * Create a new channel towards a remote peer.
+ * Close a port opened with @a GNUNET_CADET_open_port().
+ * The @a new_channel callback will no longer be called.
*
- * If the destination port is not open by any peer or the destination peer
- * does not accept the channel, #GNUNET_CADET_ChannelEndHandler will be called
- * for this channel.
- *
- * @param h cadet handle
- * @param channel_ctx client's channel context to associate with the channel
- * @param peer peer identity the channel should go to
- * @param port Port number.
- * @param options CadetOption flag field, with all desired option bits set to 1.
- *
- * @return handle to the channel
+ * @param p Port handle.
*/
-struct GNUNET_CADET_Channel *
-GNUNET_CADET_channel_create (struct GNUNET_CADET_Handle *h,
- void *channel_ctx,
- const struct GNUNET_PeerIdentity *peer,
- uint32_t port,
- enum GNUNET_CADET_ChannelOption options)
+void
+GNUNET_CADET_close_port (struct GNUNET_CADET_Port *p)
{
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_ChannelMessage msg;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Creating new channel to %s:%u\n",
- GNUNET_i2s (peer), port);
- ch = create_channel (h, 0);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " at %p\n", ch);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " number %X\n", ch->chid);
- ch->ctx = channel_ctx;
- ch->peer = GNUNET_PEER_intern (peer);
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_CHANNEL_CREATE);
- msg.header.size = htons (sizeof (struct GNUNET_CADET_ChannelMessage));
- msg.channel_id = htonl (ch->chid);
- msg.port = htonl (port);
- msg.peer = *peer;
- msg.opt = htonl (options);
- ch->allow_send = GNUNET_NO;
- send_packet (h, &msg.header, ch);
- return ch;
+ struct GNUNET_CADET_PortMessage *msg;
+ struct GNUNET_MQ_Envelope *env;
+
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE);
+ msg->port = p->id;
+ GNUNET_MQ_send (p->cadet->mq,
+ env);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (p->cadet->ports,
+ &p->id,
+ p));
+ GNUNET_free_non_null (p->handlers);
+ GNUNET_free (p);
}
+/**
+ * Destroy an existing channel.
+ *
+ * The existing end callback for the channel will be called immediately.
+ * Any pending outgoing messages will be sent but no incoming messages will be
+ * accepted and no data callbacks will be called.
+ *
+ * @param channel Channel handle, becomes invalid after this call.
+ */
void
GNUNET_CADET_channel_destroy (struct GNUNET_CADET_Channel *channel)
{
- struct GNUNET_CADET_Handle *h;
- struct GNUNET_CADET_ChannelMessage msg;
- struct GNUNET_CADET_TransmitHandle *th;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Destroying channel\n");
- h = channel->cadet;
-
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY);
- msg.header.size = htons (sizeof (struct GNUNET_CADET_ChannelMessage));
- msg.channel_id = htonl (channel->chid);
- memset (&msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
- msg.port = 0;
- msg.opt = 0;
- th = h->th_head;
- while (th != NULL)
+ struct GNUNET_CADET_Handle *h = channel->cadet;
+ struct GNUNET_CADET_LocalChannelDestroyMessage *msg;
+ struct GNUNET_MQ_Envelope *env;
+
+ if (NULL != h->mq)
{
- struct GNUNET_CADET_TransmitHandle *aux;
- if (th->channel == channel)
- {
- aux = th->next;
- /* FIXME call the handler? */
- if (GNUNET_YES == th_is_payload (th))
- th->notify (th->notify_cls, 0, NULL);
- GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
- GNUNET_free (th);
- th = aux;
- }
- else
- th = th->next;
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
+ msg->ccn = channel->ccn;
+ GNUNET_MQ_send (h->mq,
+ env);
}
-
- destroy_channel (channel, GNUNET_YES);
- send_packet (h, &msg.header, NULL);
+ destroy_channel (channel);
}
*/
const union GNUNET_CADET_ChannelInfo *
GNUNET_CADET_channel_get_info (struct GNUNET_CADET_Channel *channel,
- enum GNUNET_CADET_ChannelOption option, ...)
+ enum GNUNET_CADET_ChannelOption option,
+ ...)
{
static int bool_flag;
- const union GNUNET_CADET_ChannelInfo *ret;
switch (option)
{
case GNUNET_CADET_OPTION_NOBUFFER:
case GNUNET_CADET_OPTION_RELIABLE:
- case GNUNET_CADET_OPTION_OOORDER:
+ case GNUNET_CADET_OPTION_OUT_OF_ORDER:
if (0 != (option & channel->options))
bool_flag = GNUNET_YES;
else
bool_flag = GNUNET_NO;
- ret = (const union GNUNET_CADET_ChannelInfo *) &bool_flag;
+ return (const union GNUNET_CADET_ChannelInfo *) &bool_flag;
break;
case GNUNET_CADET_OPTION_PEER:
- ret = (const union GNUNET_CADET_ChannelInfo *) GNUNET_PEER_resolve2 (channel->peer);
+ return (const union GNUNET_CADET_ChannelInfo *) &channel->peer;
break;
default:
GNUNET_break (0);
return NULL;
}
-
- return ret;
-}
-
-struct GNUNET_CADET_TransmitHandle *
-GNUNET_CADET_notify_transmit_ready (struct GNUNET_CADET_Channel *channel, int cork,
- struct GNUNET_TIME_Relative maxdelay,
- size_t notify_size,
- GNUNET_CONNECTION_TransmitReadyNotify notify,
- void *notify_cls)
-{
- struct GNUNET_CADET_TransmitHandle *th;
-
- GNUNET_assert (NULL != channel);
- GNUNET_assert (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE >= notify_size);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "CADET NOTIFY TRANSMIT READY\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", channel->chid);
- LOG (GNUNET_ERROR_TYPE_DEBUG, " allow_send %d\n", channel->allow_send);
- if (channel->chid >= GNUNET_CADET_LOCAL_CHANNEL_ID_SERV)
- LOG (GNUNET_ERROR_TYPE_DEBUG, " to origin\n");
- else
- LOG (GNUNET_ERROR_TYPE_DEBUG, " to destination\n");
- LOG (GNUNET_ERROR_TYPE_DEBUG, " payload size %u\n", notify_size);
- GNUNET_assert (NULL != notify);
- GNUNET_assert (0 == channel->packet_size); // Only one data packet allowed
- th = GNUNET_new (struct GNUNET_CADET_TransmitHandle);
- th->channel = channel;
- th->timeout = GNUNET_TIME_relative_to_absolute (maxdelay);
- th->size = notify_size + sizeof (struct GNUNET_CADET_LocalData);
- channel->packet_size = th->size;
- LOG (GNUNET_ERROR_TYPE_DEBUG, " total size %u\n", th->size);
- th->notify = notify;
- th->notify_cls = notify_cls;
- add_to_queue (channel->cadet, th);
- if (NULL != channel->cadet->th)
- return th;
- if (GNUNET_NO == channel->allow_send)
- return th;
- LOG (GNUNET_ERROR_TYPE_DEBUG, " call client notify tmt rdy\n");
- channel->cadet->th =
- GNUNET_CLIENT_notify_transmit_ready (channel->cadet->client, th->size,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES, &send_callback,
- channel->cadet);
- LOG (GNUNET_ERROR_TYPE_DEBUG, "CADET NOTIFY TRANSMIT READY END\n");
- return th;
-}
-
-
-void
-GNUNET_CADET_notify_transmit_ready_cancel (struct GNUNET_CADET_TransmitHandle *th)
-{
- struct GNUNET_CADET_Handle *cadet;
-
- th->channel->packet_size = 0;
- cadet = th->channel->cadet;
- if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel (th->timeout_task);
- GNUNET_CONTAINER_DLL_remove (cadet->th_head, cadet->th_tail, th);
- GNUNET_free (th);
- if ((0 == message_ready_size (cadet)) && (NULL != cadet->th))
- {
- /* queue empty, no point in asking for transmission */
- GNUNET_CLIENT_notify_transmit_ready_cancel (cadet->th);
- cadet->th = NULL;
- }
}
+/**
+ * Send an ack on the channel to confirm the processing of a message.
+ *
+ * @param ch Channel on which to send the ACK.
+ */
void
GNUNET_CADET_receive_done (struct GNUNET_CADET_Channel *channel)
{
- send_ack (channel);
+ struct GNUNET_CADET_LocalAck *msg;
+ struct GNUNET_MQ_Envelope *env;
+
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending ACK on channel %X\n",
+ ntohl (channel->ccn.channel_of_client));
+ msg->ccn = channel->ccn;
+ GNUNET_MQ_send (channel->cadet->mq,
+ env);
}
+/**
+ * Send message of @a type to CADET service of @a h
+ *
+ * @param h handle to CADET service
+ * @param type message type of trivial information request to send
+ */
static void
-send_info_request (struct GNUNET_CADET_Handle *h, uint16_t type)
+send_info_request (struct GNUNET_CADET_Handle *h,
+ uint16_t type)
{
- struct GNUNET_MessageHeader msg;
+ struct GNUNET_MessageHeader *msg;
+ struct GNUNET_MQ_Envelope *env;
- msg.size = htons (sizeof (msg));
- msg.type = htons (type);
- send_packet (h, &msg, NULL);
+ env = GNUNET_MQ_msg (msg,
+ type);
+ GNUNET_MQ_send (h->mq,
+ env);
}
void
GNUNET_CADET_request_dump (struct GNUNET_CADET_Handle *h)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG, "requesting dump\n");
- send_info_request (h, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP);
+ send_info_request (h,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP);
}
* The callback will be called for every peer known to the service.
* Only one info request (of any kind) can be active at once.
*
- *
* WARNING: unstable API, likely to change in the future!
*
* @param h Handle to the cadet peer.
* @param callback Function to call with the requested data.
* @param callback_cls Closure for @c callback.
- *
* @return #GNUNET_OK / #GNUNET_SYSERR
*/
int
GNUNET_break (0);
return GNUNET_SYSERR;
}
- send_info_request (h, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
+ send_info_request (h,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
h->info_cb.peers_cb = callback;
h->info_cls = callback_cls;
return GNUNET_OK;
* WARNING: unstable API, likely to change in the future!
*
* @param h Cadet handle.
- *
- * @return Closure given to GNUNET_CADET_get_peers.
+ * @return Closure given to GNUNET_CADET_get_peers().
*/
void *
GNUNET_CADET_get_peers_cancel (struct GNUNET_CADET_Handle *h)
{
- void *cls;
+ void *cls = h->info_cls;
- cls = h->info_cls;
h->info_cb.peers_cb = NULL;
h->info_cls = NULL;
return cls;
* @param id Peer whose tunnel to examine.
* @param callback Function to call with the requested data.
* @param callback_cls Closure for @c callback.
- *
* @return #GNUNET_OK / #GNUNET_SYSERR
*/
int
GNUNET_CADET_get_peer (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_PeerIdentity *id,
- GNUNET_CADET_PeerCB callback,
- void *callback_cls)
+ const struct GNUNET_PeerIdentity *id,
+ GNUNET_CADET_PeerCB callback,
+ void *callback_cls)
{
- struct GNUNET_CADET_LocalInfo msg;
+ struct GNUNET_CADET_LocalInfo *msg;
+ struct GNUNET_MQ_Envelope *env;
if (NULL != h->info_cb.peer_cb)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
-
- memset (&msg, 0, sizeof (msg));
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
- msg.peer = *id;
- send_packet (h, &msg.header, NULL);
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
+ msg->peer = *id;
+ GNUNET_MQ_send (h->mq,
+ env);
h->info_cb.peer_cb = callback;
h->info_cls = callback_cls;
return GNUNET_OK;
* @param h Handle to the cadet peer.
* @param callback Function to call with the requested data.
* @param callback_cls Closure for @c callback.
- *
* @return #GNUNET_OK / #GNUNET_SYSERR
*/
int
GNUNET_break (0);
return GNUNET_SYSERR;
}
- send_info_request (h, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
+ send_info_request (h,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
h->info_cb.tunnels_cb = callback;
h->info_cls = callback_cls;
return GNUNET_OK;
* Cancel a monitor request. The monitor callback will not be called.
*
* @param h Cadet handle.
- *
- * @return Closure given to GNUNET_CADET_get_tunnels.
+ * @return Closure given to GNUNET_CADET_get_tunnels().
*/
void *
GNUNET_CADET_get_tunnels_cancel (struct GNUNET_CADET_Handle *h)
{
- void *cls;
+ void *cls = h->info_cls;
h->info_cb.tunnels_cb = NULL;
- cls = h->info_cls;
h->info_cls = NULL;
-
return cls;
}
-
/**
* Request information about a tunnel of the running cadet peer.
* The callback will be called for the tunnel once.
* @param id Peer whose tunnel to examine.
* @param callback Function to call with the requested data.
* @param callback_cls Closure for @c callback.
- *
* @return #GNUNET_OK / #GNUNET_SYSERR
*/
int
GNUNET_CADET_TunnelCB callback,
void *callback_cls)
{
- struct GNUNET_CADET_LocalInfo msg;
+ struct GNUNET_CADET_LocalInfo *msg;
+ struct GNUNET_MQ_Envelope *env;
if (NULL != h->info_cb.tunnel_cb)
{
GNUNET_break (0);
return GNUNET_SYSERR;
}
-
- memset (&msg, 0, sizeof (msg));
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
- msg.peer = *id;
- send_packet (h, &msg.header, NULL);
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
+ msg->peer = *id;
+ GNUNET_MQ_send (h->mq,
+ env);
h->info_cb.tunnel_cb = callback;
h->info_cls = callback_cls;
return GNUNET_OK;
/**
- * Request information about a specific channel of the running cadet peer.
- *
- * WARNING: unstable API, likely to change in the future!
- * FIXME Add destination option.
+ * Transitional function to convert an unsigned int port to a hash value.
+ * WARNING: local static value returned, NOT reentrant!
+ * WARNING: do not use this function for new code!
*
- * @param h Handle to the cadet peer.
- * @param initiator ID of the owner of the channel.
- * @param channel_number Channel number.
- * @param callback Function to call with the requested data.
- * @param callback_cls Closure for @c callback.
+ * @param port Numerical port (unsigned int format).
*
- * @return #GNUNET_OK / #GNUNET_SYSERR
+ * @return A GNUNET_HashCode usable for the new CADET API.
*/
-int
-GNUNET_CADET_show_channel (struct GNUNET_CADET_Handle *h,
- struct GNUNET_PeerIdentity *initiator,
- unsigned int channel_number,
- GNUNET_CADET_ChannelCB callback,
- void *callback_cls)
+const struct GNUNET_HashCode *
+GC_u2h (uint32_t port)
{
- struct GNUNET_CADET_LocalInfo msg;
-
- if (NULL != h->info_cb.channel_cb)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- msg.header.size = htons (sizeof (msg));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL);
- msg.peer = *initiator;
- msg.channel_id = htonl (channel_number);
-// msg.reserved = 0;
- send_packet (h, &msg.header, NULL);
- h->info_cb.channel_cb = callback;
- h->info_cls = callback_cls;
- return GNUNET_OK;
+ static struct GNUNET_HashCode hash;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "This is a transitional function, use proper crypto hashes as CADET ports\n");
+ GNUNET_CRYPTO_hash (&port,
+ sizeof (port),
+ &hash);
+ return &hash;
}
/**
- * Function called to notify a client about the connection
- * begin ready to queue more data. "buf" will be
- * NULL and "size" zero if the connection was closed for
- * writing in the meantime.
+ * Connect to the MQ-based cadet service.
*
- * @param cls closure
- * @param size number of bytes available in buf
- * @param buf where the callee should write the message
- * @return number of bytes written to buf
+ * @param cfg Configuration to use.
+ *
+ * @return Handle to the cadet service NULL on error.
*/
-static size_t
-cadet_mq_ntr (void *cls, size_t size,
- void *buf)
+struct GNUNET_CADET_Handle *
+GNUNET_CADET_connect (const struct GNUNET_CONFIGURATION_Handle *cfg)
{
- struct GNUNET_MQ_Handle *mq = cls;
- struct CadetMQState *state = GNUNET_MQ_impl_state (mq);
- const struct GNUNET_MessageHeader *msg = GNUNET_MQ_impl_current (mq);
- uint16_t msize;
+ struct GNUNET_CADET_Handle *h;
- state->th = NULL;
- if (NULL == buf)
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "GNUNET_CADET_connect()\n");
+ h = GNUNET_new (struct GNUNET_CADET_Handle);
+ h->cfg = cfg;
+ h->ports = GNUNET_CONTAINER_multihashmap_create (4,
+ GNUNET_YES);
+ h->channels = GNUNET_CONTAINER_multihashmap32_create (4);
+ reconnect (h);
+ if (NULL == h->mq)
{
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_WRITE);
- return 0;
+ GNUNET_break (0);
+ GNUNET_CADET_disconnect (h);
+ return NULL;
}
- msize = ntohs (msg->size);
- GNUNET_assert (msize <= size);
- memcpy (buf, msg, msize);
- GNUNET_MQ_impl_send_continue (mq);
- return msize;
+ h->next_ccn.channel_of_client = htonl (GNUNET_CADET_LOCAL_CHANNEL_ID_CLI);
+ h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
+ h->reconnect_task = NULL;
+
+ return h;
}
/**
- * Signature of functions implementing the
- * sending functionality of a message queue.
- *
- * @param mq the message queue
- * @param msg the message to send
- * @param impl_state state of the implementation
+ * Open a port to receive incomming MQ-based channels.
+ *
+ * @param h CADET handle.
+ * @param port Hash identifying the port.
+ * @param connects Function called when an incoming channel is connected.
+ * @param connects_cls Closure for the @a connects handler.
+ * @param window_changes Function called when the transmit window size changes.
+ * @param disconnects Function called when a channel is disconnected.
+ * @param handlers Callbacks for messages we care about, NULL-terminated.
+ * @return Port handle.
*/
-static void
-cadet_mq_send_impl (struct GNUNET_MQ_Handle *mq,
- const struct GNUNET_MessageHeader *msg,
- void *impl_state)
+struct GNUNET_CADET_Port *
+GNUNET_CADET_open_port (struct GNUNET_CADET_Handle *h,
+ const struct GNUNET_HashCode *port,
+ GNUNET_CADET_ConnectEventHandler connects,
+ void * connects_cls,
+ GNUNET_CADET_WindowSizeEventHandler window_changes,
+ GNUNET_CADET_DisconnectEventHandler disconnects,
+ const struct GNUNET_MQ_MessageHandler *handlers)
{
- struct CadetMQState *state = impl_state;
-
- GNUNET_assert (NULL == state->th);
- state->th =
- GNUNET_CADET_notify_transmit_ready (state->channel,
- /* FIXME: add option for corking */
- GNUNET_NO,
- GNUNET_TIME_UNIT_FOREVER_REL,
- ntohs (msg->size),
- &cadet_mq_ntr, mq);
-
+ struct GNUNET_CADET_PortMessage *msg;
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_CADET_Port *p;
+
+ GNUNET_assert (NULL != connects);
+ GNUNET_assert (NULL != disconnects);
+
+ p = GNUNET_new (struct GNUNET_CADET_Port);
+ p->cadet = h;
+ p->id = *port;
+ p->connects = connects;
+ p->cls = connects_cls;
+ p->window_changes = window_changes;
+ p->disconnects = disconnects;
+ p->handlers = GNUNET_MQ_copy_handlers (handlers);
+
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_put (h->ports,
+ &p->id,
+ p,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN);
+ msg->port = p->id;
+ GNUNET_MQ_send (h->mq,
+ env);
+ return p;
}
/**
- * Signature of functions implementing the
- * destruction of a message queue.
- * Implementations must not free 'mq', but should
- * take care of 'impl_state'.
+ * Create a new channel towards a remote peer.
*
- * @param mq the message queue to destroy
- * @param impl_state state of the implementation
+ * If the destination port is not open by any peer or the destination peer
+ * does not accept the channel, #GNUNET_CADET_ChannelEndHandler will be called
+ * for this channel.
+ *
+ * @param h CADET handle.
+ * @param channel_cls Closure for the channel. It's given to:
+ * - The disconnect handler @a disconnects
+ * - Each message type callback in @a handlers
+ * @param destination Peer identity the channel should go to.
+ * @param port Identification of the destination port.
+ * @param options CadetOption flag field, with all desired option bits set to 1.
+ * @param window_changes Function called when the transmit window size changes.
+ * @param disconnects Function called when the channel is disconnected.
+ * @param handlers Callbacks for messages we care about, NULL-terminated.
+ * @return Handle to the channel.
*/
-static void
-cadet_mq_destroy_impl (struct GNUNET_MQ_Handle *mq,
- void *impl_state)
+struct GNUNET_CADET_Channel *
+GNUNET_CADET_channel_create (struct GNUNET_CADET_Handle *h,
+ void *channel_cls,
+ const struct GNUNET_PeerIdentity *destination,
+ const struct GNUNET_HashCode *port,
+ enum GNUNET_CADET_ChannelOption options,
+ GNUNET_CADET_WindowSizeEventHandler window_changes,
+ GNUNET_CADET_DisconnectEventHandler disconnects,
+ const struct GNUNET_MQ_MessageHandler *handlers)
{
- struct CadetMQState *state = impl_state;
-
- if (NULL != state->th)
- GNUNET_CADET_notify_transmit_ready_cancel (state->th);
-
- GNUNET_free (state);
+ struct GNUNET_CADET_Channel *ch;
+ struct GNUNET_CADET_LocalChannelCreateMessage *msg;
+ struct GNUNET_MQ_Envelope *env;
+
+ GNUNET_assert (NULL != disconnects);
+ ch = create_channel (h,
+ NULL);
+ ch->ctx = channel_cls;
+ ch->peer = *destination;
+ ch->options = options;
+ ch->window_changes = window_changes;
+ ch->disconnects = disconnects;
+
+ /* Create MQ for channel */
+ ch->mq = GNUNET_MQ_queue_for_callbacks (&cadet_mq_send_impl,
+ &cadet_mq_destroy_impl,
+ &cadet_mq_cancel_impl,
+ ch,
+ handlers,
+ &cadet_mq_error_handler,
+ ch);
+ GNUNET_MQ_set_handlers_closure (ch->mq, channel_cls);
+
+ /* Request channel creation to service */
+ env = GNUNET_MQ_msg (msg,
+ GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE);
+ msg->ccn = ch->ccn;
+ msg->port = *port;
+ msg->peer = *destination;
+ msg->opt = htonl (options);
+ GNUNET_MQ_send (h->mq,
+ env);
+ return ch;
}
/**
- * Create a message queue for a cadet channel.
- * The message queue can only be used to transmit messages,
- * not to receive them.
+ * Obtain the message queue for a connected peer.
*
- * @param channel the channel to create the message qeue for
- * @return a message queue to messages over the channel
+ * @param channel The channel handle from which to get the MQ.
+ *
+ * @return NULL if @a channel is not yet connected.
*/
struct GNUNET_MQ_Handle *
-GNUNET_CADET_mq_create (struct GNUNET_CADET_Channel *channel)
+GNUNET_CADET_get_mq (const struct GNUNET_CADET_Channel *channel)
{
- struct GNUNET_MQ_Handle *mq;
- struct CadetMQState *state;
-
- state = GNUNET_new (struct CadetMQState);
- state->channel = channel;
-
- mq = GNUNET_MQ_queue_for_callbacks (&cadet_mq_send_impl,
- &cadet_mq_destroy_impl,
- NULL, /* FIXME: cancel impl. */
- state,
- NULL, /* no msg handlers */
- NULL, /* no err handlers */
- NULL); /* no handler cls */
- return mq;
+ return channel->mq;
}
+/* end of cadet_api.c */
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