+++ /dev/null
-/*
- This file is part of GNUnet.
- 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
-*/
-/**
- * @file cadet/cadet_api.c
- * @brief cadet api: client implementation of cadet service
- * @author Bartlomiej Polot
- */
-
-#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
- *
- * @deprecated
- */
-struct GNUNET_CADET_TransmitHandle
-{
- /**
- * 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;
-
- /**
- * Request data task.
- */
- struct GNUNET_SCHEDULER_Task *request_data_task;
-
- /**
- * 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;
-
- /**
- * Size of the payload.
- */
- size_t size;
-};
-
-
-union CadetInfoCB
-{
-
- /**
- * Channel callback.
- */
- GNUNET_CADET_ChannelCB channel_cb;
-
- /**
- * Monitor callback
- */
- GNUNET_CADET_PeersCB peers_cb;
-
- /**
- * Monitor callback
- */
- GNUNET_CADET_PeerCB peer_cb;
-
- /**
- * Monitor callback
- */
- GNUNET_CADET_TunnelsCB tunnels_cb;
-
- /**
- * Tunnel callback.
- */
- GNUNET_CADET_TunnelCB tunnel_cb;
-};
-
-
-/**
- * Opaque handle to the service.
- */
-struct GNUNET_CADET_Handle
-{
- /**
- * Flag to indicate old or MQ API.
- */
- int mq_api;
-
- /**
- * Message queue (if available).
- */
- struct GNUNET_MQ_Handle *mq;
-
- /**
- * Set of handlers used for processing incoming messages in the channels
- *
- * @deprecated
- */
- const struct GNUNET_CADET_MessageHandler *message_handlers;
-
- /**
- * Number of handlers in the handlers array.
- *
- * @deprecated
- */
- unsigned int n_handlers;
-
- /**
- * Ports open.
- */
- struct GNUNET_CONTAINER_MultiHashMap *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 disconnection
- */
- GNUNET_CADET_ChannelEndHandler *cleaner;
-
- /**
- * Closure for all the handlers given by the client
- *
- * @deprecated
- */
- void *cls;
-
- /**
- * Messages to send to the service, head.
- *
- * @deprecated
- */
- struct GNUNET_CADET_TransmitHandle *th_head;
-
- /**
- * Messages to send to the service, tail.
- *
- * @deprecated
- */
- struct GNUNET_CADET_TransmitHandle *th_tail;
-
- /**
- * child of the next channel to create (to avoid reusing IDs often)
- */
- struct GNUNET_CADET_ClientChannelNumber next_ccn;
-
- /**
- * Configuration given by the client, in case of reconnection
- */
- const struct GNUNET_CONFIGURATION_Handle *cfg;
-
- /**
- * Time to the next reconnect in case one reconnect fails
- */
- struct GNUNET_TIME_Relative reconnect_time;
-
- /**
- * Task for trying to reconnect.
- */
- struct GNUNET_SCHEDULER_Task * reconnect_task;
-
- /**
- * Callback for an info task (only one active at a time).
- */
- union CadetInfoCB info_cb;
-
- /**
- * 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
- */
- struct GNUNET_CADET_Channel *t;
-};
-
-
-/**
- * Opaque handle to a channel.
- */
-struct GNUNET_CADET_Channel
-{
- /**
- * DLL next
- */
- struct GNUNET_CADET_Channel *next;
-
- /**
- * DLL prev
- */
- struct GNUNET_CADET_Channel *prev;
-
- /**
- * Handle to the cadet this channel belongs to
- */
- struct GNUNET_CADET_Handle *cadet;
-
- /**
- * Local ID of the channel
- */
- struct GNUNET_CADET_ClientChannelNumber ccn;
-
- /**
- * Channel's port, if incoming.
- */
- struct GNUNET_CADET_Port *incoming_port;
-
- /**
- * Other end of the channel.
- */
- GNUNET_PEER_Id peer;
-
- /**
- * Any data the caller wants to put in here
- */
- void *ctx;
-
- /**
- * Channel options: reliability, etc.
- */
- enum GNUNET_CADET_ChannelOption options;
-
- /**
- * Are we allowed to send to the service?
- *
- * @deprecated?
- */
- unsigned int allow_send;
-
- /***************************** MQ ************************************/
- /**
- * Message Queue for the channel.
- */
- struct GNUNET_MQ_Handle *mq;
-
- /**
- * Task to allow mq to send more traffic.
- */
- struct GNUNET_SCHEDULER_Task *mq_cont;
-
- /**
- * Pending envelope in case we don't have an ACK from the service.
- */
- struct GNUNET_MQ_Envelope *pending_env;
-
- /**
- * Window change handler.
- */
- GNUNET_CADET_WindowSizeEventHandler window_changes;
-
- /**
- * Disconnect handler.
- */
- GNUNET_CADET_DisconnectEventHandler disconnects;
-
-};
-
-
-/**
- * Opaque handle to a port.
- */
-struct GNUNET_CADET_Port
-{
- /**
- * Handle to the CADET session this port belongs to.
- */
- struct GNUNET_CADET_Handle *cadet;
-
- /**
- * Port ID.
- *
- * @deprecated
- */
- struct GNUNET_HashCode *hash;
-
- /**
- * Callback handler for incoming channels on this port.
- */
- GNUNET_CADET_InboundChannelNotificationHandler *handler;
-
- /**
- * Closure for @a handler.
- */
- void *cls;
-
- /***************************** MQ ************************************/
-
- /**
- * Port "number"
- */
- struct GNUNET_HashCode id;
-
- /**
- * Handler for incoming channels on this port
- */
- GNUNET_CADET_ConnectEventHandler connects;
-
- /**
- * Closure for @ref connects
- */
- void * connects_cls;
-
- /**
- * Window size change handler.
- */
- GNUNET_CADET_WindowSizeEventHandler window_changes;
-
- /**
- * Handler called when an incoming channel is destroyed..
- */
- GNUNET_CADET_DisconnectEventHandler disconnects;
-
- /**
- * Payload handlers for incoming channels.
- */
- const struct GNUNET_MQ_MessageHandler *handlers;
-};
-
-
-/**
- * Implementation state for cadet's message queue.
- */
-struct CadetMQState
-{
- /**
- * The current transmit handle, or NULL
- * if no transmit is active.
- */
- struct GNUNET_CADET_TransmitHandle *th;
-
- /**
- * Channel to send the data over.
- */
- struct GNUNET_CADET_Channel *channel;
-};
-
-
-
-/******************************************************************************/
-/********************* FUNCTION DECLARATIONS *************************/
-/******************************************************************************/
-
-/**
- * Reconnect to the service, retransmit all infomation to try to restore the
- * original state.
- *
- * @param h Handle to the CADET service.
- */
-static void
-schedule_reconnect (struct GNUNET_CADET_Handle *h);
-
-
-/**
- * Reconnect callback: tries to reconnect again after a failer previous
- * reconnection.
- *
- * @param cls Closure (cadet handle).
- */
-static void
-reconnect_cbk (void *cls);
-
-
-/**
- * Reconnect to the service, retransmit all infomation to try to restore the
- * original state.
- *
- * @param h handle to the cadet
- */
-static void
-reconnect (struct GNUNET_CADET_Handle *h);
-
-
-/******************************************************************************/
-/*********************** AUXILIARY FUNCTIONS *************************/
-/******************************************************************************/
-
-/**
- * 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;
-}
-
-
-/**
- * Find the Port struct for a hash.
- *
- * @param h CADET handle.
- * @param hash HashCode for the port number.
- *
- * @return The port handle if known, NULL otherwise.
- */
-static struct GNUNET_CADET_Port *
-find_port (const struct GNUNET_CADET_Handle *h,
- const struct GNUNET_HashCode *hash)
-{
- struct GNUNET_CADET_Port *p;
-
- p = GNUNET_CONTAINER_multihashmap_get (h->ports, hash);
-
- return p;
-}
-
-
-/**
- * Get the channel handler for the channel specified by id from the given handle
- *
- * @param h Cadet handle
- * @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,
- struct GNUNET_CADET_ClientChannelNumber ccn)
-{
- struct GNUNET_CADET_Channel *ch;
-
- for (ch = h->channels_head; NULL != ch; ch = ch->next)
- if (ch->ccn.channel_of_client == ccn.channel_of_client)
- return ch;
- return NULL;
-}
-
-
-/**
- * Create a new channel and insert it in the channel list of the cadet handle
- *
- * @param h Cadet handle
- * @param ccn Desired ccn of the channel, 0 to assign one automatically.
- *
- * @return Handle to the created channel.
- */
-static struct GNUNET_CADET_Channel *
-create_channel (struct GNUNET_CADET_Handle *h,
- struct GNUNET_CADET_ClientChannelNumber ccn)
-{
- struct GNUNET_CADET_Channel *ch;
-
- ch = GNUNET_new (struct GNUNET_CADET_Channel);
- GNUNET_CONTAINER_DLL_insert (h->channels_head,
- h->channels_tail,
- ch);
- ch->cadet = h;
- if (0 == ccn.channel_of_client)
- {
- ch->ccn = h->next_ccn;
- while (NULL != retrieve_channel (h,
- h->next_ccn))
- {
- h->next_ccn.channel_of_client
- = htonl (1 + ntohl (h->next_ccn.channel_of_client));
- if (0 == ntohl (h->next_ccn.channel_of_client))
- h->next_ccn.channel_of_client
- = htonl (GNUNET_CADET_LOCAL_CHANNEL_ID_CLI);
- }
- }
- else
- {
- ch->ccn = ccn;
- }
- return ch;
-}
-
-
-/**
- * Destroy the specified channel.
- * - Destroys all peers, calling the disconnect callback on each if needed
- * - Cancels all outgoing traffic for that channel, calling respective notifys
- * - Calls cleaner if channel was inbound
- * - Frees all memory used
- *
- * @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)
-{
- struct GNUNET_CADET_Handle *h;
- struct GNUNET_CADET_TransmitHandle *th;
- struct GNUNET_CADET_TransmitHandle *next;
-
- if (NULL == ch)
- {
- GNUNET_break (0);
- return;
- }
- h = ch->cadet;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- " destroy_channel %X of %p\n",
- ch->ccn,
- h);
-
- GNUNET_CONTAINER_DLL_remove (h->channels_head,
- h->channels_tail,
- ch);
- if (NULL != ch->mq_cont)
- {
- GNUNET_SCHEDULER_cancel (ch->mq_cont);
- ch->mq_cont = NULL;
- }
- /* signal channel destruction */
- if (0 != ch->peer)
- {
- if (NULL != h->cleaner)
- {
- /** @a deprecated */
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- " calling cleaner\n");
- h->cleaner (h->cls, ch, ch->ctx);
- }
- else if (NULL != ch->disconnects)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- " calling disconnect handler\n");
- ch->disconnects (ch->ctx, ch);
- }
- else
- {
- /* Application won't be aware of the channel destruction and use
- * a pointer to free'd memory.
- */
- GNUNET_assert (0);
- }
- }
-
- /* 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_CADET_notify_transmit_ready_cancel (th);
- }
-
- if (0 != ch->peer)
- GNUNET_PEER_change_rc (ch->peer, -1);
- GNUNET_free (ch);
-}
-
-
-/**
- * Add a transmit handle to the transmission queue and set the
- * timeout if needed.
- *
- * @param h cadet handle with the queue head and tail
- * @param th handle to the packet to be transmitted
- */
-static void
-add_to_queue (struct GNUNET_CADET_Handle *h,
- struct GNUNET_CADET_TransmitHandle *th)
-{
- GNUNET_CONTAINER_DLL_insert_tail (h->th_head,
- h->th_tail,
- th);
-}
-
-
-/**
- * Remove a transmit handle from the transmission queue, if present.
- *
- * Safe to call even if not queued.
- *
- * @param th handle to the packet to be unqueued.
- */
-static void
-remove_from_queue (struct GNUNET_CADET_TransmitHandle *th)
-{
- struct GNUNET_CADET_Handle *h = th->channel->cadet;
-
- /* It might or might not have been queued (rarely not), but check anyway. */
- if (NULL != th->next || h->th_tail == th)
- {
- GNUNET_CONTAINER_DLL_remove (h->th_head, h->th_tail, th);
- }
-}
-
-
-/**
- * Notify the application about a change in the window size (if needed).
- *
- * @param ch Channel to notify about.
- */
-static void
-notify_window_size (struct GNUNET_CADET_Channel *ch)
-{
- if (NULL != ch->window_changes)
- {
- ch->window_changes (ch->ctx, ch, ch->allow_send);
- }
-}
-
-/******************************************************************************/
-/*********************** MQ API CALLBACKS ****************************/
-/******************************************************************************/
-
-/**
- * Allow the MQ implementation to send the next message.
- *
- * @param cls Closure (channel whose mq to activate).
- */
-static void
-cadet_mq_send_continue (void *cls)
-{
- struct GNUNET_CADET_Channel *ch = cls;
-
- ch->mq_cont = NULL;
- GNUNET_MQ_impl_send_continue (ch->mq);
-}
-
-/**
- * Implement sending functionality of a message queue for
- * us sending messages to a peer.
- *
- * 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.
- *
- * @param mq the message queue
- * @param msg the message to send
- * @param impl_state state of the implementation
- */
-static void
-cadet_mq_send_impl (struct GNUNET_MQ_Handle *mq,
- const struct GNUNET_MessageHeader *msg,
- void *impl_state)
-{
- 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)
- {
- /* We're currently reconnecting, pretend this worked */
- GNUNET_MQ_impl_send_continue (mq);
- return;
- }
-
- /* check message size for sanity */
- msize = ntohs (msg->size);
- if (msize > GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- GNUNET_MQ_impl_send_continue (mq);
- return;
- }
-
- env = GNUNET_MQ_msg_nested_mh (cadet_msg,
- GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
- msg);
- cadet_msg->ccn = ch->ccn;
-
- if (0 < ch->allow_send)
- {
- /* Service has allowed this message, just send it and continue accepting */
- GNUNET_MQ_send (h->mq, env);
- ch->allow_send--;
- ch->mq_cont = GNUNET_SCHEDULER_add_now (&cadet_mq_send_continue, ch);
- // notify_window_size (ch); /* FIXME add "verbose" setting? */
- }
- else
- {
- /* Service has NOT allowed this message, queue it and wait for an ACK */
- GNUNET_assert (NULL == ch->pending_env);
- ch->pending_env = env;
- }
-}
-
-
-/**
- * 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
-cadet_mq_destroy_impl (struct GNUNET_MQ_Handle *mq,
- void *impl_state)
-{
- struct GNUNET_CADET_Channel *ch = impl_state;
-
- GNUNET_assert (mq == ch->mq);
- ch->mq = NULL;
-}
-
-
-/**
- * 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 cls closure
- * @param error error code
- */
-static void
-cadet_mq_error_handler (void *cls,
- enum GNUNET_MQ_Error error)
-{
- GNUNET_break_op (0);
-}
-
-
-/**
- * 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;
-
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Cannot cancel mq message on channel %X of %p\n",
- ch->ccn.channel_of_client, ch->cadet);
-
- GNUNET_break (0);
-}
-
-
-/******************************************************************************/
-/*********************** RECEIVE HANDLERS ****************************/
-/******************************************************************************/
-
-
-/**
- * Call the @a notify callback given to #GNUNET_CADET_notify_transmit_ready to
- * request the data to send over MQ. Since MQ manages the queue, this function
- * is scheduled immediatly after a transmit ready notification.
- *
- * @param cls Closure (transmit handle).
- */
-static void
-request_data (void *cls)
-{
- struct GNUNET_CADET_TransmitHandle *th = cls;
- struct GNUNET_CADET_LocalData *msg;
- struct GNUNET_MQ_Envelope *env;
- size_t osize;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Requesting Data: %u bytes (allow send is %u)\n",
- th->size,
- th->channel->allow_send);
-
- GNUNET_assert (0 < th->channel->allow_send);
- th->channel->allow_send--;
- /* NOTE: we may be allowed to send another packet immediately,
- albeit the current logic waits for the ACK. */
- th->request_data_task = NULL;
- remove_from_queue (th);
-
- env = GNUNET_MQ_msg_extra (msg,
- th->size,
- GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA);
- msg->ccn = th->channel->ccn;
- osize = th->notify (th->notify_cls,
- th->size,
- &msg[1]);
- GNUNET_assert (osize == th->size);
-
- GNUNET_MQ_send (th->channel->cadet->mq,
- env);
- GNUNET_free (th);
-}
-
-
-/**
- * Process the new channel notification and add it to the channels in the handle
- *
- * @param h The cadet handle
- * @param msg A message with the details of the new incoming channel
- */
-static void
-handle_channel_created (void *cls,
- const struct GNUNET_CADET_LocalChannelCreateMessage *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_Port *port;
- const struct GNUNET_HashCode *port_number;
- struct GNUNET_CADET_ClientChannelNumber ccn;
-
- ccn = msg->ccn;
- port_number = &msg->port;
- if (ntohl (ccn.channel_of_client) >= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
- {
- GNUNET_break (0);
- return;
- }
- port = find_port (h, port_number);
- if (NULL == port)
- {
- /* 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;
-
- GNUNET_break (0);
- 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;
- }
-
- ch = create_channel (h,
- ccn);
- ch->peer = GNUNET_PEER_intern (&msg->peer);
- ch->cadet = h;
- ch->ccn = ccn;
- 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);
-
- if (NULL != port->handler)
- {
- /** @deprecated */
- /* Old style API */
- ch->ctx = port->handler (port->cls,
- ch,
- &msg->peer,
- port->hash,
- ch->options);
- }
- else
- {
- /* MQ API */
- 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);
- }
-}
-
-
-/**
- * Process the channel destroy notification and free associated resources
- *
- * @param h The cadet handle
- * @param msg A message with the details of the channel being destroyed
- */
-static void
-handle_channel_destroy (void *cls,
- const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_ClientChannelNumber ccn;
-
- ccn = msg->ccn;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Channel %X Destroy from service\n",
- ntohl (ccn.channel_of_client));
- ch = retrieve_channel (h,
- ccn);
-
- if (NULL == ch)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "channel %X unknown\n",
- ntohl (ccn.channel_of_client));
- return;
- }
- 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)
-{
- struct GNUNET_CADET_Handle *h = cls;
- struct GNUNET_CADET_Channel *ch;
- uint16_t size;
-
- size = ntohs (message->header.size);
- if (sizeof (*message) + sizeof (struct GNUNET_MessageHeader) > size)
- {
- GNUNET_break_op (0);
- return GNUNET_SYSERR;
- }
-
- ch = retrieve_channel (h,
- message->ccn);
- if (NULL == ch)
- {
- GNUNET_break_op (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
- */
-static void
-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_Channel *ch;
- uint16_t type;
- int fwd;
-
- ch = retrieve_channel (h,
- message->ccn);
- if (NULL == ch)
- {
- GNUNET_break_op (0);
- reconnect (h);
- return;
- }
-
- payload = (struct GNUNET_MessageHeader *) &message[1];
- type = ntohs (payload->type);
- 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 %s (%u)\n",
- GC_f2s (fwd),
- GNUNET_i2s (GNUNET_PEER_resolve2 (ch->peer)),
- ntohl (message->ccn.channel_of_client),
- GC_m2s (type),
- type);
- if (NULL != ch->mq)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "injecting msg %s into mq %p\n",
- GC_m2s (ntohs (payload->type)),
- ch->mq);
- GNUNET_MQ_inject_message (ch->mq,
- payload);
- return;
- }
- /** @a deprecated */
- for (unsigned i=0;i<h->n_handlers;i++)
- {
- handler = &h->message_handlers[i];
- 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;
- }
- return;
- }
- }
- /* Other peer sent message we do not comprehend. */
- GNUNET_break_op (0);
- GNUNET_CADET_receive_done (ch);
-}
-
-
-/**
- * Process a local ACK message, enabling the client to send
- * more data to the service.
- *
- * @param h Cadet handle.
- * @param message Message itself.
- */
-static void
-handle_local_ack (void *cls,
- const struct GNUNET_CADET_LocalAck *message)
-{
- struct GNUNET_CADET_Handle *h = cls;
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_ClientChannelNumber ccn;
- struct GNUNET_CADET_TransmitHandle *th;
-
- ccn = message->ccn;
- ch = retrieve_channel (h, ccn);
- if (NULL == ch)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "ACK on unknown channel %X\n",
- ntohl (ccn.channel_of_client));
- return;
- }
- ch->allow_send++;
- if (NULL != ch->mq)
- {
- if (NULL == ch->pending_env)
- {
- 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);
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Got an ACK on mq channel %X, sending pending message!\n",
- ntohl (ch->ccn.channel_of_client));
- GNUNET_MQ_send (h->mq, ch->pending_env);
- ch->allow_send--;
- ch->pending_env = NULL;
- ch->mq_cont = GNUNET_SCHEDULER_add_now (&cadet_mq_send_continue, ch);
- }
- return;
- }
-
- /** @deprecated */
- /* Old style API */
- for (th = h->th_head; NULL != th; th = th->next)
- {
- if ( (th->channel == ch) &&
- (NULL == th->request_data_task) )
- {
- th->request_data_task
- = GNUNET_SCHEDULER_add_now (&request_data,
- th);
- break;
- }
- }
-}
-
-
-/**
- * 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 cls closure, a `struct GNUNET_CORE_Handle *`
- * @param error error code
- */
-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 reply about info on all channels, pass info to the user.
- *
- * @param h Cadet handle.
- * @param message Message itself.
- */
-// 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);
-// }
-
-
-
-/*
- * Process a local monitor_channel reply, pass info to the user.
- *
- * @param h Cadet handle.
- * @param message 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);
-// }
-
-
-
-/**
- * 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_get_peers (void *cls,
- const struct GNUNET_CADET_LocalInfoPeer *message)
-{
- struct GNUNET_CADET_Handle *h = cls;
- uint16_t size;
-
- if (NULL == h->info_cb.peers_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- " no handler for peesr monitor message!\n");
- return GNUNET_SYSERR;
- }
-
- size = ntohs (message->header.size);
- if (sizeof (struct GNUNET_CADET_LocalInfoPeer) > size)
- {
- h->info_cb.peers_cb (h->info_cls, NULL, -1, 0, 0);
- h->info_cb.peers_cb = NULL;
- h->info_cls = NULL;
- return GNUNET_SYSERR;
- }
-
- return GNUNET_OK;
-}
-
-
-/**
- * Process a local reply about info on all tunnels, pass info to the user.
- *
- * @param cls Closure (Cadet handle).
- * @param msg Message itself.
- */
-static void
-handle_get_peers (void *cls,
- const struct GNUNET_CADET_LocalInfoPeer *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
- h->info_cb.peers_cb (h->info_cls, &msg->destination,
- (int) ntohs (msg->tunnel),
- (unsigned int ) ntohs (msg->paths),
- 0);
-}
-
-
-/**
- * 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_get_peer (void *cls,
- const struct GNUNET_CADET_LocalInfoPeer *message)
-{
- struct GNUNET_CADET_Handle *h = cls;
- const size_t msize = sizeof (struct GNUNET_CADET_LocalInfoPeer);
- struct GNUNET_PeerIdentity *paths_array;
- size_t esize;
- unsigned int epaths;
- unsigned int paths;
- unsigned int peers;
-
- if (NULL == h->info_cb.peer_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- " no handler for peer monitor message!\n");
- goto clean_cls;
- }
-
- /* Verify message sanity */
- esize = ntohs (message->header.size);
- if (esize < msize)
- {
- GNUNET_break_op (0);
- h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
- goto clean_cls;
- }
- if (0 != ((esize - msize) % sizeof (struct GNUNET_PeerIdentity)))
- {
- GNUNET_break_op (0);
- h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
- goto clean_cls;
-
- }
- peers = (esize - msize) / sizeof (struct GNUNET_PeerIdentity);
- epaths = (unsigned int) ntohs (message->paths);
- paths_array = (struct GNUNET_PeerIdentity *) &message[1];
- paths = 0;
- for (int i = 0; i < peers; i++)
- {
- if (0 == memcmp (&paths_array[i], &message->destination,
- sizeof (struct GNUNET_PeerIdentity)))
- {
- paths++;
- }
- }
- if (paths != epaths)
- {
- GNUNET_break_op (0);
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "p:%u, e: %u\n", paths, epaths);
- h->info_cb.peer_cb (h->info_cls, NULL, 0, 0, 0, NULL);
- goto clean_cls;
- }
-
- return GNUNET_OK;
-
-clean_cls:
- h->info_cb.peer_cb = NULL;
- h->info_cls = NULL;
- return GNUNET_SYSERR;
-}
-
-
-/**
- * Process a local peer info reply, pass info to the user.
- *
- * @param cls Closure (Cadet handle).
- * @param message Message itself.
- */
-static void
-handle_get_peer (void *cls,
- const struct GNUNET_CADET_LocalInfoPeer *message)
-{
- struct GNUNET_CADET_Handle *h = cls;
- struct GNUNET_PeerIdentity *paths_array;
- unsigned int paths;
- unsigned int path_length;
- int neighbor;
- unsigned int peers;
-
- paths = (unsigned int) ntohs (message->paths);
- paths_array = (struct GNUNET_PeerIdentity *) &message[1];
- peers = (ntohs (message->header.size) - sizeof (*message))
- / sizeof (struct GNUNET_PeerIdentity);
- path_length = 0;
- neighbor = GNUNET_NO;
-
- for (int i = 0; i < peers; i++)
- {
- 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. */
- paths_array = (struct GNUNET_PeerIdentity *) &message[1];
- h->info_cb.peer_cb (h->info_cls,
- &message->destination,
- (int) ntohs (message->tunnel),
- neighbor,
- paths,
- paths_array);
-}
-
-
-/**
- * Check that message received from CADET service is well-formed.
- *
- * @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 int
-check_get_tunnels (void *cls,
- const struct GNUNET_CADET_LocalInfoTunnel *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
- uint16_t size;
-
- if (NULL == h->info_cb.tunnels_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- " no handler for tunnels monitor message!\n");
- return GNUNET_SYSERR;
- }
-
- size = ntohs (msg->header.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 GNUNET_SYSERR;
- }
- return GNUNET_OK;
-}
-
-
-/**
- * Process a local reply about info on all tunnels, pass info to the user.
- *
- * @param cls Closure (Cadet handle).
- * @param message Message itself.
- */
-static void
-handle_get_tunnels (void *cls,
- const struct GNUNET_CADET_LocalInfoTunnel *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
-
- h->info_cb.tunnels_cb (h->info_cls,
- &msg->destination,
- ntohl (msg->channels),
- ntohl (msg->connections),
- ntohs (msg->estate),
- ntohs (msg->cstate));
-
-}
-
-
-/**
- * Check that message received from CADET service is well-formed.
- *
- * @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 int
-check_get_tunnel (void *cls,
- const struct GNUNET_CADET_LocalInfoTunnel *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
- unsigned int ch_n;
- unsigned int c_n;
- size_t esize;
- size_t msize;
-
- if (NULL == h->info_cb.tunnel_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- " no handler for tunnel monitor message!\n");
- goto clean_cls;
- }
-
- /* Verify message sanity */
- 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;
- }
- ch_n = ntohl (msg->channels);
- c_n = ntohl (msg->connections);
- 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",
- (unsigned int) msize,
- (unsigned int) esize,
- ch_n,
- c_n);
- h->info_cb.tunnel_cb (h->info_cls,
- NULL, 0, 0, NULL, NULL, 0, 0);
- goto clean_cls;
- }
-
- return GNUNET_OK;
-
-clean_cls:
- h->info_cb.tunnel_cb = NULL;
- h->info_cls = NULL;
- return GNUNET_SYSERR;
-}
-
-
-/**
- * Process a local tunnel info reply, pass info to the user.
- *
- * @param cls Closure (Cadet handle).
- * @param msg Message itself.
- */
-static void
-handle_get_tunnel (void *cls,
- const struct GNUNET_CADET_LocalInfoTunnel *msg)
-{
- struct GNUNET_CADET_Handle *h = cls;
- unsigned int ch_n;
- unsigned int c_n;
- const struct GNUNET_CADET_ConnectionTunnelIdentifier *conns;
- const struct GNUNET_CADET_ChannelTunnelNumber *chns;
-
- 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));
-}
-
-
-/**
- * Reconnect to the service, retransmit all infomation to try to restore the
- * original state.
- *
- * @param h handle to the cadet
- */
-static void
-reconnect (struct GNUNET_CADET_Handle *h)
-{
- 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_var_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_var_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),
-// FIXME
-// GNUNET_MQ_hd_fixed_Y size (channel_destroyed,
-// GNUNET_MESSAGE_TYPE_CADET_CHANNEL_OPEN_NACK_DEPRECATED,
-// struct GNUNET_CADET_ChannelDestroyMessage);
- GNUNET_MQ_handler_end ()
- };
- struct GNUNET_CADET_Channel *ch;
-
- while (NULL != (ch = h->channels_head))
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Destroying channel due to a reconnect\n");
- destroy_channel (ch);
- }
-
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Connecting to CADET\n");
-
- if (NULL != h->mq)
- {
- GNUNET_MQ_destroy (h->mq);
- h->mq = NULL;
- }
- h->mq = GNUNET_CLIENT_connect (h->cfg,
- "cadet",
- handlers,
- &handle_mq_error,
- h);
- if (NULL == h->mq)
- {
- schedule_reconnect (h);
- return;
- }
- else
- {
- h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
- }
-}
-
-/**
- * Reconnect callback: tries to reconnect again after a failer previous
- * reconnecttion
- *
- * @param cls closure (cadet handle)
- */
-static void
-reconnect_cbk (void *cls)
-{
- struct GNUNET_CADET_Handle *h = cls;
-
- h->reconnect_task = NULL;
- reconnect (h);
-}
-
-
-/**
- * Reconnect to the service, retransmit all infomation to try to restore the
- * original state.
- *
- * @param h handle to the cadet
- *
- * @return #GNUNET_YES in case of sucess, #GNUNET_NO otherwise (service down...)
- */
-static void
-schedule_reconnect (struct GNUNET_CADET_Handle *h)
-{
- if (NULL == h->reconnect_task)
- {
- h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
- &reconnect_cbk, h);
- h->reconnect_time = GNUNET_TIME_STD_BACKOFF (h->reconnect_time);
- }
-}
-
-
-/******************************************************************************/
-/********************** API CALL DEFINITIONS *************************/
-/******************************************************************************/
-
-struct GNUNET_CADET_Handle *
-GNUNET_CADET_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
- void *cls,
- GNUNET_CADET_ChannelEndHandler cleaner,
- const struct GNUNET_CADET_MessageHandler *handlers)
-{
- struct GNUNET_CADET_Handle *h;
-
- h = GNUNET_new (struct GNUNET_CADET_Handle);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "GNUNET_CADET_connect() %p\n",
- h);
- h->cfg = cfg;
- h->cleaner = cleaner;
- h->ports = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_YES);
- reconnect (h);
- if (h->mq == NULL)
- {
- GNUNET_break (0);
- GNUNET_CADET_disconnect (h);
- return NULL;
- }
- h->cls = cls;
- h->message_handlers = handlers;
- h->next_ccn.channel_of_client = htonl (GNUNET_CADET_LOCAL_CHANNEL_ID_CLI);
- h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
- h->reconnect_task = NULL;
-
- /* count handlers */
- for (h->n_handlers = 0;
- handlers && handlers[h->n_handlers].type;
- h->n_handlers++) ;
- return h;
-}
-
-
-/**
- * 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)
-{
- 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 (ntohl (ch->ccn.channel_of_client) >= GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
- {
- GNUNET_break (0);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "channel %X not destroyed\n",
- ntohl (ch->ccn.channel_of_client));
- }
- destroy_channel (ch);
- ch = aux;
- }
- while (NULL != (th = handle->th_head))
- {
- struct GNUNET_MessageHeader *msg;
-
- /* 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_CHANNEL_OPEN:
- case GNUNET_MESSAGE_TYPE_CADET_CHANNEL_DESTROY:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN:
- case GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE:
- 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 unsent msg %s\n",
- GC_m2s (ntohs(msg->type)));
- }
-
- GNUNET_CADET_notify_transmit_ready_cancel (th);
- }
-
- if (NULL != handle->mq)
- {
- GNUNET_MQ_destroy (handle->mq);
- handle->mq = NULL;
- }
- if (NULL != handle->reconnect_task)
- {
- GNUNET_SCHEDULER_cancel(handle->reconnect_task);
- handle->reconnect_task = NULL;
- }
-
- GNUNET_CONTAINER_multihashmap_destroy (handle->ports);
- handle->ports = NULL;
- GNUNET_free (handle);
-}
-
-
-/**
- * Open a port to receive incomming channels.
- *
- * @param h CADET handle.
- * @param port Hash representing the port number.
- * @param new_channel Function called when an channel is received.
- * @param new_channel_cls Closure for @a new_channel.
- * @return Port handle.
- */
-struct GNUNET_CADET_Port *
-GNUNET_CADET_open_port (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_HashCode *port,
- GNUNET_CADET_InboundChannelNotificationHandler
- new_channel,
- void *new_channel_cls)
-{
- struct GNUNET_CADET_PortMessage *msg;
- struct GNUNET_MQ_Envelope *env;
- struct GNUNET_CADET_Port *p;
-
- GNUNET_assert (NULL != new_channel);
- p = GNUNET_new (struct GNUNET_CADET_Port);
- p->cadet = h;
- p->hash = GNUNET_new (struct GNUNET_HashCode);
- *p->hash = *port;
- p->handler = new_channel;
- p->cls = new_channel_cls;
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CONTAINER_multihashmap_put (h->ports,
- p->hash,
- p,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
-
- env = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN);
- msg->port = *p->hash;
- GNUNET_MQ_send (h->mq, env);
-
- return p;
-}
-
-/**
- * Close a port opened with @a GNUNET_CADET_open_port.
- * The @a new_channel callback will no longer be called.
- *
- * @param p Port handle.
- */
-void
-GNUNET_CADET_close_port (struct GNUNET_CADET_Port *p)
-{
- struct GNUNET_CADET_PortMessage *msg;
- struct GNUNET_MQ_Envelope *env;
- struct GNUNET_HashCode *id;
-
- env = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE);
-
- id = NULL != p->hash ? p->hash : &p->id;
- msg->port = *id;
- GNUNET_MQ_send (p->cadet->mq, env);
- GNUNET_CONTAINER_multihashmap_remove (p->cadet->ports, id, p);
- GNUNET_free_non_null (p->hash);
- GNUNET_free (p);
-}
-
-
-/**
- * Create a new channel towards a remote peer.
- *
- * 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 hash (port number).
- * @param options CadetOption flag field, with all desired option bits set to 1.
- * @return handle to the channel
- */
-struct GNUNET_CADET_Channel *
-GNUNET_CADET_channel_create (struct GNUNET_CADET_Handle *h,
- void *channel_ctx,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_HashCode *port,
- enum GNUNET_CADET_ChannelOption options)
-{
- struct GNUNET_CADET_LocalChannelCreateMessage *msg;
- struct GNUNET_MQ_Envelope *env;
- struct GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_ClientChannelNumber ccn;
-
- ccn.channel_of_client = htonl (0);
- ch = create_channel (h, ccn);
- ch->ctx = channel_ctx;
- ch->peer = GNUNET_PEER_intern (peer);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Creating new channel to %s:%u at %p number %X\n",
- GNUNET_i2s (peer),
- port,
- ch,
- ntohl (ch->ccn.channel_of_client));
- env = GNUNET_MQ_msg (msg,
- GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE);
- msg->ccn = ch->ccn;
- msg->port = *port;
- msg->peer = *peer;
- msg->opt = htonl (options);
- GNUNET_MQ_send (h->mq,
- env);
- return ch;
-}
-
-
-void
-GNUNET_CADET_channel_destroy (struct GNUNET_CADET_Channel *channel)
-{
- struct GNUNET_CADET_Handle *h;
- struct GNUNET_CADET_LocalChannelDestroyMessage *msg;
- struct GNUNET_MQ_Envelope *env;
- struct GNUNET_CADET_TransmitHandle *th;
- struct GNUNET_CADET_TransmitHandle *next;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Destroying channel\n");
- h = channel->cadet;
- for (th = h->th_head; th != NULL; th = next)
- {
- next = th->next;
- if (th->channel == channel)
- {
- GNUNET_break (0);
- if (GNUNET_YES == th_is_payload (th))
- {
- /* applications should cancel before destroying channel */
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Channel destroyed without cancelling transmission requests\n");
- th->notify (th->notify_cls, 0, NULL);
- }
- else
- {
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "no meta-traffic should be queued\n");
- }
- GNUNET_CONTAINER_DLL_remove (h->th_head,
- h->th_tail,
- th);
- GNUNET_CADET_notify_transmit_ready_cancel (th);
- }
- }
-
- 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);
-}
-
-
-/**
- * Get information about a channel.
- *
- * @param channel Channel handle.
- * @param option Query (GNUNET_CADET_OPTION_*).
- * @param ... dependant on option, currently not used
- *
- * @return Union with an answer to the query.
- */
-const union GNUNET_CADET_ChannelInfo *
-GNUNET_CADET_channel_get_info (struct GNUNET_CADET_Channel *channel,
- 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_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;
- break;
- case GNUNET_CADET_OPTION_PEER:
- ret = (const union GNUNET_CADET_ChannelInfo *) GNUNET_PEER_resolve2 (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 (NULL != notify);
- GNUNET_assert (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE >= notify_size);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "CADET NOTIFY TRANSMIT READY on channel %X allow_send is %u to %s with %u bytes\n",
- ntohl (channel->ccn.channel_of_client),
- channel->allow_send,
- (ntohl (channel->ccn.channel_of_client) >=
- GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
- ? "origin"
- : "destination",
- (unsigned int) notify_size);
- if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us != maxdelay.rel_value_us)
- {
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "CADET transmit ready timeout is deprected (has no effect)\n");
- }
-
- th = GNUNET_new (struct GNUNET_CADET_TransmitHandle);
- th->channel = channel;
- th->size = notify_size;
- th->notify = notify;
- th->notify_cls = notify_cls;
- if (0 != channel->allow_send)
- th->request_data_task
- = GNUNET_SCHEDULER_add_now (&request_data,
- th);
- else
- add_to_queue (channel->cadet,
- th);
- return th;
-}
-
-
-void
-GNUNET_CADET_notify_transmit_ready_cancel (struct GNUNET_CADET_TransmitHandle *th)
-{
- if (NULL != th->request_data_task)
- {
- GNUNET_SCHEDULER_cancel (th->request_data_task);
- th->request_data_task = NULL;
- }
- remove_from_queue (th);
- GNUNET_free (th);
-}
-
-
-/**
- * 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)
-{
- 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);
-}
-
-
-static void
-send_info_request (struct GNUNET_CADET_Handle *h, uint16_t type)
-{
- struct GNUNET_MessageHeader *msg;
- struct GNUNET_MQ_Envelope *env;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- " Sending %s monitor message to service\n",
- GC_m2s(type));
-
- env = GNUNET_MQ_msg (msg, type);
- GNUNET_MQ_send (h->mq, env);
-}
-
-
-/**
- * Request a debug dump on the service's STDERR.
- *
- * WARNING: unstable API, likely to change in the future!
- *
- * @param h cadet handle
- */
-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);
-}
-
-
-/**
- * Request information about peers known to the running cadet service.
- * 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_CADET_get_peers (struct GNUNET_CADET_Handle *h,
- GNUNET_CADET_PeersCB callback,
- void *callback_cls)
-{
- if (NULL != h->info_cb.peers_cb)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- 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;
-}
-
-
-/**
- * Cancel a peer info request. The callback will not be called (anymore).
- *
- * WARNING: unstable API, likely to change in the future!
- *
- * @param h Cadet handle.
- *
- * @return Closure given to GNUNET_CADET_get_peers.
- */
-void *
-GNUNET_CADET_get_peers_cancel (struct GNUNET_CADET_Handle *h)
-{
- void *cls;
-
- cls = h->info_cls;
- h->info_cb.peers_cb = NULL;
- h->info_cls = NULL;
- return cls;
-}
-
-
-/**
- * Request information about a peer known to the running cadet peer.
- * The callback will be called for the tunnel once.
- * 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 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)
-{
- struct GNUNET_CADET_LocalInfo *msg;
- struct GNUNET_MQ_Envelope *env;
-
- if (NULL != h->info_cb.peer_cb)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- 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;
-}
-
-
-/**
- * Request information about tunnels of the running cadet peer.
- * The callback will be called for every tunnel of 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_CADET_get_tunnels (struct GNUNET_CADET_Handle *h,
- GNUNET_CADET_TunnelsCB callback,
- void *callback_cls)
-{
- if (NULL != h->info_cb.tunnels_cb)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- 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.
- */
-void *
-GNUNET_CADET_get_tunnels_cancel (struct GNUNET_CADET_Handle *h)
-{
- void *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.
- * 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 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_tunnel (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_PeerIdentity *id,
- GNUNET_CADET_TunnelCB callback,
- void *callback_cls)
-{
- struct GNUNET_CADET_LocalInfo *msg;
- struct GNUNET_MQ_Envelope *env;
-
- if (NULL != h->info_cb.tunnel_cb)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- 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.
- *
- * @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.
- *
- * @return #GNUNET_OK / #GNUNET_SYSERR
- */
-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)
-{
- struct GNUNET_CADET_LocalInfo *msg;
- struct GNUNET_MQ_Envelope *env;
-
- if (NULL != h->info_cb.channel_cb)
- {
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
-
- env = GNUNET_MQ_msg (msg, GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_CHANNEL);
- msg->peer = *initiator;
- msg->ccn.channel_of_client = htonl (channel_number);
- GNUNET_MQ_send (h->mq, env);
-
- h->info_cb.channel_cb = callback;
- h->info_cls = callback_cls;
- return GNUNET_OK;
-}
-
-
-/**
- * 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.
- *
- * @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
- */
-static size_t
-cadet_mq_ntr (void *cls, size_t size,
- void *buf)
-{
- 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;
-
- state->th = NULL;
- if (NULL == buf)
- {
- GNUNET_MQ_inject_error (mq, GNUNET_MQ_ERROR_WRITE);
- return 0;
- }
- msize = ntohs (msg->size);
- GNUNET_assert (msize <= size);
- GNUNET_memcpy (buf, msg, msize);
- GNUNET_MQ_impl_send_continue (mq);
- return msize;
-}
-
-
-/**
- * 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
- */
-static void
-cadet_mq_send_impl_old (struct GNUNET_MQ_Handle *mq,
- const struct GNUNET_MessageHeader *msg,
- void *impl_state)
-{
- 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);
-
-}
-
-
-/**
- * Signature of functions implementing the
- * destruction of a message queue.
- * Implementations must not free 'mq', but should
- * take care of 'impl_state'.
- *
- * @param mq the message queue to destroy
- * @param impl_state state of the implementation
- */
-static void
-cadet_mq_destroy_impl_old (struct GNUNET_MQ_Handle *mq,
- void *impl_state)
-{
- struct CadetMQState *state = impl_state;
-
- if (NULL != state->th)
- GNUNET_CADET_notify_transmit_ready_cancel (state->th);
-
- GNUNET_free (state);
-}
-
-
-/**
- * Create a message queue for a cadet channel.
- * The message queue can only be used to transmit messages,
- * not to receive them.
- *
- * @param channel the channel to create the message qeue for
- * @return a message queue to messages over the channel
- */
-struct GNUNET_MQ_Handle *
-GNUNET_CADET_mq_create (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_old,
- &cadet_mq_destroy_impl_old,
- NULL, /* FIXME: cancel impl. */
- state,
- NULL, /* no msg handlers */
- NULL, /* no err handlers */
- NULL); /* no handler cls */
- return mq;
-}
-
-
-/**
- * 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 port Numerical port (unsigned int format).
- *
- * @return A GNUNET_HashCode usable for the new CADET API.
- */
-const struct GNUNET_HashCode *
-GC_u2h (uint32_t port)
-{
- 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;
-}
-
-
-
-/******************************************************************************/
-/******************************* MQ-BASED API *********************************/
-/******************************************************************************/
-
-/**
- * Connect to the MQ-based cadet service.
- *
- * @param cfg Configuration to use.
- *
- * @return Handle to the cadet service NULL on error.
- */
-struct GNUNET_CADET_Handle *
-GNUNET_CADET_connecT (const struct GNUNET_CONFIGURATION_Handle *cfg)
-{
- struct GNUNET_CADET_Handle *h;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "GNUNET_CADET_connecT()\n");
- h = GNUNET_new (struct GNUNET_CADET_Handle);
- h->cfg = cfg;
- h->mq_api = GNUNET_YES;
- h->ports = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_YES);
- reconnect (h);
- if (NULL == h->mq)
- {
- GNUNET_break (0);
- GNUNET_CADET_disconnect (h);
- return NULL;
- }
- 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;
-}
-
-
-/**
- * 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.
- */
-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 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;
- if (NULL != handlers)
- {
- unsigned int i;
- for (i=0;NULL != handlers[i].cb; i++) ;
- p->handlers = GNUNET_new_array (i + 1,
- struct GNUNET_MQ_MessageHandler);
- GNUNET_memcpy ((struct GNUNET_MQ_MessageHandler *) p->handlers,
- handlers,
- i * sizeof (struct GNUNET_MQ_MessageHandler));
- }
-
- 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;
-}
-
-
-/**
- * Create a new channel towards a remote peer.
- *
- * 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.
- */
-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 GNUNET_CADET_Channel *ch;
- struct GNUNET_CADET_ClientChannelNumber ccn;
- struct GNUNET_CADET_LocalChannelCreateMessage *msg;
- struct GNUNET_MQ_Envelope *env;
-
- GNUNET_assert (NULL != disconnects);
-
- /* Save parameters */
- ccn.channel_of_client = htonl (0);
- ch = create_channel (h, ccn);
- ch->ctx = channel_cls;
- ch->peer = GNUNET_PEER_intern (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;
-}
-
-
-/**
- * Obtain the message queue for a connected peer.
- *
- * @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_get_mq (const struct GNUNET_CADET_Channel *channel)
-{
- return channel->mq;
-}
/**
* Version number of GNUnet-cadet API.
*/
-#define GNUNET_CADET_VERSION 0x00000004
+#define GNUNET_CADET_VERSION 0x00000005
/**
struct GNUNET_CADET_Port;
+/**
+ * Hash uniquely identifying a connection below a tunnel.
+ */
+struct GNUNET_CADET_ConnectionTunnelIdentifier
+{
+ struct GNUNET_ShortHashCode connection_of_tunnel;
+};
+
+
+/**
+ * Number identifying a CADET channel within a tunnel.
+ */
+struct GNUNET_CADET_ChannelTunnelNumber
+{
+ /**
+ * Which number does this channel have that uniquely identfies
+ * it within its tunnel, in network byte order.
+ *
+ * Given two peers, both may initiate channels over the same tunnel.
+ * The @e cn must be greater or equal to 0x80000000 (high-bit set)
+ * for tunnels initiated with the peer that has the larger peer
+ * identity as compared using #GNUNET_CRYPTO_cmp_peer_identity().
+ */
+ uint32_t cn GNUNET_PACKED;
+};
+
+
/**
* Channel options. Second line indicates filed in the
* CadetChannelInfo union carrying the answer.
/**
- * Functions with this signature are called whenever a message is
- * received.
- *
- * Each time the function must call #GNUNET_CADET_receive_done on the channel
- * in order to receive the next message. This doesn't need to be immediate:
- * can be delayed if some processing is done on the message.
+ * Method called whenever a peer connects to a port in MQ-based CADET.
*
- * @param cls Closure (set from #GNUNET_CADET_connect).
- * @param channel Connection to the other end.
- * @param channel_ctx Place to store local state associated with the channel.
- * @param message The actual message.
- * @return #GNUNET_OK to keep the channel open,
- * #GNUNET_SYSERR to close it (signal serious error).
- */
-typedef int
-(*GNUNET_CADET_MessageCallback) (void *cls,
- struct GNUNET_CADET_Channel *channel,
- void **channel_ctx,
- const struct GNUNET_MessageHeader *message);
-
-
-/**
- * Message handler. Each struct specifies how to handle on particular
- * type of message received.
+ * @param cls Closure from #GNUNET_CADET_open_porT.
+ * @param channel New handle to the channel.
+ * @param source Peer that started this channel.
+ * @return Closure for the incoming @a channel. It's given to:
+ * - The #GNUNET_CADET_DisconnectEventHandler (given to
+ * #GNUNET_CADET_open_porT) when the channel dies.
+ * - Each the #GNUNET_MQ_MessageCallback handlers for each message
+ * received on the @a channel.
*/
-struct GNUNET_CADET_MessageHandler
-{
- /**
- * Function to call for messages of type @e type.
- */
- GNUNET_CADET_MessageCallback callback;
-
- /**
- * Type of the message this handler covers.
- */
- uint16_t type;
-
- /**
- * Expected size of messages of this type. Use 0 for variable-size.
- * If non-zero, messages of the given type will be discarded if they
- * do not have the right size.
- */
- uint16_t expected_size;
-};
+typedef void *
+(*GNUNET_CADET_ConnectEventHandler) (void *cls,
+ struct GNUNET_CADET_Channel *channel,
+ const struct GNUNET_PeerIdentity *source);
/**
- * Method called whenever another peer has added us to a channel
- * the other peer initiated.
- * Only called (once) upon reception of data with a message type which was
- * subscribed to in #GNUNET_CADET_connect.
- *
- * A call to #GNUNET_CADET_channel_destroy causes te channel to be ignored. In
- * this case the handler MUST return NULL.
+ * Function called whenever an MQ-channel is destroyed, even if the destruction
+ * was requested by #GNUNET_CADET_channel_destroy.
+ * It must NOT call #GNUNET_CADET_channel_destroy on the channel.
*
- * @param cls closure
- * @param channel new handle to the channel
- * @param initiator peer that started the channel
- * @param port Port this channel is for.
- * @param options CadetOption flag field, with all active option bits set to 1.
+ * It should clean up any associated state, including cancelling any pending
+ * transmission on this channel.
*
- * @return initial channel context for the channel
- * (can be NULL -- that's not an error)
+ * @param cls Channel closure.
+ * @param channel Connection to the other end (henceforth invalid).
*/
-typedef void *
-(GNUNET_CADET_InboundChannelNotificationHandler) (void *cls,
- struct GNUNET_CADET_Channel *channel,
- const struct GNUNET_PeerIdentity *initiator,
- const struct GNUNET_HashCode *port,
- enum GNUNET_CADET_ChannelOption options);
+typedef void
+(*GNUNET_CADET_DisconnectEventHandler) (void *cls,
+ const struct GNUNET_CADET_Channel *channel);
/**
- * Function called whenever a channel is destroyed. Should clean up
- * any associated state, including cancelling any pending transmission on this
- * channel.
+ * Function called whenever an MQ-channel's transmission window size changes.
*
- * It must NOT call #GNUNET_CADET_channel_destroy on the channel.
+ * The first callback in an outgoing channel will be with a non-zero value
+ * and will mean the channel is connected to the destination.
+ *
+ * For an incoming channel it will be called immediately after the
+ * #GNUNET_CADET_ConnectEventHandler, also with a non-zero value.
*
- * @param cls closure (set from #GNUNET_CADET_connect)
- * @param channel connection to the other end (henceforth invalid)
- * @param channel_ctx place where local state associated
- * with the channel is stored
+ * @param cls Channel closure.
+ * @param channel Connection to the other end --- FIXME: drop?
+ * @param window_size New window size. If the is more messages than buffer size
+ * this value will be negative. -- FIXME: make unsigned, we never call negative?
*/
typedef void
-(GNUNET_CADET_ChannelEndHandler) (void *cls,
- const struct GNUNET_CADET_Channel *channel,
- void *channel_ctx);
+(*GNUNET_CADET_WindowSizeEventHandler) (void *cls,
+ const struct GNUNET_CADET_Channel *channel,
+ int window_size);
/**
- * Connect to the cadet service.
+ * Connect to the MQ-based cadet service.
*
* @param cfg Configuration to use.
- * @param cls Closure for the various callbacks that follow (including
- * handlers in the handlers array).
- * @param cleaner Function called when a channel is destroyed.
- * It is called immediately if #GNUNET_CADET_channel_destroy
- * is called on the channel.
- * @param handlers Callbacks for messages we care about, NULL-terminated. Each
- * one must call #GNUNET_CADET_receive_done on the channel to
- * receive the next message. Messages of a type that is not
- * in the handlers array are ignored if received.
- *
- * @return handle to the cadet service NULL on error
- * (in this case, init is never called)
+ * @return Handle to the cadet service NULL on error.
*/
struct GNUNET_CADET_Handle *
-GNUNET_CADET_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
- void *cls,
- GNUNET_CADET_ChannelEndHandler cleaner,
- const struct GNUNET_CADET_MessageHandler *handlers);
+GNUNET_CADET_connecT (const struct GNUNET_CONFIGURATION_Handle *cfg);
/**
void
GNUNET_CADET_disconnect (struct GNUNET_CADET_Handle *handle);
+
/**
- * Open a port to receive incomming channels.
+ * Open a port to receive incomming MQ-based channels.
*
* @param h CADET handle.
- * @param port Hash representing the port number.
- * @param new_channel Function called when an channel is received.
- * @param new_channel_cls Closure for @a new_channel.
- *
+ * @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.
+ * Can be NULL.
+ * @param disconnects Function called when a channel is disconnected.
+ * @param handlers Callbacks for messages we care about, NULL-terminated.
* @return Port handle.
*/
struct GNUNET_CADET_Port *
-GNUNET_CADET_open_port (struct GNUNET_CADET_Handle *h,
- const struct GNUNET_HashCode *port,
- GNUNET_CADET_InboundChannelNotificationHandler new_channel,
- void *new_channel_cls);
+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);
+
/**
* Close a port opened with @a GNUNET_CADET_open_port.
void
GNUNET_CADET_close_port (struct GNUNET_CADET_Port *p);
+
/**
* Create a new channel towards a remote peer.
*
* 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
+ * does not accept the channel, @a disconnects 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 hash (port number).
+ * @param h CADET handle.
+ * @param channel_cls Closure for the channel. It's given to:
+ * - The management handler @a window_changes.
+ * - 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.
- *
- * @return handle to the channel
+ * @param window_changes Function called when the transmit window size changes.
+ * Can be NULL if this data is of no interest.
+ * TODO Not yet implemented.
+ * @param disconnects Function called when the channel is disconnected.
+ * @param handlers Callbacks for messages we care about, NULL-terminated.
+ * @return Handle to the channel.
*/
struct GNUNET_CADET_Channel *
-GNUNET_CADET_channel_create (struct GNUNET_CADET_Handle *h,
- void *channel_ctx,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_HashCode *port,
- enum GNUNET_CADET_ChannelOption options);
+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);
/**
GNUNET_CADET_channel_destroy (struct GNUNET_CADET_Channel *channel);
+/**
+ * Obtain the message queue for a connected channel.
+ *
+ * @param channel The channel handle from which to get the MQ.
+ * @return The message queue of the channel.
+ */
+struct GNUNET_MQ_Handle *
+GNUNET_CADET_get_mq (const struct GNUNET_CADET_Channel *channel);
+
+
+/**
+ * Indicate readiness to receive the next message on a channel.
+ *
+ * Should only be called once per handler called.
+ *
+ * @param channel Channel that will be allowed to call another handler.
+ */
+void
+GNUNET_CADET_receive_done (struct GNUNET_CADET_Channel *channel);
+
+
+/******************************************************************************/
+/******************** MONITORING /DEBUG API *************************/
+/******************************************************************************/
+/* The following calls are not useful for normal CADET operation, but for */
+/* debug and monitoring of the cadet state. They can be safely ignored. */
+/* The API can change at any point without notice. */
+/* Please contact the developer if you consider any of this calls useful for */
+/* normal cadet applications. */
+/******************************************************************************/
+
+
+/**
+ * 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 port Numerical port (unsigned int format).
+ *
+ * @return A GNUNET_HashCode usable for the new CADET API.
+ */
+const struct GNUNET_HashCode *
+GC_u2h (uint32_t port);
+
+
+
/**
* Struct to retrieve info about a channel.
*/
...);
-/**
- * Handle for a transmission request.
- */
-struct GNUNET_CADET_TransmitHandle;
-
-
-/**
- * Ask the cadet to call @a notify once it is ready to transmit the
- * given number of bytes to the specified channel.
- * Only one call can be active at any time, to issue another request,
- * wait for the callback or cancel the current request.
- *
- * @param channel channel to use for transmission
- * @param cork is corking allowed for this transmission?
- * @param maxdelay how long can the message wait?
- * @param notify_size how many bytes of buffer space does notify want?
- * @param notify function to call when buffer space is available;
- * will be called with NULL on timeout or if the overall queue
- * for this peer is larger than queue_size and this is currently
- * the message with the lowest priority
- * @param notify_cls closure for @a notify
- * @return non-NULL if the notify callback was queued,
- * NULL if we can not even queue the request (insufficient
- * memory); if NULL is returned, @a notify will NOT be called.
- */
-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);
-
-
-/**
- * Cancel the specified transmission-ready notification.
- *
- * #DEPRECATED
- * Since soon we will send immediately with mq (via request_data),
- * there will be time or need to cancel a "pending" transmission.
- *
- * @param th handle that was returned by "notify_transmit_ready".
- */
-void
-GNUNET_CADET_notify_transmit_ready_cancel (struct GNUNET_CADET_TransmitHandle *th);
-
-
-/**
- * Indicate readiness to receive the next message on a channel.
- *
- * Should only be called once per handler called.
- *
- * @param channel Channel that will be allowed to call another handler.
- */
-void
-GNUNET_CADET_receive_done (struct GNUNET_CADET_Channel *channel);
-
-
-
-/******************************************************************************/
-/******************** MONITORING /DEBUG API *************************/
-/******************************************************************************/
-/* The following calls are not useful for normal CADET operation, but for */
-/* debug and monitoring of the cadet state. They can be safely ignored. */
-/* The API can change at any point without notice. */
-/* Please contact the developer if you consider any of this calls useful for */
-/* normal cadet applications. */
-/******************************************************************************/
-
-
/**
* Method called to retrieve information about a specific channel the cadet peer
* is aware of, including all transit nodes.
uint16_t cstate);
-/**
- * Hash uniquely identifying a connection below a tunnel.
- */
-struct GNUNET_CADET_ConnectionTunnelIdentifier
-{
- struct GNUNET_ShortHashCode connection_of_tunnel;
-};
-
-
-/**
- * Number identifying a CADET channel within a tunnel.
- */
-struct GNUNET_CADET_ChannelTunnelNumber
-{
- /**
- * Which number does this channel have that uniquely identfies
- * it within its tunnel, in network byte order.
- *
- * Given two peers, both may initiate channels over the same tunnel.
- * The @e cn must be greater or equal to 0x80000000 (high-bit set)
- * for tunnels initiated with the peer that has the larger peer
- * identity as compared using #GNUNET_CRYPTO_cmp_peer_identity().
- */
- uint32_t cn GNUNET_PACKED;
-};
-
-
/**
* Method called to retrieve information about a specific tunnel the cadet peer
* has established, o`r is trying to establish.
void *callback_cls);
-/**
- * Create a message queue for a cadet channel.
- * The message queue can only be used to transmit messages,
- * not to receive them.
- *
- * @param channel the channel to create the message qeue for
- * @return a message queue to messages over the channel
- */
-struct GNUNET_MQ_Handle *
-GNUNET_CADET_mq_create (struct GNUNET_CADET_Channel *channel);
-
-
-/**
- * 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 port Numerical port (unsigned int format).
- *
- * @return A GNUNET_HashCode usable for the new CADET API.
- */
-const struct GNUNET_HashCode *
-GC_u2h (uint32_t port);
-
-
-/******************************************************************************/
-/******************************* MQ-BASED API *********************************/
-/******************************************************************************/
-
-/**
- * Method called whenever a peer connects to a port in MQ-based CADET.
- *
- * @param cls Closure from #GNUNET_CADET_open_porT.
- * @param channel New handle to the channel.
- * @param source Peer that started this channel.
- * @return Closure for the incoming @a channel. It's given to:
- * - The #GNUNET_CADET_DisconnectEventHandler (given to
- * #GNUNET_CADET_open_porT) when the channel dies.
- * - Each the #GNUNET_MQ_MessageCallback handlers for each message
- * received on the @a channel.
- */
-typedef void *
-(*GNUNET_CADET_ConnectEventHandler) (void *cls,
- struct GNUNET_CADET_Channel *channel,
- const struct GNUNET_PeerIdentity *source);
-
-
-/**
- * Function called whenever an MQ-channel is destroyed, even if the destruction
- * was requested by #GNUNET_CADET_channel_destroy.
- * It must NOT call #GNUNET_CADET_channel_destroy on the channel.
- *
- * It should clean up any associated state, including cancelling any pending
- * transmission on this channel.
- *
- * @param cls Channel closure.
- * @param channel Connection to the other end (henceforth invalid).
- */
-typedef void
-(*GNUNET_CADET_DisconnectEventHandler) (void *cls,
- const struct GNUNET_CADET_Channel *channel);
-
-
-/**
- * Function called whenever an MQ-channel's transmission window size changes.
- *
- * The first callback in an outgoing channel will be with a non-zero value
- * and will mean the channel is connected to the destination.
- *
- * For an incoming channel it will be called immediately after the
- * #GNUNET_CADET_ConnectEventHandler, also with a non-zero value.
- *
- * @param cls Channel closure.
- * @param channel Connection to the other end --- FIXME: drop?
- * @param window_size New window size. If the is more messages than buffer size
- * this value will be negative. -- FIXME: make unsigned, we never call negative?
- */
-typedef void
-(*GNUNET_CADET_WindowSizeEventHandler) (void *cls,
- const struct GNUNET_CADET_Channel *channel,
- int window_size);
-
-
-/**
- * Connect to the MQ-based cadet service.
- *
- * @param cfg Configuration to use.
- * @return Handle to the cadet service NULL on error.
- */
-struct GNUNET_CADET_Handle *
-GNUNET_CADET_connecT (const struct GNUNET_CONFIGURATION_Handle *cfg);
-
-
-/**
- * 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.
- * Can be NULL.
- * @param disconnects Function called when a channel is disconnected.
- * @param handlers Callbacks for messages we care about, NULL-terminated.
- * @return Port handle.
- */
-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);
-
-/**
- * Create a new channel towards a remote peer.
- *
- * 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 management handler @a window_changes.
- * - 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.
- * Can be NULL if this data is of no interest.
- * TODO Not yet implemented.
- * @param disconnects Function called when the channel is disconnected.
- * @param handlers Callbacks for messages we care about, NULL-terminated.
- * @return Handle to the channel.
- */
-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);
-
-
-/**
- * Obtain the message queue for a connected channel.
- *
- * @param channel The channel handle from which to get the MQ.
- * @return The message queue of the channel.
- */
-struct GNUNET_MQ_Handle *
-GNUNET_CADET_get_mq (const struct GNUNET_CADET_Channel *channel);
-
-
-/******************************************************************************/
-/******************************* MQ-BASED API *********************************/
-/******************************************************************************/
-
-
#if 0 /* keep Emacsens' auto-indent happy */
{
projects / oweals / gnunet.git / commitdiff