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[GNUnet-SVN] r28270 - in gnunet/src: include mesh
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From: |
gnunet |
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Subject: |
[GNUnet-SVN] r28270 - in gnunet/src: include mesh |
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Date: |
Tue, 23 Jul 2013 16:03:50 +0200 |
Author: bartpolot
Date: 2013-07-23 16:03:50 +0200 (Tue, 23 Jul 2013)
New Revision: 28270
Added:
gnunet/src/include/gnunet_mesh_service_enc.h
gnunet/src/mesh/mesh_api_enc.c
gnunet/src/mesh/mesh_protocol_enc.h
Modified:
gnunet/src/mesh/gnunet-service-mesh-enc.c
Log:
- add .h files for new mesh api
Added: gnunet/src/include/gnunet_mesh_service_enc.h
===================================================================
--- gnunet/src/include/gnunet_mesh_service_enc.h
(rev 0)
+++ gnunet/src/include/gnunet_mesh_service_enc.h 2013-07-23 14:03:50 UTC
(rev 28270)
@@ -0,0 +1,454 @@
+/*
+ This file is part of GNUnet.
+ (C) 2009, 2010, 2011, 2012, 2013 Christian Grothoff (and other
contributing authors)
+
+ 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.
+*/
+
+/**
+ * @file include/gnunet_mesh_service_enc.h
+ * @brief mesh service; establish channels to distant peers
+ * @author Christian Grothoff
+ */
+
+#ifndef GNUNET_MESH_SERVICE_H
+#define GNUNET_MESH_SERVICE_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include "gnunet_util_lib.h"
+#include "gnunet_transport_service.h"
+
+/**
+ * Version number of GNUnet-mesh API.
+ */
+#define GNUNET_MESH_VERSION 0x00000002
+
+
+/**
+ * Opaque handle to the service.
+ */
+struct GNUNET_MESH_Handle;
+
+/**
+ * Opaque handle to a tunnel.
+ */
+struct GNUNET_MESH_Tunnel;
+
+
+/**
+ * Options for querying a tunnel.
+ * Second line indicates filed in the MeshTunnelInfo union carrying the answer.
+ */
+enum MeshTunnelOption
+{
+ /**
+ * Disable buffering on intermediate nodes (for minimum latency).
+ * Yes/No.
+ */
+ GNUNET_MESH_OPTION_NOBUFFER = 0x1,
+
+ /**
+ * Enable tunnel reliability, lost messages will be retransmitted.
+ * Yes/No.
+ */
+ GNUNET_MESH_OPTION_RELIABLE = 0x2,
+
+ /**
+ * Enable out of order delivery of messages.
+ * Yes/No.
+ */
+ GNUNET_MESH_OPTION_OOORDER = 0x4,
+
+ /**
+ * Who is the peer at the other end of the tunnel.
+ * struct GNUNET_PeerIdentity *peer
+ */
+ GNUNET_MESH_OPTION_PEER = 0x8
+
+};
+
+
+/**
+ * Functions with this signature are called whenever a message is
+ * received.
+ *
+ * Each time the function must call GNUNET_MESH_receive_done on the tunnel
+ * 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.
+ *
+ * @param cls Closure (set from GNUNET_MESH_connect).
+ * @param tunnel Connection to the other end.
+ * @param tunnel_ctx Place to store local state associated with the tunnel.
+ * @param message The actual message.
+ *
+ * @return GNUNET_OK to keep the tunnel open,
+ * GNUNET_SYSERR to close it (signal serious error).
+ */
+typedef int (*GNUNET_MESH_MessageCallback) (void *cls,
+ struct GNUNET_MESH_Tunnel *tunnel,
+ void **tunnel_ctx,
+ const struct GNUNET_MessageHeader
*message);
+
+
+/**
+ * Message handler. Each struct specifies how to handle on particular
+ * type of message received.
+ */
+struct GNUNET_MESH_MessageHandler
+{
+ /**
+ * Function to call for messages of "type".
+ */
+ GNUNET_MESH_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;
+};
+
+
+/**
+ * Method called whenever another peer has added us to a tunnel
+ * the other peer initiated.
+ * Only called (once) upon reception of data with a message type which was
+ * subscribed to in GNUNET_MESH_connect. A call to GNUNET_MESH_tunnel_destroy
+ * causes te tunnel to be ignored and no further notifications are sent about
+ * the same tunnel.
+ *
+ * @param cls closure
+ * @param tunnel new handle to the tunnel
+ * @param initiator peer that started the tunnel
+ * @param port Port this tunnel is for.
+ * @return initial tunnel context for the tunnel
+ * (can be NULL -- that's not an error)
+ */
+typedef void *(GNUNET_MESH_InboundTunnelNotificationHandler) (void *cls,
+ struct
+
GNUNET_MESH_Tunnel
+ * tunnel,
+ const struct
+
GNUNET_PeerIdentity
+ * initiator,
+ uint32_t port);
+
+
+/**
+ * Function called whenever a tunnel is destroyed. Should clean up
+ * any associated state.
+ *
+ * It must NOT call GNUNET_MESH_tunnel_destroy on the tunnel.
+ *
+ * @param cls closure (set from GNUNET_MESH_connect)
+ * @param tunnel connection to the other end (henceforth invalid)
+ * @param tunnel_ctx place where local state associated
+ * with the tunnel is stored
+ */
+typedef void (GNUNET_MESH_TunnelEndHandler) (void *cls,
+ const struct GNUNET_MESH_Tunnel *
+ tunnel, void *tunnel_ctx);
+
+
+/**
+ * Connect to the mesh service.
+ *
+ * @param cfg Configuration to use.
+ * @param cls Closure for the various callbacks that follow (including
+ * handlers in the handlers array).
+ * @param new_tunnel Function called when an *incoming* tunnel is created.
+ * Can be NULL if no inbound tunnels are desired.
+ * See @c ports.
+ * @param cleaner Function called when a tunnel is destroyed by the remote
peer.
+ * It is NOT called if GNUNET_MESH_tunnel_destroy is called on
+ * the tunnel.
+ * @param handlers Callbacks for messages we care about, NULL-terminated. Each
+ * one must call GNUNET_MESH_receive_done on the tunnel to
+ * receive the next message. Messages of a type that is not
+ * in the handlers array are ignored if received.
+ * @param ports NULL or 0-terminated array of port numbers for incoming
tunnels.
+ * See @c new_tunnel.
+ *
+ * @return handle to the mesh service NULL on error
+ * (in this case, init is never called)
+ */
+struct GNUNET_MESH_Handle *
+GNUNET_MESH_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls,
+ GNUNET_MESH_InboundTunnelNotificationHandler new_tunnel,
+ GNUNET_MESH_TunnelEndHandler cleaner,
+ const struct GNUNET_MESH_MessageHandler *handlers,
+ const uint32_t *ports);
+
+
+/**
+ * Disconnect from the mesh service. All tunnels will be destroyed. All tunnel
+ * disconnect callbacks will be called on any still connected peers, notifying
+ * about their disconnection. The registered inbound tunnel cleaner will be
+ * called should any inbound tunnels still exist.
+ *
+ * @param handle connection to mesh to disconnect
+ */
+void
+GNUNET_MESH_disconnect (struct GNUNET_MESH_Handle *handle);
+
+
+/**
+ * Create a new tunnel (we're initiator and will be allowed to add/remove peers
+ * and to broadcast).
+ *
+ * @param h mesh handle
+ * @param tunnel_ctx client's tunnel context to associate with the tunnel
+ * @param peer peer identity the tunnel should go to
+ * @param port Port number.
+ * @param nobuffer Flag for disabling buffering on relay nodes.
+ * @param reliable Flag for end-to-end reliability.
+ *
+ * @return handle to the tunnel
+ */
+struct GNUNET_MESH_Tunnel *
+GNUNET_MESH_tunnel_create (struct GNUNET_MESH_Handle *h,
+ void *tunnel_ctx,
+ const struct GNUNET_PeerIdentity *peer,
+ uint32_t port,
+ int nobuffer,
+ int reliable);
+
+
+/**
+ * Destroy an existing tunnel.
+ *
+ * The existing end callback for the tunnel 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 tunnel Tunnel handle, becomes invalid after this call.
+ */
+void
+GNUNET_MESH_tunnel_destroy (struct GNUNET_MESH_Tunnel *tunnel);
+
+
+/**
+ * Struct to retrieve info about a tunnel.
+ */
+union MeshTunnelInfo {
+
+ /**
+ * GNUNET_YES / GNUNET_NO, for binary flags.
+ */
+ int yes_no;
+
+ /**
+ * Peer on the other side of the tunnel
+ */
+ struct GNUNET_PeerIdentity *peer;
+};
+
+
+/**
+ * Get information about a tunnel.
+ *
+ * @param tunnel Tunnel handle.
+ * @param option Query, as listed in src/mesh/mesh.h (GNUNET_MESH_OPTION_*)
+ * @param ... dependant on option, currently not used
+ *
+ * @return Union with an answer to the query.
+ */
+const union MeshTunnelInfo *
+GNUNET_MESH_tunnel_get_info (struct GNUNET_MESH_Tunnel *tunnel,
+ enum MeshTunnelOption option, ...);
+
+
+/**
+ * Handle for a transmission request.
+ */
+struct GNUNET_MESH_TransmitHandle;
+
+
+/**
+ * Ask the mesh to call "notify" once it is ready to transmit the
+ * given number of bytes to the specified tunnel.
+ * Only one call can be active at any time, to issue another request,
+ * wait for the callback or cancel the current request.
+ *
+ * @param tunnel tunnel 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 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, "notify" will NOT be called.
+ */
+struct GNUNET_MESH_TransmitHandle *
+GNUNET_MESH_notify_transmit_ready (struct GNUNET_MESH_Tunnel *tunnel, int cork,
+ struct GNUNET_TIME_Relative maxdelay,
+ size_t notify_size,
+ GNUNET_CONNECTION_TransmitReadyNotify
notify,
+ void *notify_cls);
+
+
+/**
+ * Cancel the specified transmission-ready notification.
+ *
+ * @param th handle that was returned by "notify_transmit_ready".
+ */
+void
+GNUNET_MESH_notify_transmit_ready_cancel (struct GNUNET_MESH_TransmitHandle
+ *th);
+
+
+/**
+ * Indicate readiness to receive the next message on a tunnel.
+ *
+ * Should only be called once per handler called.
+ *
+ * @param tunnel Tunnel that will be allowed to call another handler.
+ */
+void
+GNUNET_MESH_receive_done (struct GNUNET_MESH_Tunnel *tunnel);
+
+
+
+/******************************************************************************/
+/******************** MONITORING /DEBUG API
*************************/
+/******************************************************************************/
+/* The following calls are not useful for normal MESH operation, but for
*/
+/* debug and monitoring of the mesh 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 mesh applications.
*/
+/******************************************************************************/
+
+/**
+ * Method called to retrieve information about each tunnel the mesh peer
+ * is aware of.
+ *
+ * @param cls Closure.
+ * @param tunnel_number Tunnel number.
+ * @param origin that started the tunnel (owner).
+ * @param target other endpoint of the tunnel
+ */
+typedef void (*GNUNET_MESH_TunnelsCB) (void *cls,
+ uint32_t tunnel_number,
+ const struct GNUNET_PeerIdentity
*origin,
+ const struct GNUNET_PeerIdentity
*target);
+
+
+/**
+ * Method called to retrieve information about a specific tunnel the mesh peer
+ * is aware of, including all transit nodes.
+ *
+ * @param cls Closure.
+ * @param peer Peer in the tunnel's tree.
+ * @param parent Parent of the current peer. All 0 when peer is root.
+ */
+typedef void (*GNUNET_MESH_TunnelCB) (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_PeerIdentity
*parent);
+
+
+/**
+ * Request information about the running mesh peer.
+ * The callback will be called for every tunnel known to the service,
+ * listing all active peers that belong to the tunnel.
+ *
+ * If called again on the same handle, it will overwrite the previous
+ * callback and cls. To retrieve the cls, monitor_cancel must be
+ * called first.
+ *
+ * WARNING: unstable API, likely to change in the future!
+ *
+ * @param h Handle to the mesh peer.
+ * @param callback Function to call with the requested data.
+ * @param callback_cls Closure for @c callback.
+ */
+void
+GNUNET_MESH_get_tunnels (struct GNUNET_MESH_Handle *h,
+ GNUNET_MESH_TunnelsCB callback,
+ void *callback_cls);
+
+
+/**
+ * Request information about a specific tunnel of the running mesh peer.
+ *
+ * WARNING: unstable API, likely to change in the future!
+ *
+ * @param h Handle to the mesh peer.
+ * @param initiator ID of the owner of the tunnel.
+ * @param tunnel_number Tunnel number.
+ * @param callback Function to call with the requested data.
+ * @param callback_cls Closure for @c callback.
+ */
+void
+GNUNET_MESH_show_tunnel (struct GNUNET_MESH_Handle *h,
+ struct GNUNET_PeerIdentity *initiator,
+ uint32_t tunnel_number,
+ GNUNET_MESH_TunnelCB callback,
+ void *callback_cls);
+
+
+/**
+ * Cancel a monitor request. The monitor callback will not be called.
+ *
+ * WARNING: unstable API, likely to change in the future!
+ *
+ * @param h Mesh handle.
+ *
+ * @return Closure given to GNUNET_MESH_monitor, if any.
+ */
+void *
+GNUNET_MESH_get_tunnels_cancel (struct GNUNET_MESH_Handle *h);
+
+
+/**
+ * Create a message queue for a mesh tunnel.
+ * The message queue can only be used to transmit messages,
+ * not to receive them.
+ *
+ * @param tunnel the tunnel to create the message qeue for
+ * @return a message queue to messages over the tunnel
+ */
+struct GNUNET_MQ_Handle *
+GNUNET_MESH_mq_create (struct GNUNET_MESH_Tunnel *tunnel);
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/* ifndef GNUNET_MESH_SERVICE_H */
+#endif
+/* end of gnunet_mesh_service.h */
Modified: gnunet/src/mesh/gnunet-service-mesh-enc.c
===================================================================
--- gnunet/src/mesh/gnunet-service-mesh-enc.c 2013-07-23 13:27:42 UTC (rev
28269)
+++ gnunet/src/mesh/gnunet-service-mesh-enc.c 2013-07-23 14:03:50 UTC (rev
28270)
@@ -36,7 +36,7 @@
#include "platform.h"
#include "gnunet_crypto_lib.h"
-#include "mesh.h"
+#include "mesh_enc.h"
#include "mesh_protocol_enc.h"
#include "mesh_path.h"
#include "block_mesh.h"
@@ -415,7 +415,7 @@
* - paths[0] To know where to send it next
* - metainfo: ready, speeds, accounting
*/
-struct MeshTunnel
+struct MeshChannel
{
/**
* Tunnel ID
Added: gnunet/src/mesh/mesh_api_enc.c
===================================================================
--- gnunet/src/mesh/mesh_api_enc.c (rev 0)
+++ gnunet/src/mesh/mesh_api_enc.c 2013-07-23 14:03:50 UTC (rev 28270)
@@ -0,0 +1,1804 @@
+/*
+ This file is part of GNUnet.
+ (C) 2011 Christian Grothoff (and other contributing authors)
+ 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.
+*/
+
+/**
+ * @file mesh/mesh_api_enc.c
+ * @brief mesh api: client implementation of new mesh service
+ * @author Bartlomiej Polot
+ */
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_client_lib.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_peer_lib.h"
+#include "gnunet_mesh_service_enc.h"
+#include "mesh.h"
+#include "mesh_protocol.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "mesh-api",__VA_ARGS__)
+#define DEBUG_ACK GNUNET_YES
+
+/******************************************************************************/
+/************************ DATA STRUCTURES
****************************/
+/******************************************************************************/
+
+/**
+ * Transmission queue to the service
+ */
+struct GNUNET_MESH_TransmitHandle
+{
+
+ /**
+ * Double Linked list
+ */
+ struct GNUNET_MESH_TransmitHandle *next;
+
+ /**
+ * Double Linked list
+ */
+ struct GNUNET_MESH_TransmitHandle *prev;
+
+ /**
+ * Tunnel this message is sent on / for (may be NULL for control messages).
+ */
+ struct GNUNET_MESH_Tunnel *tunnel;
+
+ /**
+ * 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;
+};
+
+
+/**
+ * Opaque handle to the service.
+ */
+struct GNUNET_MESH_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 tunnels
+ */
+ const struct GNUNET_MESH_MessageHandler *message_handlers;
+
+ /**
+ * Number of handlers in the handlers array.
+ */
+ unsigned int n_handlers;
+
+ /**
+ * Ports open.
+ */
+ const uint32_t *ports;
+
+ /**
+ * Number of ports.
+ */
+ unsigned int n_ports;
+
+ /**
+ * Double linked list of the tunnels this client is connected to, head.
+ */
+ struct GNUNET_MESH_Tunnel *tunnels_head;
+
+ /**
+ * Double linked list of the tunnels this client is connected to, tail.
+ */
+ struct GNUNET_MESH_Tunnel *tunnels_tail;
+
+ /**
+ * Callback for inbound tunnel creation
+ */
+ GNUNET_MESH_InboundTunnelNotificationHandler *new_tunnel;
+
+ /**
+ * Callback for inbound tunnel disconnection
+ */
+ GNUNET_MESH_TunnelEndHandler *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_MESH_TransmitHandle *th_head;
+
+ /**
+ * Messages to send to the service, tail.
+ */
+ struct GNUNET_MESH_TransmitHandle *th_tail;
+
+ /**
+ * tid of the next tunnel to create (to avoid reusing IDs often)
+ */
+ MESH_TunnelNumber next_tid;
+
+ /**
+ * Have we started the task to receive messages from the service
+ * yet? We do this after we send the 'MESH_LOCAL_CONNECT' message.
+ */
+ int in_receive;
+
+ /**
+ * 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.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+
+ /**
+ * Monitor callback
+ */
+ GNUNET_MESH_TunnelsCB tunnels_cb;
+
+ /**
+ * Monitor callback closure.
+ */
+ void *tunnels_cls;
+
+ /**
+ * Tunnel callback.
+ */
+ GNUNET_MESH_TunnelCB tunnel_cb;
+
+ /**
+ * Tunnel callback closure.
+ */
+ void *tunnel_cls;
+
+#if DEBUG_ACK
+ unsigned int acks_sent;
+ unsigned int acks_recv;
+#endif
+};
+
+
+/**
+ * Description of a peer
+ */
+struct GNUNET_MESH_Peer
+{
+ /**
+ * ID of the peer in short form
+ */
+ GNUNET_PEER_Id id;
+
+ /**
+ * Tunnel this peer belongs to
+ */
+ struct GNUNET_MESH_Tunnel *t;
+
+ /**
+ * Flag indicating whether service has informed about its connection
+ */
+ int connected;
+
+};
+
+
+/**
+ * Opaque handle to a tunnel.
+ */
+struct GNUNET_MESH_Tunnel
+{
+
+ /**
+ * DLL next
+ */
+ struct GNUNET_MESH_Tunnel *next;
+
+ /**
+ * DLL prev
+ */
+ struct GNUNET_MESH_Tunnel *prev;
+
+ /**
+ * Handle to the mesh this tunnel belongs to
+ */
+ struct GNUNET_MESH_Handle *mesh;
+
+ /**
+ * Local ID of the tunnel
+ */
+ MESH_TunnelNumber tid;
+
+ /**
+ * Port number.
+ */
+ uint32_t port;
+
+ /**
+ * Other end of the tunnel.
+ */
+ GNUNET_PEER_Id peer;
+
+ /**
+ * Any data the caller wants to put in here
+ */
+ void *ctx;
+
+ /**
+ * Size of packet queued in this tunnel
+ */
+ unsigned int packet_size;
+
+ /**
+ * Is the tunnel allowed to buffer?
+ */
+ int nobuffer;
+
+ /**
+ * Is the tunnel realiable?
+ */
+ int reliable;
+
+ /**
+ * If reliable, is the tunnel out of order?
+ */
+ int ooorder;
+
+ /**
+ * Are we allowed to send to the service?
+ */
+ int allow_send;
+
+};
+
+
+/**
+ * Implementation state for mesh's message queue.
+ */
+struct MeshMQState
+{
+ /**
+ * The current transmit handle, or NULL
+ * if no transmit is active.
+ */
+ struct GNUNET_MESH_TransmitHandle *th;
+
+ /**
+ * Tunnel to send the data over.
+ */
+ struct GNUNET_MESH_Tunnel *tunnel;
+};
+
+
+/******************************************************************************/
+/*********************** DECLARATIONS
*************************/
+/******************************************************************************/
+
+/**
+ * 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 mesh 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);
+
+
+/******************************************************************************/
+/*********************** 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 mesh management packet.
+ */
+static int
+th_is_payload (struct GNUNET_MESH_TransmitHandle *th)
+{
+ return (th->notify != NULL) ? GNUNET_YES : GNUNET_NO;
+}
+
+
+/**
+ * Check whether there is any message ready in the queue and find the size.
+ *
+ * @param h Mesh handle.
+ *
+ * @return The size of the first ready message in the queue,
+ * 0 if there is none.
+ */
+static size_t
+message_ready_size (struct GNUNET_MESH_Handle *h)
+{
+ struct GNUNET_MESH_TransmitHandle *th;
+ struct GNUNET_MESH_Tunnel *t;
+
+ for (th = h->th_head; NULL != th; th = th->next)
+ {
+ t = th->tunnel;
+ if (GNUNET_NO == th_is_payload (th))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "# message internal\n");
+ return th->size;
+ }
+ if (GNUNET_YES == t->allow_send)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "# message payload ok\n");
+ return th->size;
+ }
+ }
+ return 0;
+}
+
+
+/**
+ * Get the tunnel handler for the tunnel specified by id from the given handle
+ * @param h Mesh handle
+ * @param tid ID of the wanted tunnel
+ * @return handle to the required tunnel or NULL if not found
+ */
+static struct GNUNET_MESH_Tunnel *
+retrieve_tunnel (struct GNUNET_MESH_Handle *h, MESH_TunnelNumber tid)
+{
+ struct GNUNET_MESH_Tunnel *t;
+
+ t = h->tunnels_head;
+ while (t != NULL)
+ {
+ if (t->tid == tid)
+ return t;
+ t = t->next;
+ }
+ return NULL;
+}
+
+
+/**
+ * Create a new tunnel and insert it in the tunnel list of the mesh handle
+ * @param h Mesh handle
+ * @param tid desired tid of the tunnel, 0 to assign one automatically
+ * @return handle to the created tunnel
+ */
+static struct GNUNET_MESH_Tunnel *
+create_tunnel (struct GNUNET_MESH_Handle *h, MESH_TunnelNumber tid)
+{
+ struct GNUNET_MESH_Tunnel *t;
+
+ t = GNUNET_malloc (sizeof (struct GNUNET_MESH_Tunnel));
+ GNUNET_CONTAINER_DLL_insert (h->tunnels_head, h->tunnels_tail, t);
+ t->mesh = h;
+ if (0 == tid)
+ {
+ t->tid = h->next_tid;
+ while (NULL != retrieve_tunnel (h, h->next_tid))
+ {
+ h->next_tid++;
+ h->next_tid &= ~GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
+ h->next_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
+ }
+ }
+ else
+ {
+ t->tid = tid;
+ }
+ t->allow_send = GNUNET_NO;
+ t->nobuffer = GNUNET_NO;
+ return t;
+}
+
+
+/**
+ * Destroy the specified tunnel.
+ * - Destroys all peers, calling the disconnect callback on each if needed
+ * - Cancels all outgoing traffic for that tunnel, calling respective notifys
+ * - Calls cleaner if tunnel was inbound
+ * - Frees all memory used
+ *
+ * @param t Pointer to the tunnel.
+ * @param call_cleaner Whether to call the cleaner handler.
+ *
+ * @return Handle to the required tunnel or NULL if not found.
+ */
+static void
+destroy_tunnel (struct GNUNET_MESH_Tunnel *t, int call_cleaner)
+{
+ struct GNUNET_MESH_Handle *h;
+ struct GNUNET_MESH_TransmitHandle *th;
+ struct GNUNET_MESH_TransmitHandle *next;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "destroy_tunnel %X\n", t->tid);
+
+ if (NULL == t)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ h = t->mesh;
+
+ GNUNET_CONTAINER_DLL_remove (h->tunnels_head, h->tunnels_tail, t);
+
+ /* signal tunnel destruction */
+ if ( (NULL != h->cleaner) && (0 != t->peer) && (GNUNET_YES == call_cleaner) )
+ h->cleaner (h->cls, t, t->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->tunnel != t)
+ continue;
+ /* Clients should have aborted their requests already.
+ * Management traffic should be ok, as clients can't cancel that */
+ GNUNET_break (GNUNET_NO == th_is_payload(th));
+ 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 mesh 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 != t->peer)
+ GNUNET_PEER_change_rc (t->peer, -1);
+ GNUNET_free (t);
+ return;
+}
+
+
+/**
+ * Notify client that the transmission has timed out
+ *
+ * @param cls closure
+ * @param tc task context
+ */
+static void
+timeout_transmission (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_MESH_TransmitHandle *th = cls;
+ struct GNUNET_MESH_Handle *mesh;
+
+ mesh = th->tunnel->mesh;
+ GNUNET_CONTAINER_DLL_remove (mesh->th_head, mesh->th_tail, th);
+ th->tunnel->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 (mesh)) && (NULL != mesh->th))
+ {
+ /* nothing ready to transmit, no point in asking for transmission */
+ GNUNET_CLIENT_notify_transmit_ready_cancel (mesh->th);
+ mesh->th = NULL;
+ }
+}
+
+
+/**
+ * Add a transmit handle to the transmission queue and set the
+ * timeout if needed.
+ *
+ * @param h mesh handle with the queue head and tail
+ * @param th handle to the packet to be transmitted
+ */
+static void
+add_to_queue (struct GNUNET_MESH_Handle *h,
+ struct GNUNET_MESH_TransmitHandle *th)
+{
+ GNUNET_CONTAINER_DLL_insert_tail (h->th_head, h->th_tail, th);
+ if (GNUNET_TIME_UNIT_FOREVER_ABS.abs_value == th->timeout.abs_value)
+ return;
+ th->timeout_task =
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining
+ (th->timeout), &timeout_transmission, th);
+}
+
+
+/**
+ * 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.
+ *
+ * @param h mesh handle
+ * @param msg message to transmit
+ * @param tunnel tunnel this send is related to (NULL if N/A)
+ */
+static void
+send_packet (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *msg,
+ struct GNUNET_MESH_Tunnel *tunnel);
+
+
+/**
+ * Send an ack on the tunnel to confirm the processing of a message.
+ *
+ * @param t Tunnel on which to send the ACK.
+ */
+static void
+send_ack (struct GNUNET_MESH_Tunnel *t)
+{
+ struct GNUNET_MESH_LocalAck msg;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Sending ACK on tunnel %X\n", t->tid);
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
+ msg.header.size = htons (sizeof (msg));
+ msg.tunnel_id = htonl (t->tid);
+
+#if DEBUG_ACK
+ t->mesh->acks_sent++;
+#endif
+
+ send_packet (t->mesh, &msg.header, t);
+ return;
+}
+
+
+
+/**
+ * Reconnect callback: tries to reconnect again after a failer previous
+ * reconnecttion
+ * @param cls closure (mesh handle)
+ * @param tc task context
+ */
+static void
+reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
+/**
+ * Send a connect packet to the service with the applications and types
+ * requested by the user.
+ *
+ * @param h The mesh handle.
+ *
+ */
+static void
+send_connect (struct GNUNET_MESH_Handle *h)
+{
+ size_t size;
+
+ size = sizeof (struct GNUNET_MESH_ClientConnect);
+ size += h->n_ports * sizeof (uint32_t);
+ {
+ char buf[size] GNUNET_ALIGN;
+ struct GNUNET_MESH_ClientConnect *msg;
+ uint32_t *ports;
+ uint16_t i;
+
+ /* build connection packet */
+ msg = (struct GNUNET_MESH_ClientConnect *) buf;
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_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);
+ }
+}
+
+
+/**
+ * Reconnect to the service, retransmit all infomation to try to restore the
+ * original state.
+ *
+ * @param h handle to the mesh
+ *
+ * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
+ */
+static int
+do_reconnect (struct GNUNET_MESH_Handle *h)
+{
+ struct GNUNET_MESH_Tunnel *t;
+
+ 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)
+ {
+ GNUNET_CLIENT_disconnect (h->client);
+ }
+
+ /* connect again */
+ h->client = GNUNET_CLIENT_connect ("mesh", h->cfg);
+ if (h->client == NULL)
+ {
+ 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;
+ }
+ send_connect (h);
+ /* Rebuild all tunnels */
+ for (t = h->tunnels_head; NULL != t; t = t->next)
+ {
+ struct GNUNET_MESH_TunnelMessage tmsg;
+ uint32_t options;
+
+ if (t->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ {
+ /* Tunnel was created by service (incoming tunnel) */
+ /* TODO: Notify service of missing tunnel, to request
+ * creator to recreate path (find a path to him via DHT?)
+ */
+ continue;
+ }
+ t->allow_send = GNUNET_NO;
+ tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
+ tmsg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ tmsg.tunnel_id = htonl (t->tid);
+ tmsg.port = htonl (t->port);
+ GNUNET_PEER_resolve (t->peer, &tmsg.peer);
+
+ options = 0;
+ if (GNUNET_YES == t->nobuffer)
+ options |= GNUNET_MESH_OPTION_NOBUFFER;
+
+ if (GNUNET_YES == t->reliable)
+ options |= GNUNET_MESH_OPTION_RELIABLE;
+
+ tmsg.opt = htonl (options);
+ send_packet (h, &tmsg.header, t);
+ }
+ return GNUNET_YES;
+}
+
+/**
+ * Reconnect callback: tries to reconnect again after a failer previous
+ * reconnecttion
+ * @param cls closure (mesh handle)
+ * @param tc task context
+ */
+static void
+reconnect_cbk (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_MESH_Handle *h = cls;
+
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
+ return;
+ do_reconnect (h);
+}
+
+
+/**
+ * Reconnect to the service, retransmit all infomation to try to restore the
+ * original state.
+ *
+ * @param h handle to the mesh
+ *
+ * @return GNUNET_YES in case of sucess, GNUNET_NO otherwise (service down...)
+ */
+static void
+reconnect (struct GNUNET_MESH_Handle *h)
+{
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Requested RECONNECT\n");
+ h->in_receive = GNUNET_NO;
+ if (GNUNET_SCHEDULER_NO_TASK == h->reconnect_task)
+ h->reconnect_task = GNUNET_SCHEDULER_add_delayed (h->reconnect_time,
+ &reconnect_cbk, h);
+}
+
+
+/******************************************************************************/
+/*********************** RECEIVE HANDLERS
****************************/
+/******************************************************************************/
+
+/**
+ * Process the new tunnel notification and add it to the tunnels in the handle
+ *
+ * @param h The mesh handle
+ * @param msg A message with the details of the new incoming tunnel
+ */
+static void
+process_tunnel_created (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MESH_TunnelMessage *msg)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ MESH_TunnelNumber tid;
+ uint32_t port;
+
+ tid = ntohl (msg->tunnel_id);
+ port = ntohl (msg->port);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating incoming tunnel %X:%u\n", tid, port);
+ if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ if (NULL != h->new_tunnel)
+ {
+ t = create_tunnel (h, tid);
+ t->allow_send = GNUNET_NO;
+ t->peer = GNUNET_PEER_intern (&msg->peer);
+ t->mesh = h;
+ t->tid = tid;
+ t->port = port;
+ if (0 != (msg->opt & GNUNET_MESH_OPTION_NOBUFFER))
+ t->nobuffer = GNUNET_YES;
+ else
+ t->nobuffer = GNUNET_NO;
+ if (0 != (msg->opt & GNUNET_MESH_OPTION_RELIABLE))
+ t->reliable = GNUNET_YES;
+ else
+ t->reliable = GNUNET_NO;
+ if (GNUNET_YES == t->reliable &&
+ 0 != (msg->opt & GNUNET_MESH_OPTION_OOORDER))
+ t->ooorder = GNUNET_YES;
+ else
+ t->ooorder = GNUNET_NO;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " created tunnel %p\n", t);
+ t->ctx = h->new_tunnel (h->cls, t, &msg->peer, t->port);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "User notified\n");
+ }
+ else
+ {
+ struct GNUNET_MESH_TunnelMessage d_msg;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "No handler for incoming tunnels\n");
+
+ d_msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
+ d_msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ d_msg.tunnel_id = msg->tunnel_id;
+ memset (&d_msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
+ d_msg.port = 0;
+ d_msg.opt = 0;
+
+ send_packet (h, &d_msg.header, NULL);
+ }
+ return;
+}
+
+
+/**
+ * Process the tunnel destroy notification and free associated resources
+ *
+ * @param h The mesh handle
+ * @param msg A message with the details of the tunnel being destroyed
+ */
+static void
+process_tunnel_destroy (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MESH_TunnelMessage *msg)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ MESH_TunnelNumber tid;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Destroying tunnel from service\n");
+ tid = ntohl (msg->tunnel_id);
+ t = retrieve_tunnel (h, tid);
+
+ if (NULL == t)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X unknown\n", tid);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X destroyed\n", t->tid);
+ destroy_tunnel (t, GNUNET_YES);
+}
+
+
+/**
+ * Process the incoming data packets, call appropriate handlers.
+ *
+ * @param h The mesh handle
+ * @param message A message encapsulating the data
+ */
+static void
+process_incoming_data (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct GNUNET_MessageHeader *payload;
+ const struct GNUNET_MESH_MessageHandler *handler;
+ struct GNUNET_MESH_LocalData *dmsg;
+ struct GNUNET_MESH_Tunnel *t;
+ unsigned int i;
+ uint16_t type;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a data message!\n");
+
+ dmsg = (struct GNUNET_MESH_LocalData *) message;
+
+ t = retrieve_tunnel (h, ntohl (dmsg->tid));
+ payload = (struct GNUNET_MessageHeader *) &dmsg[1];
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " %s data on tunnel %s [%X]\n",
+ t->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? "fwd" : "bck",
+ GNUNET_i2s (GNUNET_PEER_resolve2(t->peer)), ntohl (dmsg->tid));
+ if (NULL == t)
+ {
+ /* Tunnel was ignored/destroyed, probably service didn't get it yet */
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " ignored!\n");
+ return;
+ }
+ type = ntohs (payload->type);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " payload type %u\n", 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, t, &t->ctx, payload))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "callback caused disconnection\n");
+ GNUNET_MESH_tunnel_destroy (t);
+ return;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "callback completed successfully\n");
+ }
+ }
+ }
+}
+
+
+/**
+ * Process a local ACK message, enabling the client to send
+ * more data to the service.
+ *
+ * @param h Mesh handle.
+ * @param message Message itself.
+ */
+static void
+process_ack (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_LocalAck *msg;
+ struct GNUNET_MESH_Tunnel *t;
+ MESH_TunnelNumber tid;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK!\n");
+ h->acks_recv++;
+ msg = (struct GNUNET_MESH_LocalAck *) message;
+ tid = ntohl (msg->tunnel_id);
+ t = retrieve_tunnel (h, tid);
+ if (NULL == t)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING, "ACK on unknown tunnel %X\n", tid);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X!\n", t->tid);
+ t->allow_send = GNUNET_YES;
+ if (NULL == h->th && 0 < t->packet_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " tmt rdy was NULL, requesting!\n");
+ h->th =
+ GNUNET_CLIENT_notify_transmit_ready (h->client, t->packet_size,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_YES, &send_callback, h);
+ }
+}
+
+
+/**
+ * Process a local reply about info on all tunnels, pass info to the user.
+ *
+ * @param h Mesh handle.
+ * @param message Message itself.
+ */
+static void
+process_get_tunnels (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_LocalMonitor *msg;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Get Tunnels messasge received\n");
+
+ if (NULL == h->tunnels_cb)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
+ return;
+ }
+
+ msg = (struct GNUNET_MESH_LocalMonitor *) message;
+ if (ntohs (message->size) !=
+ (sizeof (struct GNUNET_MESH_LocalMonitor) +
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ GNUNET_break_op (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Get tunnels message: size %hu - expected %u\n",
+ ntohs (message->size),
+ sizeof (struct GNUNET_MESH_LocalMonitor));
+ return;
+ }
+ h->tunnels_cb (h->tunnels_cls,
+ ntohl (msg->tunnel_id),
+ &msg->owner,
+ &msg->destination);
+}
+
+
+
+/**
+ * Process a local monitor_tunnel reply, pass info to the user.
+ *
+ * @param h Mesh handle.
+ * @param message Message itself.
+ */
+static void
+process_show_tunnel (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GNUNET_MESH_LocalMonitor *msg;
+ size_t esize;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Show Tunnel messasge received\n");
+
+ if (NULL == h->tunnel_cb)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " ignored\n");
+ return;
+ }
+
+ /* Verify message sanity */
+ msg = (struct GNUNET_MESH_LocalMonitor *) message;
+ esize = sizeof (struct GNUNET_MESH_LocalMonitor);
+ if (ntohs (message->size) != esize)
+ {
+ GNUNET_break_op (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Show tunnel message: size %hu - expected %u\n",
+ ntohs (message->size),
+ esize);
+
+ h->tunnel_cb (h->tunnel_cls, NULL, NULL);
+ h->tunnel_cb = NULL;
+ h->tunnel_cls = NULL;
+
+ return;
+ }
+
+ h->tunnel_cb (h->tunnel_cls,
+ &msg->destination,
+ &msg->owner);
+}
+
+
+/**
+ * Function to process all messages received from the service
+ *
+ * @param cls closure
+ * @param msg message received, NULL on timeout or fatal error
+ */
+static void
+msg_received (void *cls, const struct GNUNET_MessageHeader *msg)
+{
+ struct GNUNET_MESH_Handle *h = cls;
+ uint16_t type;
+
+ if (msg == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Mesh service disconnected, reconnecting\n", h);
+ reconnect (h);
+ return;
+ }
+ type = ntohs (msg->type);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Received a message: %s\n",
+ GNUNET_MESH_DEBUG_M2S (type));
+ switch (type)
+ {
+ /* Notify of a new incoming tunnel */
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE:
+ process_tunnel_created (h, (struct GNUNET_MESH_TunnelMessage *) msg);
+ break;
+ /* Notify of a tunnel disconnection */
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY:
+ process_tunnel_destroy (h, (struct GNUNET_MESH_TunnelMessage *) msg);
+ break;
+ /* Notify of a new data packet in the tunnel */
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA:
+ process_incoming_data (h, msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
+ process_ack (h, msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS:
+ process_get_tunnels (h, msg);
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL:
+ process_show_tunnel (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",
+ GNUNET_MESH_DEBUG_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");
+ }
+}
+
+
+/******************************************************************************/
+/************************ 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.
+ *
+ * @param cls closure, the mesh 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)
+{
+ struct GNUNET_MESH_Handle *h = cls;
+ struct GNUNET_MESH_TransmitHandle *th;
+ struct GNUNET_MESH_TransmitHandle *next;
+ struct GNUNET_MESH_Tunnel *t;
+ 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))
+ {
+ t = th->tunnel;
+ if (GNUNET_YES == th_is_payload (th))
+ {
+ struct GNUNET_MESH_LocalData *dmsg;
+ struct GNUNET_MessageHeader *mh;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload\n");
+ if (GNUNET_NO == t->allow_send)
+ {
+ /* This tunnel is not ready to transmit yet, try next message */
+ next = th->next;
+ continue;
+ }
+ t->packet_size = 0;
+ GNUNET_assert (size >= th->size);
+ dmsg = (struct GNUNET_MESH_LocalData *) cbuf;
+ mh = (struct GNUNET_MessageHeader *) &dmsg[1];
+ psize = th->notify (th->notify_cls,
+ size - sizeof (struct GNUNET_MESH_LocalData),
+ mh);
+ if (psize > 0)
+ {
+ psize += sizeof (struct GNUNET_MESH_LocalData);
+ GNUNET_assert (size >= psize);
+ dmsg->header.size = htons (psize);
+ dmsg->tid = htonl (t->tid);
+ dmsg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "# payload type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ t->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, "# mesh internal traffic, type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ memcpy (cbuf, &th[1], th->size);
+ psize = th->size;
+ }
+ 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)
+ {
+ 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);
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "# Send packet() END\n");
+ return tsize;
+}
+
+
+/**
+ * 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.
+ *
+ * @param h mesh handle
+ * @param msg message to transmit
+ * @param tunnel tunnel this send is related to (NULL if N/A)
+ */
+static void
+send_packet (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *msg,
+ struct GNUNET_MESH_Tunnel *tunnel)
+{
+ struct GNUNET_MESH_TransmitHandle *th;
+ size_t msize;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " Sending message to service: %s\n",
+ GNUNET_MESH_DEBUG_M2S(ntohs(msg->type)));
+ msize = ntohs (msg->size);
+ th = GNUNET_malloc (sizeof (struct GNUNET_MESH_TransmitHandle) + msize);
+ th->timeout = GNUNET_TIME_UNIT_FOREVER_ABS;
+ th->size = msize;
+ th->tunnel = tunnel;
+ 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_MESH_Handle *
+GNUNET_MESH_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, void *cls,
+ GNUNET_MESH_InboundTunnelNotificationHandler new_tunnel,
+ GNUNET_MESH_TunnelEndHandler cleaner,
+ const struct GNUNET_MESH_MessageHandler *handlers,
+ const uint32_t *ports)
+{
+ struct GNUNET_MESH_Handle *h;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_MESH_connect()\n");
+ h = GNUNET_malloc (sizeof (struct GNUNET_MESH_Handle));
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " addr %p\n", h);
+ h->cfg = cfg;
+ h->new_tunnel = new_tunnel;
+ h->cleaner = cleaner;
+ h->client = GNUNET_CLIENT_connect ("mesh", 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_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
+ h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+
+ if (NULL != ports && ports[0] != 0 && NULL == new_tunnel)
+ {
+ GNUNET_break (0);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "no new tunnel handler given, ports parameter is useless!!\n");
+ }
+ if ((NULL == ports || ports[0] == 0) && NULL != new_tunnel)
+ {
+ GNUNET_break (0);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "no ports given, new tunnel handler will never be called!!\n");
+ }
+ /* 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_MESH_connect() END\n");
+ return h;
+}
+
+
+void
+GNUNET_MESH_disconnect (struct GNUNET_MESH_Handle *handle)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ struct GNUNET_MESH_Tunnel *aux;
+ struct GNUNET_MESH_TransmitHandle *th;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH DISCONNECT\n");
+
+#if DEBUG_ACK
+ LOG (GNUNET_ERROR_TYPE_INFO, "Sent %d ACKs\n", handle->acks_sent);
+ LOG (GNUNET_ERROR_TYPE_INFO, "Recv %d ACKs\n\n", handle->acks_recv);
+#endif
+
+ t = handle->tunnels_head;
+ while (NULL != t)
+ {
+ aux = t->next;
+ if (t->tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ {
+ GNUNET_break (0);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X not destroyed\n", t->tid);
+ }
+ destroy_tunnel (t, GNUNET_YES);
+ t = aux;
+ }
+ while ( (th = handle->th_head) != NULL)
+ {
+ 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_MESH_LOCAL_CONNECT:
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY:
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS:
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL:
+ break;
+ default:
+ GNUNET_break (0);
+ LOG (GNUNET_ERROR_TYPE_ERROR, "unexpected msg %u\n",
+ ntohs(msg->type));
+ }
+
+ 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)
+ {
+ GNUNET_CLIENT_disconnect (handle->client);
+ handle->client = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != handle->reconnect_task)
+ {
+ GNUNET_SCHEDULER_cancel(handle->reconnect_task);
+ handle->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ GNUNET_free (handle);
+}
+
+
+/**
+ * Create a new tunnel (we're initiator and will be allowed to add/remove peers
+ * and to broadcast).
+ *
+ * @param h mesh handle
+ * @param tunnel_ctx client's tunnel context to associate with the tunnel
+ * @param peer peer identity the tunnel should go to
+ * @param port Port number.
+ * @param nobuffer Flag for disabling buffering on relay nodes.
+ * @param reliable Flag for end-to-end reliability.
+ *
+ * @return handle to the tunnel
+ */
+struct GNUNET_MESH_Tunnel *
+GNUNET_MESH_tunnel_create (struct GNUNET_MESH_Handle *h,
+ void *tunnel_ctx,
+ const struct GNUNET_PeerIdentity *peer,
+ uint32_t port,
+ int nobuffer,
+ int reliable)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ struct GNUNET_MESH_TunnelMessage msg;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Creating new tunnel to %s:%u\n",
+ GNUNET_i2s (peer), port);
+ t = create_tunnel (h, 0);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " at %p\n", t);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " number %X\n", t->tid);
+ t->ctx = tunnel_ctx;
+ t->peer = GNUNET_PEER_intern (peer);
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ msg.tunnel_id = htonl (t->tid);
+ msg.port = htonl (port);
+ msg.peer = *peer;
+ msg.opt = 0;
+ if (GNUNET_YES == reliable)
+ msg.opt |= GNUNET_MESH_OPTION_RELIABLE;
+ if (GNUNET_YES == nobuffer)
+ msg.opt |= GNUNET_MESH_OPTION_NOBUFFER;
+ msg.opt = htonl (msg.opt);
+ t->allow_send = 0;
+ send_packet (h, &msg.header, t);
+ return t;
+}
+
+
+void
+GNUNET_MESH_tunnel_destroy (struct GNUNET_MESH_Tunnel *tunnel)
+{
+ struct GNUNET_MESH_Handle *h;
+ struct GNUNET_MESH_TunnelMessage msg;
+ struct GNUNET_MESH_TransmitHandle *th;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Destroying tunnel\n");
+ h = tunnel->mesh;
+
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ msg.tunnel_id = htonl (tunnel->tid);
+ memset (&msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
+ msg.port = 0;
+ msg.opt = 0;
+ th = h->th_head;
+ while (th != NULL)
+ {
+ struct GNUNET_MESH_TransmitHandle *aux;
+ if (th->tunnel == tunnel)
+ {
+ 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;
+ }
+
+ destroy_tunnel (tunnel, GNUNET_YES);
+ send_packet (h, &msg.header, NULL);
+}
+
+
+/**
+ * Get information about a tunnel.
+ *
+ * @param tunnel Tunnel handle.
+ * @param option Query (GNUNET_MESH_OPTION_*).
+ * @param ... dependant on option, currently not used
+ *
+ * @return Union with an answer to the query.
+ */
+const union MeshTunnelInfo *
+GNUNET_MESH_tunnel_get_info (struct GNUNET_MESH_Tunnel *tunnel,
+ enum MeshTunnelOption option, ...)
+{
+ const union MeshTunnelInfo *ret;
+
+ switch (option)
+ {
+ case GNUNET_MESH_OPTION_NOBUFFER:
+ ret = (const union MeshTunnelInfo *) &tunnel->nobuffer;
+ break;
+ case GNUNET_MESH_OPTION_RELIABLE:
+ ret = (const union MeshTunnelInfo *) &tunnel->reliable;
+ break;
+ case GNUNET_MESH_OPTION_OOORDER:
+ ret = (const union MeshTunnelInfo *) &tunnel->ooorder;
+ break;
+ case GNUNET_MESH_OPTION_PEER:
+ ret = (const union MeshTunnelInfo *) &tunnel->peer;
+ break;
+ default:
+ GNUNET_break (0);
+ return NULL;
+ }
+
+ return ret;
+}
+
+struct GNUNET_MESH_TransmitHandle *
+GNUNET_MESH_notify_transmit_ready (struct GNUNET_MESH_Tunnel *tunnel, int cork,
+ struct GNUNET_TIME_Relative maxdelay,
+ size_t notify_size,
+ GNUNET_CONNECTION_TransmitReadyNotify
notify,
+ void *notify_cls)
+{
+ struct GNUNET_MESH_TransmitHandle *th;
+
+ GNUNET_assert (NULL != tunnel);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH NOTIFY TRANSMIT READY\n");
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tunnel->tid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " allow_send %d\n", tunnel->allow_send);
+ if (tunnel->tid >= GNUNET_MESH_LOCAL_TUNNEL_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 == tunnel->packet_size); // Only one data packet allowed
+ th = GNUNET_malloc (sizeof (struct GNUNET_MESH_TransmitHandle));
+ th->tunnel = tunnel;
+ th->timeout = GNUNET_TIME_relative_to_absolute (maxdelay);
+ th->size = notify_size + sizeof (struct GNUNET_MESH_LocalData);
+ tunnel->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 (tunnel->mesh, th);
+ if (NULL != tunnel->mesh->th)
+ return th;
+ if (GNUNET_NO == tunnel->allow_send)
+ return th;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " call client notify tmt rdy\n");
+ tunnel->mesh->th =
+ GNUNET_CLIENT_notify_transmit_ready (tunnel->mesh->client, th->size,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_YES, &send_callback,
+ tunnel->mesh);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "MESH NOTIFY TRANSMIT READY END\n");
+ return th;
+}
+
+
+void
+GNUNET_MESH_notify_transmit_ready_cancel (struct GNUNET_MESH_TransmitHandle
*th)
+{
+ struct GNUNET_MESH_Handle *mesh;
+
+ th->tunnel->packet_size = 0;
+ mesh = th->tunnel->mesh;
+ if (th->timeout_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (th->timeout_task);
+ GNUNET_CONTAINER_DLL_remove (mesh->th_head, mesh->th_tail, th);
+ GNUNET_free (th);
+ if ((0 == message_ready_size (mesh)) && (NULL != mesh->th))
+ {
+ /* queue empty, no point in asking for transmission */
+ GNUNET_CLIENT_notify_transmit_ready_cancel (mesh->th);
+ mesh->th = NULL;
+ }
+}
+
+void
+GNUNET_MESH_receive_done (struct GNUNET_MESH_Tunnel *tunnel)
+{
+ send_ack (tunnel);
+}
+
+
+/**
+ * Request information about the running mesh peer.
+ * The callback will be called for every tunnel known to the service,
+ * listing all active peers that blong to the tunnel.
+ *
+ * If called again on the same handle, it will overwrite the previous
+ * callback and cls. To retrieve the cls, monitor_cancel must be
+ * called first.
+ *
+ * WARNING: unstable API, likely to change in the future!
+ *
+ * @param h Handle to the mesh peer.
+ * @param callback Function to call with the requested data.
+ * @param callback_cls Closure for @c callback.
+ */
+void
+GNUNET_MESH_get_tunnels (struct GNUNET_MESH_Handle *h,
+ GNUNET_MESH_TunnelsCB callback,
+ void *callback_cls)
+{
+ struct GNUNET_MessageHeader msg;
+
+ msg.size = htons (sizeof (msg));
+ msg.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
+ send_packet (h, &msg, NULL);
+ h->tunnels_cb = callback;
+ h->tunnels_cls = callback_cls;
+
+ return;
+}
+
+
+/**
+ * Cancel a monitor request. The monitor callback will not be called.
+ *
+ * @param h Mesh handle.
+ *
+ * @return Closure given to GNUNET_MESH_monitor, if any.
+ */
+void *
+GNUNET_MESH_get_tunnels_cancel (struct GNUNET_MESH_Handle *h)
+{
+ void *cls;
+
+ cls = h->tunnels_cls;
+ h->tunnels_cb = NULL;
+ h->tunnels_cls = NULL;
+ return cls;
+}
+
+
+/**
+ * Request information about a specific tunnel of the running mesh peer.
+ *
+ * WARNING: unstable API, likely to change in the future!
+ * FIXME Add destination option.
+ *
+ * @param h Handle to the mesh peer.
+ * @param initiator ID of the owner of the tunnel.
+ * @param tunnel_number Tunnel number.
+ * @param callback Function to call with the requested data.
+ * @param callback_cls Closure for @c callback.
+ */
+void
+GNUNET_MESH_show_tunnel (struct GNUNET_MESH_Handle *h,
+ struct GNUNET_PeerIdentity *initiator,
+ unsigned int tunnel_number,
+ GNUNET_MESH_TunnelCB callback,
+ void *callback_cls)
+{
+ struct GNUNET_MESH_LocalMonitor msg;
+
+ msg.header.size = htons (sizeof (msg));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL);
+ msg.owner = *initiator;
+ msg.tunnel_id = htonl (tunnel_number);
+ msg.reserved = 0;
+ send_packet (h, &msg.header, NULL);
+ h->tunnel_cb = callback;
+ h->tunnel_cls = callback_cls;
+
+ return;
+}
+
+
+/**
+ * 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
+mesh_mq_ntr (void *cls, size_t size,
+ void *buf)
+{
+ struct GNUNET_MQ_Handle *mq = cls;
+ struct MeshMQState *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);
+ 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
+mesh_mq_send_impl (struct GNUNET_MQ_Handle *mq,
+ const struct GNUNET_MessageHeader *msg, void *impl_state)
+{
+ struct MeshMQState *state = impl_state;
+
+ GNUNET_assert (NULL == state->th);
+ GNUNET_MQ_impl_send_commit (mq);
+ state->th =
+ GNUNET_MESH_notify_transmit_ready (state->tunnel,
+ /* FIXME: add option for corking */
+ GNUNET_NO,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ ntohs (msg->size),
+ mesh_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
+mesh_mq_destroy_impl (struct GNUNET_MQ_Handle *mq, void *impl_state)
+{
+ struct MeshMQState *state = impl_state;
+
+ if (NULL != state->th)
+ GNUNET_MESH_notify_transmit_ready_cancel (state->th);
+
+ GNUNET_free (state);
+}
+
+
+/**
+ * Create a message queue for a mesh tunnel.
+ * The message queue can only be used to transmit messages,
+ * not to receive them.
+ *
+ * @param tunnel the tunnel to create the message qeue for
+ * @return a message queue to messages over the tunnel
+ */
+struct GNUNET_MQ_Handle *
+GNUNET_MESH_mq_create (struct GNUNET_MESH_Tunnel *tunnel)
+{
+ struct GNUNET_MQ_Handle *mq;
+ struct MeshMQState *state;
+
+ state = GNUNET_new (struct MeshMQState);
+ state->tunnel = tunnel;
+
+ mq = GNUNET_MQ_queue_for_callbacks (mesh_mq_send_impl,
+ mesh_mq_destroy_impl,
+ NULL, /* FIXME: cancel impl. */
+ state,
+ NULL, /* no msg handlers */
+ NULL, /* no err handlers */
+ NULL); /* no handler cls */
+ return mq;
+}
+
Added: gnunet/src/mesh/mesh_protocol_enc.h
===================================================================
--- gnunet/src/mesh/mesh_protocol_enc.h (rev 0)
+++ gnunet/src/mesh/mesh_protocol_enc.h 2013-07-23 14:03:50 UTC (rev 28270)
@@ -0,0 +1,337 @@
+/*
+ This file is part of GNUnet.
+ (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
+
+ 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.
+*/
+
+/**
+ * @author Bartlomiej Polot
+ * @file mesh/mesh_protocol_enc.h
+ */
+
+#ifndef MESH_PROTOCOL_ENC_H_
+#define MESH_PROTOCOL_ENC_H_
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0
+ /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+/******************************************************************************/
+/******************** MESH NETWORK MESSAGES
**************************/
+/******************************************************************************/
+
+GNUNET_NETWORK_STRUCT_BEGIN
+
+/**
+ * Message for mesh path creation.
+ */
+struct GNUNET_MESH_CreateTunnel
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE
+ *
+ * Size: sizeof(struct GNUNET_MESH_ManipulatePath) +
+ * path_length * sizeof (struct GNUNET_PeerIdentity)
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * Global id of the tunnel this path belongs to,
+ * unique in conjunction with the origin.
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * Tunnel options (GNUNET_MESH_OPTION_*).
+ */
+ uint32_t opt GNUNET_PACKED;
+
+ /**
+ * Destination port.
+ */
+ uint32_t port GNUNET_PACKED;
+
+ /**
+ * TODO do not add the first hop
+ * path_length structs defining the *whole* path from the origin [0] to the
+ * final destination [path_length-1].
+ */
+ /* struct GNUNET_PeerIdentity peers[path_length]; */
+};
+
+
+/**
+ * Message for mesh data traffic.
+ */
+struct GNUNET_MESH_Data
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_UNICAST,
+ * GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * Number of hops to live
+ */
+ uint32_t ttl GNUNET_PACKED;
+
+ /**
+ * ID of the packet
+ */
+ uint32_t pid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /**
+ * Unique ID of the payload message
+ */
+ uint32_t mid GNUNET_PACKED;
+
+ /**
+ * Payload follows
+ */
+};
+
+
+/**
+ * Message to acknowledge end-to-end data.
+ */
+struct GNUNET_MESH_DataACK
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_DATA_ACK
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /**
+ * Bitfield of already-received newer messages
+ * pid + 1 @ LSB
+ * pid + 64 @ MSB
+ */
+ uint64_t futures GNUNET_PACKED;
+
+ /**
+ * Last message ID received.
+ */
+ uint32_t mid GNUNET_PACKED;
+};
+
+
+/**
+ * Message to acknowledge mesh data traffic.
+ */
+struct GNUNET_MESH_ACK
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_ACK
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /**
+ * Maximum packet ID authorized.
+ */
+ uint32_t pid GNUNET_PACKED;
+};
+
+
+/**
+ * Message to query a peer about its Flow Control status regarding a tunnel.
+ */
+struct GNUNET_MESH_Poll
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_POLL
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /**
+ * Last packet sent.
+ */
+ uint32_t pid GNUNET_PACKED;
+};
+
+/**
+ * Message for ack'ing a path
+ */
+struct GNUNET_MESH_PathACK
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_PATH_ACK
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /**
+ * ID of the endpoint
+ */
+ struct GNUNET_PeerIdentity peer_id;
+
+ /**
+ * Initial ACK value for payload.
+ */
+ uint32_t ack GNUNET_PACKED;
+
+ /* TODO: signature */
+};
+
+
+/**
+ * Message for notifying a disconnection in a path
+ */
+struct GNUNET_MESH_PathBroken
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /**
+ * ID of the endpoint
+ */
+ struct GNUNET_PeerIdentity peer1;
+
+ /**
+ * ID of the endpoint
+ */
+ struct GNUNET_PeerIdentity peer2;
+
+ /* TODO: signature */
+};
+
+
+/**
+ * Message to destroy a tunnel
+ */
+struct GNUNET_MESH_TunnelDestroy
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+
+ /* TODO: signature */
+};
+
+
+/**
+ * Message to destroy a tunnel
+ */
+struct GNUNET_MESH_TunnelKeepAlive
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_MESH_PATH_(FWD|BCK)_KEEPALIVE
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * TID of the tunnel
+ */
+ uint32_t tid GNUNET_PACKED;
+
+ /**
+ * OID of the tunnel
+ */
+ struct GNUNET_PeerIdentity oid;
+};
+
+
+
+GNUNET_NETWORK_STRUCT_END
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/* ifndef MESH_PROTOCOL_H */
+#endif
+/* end of mesh_protocol.h */
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