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[GNUnet-SVN] r27046 - gnunet/src/mesh
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From: |
gnunet |
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Subject: |
[GNUnet-SVN] r27046 - gnunet/src/mesh |
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Date: |
Tue, 7 May 2013 13:36:16 +0200 |
Author: bartpolot
Date: 2013-05-07 13:36:16 +0200 (Tue, 07 May 2013)
New Revision: 27046
Added:
gnunet/src/mesh/mesh2_api.c
Modified:
gnunet/src/mesh/Makefile.am
Log:
Initial mesh2 api import
Modified: gnunet/src/mesh/Makefile.am
===================================================================
--- gnunet/src/mesh/Makefile.am 2013-05-07 10:54:03 UTC (rev 27045)
+++ gnunet/src/mesh/Makefile.am 2013-05-07 11:36:16 UTC (rev 27046)
@@ -20,14 +20,19 @@
AM_CLFAGS = -g
+if HAVE_EXPERIMENTAL
+ EXP_LIB = libgnunetmesh2.la
+ EXP_LIBEXEC = gnunet-service-mesh-new
+endif
+
libexec_PROGRAMS = \
- gnunet-service-mesh gnunet-service-mesh-new
+ gnunet-service-mesh $(EXP_LIBEXEC)
bin_PROGRAMS = \
gnunet-mesh
lib_LTLIBRARIES = \
- libgnunetmesh.la
+ libgnunetmesh.la $(EXP_LIB)
plugin_LTLIBRARIES = \
libgnunet_plugin_block_mesh.la
@@ -53,6 +58,17 @@
$(GN_LIB_LDFLAGS) $(WINFLAGS) \
-version-info 2:1:1
+libgnunetmesh2_la_SOURCES = \
+ mesh2_api.c mesh_common.c
+libgnunetmesh2_la_LIBADD = \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(XLIB) \
+ $(LTLIBINTL)
+libgnunetmesh2_la_LDFLAGS = \
+ $(GN_LIB_LDFLAGS) $(WINFLAGS) \
+ -version-info 2:2:1
+
+
gnunet_service_mesh_SOURCES = \
gnunet-service-mesh.c \
mesh_tunnel_tree.c mesh_tunnel_tree.h \
Added: gnunet/src/mesh/mesh2_api.c
===================================================================
--- gnunet/src/mesh/mesh2_api.c (rev 0)
+++ gnunet/src/mesh/mesh2_api.c 2013-05-07 11:36:16 UTC (rev 27046)
@@ -0,0 +1,2329 @@
+/*
+ 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/mesh2_api.c
+ * @brief mesh2 api: client implementation of new mesh service
+ * @author Bartlomiej Polot
+ *
+ * STRUCTURE:
+ * - DATA STRUCTURES
+ * - DECLARATIONS
+ * - AUXILIARY FUNCTIONS
+ * - RECEIVE HANDLERS
+ * - SEND FUNCTIONS
+ * - API CALL DEFINITIONS
+ *
+ * TODO: add regex to reconnect
+ */
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_client_lib.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_peer_lib.h"
+#include "gnunet_mesh2_service.h"
+#include "mesh.h"
+#include "mesh_protocol.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "mesh2-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;
+
+ /**
+ * Target of the message, 0 for multicast. This field
+ * is only valid if 'notify' is non-NULL.
+ */
+ GNUNET_PEER_Id target;
+
+ /**
+ * 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;
+
+ /**
+ * 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;
+
+ /**
+ * Number of handlers in the handlers array.
+ */
+ unsigned int n_handlers;
+
+ /**
+ * Number of applications in the applications array.
+ */
+ unsigned int n_applications;
+
+ /**
+ * 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;
+
+ /**
+ * All the peer in the tunnel so far.
+ */
+ struct GNUNET_PeerIdentity *peers;
+
+ /**
+ * How many peers we have in this tunnel so far.
+ */
+ unsigned int tunnel_npeers;
+
+#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;
+
+ /**
+ * Owner of the tunnel. (1 if the tunnel is a local client).
+ */
+ GNUNET_PEER_Id owner;
+
+ /**
+ * Destination of the tunnel.
+ */
+ GNUNET_PEER_Id destination;
+
+ /**
+ * Next hop for the tunnel.
+ */
+ GNUNET_PEER_Id next_hop;
+
+ /**
+ * Previous hop for the tunnel.
+ */
+ GNUNET_PEER_Id prev_hop;
+
+ /**
+ * Any data the caller wants to put in here
+ */
+ void *ctx;
+
+ /**
+ * Size of packet queued in this tunnel
+ */
+ unsigned int packet_size;
+
+ /**
+ * Number of applications requested this tunnel
+ */
+ unsigned int napps;
+
+ /**
+ * Is the tunnel throttled to the slowest peer?
+ */
+ int speed_min;
+
+ /**
+ * Is the tunnel allowed to buffer?
+ */
+ int buffering;
+
+ /**
+ * Next packet ID to send.
+ */
+ uint32_t next_send_pid;
+
+ /**
+ * Maximum allowed PID to send (ACK recevied).
+ */
+ uint32_t max_send_pid;
+
+ /**
+ * Last pid received from the service.
+ */
+ uint32_t last_recv_pid;
+
+ /**
+ * Which ACK value have we last sent to the service?
+ */
+ uint32_t max_recv_pid;
+};
+
+
+/******************************************************************************/
+/*********************** 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_NO == GMC_is_pid_bigger(t->next_send_pid, t->max_send_pid))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " message payload ok (%u <= %u)\n",
+ t->next_send_pid, t->max_send_pid);
+ 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->max_send_pid = INITIAL_WINDOW_SIZE - 1;
+ t->last_recv_pid = (uint32_t) -1;
+ t->buffering = GNUNET_YES;
+ 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_PeerIdentity pi;
+ struct GNUNET_MESH_TransmitHandle *th;
+ struct GNUNET_MESH_TransmitHandle *next;
+ unsigned int i;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "destroy_tunnel %X\n", t->tid);
+
+ if (NULL == t)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ h = t->mesh;
+
+ /* free all peer's ID */
+ GNUNET_CONTAINER_DLL_remove (h->tunnels_head, h->tunnels_tail, t);
+ GNUNET_PEER_change_rc (t->owner, -1);
+ GNUNET_PEER_change_rc (t->destination, -1);
+ GNUNET_PEER_change_rc (t->next_hop, -1);
+ GNUNET_PEER_change_rc (t->prev_hop, -1);
+
+ /* signal tunnel destruction */
+ if ( (NULL != h->cleaner) && (0 != t->owner) && (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 (t->npeers > 0)
+ GNUNET_free (t->peers);
+ if (0 != t->owner)
+ GNUNET_PEER_change_rc (t->owner, -1);
+ if (0 != t->napps && t->apps)
+ GNUNET_free (t->apps);
+ GNUNET_free (t);
+ return;
+}
+
+
+/**
+ * Get the peer descriptor for the peer with id from the given tunnel
+ * @param t Tunnel handle
+ * @param id Short form ID of the wanted peer
+ * @return handle to the requested peer or NULL if not found
+ */
+static struct GNUNET_MESH_Peer *
+retrieve_peer (struct GNUNET_MESH_Tunnel *t, GNUNET_PEER_Id id)
+{
+ unsigned int i;
+
+ for (i = 0; i < t->npeers; i++)
+ if (t->peers[i]->id == id)
+ return t->peers[i];
+ return NULL;
+}
+
+
+/**
+ * Add a peer into a tunnel
+ * @param t Tunnel handle
+ * @param pi Full ID of the new peer
+ * @return handle to the newly created peer
+ */
+static struct GNUNET_MESH_Peer *
+add_peer_to_tunnel (struct GNUNET_MESH_Tunnel *t,
+ const struct GNUNET_PeerIdentity *pi)
+{
+ struct GNUNET_MESH_Peer *p;
+ GNUNET_PEER_Id id;
+
+ if (0 != t->owner)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ id = GNUNET_PEER_intern (pi);
+
+ p = GNUNET_malloc (sizeof (struct GNUNET_MESH_Peer));
+ p->id = id;
+ p->t = t;
+ GNUNET_array_append (t->peers, t->npeers, p);
+ return p;
+}
+
+
+/**
+ * Remove a peer from a tunnel
+ * @param p Peer handle
+ */
+static void
+remove_peer_from_tunnel (struct GNUNET_MESH_Peer *p)
+{
+ unsigned int i;
+
+ for (i = 0; i < p->t->npeers; i++)
+ {
+ if (p->t->peers[i] == p)
+ break;
+ }
+ if (i == p->t->npeers)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ p->t->peers[i] = p->t->peers[p->t->npeers - 1];
+ GNUNET_array_grow (p->t->peers, p->t->npeers, p->t->npeers - 1);
+}
+
+
+/**
+ * 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 h Mesh handle.
+ * @param t Tunnel on which to send the ACK.
+ */
+static void
+send_ack (struct GNUNET_MESH_Handle *h, struct GNUNET_MESH_Tunnel *t)
+{
+ struct GNUNET_MESH_LocalAck msg;
+ uint32_t delta;
+
+ delta = t->max_recv_pid - t->last_recv_pid;
+ if (delta > ACK_THRESHOLD)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Not sending ACK on tunnel %X: ACK: %u, PID: %u, buffer %u\n",
+ t->tid, t->max_recv_pid, t->last_recv_pid, delta);
+ return;
+ }
+ if (GNUNET_YES == t->buffering)
+ t->max_recv_pid = t->last_recv_pid + INITIAL_WINDOW_SIZE;
+ else
+ t->max_recv_pid = t->last_recv_pid + 1;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending ACK on tunnel %X: %u\n",
+ t->tid, t->max_recv_pid);
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
+ msg.header.size = htons (sizeof (msg));
+ msg.tunnel_id = htonl (t->tid);
+ msg.max_pid = htonl (t->max_recv_pid);
+
+#if DEBUG_ACK
+ t->mesh->acks_sent++;
+#endif
+
+ send_packet (h, &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_handlers * sizeof (uint16_t);
+ {
+ char buf[size] GNUNET_ALIGN;
+ struct GNUNET_MESH_ClientConnect *msg;
+ uint16_t napps;
+ uint16_t *types;
+ uint16_t ntypes;
+
+ /* build connection packet */
+ msg = (struct GNUNET_MESH_ClientConnect *) buf;
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT);
+ msg->header.size = htons (size);
+ types = (uint16_t *) & apps[napps];
+ for (ntypes = 0; ntypes < h->n_handlers; ntypes++)
+ {
+ types[ntypes] = htons (h->message_handlers[ntypes].type);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
+ h->message_handlers[ntypes].type);
+ }
+ msg->applications = htons (napps);
+ msg->types = htons (ntypes);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending %lu bytes long message %d types and %d apps\n",
+ ntohs (msg->header.size), ntypes, napps);
+ 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;
+ unsigned int i;
+
+ 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;
+ struct GNUNET_MESH_PeerControl pmsg;
+
+ 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->next_send_pid = 0;
+ t->max_send_pid = INITIAL_WINDOW_SIZE - 1;
+ t->last_recv_pid = (uint32_t) -1;
+ 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);
+ send_packet (h, &tmsg.header, t);
+
+ pmsg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
+ pmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
+ pmsg.tunnel_id = htonl (t->tid);
+
+ /* Reconnect all peers */
+ /* If the tunnel was "by type", dont connect individual peers */
+ for (i = 0; i < t->npeers && 0 == t->napps; i++)
+ {
+ GNUNET_PEER_resolve (t->peers[i]->id, &pmsg.peer);
+ if (NULL != t->disconnect_handler && t->peers[i]->connected)
+ t->disconnect_handler (t->cls, &pmsg.peer);
+ send_packet (t->mesh, &pmsg.header, t);
+ }
+ /* Reconnect all types, if any */
+ for (i = 0; i < t->napps; i++)
+ {
+ struct GNUNET_MESH_ConnectPeerByType msg;
+
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_ConnectPeerByType));
+ msg.header.type = htons
(GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE);
+ msg.tunnel_id = htonl (t->tid);
+ msg.type = htonl (t->apps[i]);
+ send_packet (t->mesh, &msg.header, t);
+ }
+ if (GNUNET_NO == t->buffering)
+ GNUNET_MESH_tunnel_buffer (t, GNUNET_NO);
+ if (GNUNET_YES == t->speed_min)
+ GNUNET_MESH_tunnel_speed_min (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_TunnelNotification *msg)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ MESH_TunnelNumber tid;
+
+ tid = ntohl (msg->tunnel_id);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating incoming tunnel %X\n", tid);
+ if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ if (NULL != h->new_tunnel)
+ {
+ struct GNUNET_ATS_Information atsi;
+
+ t = create_tunnel (h, tid);
+ t->owner = GNUNET_PEER_intern (&msg->peer);
+ t->npeers = 1;
+ t->peers = GNUNET_malloc (sizeof (struct GNUNET_MESH_Peer *));
+ t->peers[0] = GNUNET_malloc (sizeof (struct GNUNET_MESH_Peer));
+ t->peers[0]->t = t;
+ t->peers[0]->connected = 1;
+ t->peers[0]->id = t->owner;
+ GNUNET_PEER_change_rc (t->owner, 1);
+ t->mesh = h;
+ t->tid = tid;
+ if ((msg->opt & MESH_TUNNEL_OPT_NOBUFFER) != 0)
+ t->buffering = GNUNET_NO;
+ else
+ t->buffering = GNUNET_YES;
+ if ((msg->opt & MESH_TUNNEL_OPT_SPEED_MIN) != 0)
+ t->speed_min = GNUNET_YES;
+ atsi.type = 0;
+ atsi.value = 0;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " created tunnel %p\n", t);
+ t->ctx = h->new_tunnel (h->cls, t, &msg->peer, &atsi);
+ 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;
+
+ 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;
+
+ tid = ntohl (msg->tunnel_id);
+ t = retrieve_tunnel (h, tid);
+
+ if (NULL == t)
+ {
+ return;
+ }
+ if (0 == t->owner)
+ {
+ GNUNET_break (0);
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "tunnel %X destroyed\n", t->tid);
+ destroy_tunnel (t, GNUNET_YES);
+ return;
+}
+
+
+/**
+ * Process the new peer event and notify the upper level of it
+ *
+ * @param h The mesh handle
+ * @param msg A message with the details of the peer event
+ */
+static void
+process_peer_event (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MESH_PeerControl *msg)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ struct GNUNET_MESH_Peer *p;
+ struct GNUNET_ATS_Information atsi;
+ GNUNET_PEER_Id id;
+ uint16_t size;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "processig peer event\n");
+ size = ntohs (msg->header.size);
+ if (size != sizeof (struct GNUNET_MESH_PeerControl))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ t = retrieve_tunnel (h, ntohl (msg->tunnel_id));
+ if (NULL == t)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ id = GNUNET_PEER_search (&msg->peer);
+ if ((p = retrieve_peer (t, id)) == NULL)
+ p = add_peer_to_tunnel (t, &msg->peer);
+ if (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD == ntohs (msg->header.type))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "adding peer\n");
+ if (NULL != t->connect_handler)
+ {
+ atsi.type = 0;
+ atsi.value = 0;
+ t->connect_handler (t->cls, &msg->peer, &atsi);
+ }
+ p->connected = 1;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "removing peer\n");
+ if (NULL != t->disconnect_handler && p->connected)
+ {
+ t->disconnect_handler (t->cls, &msg->peer);
+ }
+ remove_peer_from_tunnel (p);
+ GNUNET_free (p);
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "processing peer event END\n");
+}
+
+
+/**
+ * Process the incoming data packets
+ *
+ * @param h The mesh handle
+ * @param message A message encapsulating the data
+ *
+ * @return GNUNET_YES if everything went fine
+ * GNUNET_NO if client closed connection (h no longer valid)
+ */
+static int
+process_incoming_data (struct GNUNET_MESH_Handle *h,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct GNUNET_MessageHeader *payload;
+ const struct GNUNET_MESH_MessageHandler *handler;
+ const struct GNUNET_PeerIdentity *peer;
+ struct GNUNET_MESH_Unicast *ucast;
+ struct GNUNET_MESH_Multicast *mcast;
+ struct GNUNET_MESH_ToOrigin *to_orig;
+ struct GNUNET_MESH_Tunnel *t;
+ unsigned int i;
+ uint32_t pid;
+ uint16_t type;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a data message!\n");
+ type = ntohs (message->type);
+ switch (type)
+ {
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ ucast = (struct GNUNET_MESH_Unicast *) message;
+
+ t = retrieve_tunnel (h, ntohl (ucast->tid));
+ payload = (struct GNUNET_MessageHeader *) &ucast[1];
+ peer = &ucast->oid;
+ pid = ntohl (ucast->pid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " ucast on tunnel %s [%X]\n",
+ GNUNET_i2s (peer), ntohl (ucast->tid));
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ mcast = (struct GNUNET_MESH_Multicast *) message;
+ t = retrieve_tunnel (h, ntohl (mcast->tid));
+ payload = (struct GNUNET_MessageHeader *) &mcast[1];
+ peer = &mcast->oid;
+ pid = ntohl (mcast->pid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " mcast on tunnel %s [%X]\n",
+ GNUNET_i2s (peer), ntohl (mcast->tid));
+ break;
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ to_orig = (struct GNUNET_MESH_ToOrigin *) message;
+ t = retrieve_tunnel (h, ntohl (to_orig->tid));
+ payload = (struct GNUNET_MessageHeader *) &to_orig[1];
+ peer = &to_orig->sender;
+ pid = ntohl (to_orig->pid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " torig on tunnel %s [%X]\n",
+ GNUNET_i2s (peer), ntohl (to_orig->tid));
+ break;
+ default:
+ GNUNET_break (0);
+ return GNUNET_YES;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " pid %u\n", pid);
+ if (NULL == t)
+ {
+ /* Tunnel was ignored/destroyed, probably service didn't get it yet */
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " ignored!\n");
+ return GNUNET_YES;
+ }
+ if (GNUNET_YES ==
+ GMC_is_pid_bigger(pid, t->max_recv_pid))
+ {
+ GNUNET_break (0);
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ " unauthorized message! (%u, max %u)\n",
+ pid, t->max_recv_pid);
+ // FIXME fc what now? accept? reject?
+ return GNUNET_YES;
+ }
+ t->last_recv_pid = pid;
+ type = ntohs (payload->type);
+ send_ack (h, t);
+ for (i = 0; i < h->n_handlers; i++)
+ {
+ handler = &h->message_handlers[i];
+ if (handler->type == type)
+ {
+ struct GNUNET_ATS_Information atsi;
+
+ atsi.type = 0;
+ atsi.value = 0;
+ if (GNUNET_OK !=
+ handler->callback (h->cls, t, &t->ctx, peer, payload, &atsi))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "callback caused disconnection\n");
+ GNUNET_MESH_disconnect (h);
+ return GNUNET_NO;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "callback completed successfully\n");
+ }
+ }
+ }
+ return GNUNET_YES;
+}
+
+
+/**
+ * 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;
+ uint32_t ack;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK!\n");
+ h->acks_recv++;
+ msg = (struct GNUNET_MESH_LocalAck *) message;
+
+ t = retrieve_tunnel (h, ntohl (msg->tunnel_id));
+
+ if (NULL == t)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "ACK on unknown tunnel %X\n",
+ ntohl (msg->tunnel_id));
+ return;
+ }
+ ack = ntohl (msg->max_pid);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X, ack %u!\n", t->tid, ack);
+ if (GNUNET_YES == GMC_is_pid_bigger(ack, t->max_send_pid))
+ t->max_send_pid = ack;
+ else
+ return;
+ if (NULL == h->th && 0 < t->packet_size)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " tmt rdy was NULL, requesting!\n", t->tid,
ack);
+ 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;
+ uint32_t npeers;
+
+ 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;
+ npeers = ntohl (msg->npeers);
+ if (ntohs (message->size) !=
+ (sizeof (struct GNUNET_MESH_LocalMonitor) +
+ npeers * sizeof (struct GNUNET_PeerIdentity)))
+ {
+ GNUNET_break_op (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Get tunnels message: size %hu - expected %u (%u peers)\n",
+ ntohs (message->size),
+ sizeof (struct GNUNET_MESH_LocalMonitor) +
+ npeers * sizeof (struct GNUNET_PeerIdentity),
+ npeers);
+ return;
+ }
+ h->tunnels_cb (h->tunnels_cls,
+ &msg->owner,
+ ntohl (msg->tunnel_id),
+ (struct GNUNET_PeerIdentity *) &msg[1],
+ npeers);
+}
+
+
+
+/**
+ * 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;
+ struct GNUNET_PeerIdentity *new_peers;
+ uint32_t *new_parents;
+ size_t esize;
+ uint32_t npeers;
+ unsigned int i;
+
+ 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;
+ npeers = ntohl (msg->npeers);
+ esize = sizeof (struct GNUNET_MESH_LocalMonitor);
+ esize += npeers * (sizeof (struct GNUNET_PeerIdentity) + sizeof (uint32_t));
+ if (ntohs (message->size) != esize)
+ {
+ GNUNET_break_op (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Show tunnel message: size %hu - expected %u (%u peers)\n",
+ ntohs (message->size),
+ esize,
+ npeers);
+
+ h->tunnel_cb (h->tunnel_cls, NULL, NULL);
+ h->tunnel_cb = NULL;
+ h->tunnel_cls = NULL;
+ h->tunnel_npeers = 0;
+ GNUNET_free_non_null (h->peers);
+ h->peers = NULL;
+
+ return;
+ }
+
+ new_peers = (struct GNUNET_PeerIdentity *) &msg[1];
+ new_parents = (uint32_t *) &new_peers[npeers];
+
+ h->peers = GNUNET_realloc (h->peers, h->tunnel_npeers + npeers);
+ memcpy (&h->peers[h->tunnel_npeers],
+ new_peers,
+ npeers * sizeof (struct GNUNET_PeerIdentity));
+ h->tunnel_npeers += npeers;
+ for (i = 0; i < npeers; i++)
+ h->tunnel_cb (h->tunnel_cls,
+ &new_peers[i],
+ &h->peers[new_parents[i]]);
+}
+
+
+/**
+ * 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;
+
+ if (msg == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Mesh service disconnected, reconnecting\n", h);
+ reconnect (h);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (msg->type)));
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Received a message: %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (msg->type)));
+ switch (ntohs (msg->type))
+ {
+ /* Notify of a new incoming tunnel */
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE:
+ process_tunnel_created (h, (struct GNUNET_MESH_TunnelNotification *) 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 peer or a peer disconnect in the tunnel */
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD:
+ case GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL:
+ process_peer_event (h, (struct GNUNET_MESH_PeerControl *) msg);
+ break;
+ /* Notify of a new data packet in the tunnel */
+ case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
+ case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
+ case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
+ if (GNUNET_NO == process_incoming_data (h, msg))
+ return;
+ 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))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " payload\n");
+ if (GNUNET_YES == GMC_is_pid_bigger(t->next_send_pid, t->max_send_pid))
+ {
+ /* This tunnel is not ready to transmit yet, try next message */
+ next = th->next;
+ continue;
+ }
+ t->packet_size = 0;
+ if (t->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ {
+ /* traffic to origin */
+ struct GNUNET_MESH_ToOrigin to;
+ struct GNUNET_MessageHeader *mh;
+
+ GNUNET_assert (size >= th->size);
+ mh = (struct GNUNET_MessageHeader *) &cbuf[sizeof (to)];
+ psize = th->notify (th->notify_cls, size - sizeof (to), mh);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " to origin, type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ if (psize > 0)
+ {
+ psize += sizeof (to);
+ GNUNET_assert (size >= psize);
+ to.header.size = htons (psize);
+ to.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
+ to.tid = htonl (t->tid);
+ to.pid = htonl (t->next_send_pid);
+ to.ttl = 0;
+ memset (&to.oid, 0, sizeof (struct GNUNET_PeerIdentity));
+ memset (&to.sender, 0, sizeof (struct GNUNET_PeerIdentity));
+ memcpy (cbuf, &to, sizeof (to));
+ }
+ }
+ else if (th->target == 0)
+ {
+ /* multicast */
+ struct GNUNET_MESH_Multicast mc;
+ struct GNUNET_MessageHeader *mh;
+
+ GNUNET_assert (size >= th->size);
+ mh = (struct GNUNET_MessageHeader *) &cbuf[sizeof (mc)];
+ psize = th->notify (th->notify_cls, size - sizeof (mc), mh);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " multicast, type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ if (psize > 0)
+ {
+ psize += sizeof (mc);
+ GNUNET_assert (size >= psize);
+ mc.header.size = htons (psize);
+ mc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
+ mc.tid = htonl (t->tid);
+ mc.pid = htonl (t->next_send_pid);
+ mc.ttl = 0;
+ memset (&mc.oid, 0, sizeof (struct GNUNET_PeerIdentity));
+ memcpy (cbuf, &mc, sizeof (mc));
+ }
+ }
+ else
+ {
+ /* unicast */
+ struct GNUNET_MESH_Unicast uc;
+ struct GNUNET_MessageHeader *mh;
+
+ GNUNET_assert (size >= th->size);
+ mh = (struct GNUNET_MessageHeader *) &cbuf[sizeof (uc)];
+ psize = th->notify (th->notify_cls, size - sizeof (uc), mh);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " unicast, type %s\n",
+ GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
+ if (psize > 0)
+ {
+ psize += sizeof (uc);
+ GNUNET_assert (size >= psize);
+ uc.header.size = htons (psize);
+ uc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
+ uc.tid = htonl (t->tid);
+ uc.pid = htonl (t->next_send_pid);
+ uc.ttl = 0;
+ memset (&uc.oid, 0, sizeof (struct GNUNET_PeerIdentity));
+ GNUNET_PEER_resolve (th->target, &uc.destination);
+ memcpy (cbuf, &uc, sizeof (uc));
+ }
+ }
+ t->next_send_pid++;
+ }
+ else
+ {
+ struct GNUNET_MessageHeader *mh = (struct GNUNET_MessageHeader *) &th[1];
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " mesh 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
*************************/
+/******************************************************************************/
+
+/**
+ * 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 *inbound* tunnel is created
+ * @param cleaner function called when an *inbound* 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
+ * note that the mesh is allowed to drop notifications about
+ * inbound messages if the client does not process them fast
+ * enough (for this notification type, a bounded queue is used)
+ * @param stypes list of the applications that this client claims to provide
+ * @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 GNUNET_MESH_ApplicationType *stypes)
+{
+ struct GNUNET_MESH_Handle *h;
+ size_t size;
+
+ 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->next_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
+ h->reconnect_time = GNUNET_TIME_UNIT_MILLISECONDS;
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+
+ /* count apps */
+ for (h->n_applications = 0;
+ stypes && stypes[h->n_applications];
+ h->n_applications++) ;
+ if (0 < h->n_applications)
+ {
+ size = h->n_applications * sizeof (GNUNET_MESH_ApplicationType *);
+ h->applications = GNUNET_malloc (size);
+ memcpy (h->applications, stypes, size);
+ }
+ /* count handlers */
+ for (h->n_handlers = 0;
+ handlers && handlers[h->n_handlers].type;
+ h->n_handlers++) ;
+ send_connect (h);
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "GNUNET_MESH_connect() END\n");
+ return h;
+}
+
+
+/**
+ * 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)
+{
+ 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_non_null (handle->applications);
+ GNUNET_free (handle);
+}
+
+
+/**
+ * Announce to ther peer the availability of services described by the regex,
+ * in order to be reachable to other peers via connect_by_string.
+ *
+ * Note that the first 8 characters are considered to be part of a prefix,
+ * (for instance 'gnunet://'). If you put a variable part in there (*, +. ()),
+ * all matching strings will be stored in the DHT.
+ *
+ * @param h Handle to mesh.
+ * @param regex String with the regular expression describing local services.
+ * @param compression_characters How many characters can be assigned to one
+ * edge of the graph. The bigger the variability
+ * of the data, the smaller this parameter should
+ * be (down to 1).
+ * For maximum compression, use strlen (regex)
+ * or 0 (special value). Use with care!
+ */
+void
+GNUNET_MESH_announce_regex (struct GNUNET_MESH_Handle *h,
+ const char *regex,
+ unsigned int compression_characters)
+{
+ struct GNUNET_MESH_RegexAnnounce *msg;
+ size_t payload;
+ size_t len;
+ size_t msgsize;
+ size_t offset;
+ char buffer[UINT16_MAX];
+
+ len = strlen (regex);
+ payload = UINT16_MAX - sizeof(struct GNUNET_MESH_RegexAnnounce);
+ msg = (struct GNUNET_MESH_RegexAnnounce *) buffer;
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX);
+ msg->compression_characters = htons (compression_characters);
+ offset = 0;
+ do
+ {
+ msgsize = (len - offset > payload) ? payload : len - offset;
+ memcpy (&msg[1], ®ex[offset], msgsize);
+ offset += msgsize;
+ msgsize += sizeof(struct GNUNET_MESH_RegexAnnounce);
+
+ msg->header.size = htons (msgsize);
+ msg->last = htons (offset >= len);
+
+ send_packet (h, &msg->header, NULL);
+ } while (len > offset);
+}
+
+/**
+ * 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 connect_handler function to call when peers are actually connected
+ * @param disconnect_handler function to call when peers are disconnected
+ * @param handler_cls closure for connect/disconnect handlers
+ */
+struct GNUNET_MESH_Tunnel *
+GNUNET_MESH_tunnel_create (struct GNUNET_MESH_Handle *h, void *tunnel_ctx,
+ GNUNET_MESH_PeerConnectHandler connect_handler,
+ GNUNET_MESH_PeerDisconnectHandler
disconnect_handler,
+ void *handler_cls)
+{
+ struct GNUNET_MESH_Tunnel *t;
+ struct GNUNET_MESH_TunnelMessage msg;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Creating new tunnel\n");
+ 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->connect_handler = connect_handler;
+ t->disconnect_handler = disconnect_handler;
+ t->cls = handler_cls;
+ t->ctx = tunnel_ctx;
+ 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);
+ send_packet (h, &msg.header, t);
+ return t;
+}
+
+
+/**
+ * Destroy an existing tunnel. The existing callback for the tunnel will NOT
+ * be called.
+ *
+ * @param tunnel tunnel handle
+ */
+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);
+ 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_NO);
+ send_packet (h, &msg.header, NULL);
+}
+
+/**
+ * Request that the tunnel data rate is limited to the speed of the slowest
+ * receiver.
+ *
+ * @param tunnel Tunnel affected.
+ */
+void
+GNUNET_MESH_tunnel_speed_min (struct GNUNET_MESH_Tunnel *tunnel)
+{
+ struct GNUNET_MESH_TunnelMessage msg;
+ struct GNUNET_MESH_Handle *h;
+
+ h = tunnel->mesh;
+ tunnel->speed_min = GNUNET_YES;
+
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN);
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ msg.tunnel_id = htonl (tunnel->tid);
+
+ send_packet (h, &msg.header, NULL);
+}
+
+
+/**
+ * Request that the tunnel data rate is limited to the speed of the fastest
+ * receiver. This is the default behavior.
+ *
+ * @param tunnel Tunnel affected.
+ */
+void
+GNUNET_MESH_tunnel_speed_max (struct GNUNET_MESH_Tunnel *tunnel)
+{
+ struct GNUNET_MESH_TunnelMessage msg;
+ struct GNUNET_MESH_Handle *h;
+
+ h = tunnel->mesh;
+ tunnel->speed_min = GNUNET_NO;
+
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX);
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ msg.tunnel_id = htonl (tunnel->tid);
+
+ send_packet (h, &msg.header, NULL);
+}
+
+/**
+ * Turn on/off the buffering status of the tunnel.
+ *
+ * @param tunnel Tunnel affected.
+ * @param buffer GNUNET_YES to turn buffering on (default),
+ * GNUNET_NO otherwise.
+ */
+void
+GNUNET_MESH_tunnel_buffer (struct GNUNET_MESH_Tunnel *tunnel, int buffer)
+{
+ struct GNUNET_MESH_TunnelMessage msg;
+ struct GNUNET_MESH_Handle *h;
+
+ h = tunnel->mesh;
+ tunnel->buffering = buffer;
+ tunnel->max_send_pid = tunnel->next_send_pid;
+
+ if (GNUNET_YES == buffer)
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER);
+ else
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER);
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_TunnelMessage));
+ msg.tunnel_id = htonl (tunnel->tid);
+
+ send_packet (h, &msg.header, NULL);
+}
+
+
+/**
+ * Request that a peer should be added to the tunnel. The existing
+ * connect handler will be called ONCE with either success or failure.
+ * This function should NOT be called again with the same peer before the
+ * connect handler is called.
+ * FIXME: I think the above documentation is false. I think it should
+ * read: "The connect handler will be called once the peer was actually
+ * successfully added to the multicast group. This function should
+ * not be called twice for the same peer (unless, of course,
+ * the peer was removed using GNUNET_MESH_peer_Request_connect_del in
+ * the meantime).
+ *
+ * @param tunnel handle to existing tunnel
+ * @param peer peer to add
+ */
+void
+GNUNET_MESH_peer_request_connect_add (struct GNUNET_MESH_Tunnel *tunnel,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ struct GNUNET_MESH_PeerControl msg;
+ GNUNET_PEER_Id peer_id;
+ unsigned int i;
+
+ peer_id = GNUNET_PEER_intern (peer);
+ for (i = 0; i < tunnel->npeers; i++)
+ {
+ if (tunnel->peers[i]->id == peer_id)
+ {
+ /* Peer already exists in tunnel */
+ GNUNET_PEER_change_rc (peer_id, -1);
+ GNUNET_break (0);
+ return;
+ }
+ }
+ if (NULL == add_peer_to_tunnel (tunnel, peer))
+ return;
+
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
+ msg.tunnel_id = htonl (tunnel->tid);
+ msg.peer = *peer;
+ send_packet (tunnel->mesh, &msg.header, tunnel);
+}
+
+
+/**
+ * Request that a peer should be removed from the tunnel. The existing
+ * disconnect handler will be called ONCE if we were connected.
+ *
+ * @param tunnel handle to existing tunnel
+ * @param peer peer to remove
+ */
+void
+GNUNET_MESH_peer_request_connect_del (struct GNUNET_MESH_Tunnel *tunnel,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ struct GNUNET_MESH_PeerControl msg;
+ GNUNET_PEER_Id peer_id;
+ unsigned int i;
+
+ peer_id = GNUNET_PEER_search (peer);
+ if (0 == peer_id)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ for (i = 0; i < tunnel->npeers; i++)
+ if (tunnel->peers[i]->id == peer_id)
+ break;
+ if (i == tunnel->npeers)
+ {
+ GNUNET_break (0);
+ return;
+ }
+ if (NULL != tunnel->disconnect_handler && tunnel->peers[i]->connected == 1)
+ tunnel->disconnect_handler (tunnel->cls, peer);
+ GNUNET_PEER_change_rc (peer_id, -1);
+ GNUNET_free (tunnel->peers[i]);
+ tunnel->peers[i] = tunnel->peers[tunnel->npeers - 1];
+ GNUNET_array_grow (tunnel->peers, tunnel->npeers, tunnel->npeers - 1);
+
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
+ msg.tunnel_id = htonl (tunnel->tid);
+ memcpy (&msg.peer, peer, sizeof (struct GNUNET_PeerIdentity));
+ send_packet (tunnel->mesh, &msg.header, tunnel);
+}
+
+/**
+ * Request that the mesh should try to connect to a peer matching the
+ * description given in the service string.
+ *
+ * FIXME: allow multiple? how to deal with reconnect?
+ *
+ * @param tunnel handle to existing tunnel
+ * @param description string describing the destination node requirements
+ */
+void
+GNUNET_MESH_peer_request_connect_by_string (struct GNUNET_MESH_Tunnel *tunnel,
+ const char *description)
+{
+ struct GNUNET_MESH_ConnectPeerByString *m;
+ size_t len;
+ size_t msgsize;
+
+ len = strlen (description);
+ msgsize = sizeof(struct GNUNET_MESH_ConnectPeerByString) + len;
+ GNUNET_assert (UINT16_MAX > msgsize);
+ {
+ char buffer[msgsize];
+
+ m = (struct GNUNET_MESH_ConnectPeerByString *) buffer;
+ m->header.size = htons (msgsize);
+ m->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING);
+ m->tunnel_id = htonl (tunnel->tid);
+ memcpy(&m[1], description, len);
+
+ send_packet (tunnel->mesh, &m->header, tunnel);
+ }
+}
+
+
+/**
+ * Request that the given peer isn't added to this tunnel in calls to
+ * connect_by_* calls, (due to misbehaviour, bad performance, ...).
+ *
+ * @param tunnel handle to existing tunnel.
+ * @param peer peer identity of the peer which should be blacklisted
+ * for the tunnel.
+ */
+void
+GNUNET_MESH_peer_blacklist (struct GNUNET_MESH_Tunnel *tunnel,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ struct GNUNET_MESH_PeerControl msg;
+
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST);
+ msg.tunnel_id = htonl (tunnel->tid);
+ msg.peer = *peer;
+ send_packet (tunnel->mesh, &msg.header, tunnel);
+
+ return;
+}
+
+
+/**
+ * Request that the given peer isn't blacklisted anymore from this tunnel,
+ * and therefore can be added in future calls to connect_by_*.
+ * The peer must have been previously blacklisted for this tunnel.
+ *
+ * @param tunnel handle to existing tunnel.
+ * @param peer peer identity of the peer which shouldn't be blacklisted
+ * for the tunnel anymore.
+ */
+void
+GNUNET_MESH_peer_unblacklist (struct GNUNET_MESH_Tunnel *tunnel,
+ const struct GNUNET_PeerIdentity *peer)
+{
+ struct GNUNET_MESH_PeerControl msg;
+
+ msg.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST);
+ msg.tunnel_id = htonl (tunnel->tid);
+ msg.peer = *peer;
+ send_packet (tunnel->mesh, &msg.header, tunnel);
+
+ return;
+}
+
+
+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;
+ size_t overhead;
+
+ 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);
+ 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->target = GNUNET_PEER_intern (target);
+ if (tunnel->tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
+ overhead = sizeof (struct GNUNET_MESH_ToOrigin);
+ else if (NULL == target)
+ overhead = sizeof (struct GNUNET_MESH_Multicast);
+ else
+ overhead = sizeof (struct GNUNET_MESH_Unicast);
+ tunnel->packet_size = th->size = notify_size + overhead;
+ 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 (GMC_is_pid_bigger(tunnel->next_send_pid, tunnel->max_send_pid))
+ return th;
+ LOG (GNUNET_ERROR_TYPE_DEBUG, " call 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;
+}
+
+
+/**
+ * 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)
+{
+ 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;
+ }
+}
+
+
+/**
+ * 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!
+ *
+ * @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.npeers = htonl (0);
+ 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;
+}
+
+
+/**
+ * Transition API for tunnel ctx management
+ */
+void
+GNUNET_MESH_tunnel_set_data (struct GNUNET_MESH_Tunnel *tunnel, void *data)
+{
+ tunnel->ctx = data;
+}
+
+/**
+ * Transition API for tunnel ctx management
+ */
+void *
+GNUNET_MESH_tunnel_get_data (struct GNUNET_MESH_Tunnel *tunnel)
+{
+ return tunnel->ctx;
+}
+
+
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