2 This file is part of GNUnet.
3 (C) 2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
23 #include "gnunet_util_lib.h"
25 #include "gnunet_statistics_service.h"
28 #include "mesh_protocol_enc.h" // GNUNET_MESH_Data is shared
30 #include "gnunet-service-mesh_local.h"
32 #define LOG(level, ...) GNUNET_log_from(level,"mesh-loc",__VA_ARGS__)
34 /******************************************************************************/
35 /******************************** STRUCTS **********************************/
36 /******************************************************************************/
39 * Struct containing information about a client of the service
41 * TODO: add a list of 'waiting' ports
48 struct MeshClient *next;
53 struct MeshClient *prev;
56 * Tunnels that belong to this client, indexed by local id
58 struct GNUNET_CONTAINER_MultiHashMap32 *own_channels;
61 * Tunnels this client has accepted, indexed by incoming local id
63 struct GNUNET_CONTAINER_MultiHashMap32 *incoming_channels;
66 * Channel ID for the next incoming channel.
68 MESH_ChannelNumber next_chid;
71 * Handle to communicate with the client
73 struct GNUNET_SERVER_Client *handle;
76 * Ports that this client has declared interest in.
77 * Indexed by port, contains *Client.
79 struct GNUNET_CONTAINER_MultiHashMap32 *ports;
82 * Whether the client is active or shutting down (don't send confirmations
83 * to a client that is shutting down.
88 * ID of the client, mainly for debug messages
93 /******************************************************************************/
94 /******************************* GLOBALS ***********************************/
95 /******************************************************************************/
98 * Global handle to the statistics service.
100 extern struct GNUNET_STATISTICS_Handle *stats;
103 * Handle to server lib.
105 static struct GNUNET_SERVER_Handle *server_handle;
108 * DLL with all the clients, head.
110 static struct MeshClient *clients_head;
113 * DLL with all the clients, tail.
115 static struct MeshClient *clients_tail;
118 * Next ID to assign to a client.
120 unsigned int next_client_id;
123 * All ports clients of this peer have opened.
125 static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
128 * Notification context, to send messages to local clients.
130 static struct GNUNET_SERVER_NotificationContext *nc;
133 /******************************************************************************/
134 /******************************** STATIC ***********************************/
135 /******************************************************************************/
138 * Remove client's ports from the global hashmap on disconnect.
140 * @param cls Closure (unused).
142 * @param value Client structure.
144 * @return GNUNET_OK, keep iterating.
147 client_release_ports (void *cls,
153 res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value);
154 if (GNUNET_YES != res)
157 LOG (GNUNET_ERROR_TYPE_WARNING,
158 "Port %u by client %p was not registered.\n",
166 /******************************************************************************/
167 /******************************** HANDLES ***********************************/
168 /******************************************************************************/
172 * Handler for client connection.
174 * @param cls Closure (unused).
175 * @param client Client handler.
178 handle_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
180 struct MeshClient *c;
184 c = GNUNET_new (struct MeshClient);
186 c->id = next_client_id++; /* overflow not important: just for debug */
187 c->next_chid = GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
188 GNUNET_SERVER_client_keep (client);
189 GNUNET_SERVER_client_set_user_context (client, c);
190 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
195 * Iterator for deleting each channel whose client endpoint disconnected.
197 * @param cls Closure (client that has disconnected).
198 * @param key The local channel id (used to access the hashmap).
199 * @param value The value stored at the key (channel to destroy).
201 * @return GNUNET_OK, keep iterating.
204 channel_destroy_iterator (void *cls,
208 struct MeshChannel *ch = value;
209 struct MeshClient *c = cls;
211 LOG (GNUNET_ERROR_TYPE_DEBUG,
212 " Channel %s destroy, due to client %s shutdown.\n",
213 GMCH_2s (ch), GML_2s (c));
215 GMCH_handle_local_destroy (ch, c);
220 * Handler for client disconnection
223 * @param client identification of the client; NULL
224 * for the last call when the server is destroyed
227 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
229 struct MeshClient *c;
231 LOG (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
234 LOG (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
238 c = GML_client_get (client);
241 LOG (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
243 GNUNET_SERVER_client_drop (c->handle);
244 c->shutting_down = GNUNET_YES;
245 if (NULL != c->own_channels)
247 GNUNET_CONTAINER_multihashmap32_iterate (c->own_channels,
248 &channel_destroy_iterator, c);
249 GNUNET_CONTAINER_multihashmap32_destroy (c->own_channels);
252 if (NULL != c->incoming_channels)
254 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_channels,
255 &channel_destroy_iterator, c);
256 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_channels);
259 if (NULL != c->ports)
261 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
262 &client_release_ports, c);
263 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
265 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
266 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
267 LOG (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
272 LOG (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
274 LOG (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
280 * Handler for new clients
283 * @param client identification of the client
284 * @param message the actual message, which includes messages the client wants
287 handle_new_client (void *cls, struct GNUNET_SERVER_Client *client,
288 const struct GNUNET_MessageHeader *message)
290 struct GNUNET_MESH_ClientConnect *cc_msg;
291 struct MeshClient *c;
296 LOG (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
298 /* Check data sanity */
299 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
300 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
301 if (0 != (size % sizeof (uint32_t)))
304 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
307 size /= sizeof (uint32_t);
309 /* Initialize new client structure */
310 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
311 LOG (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
312 LOG (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
317 p = (uint32_t *) &cc_msg[1];
318 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
319 for (i = 0; i < size; i++)
322 LOG (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
324 /* store in client's hashmap */
325 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
326 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
327 /* store in global hashmap */
328 /* FIXME only allow one client to have the port open,
329 * have a backup hashmap with waiting clients */
330 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
331 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
335 c->own_channels = GNUNET_CONTAINER_multihashmap32_create (32);
336 c->incoming_channels = GNUNET_CONTAINER_multihashmap32_create (32);
337 GNUNET_SERVER_notification_context_add (nc, client);
338 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
340 GNUNET_SERVER_receive_done (client, GNUNET_OK);
341 LOG (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
346 * Handler for requests of new tunnels
348 * @param cls Closure.
349 * @param client Identification of the client.
350 * @param message The actual message.
353 handle_channel_create (void *cls, struct GNUNET_SERVER_Client *client,
354 const struct GNUNET_MessageHeader *message)
356 struct MeshClient *c;
358 LOG (GNUNET_ERROR_TYPE_DEBUG, "new channel requested\n");
360 /* Sanity check for client registration */
361 if (NULL == (c = GML_client_get (client)))
364 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
367 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
369 /* Message size sanity check */
370 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
373 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
378 GMCH_handle_local_create (c,
379 (struct GNUNET_MESH_ChannelMessage *) message))
381 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
385 GNUNET_SERVER_receive_done (client, GNUNET_OK);
391 * Handler for requests of deleting tunnels
394 * @param client identification of the client
395 * @param message the actual message
398 handle_channel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
399 const struct GNUNET_MessageHeader *message)
401 struct GNUNET_MESH_ChannelMessage *msg;
402 struct MeshClient *c;
403 struct MeshChannel *ch;
404 MESH_ChannelNumber chid;
406 LOG (GNUNET_ERROR_TYPE_DEBUG,
407 "Got a DESTROY CHANNEL from client!\n");
409 /* Sanity check for client registration */
410 if (NULL == (c = GML_client_get (client)))
413 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
416 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
418 /* Message sanity check */
419 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
422 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
426 msg = (struct GNUNET_MESH_ChannelMessage *) message;
428 /* Retrieve tunnel */
429 chid = ntohl (msg->channel_id);
430 ch = GML_channel_get (c, chid);
433 LOG (GNUNET_ERROR_TYPE_ERROR, " channel %X not found\n", chid);
435 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
439 GMCH_handle_local_destroy (ch, c);
441 GNUNET_SERVER_receive_done (client, GNUNET_OK);
447 * Handler for client traffic
450 * @param client identification of the client
451 * @param message the actual message
454 handle_data (void *cls, struct GNUNET_SERVER_Client *client,
455 const struct GNUNET_MessageHeader *message)
457 struct GNUNET_MESH_LocalData *msg;
458 struct MeshClient *c;
459 struct MeshChannel *ch;
460 MESH_ChannelNumber chid;
464 LOG (GNUNET_ERROR_TYPE_DEBUG,
465 "Got data from a client!\n");
467 /* Sanity check for client registration */
468 if (NULL == (c = GML_client_get (client)))
471 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
474 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
476 msg = (struct GNUNET_MESH_LocalData *) message;
478 /* Sanity check for message size */
479 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
480 if (size < sizeof (struct GNUNET_MessageHeader))
483 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
487 /* Channel exists? */
488 chid = ntohl (msg->id);
489 fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
490 ch = GML_channel_get (c, chid);
494 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
499 GMCH_handle_local_data (ch, c,
500 (struct GNUNET_MessageHeader *)&msg[1], fwd))
502 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
506 LOG (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
507 GNUNET_SERVER_receive_done (client, GNUNET_OK);
514 * Handler for client's ACKs for payload traffic.
516 * @param cls Closure (unused).
517 * @param client Identification of the client.
518 * @param message The actual message.
521 handle_ack (void *cls, struct GNUNET_SERVER_Client *client,
522 const struct GNUNET_MessageHeader *message)
524 struct GNUNET_MESH_LocalAck *msg;
525 struct MeshChannel *ch;
526 struct MeshClient *c;
527 MESH_ChannelNumber chid;
530 LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
532 /* Sanity check for client registration */
533 if (NULL == (c = GML_client_get (client)))
536 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
539 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
541 msg = (struct GNUNET_MESH_LocalAck *) message;
543 /* Channel exists? */
544 chid = ntohl (msg->channel_id);
545 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
546 ch = GML_channel_get (c, chid);
547 LOG (GNUNET_ERROR_TYPE_DEBUG, " -- ch %p\n", ch);
551 LOG (GNUNET_ERROR_TYPE_WARNING, "Channel %X unknown.\n", chid);
552 LOG (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
553 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
557 /* If client is root, the ACK is going FWD, therefore this is "BCK". */
558 /* If client is dest, the ACK is going BCK, therefore this is "FWD" */
559 fwd = chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
561 GMCH_handle_local_ack (ch, fwd);
562 GNUNET_SERVER_receive_done (client, GNUNET_OK);
569 * Iterator over all tunnels to send a monitoring client info about each tunnel.
571 * @param cls Closure (client handle).
572 * @param key Key (hashed tunnel ID, unused).
573 * @param value Tunnel info.
575 * @return GNUNET_YES, to keep iterating.
578 // monitor_all_tunnels_iterator (void *cls,
579 // const struct GNUNET_HashCode * key,
582 // struct GNUNET_SERVER_Client *client = cls;
583 // struct MeshChannel *ch = value;
584 // struct GNUNET_MESH_LocalMonitor *msg;
586 // msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
587 // msg->channel_id = htonl (ch->gid);
588 // msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
589 // msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
591 // LOG (GNUNET_ERROR_TYPE_INFO,
592 // "* sending info about tunnel %s\n",
593 // GNUNET_i2s (&msg->owner));
595 // GNUNET_SERVER_notification_context_unicast (nc, client,
596 // &msg->header, GNUNET_NO);
597 // return GNUNET_YES;
602 * Handler for client's MONITOR request.
604 * @param cls Closure (unused).
605 * @param client Identification of the client.
606 * @param message The actual message.
609 handle_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
610 const struct GNUNET_MessageHeader *message)
612 struct MeshClient *c;
614 /* Sanity check for client registration */
615 if (NULL == (c = GML_client_get (client)))
618 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
622 LOG (GNUNET_ERROR_TYPE_INFO,
623 "Received get tunnels request from client %u\n",
625 // GNUNET_CONTAINER_multihashmap_iterate (tunnels,
626 // monitor_all_tunnels_iterator,
628 LOG (GNUNET_ERROR_TYPE_INFO,
629 "Get tunnels request from client %u completed\n",
631 GNUNET_SERVER_receive_done (client, GNUNET_OK);
636 * Handler for client's MONITOR_TUNNEL request.
638 * @param cls Closure (unused).
639 * @param client Identification of the client.
640 * @param message The actual message.
643 handle_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
644 const struct GNUNET_MessageHeader *message)
646 const struct GNUNET_MESH_LocalMonitor *msg;
647 struct GNUNET_MESH_LocalMonitor *resp;
648 struct MeshClient *c;
649 struct MeshChannel *ch;
651 /* Sanity check for client registration */
652 if (NULL == (c = GML_client_get (client)))
655 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
659 msg = (struct GNUNET_MESH_LocalMonitor *) message;
660 LOG (GNUNET_ERROR_TYPE_INFO,
661 "Received tunnel info request from client %u for tunnel %s[%X]\n",
664 ntohl (msg->channel_id));
665 // ch = channel_get (&msg->owner, ntohl (msg->channel_id));
669 /* We don't know the tunnel */
670 struct GNUNET_MESH_LocalMonitor warn;
673 GNUNET_SERVER_notification_context_unicast (nc, client,
676 GNUNET_SERVER_receive_done (client, GNUNET_OK);
680 /* Initialize context */
681 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
683 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
684 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
685 &resp->header, GNUNET_NO);
688 LOG (GNUNET_ERROR_TYPE_INFO,
689 "Monitor tunnel request from client %u completed\n",
691 GNUNET_SERVER_receive_done (client, GNUNET_OK);
696 * Functions to handle messages from clients
698 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
699 {&handle_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
700 {&handle_channel_create, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE,
701 sizeof (struct GNUNET_MESH_ChannelMessage)},
702 {&handle_channel_destroy, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY,
703 sizeof (struct GNUNET_MESH_ChannelMessage)},
704 {&handle_data, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
705 {&handle_ack, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
706 sizeof (struct GNUNET_MESH_LocalAck)},
707 {&handle_get_tunnels, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
708 sizeof (struct GNUNET_MessageHeader)},
709 {&handle_show_tunnel, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
710 sizeof (struct GNUNET_MESH_LocalMonitor)},
716 /******************************************************************************/
717 /******************************** API ***********************************/
718 /******************************************************************************/
721 * Initialize server subsystem.
723 * @param handle Server handle.
726 GML_init (struct GNUNET_SERVER_Handle *handle)
728 server_handle = handle;
729 GNUNET_SERVER_suspend (server_handle);
730 ports = GNUNET_CONTAINER_multihashmap32_create (32);
735 * Install server (service) handlers and start listening to clients.
740 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
741 GNUNET_SERVER_connect_notify (server_handle, &handle_client_connect, NULL);
742 GNUNET_SERVER_disconnect_notify (server_handle, &handle_client_disconnect,
744 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
749 GNUNET_SERVER_resume (server_handle);
761 GNUNET_SERVER_notification_context_destroy (nc);
768 * Get a chennel from a client
770 * @param c the client to check
771 * @param chid Channel ID, must be local (> 0x800...)
773 * @return non-NULL if channel exists in the clients lists
776 GML_channel_get (struct MeshClient *c, MESH_ChannelNumber chid)
778 if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
781 LOG (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
784 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
785 return GNUNET_CONTAINER_multihashmap32_get (c->incoming_channels, chid);
786 return GNUNET_CONTAINER_multihashmap32_get (c->own_channels, chid);
791 * Add a channel to a client
793 * @param client Client.
794 * @param chid Channel ID.
798 GML_channel_add (struct MeshClient *client,
800 struct MeshChannel *ch)
802 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
803 GNUNET_CONTAINER_multihashmap32_put (client->incoming_channels, chid, ch,
804 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
805 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
806 GNUNET_CONTAINER_multihashmap32_put (client->own_channels, chid, ch,
807 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
814 * Remove a channel from a client
816 * @param client Client.
817 * @param chid Channel ID.
821 GML_channel_remove (struct MeshClient *client,
823 struct MeshChannel *ch)
825 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
826 GNUNET_CONTAINER_multihashmap32_remove (client->incoming_channels, chid, ch);
827 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= chid)
828 GNUNET_CONTAINER_multihashmap32_remove (client->own_channels, chid, ch);
835 * Get the tunnel's next free local channel ID.
839 * @return LID of a channel free to use.
842 GML_get_next_chid (struct MeshClient *c)
844 MESH_ChannelNumber chid;
846 while (NULL != GML_channel_get (c, c->next_chid))
848 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %u exists...\n", c->next_chid);
849 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
852 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
859 * Check if client has registered with the service and has not disconnected
861 * @param client the client to check
863 * @return non-NULL if client exists in the global DLL
866 GML_client_get (struct GNUNET_SERVER_Client *client)
868 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
872 * Find a client that has opened a port
874 * @param port Port to check.
876 * @return non-NULL if a client has the port.
879 GML_client_get_by_port (uint32_t port)
881 return GNUNET_CONTAINER_multihashmap32_get (ports, port);
886 * Deletes a channel from a client (either owner or destination).
888 * @param c Client whose tunnel to delete.
889 * @param ch Channel which should be deleted.
890 * @param id Channel ID.
893 GML_client_delete_channel (struct MeshClient *c,
894 struct MeshChannel *ch,
895 MESH_ChannelNumber id)
899 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= id)
901 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
903 if (GNUNET_YES != res)
904 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel dest KO\n");
906 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= id)
908 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
910 if (GNUNET_YES != res)
911 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel root KO\n");
920 * Build a local ACK message and send it to a local client, if needed.
922 * If the client was already allowed to send data, do nothing.
924 * @param c Client to whom send the ACK.
925 * @param id Channel ID to use
928 GML_send_ack (struct MeshClient *c, MESH_ChannelNumber id)
930 struct GNUNET_MESH_LocalAck msg;
932 LOG (GNUNET_ERROR_TYPE_DEBUG,
933 "send local %s ack on %X towards %p\n",
934 id < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV ? "FWD" : "BCK", id, c);
936 msg.header.size = htons (sizeof (msg));
937 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
938 msg.channel_id = htonl (id);
939 GNUNET_SERVER_notification_context_unicast (nc,
948 * Notify the client that a new incoming channel was created.
950 * @param ch Channel that was created.
953 GML_send_channel_create (struct MeshClient *c,
954 uint32_t id, uint32_t port, uint32_t opt,
955 const struct GNUNET_PeerIdentity *peer)
957 struct GNUNET_MESH_ChannelMessage msg;
959 msg.header.size = htons (sizeof (msg));
960 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
961 msg.channel_id = htonl (id);
962 msg.port = htonl (port);
963 msg.opt = htonl (opt);
965 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
966 &msg.header, GNUNET_NO);
971 * Notify a client that a channel is no longer valid.
974 * @param id ID of the channel that is destroyed.
977 GML_send_channel_destroy (struct MeshClient *c, uint32_t id)
979 struct GNUNET_MESH_ChannelMessage msg;
986 msg.header.size = htons (sizeof (msg));
987 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
988 msg.channel_id = htonl (id);
989 msg.port = htonl (0);
990 memset (&msg.peer, 0, sizeof (msg.peer));
992 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
993 &msg.header, GNUNET_NO);
998 * Modify the mesh message ID from global to local and send to client.
1000 * @param c Client to send to.
1001 * @param msg Message to modify and send.
1002 * @param id Channel ID to use (c can be both owner and client).
1005 GML_send_data (struct MeshClient *c,
1006 const struct GNUNET_MESH_Data *msg,
1007 MESH_ChannelNumber id)
1009 struct GNUNET_MESH_LocalData *copy;
1010 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
1011 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
1013 if (size < sizeof (struct GNUNET_MessageHeader))
1015 GNUNET_break_op (0);
1023 copy = (struct GNUNET_MESH_LocalData *) cbuf;
1024 memcpy (©[1], &msg[1], size);
1025 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
1026 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
1027 copy->id = htonl (id);
1028 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1029 ©->header, GNUNET_NO);
1034 * Get the static string to represent a client.
1038 * @return Static string for the client.
1041 GML_2s (const struct MeshClient *c)
1043 static char buf[32];
1045 sprintf (buf, "%u", c->id);