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.h" /* GNUNET_MESH_Data is shared */
30 #include "gnunet-service-mesh_local.h"
31 #include "gnunet-service-mesh_channel.h"
33 #define LOG(level, ...) GNUNET_log_from(level,"mesh-loc",__VA_ARGS__)
35 /******************************************************************************/
36 /******************************** STRUCTS **********************************/
37 /******************************************************************************/
40 * Struct containing information about a client of the service
42 * TODO: add a list of 'waiting' ports
49 struct MeshClient *next;
54 struct MeshClient *prev;
57 * Tunnels that belong to this client, indexed by local id
59 struct GNUNET_CONTAINER_MultiHashMap32 *own_channels;
62 * Tunnels this client has accepted, indexed by incoming local id
64 struct GNUNET_CONTAINER_MultiHashMap32 *incoming_channels;
67 * Channel ID for the next incoming channel.
69 MESH_ChannelNumber next_chid;
72 * Handle to communicate with the client
74 struct GNUNET_SERVER_Client *handle;
77 * Ports that this client has declared interest in.
78 * Indexed by port, contains *Client.
80 struct GNUNET_CONTAINER_MultiHashMap32 *ports;
83 * Whether the client is active or shutting down (don't send confirmations
84 * to a client that is shutting down.
89 * ID of the client, mainly for debug messages
94 /******************************************************************************/
95 /******************************* GLOBALS ***********************************/
96 /******************************************************************************/
99 * Global handle to the statistics service.
101 extern struct GNUNET_STATISTICS_Handle *stats;
104 * Handle to server lib.
106 static struct GNUNET_SERVER_Handle *server_handle;
109 * DLL with all the clients, head.
111 static struct MeshClient *clients_head;
114 * DLL with all the clients, tail.
116 static struct MeshClient *clients_tail;
119 * Next ID to assign to a client.
121 unsigned int next_client_id;
124 * All ports clients of this peer have opened.
126 static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
129 * Notification context, to send messages to local clients.
131 static struct GNUNET_SERVER_NotificationContext *nc;
134 /******************************************************************************/
135 /******************************** STATIC ***********************************/
136 /******************************************************************************/
139 * Remove client's ports from the global hashmap on disconnect.
141 * @param cls Closure (unused).
143 * @param value Client structure.
145 * @return GNUNET_OK, keep iterating.
148 client_release_ports (void *cls,
154 res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value);
155 if (GNUNET_YES != res)
158 LOG (GNUNET_ERROR_TYPE_WARNING,
159 "Port %u by client %p was not registered.\n",
167 /******************************************************************************/
168 /******************************** HANDLES ***********************************/
169 /******************************************************************************/
173 * Handler for client connection.
175 * @param cls Closure (unused).
176 * @param client Client handler.
179 handle_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
181 struct MeshClient *c;
183 LOG (GNUNET_ERROR_TYPE_DEBUG, "client connected: %p\n", client);
186 c = GNUNET_new (struct MeshClient);
188 c->id = next_client_id++; /* overflow not important: just for debug */
189 c->next_chid = GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
190 GNUNET_SERVER_client_keep (client);
191 GNUNET_SERVER_client_set_user_context (client, c);
192 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
197 * Iterator for deleting each channel whose client endpoint disconnected.
199 * @param cls Closure (client that has disconnected).
200 * @param key The local channel id (used to access the hashmap).
201 * @param value The value stored at the key (channel to destroy).
203 * @return GNUNET_OK, keep iterating.
206 channel_destroy_iterator (void *cls,
210 struct MeshChannel *ch = value;
211 struct MeshClient *c = cls;
213 LOG (GNUNET_ERROR_TYPE_DEBUG,
214 " Channel %s destroy, due to client %s shutdown.\n",
215 GMCH_2s (ch), GML_2s (c));
217 GMCH_handle_local_destroy (ch, c, key < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV);
222 * Handler for client disconnection
225 * @param client identification of the client; NULL
226 * for the last call when the server is destroyed
229 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
231 struct MeshClient *c;
233 LOG (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
236 LOG (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
240 c = GML_client_get (client);
243 LOG (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
245 GNUNET_SERVER_client_drop (c->handle);
246 c->shutting_down = GNUNET_YES;
247 if (NULL != c->own_channels)
249 GNUNET_CONTAINER_multihashmap32_iterate (c->own_channels,
250 &channel_destroy_iterator, c);
251 GNUNET_CONTAINER_multihashmap32_destroy (c->own_channels);
254 if (NULL != c->incoming_channels)
256 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_channels,
257 &channel_destroy_iterator, c);
258 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_channels);
261 if (NULL != c->ports)
263 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
264 &client_release_ports, c);
265 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
267 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
268 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
269 LOG (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
274 LOG (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
276 LOG (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
282 * Handler for new clients
285 * @param client identification of the client
286 * @param message the actual message, which includes messages the client wants
289 handle_new_client (void *cls, struct GNUNET_SERVER_Client *client,
290 const struct GNUNET_MessageHeader *message)
292 struct GNUNET_MESH_ClientConnect *cc_msg;
293 struct MeshClient *c;
298 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nnew client connected %p\n", client);
300 /* Check data sanity */
301 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
302 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
303 if (0 != (size % sizeof (uint32_t)))
306 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
309 size /= sizeof (uint32_t);
311 /* Initialize new client structure */
312 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
313 LOG (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
314 LOG (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
319 p = (uint32_t *) &cc_msg[1];
320 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
321 for (i = 0; i < size; i++)
324 LOG (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
326 /* store in client's hashmap */
327 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
328 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
329 /* store in global hashmap */
330 /* FIXME only allow one client to have the port open,
331 * have a backup hashmap with waiting clients */
332 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
333 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
337 c->own_channels = GNUNET_CONTAINER_multihashmap32_create (32);
338 c->incoming_channels = GNUNET_CONTAINER_multihashmap32_create (32);
339 GNUNET_SERVER_notification_context_add (nc, client);
340 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
342 GNUNET_SERVER_receive_done (client, GNUNET_OK);
343 LOG (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
348 * Handler for requests of new tunnels
350 * @param cls Closure.
351 * @param client Identification of the client.
352 * @param message The actual message.
355 handle_channel_create (void *cls, struct GNUNET_SERVER_Client *client,
356 const struct GNUNET_MessageHeader *message)
358 struct MeshClient *c;
360 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nnew channel requested\n");
362 /* Sanity check for client registration */
363 if (NULL == (c = GML_client_get (client)))
366 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
369 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
371 /* Message size sanity check */
372 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
375 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
380 GMCH_handle_local_create (c,
381 (struct GNUNET_MESH_ChannelMessage *) message))
383 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
387 GNUNET_SERVER_receive_done (client, GNUNET_OK);
393 * Handler for requests of deleting tunnels
396 * @param client identification of the client
397 * @param message the actual message
400 handle_channel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
401 const struct GNUNET_MessageHeader *message)
403 struct GNUNET_MESH_ChannelMessage *msg;
404 struct MeshClient *c;
405 struct MeshChannel *ch;
406 MESH_ChannelNumber chid;
408 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot a DESTROY CHANNEL from client!\n");
410 /* Sanity check for client registration */
411 if (NULL == (c = GML_client_get (client)))
414 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
417 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
419 /* Message sanity check */
420 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
427 msg = (struct GNUNET_MESH_ChannelMessage *) message;
429 /* Retrieve tunnel */
430 chid = ntohl (msg->channel_id);
431 LOG (GNUNET_ERROR_TYPE_DEBUG, " for channel %X\n", chid);
432 ch = GML_channel_get (c, chid);
435 LOG (GNUNET_ERROR_TYPE_ERROR, " channel %X not found\n", chid);
437 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
441 GMCH_handle_local_destroy (ch, c, chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV);
443 GNUNET_SERVER_receive_done (client, GNUNET_OK);
449 * Handler for client traffic
452 * @param client identification of the client
453 * @param message the actual message
456 handle_data (void *cls, struct GNUNET_SERVER_Client *client,
457 const struct GNUNET_MessageHeader *message)
459 struct GNUNET_MESH_LocalData *msg;
460 struct MeshClient *c;
461 struct MeshChannel *ch;
462 MESH_ChannelNumber chid;
466 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot data from a client!\n");
468 /* Sanity check for client registration */
469 if (NULL == (c = GML_client_get (client)))
472 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
475 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
477 msg = (struct GNUNET_MESH_LocalData *) message;
479 /* Sanity check for message size */
480 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
481 if (size < sizeof (struct GNUNET_MessageHeader))
484 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
488 /* Channel exists? */
489 chid = ntohl (msg->id);
490 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
491 fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
492 ch = GML_channel_get (c, chid);
496 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
501 GMCH_handle_local_data (ch, c,
502 (struct GNUNET_MessageHeader *)&msg[1], fwd))
504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
508 LOG (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
509 GNUNET_SERVER_receive_done (client, GNUNET_OK);
516 * Handler for client's ACKs for payload traffic.
518 * @param cls Closure (unused).
519 * @param client Identification of the client.
520 * @param message The actual message.
523 handle_ack (void *cls, struct GNUNET_SERVER_Client *client,
524 const struct GNUNET_MessageHeader *message)
526 struct GNUNET_MESH_LocalAck *msg;
527 struct MeshChannel *ch;
528 struct MeshClient *c;
529 MESH_ChannelNumber chid;
532 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot a local ACK\n");
534 /* Sanity check for client registration */
535 if (NULL == (c = GML_client_get (client)))
538 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
541 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
543 msg = (struct GNUNET_MESH_LocalAck *) message;
545 /* Channel exists? */
546 chid = ntohl (msg->channel_id);
547 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
548 ch = GML_channel_get (c, chid);
549 LOG (GNUNET_ERROR_TYPE_DEBUG, " -- ch %p\n", ch);
553 LOG (GNUNET_ERROR_TYPE_WARNING, "Channel %X unknown.\n", chid);
554 LOG (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
555 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
559 /* If client is root, the ACK is going FWD, therefore this is "BCK ACK". */
560 /* If client is dest, the ACK is going BCK, therefore this is "FWD ACK" */
561 fwd = chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
563 GMCH_handle_local_ack (ch, fwd);
564 GNUNET_SERVER_receive_done (client, GNUNET_OK);
571 * Iterator over all tunnels to send a monitoring client info about each tunnel.
573 * @param cls Closure (client handle).
574 * @param key Key (hashed tunnel ID, unused).
575 * @param value Tunnel info.
577 * @return #GNUNET_YES, to keep iterating.
580 // monitor_all_tunnels_iterator (void *cls,
581 // const struct GNUNET_HashCode * key,
584 // struct GNUNET_SERVER_Client *client = cls;
585 // struct MeshChannel *ch = value;
586 // struct GNUNET_MESH_LocalMonitor *msg;
588 // msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
589 // msg->channel_id = htonl (ch->gid);
590 // msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
591 // msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
593 // LOG (GNUNET_ERROR_TYPE_INFO,
594 // "* sending info about tunnel %s\n",
595 // GNUNET_i2s (&msg->owner));
597 // GNUNET_SERVER_notification_context_unicast (nc, client,
598 // &msg->header, GNUNET_NO);
599 // return GNUNET_YES;
604 * Handler for client's MONITOR request.
606 * @param cls Closure (unused).
607 * @param client Identification of the client.
608 * @param message The actual message.
611 handle_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
612 const struct GNUNET_MessageHeader *message)
614 struct MeshClient *c;
616 /* Sanity check for client registration */
617 if (NULL == (c = GML_client_get (client)))
620 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
624 LOG (GNUNET_ERROR_TYPE_INFO,
625 "Received get tunnels request from client %u\n",
627 // GNUNET_CONTAINER_multihashmap_iterate (tunnels,
628 // monitor_all_tunnels_iterator,
630 LOG (GNUNET_ERROR_TYPE_INFO,
631 "Get tunnels request from client %u completed\n",
633 GNUNET_SERVER_receive_done (client, GNUNET_OK);
638 * Handler for client's MONITOR_TUNNEL request.
640 * @param cls Closure (unused).
641 * @param client Identification of the client.
642 * @param message The actual message.
645 handle_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
646 const struct GNUNET_MessageHeader *message)
648 const struct GNUNET_MESH_LocalMonitor *msg;
649 struct GNUNET_MESH_LocalMonitor *resp;
650 struct MeshClient *c;
651 struct MeshChannel *ch;
653 /* Sanity check for client registration */
654 if (NULL == (c = GML_client_get (client)))
657 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
661 msg = (struct GNUNET_MESH_LocalMonitor *) message;
662 LOG (GNUNET_ERROR_TYPE_INFO,
663 "Received tunnel info request from client %u for tunnel %s[%X]\n",
666 ntohl (msg->channel_id));
667 // ch = channel_get (&msg->owner, ntohl (msg->channel_id));
671 /* We don't know the tunnel */
672 struct GNUNET_MESH_LocalMonitor warn;
675 GNUNET_SERVER_notification_context_unicast (nc, client,
678 GNUNET_SERVER_receive_done (client, GNUNET_OK);
682 /* Initialize context */
683 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
685 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
686 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
687 &resp->header, GNUNET_NO);
690 LOG (GNUNET_ERROR_TYPE_INFO,
691 "Monitor tunnel request from client %u completed\n",
693 GNUNET_SERVER_receive_done (client, GNUNET_OK);
698 * Functions to handle messages from clients
700 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
701 {&handle_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
702 {&handle_channel_create, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE,
703 sizeof (struct GNUNET_MESH_ChannelMessage)},
704 {&handle_channel_destroy, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY,
705 sizeof (struct GNUNET_MESH_ChannelMessage)},
706 {&handle_data, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
707 {&handle_ack, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
708 sizeof (struct GNUNET_MESH_LocalAck)},
709 {&handle_get_tunnels, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
710 sizeof (struct GNUNET_MessageHeader)},
711 {&handle_show_tunnel, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
712 sizeof (struct GNUNET_MESH_LocalMonitor)},
718 /******************************************************************************/
719 /******************************** API ***********************************/
720 /******************************************************************************/
723 * Initialize server subsystem.
725 * @param handle Server handle.
728 GML_init (struct GNUNET_SERVER_Handle *handle)
730 LOG (GNUNET_ERROR_TYPE_DEBUG, "init\n");
731 server_handle = handle;
732 GNUNET_SERVER_suspend (server_handle);
733 ports = GNUNET_CONTAINER_multihashmap32_create (32);
738 * Install server (service) handlers and start listening to clients.
743 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
744 GNUNET_SERVER_connect_notify (server_handle, &handle_client_connect, NULL);
745 GNUNET_SERVER_disconnect_notify (server_handle, &handle_client_disconnect,
747 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
752 GNUNET_SERVER_resume (server_handle);
764 GNUNET_SERVER_notification_context_destroy (nc);
771 * Get a channel from a client.
773 * @param c Client to check.
774 * @param chid Channel ID, must be local (> 0x800...).
776 * @return non-NULL if channel exists in the clients lists
779 GML_channel_get (struct MeshClient *c, MESH_ChannelNumber chid)
781 struct GNUNET_CONTAINER_MultiHashMap32 *map;
783 if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
786 LOG (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
790 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
791 map = c->incoming_channels;
792 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
793 map = c->own_channels;
798 LOG (GNUNET_ERROR_TYPE_DEBUG,
799 "Client %s does no t have a valid map for CHID %X\n",
803 return GNUNET_CONTAINER_multihashmap32_get (map, chid);
808 * Add a channel to a client
810 * @param client Client.
811 * @param chid Channel ID.
815 GML_channel_add (struct MeshClient *client,
817 struct MeshChannel *ch)
819 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
820 GNUNET_CONTAINER_multihashmap32_put (client->incoming_channels, chid, ch,
821 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
822 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
823 GNUNET_CONTAINER_multihashmap32_put (client->own_channels, chid, ch,
824 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
831 * Remove a channel from a client.
833 * @param client Client.
834 * @param chid Channel ID.
838 GML_channel_remove (struct MeshClient *client,
840 struct MeshChannel *ch)
842 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
843 GNUNET_break (GNUNET_YES ==
844 GNUNET_CONTAINER_multihashmap32_remove (client->incoming_channels,
846 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= chid)
847 GNUNET_break (GNUNET_YES ==
848 GNUNET_CONTAINER_multihashmap32_remove (client->own_channels,
856 * Get the tunnel's next free local channel ID.
860 * @return LID of a channel free to use.
863 GML_get_next_chid (struct MeshClient *c)
865 MESH_ChannelNumber chid;
867 while (NULL != GML_channel_get (c, c->next_chid))
869 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %u exists...\n", c->next_chid);
870 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
873 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
880 * Check if client has registered with the service and has not disconnected
882 * @param client the client to check
884 * @return non-NULL if client exists in the global DLL
887 GML_client_get (struct GNUNET_SERVER_Client *client)
889 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
893 * Find a client that has opened a port
895 * @param port Port to check.
897 * @return non-NULL if a client has the port.
900 GML_client_get_by_port (uint32_t port)
902 return GNUNET_CONTAINER_multihashmap32_get (ports, port);
907 * Deletes a channel from a client (either owner or destination).
909 * @param c Client whose tunnel to delete.
910 * @param ch Channel which should be deleted.
911 * @param id Channel ID.
914 GML_client_delete_channel (struct MeshClient *c,
915 struct MeshChannel *ch,
916 MESH_ChannelNumber id)
920 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= id)
922 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
924 if (GNUNET_YES != res)
925 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel dest KO\n");
927 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= id)
929 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
931 if (GNUNET_YES != res)
932 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel root KO\n");
941 * Build a local ACK message and send it to a local client, if needed.
943 * If the client was already allowed to send data, do nothing.
945 * @param c Client to whom send the ACK.
946 * @param id Channel ID to use
949 GML_send_ack (struct MeshClient *c, MESH_ChannelNumber id)
951 struct GNUNET_MESH_LocalAck msg;
953 LOG (GNUNET_ERROR_TYPE_DEBUG,
954 "send local %s ack on %X towards %p\n",
955 id < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV ? "FWD" : "BCK", id, c);
957 msg.header.size = htons (sizeof (msg));
958 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
959 msg.channel_id = htonl (id);
960 GNUNET_SERVER_notification_context_unicast (nc,
969 * Build a local channel NACK message and send it to a local client.
971 * @param c Client to whom send the NACK.
972 * @param id Channel ID to use
975 GML_send_nack (struct MeshClient *c, MESH_ChannelNumber id)
977 struct GNUNET_MESH_LocalAck msg;
979 LOG (GNUNET_ERROR_TYPE_DEBUG,
980 "send local nack on %X towards %p\n",
983 msg.header.size = htons (sizeof (msg));
984 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_NACK);
985 msg.channel_id = htonl (id);
986 GNUNET_SERVER_notification_context_unicast (nc,
995 * Notify the client that a new incoming channel was created.
997 * @param c Client to notify.
998 * @param id Channel ID.
999 * @param port Channel's destination port.
1000 * @param opt Options (bit array).
1001 * @param peer Origin peer.
1004 GML_send_channel_create (struct MeshClient *c,
1005 uint32_t id, uint32_t port, uint32_t opt,
1006 const struct GNUNET_PeerIdentity *peer)
1008 struct GNUNET_MESH_ChannelMessage msg;
1010 msg.header.size = htons (sizeof (msg));
1011 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1012 msg.channel_id = htonl (id);
1013 msg.port = htonl (port);
1014 msg.opt = htonl (opt);
1016 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1017 &msg.header, GNUNET_NO);
1022 * Notify a client that a channel is no longer valid.
1025 * @param id ID of the channel that is destroyed.
1028 GML_send_channel_destroy (struct MeshClient *c, uint32_t id)
1030 struct GNUNET_MESH_ChannelMessage msg;
1037 msg.header.size = htons (sizeof (msg));
1038 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1039 msg.channel_id = htonl (id);
1040 msg.port = htonl (0);
1041 memset (&msg.peer, 0, sizeof (msg.peer));
1042 msg.opt = htonl (0);
1043 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1044 &msg.header, GNUNET_NO);
1049 * Modify the mesh message ID from global to local and send to client.
1051 * @param c Client to send to.
1052 * @param msg Message to modify and send.
1053 * @param id Channel ID to use (c can be both owner and client).
1056 GML_send_data (struct MeshClient *c,
1057 const struct GNUNET_MESH_Data *msg,
1058 MESH_ChannelNumber id)
1060 struct GNUNET_MESH_LocalData *copy;
1061 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
1062 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
1064 if (size < sizeof (struct GNUNET_MessageHeader))
1066 GNUNET_break_op (0);
1074 copy = (struct GNUNET_MESH_LocalData *) cbuf;
1075 memcpy (©[1], &msg[1], size);
1076 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
1077 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
1078 copy->id = htonl (id);
1079 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1080 ©->header, GNUNET_NO);
1085 * Get the static string to represent a client.
1089 * @return Static string for the client.
1092 GML_2s (const struct MeshClient *c)
1094 static char buf[32];
1096 sprintf (buf, "%u", c->id);