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_DEBUG, " channel %X not found\n", chid);
436 GNUNET_STATISTICS_update (stats,
437 "# client destroy messages on unknown channel",
439 GNUNET_SERVER_receive_done (client, GNUNET_OK);
443 GMCH_handle_local_destroy (ch, c, chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV);
445 GNUNET_SERVER_receive_done (client, GNUNET_OK);
451 * Handler for client traffic
454 * @param client identification of the client
455 * @param message the actual message
458 handle_data (void *cls, struct GNUNET_SERVER_Client *client,
459 const struct GNUNET_MessageHeader *message)
461 struct GNUNET_MESH_LocalData *msg;
462 struct MeshClient *c;
463 struct MeshChannel *ch;
464 MESH_ChannelNumber chid;
468 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot data from a client!\n");
470 /* Sanity check for client registration */
471 if (NULL == (c = GML_client_get (client)))
474 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
477 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
479 msg = (struct GNUNET_MESH_LocalData *) message;
481 /* Sanity check for message size */
482 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
483 if (size < sizeof (struct GNUNET_MessageHeader))
486 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
490 /* Channel exists? */
491 chid = ntohl (msg->id);
492 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
493 fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
494 ch = GML_channel_get (c, chid);
497 GNUNET_STATISTICS_update (stats,
498 "# client data messages on unknown channel",
500 GNUNET_SERVER_receive_done (client, GNUNET_OK);
505 GMCH_handle_local_data (ch, c,
506 (struct GNUNET_MessageHeader *)&msg[1], fwd))
508 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
512 LOG (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
513 GNUNET_SERVER_receive_done (client, GNUNET_OK);
520 * Handler for client's ACKs for payload traffic.
522 * @param cls Closure (unused).
523 * @param client Identification of the client.
524 * @param message The actual message.
527 handle_ack (void *cls, struct GNUNET_SERVER_Client *client,
528 const struct GNUNET_MessageHeader *message)
530 struct GNUNET_MESH_LocalAck *msg;
531 struct MeshChannel *ch;
532 struct MeshClient *c;
533 MESH_ChannelNumber chid;
536 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot a local ACK\n");
538 /* Sanity check for client registration */
539 if (NULL == (c = GML_client_get (client)))
542 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
545 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
547 msg = (struct GNUNET_MESH_LocalAck *) message;
549 /* Channel exists? */
550 chid = ntohl (msg->channel_id);
551 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
552 ch = GML_channel_get (c, chid);
553 LOG (GNUNET_ERROR_TYPE_DEBUG, " -- ch %p\n", ch);
556 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %X unknown.\n", chid);
557 LOG (GNUNET_ERROR_TYPE_DEBUG, " for client %u.\n", c->id);
558 GNUNET_STATISTICS_update (stats,
559 "# client ack messages on unknown channel",
561 GNUNET_SERVER_receive_done (client, GNUNET_OK);
565 /* If client is root, the ACK is going FWD, therefore this is "BCK ACK". */
566 /* If client is dest, the ACK is going BCK, therefore this is "FWD ACK" */
567 fwd = chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
569 GMCH_handle_local_ack (ch, fwd);
570 GNUNET_SERVER_receive_done (client, GNUNET_OK);
577 * Iterator over all tunnels to send a monitoring client info about each tunnel.
579 * @param cls Closure (client handle).
580 * @param key Key (hashed tunnel ID, unused).
581 * @param value Tunnel info.
583 * @return #GNUNET_YES, to keep iterating.
586 // monitor_all_tunnels_iterator (void *cls,
587 // const struct GNUNET_HashCode * key,
590 // struct GNUNET_SERVER_Client *client = cls;
591 // struct MeshChannel *ch = value;
592 // struct GNUNET_MESH_LocalMonitor *msg;
594 // msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
595 // msg->channel_id = htonl (ch->gid);
596 // msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
597 // msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
599 // LOG (GNUNET_ERROR_TYPE_INFO,
600 // "* sending info about tunnel %s\n",
601 // GNUNET_i2s (&msg->owner));
603 // GNUNET_SERVER_notification_context_unicast (nc, client,
604 // &msg->header, GNUNET_NO);
605 // return GNUNET_YES;
610 * Handler for client's MONITOR request.
612 * @param cls Closure (unused).
613 * @param client Identification of the client.
614 * @param message The actual message.
617 handle_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
618 const struct GNUNET_MessageHeader *message)
620 struct MeshClient *c;
622 /* Sanity check for client registration */
623 if (NULL == (c = GML_client_get (client)))
626 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
630 LOG (GNUNET_ERROR_TYPE_INFO,
631 "Received get tunnels request from client %u\n",
633 // GNUNET_CONTAINER_multihashmap_iterate (tunnels,
634 // monitor_all_tunnels_iterator,
636 LOG (GNUNET_ERROR_TYPE_INFO,
637 "Get tunnels request from client %u completed\n",
639 GNUNET_SERVER_receive_done (client, GNUNET_OK);
644 * Handler for client's MONITOR_TUNNEL request.
646 * @param cls Closure (unused).
647 * @param client Identification of the client.
648 * @param message The actual message.
651 handle_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
652 const struct GNUNET_MessageHeader *message)
654 const struct GNUNET_MESH_LocalMonitor *msg;
655 struct GNUNET_MESH_LocalMonitor *resp;
656 struct MeshClient *c;
657 struct MeshChannel *ch;
659 /* Sanity check for client registration */
660 if (NULL == (c = GML_client_get (client)))
663 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
667 msg = (struct GNUNET_MESH_LocalMonitor *) message;
668 LOG (GNUNET_ERROR_TYPE_INFO,
669 "Received tunnel info request from client %u for tunnel %s[%X]\n",
672 ntohl (msg->channel_id));
673 // ch = channel_get (&msg->owner, ntohl (msg->channel_id));
677 /* We don't know the tunnel */
678 struct GNUNET_MESH_LocalMonitor warn;
681 GNUNET_SERVER_notification_context_unicast (nc, client,
684 GNUNET_SERVER_receive_done (client, GNUNET_OK);
688 /* Initialize context */
689 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
691 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
692 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
693 &resp->header, GNUNET_NO);
696 LOG (GNUNET_ERROR_TYPE_INFO,
697 "Monitor tunnel request from client %u completed\n",
699 GNUNET_SERVER_receive_done (client, GNUNET_OK);
704 * Functions to handle messages from clients
706 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
707 {&handle_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
708 {&handle_channel_create, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE,
709 sizeof (struct GNUNET_MESH_ChannelMessage)},
710 {&handle_channel_destroy, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY,
711 sizeof (struct GNUNET_MESH_ChannelMessage)},
712 {&handle_data, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
713 {&handle_ack, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
714 sizeof (struct GNUNET_MESH_LocalAck)},
715 {&handle_get_tunnels, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
716 sizeof (struct GNUNET_MessageHeader)},
717 {&handle_show_tunnel, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
718 sizeof (struct GNUNET_MESH_LocalMonitor)},
724 /******************************************************************************/
725 /******************************** API ***********************************/
726 /******************************************************************************/
729 * Initialize server subsystem.
731 * @param handle Server handle.
734 GML_init (struct GNUNET_SERVER_Handle *handle)
736 LOG (GNUNET_ERROR_TYPE_DEBUG, "init\n");
737 server_handle = handle;
738 GNUNET_SERVER_suspend (server_handle);
739 ports = GNUNET_CONTAINER_multihashmap32_create (32);
744 * Install server (service) handlers and start listening to clients.
749 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
750 GNUNET_SERVER_connect_notify (server_handle, &handle_client_connect, NULL);
751 GNUNET_SERVER_disconnect_notify (server_handle, &handle_client_disconnect,
753 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
758 GNUNET_SERVER_resume (server_handle);
770 GNUNET_SERVER_notification_context_destroy (nc);
777 * Get a channel from a client.
779 * @param c Client to check.
780 * @param chid Channel ID, must be local (> 0x800...).
782 * @return non-NULL if channel exists in the clients lists
785 GML_channel_get (struct MeshClient *c, MESH_ChannelNumber chid)
787 struct GNUNET_CONTAINER_MultiHashMap32 *map;
789 if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
792 LOG (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
796 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
797 map = c->incoming_channels;
798 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
799 map = c->own_channels;
808 LOG (GNUNET_ERROR_TYPE_DEBUG,
809 "Client %s does no t have a valid map for CHID %X\n",
813 return GNUNET_CONTAINER_multihashmap32_get (map, chid);
818 * Add a channel to a client
820 * @param client Client.
821 * @param chid Channel ID.
825 GML_channel_add (struct MeshClient *client,
827 struct MeshChannel *ch)
829 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
830 GNUNET_CONTAINER_multihashmap32_put (client->incoming_channels, chid, ch,
831 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
832 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
833 GNUNET_CONTAINER_multihashmap32_put (client->own_channels, chid, ch,
834 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
841 * Remove a channel from a client.
843 * @param client Client.
844 * @param chid Channel ID.
848 GML_channel_remove (struct MeshClient *client,
850 struct MeshChannel *ch)
852 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
853 GNUNET_break (GNUNET_YES ==
854 GNUNET_CONTAINER_multihashmap32_remove (client->incoming_channels,
856 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= chid)
857 GNUNET_break (GNUNET_YES ==
858 GNUNET_CONTAINER_multihashmap32_remove (client->own_channels,
866 * Get the tunnel's next free local channel ID.
870 * @return LID of a channel free to use.
873 GML_get_next_chid (struct MeshClient *c)
875 MESH_ChannelNumber chid;
877 while (NULL != GML_channel_get (c, c->next_chid))
879 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %u exists...\n", c->next_chid);
880 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
883 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
890 * Check if client has registered with the service and has not disconnected
892 * @param client the client to check
894 * @return non-NULL if client exists in the global DLL
897 GML_client_get (struct GNUNET_SERVER_Client *client)
899 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
903 * Find a client that has opened a port
905 * @param port Port to check.
907 * @return non-NULL if a client has the port.
910 GML_client_get_by_port (uint32_t port)
912 return GNUNET_CONTAINER_multihashmap32_get (ports, port);
917 * Deletes a channel from a client (either owner or destination).
919 * @param c Client whose tunnel to delete.
920 * @param ch Channel which should be deleted.
921 * @param id Channel ID.
924 GML_client_delete_channel (struct MeshClient *c,
925 struct MeshChannel *ch,
926 MESH_ChannelNumber id)
930 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= id)
932 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
934 if (GNUNET_YES != res)
935 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel dest KO\n");
937 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= id)
939 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
941 if (GNUNET_YES != res)
942 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel root KO\n");
951 * Build a local ACK message and send it to a local client, if needed.
953 * If the client was already allowed to send data, do nothing.
955 * @param c Client to whom send the ACK.
956 * @param id Channel ID to use
959 GML_send_ack (struct MeshClient *c, MESH_ChannelNumber id)
961 struct GNUNET_MESH_LocalAck msg;
963 LOG (GNUNET_ERROR_TYPE_DEBUG,
964 "send local %s ack on %X towards %p\n",
965 id < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV ? "FWD" : "BCK", id, c);
967 msg.header.size = htons (sizeof (msg));
968 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
969 msg.channel_id = htonl (id);
970 GNUNET_SERVER_notification_context_unicast (nc,
979 * Build a local channel NACK message and send it to a local client.
981 * @param c Client to whom send the NACK.
982 * @param id Channel ID to use
985 GML_send_nack (struct MeshClient *c, MESH_ChannelNumber id)
987 struct GNUNET_MESH_LocalAck msg;
989 LOG (GNUNET_ERROR_TYPE_DEBUG,
990 "send local nack on %X towards %p\n",
993 msg.header.size = htons (sizeof (msg));
994 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_NACK);
995 msg.channel_id = htonl (id);
996 GNUNET_SERVER_notification_context_unicast (nc,
1005 * Notify the client that a new incoming channel was created.
1007 * @param c Client to notify.
1008 * @param id Channel ID.
1009 * @param port Channel's destination port.
1010 * @param opt Options (bit array).
1011 * @param peer Origin peer.
1014 GML_send_channel_create (struct MeshClient *c,
1015 uint32_t id, uint32_t port, uint32_t opt,
1016 const struct GNUNET_PeerIdentity *peer)
1018 struct GNUNET_MESH_ChannelMessage msg;
1020 msg.header.size = htons (sizeof (msg));
1021 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE);
1022 msg.channel_id = htonl (id);
1023 msg.port = htonl (port);
1024 msg.opt = htonl (opt);
1026 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1027 &msg.header, GNUNET_NO);
1032 * Notify a client that a channel is no longer valid.
1035 * @param id ID of the channel that is destroyed.
1038 GML_send_channel_destroy (struct MeshClient *c, uint32_t id)
1040 struct GNUNET_MESH_ChannelMessage msg;
1047 if (GNUNET_YES == c->shutting_down)
1049 msg.header.size = htons (sizeof (msg));
1050 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY);
1051 msg.channel_id = htonl (id);
1052 msg.port = htonl (0);
1053 memset (&msg.peer, 0, sizeof (msg.peer));
1054 msg.opt = htonl (0);
1055 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1056 &msg.header, GNUNET_NO);
1061 * Modify the mesh message ID from global to local and send to client.
1063 * @param c Client to send to.
1064 * @param msg Message to modify and send.
1065 * @param id Channel ID to use (c can be both owner and client).
1068 GML_send_data (struct MeshClient *c,
1069 const struct GNUNET_MESH_Data *msg,
1070 MESH_ChannelNumber id)
1072 struct GNUNET_MESH_LocalData *copy;
1073 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
1074 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
1076 if (size < sizeof (struct GNUNET_MessageHeader))
1078 GNUNET_break_op (0);
1086 copy = (struct GNUNET_MESH_LocalData *) cbuf;
1087 memcpy (©[1], &msg[1], size);
1088 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
1089 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
1090 copy->id = htonl (id);
1091 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1092 ©->header, GNUNET_NO);
1097 * Get the static string to represent a client.
1101 * @return Static string for the client.
1104 GML_2s (const struct MeshClient *c)
1106 static char buf[32];
1108 sprintf (buf, "%u", c->id);