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_SERVER_receive_done (client, GNUNET_OK);
440 GMCH_handle_local_destroy (ch, c, chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV);
442 GNUNET_SERVER_receive_done (client, GNUNET_OK);
448 * Handler for client traffic
451 * @param client identification of the client
452 * @param message the actual message
455 handle_data (void *cls, struct GNUNET_SERVER_Client *client,
456 const struct GNUNET_MessageHeader *message)
458 struct GNUNET_MESH_LocalData *msg;
459 struct MeshClient *c;
460 struct MeshChannel *ch;
461 MESH_ChannelNumber chid;
465 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot 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 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
490 fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
491 ch = GML_channel_get (c, chid);
495 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
500 GMCH_handle_local_data (ch, c,
501 (struct GNUNET_MessageHeader *)&msg[1], fwd))
503 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
507 LOG (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
508 GNUNET_SERVER_receive_done (client, GNUNET_OK);
515 * Handler for client's ACKs for payload traffic.
517 * @param cls Closure (unused).
518 * @param client Identification of the client.
519 * @param message The actual message.
522 handle_ack (void *cls, struct GNUNET_SERVER_Client *client,
523 const struct GNUNET_MessageHeader *message)
525 struct GNUNET_MESH_LocalAck *msg;
526 struct MeshChannel *ch;
527 struct MeshClient *c;
528 MESH_ChannelNumber chid;
531 LOG (GNUNET_ERROR_TYPE_DEBUG, "\n\nGot a local ACK\n");
533 /* Sanity check for client registration */
534 if (NULL == (c = GML_client_get (client)))
537 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
540 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
542 msg = (struct GNUNET_MESH_LocalAck *) message;
544 /* Channel exists? */
545 chid = ntohl (msg->channel_id);
546 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
547 ch = GML_channel_get (c, chid);
548 LOG (GNUNET_ERROR_TYPE_DEBUG, " -- ch %p\n", ch);
551 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %X unknown.\n", chid);
552 LOG (GNUNET_ERROR_TYPE_DEBUG, " for client %u.\n", c->id);
553 GNUNET_SERVER_receive_done (client, GNUNET_OK);
557 /* If client is root, the ACK is going FWD, therefore this is "BCK ACK". */
558 /* If client is dest, the ACK is going BCK, therefore this is "FWD ACK" */
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 LOG (GNUNET_ERROR_TYPE_DEBUG, "init\n");
729 server_handle = handle;
730 GNUNET_SERVER_suspend (server_handle);
731 ports = GNUNET_CONTAINER_multihashmap32_create (32);
736 * Install server (service) handlers and start listening to clients.
741 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
742 GNUNET_SERVER_connect_notify (server_handle, &handle_client_connect, NULL);
743 GNUNET_SERVER_disconnect_notify (server_handle, &handle_client_disconnect,
745 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
750 GNUNET_SERVER_resume (server_handle);
762 GNUNET_SERVER_notification_context_destroy (nc);
769 * Get a channel from a client.
771 * @param c Client to check.
772 * @param chid Channel ID, must be local (> 0x800...).
774 * @return non-NULL if channel exists in the clients lists
777 GML_channel_get (struct MeshClient *c, MESH_ChannelNumber chid)
779 struct GNUNET_CONTAINER_MultiHashMap32 *map;
781 if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
784 LOG (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
788 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
789 map = c->incoming_channels;
790 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
791 map = c->own_channels;
800 LOG (GNUNET_ERROR_TYPE_DEBUG,
801 "Client %s does no t have a valid map for CHID %X\n",
805 return GNUNET_CONTAINER_multihashmap32_get (map, chid);
810 * Add a channel to a client
812 * @param client Client.
813 * @param chid Channel ID.
817 GML_channel_add (struct MeshClient *client,
819 struct MeshChannel *ch)
821 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
822 GNUNET_CONTAINER_multihashmap32_put (client->incoming_channels, chid, ch,
823 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
824 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
825 GNUNET_CONTAINER_multihashmap32_put (client->own_channels, chid, ch,
826 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
833 * Remove a channel from a client.
835 * @param client Client.
836 * @param chid Channel ID.
840 GML_channel_remove (struct MeshClient *client,
842 struct MeshChannel *ch)
844 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
845 GNUNET_break (GNUNET_YES ==
846 GNUNET_CONTAINER_multihashmap32_remove (client->incoming_channels,
848 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= chid)
849 GNUNET_break (GNUNET_YES ==
850 GNUNET_CONTAINER_multihashmap32_remove (client->own_channels,
858 * Get the tunnel's next free local channel ID.
862 * @return LID of a channel free to use.
865 GML_get_next_chid (struct MeshClient *c)
867 MESH_ChannelNumber chid;
869 while (NULL != GML_channel_get (c, c->next_chid))
871 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %u exists...\n", c->next_chid);
872 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
875 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
882 * Check if client has registered with the service and has not disconnected
884 * @param client the client to check
886 * @return non-NULL if client exists in the global DLL
889 GML_client_get (struct GNUNET_SERVER_Client *client)
891 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
895 * Find a client that has opened a port
897 * @param port Port to check.
899 * @return non-NULL if a client has the port.
902 GML_client_get_by_port (uint32_t port)
904 return GNUNET_CONTAINER_multihashmap32_get (ports, port);
909 * Deletes a channel from a client (either owner or destination).
911 * @param c Client whose tunnel to delete.
912 * @param ch Channel which should be deleted.
913 * @param id Channel ID.
916 GML_client_delete_channel (struct MeshClient *c,
917 struct MeshChannel *ch,
918 MESH_ChannelNumber id)
922 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= id)
924 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
926 if (GNUNET_YES != res)
927 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel dest KO\n");
929 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= id)
931 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
933 if (GNUNET_YES != res)
934 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel root KO\n");
943 * Build a local ACK message and send it to a local client, if needed.
945 * If the client was already allowed to send data, do nothing.
947 * @param c Client to whom send the ACK.
948 * @param id Channel ID to use
951 GML_send_ack (struct MeshClient *c, MESH_ChannelNumber id)
953 struct GNUNET_MESH_LocalAck msg;
955 LOG (GNUNET_ERROR_TYPE_DEBUG,
956 "send local %s ack on %X towards %p\n",
957 id < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV ? "FWD" : "BCK", id, c);
959 msg.header.size = htons (sizeof (msg));
960 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
961 msg.channel_id = htonl (id);
962 GNUNET_SERVER_notification_context_unicast (nc,
971 * Build a local channel NACK message and send it to a local client.
973 * @param c Client to whom send the NACK.
974 * @param id Channel ID to use
977 GML_send_nack (struct MeshClient *c, MESH_ChannelNumber id)
979 struct GNUNET_MESH_LocalAck msg;
981 LOG (GNUNET_ERROR_TYPE_DEBUG,
982 "send local nack on %X towards %p\n",
985 msg.header.size = htons (sizeof (msg));
986 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_NACK);
987 msg.channel_id = htonl (id);
988 GNUNET_SERVER_notification_context_unicast (nc,
997 * Notify the client that a new incoming channel was created.
999 * @param c Client to notify.
1000 * @param id Channel ID.
1001 * @param port Channel's destination port.
1002 * @param opt Options (bit array).
1003 * @param peer Origin peer.
1006 GML_send_channel_create (struct MeshClient *c,
1007 uint32_t id, uint32_t port, uint32_t opt,
1008 const struct GNUNET_PeerIdentity *peer)
1010 struct GNUNET_MESH_ChannelMessage msg;
1012 msg.header.size = htons (sizeof (msg));
1013 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE);
1014 msg.channel_id = htonl (id);
1015 msg.port = htonl (port);
1016 msg.opt = htonl (opt);
1018 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1019 &msg.header, GNUNET_NO);
1024 * Notify a client that a channel is no longer valid.
1027 * @param id ID of the channel that is destroyed.
1030 GML_send_channel_destroy (struct MeshClient *c, uint32_t id)
1032 struct GNUNET_MESH_ChannelMessage msg;
1039 if (GNUNET_YES == c->shutting_down)
1041 msg.header.size = htons (sizeof (msg));
1042 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY);
1043 msg.channel_id = htonl (id);
1044 msg.port = htonl (0);
1045 memset (&msg.peer, 0, sizeof (msg.peer));
1046 msg.opt = htonl (0);
1047 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1048 &msg.header, GNUNET_NO);
1053 * Modify the mesh message ID from global to local and send to client.
1055 * @param c Client to send to.
1056 * @param msg Message to modify and send.
1057 * @param id Channel ID to use (c can be both owner and client).
1060 GML_send_data (struct MeshClient *c,
1061 const struct GNUNET_MESH_Data *msg,
1062 MESH_ChannelNumber id)
1064 struct GNUNET_MESH_LocalData *copy;
1065 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
1066 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
1068 if (size < sizeof (struct GNUNET_MessageHeader))
1070 GNUNET_break_op (0);
1078 copy = (struct GNUNET_MESH_LocalData *) cbuf;
1079 memcpy (©[1], &msg[1], size);
1080 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
1081 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
1082 copy->id = htonl (id);
1083 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1084 ©->header, GNUNET_NO);
1089 * Get the static string to represent a client.
1093 * @return Static string for the client.
1096 GML_2s (const struct MeshClient *c)
1098 static char buf[32];
1100 sprintf (buf, "%u", c->id);