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 * Handler for client disconnection
198 * @param client identification of the client; NULL
199 * for the last call when the server is destroyed
202 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
204 struct MeshClient *c;
206 LOG (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
209 LOG (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
213 c = client_get (client);
216 LOG (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
218 GNUNET_SERVER_client_drop (c->handle);
219 c->shutting_down = GNUNET_YES;
220 if (NULL != c->own_channels)
222 GNUNET_CONTAINER_multihashmap32_iterate (c->own_channels,
223 &channel_destroy_iterator, c);
224 GNUNET_CONTAINER_multihashmap32_destroy (c->own_channels);
227 if (NULL != c->incoming_channels)
229 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_channels,
230 &channel_destroy_iterator, c);
231 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_channels);
234 if (NULL != c->ports)
236 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
237 &client_release_ports, c);
238 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
240 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
241 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
242 LOG (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
247 LOG (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
249 LOG (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
255 * Handler for new clients
258 * @param client identification of the client
259 * @param message the actual message, which includes messages the client wants
262 handle_new_client (void *cls, struct GNUNET_SERVER_Client *client,
263 const struct GNUNET_MessageHeader *message)
265 struct GNUNET_MESH_ClientConnect *cc_msg;
266 struct MeshClient *c;
271 LOG (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
273 /* Check data sanity */
274 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
275 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
276 if (0 != (size % sizeof (uint32_t)))
279 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
282 size /= sizeof (uint32_t);
284 /* Initialize new client structure */
285 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
286 LOG (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
287 LOG (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
292 p = (uint32_t *) &cc_msg[1];
293 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
294 for (i = 0; i < size; i++)
297 LOG (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
299 /* store in client's hashmap */
300 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
301 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
302 /* store in global hashmap */
303 /* FIXME only allow one client to have the port open,
304 * have a backup hashmap with waiting clients */
305 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
306 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
310 c->own_channels = GNUNET_CONTAINER_multihashmap32_create (32);
311 c->incoming_channels = GNUNET_CONTAINER_multihashmap32_create (32);
312 GNUNET_SERVER_notification_context_add (nc, client);
313 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
315 GNUNET_SERVER_receive_done (client, GNUNET_OK);
316 LOG (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
321 * Handler for requests of new tunnels
323 * @param cls Closure.
324 * @param client Identification of the client.
325 * @param message The actual message.
328 handle_channel_create (void *cls, struct GNUNET_SERVER_Client *client,
329 const struct GNUNET_MessageHeader *message)
331 struct GNUNET_MESH_ChannelMessage *msg;
332 struct MeshPeer *peer;
333 struct MeshTunnel2 *t;
334 struct MeshChannel *ch;
335 struct MeshClient *c;
336 MESH_ChannelNumber chid;
338 LOG (GNUNET_ERROR_TYPE_DEBUG, "new channel requested\n");
340 /* Sanity check for client registration */
341 if (NULL == (c = client_get (client)))
344 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
347 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
349 /* Message size sanity check */
350 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
353 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
357 msg = (struct GNUNET_MESH_ChannelMessage *) message;
358 LOG (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n",
359 GNUNET_i2s (&msg->peer), ntohl (msg->port));
360 chid = ntohl (msg->channel_id);
362 /* Sanity check for duplicate channel IDs */
363 if (NULL != channel_get_by_local_id (c, chid))
366 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
370 peer = peer_get (&msg->peer);
371 if (NULL == peer->tunnel)
373 peer->tunnel = tunnel_new ();
374 peer->tunnel->peer = peer;
375 if (peer->id == myid)
377 tunnel_change_state (peer->tunnel, MESH_TUNNEL_READY);
387 ch = channel_new (t, c, chid);
391 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
394 ch->port = ntohl (msg->port);
395 channel_set_options (ch, ntohl (msg->opt));
397 /* In unreliable channels, we'll use the DLL to buffer BCK data */
398 ch->root_rel = GNUNET_new (struct MeshChannelReliability);
399 ch->root_rel->ch = ch;
400 ch->root_rel->expected_delay = MESH_RETRANSMIT_TIME;
402 LOG (GNUNET_ERROR_TYPE_DEBUG, "CREATED CHANNEL %s[%x]:%u (%x)\n",
403 peer2s (t->peer), ch->gid, ch->port, ch->lid_root);
405 /* Send create channel */
407 struct GNUNET_MESH_ChannelCreate msgcc;
409 msgcc.header.size = htons (sizeof (msgcc));
410 msgcc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE);
411 msgcc.chid = htonl (ch->gid);
412 msgcc.port = msg->port;
413 msgcc.opt = msg->opt;
415 GMT_queue_data (t, ch, &msgcc.header, GNUNET_YES);
418 GNUNET_SERVER_receive_done (client, GNUNET_OK);
424 * Handler for requests of deleting tunnels
427 * @param client identification of the client
428 * @param message the actual message
431 handle_channel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
432 const struct GNUNET_MessageHeader *message)
434 struct GNUNET_MESH_ChannelMessage *msg;
435 struct MeshClient *c;
436 struct MeshChannel *ch;
437 MESH_ChannelNumber chid;
439 LOG (GNUNET_ERROR_TYPE_DEBUG,
440 "Got a DESTROY CHANNEL from client!\n");
442 /* Sanity check for client registration */
443 if (NULL == (c = GML_client_get (client)))
446 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
449 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
451 /* Message sanity check */
452 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
455 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
459 msg = (struct GNUNET_MESH_ChannelMessage *) message;
461 /* Retrieve tunnel */
462 chid = ntohl (msg->channel_id);
463 ch = GML_channel_get (c, chid);
466 LOG (GNUNET_ERROR_TYPE_ERROR, " channel %X not found\n", chid);
468 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
472 GMCH_handle_local_destroy (ch, c, chid);
474 GNUNET_SERVER_receive_done (client, GNUNET_OK);
480 * Handler for client traffic
483 * @param client identification of the client
484 * @param message the actual message
487 handle_data (void *cls, struct GNUNET_SERVER_Client *client,
488 const struct GNUNET_MessageHeader *message)
490 struct GNUNET_MESH_LocalData *msg;
491 struct MeshClient *c;
492 struct MeshChannel *ch;
493 MESH_ChannelNumber chid;
497 LOG (GNUNET_ERROR_TYPE_DEBUG,
498 "Got data from a client!\n");
500 /* Sanity check for client registration */
501 if (NULL == (c = GML_client_get (client)))
504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
507 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
509 msg = (struct GNUNET_MESH_LocalData *) message;
511 /* Sanity check for message size */
512 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
513 if (size < sizeof (struct GNUNET_MessageHeader))
516 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
520 /* Channel exists? */
521 chid = ntohl (msg->id);
522 fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
523 ch = GML_channel_get (c, chid);
527 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
532 GMCH_handle_local_data (ch, c,
533 (struct GNUNET_MessageHeader *)&msg[1], fwd))
535 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
539 LOG (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
540 GNUNET_SERVER_receive_done (client, GNUNET_OK);
547 * Handler for client's ACKs for payload traffic.
549 * @param cls Closure (unused).
550 * @param client Identification of the client.
551 * @param message The actual message.
554 handle_ack (void *cls, struct GNUNET_SERVER_Client *client,
555 const struct GNUNET_MessageHeader *message)
557 struct GNUNET_MESH_LocalAck *msg;
558 struct MeshChannel *ch;
559 struct MeshClient *c;
560 MESH_ChannelNumber chid;
563 LOG (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
565 /* Sanity check for client registration */
566 if (NULL == (c = GML_client_get (client)))
569 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
572 LOG (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
574 msg = (struct GNUNET_MESH_LocalAck *) message;
576 /* Channel exists? */
577 chid = ntohl (msg->channel_id);
578 LOG (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
579 ch = GML_channel_get (c, chid);
580 LOG (GNUNET_ERROR_TYPE_DEBUG, " -- ch %p\n", ch);
584 LOG (GNUNET_ERROR_TYPE_WARNING, "Channel %X unknown.\n", chid);
585 LOG (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
586 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
590 /* If client is root, the ACK is going FWD, therefore this is "BCK". */
591 /* If client is dest, the ACK is going BCK, therefore this is "FWD" */
592 fwd = chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
594 GMCH_handle_local_ack (ch, fwd);
595 GNUNET_SERVER_receive_done (client, GNUNET_OK);
602 * Iterator over all tunnels to send a monitoring client info about each tunnel.
604 * @param cls Closure (client handle).
605 * @param key Key (hashed tunnel ID, unused).
606 * @param value Tunnel info.
608 * @return GNUNET_YES, to keep iterating.
611 // monitor_all_tunnels_iterator (void *cls,
612 // const struct GNUNET_HashCode * key,
615 // struct GNUNET_SERVER_Client *client = cls;
616 // struct MeshChannel *ch = value;
617 // struct GNUNET_MESH_LocalMonitor *msg;
619 // msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
620 // msg->channel_id = htonl (ch->gid);
621 // msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
622 // msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
624 // LOG (GNUNET_ERROR_TYPE_INFO,
625 // "* sending info about tunnel %s\n",
626 // GNUNET_i2s (&msg->owner));
628 // GNUNET_SERVER_notification_context_unicast (nc, client,
629 // &msg->header, GNUNET_NO);
630 // return GNUNET_YES;
635 * Handler for client's MONITOR request.
637 * @param cls Closure (unused).
638 * @param client Identification of the client.
639 * @param message The actual message.
642 handle_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
643 const struct GNUNET_MessageHeader *message)
645 struct MeshClient *c;
647 /* Sanity check for client registration */
648 if (NULL == (c = GML_client_get (client)))
651 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
655 LOG (GNUNET_ERROR_TYPE_INFO,
656 "Received get tunnels request from client %u\n",
658 // GNUNET_CONTAINER_multihashmap_iterate (tunnels,
659 // monitor_all_tunnels_iterator,
661 LOG (GNUNET_ERROR_TYPE_INFO,
662 "Get tunnels request from client %u completed\n",
664 GNUNET_SERVER_receive_done (client, GNUNET_OK);
669 * Handler for client's MONITOR_TUNNEL request.
671 * @param cls Closure (unused).
672 * @param client Identification of the client.
673 * @param message The actual message.
676 handle_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
677 const struct GNUNET_MessageHeader *message)
679 const struct GNUNET_MESH_LocalMonitor *msg;
680 struct GNUNET_MESH_LocalMonitor *resp;
681 struct MeshClient *c;
682 struct MeshChannel *ch;
684 /* Sanity check for client registration */
685 if (NULL == (c = GML_client_get (client)))
688 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
692 msg = (struct GNUNET_MESH_LocalMonitor *) message;
693 LOG (GNUNET_ERROR_TYPE_INFO,
694 "Received tunnel info request from client %u for tunnel %s[%X]\n",
697 ntohl (msg->channel_id));
698 // ch = channel_get (&msg->owner, ntohl (msg->channel_id));
702 /* We don't know the tunnel */
703 struct GNUNET_MESH_LocalMonitor warn;
706 GNUNET_SERVER_notification_context_unicast (nc, client,
709 GNUNET_SERVER_receive_done (client, GNUNET_OK);
713 /* Initialize context */
714 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
716 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
717 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
718 &resp->header, GNUNET_NO);
721 LOG (GNUNET_ERROR_TYPE_INFO,
722 "Monitor tunnel request from client %u completed\n",
724 GNUNET_SERVER_receive_done (client, GNUNET_OK);
729 * Functions to handle messages from clients
731 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
732 {&handle_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
733 {&handle_channel_create, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE,
734 sizeof (struct GNUNET_MESH_ChannelMessage)},
735 {&handle_channel_destroy, NULL, GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY,
736 sizeof (struct GNUNET_MESH_ChannelMessage)},
737 {&handle_data, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
738 {&handle_ack, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
739 sizeof (struct GNUNET_MESH_LocalAck)},
740 {&handle_get_tunnels, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
741 sizeof (struct GNUNET_MessageHeader)},
742 {&handle_show_tunnel, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
743 sizeof (struct GNUNET_MESH_LocalMonitor)},
749 /******************************************************************************/
750 /******************************** API ***********************************/
751 /******************************************************************************/
754 * Initialize server subsystem.
756 * @param handle Server handle.
759 GML_init (struct GNUNET_SERVER_Handle *handle)
761 server_handle = handle;
762 GNUNET_SERVER_suspend (server_handle);
763 ports = GNUNET_CONTAINER_multihashmap32_create (32);
768 * Install server (service) handlers and start listening to clients.
773 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
774 GNUNET_SERVER_connect_notify (server_handle, &handle_client_connect, NULL);
775 GNUNET_SERVER_disconnect_notify (server_handle, &handle_client_disconnect,
777 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
782 GNUNET_SERVER_resume (server_handle);
794 GNUNET_SERVER_notification_context_destroy (nc);
801 * Get a chennel from a client
803 * @param c the client to check
804 * @param chid Channel ID, must be local (> 0x800...)
806 * @return non-NULL if channel exists in the clients lists
809 GML_channel_get (struct MeshClient *c, MESH_ChannelNumber chid)
811 if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
814 LOG (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
817 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
818 return GNUNET_CONTAINER_multihashmap32_get (c->incoming_channels, chid);
819 return GNUNET_CONTAINER_multihashmap32_get (c->own_channels, chid);
824 * Add a channel to a client
826 * @param client Client.
827 * @param chid Channel ID.
831 GML_channel_add (struct MeshClient *client,
833 struct MeshChannel *ch)
835 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
836 GNUNET_CONTAINER_multihashmap32_put (client->incoming_channels, chid, ch,
837 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
838 else if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
839 GNUNET_CONTAINER_multihashmap32_put (client->own_channels, chid, ch,
840 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
847 * Remove a channel from a client
849 * @param client Client.
850 * @param chid Channel ID.
854 GML_channel_remove (struct MeshClient *client,
856 struct MeshChannel *ch)
858 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
859 GNUNET_CONTAINER_multihashmap32_remove (client->incoming_channels, chid, ch);
860 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= chid)
861 GNUNET_CONTAINER_multihashmap32_remove (client->own_channels, chid, ch);
868 * Get the tunnel's next free local channel ID.
872 * @return LID of a channel free to use.
875 GML_get_next_chid (struct MeshClient *c)
877 MESH_ChannelNumber chid;
879 while (NULL != GML_channel_get (c, c->next_chid))
881 LOG (GNUNET_ERROR_TYPE_DEBUG, "Channel %u exists...\n", c->next_chid);
882 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
885 c->next_chid = (c->next_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
892 * Check if client has registered with the service and has not disconnected
894 * @param client the client to check
896 * @return non-NULL if client exists in the global DLL
899 GML_client_get (struct GNUNET_SERVER_Client *client)
901 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
905 * Find a client that has opened a port
907 * @param port Port to check.
909 * @return non-NULL if a client has the port.
912 GML_client_get_by_port (uint32_t port)
914 return GNUNET_CONTAINER_multihashmap32_get (ports, port);
919 * Deletes a channel from a client (either owner or destination).
921 * @param c Client whose tunnel to delete.
922 * @param ch Channel which should be deleted.
923 * @param id Channel ID.
926 GML_client_delete_channel (struct MeshClient *c,
927 struct MeshChannel *ch,
928 MESH_ChannelNumber id)
932 if (GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= id)
934 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
936 if (GNUNET_YES != res)
937 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel dest KO\n");
939 else if (GNUNET_MESH_LOCAL_CHANNEL_ID_CLI <= id)
941 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
943 if (GNUNET_YES != res)
944 LOG (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel root KO\n");
953 * Build a local ACK message and send it to a local client, if needed.
955 * If the client was already allowed to send data, do nothing.
957 * @param c Client to whom send the ACK.
958 * @param id Channel ID to use
961 GML_send_ack (struct MeshClient *c, MESH_ChannelNumber id)
963 struct GNUNET_MESH_LocalAck msg;
965 LOG (GNUNET_ERROR_TYPE_DEBUG,
966 "send local %s ack on %X towards %p\n",
967 id < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV ? "FWD" : "BCK", id, c);
969 msg.header.size = htons (sizeof (msg));
970 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
971 msg.channel_id = htonl (id);
972 GNUNET_SERVER_notification_context_unicast (nc,
981 * Notify the client that a new incoming channel was created.
983 * @param ch Channel that was created.
986 GML_send_channel_create (struct MeshClient *c,
987 uint32_t id, uint32_t port, uint32_t opt,
988 const struct GNUNET_PeerIdentity *peer)
990 struct GNUNET_MESH_ChannelMessage msg;
992 msg.header.size = htons (sizeof (msg));
993 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
994 msg.channel_id = htonl (id);
995 msg.port = htonl (port);
996 msg.opt = htonl (opt);
998 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
999 &msg.header, GNUNET_NO);
1004 * Notify a client that a channel is no longer valid.
1007 * @param id ID of the channel that is destroyed.
1010 GML_send_channel_destroy (struct MeshClient *c, uint32_t id)
1012 struct GNUNET_MESH_ChannelMessage msg;
1019 msg.header.size = htons (sizeof (msg));
1020 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1021 msg.channel_id = htonl (id);
1022 msg.port = htonl (0);
1023 memset (&msg.peer, 0, sizeof (msg.peer));
1024 msg.opt = htonl (0);
1025 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1026 &msg.header, GNUNET_NO);
1031 * Modify the mesh message ID from global to local and send to client.
1033 * @param c Client to send to.
1034 * @param msg Message to modify and send.
1035 * @param id Channel ID to use (c can be both owner and client).
1038 GML_send_data (struct MeshClient *c,
1039 const struct GNUNET_MESH_Data *msg,
1040 MESH_ChannelNumber id)
1042 struct GNUNET_MESH_LocalData *copy;
1043 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
1044 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
1046 if (size < sizeof (struct GNUNET_MessageHeader))
1048 GNUNET_break_op (0);
1056 copy = (struct GNUNET_MESH_LocalData *) cbuf;
1057 memcpy (©[1], &msg[1], size);
1058 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
1059 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
1060 copy->id = htonl (id);
1061 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1062 ©->header, GNUNET_NO);
1067 * Get the static string to represent a client.
1071 * @return Static string for the client.
1074 GML_2s (const struct MeshClient *c)
1076 static char buf[32];
1078 sprintf (buf, "%u", c->id);