git.meshlink.io Git - meshlink/blob - src/net.c

   1 /*
   2     net.c -- most of the network code
   3     Copyright (C) 2014-2017 Guus Sliepen <guus@meshlink.io>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License along
  16     with this program; if not, write to the Free Software Foundation, Inc.,
  17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "system.h"
  21
  22 #include "utils.h"
  23 #include "conf.h"
  24 #include "connection.h"
  25 #include "graph.h"
  26 #include "logger.h"
  27 #include "meshlink_internal.h"
  28 #include "meta.h"
  29 #include "net.h"
  30 #include "netutl.h"
  31 #include "protocol.h"
  32 #include "xalloc.h"
  33
  34 #include <assert.h>
  35
  36 #if !defined(min)
  37 static inline int min(int a, int b) {
  38         return a < b ? a : b;
  39 }
  40 #endif
  41
  42 static const int default_timeout = 5;
  43 static const int default_interval = 60;
  44
  45 /*
  46   Terminate a connection:
  47   - Mark it as inactive
  48   - Remove the edge representing this connection
  49   - Kill it with fire
  50   - Check if we need to retry making an outgoing connection
  51 */
  52 void terminate_connection(meshlink_handle_t *mesh, connection_t *c, bool report) {
  53         logger(mesh, MESHLINK_INFO, "Closing connection with %s", c->name);
  54
  55         c->status.active = false;
  56
  57         if(c->node && c->node->connection == c) {
  58                 c->node->connection = NULL;
  59         }
  60
  61         if(c->edge) {
  62                 if(report) {
  63                         send_del_edge(mesh, mesh->everyone, c->edge, 0);
  64                 }
  65
  66                 edge_del(mesh, c->edge);
  67                 c->edge = NULL;
  68
  69                 /* Run MST and SSSP algorithms */
  70
  71                 graph(mesh);
  72
  73                 /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
  74
  75                 if(report && c->node && !c->node->status.reachable) {
  76                         edge_t *e;
  77                         e = lookup_edge(c->node, mesh->self);
  78
  79                         if(e) {
  80                                 send_del_edge(mesh, mesh->everyone, e, 0);
  81                                 edge_del(mesh, e);
  82                         }
  83                 }
  84         }
  85
  86         outgoing_t *outgoing = c->outgoing;
  87         connection_del(mesh, c);
  88
  89         /* Check if this was our outgoing connection */
  90
  91         if(outgoing) {
  92                 do_outgoing_connection(mesh, outgoing);
  93         }
  94
  95 #ifndef HAVE_MINGW
  96         /* Clean up dead proxy processes */
  97
  98         while(waitpid(-1, NULL, WNOHANG) > 0);
  99
 100 #endif
 101 }
 102
 103 /*
 104   Check if the other end is active.
 105   If we have sent packets, but didn't receive any,
 106   then possibly the other end is dead. We send a
 107   PING request over the meta connection. If the other
 108   end does not reply in time, we consider them dead
 109   and close the connection.
 110 */
 111 static void timeout_handler(event_loop_t *loop, void *data) {
 112         assert(data);
 113
 114         meshlink_handle_t *mesh = loop->data;
 115         logger(mesh, MESHLINK_DEBUG, "timeout_handler()");
 116
 117         for list_each(connection_t, c, mesh->connections) {
 118                 int pingtimeout = c->node ? mesh->dev_class_traits[c->node->devclass].pingtimeout : default_timeout;
 119                 int pinginterval = c->node ? mesh->dev_class_traits[c->node->devclass].pinginterval : default_interval;
 120
 121                 if(c->outgoing && c->outgoing->timeout < 5) {
 122                         pingtimeout = 1;
 123                 }
 124
 125                 // Also make sure that if outstanding key requests for the UDP counterpart of a connection has timed out, we restart it.
 126                 if(c->node) {
 127                         if(c->node->status.waitingforkey && c->node->last_req_key + pingtimeout <= mesh->loop.now.tv_sec) {
 128                                 send_req_key(mesh, c->node);
 129                         }
 130                 }
 131
 132                 if(c->last_ping_time + pingtimeout <= mesh->loop.now.tv_sec) {
 133                         if(c->status.active) {
 134                                 if(c->status.pinged) {
 135                                         logger(mesh, MESHLINK_INFO, "%s didn't respond to PING in %ld seconds", c->name, (long)mesh->loop.now.tv_sec - c->last_ping_time);
 136                                 } else if(c->last_ping_time + pinginterval <= mesh->loop.now.tv_sec) {
 137                                         send_ping(mesh, c);
 138                                         continue;
 139                                 } else {
 140                                         continue;
 141                                 }
 142                         } else {
 143                                 if(c->status.connecting) {
 144                                         logger(mesh, MESHLINK_WARNING, "Timeout while connecting to %s", c->name);
 145                                 } else {
 146                                         logger(mesh, MESHLINK_WARNING, "Timeout from %s during authentication", c->name);
 147                                 }
 148                         }
 149
 150                         terminate_connection(mesh, c, c->status.active);
 151                 }
 152         }
 153
 154         timeout_set(&mesh->loop, data, &(struct timespec) {
 155                 1, prng(mesh, TIMER_FUDGE)
 156         });
 157 }
 158
 159 // devclass asc, last_successfull_connection desc
 160 static int node_compare_devclass_asc_lsc_desc(const void *a, const void *b) {
 161         const node_t *na = a, *nb = b;
 162
 163         if(na->devclass < nb->devclass) {
 164                 return -1;
 165         }
 166
 167         if(na->devclass > nb->devclass) {
 168                 return 1;
 169         }
 170
 171         if(na->last_successfull_connection == nb->last_successfull_connection) {
 172                 return 0;
 173         }
 174
 175         if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
 176                 return -1;
 177         }
 178
 179         if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
 180                 return 1;
 181         }
 182
 183         if(na < nb) {
 184                 return -1;
 185         }
 186
 187         if(na > nb) {
 188                 return 1;
 189         }
 190
 191         return 0;
 192 }
 193
 194 // last_successfull_connection desc
 195 static int node_compare_lsc_desc(const void *a, const void *b) {
 196         const node_t *na = a, *nb = b;
 197
 198         if(na->last_successfull_connection == nb->last_successfull_connection) {
 199                 return 0;
 200         }
 201
 202         if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
 203                 return -1;
 204         }
 205
 206         if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
 207                 return 1;
 208         }
 209
 210         if(na < nb) {
 211                 return -1;
 212         }
 213
 214         if(na > nb) {
 215                 return 1;
 216         }
 217
 218         return 0;
 219 }
 220
 221 // devclass desc
 222 static int node_compare_devclass_desc(const void *a, const void *b) {
 223         const node_t *na = a, *nb = b;
 224
 225         if(na->devclass < nb->devclass) {
 226                 return -1;
 227         }
 228
 229         if(na->devclass > nb->devclass) {
 230                 return 1;
 231         }
 232
 233         if(na < nb) {
 234                 return -1;
 235         }
 236
 237         if(na > nb) {
 238                 return 1;
 239         }
 240
 241         return 0;
 242 }
 243
 244
 245 /*
 246
 247 autoconnect()
 248 {
 249         timeout = 5
 250
 251         // find the best one for initial connect
 252
 253         if cur < min
 254                 newcon =
 255                         first from nodes
 256                                 where dclass <= my.dclass and !connection and (timestamp - last_retry) > retry_timeout
 257                                 order by dclass asc, last_connection desc
 258                 if newcon
 259                         timeout = 0
 260                         goto connect
 261
 262
 263         // find better nodes to connect to: in case we have less than min connections within [BACKBONE, i] and there are nodes which we are not connected to within the range
 264
 265         if min <= cur < max
 266                 j = 0
 267                 for i = BACKBONE to my.dclass
 268                         j += count(from connections where node.dclass = i)
 269                         if j < min
 270                                 newcon =
 271                                         first from nodes
 272                                                 where dclass = i and !connection and (timestamp - last_retry) > retry_timeout
 273                                                 order by last_connection desc
 274                                 if newcon
 275                                         goto connect
 276                         else
 277                                 break
 278
 279
 280         // heal partitions
 281
 282         if min <= cur < max
 283                 newcon =
 284                         first from nodes
 285                                 where dclass <= my.dclass and !reachable and (timestamp - last_retry) > retry_timeout
 286                                 order by dclass asc, last_connection desc
 287                 if newcon
 288                         goto connect
 289
 290
 291         // connect
 292
 293 connect:
 294         if newcon
 295                 connect newcon
 296
 297
 298         // disconnect outgoing connections in case we have more than min connections within [BACKBONE, i] and there are nodes which we are connected to within the range [i, PORTABLE]
 299
 300         if min < cur <= max
 301                 j = 0
 302                 for i = BACKBONE to my.dclass
 303                         j += count(from connections where node.dclass = i)
 304                         if min < j
 305                                 delcon =
 306                                         first from nodes
 307                                                 where dclass >= i and outgoing_connection
 308                                                 order by dclass desc
 309                                 if disconnect
 310                                         goto disconnect
 311                                 else
 312                                         break
 313
 314
 315         // disconnect connections in case we have more than enough connections
 316
 317         if max < cur
 318                 delcon =
 319                         first from nodes
 320                                 where outgoing_connection
 321                                 order by dclass desc
 322                 goto disconnect
 323
 324         // disconnect
 325
 326 disconnect
 327         if delcon
 328                 disconnect delcon
 329
 330
 331         // next iteration
 332         next (timeout, autoconnect)
 333
 334 }
 335
 336 */
 337
 338
 339 static void periodic_handler(event_loop_t *loop, void *data) {
 340         meshlink_handle_t *mesh = loop->data;
 341
 342         /* Check if there are too many contradicting ADD_EDGE and DEL_EDGE messages.
 343            This usually only happens when another node has the same Name as this node.
 344            If so, sleep for a short while to prevent a storm of contradicting messages.
 345         */
 346
 347         if(mesh->contradicting_del_edge > 100 && mesh->contradicting_add_edge > 100) {
 348                 logger(mesh, MESHLINK_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", mesh->sleeptime);
 349                 struct timespec ts = {mesh->sleeptime, 0};
 350                 clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
 351                 mesh->sleeptime *= 2;
 352
 353                 if(mesh->sleeptime < 0) {
 354                         mesh->sleeptime = 3600;
 355                 }
 356         } else {
 357                 mesh->sleeptime /= 2;
 358
 359                 if(mesh->sleeptime < 10) {
 360                         mesh->sleeptime = 10;
 361                 }
 362         }
 363
 364         mesh->contradicting_add_edge = 0;
 365         mesh->contradicting_del_edge = 0;
 366
 367         int timeout = default_timeout;
 368
 369         /* Check if we need to make or break connections. */
 370
 371         if(mesh->nodes->count > 1) {
 372
 373                 logger(mesh, MESHLINK_DEBUG, "--- autoconnect begin ---");
 374
 375                 int retry_timeout = min(mesh->nodes->count * default_timeout, 60);
 376
 377                 logger(mesh, MESHLINK_DEBUG, "* devclass = %d", mesh->devclass);
 378                 logger(mesh, MESHLINK_DEBUG, "* nodes = %d", mesh->nodes->count);
 379                 logger(mesh, MESHLINK_DEBUG, "* retry_timeout = %d", retry_timeout);
 380
 381
 382                 // connect disconnect nodes
 383
 384                 node_t *connect_to = NULL;
 385                 node_t *disconnect_from = NULL;
 386
 387
 388                 // get cur_connects
 389
 390                 unsigned int cur_connects = 0;
 391
 392                 for list_each(connection_t, c, mesh->connections) {
 393                         if(c->status.active) {
 394                                 cur_connects += 1;
 395                         }
 396                 }
 397
 398                 logger(mesh, MESHLINK_DEBUG, "* cur_connects = %d", cur_connects);
 399                 logger(mesh, MESHLINK_DEBUG, "* outgoings = %d", mesh->outgoings->count);
 400
 401                 // get min_connects and max_connects
 402
 403                 unsigned int min_connects = mesh->dev_class_traits[mesh->devclass].min_connects;
 404                 unsigned int max_connects = mesh->dev_class_traits[mesh->devclass].max_connects;
 405
 406                 logger(mesh, MESHLINK_DEBUG, "* min_connects = %d", min_connects);
 407                 logger(mesh, MESHLINK_DEBUG, "* max_connects = %d", max_connects);
 408
 409                 // find the best one for initial connect
 410
 411                 if(cur_connects < min_connects) {
 412                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
 413
 414                         for splay_each(node_t, n, mesh->nodes) {
 415                                 logger(mesh, MESHLINK_DEBUG, "* %s->devclass = %d", n->name, n->devclass);
 416
 417                                 if(n != mesh->self && n->devclass <= mesh->devclass && !n->connection && !n->status.blacklisted && (n->last_connect_try == 0 || (mesh->loop.now.tv_sec - n->last_connect_try) > retry_timeout)) {
 418                                         splay_insert(nodes, n);
 419                                 }
 420                         }
 421
 422                         if(nodes->head) {
 423                                 //timeout = 0;
 424                                 connect_to = (node_t *)nodes->head->data;
 425
 426                                 logger(mesh, MESHLINK_DEBUG, "* found best one for initial connect: %s", connect_to->name);
 427                         } else {
 428                                 logger(mesh, MESHLINK_DEBUG, "* could not find node for initial connect");
 429                         }
 430
 431                         splay_delete_tree(nodes);
 432                 }
 433
 434
 435                 // find better nodes to connect to
 436
 437                 if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
 438                         unsigned int connects = 0;
 439
 440                         for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
 441                                 for list_each(connection_t, c, mesh->connections) {
 442                                         if(c->status.active && c->node && c->node->devclass == devclass) {
 443                                                 connects += 1;
 444                                         }
 445                                 }
 446
 447                                 if(connects < min_connects) {
 448                                         splay_tree_t *nodes = splay_alloc_tree(node_compare_lsc_desc, NULL);
 449
 450                                         for splay_each(node_t, n, mesh->nodes) {
 451                                                 if(n != mesh->self && n->devclass == devclass && !n->connection && !n->status.blacklisted && (n->last_connect_try == 0 || (mesh->loop.now.tv_sec - n->last_connect_try) > retry_timeout)) {
 452                                                         splay_insert(nodes, n);
 453                                                 }
 454                                         }
 455
 456                                         if(nodes->head) {
 457                                                 logger(mesh, MESHLINK_DEBUG, "* found better node");
 458                                                 connect_to = (node_t *)nodes->head->data;
 459
 460                                                 splay_delete_tree(nodes);
 461                                                 break;
 462                                         }
 463
 464                                         splay_delete_tree(nodes);
 465                                 } else {
 466                                         break;
 467                                 }
 468                         }
 469
 470                         if(!connect_to) {
 471                                 logger(mesh, MESHLINK_DEBUG, "* could not find better nodes");
 472                         }
 473                 }
 474
 475
 476                 // heal partitions
 477
 478                 if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
 479                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
 480
 481                         for splay_each(node_t, n, mesh->nodes) {
 482                                 if(n != mesh->self && n->devclass <= mesh->devclass && !n->status.reachable && !n->status.blacklisted && (n->last_connect_try == 0 || (mesh->loop.now.tv_sec - n->last_connect_try) > retry_timeout)) {
 483                                         splay_insert(nodes, n);
 484                                 }
 485                         }
 486
 487                         if(nodes->head) {
 488                                 logger(mesh, MESHLINK_DEBUG, "* try to heal partition");
 489                                 connect_to = (node_t *)nodes->head->data;
 490                         } else {
 491                                 logger(mesh, MESHLINK_DEBUG, "* could not find nodes for partition healing");
 492                         }
 493
 494                         splay_delete_tree(nodes);
 495                 }
 496
 497
 498                 // perform connect
 499
 500                 if(connect_to && !connect_to->connection) {
 501                         connect_to->last_connect_try = mesh->loop.now.tv_sec;
 502                         logger(mesh, MESHLINK_DEBUG, "Autoconnect trying to connect to %s", connect_to->name);
 503
 504                         /* check if there is already a connection attempt to this node */
 505                         bool skip = false;
 506
 507                         for list_each(outgoing_t, outgoing, mesh->outgoings) {
 508                                 if(outgoing->node == connect_to) {
 509                                         logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since it is an outgoing connection already");
 510                                         skip = true;
 511                                         break;
 512                                 }
 513                         }
 514
 515                         if(!connect_to->status.reachable && !node_read_public_key(mesh, connect_to)) {
 516                                 logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since we don't know this node's public key");
 517                                 skip = true;
 518                         }
 519
 520                         if(!skip) {
 521                                 logger(mesh, MESHLINK_DEBUG, "Autoconnecting to %s", connect_to->name);
 522                                 outgoing_t *outgoing = xzalloc(sizeof(outgoing_t));
 523                                 outgoing->node = connect_to;
 524                                 list_insert_tail(mesh->outgoings, outgoing);
 525                                 setup_outgoing_connection(mesh, outgoing);
 526                         }
 527                 }
 528
 529
 530                 // disconnect suboptimal outgoing connections
 531
 532                 if(min_connects < cur_connects /*&& cur_connects <= max_connects*/) {
 533                         unsigned int connects = 0;
 534
 535                         for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
 536                                 for list_each(connection_t, c, mesh->connections) {
 537                                         if(c->status.active && c->node && c->node->devclass == devclass) {
 538                                                 connects += 1;
 539                                         }
 540                                 }
 541
 542                                 if(min_connects < connects) {
 543                                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
 544
 545                                         for list_each(connection_t, c, mesh->connections) {
 546                                                 if(c->outgoing && c->node && c->node->devclass >= devclass) {
 547                                                         splay_insert(nodes, c->node);
 548                                                 }
 549                                         }
 550
 551                                         if(nodes->head) {
 552                                                 logger(mesh, MESHLINK_DEBUG, "* disconnect suboptimal outgoing connection");
 553                                                 disconnect_from = (node_t *)nodes->head->data;
 554                                         }
 555
 556                                         splay_delete_tree(nodes);
 557                                         break;
 558                                 }
 559                         }
 560
 561                         if(!disconnect_from) {
 562                                 logger(mesh, MESHLINK_DEBUG, "* no suboptimal outgoing connections");
 563                         }
 564                 }
 565
 566
 567                 // disconnect connections (too many connections)
 568
 569                 if(!disconnect_from && max_connects < cur_connects) {
 570                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
 571
 572                         for list_each(connection_t, c, mesh->connections) {
 573                                 if(c->status.active && c->node) {
 574                                         splay_insert(nodes, c->node);
 575                                 }
 576                         }
 577
 578                         if(nodes->head) {
 579                                 logger(mesh, MESHLINK_DEBUG, "* disconnect connection (too many connections)");
 580
 581                                 //timeout = 0;
 582                                 disconnect_from = (node_t *)nodes->head->data;
 583                         } else {
 584                                 logger(mesh, MESHLINK_DEBUG, "* no node we want to disconnect, even though we have too many connections");
 585                         }
 586
 587                         splay_delete_tree(nodes);
 588                 }
 589
 590
 591                 // perform disconnect
 592
 593                 if(disconnect_from && disconnect_from->connection) {
 594                         logger(mesh, MESHLINK_DEBUG, "Autodisconnecting from %s", disconnect_from->connection->name);
 595                         list_delete(mesh->outgoings, disconnect_from->connection->outgoing);
 596                         disconnect_from->connection->outgoing = NULL;
 597                         terminate_connection(mesh, disconnect_from->connection, disconnect_from->connection->status.active);
 598                 }
 599
 600                 // reduce timeout if we don't have enough connections + outgoings
 601                 if(cur_connects + mesh->outgoings->count < 3) {
 602                         timeout = 1;
 603                 }
 604
 605                 // done!
 606
 607                 logger(mesh, MESHLINK_DEBUG, "--- autoconnect end ---");
 608         }
 609
 610         for splay_each(node_t, n, mesh->nodes) {
 611                 if(n->status.dirty) {
 612                         if(node_write_config(mesh, n)) {
 613                                 logger(mesh, MESHLINK_DEBUG, "Could not update %s", n->name);
 614                         }
 615
 616                         n->status.dirty = false;
 617                 }
 618         }
 619
 620         timeout_set(&mesh->loop, data, &(struct timespec) {
 621                 timeout, prng(mesh, TIMER_FUDGE)
 622         });
 623 }
 624
 625 void handle_meta_connection_data(meshlink_handle_t *mesh, connection_t *c) {
 626         if(!receive_meta(mesh, c)) {
 627                 terminate_connection(mesh, c, c->status.active);
 628                 return;
 629         }
 630 }
 631
 632 void retry(meshlink_handle_t *mesh) {
 633         /* Reset the reconnection timers for all outgoing connections */
 634         for list_each(outgoing_t, outgoing, mesh->outgoings) {
 635                 outgoing->timeout = 0;
 636
 637                 if(outgoing->ev.cb) {
 638                         timeout_set(&mesh->loop, &outgoing->ev, &(struct timespec) {
 639                                 0, 0
 640                         });
 641                 }
 642         }
 643
 644         /* For active connections, check if their addresses are still valid.
 645          * If yes, reset their ping timers, otherwise terminate them. */
 646         for list_each(connection_t, c, mesh->connections) {
 647                 if(!c->status.active) {
 648                         continue;
 649                 }
 650
 651                 if(!c->status.pinged) {
 652                         c->last_ping_time = 0;
 653                 }
 654
 655                 sockaddr_t sa;
 656                 socklen_t salen = sizeof(sa);
 657
 658                 if(getsockname(c->socket, &sa.sa, &salen)) {
 659                         continue;
 660                 }
 661
 662                 switch(sa.sa.sa_family) {
 663                 case AF_INET:
 664                         sa.in.sin_port = 0;
 665                         break;
 666
 667                 case AF_INET6:
 668                         sa.in6.sin6_port = 0;
 669                         break;
 670
 671                 default:
 672                         continue;
 673                 }
 674
 675                 int sock = socket(sa.sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
 676
 677                 if(sock != -1) {
 678                         continue;
 679                 }
 680
 681                 if(bind(sock, &sa.sa, salen) && errno == EADDRNOTAVAIL) {
 682                         logger(mesh, MESHLINK_DEBUG, "Local address for connection to %s no longer valid, terminating", c->name);
 683                         terminate_connection(mesh, c, c->status.active);
 684                 }
 685
 686                 closesocket(sock);
 687         }
 688
 689         /* Kick the ping timeout handler */
 690         timeout_set(&mesh->loop, &mesh->pingtimer, &(struct timespec) {
 691                 0, 0
 692         });
 693 }
 694
 695 /*
 696   this is where it all happens...
 697 */
 698 void main_loop(meshlink_handle_t *mesh) {
 699         timeout_add(&mesh->loop, &mesh->pingtimer, timeout_handler, &mesh->pingtimer, &(struct timespec) {
 700                 1, prng(mesh, TIMER_FUDGE)
 701         });
 702         timeout_add(&mesh->loop, &mesh->periodictimer, periodic_handler, &mesh->periodictimer, &(struct timespec) {
 703                 0, 0
 704         });
 705
 706         //Add signal handler
 707         mesh->datafromapp.signum = 0;
 708         signal_add(&mesh->loop, &mesh->datafromapp, meshlink_send_from_queue, mesh, mesh->datafromapp.signum);
 709
 710         if(!event_loop_run(&mesh->loop, &mesh->mutex)) {
 711                 logger(mesh, MESHLINK_ERROR, "Error while waiting for input: %s", strerror(errno));
 712                 call_error_cb(mesh, MESHLINK_ENETWORK);
 713         }
 714
 715         signal_del(&mesh->loop, &mesh->datafromapp);
 716         timeout_del(&mesh->loop, &mesh->periodictimer);
 717         timeout_del(&mesh->loop, &mesh->pingtimer);
 718 }