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 "sptps.h"
  33 #include "xalloc.h"
  34
  35 #include <assert.h>
  36
  37 #if !defined(min)
  38 static inline int min(int a, int b) {
  39         return a < b ? a : b;
  40 }
  41 #endif
  42
  43 static const int default_timeout = 5;
  44 static const int default_interval = 60;
  45
  46 /*
  47   Terminate a connection:
  48   - Mark it as inactive
  49   - Remove the edge representing this connection
  50   - Kill it with fire
  51   - Check if we need to retry making an outgoing connection
  52 */
  53 void terminate_connection(meshlink_handle_t *mesh, connection_t *c, bool report) {
  54         logger(mesh, MESHLINK_INFO, "Closing connection with %s", c->name);
  55
  56         c->status.active = false;
  57
  58         if(c->node && c->node->connection == c) {
  59                 c->node->connection = NULL;
  60         }
  61
  62         if(c->edge) {
  63                 if(report) {
  64                         send_del_edge(mesh, mesh->everyone, c->edge, 0);
  65                 }
  66
  67                 edge_del(mesh, c->edge);
  68                 c->edge = NULL;
  69
  70                 /* Run MST and SSSP algorithms */
  71
  72                 graph(mesh);
  73
  74                 /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
  75
  76                 if(report && c->node && !c->node->status.reachable) {
  77                         edge_t *e;
  78                         e = lookup_edge(c->node, mesh->self);
  79
  80                         if(e) {
  81                                 send_del_edge(mesh, mesh->everyone, e, 0);
  82                                 edge_del(mesh, e);
  83                         }
  84                 }
  85         }
  86
  87         outgoing_t *outgoing = c->outgoing;
  88         connection_del(mesh, c);
  89
  90         /* Check if this was our outgoing connection */
  91
  92         if(outgoing) {
  93                 do_outgoing_connection(mesh, outgoing);
  94         }
  95 }
  96
  97 /*
  98   Check if the other end is active.
  99   If we have sent packets, but didn't receive any,
 100   then possibly the other end is dead. We send a
 101   PING request over the meta connection. If the other
 102   end does not reply in time, we consider them dead
 103   and close the connection.
 104 */
 105 static void timeout_handler(event_loop_t *loop, void *data) {
 106         assert(data);
 107
 108         meshlink_handle_t *mesh = loop->data;
 109         logger(mesh, MESHLINK_DEBUG, "timeout_handler()");
 110
 111         for list_each(connection_t, c, mesh->connections) {
 112                 int pingtimeout = c->node ? mesh->dev_class_traits[c->node->devclass].pingtimeout : default_timeout;
 113                 int pinginterval = c->node ? mesh->dev_class_traits[c->node->devclass].pinginterval : default_interval;
 114
 115                 if(c->outgoing && c->outgoing->timeout < 5) {
 116                         pingtimeout = 1;
 117                 }
 118
 119                 // Also make sure that if outstanding key requests for the UDP counterpart of a connection has timed out, we restart it.
 120                 if(c->node) {
 121                         if(c->node->status.waitingforkey && c->node->last_req_key + pingtimeout <= mesh->loop.now.tv_sec) {
 122                                 send_req_key(mesh, c->node);
 123                         }
 124                 }
 125
 126                 if(c->last_ping_time + pingtimeout <= mesh->loop.now.tv_sec) {
 127                         if(c->status.active) {
 128                                 if(c->status.pinged) {
 129                                         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);
 130                                 } else if(c->last_ping_time + pinginterval <= mesh->loop.now.tv_sec) {
 131                                         send_ping(mesh, c);
 132                                         continue;
 133                                 } else {
 134                                         continue;
 135                                 }
 136                         } else {
 137                                 if(c->status.connecting) {
 138                                         logger(mesh, MESHLINK_WARNING, "Timeout while connecting to %s", c->name);
 139                                 } else {
 140                                         logger(mesh, MESHLINK_WARNING, "Timeout from %s during authentication", c->name);
 141                                 }
 142                         }
 143
 144                         terminate_connection(mesh, c, c->status.active);
 145                 }
 146         }
 147
 148         timeout_set(&mesh->loop, data, &(struct timespec) {
 149                 1, prng(mesh, TIMER_FUDGE)
 150         });
 151 }
 152
 153 // devclass asc, last_successfull_connection desc
 154 static int node_compare_devclass_asc_lsc_desc(const void *a, const void *b) {
 155         const node_t *na = a, *nb = b;
 156
 157         if(na->devclass < nb->devclass) {
 158                 return -1;
 159         }
 160
 161         if(na->devclass > nb->devclass) {
 162                 return 1;
 163         }
 164
 165         if(na->last_successfull_connection == nb->last_successfull_connection) {
 166                 return 0;
 167         }
 168
 169         if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
 170                 return -1;
 171         }
 172
 173         if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
 174                 return 1;
 175         }
 176
 177         if(na < nb) {
 178                 return -1;
 179         }
 180
 181         if(na > nb) {
 182                 return 1;
 183         }
 184
 185         return 0;
 186 }
 187
 188 // last_successfull_connection desc
 189 static int node_compare_lsc_desc(const void *a, const void *b) {
 190         const node_t *na = a, *nb = b;
 191
 192         if(na->last_successfull_connection == nb->last_successfull_connection) {
 193                 return 0;
 194         }
 195
 196         if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
 197                 return -1;
 198         }
 199
 200         if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
 201                 return 1;
 202         }
 203
 204         if(na < nb) {
 205                 return -1;
 206         }
 207
 208         if(na > nb) {
 209                 return 1;
 210         }
 211
 212         return 0;
 213 }
 214
 215 // devclass desc
 216 static int node_compare_devclass_desc(const void *a, const void *b) {
 217         const node_t *na = a, *nb = b;
 218
 219         if(na->devclass < nb->devclass) {
 220                 return -1;
 221         }
 222
 223         if(na->devclass > nb->devclass) {
 224                 return 1;
 225         }
 226
 227         if(na < nb) {
 228                 return -1;
 229         }
 230
 231         if(na > nb) {
 232                 return 1;
 233         }
 234
 235         return 0;
 236 }
 237
 238
 239 /*
 240
 241 autoconnect()
 242 {
 243         timeout = 5
 244
 245         // find the best one for initial connect
 246
 247         if cur < min
 248                 newcon =
 249                         first from nodes
 250                                 where dclass <= my.dclass and !connection and (timestamp - last_retry) > retry_timeout
 251                                 order by dclass asc, last_connection desc
 252                 if newcon
 253                         timeout = 0
 254                         goto connect
 255
 256
 257         // 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
 258
 259         if min <= cur < max
 260                 j = 0
 261                 for i = BACKBONE to my.dclass
 262                         j += count(from connections where node.dclass = i)
 263                         if j < min
 264                                 newcon =
 265                                         first from nodes
 266                                                 where dclass = i and !connection and (timestamp - last_retry) > retry_timeout
 267                                                 order by last_connection desc
 268                                 if newcon
 269                                         goto connect
 270                         else
 271                                 break
 272
 273
 274         // heal partitions
 275
 276         if min <= cur < max
 277                 newcon =
 278                         first from nodes
 279                                 where dclass <= my.dclass and !reachable and (timestamp - last_retry) > retry_timeout
 280                                 order by dclass asc, last_connection desc
 281                 if newcon
 282                         goto connect
 283
 284
 285         // connect
 286
 287 connect:
 288         if newcon
 289                 connect newcon
 290
 291
 292         // 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]
 293
 294         if min < cur <= max
 295                 j = 0
 296                 for i = BACKBONE to my.dclass
 297                         j += count(from connections where node.dclass = i)
 298                         if min < j
 299                                 delcon =
 300                                         first from nodes
 301                                                 where dclass >= i and outgoing_connection
 302                                                 order by dclass desc
 303                                 if disconnect
 304                                         goto disconnect
 305                                 else
 306                                         break
 307
 308
 309         // disconnect connections in case we have more than enough connections
 310
 311         if max < cur
 312                 delcon =
 313                         first from nodes
 314                                 where outgoing_connection
 315                                 order by dclass desc
 316                 goto disconnect
 317
 318         // disconnect
 319
 320 disconnect
 321         if delcon
 322                 disconnect delcon
 323
 324
 325         // next iteration
 326         next (timeout, autoconnect)
 327
 328 }
 329
 330 */
 331
 332
 333 static void periodic_handler(event_loop_t *loop, void *data) {
 334         meshlink_handle_t *mesh = loop->data;
 335
 336         /* Check if there are too many contradicting ADD_EDGE and DEL_EDGE messages.
 337            This usually only happens when another node has the same Name as this node.
 338            If so, sleep for a short while to prevent a storm of contradicting messages.
 339         */
 340
 341         if(mesh->contradicting_del_edge > 100 && mesh->contradicting_add_edge > 100) {
 342                 logger(mesh, MESHLINK_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", mesh->sleeptime);
 343                 struct timespec ts = {mesh->sleeptime, 0};
 344                 clock_nanosleep(CLOCK_MONOTONIC, 0, &ts, NULL);
 345                 mesh->sleeptime *= 2;
 346
 347                 if(mesh->sleeptime < 0) {
 348                         mesh->sleeptime = 3600;
 349                 }
 350         } else {
 351                 mesh->sleeptime /= 2;
 352
 353                 if(mesh->sleeptime < 10) {
 354                         mesh->sleeptime = 10;
 355                 }
 356         }
 357
 358         mesh->contradicting_add_edge = 0;
 359         mesh->contradicting_del_edge = 0;
 360
 361         int timeout = default_timeout;
 362
 363         /* Check if we need to make or break connections. */
 364
 365         if(mesh->nodes->count > 1) {
 366
 367                 logger(mesh, MESHLINK_DEBUG, "--- autoconnect begin ---");
 368
 369                 int retry_timeout = min(mesh->nodes->count * default_timeout, 60);
 370
 371                 logger(mesh, MESHLINK_DEBUG, "* devclass = %d", mesh->devclass);
 372                 logger(mesh, MESHLINK_DEBUG, "* nodes = %d", mesh->nodes->count);
 373                 logger(mesh, MESHLINK_DEBUG, "* retry_timeout = %d", retry_timeout);
 374
 375
 376                 // connect disconnect nodes
 377
 378                 node_t *connect_to = NULL;
 379                 node_t *disconnect_from = NULL;
 380
 381
 382                 // get cur_connects
 383
 384                 unsigned int cur_connects = 0;
 385
 386                 for list_each(connection_t, c, mesh->connections) {
 387                         if(c->status.active) {
 388                                 cur_connects += 1;
 389                         }
 390                 }
 391
 392                 logger(mesh, MESHLINK_DEBUG, "* cur_connects = %d", cur_connects);
 393                 logger(mesh, MESHLINK_DEBUG, "* outgoings = %d", mesh->outgoings->count);
 394
 395                 // get min_connects and max_connects
 396
 397                 unsigned int min_connects = mesh->dev_class_traits[mesh->devclass].min_connects;
 398                 unsigned int max_connects = mesh->dev_class_traits[mesh->devclass].max_connects;
 399
 400                 logger(mesh, MESHLINK_DEBUG, "* min_connects = %d", min_connects);
 401                 logger(mesh, MESHLINK_DEBUG, "* max_connects = %d", max_connects);
 402
 403                 // find the best one for initial connect
 404
 405                 if(cur_connects < min_connects) {
 406                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
 407
 408                         for splay_each(node_t, n, mesh->nodes) {
 409                                 logger(mesh, MESHLINK_DEBUG, "* %s->devclass = %d", n->name, n->devclass);
 410
 411                                 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)) {
 412                                         splay_insert(nodes, n);
 413                                 }
 414                         }
 415
 416                         if(nodes->head) {
 417                                 //timeout = 0;
 418                                 connect_to = (node_t *)nodes->head->data;
 419
 420                                 logger(mesh, MESHLINK_DEBUG, "* found best one for initial connect: %s", connect_to->name);
 421                         } else {
 422                                 logger(mesh, MESHLINK_DEBUG, "* could not find node for initial connect");
 423                         }
 424
 425                         splay_delete_tree(nodes);
 426                 }
 427
 428
 429                 // find better nodes to connect to
 430
 431                 if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
 432                         unsigned int connects = 0;
 433
 434                         for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
 435                                 for list_each(connection_t, c, mesh->connections) {
 436                                         if(c->status.active && c->node && c->node->devclass == devclass) {
 437                                                 connects += 1;
 438                                         }
 439                                 }
 440
 441                                 if(connects < min_connects) {
 442                                         splay_tree_t *nodes = splay_alloc_tree(node_compare_lsc_desc, NULL);
 443
 444                                         for splay_each(node_t, n, mesh->nodes) {
 445                                                 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)) {
 446                                                         splay_insert(nodes, n);
 447                                                 }
 448                                         }
 449
 450                                         if(nodes->head) {
 451                                                 logger(mesh, MESHLINK_DEBUG, "* found better node");
 452                                                 connect_to = (node_t *)nodes->head->data;
 453
 454                                                 splay_delete_tree(nodes);
 455                                                 break;
 456                                         }
 457
 458                                         splay_delete_tree(nodes);
 459                                 } else {
 460                                         break;
 461                                 }
 462                         }
 463
 464                         if(!connect_to) {
 465                                 logger(mesh, MESHLINK_DEBUG, "* could not find better nodes");
 466                         }
 467                 }
 468
 469
 470                 // heal partitions
 471
 472                 if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
 473                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
 474
 475                         for splay_each(node_t, n, mesh->nodes) {
 476                                 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)) {
 477                                         splay_insert(nodes, n);
 478                                 }
 479                         }
 480
 481                         if(nodes->head) {
 482                                 logger(mesh, MESHLINK_DEBUG, "* try to heal partition");
 483                                 connect_to = (node_t *)nodes->head->data;
 484                         } else {
 485                                 logger(mesh, MESHLINK_DEBUG, "* could not find nodes for partition healing");
 486                         }
 487
 488                         splay_delete_tree(nodes);
 489                 }
 490
 491
 492                 // perform connect
 493
 494                 if(connect_to && !connect_to->connection) {
 495                         connect_to->last_connect_try = mesh->loop.now.tv_sec;
 496                         logger(mesh, MESHLINK_DEBUG, "Autoconnect trying to connect to %s", connect_to->name);
 497
 498                         /* check if there is already a connection attempt to this node */
 499                         bool skip = false;
 500
 501                         for list_each(outgoing_t, outgoing, mesh->outgoings) {
 502                                 if(outgoing->node == connect_to) {
 503                                         logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since it is an outgoing connection already");
 504                                         skip = true;
 505                                         break;
 506                                 }
 507                         }
 508
 509                         if(!connect_to->status.reachable && !node_read_public_key(mesh, connect_to)) {
 510                                 logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since we don't know this node's public key");
 511                                 skip = true;
 512                         }
 513
 514                         if(!skip) {
 515                                 logger(mesh, MESHLINK_DEBUG, "Autoconnecting to %s", connect_to->name);
 516                                 outgoing_t *outgoing = xzalloc(sizeof(outgoing_t));
 517                                 outgoing->node = connect_to;
 518                                 list_insert_tail(mesh->outgoings, outgoing);
 519                                 setup_outgoing_connection(mesh, outgoing);
 520                         }
 521                 }
 522
 523
 524                 // disconnect suboptimal outgoing connections
 525
 526                 if(min_connects < cur_connects /*&& cur_connects <= max_connects*/) {
 527                         unsigned int connects = 0;
 528
 529                         for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
 530                                 for list_each(connection_t, c, mesh->connections) {
 531                                         if(c->status.active && c->node && c->node->devclass == devclass) {
 532                                                 connects += 1;
 533                                         }
 534                                 }
 535
 536                                 if(min_connects < connects) {
 537                                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
 538
 539                                         for list_each(connection_t, c, mesh->connections) {
 540                                                 if(c->outgoing && c->node && c->node->devclass >= devclass) {
 541                                                         splay_insert(nodes, c->node);
 542                                                 }
 543                                         }
 544
 545                                         if(nodes->head) {
 546                                                 logger(mesh, MESHLINK_DEBUG, "* disconnect suboptimal outgoing connection");
 547                                                 disconnect_from = (node_t *)nodes->head->data;
 548                                         }
 549
 550                                         splay_delete_tree(nodes);
 551                                         break;
 552                                 }
 553                         }
 554
 555                         if(!disconnect_from) {
 556                                 logger(mesh, MESHLINK_DEBUG, "* no suboptimal outgoing connections");
 557                         }
 558                 }
 559
 560
 561                 // disconnect connections (too many connections)
 562
 563                 if(!disconnect_from && max_connects < cur_connects) {
 564                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
 565
 566                         for list_each(connection_t, c, mesh->connections) {
 567                                 if(c->status.active && c->node) {
 568                                         splay_insert(nodes, c->node);
 569                                 }
 570                         }
 571
 572                         if(nodes->head) {
 573                                 logger(mesh, MESHLINK_DEBUG, "* disconnect connection (too many connections)");
 574
 575                                 //timeout = 0;
 576                                 disconnect_from = (node_t *)nodes->head->data;
 577                         } else {
 578                                 logger(mesh, MESHLINK_DEBUG, "* no node we want to disconnect, even though we have too many connections");
 579                         }
 580
 581                         splay_delete_tree(nodes);
 582                 }
 583
 584
 585                 // perform disconnect
 586
 587                 if(disconnect_from && disconnect_from->connection) {
 588                         logger(mesh, MESHLINK_DEBUG, "Autodisconnecting from %s", disconnect_from->connection->name);
 589                         list_delete(mesh->outgoings, disconnect_from->connection->outgoing);
 590                         disconnect_from->connection->outgoing = NULL;
 591                         terminate_connection(mesh, disconnect_from->connection, disconnect_from->connection->status.active);
 592                 }
 593
 594                 // reduce timeout if we don't have enough connections + outgoings
 595                 if(cur_connects + mesh->outgoings->count < 3) {
 596                         timeout = 1;
 597                 }
 598
 599                 // done!
 600
 601                 logger(mesh, MESHLINK_DEBUG, "--- autoconnect end ---");
 602         }
 603
 604         for splay_each(node_t, n, mesh->nodes) {
 605                 if(n->status.dirty) {
 606                         if(!node_write_config(mesh, n)) {
 607                                 logger(mesh, MESHLINK_DEBUG, "Could not update %s", n->name);
 608                         }
 609
 610                         n->status.dirty = false;
 611                 }
 612
 613                 if(n->status.validkey && n->last_req_key + 3600 < mesh->loop.now.tv_sec) {
 614                         logger(mesh, MESHLINK_DEBUG, "SPTPS key renewal for node %s", n->name);
 615
 616                         if(!sptps_force_kex(&n->sptps)) {
 617                                 logger(mesh, MESHLINK_ERROR, "SPTPS key renewal for node %s failed", n->name);
 618                                 n->status.validkey = false;
 619                                 sptps_stop(&n->sptps);
 620                                 n->status.waitingforkey = false;
 621                                 n->last_req_key = 0;
 622                         } else {
 623                                 n->last_req_key = mesh->loop.now.tv_sec;
 624                         }
 625                 }
 626         }
 627
 628         timeout_set(&mesh->loop, data, &(struct timespec) {
 629                 timeout, prng(mesh, TIMER_FUDGE)
 630         });
 631 }
 632
 633 void handle_meta_connection_data(meshlink_handle_t *mesh, connection_t *c) {
 634         if(!receive_meta(mesh, c)) {
 635                 terminate_connection(mesh, c, c->status.active);
 636                 return;
 637         }
 638 }
 639
 640 void retry(meshlink_handle_t *mesh) {
 641         /* Reset the reconnection timers for all outgoing connections */
 642         for list_each(outgoing_t, outgoing, mesh->outgoings) {
 643                 outgoing->timeout = 0;
 644
 645                 if(outgoing->ev.cb) {
 646                         timeout_set(&mesh->loop, &outgoing->ev, &(struct timespec) {
 647                                 0, 0
 648                         });
 649                 }
 650         }
 651
 652         /* For active connections, check if their addresses are still valid.
 653          * If yes, reset their ping timers, otherwise terminate them. */
 654         for list_each(connection_t, c, mesh->connections) {
 655                 if(!c->status.active) {
 656                         continue;
 657                 }
 658
 659                 if(!c->status.pinged) {
 660                         c->last_ping_time = 0;
 661                 }
 662
 663                 sockaddr_t sa;
 664                 socklen_t salen = sizeof(sa);
 665
 666                 if(getsockname(c->socket, &sa.sa, &salen)) {
 667                         continue;
 668                 }
 669
 670                 switch(sa.sa.sa_family) {
 671                 case AF_INET:
 672                         sa.in.sin_port = 0;
 673                         break;
 674
 675                 case AF_INET6:
 676                         sa.in6.sin6_port = 0;
 677                         break;
 678
 679                 default:
 680                         continue;
 681                 }
 682
 683                 int sock = socket(sa.sa.sa_family, SOCK_STREAM, IPPROTO_TCP);
 684
 685                 if(sock != -1) {
 686                         continue;
 687                 }
 688
 689                 if(bind(sock, &sa.sa, salen) && errno == EADDRNOTAVAIL) {
 690                         logger(mesh, MESHLINK_DEBUG, "Local address for connection to %s no longer valid, terminating", c->name);
 691                         terminate_connection(mesh, c, c->status.active);
 692                 }
 693
 694                 closesocket(sock);
 695         }
 696
 697         /* Kick the ping timeout handler */
 698         timeout_set(&mesh->loop, &mesh->pingtimer, &(struct timespec) {
 699                 0, 0
 700         });
 701 }
 702
 703 /*
 704   this is where it all happens...
 705 */
 706 void main_loop(meshlink_handle_t *mesh) {
 707         timeout_add(&mesh->loop, &mesh->pingtimer, timeout_handler, &mesh->pingtimer, &(struct timespec) {
 708                 1, prng(mesh, TIMER_FUDGE)
 709         });
 710         timeout_add(&mesh->loop, &mesh->periodictimer, periodic_handler, &mesh->periodictimer, &(struct timespec) {
 711                 0, 0
 712         });
 713
 714         //Add signal handler
 715         mesh->datafromapp.signum = 0;
 716         signal_add(&mesh->loop, &mesh->datafromapp, meshlink_send_from_queue, mesh, mesh->datafromapp.signum);
 717
 718         if(!event_loop_run(&mesh->loop, &mesh->mutex)) {
 719                 logger(mesh, MESHLINK_ERROR, "Error while waiting for input: %s", strerror(errno));
 720                 call_error_cb(mesh, MESHLINK_ENETWORK);
 721         }
 722
 723         signal_del(&mesh->loop, &mesh->datafromapp);
 724         timeout_del(&mesh->loop, &mesh->periodictimer);
 725         timeout_del(&mesh->loop, &mesh->pingtimer);
 726 }