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 /*
  43   Terminate a connection:
  44   - Mark it as inactive
  45   - Remove the edge representing this connection
  46   - Kill it with fire
  47   - Check if we need to retry making an outgoing connection
  48 */
  49 void terminate_connection(meshlink_handle_t *mesh, connection_t *c, bool report) {
  50         logger(mesh, MESHLINK_INFO, "Closing connection with %s", c->name);
  51
  52         c->status.active = false;
  53
  54         if(c->node && c->node->connection == c) {
  55                 c->node->connection = NULL;
  56         }
  57
  58         if(c->edge) {
  59                 if(report) {
  60                         send_del_edge(mesh, mesh->everyone, c->edge, 0);
  61                 }
  62
  63                 edge_del(mesh, c->edge);
  64                 c->edge = NULL;
  65
  66                 /* Run MST and SSSP algorithms */
  67
  68                 graph(mesh);
  69
  70                 /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
  71
  72                 if(report && c->node && !c->node->status.reachable) {
  73                         edge_t *e;
  74                         e = lookup_edge(c->node, mesh->self);
  75
  76                         if(e) {
  77                                 send_del_edge(mesh, mesh->everyone, e, 0);
  78                                 edge_del(mesh, e);
  79                         }
  80                 }
  81         }
  82
  83         outgoing_t *outgoing = c->outgoing;
  84         connection_del(mesh, c);
  85
  86         /* Check if this was our outgoing connection */
  87
  88         if(outgoing) {
  89                 do_outgoing_connection(mesh, outgoing);
  90         }
  91
  92 #ifndef HAVE_MINGW
  93         /* Clean up dead proxy processes */
  94
  95         while(waitpid(-1, NULL, WNOHANG) > 0);
  96
  97 #endif
  98 }
  99
 100 /*
 101   Check if the other end is active.
 102   If we have sent packets, but didn't receive any,
 103   then possibly the other end is dead. We send a
 104   PING request over the meta connection. If the other
 105   end does not reply in time, we consider them dead
 106   and close the connection.
 107 */
 108 static void timeout_handler(event_loop_t *loop, void *data) {
 109         meshlink_handle_t *mesh = loop->data;
 110         logger(mesh, MESHLINK_DEBUG, "timeout_handler()");
 111
 112         for list_each(connection_t, c, mesh->connections) {
 113                 // Also make sure that if outstanding key requests for the UDP counterpart of a connection has timed out, we restart it.
 114                 if(c->node) {
 115                         if(c->node->status.waitingforkey && c->node->last_req_key + mesh->pingtimeout <= mesh->loop.now.tv_sec) {
 116                                 send_req_key(mesh, c->node);
 117                         }
 118                 }
 119
 120                 if(c->last_ping_time + mesh->pingtimeout <= mesh->loop.now.tv_sec) {
 121                         if(c->status.active) {
 122                                 if(c->status.pinged) {
 123                                         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);
 124                                 } else if(c->last_ping_time + mesh->pinginterval <= mesh->loop.now.tv_sec) {
 125                                         send_ping(mesh, c);
 126                                         continue;
 127                                 } else {
 128                                         continue;
 129                                 }
 130                         } else {
 131                                 if(c->status.connecting) {
 132                                         logger(mesh, MESHLINK_WARNING, "Timeout while connecting to %s", c->name);
 133                                 } else {
 134                                         logger(mesh, MESHLINK_WARNING, "Timeout from %s during authentication", c->name);
 135                                 }
 136                         }
 137
 138                         terminate_connection(mesh, c, c->status.active);
 139                 }
 140         }
 141
 142         timeout_set(&mesh->loop, data, &(struct timeval) {
 143                 mesh->pingtimeout, rand() % 100000
 144         });
 145 }
 146
 147 // devclass asc, last_successfull_connection desc
 148 static int node_compare_devclass_asc_lsc_desc(const void *a, const void *b) {
 149         const node_t *na = a, *nb = b;
 150
 151         if(na->devclass < nb->devclass) {
 152                 return -1;
 153         }
 154
 155         if(na->devclass > nb->devclass) {
 156                 return 1;
 157         }
 158
 159         if(na->last_successfull_connection == nb->last_successfull_connection) {
 160                 return 0;
 161         }
 162
 163         if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
 164                 return -1;
 165         }
 166
 167         if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
 168                 return 1;
 169         }
 170
 171         if(na < nb) {
 172                 return -1;
 173         }
 174
 175         if(na > nb) {
 176                 return 1;
 177         }
 178
 179         return 0;
 180 }
 181
 182 // last_successfull_connection desc
 183 static int node_compare_lsc_desc(const void *a, const void *b) {
 184         const node_t *na = a, *nb = b;
 185
 186         if(na->last_successfull_connection == nb->last_successfull_connection) {
 187                 return 0;
 188         }
 189
 190         if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
 191                 return -1;
 192         }
 193
 194         if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
 195                 return 1;
 196         }
 197
 198         if(na < nb) {
 199                 return -1;
 200         }
 201
 202         if(na > nb) {
 203                 return 1;
 204         }
 205
 206         return 0;
 207 }
 208
 209 // devclass desc
 210 static int node_compare_devclass_desc(const void *a, const void *b) {
 211         const node_t *na = a, *nb = b;
 212
 213         if(na->devclass < nb->devclass) {
 214                 return -1;
 215         }
 216
 217         if(na->devclass > nb->devclass) {
 218                 return 1;
 219         }
 220
 221         if(na < nb) {
 222                 return -1;
 223         }
 224
 225         if(na > nb) {
 226                 return 1;
 227         }
 228
 229         return 0;
 230 }
 231
 232
 233 /*
 234
 235 autoconnect()
 236 {
 237         timeout = 5
 238
 239         // find the best one for initial connect
 240
 241         if cur < min
 242                 newcon =
 243                         first from nodes
 244                                 where dclass <= my.dclass and !connection and (timestamp - last_retry) > retry_timeout
 245                                 order by dclass asc, last_connection desc
 246                 if newcon
 247                         timeout = 0
 248                         goto connect
 249
 250
 251         // 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
 252
 253         if min <= cur < max
 254                 j = 0
 255                 for i = BACKBONE to my.dclass
 256                         j += count(from connections where node.dclass = i)
 257                         if j < min
 258                                 newcon =
 259                                         first from nodes
 260                                                 where dclass = i and !connection and (timestamp - last_retry) > retry_timeout
 261                                                 order by last_connection desc
 262                                 if newcon
 263                                         goto connect
 264                         else
 265                                 break
 266
 267
 268         // heal partitions
 269
 270         if min <= cur < max
 271                 newcon =
 272                         first from nodes
 273                                 where dclass <= my.dclass and !reachable and (timestamp - last_retry) > retry_timeout
 274                                 order by dclass asc, last_connection desc
 275                 if newcon
 276                         goto connect
 277
 278
 279         // connect
 280
 281 connect:
 282         if newcon
 283                 connect newcon
 284
 285
 286         // 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]
 287
 288         if min < cur <= max
 289                 j = 0
 290                 for i = BACKBONE to my.dclass
 291                         j += count(from connections where node.dclass = i)
 292                         if min < j
 293                                 delcon =
 294                                         first from nodes
 295                                                 where dclass >= i and outgoing_connection
 296                                                 order by dclass desc
 297                                 if disconnect
 298                                         goto disconnect
 299                                 else
 300                                         break
 301
 302
 303         // disconnect connections in case we have more than enough connections
 304
 305         if max < cur
 306                 delcon =
 307                         first from nodes
 308                                 where outgoing_connection
 309                                 order by dclass desc
 310                 goto disconnect
 311
 312         // disconnect
 313
 314 disconnect
 315         if delcon
 316                 disconnect delcon
 317
 318
 319         // next iteration
 320         next (timeout, autoconnect)
 321
 322 }
 323
 324 */
 325
 326
 327 static void periodic_handler(event_loop_t *loop, void *data) {
 328         meshlink_handle_t *mesh = loop->data;
 329
 330         /* Check if there are too many contradicting ADD_EDGE and DEL_EDGE messages.
 331            This usually only happens when another node has the same Name as this node.
 332            If so, sleep for a short while to prevent a storm of contradicting messages.
 333         */
 334
 335         if(mesh->contradicting_del_edge > 100 && mesh->contradicting_add_edge > 100) {
 336                 logger(mesh, MESHLINK_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", mesh->sleeptime);
 337                 usleep(mesh->sleeptime * 1000000LL);
 338                 mesh->sleeptime *= 2;
 339
 340                 if(mesh->sleeptime < 0) {
 341                         mesh->sleeptime = 3600;
 342                 }
 343         } else {
 344                 mesh->sleeptime /= 2;
 345
 346                 if(mesh->sleeptime < 10) {
 347                         mesh->sleeptime = 10;
 348                 }
 349         }
 350
 351         mesh->contradicting_add_edge = 0;
 352         mesh->contradicting_del_edge = 0;
 353
 354         int timeout = 5;
 355
 356         /* Check if we need to make or break connections. */
 357
 358         if(mesh->nodes->count > 1) {
 359
 360                 logger(mesh, MESHLINK_DEBUG, "--- autoconnect begin ---");
 361
 362                 int retry_timeout = min(mesh->nodes->count * 5, 60);
 363
 364                 logger(mesh, MESHLINK_DEBUG, "* devclass = %d", mesh->devclass);
 365                 logger(mesh, MESHLINK_DEBUG, "* nodes = %d", mesh->nodes->count);
 366                 logger(mesh, MESHLINK_DEBUG, "* retry_timeout = %d", retry_timeout);
 367
 368
 369                 // connect disconnect nodes
 370
 371                 node_t *connect_to = NULL;
 372                 node_t *disconnect_from = NULL;
 373
 374
 375                 // get cur_connects
 376
 377                 unsigned int cur_connects = 0;
 378
 379                 for list_each(connection_t, c, mesh->connections) {
 380                         if(c->status.active) {
 381                                 cur_connects += 1;
 382                         }
 383                 }
 384
 385                 logger(mesh, MESHLINK_DEBUG, "* cur_connects = %d", cur_connects);
 386                 logger(mesh, MESHLINK_DEBUG, "* outgoings = %d", mesh->outgoings->count);
 387
 388                 // get min_connects and max_connects
 389
 390                 unsigned int min_connects = dev_class_traits[mesh->devclass].min_connects;
 391                 unsigned int max_connects = dev_class_traits[mesh->devclass].max_connects;
 392
 393                 logger(mesh, MESHLINK_DEBUG, "* min_connects = %d", min_connects);
 394                 logger(mesh, MESHLINK_DEBUG, "* max_connects = %d", max_connects);
 395
 396                 // find the best one for initial connect
 397
 398                 if(cur_connects < min_connects) {
 399                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
 400
 401                         for splay_each(node_t, n, mesh->nodes) {
 402                                 logger(mesh, MESHLINK_DEBUG, "* %s->devclass = %d", n->name, n->devclass);
 403
 404                                 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)) {
 405                                         splay_insert(nodes, n);
 406                                 }
 407                         }
 408
 409                         if(nodes->head) {
 410                                 //timeout = 0;
 411                                 connect_to = (node_t *)nodes->head->data;
 412
 413                                 logger(mesh, MESHLINK_DEBUG, "* found best one for initial connect: %s", connect_to->name);
 414                         } else {
 415                                 logger(mesh, MESHLINK_DEBUG, "* could not find node for initial connect");
 416                         }
 417
 418                         splay_free_tree(nodes);
 419                 }
 420
 421
 422                 // find better nodes to connect to
 423
 424                 if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
 425                         unsigned int connects = 0;
 426
 427                         for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
 428                                 for list_each(connection_t, c, mesh->connections) {
 429                                         if(c->status.active && c->node && c->node->devclass == devclass) {
 430                                                 connects += 1;
 431                                         }
 432                                 }
 433
 434                                 if(connects < min_connects) {
 435                                         splay_tree_t *nodes = splay_alloc_tree(node_compare_lsc_desc, NULL);
 436
 437                                         for splay_each(node_t, n, mesh->nodes) {
 438                                                 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)) {
 439                                                         splay_insert(nodes, n);
 440                                                 }
 441                                         }
 442
 443                                         if(nodes->head) {
 444                                                 logger(mesh, MESHLINK_DEBUG, "* found better node");
 445                                                 connect_to = (node_t *)nodes->head->data;
 446
 447                                                 splay_free_tree(nodes);
 448                                                 break;
 449                                         }
 450
 451                                         splay_free_tree(nodes);
 452                                 } else {
 453                                         break;
 454                                 }
 455                         }
 456
 457                         if(!connect_to) {
 458                                 logger(mesh, MESHLINK_DEBUG, "* could not find better nodes");
 459                         }
 460                 }
 461
 462
 463                 // heal partitions
 464
 465                 if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
 466                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
 467
 468                         for splay_each(node_t, n, mesh->nodes) {
 469                                 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)) {
 470                                         splay_insert(nodes, n);
 471                                 }
 472                         }
 473
 474                         if(nodes->head) {
 475                                 logger(mesh, MESHLINK_DEBUG, "* try to heal partition");
 476                                 connect_to = (node_t *)nodes->head->data;
 477                         } else {
 478                                 logger(mesh, MESHLINK_DEBUG, "* could not find nodes for partition healing");
 479                         }
 480
 481                         splay_free_tree(nodes);
 482                 }
 483
 484
 485                 // perform connect
 486
 487                 if(connect_to && !connect_to->connection) {
 488                         connect_to->last_connect_try = mesh->loop.now.tv_sec;
 489                         logger(mesh, MESHLINK_DEBUG, "Autoconnect trying to connect to %s", connect_to->name);
 490
 491                         /* check if there is already a connection attempt to this node */
 492                         bool skip = false;
 493
 494                         for list_each(outgoing_t, outgoing, mesh->outgoings) {
 495                                 if(outgoing->node == connect_to) {
 496                                         logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since it is an outgoing connection already");
 497                                         skip = true;
 498                                         break;
 499                                 }
 500                         }
 501
 502                         if(!connect_to->status.reachable && !node_read_public_key(mesh, connect_to)) {
 503                                 logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since we don't know this node's public key");
 504                                 skip = true;
 505                         }
 506
 507                         if(!skip) {
 508                                 logger(mesh, MESHLINK_DEBUG, "Autoconnecting to %s", connect_to->name);
 509                                 outgoing_t *outgoing = xzalloc(sizeof(outgoing_t));
 510                                 outgoing->node = connect_to;
 511                                 list_insert_tail(mesh->outgoings, outgoing);
 512                                 setup_outgoing_connection(mesh, outgoing);
 513                         }
 514                 }
 515
 516
 517                 // disconnect suboptimal outgoing connections
 518
 519                 if(min_connects < cur_connects /*&& cur_connects <= max_connects*/) {
 520                         unsigned int connects = 0;
 521
 522                         for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
 523                                 for list_each(connection_t, c, mesh->connections) {
 524                                         if(c->status.active && c->node && c->node->devclass == devclass) {
 525                                                 connects += 1;
 526                                         }
 527                                 }
 528
 529                                 if(min_connects < connects) {
 530                                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
 531
 532                                         for list_each(connection_t, c, mesh->connections) {
 533                                                 if(c->outgoing && c->node && c->node->devclass >= devclass) {
 534                                                         splay_insert(nodes, c->node);
 535                                                 }
 536                                         }
 537
 538                                         if(nodes->head) {
 539                                                 logger(mesh, MESHLINK_DEBUG, "* disconnect suboptimal outgoing connection");
 540                                                 disconnect_from = (node_t *)nodes->head->data;
 541                                         }
 542
 543                                         splay_free_tree(nodes);
 544                                         break;
 545                                 }
 546                         }
 547
 548                         if(!disconnect_from) {
 549                                 logger(mesh, MESHLINK_DEBUG, "* no suboptimal outgoing connections");
 550                         }
 551                 }
 552
 553
 554                 // disconnect connections (too many connections)
 555
 556                 if(!disconnect_from && max_connects < cur_connects) {
 557                         splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
 558
 559                         for list_each(connection_t, c, mesh->connections) {
 560                                 if(c->status.active && c->node) {
 561                                         splay_insert(nodes, c->node);
 562                                 }
 563                         }
 564
 565                         if(nodes->head) {
 566                                 logger(mesh, MESHLINK_DEBUG, "* disconnect connection (too many connections)");
 567
 568                                 //timeout = 0;
 569                                 disconnect_from = (node_t *)nodes->head->data;
 570                         } else {
 571                                 logger(mesh, MESHLINK_DEBUG, "* no node we want to disconnect, even though we have too many connections");
 572                         }
 573
 574                         splay_free_tree(nodes);
 575                 }
 576
 577
 578                 // perform disconnect
 579
 580                 if(disconnect_from && disconnect_from->connection) {
 581                         logger(mesh, MESHLINK_DEBUG, "Autodisconnecting from %s", disconnect_from->connection->name);
 582                         list_delete(mesh->outgoings, disconnect_from->connection->outgoing);
 583                         disconnect_from->connection->outgoing = NULL;
 584                         terminate_connection(mesh, disconnect_from->connection, disconnect_from->connection->status.active);
 585                 }
 586
 587                 // reduce timeout if we don't have enough connections + outgoings
 588                 if(cur_connects + mesh->outgoings->count < 3) {
 589                         timeout = 1;
 590                 }
 591
 592                 // done!
 593
 594                 logger(mesh, MESHLINK_DEBUG, "--- autoconnect end ---");
 595         }
 596
 597         for splay_each(node_t, n, mesh->nodes) {
 598                 if(n->status.dirty) {
 599                         node_write_config(mesh, n);
 600                         n->status.dirty = false;
 601                 }
 602         }
 603
 604         timeout_set(&mesh->loop, data, &(struct timeval) {
 605                 timeout, rand() % 100000
 606         });
 607 }
 608
 609 void handle_meta_connection_data(meshlink_handle_t *mesh, connection_t *c) {
 610         if(!receive_meta(mesh, c)) {
 611                 terminate_connection(mesh, c, c->status.active);
 612                 return;
 613         }
 614 }
 615
 616 void retry(meshlink_handle_t *mesh) {
 617         /* Reset the reconnection timers for all outgoing connections */
 618         for list_each(outgoing_t, outgoing, mesh->outgoings) {
 619                 outgoing->timeout = 0;
 620
 621                 if(outgoing->ev.cb)
 622                         timeout_set(&mesh->loop, &outgoing->ev, &(struct timeval) {
 623                         0, 0
 624                 });
 625         }
 626
 627 #ifdef HAVE_IFADDRS_H
 628         struct ifaddrs *ifa = NULL;
 629         getifaddrs(&ifa);
 630 #endif
 631
 632         /* For active connections, check if their addresses are still valid.
 633          * If yes, reset their ping timers, otherwise terminate them. */
 634         for list_each(connection_t, c, mesh->connections) {
 635                 if(!c->status.active) {
 636                         continue;
 637                 }
 638
 639                 if(!c->status.pinged) {
 640                         c->last_ping_time = 0;
 641                 }
 642
 643 #ifdef HAVE_IFADDRS_H
 644
 645                 if(!ifa) {
 646                         continue;
 647                 }
 648
 649                 sockaddr_t sa;
 650                 socklen_t salen = sizeof(sa);
 651
 652                 if(getsockname(c->socket, &sa.sa, &salen)) {
 653                         continue;
 654                 }
 655
 656                 bool found = false;
 657
 658                 for(struct ifaddrs *ifap = ifa; ifap; ifap = ifap->ifa_next) {
 659                         if(ifap->ifa_addr && !sockaddrcmp_noport(&sa, (sockaddr_t *)ifap->ifa_addr)) {
 660                                 found = true;
 661                                 break;
 662                         }
 663
 664                 }
 665
 666                 if(!found) {
 667                         logger(mesh, MESHLINK_DEBUG, "Local address for connection to %s no longer valid, terminating", c->name);
 668                         terminate_connection(mesh, c, c->status.active);
 669                 }
 670
 671 #endif
 672         }
 673
 674 #ifdef HAVE_IFADDRS_H
 675
 676         if(ifa) {
 677                 freeifaddrs(ifa);
 678         }
 679
 680 #endif
 681
 682         /* Kick the ping timeout handler */
 683         timeout_set(&mesh->loop, &mesh->pingtimer, &(struct timeval) {
 684                 0, 0
 685         });
 686 }
 687
 688 /*
 689   this is where it all happens...
 690 */
 691 int main_loop(meshlink_handle_t *mesh) {
 692         timeout_add(&mesh->loop, &mesh->pingtimer, timeout_handler, &mesh->pingtimer, &(struct timeval) {
 693                 mesh->pingtimeout, rand() % 100000
 694         });
 695         timeout_add(&mesh->loop, &mesh->periodictimer, periodic_handler, &mesh->periodictimer, &(struct timeval) {
 696                 0, 0
 697         });
 698
 699         //Add signal handler
 700         mesh->datafromapp.signum = 0;
 701         signal_add(&(mesh->loop), &(mesh->datafromapp), (signal_cb_t)meshlink_send_from_queue, mesh, mesh->datafromapp.signum);
 702
 703         if(!event_loop_run(&(mesh->loop), &(mesh->mesh_mutex))) {
 704                 logger(mesh, MESHLINK_ERROR, "Error while waiting for input: %s", strerror(errno));
 705                 return 1;
 706         }
 707
 708         timeout_del(&mesh->loop, &mesh->periodictimer);
 709         timeout_del(&mesh->loop, &mesh->pingtimer);
 710
 711         return 0;
 712 }