/*
net.c -- most of the network code
- Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
- 2006 Scott Lamb <slamb@slamb.org>
- 2011 Loïc Grenié <loic.grenie@gmail.com>
+ Copyright (C) 2014-2017 Guus Sliepen <guus@meshlink.io>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
#include "utils.h"
#include "conf.h"
#include "connection.h"
-#include "device.h"
#include "graph.h"
#include "logger.h"
+#include "meshlink_internal.h"
#include "meta.h"
#include "net.h"
#include "netutl.h"
-#include "process.h"
#include "protocol.h"
-#include "subnet.h"
#include "xalloc.h"
-int contradicting_add_edge = 0;
-int contradicting_del_edge = 0;
-static int sleeptime = 10;
-time_t last_config_check = 0;
+#include <assert.h>
-/* Purge edges and subnets of unreachable nodes. Use carefully. */
-
-void purge(void) {
- logger(DEBUG_PROTOCOL, LOG_DEBUG, "Purging unreachable nodes");
-
- /* Remove all edges and subnets owned by unreachable nodes. */
-
- for splay_each(node_t, n, node_tree) {
- if(!n->status.reachable) {
- logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Purging node %s (%s)", n->name, n->hostname);
-
- for splay_each(subnet_t, s, n->subnet_tree) {
- send_del_subnet(everyone, s);
- if(!strictsubnets)
- subnet_del(n, s);
- }
-
- for splay_each(edge_t, e, n->edge_tree) {
- if(!tunnelserver)
- send_del_edge(everyone, e);
- edge_del(e);
- }
- }
- }
-
- /* Check if anyone else claims to have an edge to an unreachable node. If not, delete node. */
-
- for splay_each(node_t, n, node_tree) {
- if(!n->status.reachable) {
- for splay_each(edge_t, e, edge_weight_tree)
- if(e->to == n)
- return;
-
- if(!strictsubnets || !n->subnet_tree->head)
- /* in strictsubnets mode do not delete nodes with subnets */
- node_del(n);
- }
- }
+#if !defined(min)
+static inline int min(int a, int b) {
+ return a < b ? a : b;
}
+#endif
+
+static const int default_timeout = 5;
+static const int default_interval = 60;
/*
Terminate a connection:
- Kill it with fire
- Check if we need to retry making an outgoing connection
*/
-void terminate_connection(connection_t *c, bool report) {
- logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Closing connection with %s (%s)", c->name, c->hostname);
+void terminate_connection(meshlink_handle_t *mesh, connection_t *c, bool report) {
+ logger(mesh, MESHLINK_INFO, "Closing connection with %s", c->name);
c->status.active = false;
- if(c->node && c->node->connection == c)
+ if(c->node && c->node->connection == c) {
c->node->connection = NULL;
+ }
if(c->edge) {
- if(report && !tunnelserver)
- send_del_edge(everyone, c->edge);
+ if(report) {
+ send_del_edge(mesh, mesh->everyone, c->edge, 0);
+ }
- edge_del(c->edge);
+ edge_del(mesh, c->edge);
c->edge = NULL;
/* Run MST and SSSP algorithms */
- graph();
+ graph(mesh);
/* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
- if(report && !c->node->status.reachable) {
+ if(report && c->node && !c->node->status.reachable) {
edge_t *e;
- e = lookup_edge(c->node, myself);
+ e = lookup_edge(c->node, mesh->self);
+
if(e) {
- if(!tunnelserver)
- send_del_edge(everyone, e);
- edge_del(e);
+ send_del_edge(mesh, mesh->everyone, e, 0);
+ edge_del(mesh, e);
}
}
}
outgoing_t *outgoing = c->outgoing;
- connection_del(c);
+ connection_del(mesh, c);
/* Check if this was our outgoing connection */
- if(outgoing)
- do_outgoing_connection(outgoing);
+ if(outgoing) {
+ do_outgoing_connection(mesh, outgoing);
+ }
+
+#ifndef HAVE_MINGW
+ /* Clean up dead proxy processes */
+
+ while(waitpid(-1, NULL, WNOHANG) > 0);
+
+#endif
}
/*
end does not reply in time, we consider them dead
and close the connection.
*/
-static void timeout_handler(int fd, short events, void *event) {
- time_t now = time(NULL);
-
- for list_each(connection_t, c, connection_list) {
- if(c->status.control)
- continue;
+static void timeout_handler(event_loop_t *loop, void *data) {
+ meshlink_handle_t *mesh = loop->data;
+ logger(mesh, MESHLINK_DEBUG, "timeout_handler()");
+
+ for list_each(connection_t, c, mesh->connections) {
+ int pingtimeout = c->node ? mesh->dev_class_traits[c->node->devclass].pingtimeout : default_timeout;
+ int pinginterval = c->node ? mesh->dev_class_traits[c->node->devclass].pinginterval : default_interval;
+
+ // Also make sure that if outstanding key requests for the UDP counterpart of a connection has timed out, we restart it.
+ if(c->node) {
+ if(c->node->status.waitingforkey && c->node->last_req_key + pingtimeout <= mesh->loop.now.tv_sec) {
+ send_req_key(mesh, c->node);
+ }
+ }
- if(c->last_ping_time + pingtimeout <= now) {
+ if(c->last_ping_time + pingtimeout <= mesh->loop.now.tv_sec) {
if(c->status.active) {
if(c->status.pinged) {
- logger(DEBUG_CONNECTIONS, LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds", c->name, c->hostname, (long)now - c->last_ping_time);
- } else if(c->last_ping_time + pinginterval <= now) {
- send_ping(c);
+ 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);
+ } else if(c->last_ping_time + pinginterval <= mesh->loop.now.tv_sec) {
+ send_ping(mesh, c);
continue;
} else {
continue;
}
} else {
- if(c->status.connecting)
- logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout while connecting to %s (%s)", c->name, c->hostname);
- else
- logger(DEBUG_CONNECTIONS, LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname);
+ if(c->status.connecting) {
+ logger(mesh, MESHLINK_WARNING, "Timeout while connecting to %s", c->name);
+ } else {
+ logger(mesh, MESHLINK_WARNING, "Timeout from %s during authentication", c->name);
+ }
}
- terminate_connection(c, c->status.active);
+
+ terminate_connection(mesh, c, c->status.active);
}
}
- if(contradicting_del_edge > 100 && contradicting_add_edge > 100) {
- logger(DEBUG_ALWAYS, LOG_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", sleeptime);
- usleep(sleeptime * 1000000LL);
- sleeptime *= 2;
- if(sleeptime < 0)
- sleeptime = 3600;
- } else {
- sleeptime /= 2;
- if(sleeptime < 10)
- sleeptime = 10;
+ timeout_set(&mesh->loop, data, &(struct timeval) {
+ default_timeout, rand() % 100000
+ });
+}
+
+// devclass asc, last_successfull_connection desc
+static int node_compare_devclass_asc_lsc_desc(const void *a, const void *b) {
+ const node_t *na = a, *nb = b;
+
+ if(na->devclass < nb->devclass) {
+ return -1;
}
- contradicting_add_edge = 0;
- contradicting_del_edge = 0;
+ if(na->devclass > nb->devclass) {
+ return 1;
+ }
+
+ if(na->last_successfull_connection == nb->last_successfull_connection) {
+ return 0;
+ }
- event_add(event, &(struct timeval){pingtimeout, 0});
+ if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
+ return -1;
+ }
+
+ if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
+ return 1;
+ }
+
+ if(na < nb) {
+ return -1;
+ }
+
+ if(na > nb) {
+ return 1;
+ }
+
+ return 0;
}
-void handle_meta_connection_data(int fd, short events, void *data) {
- connection_t *c = data;
- int result;
- socklen_t len = sizeof result;
+// last_successfull_connection desc
+static int node_compare_lsc_desc(const void *a, const void *b) {
+ const node_t *na = a, *nb = b;
- if(c->status.connecting) {
- c->status.connecting = false;
+ if(na->last_successfull_connection == nb->last_successfull_connection) {
+ return 0;
+ }
- getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len);
+ if(na->last_successfull_connection == 0 || na->last_successfull_connection > nb->last_successfull_connection) {
+ return -1;
+ }
- if(!result)
- finish_connecting(c);
- else {
- logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Error while connecting to %s (%s): %s", c->name, c->hostname, sockstrerror(result));
- terminate_connection(c, false);
- return;
- }
+ if(nb->last_successfull_connection == 0 || na->last_successfull_connection < nb->last_successfull_connection) {
+ return 1;
}
- if (!receive_meta(c)) {
- terminate_connection(c, c->status.active);
- return;
+ if(na < nb) {
+ return -1;
}
-}
-static void sigterm_handler(int signal, short events, void *data) {
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
- event_loopexit(NULL);
+ if(na > nb) {
+ return 1;
+ }
+
+ return 0;
}
-static void sighup_handler(int signal, short events, void *data) {
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
- reopenlogger();
- reload_configuration();
+// devclass desc
+static int node_compare_devclass_desc(const void *a, const void *b) {
+ const node_t *na = a, *nb = b;
+
+ if(na->devclass < nb->devclass) {
+ return -1;
+ }
+
+ if(na->devclass > nb->devclass) {
+ return 1;
+ }
+
+ if(na < nb) {
+ return -1;
+ }
+
+ if(na > nb) {
+ return 1;
+ }
+
+ return 0;
}
-static void sigalrm_handler(int signal, short events, void *data) {
- logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
- retry();
+
+/*
+
+autoconnect()
+{
+ timeout = 5
+
+ // find the best one for initial connect
+
+ if cur < min
+ newcon =
+ first from nodes
+ where dclass <= my.dclass and !connection and (timestamp - last_retry) > retry_timeout
+ order by dclass asc, last_connection desc
+ if newcon
+ timeout = 0
+ goto connect
+
+
+ // 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
+
+ if min <= cur < max
+ j = 0
+ for i = BACKBONE to my.dclass
+ j += count(from connections where node.dclass = i)
+ if j < min
+ newcon =
+ first from nodes
+ where dclass = i and !connection and (timestamp - last_retry) > retry_timeout
+ order by last_connection desc
+ if newcon
+ goto connect
+ else
+ break
+
+
+ // heal partitions
+
+ if min <= cur < max
+ newcon =
+ first from nodes
+ where dclass <= my.dclass and !reachable and (timestamp - last_retry) > retry_timeout
+ order by dclass asc, last_connection desc
+ if newcon
+ goto connect
+
+
+ // connect
+
+connect:
+ if newcon
+ connect newcon
+
+
+ // 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]
+
+ if min < cur <= max
+ j = 0
+ for i = BACKBONE to my.dclass
+ j += count(from connections where node.dclass = i)
+ if min < j
+ delcon =
+ first from nodes
+ where dclass >= i and outgoing_connection
+ order by dclass desc
+ if disconnect
+ goto disconnect
+ else
+ break
+
+
+ // disconnect connections in case we have more than enough connections
+
+ if max < cur
+ delcon =
+ first from nodes
+ where outgoing_connection
+ order by dclass desc
+ goto disconnect
+
+ // disconnect
+
+disconnect
+ if delcon
+ disconnect delcon
+
+
+ // next iteration
+ next (timeout, autoconnect)
+
}
-int reload_configuration(void) {
- char *fname;
+*/
+
+
+static void periodic_handler(event_loop_t *loop, void *data) {
+ meshlink_handle_t *mesh = loop->data;
- /* Reread our own configuration file */
+ /* Check if there are too many contradicting ADD_EDGE and DEL_EDGE messages.
+ This usually only happens when another node has the same Name as this node.
+ If so, sleep for a short while to prevent a storm of contradicting messages.
+ */
- exit_configuration(&config_tree);
- init_configuration(&config_tree);
+ if(mesh->contradicting_del_edge > 100 && mesh->contradicting_add_edge > 100) {
+ logger(mesh, MESHLINK_WARNING, "Possible node with same Name as us! Sleeping %d seconds.", mesh->sleeptime);
+ usleep(mesh->sleeptime * 1000000LL);
+ mesh->sleeptime *= 2;
- if(!read_server_config()) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reread configuration file, exitting.");
- event_loopexit(NULL);
- return EINVAL;
+ if(mesh->sleeptime < 0) {
+ mesh->sleeptime = 3600;
+ }
+ } else {
+ mesh->sleeptime /= 2;
+
+ if(mesh->sleeptime < 10) {
+ mesh->sleeptime = 10;
+ }
}
- read_config_options(config_tree, NULL);
+ mesh->contradicting_add_edge = 0;
+ mesh->contradicting_del_edge = 0;
+
+ int timeout = default_timeout;
+
+ /* Check if we need to make or break connections. */
+
+ if(mesh->nodes->count > 1) {
+
+ logger(mesh, MESHLINK_DEBUG, "--- autoconnect begin ---");
+
+ int retry_timeout = min(mesh->nodes->count * default_timeout, 60);
+
+ logger(mesh, MESHLINK_DEBUG, "* devclass = %d", mesh->devclass);
+ logger(mesh, MESHLINK_DEBUG, "* nodes = %d", mesh->nodes->count);
+ logger(mesh, MESHLINK_DEBUG, "* retry_timeout = %d", retry_timeout);
+
+
+ // connect disconnect nodes
+
+ node_t *connect_to = NULL;
+ node_t *disconnect_from = NULL;
+
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, myself->name);
- read_config_file(config_tree, fname);
- free(fname);
+ // get cur_connects
- /* Parse some options that are allowed to be changed while tinc is running */
+ unsigned int cur_connects = 0;
- setup_myself_reloadable();
+ for list_each(connection_t, c, mesh->connections) {
+ if(c->status.active) {
+ cur_connects += 1;
+ }
+ }
+
+ logger(mesh, MESHLINK_DEBUG, "* cur_connects = %d", cur_connects);
+ logger(mesh, MESHLINK_DEBUG, "* outgoings = %d", mesh->outgoings->count);
- /* If StrictSubnet is set, expire deleted Subnets and read new ones in */
+ // get min_connects and max_connects
- if(strictsubnets) {
- for splay_each(subnet_t, subnet, subnet_tree)
- subnet->expires = 1;
+ unsigned int min_connects = mesh->dev_class_traits[mesh->devclass].min_connects;
+ unsigned int max_connects = mesh->dev_class_traits[mesh->devclass].max_connects;
- load_all_subnets();
+ logger(mesh, MESHLINK_DEBUG, "* min_connects = %d", min_connects);
+ logger(mesh, MESHLINK_DEBUG, "* max_connects = %d", max_connects);
- for splay_each(subnet_t, subnet, subnet_tree) {
- if(subnet->expires == 1) {
- send_del_subnet(everyone, subnet);
- if(subnet->owner->status.reachable)
- subnet_update(subnet->owner, subnet, false);
- subnet_del(subnet->owner, subnet);
- } else if(subnet->expires == -1) {
- subnet->expires = 0;
+ // find the best one for initial connect
+
+ if(cur_connects < min_connects) {
+ splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
+
+ for splay_each(node_t, n, mesh->nodes) {
+ logger(mesh, MESHLINK_DEBUG, "* %s->devclass = %d", n->name, n->devclass);
+
+ 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)) {
+ splay_insert(nodes, n);
+ }
+ }
+
+ if(nodes->head) {
+ //timeout = 0;
+ connect_to = (node_t *)nodes->head->data;
+
+ logger(mesh, MESHLINK_DEBUG, "* found best one for initial connect: %s", connect_to->name);
} else {
- send_add_subnet(everyone, subnet);
- if(subnet->owner->status.reachable)
- subnet_update(subnet->owner, subnet, true);
+ logger(mesh, MESHLINK_DEBUG, "* could not find node for initial connect");
}
+
+ splay_free_tree(nodes);
}
- } else { /* Only read our own subnets back in */
- for splay_each(subnet_t, subnet, myself->subnet_tree)
- if(!subnet->expires)
- subnet->expires = 1;
- config_t *cfg = lookup_config(config_tree, "Subnet");
- while(cfg) {
- subnet_t *subnet, *s2;
+ // find better nodes to connect to
+
+ if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
+ unsigned int connects = 0;
+
+ for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
+ for list_each(connection_t, c, mesh->connections) {
+ if(c->status.active && c->node && c->node->devclass == devclass) {
+ connects += 1;
+ }
+ }
- if(!get_config_subnet(cfg, &subnet))
- continue;
+ if(connects < min_connects) {
+ splay_tree_t *nodes = splay_alloc_tree(node_compare_lsc_desc, NULL);
- if((s2 = lookup_subnet(myself, subnet))) {
- if(s2->expires == 1)
- s2->expires = 0;
+ for splay_each(node_t, n, mesh->nodes) {
+ 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)) {
+ splay_insert(nodes, n);
+ }
+ }
+
+ if(nodes->head) {
+ logger(mesh, MESHLINK_DEBUG, "* found better node");
+ connect_to = (node_t *)nodes->head->data;
+
+ splay_free_tree(nodes);
+ break;
+ }
+
+ splay_free_tree(nodes);
+ } else {
+ break;
+ }
+ }
+
+ if(!connect_to) {
+ logger(mesh, MESHLINK_DEBUG, "* could not find better nodes");
+ }
+ }
+
+
+ // heal partitions
+
+ if(!connect_to && min_connects <= cur_connects && cur_connects < max_connects) {
+ splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_asc_lsc_desc, NULL);
+
+ for splay_each(node_t, n, mesh->nodes) {
+ 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)) {
+ splay_insert(nodes, n);
+ }
+ }
- free_subnet(subnet);
+ if(nodes->head) {
+ logger(mesh, MESHLINK_DEBUG, "* try to heal partition");
+ connect_to = (node_t *)nodes->head->data;
} else {
- subnet_add(myself, subnet);
- send_add_subnet(everyone, subnet);
- subnet_update(myself, subnet, true);
+ logger(mesh, MESHLINK_DEBUG, "* could not find nodes for partition healing");
}
- cfg = lookup_config_next(config_tree, cfg);
+ splay_free_tree(nodes);
}
- for splay_each(subnet_t, subnet, myself->subnet_tree) {
- if(subnet->expires == 1) {
- send_del_subnet(everyone, subnet);
- subnet_update(myself, subnet, false);
- subnet_del(myself, subnet);
+
+ // perform connect
+
+ if(connect_to && !connect_to->connection) {
+ connect_to->last_connect_try = mesh->loop.now.tv_sec;
+ logger(mesh, MESHLINK_DEBUG, "Autoconnect trying to connect to %s", connect_to->name);
+
+ /* check if there is already a connection attempt to this node */
+ bool skip = false;
+
+ for list_each(outgoing_t, outgoing, mesh->outgoings) {
+ if(outgoing->node == connect_to) {
+ logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since it is an outgoing connection already");
+ skip = true;
+ break;
+ }
+ }
+
+ if(!connect_to->status.reachable && !node_read_public_key(mesh, connect_to)) {
+ logger(mesh, MESHLINK_DEBUG, "* skip autoconnect since we don't know this node's public key");
+ skip = true;
+ }
+
+ if(!skip) {
+ logger(mesh, MESHLINK_DEBUG, "Autoconnecting to %s", connect_to->name);
+ outgoing_t *outgoing = xzalloc(sizeof(outgoing_t));
+ outgoing->node = connect_to;
+ list_insert_tail(mesh->outgoings, outgoing);
+ setup_outgoing_connection(mesh, outgoing);
}
}
- }
- /* Try to make outgoing connections */
-
- try_outgoing_connections();
- /* Close connections to hosts that have a changed or deleted host config file */
+ // disconnect suboptimal outgoing connections
- for list_each(connection_t, c, connection_list) {
- if(c->status.control)
- continue;
+ if(min_connects < cur_connects /*&& cur_connects <= max_connects*/) {
+ unsigned int connects = 0;
+
+ for(dev_class_t devclass = 0; devclass <= mesh->devclass; ++devclass) {
+ for list_each(connection_t, c, mesh->connections) {
+ if(c->status.active && c->node && c->node->devclass == devclass) {
+ connects += 1;
+ }
+ }
+
+ if(min_connects < connects) {
+ splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
- xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
- struct stat s;
- if(stat(fname, &s) || s.st_mtime > last_config_check) {
- logger(DEBUG_CONNECTIONS, LOG_INFO, "Host config file of %s has been changed", c->name);
- terminate_connection(c, c->status.active);
+ for list_each(connection_t, c, mesh->connections) {
+ if(c->outgoing && c->node && c->node->devclass >= devclass) {
+ splay_insert(nodes, c->node);
+ }
+ }
+
+ if(nodes->head) {
+ logger(mesh, MESHLINK_DEBUG, "* disconnect suboptimal outgoing connection");
+ disconnect_from = (node_t *)nodes->head->data;
+ }
+
+ splay_free_tree(nodes);
+ break;
+ }
+ }
+
+ if(!disconnect_from) {
+ logger(mesh, MESHLINK_DEBUG, "* no suboptimal outgoing connections");
+ }
}
- free(fname);
+
+
+ // disconnect connections (too many connections)
+
+ if(!disconnect_from && max_connects < cur_connects) {
+ splay_tree_t *nodes = splay_alloc_tree(node_compare_devclass_desc, NULL);
+
+ for list_each(connection_t, c, mesh->connections) {
+ if(c->status.active && c->node) {
+ splay_insert(nodes, c->node);
+ }
+ }
+
+ if(nodes->head) {
+ logger(mesh, MESHLINK_DEBUG, "* disconnect connection (too many connections)");
+
+ //timeout = 0;
+ disconnect_from = (node_t *)nodes->head->data;
+ } else {
+ logger(mesh, MESHLINK_DEBUG, "* no node we want to disconnect, even though we have too many connections");
+ }
+
+ splay_free_tree(nodes);
+ }
+
+
+ // perform disconnect
+
+ if(disconnect_from && disconnect_from->connection) {
+ logger(mesh, MESHLINK_DEBUG, "Autodisconnecting from %s", disconnect_from->connection->name);
+ list_delete(mesh->outgoings, disconnect_from->connection->outgoing);
+ disconnect_from->connection->outgoing = NULL;
+ terminate_connection(mesh, disconnect_from->connection, disconnect_from->connection->status.active);
+ }
+
+ // reduce timeout if we don't have enough connections + outgoings
+ if(cur_connects + mesh->outgoings->count < 3) {
+ timeout = 1;
+ }
+
+ // done!
+
+ logger(mesh, MESHLINK_DEBUG, "--- autoconnect end ---");
}
- last_config_check = time(NULL);
+ for splay_each(node_t, n, mesh->nodes) {
+ if(n->status.dirty) {
+ node_write_config(mesh, n);
+ n->status.dirty = false;
+ }
+ }
- return 0;
+ timeout_set(&mesh->loop, data, &(struct timeval) {
+ timeout, rand() % 100000
+ });
}
-void retry(void) {
- for list_each(connection_t, c, connection_list) {
- if(c->outgoing && !c->node) {
- if(timeout_initialized(&c->outgoing->ev))
- event_del(&c->outgoing->ev);
- if(c->status.connecting)
- close(c->socket);
- c->outgoing->timeout = 0;
- terminate_connection(c, c->status.active);
- }
+void handle_meta_connection_data(meshlink_handle_t *mesh, connection_t *c) {
+ if(!receive_meta(mesh, c)) {
+ terminate_connection(mesh, c, c->status.active);
+ return;
}
}
-/*
- this is where it all happens...
-*/
-int main_loop(void) {
- struct event timeout_event;
+void retry(meshlink_handle_t *mesh) {
+ /* Reset the reconnection timers for all outgoing connections */
+ for list_each(outgoing_t, outgoing, mesh->outgoings) {
+ outgoing->timeout = 0;
- timeout_set(&timeout_event, timeout_handler, &timeout_event);
- event_add(&timeout_event, &(struct timeval){pingtimeout, 0});
+ if(outgoing->ev.cb)
+ timeout_set(&mesh->loop, &outgoing->ev, &(struct timeval) {
+ 0, 0
+ });
+ }
-#ifndef HAVE_MINGW
- struct event sighup_event;
- struct event sigterm_event;
- struct event sigquit_event;
- struct event sigalrm_event;
-
- signal_set(&sighup_event, SIGHUP, sighup_handler, NULL);
- signal_add(&sighup_event, NULL);
- signal_set(&sigterm_event, SIGTERM, sigterm_handler, NULL);
- signal_add(&sigterm_event, NULL);
- signal_set(&sigquit_event, SIGQUIT, sigterm_handler, NULL);
- signal_add(&sigquit_event, NULL);
- signal_set(&sigalrm_event, SIGALRM, sigalrm_handler, NULL);
- signal_add(&sigalrm_event, NULL);
+#ifdef HAVE_IFADDRS_H
+ struct ifaddrs *ifa = NULL;
+ getifaddrs(&ifa);
#endif
- if(event_loop(0) < 0) {
- logger(DEBUG_ALWAYS, LOG_ERR, "Error while waiting for input: %s", strerror(errno));
- return 1;
+ /* For active connections, check if their addresses are still valid.
+ * If yes, reset their ping timers, otherwise terminate them. */
+ for list_each(connection_t, c, mesh->connections) {
+ if(!c->status.active) {
+ continue;
+ }
+
+ if(!c->status.pinged) {
+ c->last_ping_time = 0;
+ }
+
+#ifdef HAVE_IFADDRS_H
+
+ if(!ifa) {
+ continue;
+ }
+
+ sockaddr_t sa;
+ socklen_t salen = sizeof(sa);
+
+ if(getsockname(c->socket, &sa.sa, &salen)) {
+ continue;
+ }
+
+ bool found = false;
+
+ for(struct ifaddrs *ifap = ifa; ifap; ifap = ifap->ifa_next) {
+ if(ifap->ifa_addr && !sockaddrcmp_noport(&sa, (sockaddr_t *)ifap->ifa_addr)) {
+ found = true;
+ break;
+ }
+
+ }
+
+ if(!found) {
+ logger(mesh, MESHLINK_DEBUG, "Local address for connection to %s no longer valid, terminating", c->name);
+ terminate_connection(mesh, c, c->status.active);
+ }
+
+#endif
+ }
+
+#ifdef HAVE_IFADDRS_H
+
+ if(ifa) {
+ freeifaddrs(ifa);
}
-#ifndef HAVE_MINGW
- signal_del(&sighup_event);
- signal_del(&sigterm_event);
- signal_del(&sigquit_event);
- signal_del(&sigalrm_event);
#endif
- event_del(&timeout_event);
+ /* Kick the ping timeout handler */
+ timeout_set(&mesh->loop, &mesh->pingtimer, &(struct timeval) {
+ 0, 0
+ });
+}
+
+/*
+ this is where it all happens...
+*/
+int main_loop(meshlink_handle_t *mesh) {
+ timeout_add(&mesh->loop, &mesh->pingtimer, timeout_handler, &mesh->pingtimer, &(struct timeval) {
+ default_timeout, rand() % 100000
+ });
+ timeout_add(&mesh->loop, &mesh->periodictimer, periodic_handler, &mesh->periodictimer, &(struct timeval) {
+ 0, 0
+ });
+
+ //Add signal handler
+ mesh->datafromapp.signum = 0;
+ signal_add(&mesh->loop, &mesh->datafromapp, meshlink_send_from_queue, mesh, mesh->datafromapp.signum);
+
+ if(!event_loop_run(&mesh->loop, &mesh->mesh_mutex)) {
+ logger(mesh, MESHLINK_ERROR, "Error while waiting for input: %s", strerror(errno));
+ abort();
+ signal_del(&mesh->loop, &mesh->datafromapp);
+ timeout_del(&mesh->loop, &mesh->periodictimer);
+ timeout_del(&mesh->loop, &mesh->pingtimer);
+
+ return 1;
+ }
+
+ signal_del(&mesh->loop, &mesh->datafromapp);
+ timeout_del(&mesh->loop, &mesh->periodictimer);
+ timeout_del(&mesh->loop, &mesh->pingtimer);
return 0;
}
projects / meshlink / blobdiff