/*
net.c -- most of the network code
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2021 Guus Sliepen <guus@tinc-vpn.org>
2006 Scott Lamb <slamb@slamb.org>
- 2011 Loïc Grenié <loic.grenie@gmail.com>
+ 2011 Loïc Grenié <loic.grenie@gmail.com>
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 "system.h"
-#include <openssl/rand.h>
-
-#include "utils.h"
-#include "avl_tree.h"
+#include "autoconnect.h"
#include "conf.h"
#include "connection.h"
#include "device.h"
-#include "event.h"
#include "graph.h"
#include "logger.h"
#include "meta.h"
+#include "names.h"
#include "net.h"
#include "netutl.h"
-#include "process.h"
#include "protocol.h"
-#include "route.h"
#include "subnet.h"
+#include "utils.h"
#include "xalloc.h"
-bool do_purge = false;
-volatile bool running = false;
-#ifdef HAVE_PSELECT
-bool graph_dump = false;
-#endif
-
-time_t now = 0;
int contradicting_add_edge = 0;
int contradicting_del_edge = 0;
static int sleeptime = 10;
+time_t last_config_check = 0;
+static timeout_t pingtimer;
+static timeout_t periodictimer;
+static struct timeval last_periodic_run_time;
/* Purge edges and subnets of unreachable nodes. Use carefully. */
-static void purge(void) {
- avl_node_t *nnode, *nnext, *enode, *enext, *snode, *snext;
- node_t *n;
- edge_t *e;
- subnet_t *s;
-
- ifdebug(PROTOCOL) logger(LOG_DEBUG, "Purging unreachable nodes");
+void purge(void) {
+ logger(DEBUG_PROTOCOL, LOG_DEBUG, "Purging unreachable nodes");
/* Remove all edges and subnets owned by unreachable nodes. */
- for(nnode = node_tree->head; nnode; nnode = nnext) {
- nnext = nnode->next;
- n = nnode->data;
-
+ for splay_each(node_t, n, node_tree) {
if(!n->status.reachable) {
- ifdebug(SCARY_THINGS) logger(LOG_DEBUG, "Purging node %s (%s)", n->name,
- n->hostname);
+ logger(DEBUG_SCARY_THINGS, LOG_DEBUG, "Purging node %s (%s)", n->name, n->hostname);
- for(snode = n->subnet_tree->head; snode; snode = snext) {
- snext = snode->next;
- s = snode->data;
+ for splay_each(subnet_t, s, n->subnet_tree) {
send_del_subnet(everyone, s);
- if(!strictsubnets)
+
+ if(!strictsubnets) {
subnet_del(n, s);
+ }
}
- for(enode = n->edge_tree->head; enode; enode = enext) {
- enext = enode->next;
- e = enode->data;
- if(!tunnelserver)
+ 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(nnode = node_tree->head; nnode; nnode = nnext) {
- nnext = nnode->next;
- n = nnode->data;
-
+ for splay_each(node_t, n, node_tree) {
if(!n->status.reachable) {
- for(enode = edge_weight_tree->head; enode; enode = enext) {
- enext = enode->next;
- e = enode->data;
-
- if(e->to == n)
- break;
- }
+ for splay_each(edge_t, e, edge_weight_tree)
+ if(e->to == n) {
+ return;
+ }
- if(!enode && (!strictsubnets || !n->subnet_tree->head))
+ if(!autoconnect && (!strictsubnets || !n->subnet_tree->head))
/* in strictsubnets mode do not delete nodes with subnets */
+ {
node_del(n);
+ }
}
}
}
-/*
- put all file descriptors in an fd_set array
- While we're at it, purge stuff that needs to be removed.
-*/
-static int build_fdset(fd_set *readset, fd_set *writeset) {
- avl_node_t *node, *next;
- connection_t *c;
- int i, max = 0;
-
- FD_ZERO(readset);
- FD_ZERO(writeset);
-
- for(node = connection_tree->head; node; node = next) {
- next = node->next;
- c = node->data;
-
- if(c->status.remove) {
- connection_del(c);
- if(!connection_tree->head)
- purge();
- } else {
- FD_SET(c->socket, readset);
- if(c->outbuflen > 0)
- FD_SET(c->socket, writeset);
- if(c->socket > max)
- max = c->socket;
- }
- }
+/* Put a misbehaving connection in the tarpit */
+void tarpit(int fd) {
+ static int pits[10] = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
+ static unsigned int next_pit = 0;
- for(i = 0; i < listen_sockets; i++) {
- FD_SET(listen_socket[i].tcp, readset);
- if(listen_socket[i].tcp > max)
- max = listen_socket[i].tcp;
- FD_SET(listen_socket[i].udp, readset);
- if(listen_socket[i].udp > max)
- max = listen_socket[i].udp;
+ if(pits[next_pit] != -1) {
+ closesocket(pits[next_pit]);
}
- if(device_fd >= 0)
- FD_SET(device_fd, readset);
- if(device_fd > max)
- max = device_fd;
-
- return max;
+ pits[next_pit++] = fd;
+
+ if(next_pit >= sizeof pits / sizeof pits[0]) {
+ next_pit = 0;
+ }
}
/*
Terminate a connection:
- - Close the socket
- - Remove associated edge and tell other connections about it if report = true
+ - Mark it as inactive
+ - Remove the edge representing this connection
+ - Kill it with fire
- Check if we need to retry making an outgoing connection
- - Deactivate the host
*/
void terminate_connection(connection_t *c, bool report) {
- if(c->status.remove)
- return;
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Closing connection with %s (%s)", c->name, c->hostname);
- ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Closing connection with %s (%s)",
- c->name, c->hostname);
-
- c->status.remove = true;
- c->status.active = false;
+ if(c->node) {
+ if(c->node->connection == c) {
+ c->node->connection = NULL;
+ }
- if(c->node)
- c->node->connection = NULL;
+ if(c->edge) {
+ if(report && !tunnelserver) {
+ send_del_edge(everyone, c->edge);
+ }
- if(c->socket)
- closesocket(c->socket);
+ edge_del(c->edge);
+ c->edge = NULL;
- if(c->edge) {
- if(report && !tunnelserver)
- send_del_edge(everyone, c->edge);
+ /* Run MST and SSSP algorithms */
- edge_del(c->edge);
+ graph();
- /* Run MST and SSSP algorithms */
+ /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
- graph();
+ if(report && !c->node->status.reachable) {
+ edge_t *e;
+ e = lookup_edge(c->node, myself);
- /* If the node is not reachable anymore but we remember it had an edge to us, clean it up */
+ if(e) {
+ if(!tunnelserver) {
+ send_del_edge(everyone, e);
+ }
- if(report && !c->node->status.reachable) {
- edge_t *e;
- e = lookup_edge(c->node, myself);
- if(e) {
- if(!tunnelserver)
- send_del_edge(everyone, e);
- edge_del(e);
+ edge_del(e);
+ }
}
}
}
+ outgoing_t *outgoing = c->outgoing;
+ connection_del(c);
+
/* Check if this was our outgoing connection */
- if(c->outgoing) {
- retry_outgoing(c->outgoing);
- c->outgoing = NULL;
+ if(outgoing) {
+ do_outgoing_connection(outgoing);
}
- free(c->outbuf);
- c->outbuf = NULL;
- c->outbuflen = 0;
- c->outbufsize = 0;
- c->outbufstart = 0;
+#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 check_dead_connections(void) {
- avl_node_t *node, *next;
- connection_t *c;
-
- for(node = connection_tree->head; node; node = next) {
- next = node->next;
- c = node->data;
-
- if(c->last_ping_time + pingtimeout <= now) {
- if(c->status.active) {
- if(c->status.pinged) {
- ifdebug(CONNECTIONS) logger(LOG_INFO, "%s (%s) didn't respond to PING in %ld seconds",
- c->name, c->hostname, now - c->last_ping_time);
- c->status.timeout = true;
- terminate_connection(c, true);
- } else if(c->last_ping_time + pinginterval <= now) {
- send_ping(c);
- }
- } else {
- if(c->status.remove) {
- logger(LOG_WARNING, "Old connection_t for %s (%s) status %04x still lingering, deleting...",
- c->name, c->hostname, bitfield_to_int(&c->status, sizeof c->status));
- connection_del(c);
- continue;
- }
- ifdebug(CONNECTIONS) logger(LOG_WARNING, "Timeout from %s (%s) during authentication",
- c->name, c->hostname);
- if(c->status.connecting) {
- c->status.connecting = false;
- closesocket(c->socket);
- do_outgoing_connection(c);
- } else {
- terminate_connection(c, false);
- }
- }
- }
-
- if(c->outbuflen > 0 && c->last_flushed_time + pingtimeout <= now) {
- if(c->status.active) {
- ifdebug(CONNECTIONS) logger(LOG_INFO,
- "%s (%s) could not flush for %ld seconds (%d bytes remaining)",
- c->name, c->hostname, now - c->last_flushed_time, c->outbuflen);
- c->status.timeout = true;
- terminate_connection(c, true);
- }
- }
+static void timeout_handler(void *data) {
+
+ bool close_all_connections = false;
+
+ /*
+ timeout_handler will start after 30 seconds from start of tincd
+ hold information about the elapsed time since last time the handler
+ has been run
+ */
+ long sleep_time = now.tv_sec - last_periodic_run_time.tv_sec;
+
+ /*
+ It seems that finding sane default value is harder than expected
+ Since we send every second a UDP packet to make holepunching work
+ And default UDP state expire on firewalls is between 15-30 seconds
+ we drop all connections after 60 Seconds - UDPDiscoveryTimeout=30
+ by default
+ */
+ if(sleep_time > 2 * udp_discovery_timeout) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Awaking from dead after %ld seconds of sleep", sleep_time);
+ /*
+ Do not send any packets to tinc after we wake up.
+ The other node probably closed our connection but we still
+ are holding context information to them. This may happen on
+ laptops or any other hardware which can be suspended for some time.
+ Sending any data to node that wasn't expecting it will produce
+ annoying and misleading errors on the other side about failed signature
+ verification and or about missing sptps context
+ */
+ close_all_connections = true;
}
-}
-/*
- check all connections to see if anything
- happened on their sockets
-*/
-static void check_network_activity(fd_set * readset, fd_set * writeset) {
- connection_t *c;
- avl_node_t *node;
- int result, i;
- socklen_t len = sizeof(result);
- vpn_packet_t packet;
- static int errors = 0;
-
- /* check input from kernel */
- if(device_fd >= 0 && FD_ISSET(device_fd, readset)) {
- if(devops.read(&packet)) {
- errors = 0;
- packet.priority = 0;
- route(myself, &packet);
- } else {
- usleep(errors * 50000);
- errors++;
- if(errors > 10) {
- logger(LOG_ERR, "Too many errors from %s, exiting!", device);
- running = false;
- }
+ last_periodic_run_time = now;
+
+ for list_each(connection_t, c, connection_list) {
+ // control connections (eg. tinc ctl) do not have any timeout
+ if(c->status.control) {
+ continue;
}
- }
- /* check meta connections */
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
+ if(close_all_connections) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Forcing connection close after sleep time %s (%s)", c->name, c->hostname);
+ terminate_connection(c, c->edge);
+ continue;
+ }
- if(c->status.remove)
+ // Bail out early if we haven't reached the ping timeout for this node yet
+ if(c->last_ping_time + pingtimeout > now.tv_sec) {
continue;
+ }
- if(FD_ISSET(c->socket, readset)) {
+ // timeout during connection establishing
+ if(!c->edge) {
if(c->status.connecting) {
- c->status.connecting = false;
- getsockopt(c->socket, SOL_SOCKET, SO_ERROR, (void *)&result, &len);
-
- if(!result)
- finish_connecting(c);
- else {
- ifdebug(CONNECTIONS) logger(LOG_DEBUG,
- "Error while connecting to %s (%s): %s",
- c->name, c->hostname, sockstrerror(result));
- closesocket(c->socket);
- do_outgoing_connection(c);
- continue;
- }
+ 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);
+ c->status.tarpit = true;
}
- if(!receive_meta(c)) {
- terminate_connection(c, c->status.active);
- continue;
- }
+ terminate_connection(c, c->edge);
+ continue;
}
- if(FD_ISSET(c->socket, writeset)) {
- if(!flush_meta(c)) {
- terminate_connection(c, c->status.active);
- continue;
- }
- }
- }
+ // helps in UDP holepunching
+ try_tx(c->node, false);
- for(i = 0; i < listen_sockets; i++) {
- if(FD_ISSET(listen_socket[i].udp, readset))
- handle_incoming_vpn_data(listen_socket[i].udp);
+ // timeout during ping
+ 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.tv_sec - c->last_ping_time));
+ terminate_connection(c, c->edge);
+ continue;
+ }
- if(FD_ISSET(listen_socket[i].tcp, readset))
- handle_new_meta_connection(listen_socket[i].tcp);
+ // check whether we need to send a new ping
+ if(c->last_ping_time + pinginterval <= now.tv_sec) {
+ send_ping(c);
+ }
}
+
+ timeout_set(data, &(struct timeval) {
+ 1, rand() % 100000
+ });
}
-/*
- this is where it all happens...
-*/
-int main_loop(void) {
- fd_set readset, writeset;
-#ifdef HAVE_PSELECT
- struct timespec tv;
- sigset_t omask, block_mask;
- time_t next_event;
-#else
- struct timeval tv;
-#endif
- int r, maxfd;
- time_t last_ping_check, last_config_check, last_graph_dump;
- event_t *event;
-
- last_ping_check = now;
- last_config_check = now;
- last_graph_dump = now;
-
- srand(now);
-
-#ifdef HAVE_PSELECT
- if(lookup_config(config_tree, "GraphDumpFile"))
- graph_dump = true;
- /* Block SIGHUP & SIGALRM */
- sigemptyset(&block_mask);
- sigaddset(&block_mask, SIGHUP);
- sigaddset(&block_mask, SIGALRM);
- sigprocmask(SIG_BLOCK, &block_mask, &omask);
-#endif
+static void periodic_handler(void *data) {
+ /* 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.
+ */
+
+ 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);
+ nanosleep(&(struct timespec) {
+ sleeptime, 0
+ }, NULL);
+ sleeptime *= 2;
+
+ if(sleeptime < 0) {
+ sleeptime = 3600;
+ }
+ } else {
+ sleeptime /= 2;
- running = true;
-
- while(running) {
-#ifdef HAVE_PSELECT
- next_event = last_ping_check + pingtimeout;
- if(graph_dump && next_event > last_graph_dump + 60)
- next_event = last_graph_dump + 60;
-
- if((event = peek_next_event()) && next_event > event->time)
- next_event = event->time;
-
- if(next_event <= now)
- tv.tv_sec = 0;
- else
- tv.tv_sec = next_event - now;
- tv.tv_nsec = 0;
-#else
- tv.tv_sec = 1;
- tv.tv_usec = 0;
-#endif
+ if(sleeptime < 10) {
+ sleeptime = 10;
+ }
+ }
- maxfd = build_fdset(&readset, &writeset);
+ contradicting_add_edge = 0;
+ contradicting_del_edge = 0;
-#ifdef HAVE_MINGW
- LeaveCriticalSection(&mutex);
-#endif
-#ifdef HAVE_PSELECT
- r = pselect(maxfd + 1, &readset, &writeset, NULL, &tv, &omask);
-#else
- r = select(maxfd + 1, &readset, &writeset, NULL, &tv);
-#endif
- now = time(NULL);
-#ifdef HAVE_MINGW
- EnterCriticalSection(&mutex);
-#endif
+ /* If AutoConnect is set, check if we need to make or break connections. */
- if(r < 0) {
- if(!sockwouldblock(sockerrno)) {
- logger(LOG_ERR, "Error while waiting for input: %s", sockstrerror(sockerrno));
- dump_connections();
- return 1;
- }
- }
+ if(autoconnect && node_tree->count > 1) {
+ do_autoconnect();
+ }
- if(r > 0)
- check_network_activity(&readset, &writeset);
+ timeout_set(data, &(struct timeval) {
+ 5, rand() % 100000
+ });
+}
- if(do_purge) {
- purge();
- do_purge = false;
+void handle_meta_connection_data(connection_t *c) {
+ if(!receive_meta(c)) {
+ if(!c->status.control) {
+ c->status.tarpit = true;
}
- /* Let's check if everybody is still alive */
+ terminate_connection(c, c->edge);
+ return;
+ }
+}
+
+#ifndef HAVE_MINGW
+static void sigterm_handler(void *data) {
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(((signal_t *)data)->signum));
+ event_exit();
+}
- if(last_ping_check + pingtimeout <= now) {
- check_dead_connections();
- last_ping_check = now;
+static void sighup_handler(void *data) {
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(((signal_t *)data)->signum));
+ reopenlogger();
- if(routing_mode == RMODE_SWITCH)
- age_subnets();
+ if(reload_configuration()) {
+ exit(1);
+ }
+}
- age_past_requests();
+static void sigalrm_handler(void *data) {
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(((signal_t *)data)->signum));
+ retry();
+}
+#endif
- /* Should we regenerate our key? */
+int reload_configuration(void) {
+ char fname[PATH_MAX];
- if(keyexpires <= now) {
- avl_node_t *node;
- node_t *n;
+ /* Reread our own configuration file */
- ifdebug(STATUS) logger(LOG_INFO, "Expiring symmetric keys");
+ exit_configuration(&config_tree);
+ init_configuration(&config_tree);
- for(node = node_tree->head; node; node = node->next) {
- n = node->data;
- if(n->inkey) {
- free(n->inkey);
- n->inkey = NULL;
- }
- }
+ if(!read_server_config()) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reread configuration file.");
+ return EINVAL;
+ }
- send_key_changed();
- keyexpires = now + keylifetime;
- }
+ read_config_options(config_tree, NULL);
- /* Detect ADD_EDGE/DEL_EDGE storms that are caused when
- * two tinc daemons with the same name are on the VPN.
- * If so, sleep a while. If this happens multiple times
- * in a row, sleep longer. */
-
- if(contradicting_del_edge > 100 && contradicting_add_edge > 100) {
- logger(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;
- }
+ snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, myself->name);
+ read_config_file(config_tree, fname, true);
- contradicting_add_edge = 0;
- contradicting_del_edge = 0;
- }
+ /* Parse some options that are allowed to be changed while tinc is running */
- if(sigalrm) {
- avl_node_t *node;
- logger(LOG_INFO, "Flushing event queue");
- expire_events();
- for(node = connection_tree->head; node; node = node->next) {
- connection_t *c = node->data;
- send_ping(c);
- }
- sigalrm = false;
- }
+ setup_myself_reloadable();
- while((event = get_expired_event())) {
- event->handler(event->data);
- free_event(event);
- }
+ /* If StrictSubnet is set, expire deleted Subnets and read new ones in */
- if(sighup) {
- connection_t *c;
- avl_node_t *node, *next;
- char *fname;
- struct stat s;
-
- sighup = false;
+ if(strictsubnets) {
+ for splay_each(subnet_t, subnet, subnet_tree)
+ if(subnet->owner) {
+ subnet->expires = 1;
+ }
+ }
- reopenlogger();
-
- /* Reread our own configuration file */
+ for splay_each(node_t, n, node_tree) {
+ n->status.has_address = false;
+ }
- exit_configuration(&config_tree);
- init_configuration(&config_tree);
+ load_all_nodes();
- if(!read_server_config()) {
- logger(LOG_ERR, "Unable to reread configuration file, exitting.");
- return 1;
+ if(strictsubnets) {
+ for splay_each(subnet_t, subnet, subnet_tree) {
+ if(!subnet->owner) {
+ continue;
}
- /* Cancel non-active outgoing connections */
+ if(subnet->expires == 1) {
+ send_del_subnet(everyone, subnet);
- for(node = connection_tree->head; node; node = next) {
- next = node->next;
- c = node->data;
+ if(subnet->owner->status.reachable) {
+ subnet_update(subnet->owner, subnet, false);
+ }
- c->outgoing = NULL;
+ subnet_del(subnet->owner, subnet);
+ } else if(subnet->expires == -1) {
+ subnet->expires = 0;
+ } else {
+ send_add_subnet(everyone, subnet);
- if(c->status.connecting) {
- terminate_connection(c, false);
- connection_del(c);
+ if(subnet->owner->status.reachable) {
+ subnet_update(subnet->owner, subnet, true);
}
}
+ }
+ } else { /* Only read our own subnets back in */
+ for splay_each(subnet_t, subnet, myself->subnet_tree)
+ if(!subnet->expires) {
+ subnet->expires = 1;
+ }
- /* Wipe list of outgoing connections */
+ config_t *cfg = lookup_config(config_tree, "Subnet");
- for(list_node_t *node = outgoing_list->head; node; node = node->next) {
- outgoing_t *outgoing = node->data;
+ while(cfg) {
+ subnet_t *subnet, *s2;
+
+ if(get_config_subnet(cfg, &subnet)) {
+ if((s2 = lookup_subnet(myself, subnet))) {
+ if(s2->expires == 1) {
+ s2->expires = 0;
+ }
- if(outgoing->event)
- event_del(outgoing->event);
+ free_subnet(subnet);
+ } else {
+ subnet_add(myself, subnet);
+ send_add_subnet(everyone, subnet);
+ subnet_update(myself, subnet, true);
+ }
}
- list_delete_list(outgoing_list);
-
- /* Close connections to hosts that have a changed or deleted host config file */
-
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
-
- xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
- if(stat(fname, &s) || s.st_mtime > last_config_check)
- terminate_connection(c, c->status.active);
- free(fname);
+ cfg = lookup_config_next(config_tree, cfg);
+ }
+
+ 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);
}
+ }
+ }
- last_config_check = now;
+ /* Try to make outgoing connections */
- /* If StrictSubnet is set, expire deleted Subnets and read new ones in */
+ try_outgoing_connections();
- if(strictsubnets) {
- subnet_t *subnet;
+ /* Close connections to hosts that have a changed or deleted host config file */
- for(node = subnet_tree->head; node; node = node->next) {
- subnet = node->data;
- subnet->expires = 1;
- }
+ for list_each(connection_t, c, connection_list) {
+ if(c->status.control) {
+ continue;
+ }
- load_all_subnets();
-
- for(node = subnet_tree->head; node; node = next) {
- next = node->next;
- subnet = node->data;
- 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;
- } else {
- send_add_subnet(everyone, subnet);
- if(subnet->owner->status.reachable)
- subnet_update(subnet->owner, subnet, true);
- }
- }
- }
+ snprintf(fname, sizeof(fname), "%s" SLASH "hosts" SLASH "%s", confbase, c->name);
+ struct stat s;
- /* Try to make outgoing connections */
-
- try_outgoing_connections();
+ 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->edge);
}
-
- /* Dump graph if wanted every 60 seconds*/
+ }
- if(last_graph_dump + 60 <= now) {
- dump_graph();
- last_graph_dump = now;
+ last_config_check = now.tv_sec;
+
+ return 0;
+}
+
+void retry(void) {
+ /* Reset the reconnection timers for all outgoing connections */
+ for list_each(outgoing_t, outgoing, outgoing_list) {
+ outgoing->timeout = 0;
+
+ if(outgoing->ev.cb)
+ timeout_set(&outgoing->ev, &(struct timeval) {
+ 0, 0
+ });
+ }
+
+ /* Check for outgoing connections that are in progress, and reset their ping timers */
+ for list_each(connection_t, c, connection_list) {
+ if(c->outgoing && !c->node) {
+ c->last_ping_time = 0;
}
}
-#ifdef HAVE_PSELECT
- /* Restore SIGHUP & SIGALARM mask */
- sigprocmask(SIG_SETMASK, &omask, NULL);
+ /* Kick the ping timeout handler */
+ timeout_set(&pingtimer, &(struct timeval) {
+ 0, 0
+ });
+}
+
+/*
+ this is where it all happens...
+*/
+int main_loop(void) {
+ last_periodic_run_time = now;
+ timeout_add(&pingtimer, timeout_handler, &pingtimer, &(struct timeval) {
+ pingtimeout, rand() % 100000
+ });
+ timeout_add(&periodictimer, periodic_handler, &periodictimer, &(struct timeval) {
+ 0, 0
+ });
+
+#ifndef HAVE_MINGW
+ signal_t sighup = {0};
+ signal_t sigterm = {0};
+ signal_t sigquit = {0};
+ signal_t sigint = {0};
+ signal_t sigalrm = {0};
+
+ signal_add(&sighup, sighup_handler, &sighup, SIGHUP);
+ signal_add(&sigterm, sigterm_handler, &sigterm, SIGTERM);
+ signal_add(&sigquit, sigterm_handler, &sigquit, SIGQUIT);
+ signal_add(&sigint, sigterm_handler, &sigint, SIGINT);
+ signal_add(&sigalrm, sigalrm_handler, &sigalrm, SIGALRM);
+#endif
+
+ if(!event_loop()) {
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while waiting for input: %s", sockstrerror(sockerrno));
+ return 1;
+ }
+
+#ifndef HAVE_MINGW
+ signal_del(&sighup);
+ signal_del(&sigterm);
+ signal_del(&sigquit);
+ signal_del(&sigint);
+ signal_del(&sigalrm);
#endif
+ timeout_del(&periodictimer);
+ timeout_del(&pingtimer);
+
return 0;
}