/*
net.c -- most of the network code
Copyright (C) 1998-2005 Ivo Timmermans,
- 2000-2011 Guus Sliepen <guus@tinc-vpn.org>
+ 2000-2012 Guus Sliepen <guus@tinc-vpn.org>
2006 Scott Lamb <slamb@slamb.org>
2011 Loïc Grenié <loic.grenie@gmail.com>
#include "system.h"
#include "utils.h"
-#include "splay_tree.h"
#include "conf.h"
#include "connection.h"
#include "device.h"
int contradicting_add_edge = 0;
int contradicting_del_edge = 0;
+static int sleeptime = 10;
+time_t last_config_check = 0;
/* Purge edges and subnets of unreachable nodes. Use carefully. */
edge_t *e;
subnet_t *s;
- ifdebug(PROTOCOL) logger(LOG_DEBUG, "Purging unreachable nodes");
+ logger(DEBUG_PROTOCOL, LOG_DEBUG, "Purging unreachable nodes");
/* Remove all edges and subnets owned by unreachable nodes. */
n = nnode->data;
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;
- send_del_subnet(broadcast, s);
+ send_del_subnet(everyone, s);
if(!strictsubnets)
subnet_del(n, s);
}
enext = enode->next;
e = enode->data;
if(!tunnelserver)
- send_del_edge(broadcast, e);
+ send_del_edge(everyone, e);
edge_del(e);
}
}
/*
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) {
- ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Closing connection with %s (%s)",
- c->name, c->hostname);
+ logger(DEBUG_CONNECTIONS, LOG_NOTICE, "Closing connection with %s (%s)", c->name, c->hostname);
c->status.active = false;
- if(c->node)
+ if(c->node && c->node->connection == c)
c->node->connection = NULL;
- if(c->socket)
- closesocket(c->socket);
-
if(c->edge) {
if(report && !tunnelserver)
- send_del_edge(broadcast, c->edge);
+ send_del_edge(everyone, c->edge);
edge_del(c->edge);
+ c->edge = NULL;
/* Run MST and SSSP algorithms */
e = lookup_edge(c->node, myself);
if(e) {
if(!tunnelserver)
- send_del_edge(broadcast, e);
+ send_del_edge(everyone, e);
edge_del(e);
}
}
}
- /* Check if this was our outgoing connection */
+ outgoing_t *outgoing = c->outgoing;
+ connection_del(c);
- if(c->outgoing)
- retry_outgoing(c->outgoing);
+ /* Check if this was our outgoing connection */
- connection_del(c);
+ if(outgoing)
+ do_outgoing_connection(outgoing);
}
/*
and close the connection.
*/
static void timeout_handler(int fd, short events, void *event) {
- splay_node_t *node, *next;
- connection_t *c;
time_t now = time(NULL);
- for(node = connection_tree->head; node; node = next) {
+ for(list_node_t *node = connection_list->head, *next; node; node = next) {
next = node->next;
- c = node->data;
+ connection_t *c = node->data;
+
+ if(c->status.control)
+ continue;
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);
- terminate_connection(c, true);
- continue;
+ 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);
- }
- } else {
- if(c->status.connecting) {
- ifdebug(CONNECTIONS)
- logger(LOG_WARNING, "Timeout while connecting to %s (%s)", c->name, c->hostname);
- c->status.connecting = false;
- closesocket(c->socket);
- do_outgoing_connection(c);
+ continue;
} else {
- ifdebug(CONNECTIONS) logger(LOG_WARNING, "Timeout from %s (%s) during authentication", c->name, c->hostname);
- terminate_connection(c, false);
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);
}
+ terminate_connection(c, c->status.active);
}
}
- if(contradicting_del_edge && contradicting_add_edge) {
- logger(LOG_WARNING, "Possible node with same Name as us!");
-
- if(rand() % 3 == 0) {
- logger(LOG_ERR, "Shutting down, check configuration of all nodes for duplicate Names!");
- event_loopexit(NULL);
- return;
- }
-
- contradicting_add_edge = 0;
- contradicting_del_edge = 0;
+ 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;
}
+ contradicting_add_edge = 0;
+ contradicting_del_edge = 0;
+
event_add(event, &(struct timeval){pingtimeout, 0});
}
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);
+ logger(DEBUG_CONNECTIONS, LOG_DEBUG, "Error while connecting to %s (%s): %s", c->name, c->hostname, sockstrerror(result));
+ terminate_connection(c, false);
return;
}
}
}
static void sigterm_handler(int signal, short events, void *data) {
- logger(LOG_NOTICE, "Got %s signal", strsignal(signal));
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
event_loopexit(NULL);
}
static void sighup_handler(int signal, short events, void *data) {
- logger(LOG_NOTICE, "Got %s signal", strsignal(signal));
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
reopenlogger();
reload_configuration();
}
static void sigalrm_handler(int signal, short events, void *data) {
- logger(LOG_NOTICE, "Got %s signal", strsignal(signal));
+ logger(DEBUG_ALWAYS, LOG_NOTICE, "Got %s signal", strsignal(signal));
retry();
}
int reload_configuration(void) {
- connection_t *c;
- splay_node_t *node, *next;
char *fname;
- struct stat s;
- static time_t last_config_check = 0;
/* Reread our own configuration file */
init_configuration(&config_tree);
if(!read_server_config()) {
- logger(LOG_ERR, "Unable to reread configuration file, exitting.");
+ logger(DEBUG_ALWAYS, LOG_ERR, "Unable to reread configuration file, exitting.");
event_loopexit(NULL);
return EINVAL;
}
- /* Close connections to hosts that have a changed or deleted host config file */
-
- for(node = connection_tree->head; node; node = next) {
- c = node->data;
- next = node->next;
-
- if(c->outgoing) {
- free(c->outgoing->name);
- if(c->outgoing->ai)
- freeaddrinfo(c->outgoing->ai);
- free(c->outgoing);
- c->outgoing = NULL;
- }
-
- 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);
- }
+ read_config_options(config_tree, NULL);
- last_config_check = time(NULL);
+ xasprintf(&fname, "%s" SLASH "hosts" SLASH "%s", confbase, myself->name);
+ read_config_file(config_tree, fname);
+ free(fname);
- /* If StrictSubnet is set, expire deleted Subnets and read new ones in */
+ /* Parse some options that are allowed to be changed while tinc is running */
- if(strictsubnets) {
- subnet_t *subnet;
+ setup_myself_reloadable();
+ /* If StrictSubnet is set, expire deleted Subnets and read new ones in */
- for(node = subnet_tree->head; node; node = node->next) {
- subnet = node->data;
+ if(strictsubnets) {
+ for(splay_node_t *node = subnet_tree->head; node; node = node->next) {
+ subnet_t *subnet = node->data;
subnet->expires = 1;
}
load_all_subnets();
- for(node = subnet_tree->head; node; node = next) {
+ for(splay_node_t *node = subnet_tree->head, *next; node; node = next) {
next = node->next;
- subnet = node->data;
+ subnet_t *subnet = node->data;
if(subnet->expires == 1) {
- send_del_subnet(broadcast, subnet);
+ 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(broadcast, subnet);
+ send_add_subnet(everyone, subnet);
if(subnet->owner->status.reachable)
subnet_update(subnet->owner, subnet, true);
}
}
+ } else { /* Only read our own subnets back in */
+ for(splay_node_t *node = myself->subnet_tree->head; node; node = node->next) {
+ subnet_t *subnet = node->data;
+ if(!subnet->expires)
+ subnet->expires = 1;
+ }
+
+ config_t *cfg = lookup_config(config_tree, "Subnet");
+
+ while(cfg) {
+ subnet_t *subnet, *s2;
+
+ if(!get_config_subnet(cfg, &subnet))
+ continue;
+
+ if((s2 = lookup_subnet(myself, subnet))) {
+ if(s2->expires == 1)
+ s2->expires = 0;
+
+ free_subnet(subnet);
+ } else {
+ subnet_add(myself, subnet);
+ send_add_subnet(everyone, subnet);
+ subnet_update(myself, subnet, true);
+ }
+
+ cfg = lookup_config_next(config_tree, cfg);
+ }
+
+ for(splay_node_t *node = myself->subnet_tree->head, *next; node; node = next) {
+ next = node->next;
+ subnet_t *subnet = node->data;
+ if(subnet->expires == 1) {
+ send_del_subnet(everyone, subnet);
+ subnet_update(myself, subnet, false);
+ subnet_del(myself, subnet);
+ }
+ }
}
/* Try to make outgoing connections */
try_outgoing_connections();
+ /* Close connections to hosts that have a changed or deleted host config file */
+
+ for(list_node_t *node = connection_list->head, *next; node; node = next) {
+ connection_t *c = node->data;
+ next = node->next;
+
+ if(c->status.control)
+ continue;
+
+ 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);
+ }
+ free(fname);
+ }
+
+ last_config_check = time(NULL);
+
return 0;
}
void retry(void) {
- connection_t *c;
- splay_node_t *node;
-
- for(node = connection_tree->head; node; node = node->next) {
- c = node->data;
+ for(list_node_t *node = connection_list->head, *next; node; node = next) {
+ next = node->next;
+ connection_t *c = node->data;
if(c->outgoing && !c->node) {
if(timeout_initialized(&c->outgoing->ev))
if(c->status.connecting)
close(c->socket);
c->outgoing->timeout = 0;
- do_outgoing_connection(c);
+ terminate_connection(c, c->status.active);
}
}
}
#endif
if(event_loop(0) < 0) {
- logger(LOG_ERR, "Error while waiting for input: %s", strerror(errno));
+ logger(DEBUG_ALWAYS, LOG_ERR, "Error while waiting for input: %s", strerror(errno));
return 1;
}
projects / tinc / blobdiff