along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id: net.c,v 1.35.4.179 2002/09/09 19:39:58 guus Exp $
+ $Id: net.c,v 1.35.4.180 2002/09/09 21:24:34 guus Exp $
*/
#include "config.h"
#include <netdb.h>
#include <netinet/in.h>
#ifdef HAVE_NETINET_IN_SYSTM_H
- #include <netinet/in_systm.h>
+#include <netinet/in_systm.h>
#endif
#ifdef HAVE_NETINET_IP_H
- #include <netinet/ip.h>
+#include <netinet/ip.h>
#endif
#ifdef HAVE_NETINET_TCP_H
- #include <netinet/tcp.h>
+#include <netinet/tcp.h>
#endif
#include <stdio.h>
#include <stdlib.h>
void purge(void)
{
- avl_node_t *nnode, *nnext, *enode, *enext, *snode, *snext;
- node_t *n;
- edge_t *e;
- subnet_t *s;
- cp();
- if(debug_lvl >= DEBUG_PROTOCOL)
- syslog(LOG_DEBUG, _("Purging unreachable nodes"));
-
- for(nnode = node_tree->head; nnode; nnode = nnext)
- {
- nnext = nnode->next;
- n = (node_t *)nnode->data;
-
- if(!n->status.reachable)
- {
- if(debug_lvl >= DEBUG_SCARY_THINGS)
- syslog(LOG_DEBUG, _("Purging node %s (%s)"), n->name, n->hostname);
-
- for(snode = n->subnet_tree->head; snode; snode = snext)
- {
- snext = snode->next;
- s = (subnet_t *)snode->data;
- send_del_subnet(broadcast, s);
- subnet_del(n, s);
- }
-
- for(enode = n->edge_tree->head; enode; enode = enext)
- {
- enext = enode->next;
- e = (edge_t *)enode->data;
- send_del_edge(broadcast, e);
- edge_del(e);
- }
-
- node_del(n);
- }
- }
- cp();
+ avl_node_t *nnode, *nnext, *enode, *enext, *snode, *snext;
+ node_t *n;
+ edge_t *e;
+ subnet_t *s;
+
+ cp();
+
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_DEBUG, _("Purging unreachable nodes"));
+
+ for(nnode = node_tree->head; nnode; nnode = nnext) {
+ nnext = nnode->next;
+ n = (node_t *) nnode->data;
+
+ if(!n->status.reachable) {
+ if(debug_lvl >= DEBUG_SCARY_THINGS)
+ syslog(LOG_DEBUG, _("Purging node %s (%s)"), n->name,
+ n->hostname);
+
+ for(snode = n->subnet_tree->head; snode; snode = snext) {
+ snext = snode->next;
+ s = (subnet_t *) snode->data;
+ send_del_subnet(broadcast, s);
+ subnet_del(n, s);
+ }
+
+ for(enode = n->edge_tree->head; enode; enode = enext) {
+ enext = enode->next;
+ e = (edge_t *) enode->data;
+ send_del_edge(broadcast, e);
+ edge_del(e);
+ }
+
+ node_del(n);
+ }
+ }
}
/*
put all file descriptors in an fd_set array
While we're at it, purge stuff that needs to be removed.
*/
-void build_fdset(fd_set *fs)
+void build_fdset(fd_set * fs)
{
- avl_node_t *node, *next;
- connection_t *c;
- int i;
- cp();
- FD_ZERO(fs);
-
- for(node = connection_tree->head; node; node = next)
- {
- next = node->next;
- c = (connection_t *)node->data;
-
- if(c->status.remove)
- {
- connection_del(c);
- if(!connection_tree->head)
- purge();
- }
- else
- FD_SET(c->socket, fs);
- }
-
- for(i = 0; i < listen_sockets; i++)
- {
- FD_SET(listen_socket[i].tcp, fs);
- FD_SET(listen_socket[i].udp, fs);
- }
-
- FD_SET(device_fd, fs);
- cp();
+ avl_node_t *node, *next;
+ connection_t *c;
+ int i;
+
+ cp();
+
+ FD_ZERO(fs);
+
+ for(node = connection_tree->head; node; node = next) {
+ next = node->next;
+ c = (connection_t *) node->data;
+
+ if(c->status.remove) {
+ connection_del(c);
+ if(!connection_tree->head)
+ purge();
+ } else
+ FD_SET(c->socket, fs);
+ }
+
+ for(i = 0; i < listen_sockets; i++) {
+ FD_SET(listen_socket[i].tcp, fs);
+ FD_SET(listen_socket[i].udp, fs);
+ }
+
+ FD_SET(device_fd, fs);
}
/*
- Check if we need to retry making an outgoing connection
- Deactivate the host
*/
-void terminate_connection(connection_t *c, int report)
+void terminate_connection(connection_t * c, int report)
{
- cp();
- if(c->status.remove)
- return;
+ cp();
+
+ if(c->status.remove)
+ return;
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_NOTICE, _("Closing connection with %s (%s)"),
- c->name, c->hostname);
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_NOTICE, _("Closing connection with %s (%s)"),
+ c->name, c->hostname);
- c->status.remove = 1;
- c->status.active = 0;
+ c->status.remove = 1;
+ c->status.active = 0;
- if(c->node)
- c->node->connection = NULL;
+ if(c->node)
+ c->node->connection = NULL;
- if(c->socket)
- close(c->socket);
+ if(c->socket)
+ close(c->socket);
- if(c->edge)
- {
- if(report)
- send_del_edge(broadcast, c->edge);
+ if(c->edge) {
+ if(report)
+ send_del_edge(broadcast, c->edge);
- edge_del(c->edge);
+ edge_del(c->edge);
- /* Run MST and SSSP algorithms */
+ /* Run MST and SSSP algorithms */
- graph();
- }
+ graph();
+ }
- /* Check if this was our outgoing connection */
+ /* Check if this was our outgoing connection */
- if(c->outgoing)
- {
- retry_outgoing(c->outgoing);
- c->outgoing = NULL;
- }
- cp();
+ if(c->outgoing) {
+ retry_outgoing(c->outgoing);
+ c->outgoing = NULL;
+ }
}
/*
*/
void check_dead_connections(void)
{
- avl_node_t *node, *next;
- connection_t *c;
- cp();
- for(node = connection_tree->head; node; node = next)
- {
- next = node->next;
- c = (connection_t *)node->data;
- if(c->last_ping_time + pingtimeout < now)
- {
- if(c->status.active)
- {
- if(c->status.pinged)
- {
- if(debug_lvl >= DEBUG_PROTOCOL)
- syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
- c->name, c->hostname);
- c->status.timeout = 1;
- terminate_connection(c, 1);
- }
- else
- {
- send_ping(c);
- }
- }
- else
- {
- if(c->status.remove)
- {
- syslog(LOG_WARNING, _("Old connection_t for %s (%s) status %04x still lingering, deleting..."), c->name, c->hostname, c->status);
- connection_del(c);
- continue;
- }
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_WARNING, _("Timeout from %s (%s) during authentication"),
- c->name, c->hostname);
- terminate_connection(c, 0);
- }
- }
- }
- cp();
+ avl_node_t *node, *next;
+ connection_t *c;
+
+ cp();
+
+ for(node = connection_tree->head; node; node = next) {
+ next = node->next;
+ c = (connection_t *) node->data;
+
+ if(c->last_ping_time + pingtimeout < now) {
+ if(c->status.active) {
+ if(c->status.pinged) {
+ if(debug_lvl >= DEBUG_PROTOCOL)
+ syslog(LOG_INFO, _("%s (%s) didn't respond to PING"),
+ c->name, c->hostname);
+ c->status.timeout = 1;
+ terminate_connection(c, 1);
+ } else {
+ send_ping(c);
+ }
+ } else {
+ if(c->status.remove) {
+ syslog(LOG_WARNING, _("Old connection_t for %s (%s) status %04x still lingering, deleting..."),
+ c->name, c->hostname, c->status);
+ connection_del(c);
+ continue;
+ }
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_WARNING, _("Timeout from %s (%s) during authentication"),
+ c->name, c->hostname);
+ terminate_connection(c, 0);
+ }
+ }
+ }
}
/*
check all connections to see if anything
happened on their sockets
*/
-void check_network_activity(fd_set *f)
+void check_network_activity(fd_set * f)
{
- connection_t *c;
- avl_node_t *node;
- int result, i;
- int len = sizeof(result);
- vpn_packet_t packet;
- cp();
- if(FD_ISSET(device_fd, f))
- {
- if(!read_packet(&packet))
- route_outgoing(&packet);
- }
-
- for(node = connection_tree->head; node; node = node->next)
- {
- c = (connection_t *)node->data;
-
- if(c->status.remove)
- continue;
-
- if(FD_ISSET(c->socket, f))
- {
- if(c->status.connecting)
- {
- c->status.connecting = 0;
- getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len);
- if(!result)
- finish_connecting(c);
- else
- {
- if(debug_lvl >= DEBUG_CONNECTIONS)
- syslog(LOG_DEBUG, _("Error while connecting to %s (%s): %s"), c->name, c->hostname, strerror(result));
- close(c->socket);
- do_outgoing_connection(c);
- continue;
- }
- }
- if(receive_meta(c) < 0)
- {
- terminate_connection(c, c->status.active);
- continue;
- }
- }
- }
-
- for(i = 0; i < listen_sockets; i++)
- {
- if(FD_ISSET(listen_socket[i].udp, f))
- handle_incoming_vpn_data(listen_socket[i].udp);
- if(FD_ISSET(listen_socket[i].tcp, f))
- handle_new_meta_connection(listen_socket[i].tcp);
- }
- cp();
+ connection_t *c;
+ avl_node_t *node;
+ int result, i;
+ int len = sizeof(result);
+ vpn_packet_t packet;
+
+ cp();
+
+ if(FD_ISSET(device_fd, f)) {
+ if(!read_packet(&packet))
+ route_outgoing(&packet);
+ }
+
+ for(node = connection_tree->head; node; node = node->next) {
+ c = (connection_t *) node->data;
+
+ if(c->status.remove)
+ continue;
+
+ if(FD_ISSET(c->socket, f)) {
+ if(c->status.connecting) {
+ c->status.connecting = 0;
+ getsockopt(c->socket, SOL_SOCKET, SO_ERROR, &result, &len);
+
+ if(!result)
+ finish_connecting(c);
+ else {
+ if(debug_lvl >= DEBUG_CONNECTIONS)
+ syslog(LOG_DEBUG,
+ _("Error while connecting to %s (%s): %s"),
+ c->name, c->hostname, strerror(result));
+ close(c->socket);
+ do_outgoing_connection(c);
+ continue;
+ }
+ }
+
+ if(receive_meta(c) < 0) {
+ terminate_connection(c, c->status.active);
+ continue;
+ }
+ }
+ }
+
+ for(i = 0; i < listen_sockets; i++) {
+ if(FD_ISSET(listen_socket[i].udp, f))
+ handle_incoming_vpn_data(listen_socket[i].udp);
+
+ if(FD_ISSET(listen_socket[i].tcp, f))
+ handle_new_meta_connection(listen_socket[i].tcp);
+ }
}
/*
*/
void main_loop(void)
{
- fd_set fset;
- struct timeval tv;
- int r;
- time_t last_ping_check;
- event_t *event;
- cp();
- last_ping_check = now;
-
- srand(now);
-
- for(;;)
- {
- now = time(NULL);
-
- tv.tv_sec = 1 + (rand() & 7); /* Approx. 5 seconds, randomized to prevent global synchronisation effects */
- tv.tv_usec = 0;
-
- build_fdset(&fset);
-
- r = select(FD_SETSIZE, &fset, NULL, NULL, &tv);
-
- if(r < 0)
- {
- if(errno != EINTR && errno != EAGAIN)
- {
- syslog(LOG_ERR, _("Error while waiting for input: %s"), strerror(errno));
- cp_trace();
- dump_connections();
- return;
- }
-
- continue;
- }
-
- check_network_activity(&fset);
-
- if(do_purge)
- {
- purge();
- do_purge = 0;
- }
-
- /* Let's check if everybody is still alive */
-
- if(last_ping_check + pingtimeout < now)
- {
- check_dead_connections();
- last_ping_check = now;
-
- if(routing_mode== RMODE_SWITCH)
- age_mac();
-
- age_past_requests();
-
- /* Should we regenerate our key? */
-
- if(keyexpires < now)
- {
- if(debug_lvl >= DEBUG_STATUS)
- syslog(LOG_INFO, _("Regenerating symmetric key"));
-
- RAND_pseudo_bytes(myself->key, myself->keylength);
- send_key_changed(broadcast, myself);
- keyexpires = now + keylifetime;
- }
- }
-
-
- while((event = get_expired_event()))
- {
- event->handler(event->data);
- free(event);
- }
-
- if(sigalrm)
- {
- syslog(LOG_INFO, _("Flushing event queue"));
-
- while(event_tree->head)
- {
- event = (event_t *)event_tree->head->data;
- event->handler(event->data);
- event_del(event);
- }
- sigalrm = 0;
- }
-
- if(sighup)
- {
- sighup = 0;
- close_network_connections();
- exit_configuration(&config_tree);
-
- syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds..."));
- sleep(5);
-
- init_configuration(&config_tree);
-
- if(read_server_config())
- {
- syslog(LOG_ERR, _("Unable to reread configuration file, exitting."));
- exit(1);
- }
-
- if(setup_network_connections())
- return;
+ fd_set fset;
+ struct timeval tv;
+ int r;
+ time_t last_ping_check;
+ event_t *event;
+
+ cp();
+
+ last_ping_check = now;
+ srand(now);
+
+ for(;;) {
+ now = time(NULL);
+
+ tv.tv_sec = 1 + (rand() & 7); /* Approx. 5 seconds, randomized to prevent global synchronisation effects */
+ tv.tv_usec = 0;
+
+ build_fdset(&fset);
+
+ r = select(FD_SETSIZE, &fset, NULL, NULL, &tv);
+
+ if(r < 0) {
+ if(errno != EINTR && errno != EAGAIN) {
+ syslog(LOG_ERR, _("Error while waiting for input: %s"),
+ strerror(errno));
+ cp_trace();
+ dump_connections();
+ return;
+ }
+
+ continue;
+ }
+
+ check_network_activity(&fset);
+
+ if(do_purge) {
+ purge();
+ do_purge = 0;
+ }
+
+ /* Let's check if everybody is still alive */
+
+ if(last_ping_check + pingtimeout < now) {
+ check_dead_connections();
+ last_ping_check = now;
+
+ if(routing_mode == RMODE_SWITCH)
+ age_mac();
+
+ age_past_requests();
+
+ /* Should we regenerate our key? */
+
+ if(keyexpires < now) {
+ if(debug_lvl >= DEBUG_STATUS)
+ syslog(LOG_INFO, _("Regenerating symmetric key"));
+
+ RAND_pseudo_bytes(myself->key, myself->keylength);
+ send_key_changed(broadcast, myself);
+ keyexpires = now + keylifetime;
+ }
+ }
+
+
+ while((event = get_expired_event())) {
+ event->handler(event->data);
+ free(event);
+ }
+
+ if(sigalrm) {
+ syslog(LOG_INFO, _("Flushing event queue"));
+
+ while(event_tree->head) {
+ event = (event_t *) event_tree->head->data;
+ event->handler(event->data);
+ event_del(event);
+ }
+ sigalrm = 0;
+ }
+
+ if(sighup) {
+ sighup = 0;
+ close_network_connections();
+ exit_configuration(&config_tree);
+
+ syslog(LOG_INFO, _("Rereading configuration file and restarting in 5 seconds..."));
+ sleep(5);
+
+ init_configuration(&config_tree);
+
+ if(read_server_config()) {
+ syslog(LOG_ERR,
+ _("Unable to reread configuration file, exitting."));
+ exit(1);
+ }
+
+ if(setup_network_connections())
+ return;
- continue;
- }
- }
- cp();
+ continue;
+ }
+ }
}
projects / oweals / tinc.git / blobdiff