X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=d6f4403b487c117f9d9aaf6f6ea8dca339e7abcf;hp=475ea0c98e7213dce8da31532ac42310298d86af;hb=762cc2d2797d62ab593ea64d8ceeb4fe96be2a0d;hpb=eefa28059ab989c915a7d95fb4ae728abd7ce713

diff --git a/src/net.c b/src/net.c
index 475ea0c9..d6f4403b 100644
--- a/src/net.c
+++ b/src/net.c
@@ -17,7 +17,7 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: net.c,v 1.35.4.192 2003/07/22 20:55:19 guus Exp $
+    $Id: net.c,v 1.35.4.199 2003/08/28 15:27:11 guus Exp $
 */
 
 #include "system.h"
@@ -39,8 +39,10 @@
 #include "protocol.h"
 #include "route.h"
 #include "subnet.h"
+#include "xalloc.h"
 
 bool do_purge = false;
+volatile bool running = false;
 
 time_t now = 0;
 
@@ -57,6 +59,8 @@ static void purge(void)
 
 	ifdebug(PROTOCOL) logger(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 = (node_t *) nnode->data;
@@ -78,8 +82,26 @@ static void purge(void)
 				send_del_edge(broadcast, 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 = (node_t *) nnode->data;
+
+		if(!n->status.reachable) {
+			for(enode = edge_weight_tree->head; enode; enode = enext) {
+				enext = enode->next;
+				e = (edge_t *) enode->data;
 
-			node_del(n);
+				if(e->to == n)
+					break;
+			}
+
+			if(!enode)
+				node_del(n);
 		}
 	}
 }
@@ -153,7 +175,7 @@ void terminate_connection(connection_t *c, bool report)
 		c->node->connection = NULL;
 
 	if(c->socket)
-		close(c->socket);
+		closesocket(c->socket);
 
 	if(c->edge) {
 		if(report)
@@ -164,6 +186,17 @@ void terminate_connection(connection_t *c, bool report)
 		/* Run MST and SSSP algorithms */
 
 		graph();
+
+		/* 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) {
+			edge_t *e;
+			e = lookup_edge(c->node, myself);
+			if(e) {
+				send_del_edge(broadcast, e);
+				edge_del(e);
+			}
+		}
 	}
 
 	/* Check if this was our outgoing connection */
@@ -206,7 +239,7 @@ static void check_dead_connections(void)
 			} else {
 				if(c->status.remove) {
 					logger(LOG_WARNING, _("Old connection_t for %s (%s) status %04x still lingering, deleting..."),
-						   c->name, c->hostname, c->status);
+						   c->name, c->hostname, *(uint32_t *)&c->status);
 					connection_del(c);
 					continue;
 				}
@@ -254,7 +287,7 @@ static void check_network_activity(fd_set * f)
 					ifdebug(CONNECTIONS) logger(LOG_DEBUG,
 							   _("Error while connecting to %s (%s): %s"),
 							   c->name, c->hostname, strerror(result));
-					close(c->socket);
+					closesocket(c->socket);
 					do_outgoing_connection(c);
 					continue;
 				}
@@ -279,7 +312,7 @@ static void check_network_activity(fd_set * f)
 /*
   this is where it all happens...
 */
-void main_loop(void)
+int main_loop(void)
 {
 	fd_set fset;
 	struct timeval tv;
@@ -293,7 +326,9 @@ void main_loop(void)
 	last_config_check = now;
 	srand(now);
 
-	for(;;) {
+	running = true;
+
+	while(running) {
 		now = time(NULL);
 
 		tv.tv_sec = 1 + (rand() & 7);	/* Approx. 5 seconds, randomized to prevent global synchronisation effects */
@@ -309,7 +344,7 @@ void main_loop(void)
 					   strerror(errno));
 				cp_trace();
 				dump_connections();
-				return;
+				return 1;
 			}
 
 			continue;
@@ -339,7 +374,8 @@ void main_loop(void)
 				ifdebug(STATUS) logger(LOG_INFO, _("Regenerating symmetric key"));
 
 				RAND_pseudo_bytes(myself->key, myself->keylength);
-				EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len);
+				if(myself->cipher)
+					EVP_DecryptInit_ex(&packet_ctx, myself->cipher, NULL, myself->key, myself->key + myself->cipher->key_len);
 				send_key_changed(broadcast, myself);
 				keyexpires = now + keylifetime;
 			}
@@ -377,7 +413,7 @@ void main_loop(void)
 
 			if(!read_server_config()) {
 				logger(LOG_ERR, _("Unable to reread configuration file, exitting."));
-				exit(1);
+				return 1;
 			}
 
 			/* Close connections to hosts that have a changed or deleted host config file */
@@ -403,8 +439,8 @@ void main_loop(void)
 			/* Try to make outgoing connections */
 			
 			try_outgoing_connections();
-						
-			continue;
 		}
 	}
+
+	return 0;
 }