Use conditional compilation for device.c.

[tinc] / src / graph.c

diff --git a/src/graph.c b/src/graph.c
index 73db3b2..302056a 100644 (file)
--- a/src/graph.c
+++ b/src/graph.c
@@ -1,6 +1,6 @@
 /*
     graph.c -- graph algorithms
-    Copyright (C) 2001-2012 Guus Sliepen <guus@tinc-vpn.org>,
+    Copyright (C) 2001-2013 Guus Sliepen <guus@tinc-vpn.org>,
                   2001-2005 Ivo Timmermans
 
     This program is free software; you can redistribute it and/or modify
@@ -44,13 +44,13 @@
 
 #include "system.h"
 
-#include "config.h"
 #include "connection.h"
 #include "device.h"
 #include "edge.h"
 #include "graph.h"
 #include "list.h"
 #include "logger.h"
+#include "names.h"
 #include "netutl.h"
 #include "node.h"
 #include "process.h"
@@ -61,7 +61,7 @@
 #include "graph.h"
 
 /* Implementation of Kruskal's algorithm.
-   Running time: O(E)
+   Running time: O(EN)
    Please note that sorting on weight is already done by add_edge().
 */
 
@@ -78,11 +78,24 @@ static void mst_kruskal(void) {
        for splay_each(node_t, n, node_tree)
                n->status.visited = false;
 
+       /* Starting point */
+
+       for splay_each(edge_t, e, edge_weight_tree) {
+               if(e->from->status.reachable) {
+                       e->from->status.visited = true;
+                       break;
+               }
+       }
+
        /* Add safe edges */
 
+       bool skipped = false;
+
        for splay_each(edge_t, e, edge_weight_tree) {
-               if(!e->reverse || (e->from->status.visited && e->to->status.visited))
+               if(!e->reverse || (e->from->status.visited == e->to->status.visited)) {
+                       skipped = true;
                        continue;
+               }
 
                e->from->status.visited = true;
                e->to->status.visited = true;
@@ -93,8 +106,12 @@ static void mst_kruskal(void) {
                if(e->reverse->connection)
                        e->reverse->connection->status.mst = true;
 
-               logger(DEBUG_SCARY_THINGS, LOG_DEBUG, " Adding edge %s - %s weight %d", e->from->name,
-                                  e->to->name, e->weight);
+               logger(DEBUG_SCARY_THINGS, LOG_DEBUG, " Adding edge %s - %s weight %d", e->from->name, e->to->name, e->weight);
+
+               if(skipped) {
+                       skipped = false;
+                       next = edge_weight_tree->head;
+               }
        }
 }
 
@@ -186,7 +203,7 @@ static void check_reachability(void) {
        for splay_each(node_t, n, node_tree) {
                if(n->status.visited != n->status.reachable) {
                        n->status.reachable = !n->status.reachable;
-                       n->last_state_change = time(NULL);
+                       n->last_state_change = now.tv_sec;
 
                        if(n->status.reachable) {
                                logger(DEBUG_TRAFFIC, LOG_DEBUG, "Node %s (%s) became reachable",