Immediately exchange keys when establishing a meta connection.

[tinc] / src / graph.c

diff --git a/src/graph.c b/src/graph.c
index 87bb220..9772623 100644 (file)
--- a/src/graph.c
+++ b/src/graph.c
@@ -13,11 +13,9 @@
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
-    You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
-    $Id$
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
 /* We need to generate two trees from the graph:
@@ -55,8 +53,10 @@
 #include "netutl.h"
 #include "node.h"
 #include "process.h"
+#include "protocol.h"
 #include "subnet.h"
 #include "utils.h"
+#include "xalloc.h"
 
 static bool graph_changed = true;
 
@@ -65,8 +65,7 @@ static bool graph_changed = true;
    Please note that sorting on weight is already done by add_edge().
 */
 
-void mst_kruskal(void)
-{
+void mst_kruskal(void) {
        avl_node_t *node, *next;
        edge_t *e;
        node_t *n;
@@ -75,8 +74,6 @@ void mst_kruskal(void)
        int safe_edges = 0;
        bool skipped;
 
-       cp();
-       
        /* Clear MST status on connections */
 
        for(node = connection_tree->head; node; node = node->next) {
@@ -149,8 +146,7 @@ void mst_kruskal(void)
    Running time: O(E)
 */
 
-void sssp_bfs(void)
-{
+void sssp_bfs(void) {
        avl_node_t *node, *next, *to;
        edge_t *e;
        node_t *n;
@@ -162,8 +158,6 @@ void sssp_bfs(void)
        char *envp[7];
        int i;
 
-       cp();
-
        todo_list = list_alloc(NULL);
 
        /* Clear visited status on nodes */
@@ -248,34 +242,39 @@ void sssp_bfs(void)
                        n->status.reachable = !n->status.reachable;
 
                        if(n->status.reachable) {
-                               ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Node %s (%s) became reachable"),
+                               ifdebug(TRAFFIC) logger(LOG_DEBUG, "Node %s (%s) became reachable",
                                           n->name, n->hostname);
                        } else {
-                               ifdebug(TRAFFIC) logger(LOG_DEBUG, _("Node %s (%s) became unreachable"),
+                               ifdebug(TRAFFIC) logger(LOG_DEBUG, "Node %s (%s) became unreachable",
                                           n->name, n->hostname);
                        }
 
                        /* TODO: only clear status.validkey if node is unreachable? */
 
                        n->status.validkey = false;
-                       n->status.waitingforkey = false;
+                       n->last_req_key = 0;
 
                        n->maxmtu = MTU;
                        n->minmtu = 0;
                        n->mtuprobes = 0;
 
-                       asprintf(&envp[0], "NETNAME=%s", netname ? : "");
-                       asprintf(&envp[1], "DEVICE=%s", device ? : "");
-                       asprintf(&envp[2], "INTERFACE=%s", iface ? : "");
-                       asprintf(&envp[3], "NODE=%s", n->name);
+                       if(n->mtuevent) {
+                               event_del(n->mtuevent);
+                               n->mtuevent = NULL;
+                       }
+
+                       xasprintf(&envp[0], "NETNAME=%s", netname ? : "");
+                       xasprintf(&envp[1], "DEVICE=%s", device ? : "");
+                       xasprintf(&envp[2], "INTERFACE=%s", iface ? : "");
+                       xasprintf(&envp[3], "NODE=%s", n->name);
                        sockaddr2str(&n->address, &address, &port);
-                       asprintf(&envp[4], "REMOTEADDRESS=%s", address);
-                       asprintf(&envp[5], "REMOTEPORT=%s", port);
+                       xasprintf(&envp[4], "REMOTEADDRESS=%s", address);
+                       xasprintf(&envp[5], "REMOTEPORT=%s", port);
                        envp[6] = NULL;
 
                        execute_script(n->status.reachable ? "host-up" : "host-down", envp);
 
-                       asprintf(&name,
+                       xasprintf(&name,
                                         n->status.reachable ? "hosts/%s-up" : "hosts/%s-down",
                                         n->name);
                        execute_script(name, envp);
@@ -288,12 +287,16 @@ void sssp_bfs(void)
                                free(envp[i]);
 
                        subnet_update(n, NULL, n->status.reachable);
+
+                       if(!n->status.reachable)
+                               update_node_udp(n, NULL);
+                       else if(n->connection)
+                               send_ans_key(n);
                }
        }
 }
 
-void graph(void)
-{
+void graph(void) {
        subnet_cache_flush();
        sssp_bfs();
        mst_kruskal();
@@ -308,8 +311,7 @@ void graph(void)
    dot -Tpng graph_filename -o image_filename.png -Gconcentrate=true
 */
 
-void dump_graph(void)
-{
+void dump_graph(void) {
        avl_node_t *node;
        node_t *n;
        edge_t *e;
@@ -326,7 +328,7 @@ void dump_graph(void)
        if(filename[0] == '|') {
                file = popen(filename + 1, "w");
        } else {
-               asprintf(&tmpname, "%s.new", filename);
+               xasprintf(&tmpname, "%s.new", filename);
                file = fopen(tmpname, "w");
        }