- Small fixes to graph algorithms

- More control over tap device, ability to set interface name to something
  other than the netname.
- Export NETNAME, DEVICE and INTERFACE environment variables to scripts.

diff --git a/src/device.h b/src/device.h
index c2c28a1..05dcaaa 100644 (file)
--- a/src/device.h
+++ b/src/device.h
@@ -17,13 +17,15 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: device.h,v 1.1.2.3 2001/10/27 13:13:35 guus Exp $
+    $Id: device.h,v 1.1.2.4 2001/10/31 12:50:24 guus Exp $
 */
 
 #ifndef __TINC_DEVICE_H__
 #define __TINC_DEVICE_H__
 
 extern int device_fd;
+extern char *device;
+extern char *interface;
 
 extern int setup_device(void);
 extern void close_device(void);

diff --git a/src/graph.c b/src/graph.c
index 53cf6a9..aa1ec72 100644 (file)
--- a/src/graph.c
+++ b/src/graph.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: graph.c,v 1.1.2.4 2001/10/30 12:59:12 guus Exp $
+    $Id: graph.c,v 1.1.2.5 2001/10/31 12:50:24 guus Exp $
 */
 
 /* We need to generate two trees from the graph:
@@ -59,7 +59,7 @@
 
 void mst_kruskal(void)
 {
-  avl_node_t *node;
+  avl_node_t *node, *next;
   edge_t *e;
   node_t *n;
   connection_t *c;
@@ -90,9 +90,9 @@ void mst_kruskal(void)
 
   /* Add safe edges */
 
-  while(safe_edges < nodes - 1)
-  for(skipped = 0, node = edge_weight_tree->head; node; node = node->next)
+  for(skipped = 0, node = edge_weight_tree->head; node; node = next)
     {
+      next = node->next;
       e = (edge_t *)node->data;
 
       if(e->from->status.visited == e->to->status.visited)
@@ -109,7 +109,10 @@ void mst_kruskal(void)
       safe_edges++;
 
       if(skipped)
-        break;
+        {
+          next = edge_weight_tree->head;
+          continue;
+        }
     }
 }
 
@@ -117,7 +120,7 @@ void mst_kruskal(void)
    Running time: O(E)
 */
 
-void sssp_bfs(void)
+void sssp_bfs(int prune)
 {
   avl_node_t *node, *from, *next, *to;
   edge_t *e;
@@ -165,7 +168,7 @@ void sssp_bfs(void)
                 {
                   check->status.visited = 1;
                   check->nexthop = (n->nexthop == myself) ? check : n->nexthop;
-                  check->via = check; /* FIXME: only if !(e->options & INDIRECT), otherwise use n->via */
+                  check->via = (e->options & OPTION_INDIRECT || n->via != n) ? n->via : check;
                   node = avl_alloc_node();
                   node->data = check;
                   avl_insert_before(todo_tree, from, node);
@@ -177,4 +180,16 @@ void sssp_bfs(void)
     }
 
   avl_free_tree(todo_tree);
+  
+  /* Nodes we haven't visited are unreachable, prune them. */
+
+  if(prune)
+    for(node = node_tree->head; node; node = next)
+      {
+        next = node->next;
+        n = (node_t *)node->data;
+
+        if(n->status.visited == 0)
+          node_del(n);
+      }
 }

diff --git a/src/graph.h b/src/graph.h
index c69fc98..bd6cc3f 100644 (file)
--- a/src/graph.h
+++ b/src/graph.h
@@ -17,9 +17,8 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id: graph.h,v 1.1.2.1 2001/10/29 13:14:57 guus Exp $
+    $Id: graph.h,v 1.1.2.2 2001/10/31 12:50:24 guus Exp $
 */
 
 extern void mst_kruskal(void);
-extern void mst_prim(void);
-extern void sssp_bfs(void);
+extern void sssp_bfs(int);

diff --git a/src/linux/device.c b/src/linux/device.c
index 1cb4307..02d7a7a 100644 (file)
--- a/src/linux/device.c
+++ b/src/linux/device.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: device.c,v 1.1.2.3 2001/10/27 13:13:35 guus Exp $
+    $Id: device.c,v 1.1.2.4 2001/10/31 12:50:24 guus Exp $
 */
 
 #include "config.h"
@@ -55,7 +55,9 @@
 
 int device_fd = -1;
 int device_type;
-char *device_fname;
+char *device;
+char *interface;
+char ifrname[IFNAMSIZ];
 char *device_info;
 
 int device_total_in = 0;
@@ -71,13 +73,15 @@ int setup_device(void)
   struct ifreq ifr;
 
 cp
-  if(!get_config_string(lookup_config(config_tree, "Device"), &device_fname))
-    device_fname = DEFAULT_DEVICE;
+  if(!get_config_string(lookup_config(config_tree, "Device"), &device))
+    device = DEFAULT_DEVICE;
 
+  if(!get_config_string(lookup_config(config_tree, "Interface"), &interface))
+    interface = netname;
 cp
-  if((device_fd = open(device_fname, O_RDWR | O_NONBLOCK)) < 0)
+  if((device_fd = open(device, O_RDWR | O_NONBLOCK)) < 0)
     {
-      syslog(LOG_ERR, _("Could not open %s: %m"), device_fname);
+      syslog(LOG_ERR, _("Could not open %s: %m"), device);
       return -1;
     }
 cp
@@ -97,20 +101,24 @@ cp
   memset(&ifr, 0, sizeof(ifr));
 cp
   ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
-  if (netname)
-    strncpy(ifr.ifr_name, netname, IFNAMSIZ);
+  if (interface)
+    strncpy(ifr.ifr_name, interface, IFNAMSIZ);
 cp
   if (!ioctl(device_fd, TUNSETIFF, (void *) &ifr))
   {
-      device_info = _("Linux tun/tap device");
+    device_info = _("Linux tun/tap device");
     device_type = DEVICE_TYPE_TUNTAP;
+    strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
+    interface = ifrname;
   }
   else
     if (!ioctl(device_fd, (('T'<< 8) | 202), (void *) &ifr))
     {
-      syslog(LOG_WARNING, _("Old ioctl() request was needed for %s"), device_fname);
+      syslog(LOG_WARNING, _("Old ioctl() request was needed for %s"), device);
       device_type = DEVICE_TYPE_TUNTAP;
       device_info = _("Linux tun/tap device");
+      strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);
+      interface = ifrname;
     }
     else
 #endif
@@ -119,7 +127,7 @@ cp
       device_type = DEVICE_TYPE_ETHERTAP;
     }
 
-  syslog(LOG_INFO, _("%s is a %s"), device_fname, device_info);
+  syslog(LOG_INFO, _("%s is a %s"), device, device_info);
 cp
   return 0;
 }
@@ -142,7 +150,7 @@ cp
     {
       if((lenin = read(device_fd, packet->data, MTU)) <= 0)
         {
-          syslog(LOG_ERR, _("Error while reading from %s %s: %m"), device_info, device_fname);
+          syslog(LOG_ERR, _("Error while reading from %s %s: %m"), device_info, device);
           return -1;
         }
 
@@ -154,7 +162,7 @@ cp
 
       if((lenin = readv(device_fd, vector, 2)) <= 0)
         {
-          syslog(LOG_ERR, _("Error while reading from %s %s: %m"), device_info, device_fname);
+          syslog(LOG_ERR, _("Error while reading from %s %s: %m"), device_info, device);
           return -1;
         }
 
@@ -183,7 +191,7 @@ cp
     {
       if(write(device_fd, packet->data, packet->len) < 0)
         {
-          syslog(LOG_ERR, _("Can't write to %s %s: %m"), device_info, device_fname);
+          syslog(LOG_ERR, _("Can't write to %s %s: %m"), device_info, device);
           return -1;
         }
     }
@@ -193,7 +201,7 @@ cp
 
       if(writev(device_fd, vector, 2) < 0)
         {
-          syslog(LOG_ERR, _("Can't write to %s %s: %m"), device_info, device_fname);
+          syslog(LOG_ERR, _("Can't write to %s %s: %m"), device_info, device);
           return -1;
         }
     }
@@ -206,7 +214,7 @@ cp
 void dump_device_stats(void)
 {
 cp
-  syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device_fname);
+  syslog(LOG_DEBUG, _("Statistics for %s %s:"), device_info, device);
   syslog(LOG_DEBUG, _(" total bytes in:  %10d"), device_total_in);
   syslog(LOG_DEBUG, _(" total bytes out: %10d"), device_total_out);
 cp

diff --git a/src/net.c b/src/net.c
index 1895bc1..230f2ba 100644 (file)
--- 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 1.35.4.143 2001/10/30 16:34:32 guus Exp $
+    $Id: net.c,v 1.35.4.144 2001/10/31 12:50:24 guus Exp $
 */
 
 #include "config.h"
@@ -975,7 +975,8 @@ cp
   /* Deactivate */
 
   c->status.active = 0;
-  c->node->connection = NULL;
+  if(c->node)
+    c->node->connection = NULL;
   do_prune = 1;
 cp
 }

diff --git a/src/node.c b/src/node.c
index 95a1d4f..9a51838 100644 (file)
--- a/src/node.c
+++ b/src/node.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: node.c,v 1.1.2.5 2001/10/30 12:59:12 guus Exp $
+    $Id: node.c,v 1.1.2.6 2001/10/31 12:50:24 guus Exp $
 */
 
 #include "config.h"
@@ -109,6 +109,23 @@ cp
 
 void node_del(node_t *n)
 {
+  avl_node_t *node, *next;
+  edge_t *e;
+  subnet_t *s;
+cp
+  for(node = n->subnet_tree->head; node; node = next)
+    {
+      next = node->next;
+      s = (subnet_t *)node->data;
+      subnet_del(n, s);
+    }
+
+  for(node = n->subnet_tree->head; node; node = next)
+    {
+      next = node->next;
+      e = (edge_t *)node->data;
+      edge_del(e);
+    }
 cp
   avl_delete(node_tree, n);
   avl_delete(node_udp_tree, n);

diff --git a/src/process.c b/src/process.c
index 525836b..7373a70 100644 (file)
--- a/src/process.c
+++ b/src/process.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: process.c,v 1.1.2.29 2001/10/28 10:16:18 guus Exp $
+    $Id: process.c,v 1.1.2.30 2001/10/31 12:50:24 guus Exp $
 */
 
 #include "config.h"
@@ -44,6 +44,7 @@
 #include "subnet.h"
 #include "device.h"
 #include "connection.h"
+#include "device.h"
 
 #include "system.h"
 
@@ -199,17 +200,29 @@ void _execute_script(const char *name)
   char *scriptname;
   char *s;
 cp
+#ifdef HAVE_UNSETENV
+  unsetenv("NETNAME");
+  unsetenv("DEVICE");
+  unsetenv("INTERFACE");
+#endif
+
   if(netname)
     {
       asprintf(&s, "NETNAME=%s", netname);
       putenv(s);       /* Don't free s! see man 3 putenv */
     }
-#ifdef HAVE_UNSETENV
-  else
+
+  if(device)
     {
-      unsetenv("NETNAME");
+      asprintf(&s, "DEVICE=%s", device);
+      putenv(s);       /* Don't free s! see man 3 putenv */
+    }
+
+  if(interface)
+    {
+      asprintf(&s, "INTERFACE=%s", interface);
+      putenv(s);       /* Don't free s! see man 3 putenv */
     }
-#endif
 
   chdir("/");
   

diff --git a/src/protocol.c b/src/protocol.c
index c8c41d9..7540e47 100644 (file)
--- a/src/protocol.c
+++ b/src/protocol.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: protocol.c,v 1.28.4.114 2001/10/30 16:34:32 guus Exp $
+    $Id: protocol.c,v 1.28.4.115 2001/10/31 12:50:24 guus Exp $
 */
 
 #include "config.h"
@@ -682,7 +682,7 @@ cp
   /* Run MST and SSSP algorithms */
   
   mst_kruskal();
-  sssp_bfs();
+  sssp_bfs(0);
 cp
   return 0;
 }
@@ -912,12 +912,11 @@ cp
 int del_node_h(connection_t *c)
 {
   node_t *n;
-  edge_t *e;
   char name[MAX_STRING_SIZE];
   ipv4_t address;
   port_t port;
   connection_t *other;
-  avl_node_t *node, *next;
+  avl_node_t *node;
 cp
   if(sscanf(c->buffer, "%*d "MAX_STRING" %lx:%hd", name, &address, &port) != 3)
     {
@@ -969,21 +968,12 @@ cp
         send_del_node(other, n);
     }
 
-  /* Delete all edges associated with the node */
-
-  for(node = n->edge_tree->head; node; node = next)
-    {
-      next = node->next;
-      e = (edge_t *)node->data;
-      edge_del(e);
-    }
-
   /* Delete the node */
   
   node_del(n);
 
   mst_kruskal();
-  sssp_bfs();
+  sssp_bfs(0);
 cp
   return 0;
 }
@@ -1082,7 +1072,7 @@ cp
   /* Run MST before or after we tell the rest? */
 
   mst_kruskal();
-  sssp_bfs();
+  sssp_bfs(0);
 cp
   return 0;
 }
@@ -1178,7 +1168,7 @@ cp
   /* Run MST before or after we tell the rest? */
 
   mst_kruskal();
-  sssp_bfs();
+  sssp_bfs(1);
 cp
   return 0;
 }