diff --git a/platform/netsim/display.c b/platform/netsim/display.c
index ce88bd593..bc86f7cdc 100644
--- a/platform/netsim/display.c
+++ b/platform/netsim/display.c
@@ -24,7 +24,7 @@
  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  * OF SUCH DAMAGE.
  *
- * $Id: display.c,v 1.8 2008/02/03 20:49:50 adamdunkels Exp $
+ * $Id: display.c,v 1.9 2008/05/14 19:22:57 adamdunkels Exp $
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
@@ -41,6 +41,7 @@
 
 #include <gtk/gtk.h>
 
+#include <sys/time.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
@@ -59,12 +60,15 @@ static GdkFont *font;
 
 #define MARK_SIZE 8
 
+#define RADIO_SIZE 20
+
 #define DOT_SIZE ether_strength()
 #define DOT_INTENSITY 3
 
 struct dot {
   struct dot *next;
   int x, y;
+  int destx, desty;
   int size;
   int intensity;
 };
@@ -222,6 +226,17 @@ display_redraw(void)
 			   4, 4);
       }
 
+      if(n->radio_status) {
+	gdk_draw_arc(pixmap,
+		     green,
+		     FALSE,
+		     x * SCALE - RADIO_SIZE * SCALE,
+		     y * SCALE - RADIO_SIZE * SCALE,
+		     RADIO_SIZE * 2 * SCALE, RADIO_SIZE * 2 * SCALE,
+		     0, 360 * 64);
+      }
+
+
     }
 
   }
@@ -351,6 +366,9 @@ key_press_event (GtkWidget * widget, GdkEventKey * event)
     gtk_exit(0);
     /*   exit(0);*/
   }
+  if(event->keyval == 'p') {
+    display_output_fig();
+  }
   return TRUE;
 }
 
@@ -661,3 +679,59 @@ display_run(void)
   gtk_main();
 }
 /*-----------------------------------------------------------------------------------*/
+void
+display_output_fig(void)
+{
+  int i;
+  struct nodes_node *n;
+  int x, y;
+  int dot_radius = 75;
+  int scale = 50;
+  FILE *fp;
+  char name[40];
+  struct timeval tv;
+
+  gettimeofday(&tv, NULL);
+  snprintf(name, sizeof(name), "network-%lu.fig", tv.tv_sec);
+  
+  fp = fopen(name, "w");
+  fprintf(fp, "#FIG 3.2\n"
+	 "Landscape\n"
+	 "Center\n"
+	 "Inches\n"
+	 "Letter\n"
+	 "100.00\n"
+	 "Single\n"
+	 "-2\n"
+	 "1200 2\n"
+	 );
+
+  for(i = 0; i < nodes_num(); ++i) {
+    n = nodes_node(i);
+    x = n->x * scale;
+    y = n->y * scale;
+
+    fprintf(fp, "1 3 1 1 0 7 50 -1 0 4.000 1 0.0000 %d %d %d %d %d %d %d %d\n",
+	   x, y,
+	   dot_radius, dot_radius,
+	   x, y,
+	   x + dot_radius, y + dot_radius);
+
+    if(strlen(n->text) > 0) {
+      fprintf(fp, "4 0 0 50 -1 16 18 0.0000 4 135 720 %d %d %s\\001\n",
+	      x + 2 * scale, y, n->text);
+    }
+
+    if(n->linex != 0 && n->liney != 0) {
+      fprintf(fp, "2 1 1 1 0 7 50 -1 -1 0.000 0 0 -1 0 1 2\n"
+	      "1 1 4.00 60.00 120.00\n"
+	      "%d %d %d %d\n",
+	      x, y,
+	      n->linex * scale, n->liney * scale);
+    }
+
+  }
+
+  fclose(fp);
+}
+/*-----------------------------------------------------------------------------------*/
diff --git a/platform/netsim/display.h b/platform/netsim/display.h
index 1e57a1edd..5eb8f797f 100644
--- a/platform/netsim/display.h
+++ b/platform/netsim/display.h
@@ -1,8 +1,8 @@
 /*
  * Copyright (c) 2004 Swedish Institute of Computer Science.
- * All rights reserved. 
- * 
- * Redistribution and use in source and binary forms, with or without modification, 
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright notice,
@@ -11,20 +11,20 @@
  *    this list of conditions and the following disclaimer in the documentation
  *    and/or other materials provided with the distribution.
  * 3. The name of the author may not be used to endorse or promote products
- *    derived from this software without specific prior written permission. 
+ *    derived from this software without specific prior written permission.
  *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
- * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
- * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  * OF SUCH DAMAGE.
  *
- * $Id: display.h,v 1.1 2006/06/17 22:41:35 adamdunkels Exp $
+ * $Id: display.h,v 1.2 2008/05/14 19:22:57 adamdunkels Exp $
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
@@ -39,9 +39,6 @@ void display_run(void);
 
 void display_tick(void);
 
+void display_output_fig(void);
+
 #endif /* __DISPLAY_H__ */
-
-
-
-
-
diff --git a/platform/netsim/ether.c b/platform/netsim/ether.c
index ea8ecd83b..034f1bdd7 100644
--- a/platform/netsim/ether.c
+++ b/platform/netsim/ether.c
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: ether.c,v 1.12 2008/02/03 20:49:50 adamdunkels Exp $
+ * $Id: ether.c,v 1.13 2008/05/14 19:22:58 adamdunkels Exp $
  */
 /**
  * \file
@@ -94,6 +94,7 @@ static int s, sc;
 #define PTYPE_TEXT   5
 #define PTYPE_DONE   6
 #define PTYPE_SERIAL 7
+#define PTYPE_RADIO_STATUS 8
 
 #define SERIAL_LEN 80
 
@@ -108,6 +109,7 @@ struct ether_hdr {
   int srcid;
   int srcnodetype;
   int leds;
+  int radio_status;
   char text[NODES_TEXTLEN + SERIAL_LEN];
 };
 
@@ -359,6 +361,9 @@ ether_server_poll(void)
 	break;
       case PTYPE_SERIAL:
 	break;
+      case PTYPE_RADIO_STATUS:
+	nodes_set_radio_status(hdr->srcx, hdr->srcy, hdr->radio_status);
+	break;
       }
     }
     /*    tv.tv_sec = 0;
@@ -586,6 +591,23 @@ ether_set_text(char *text)
 
   node_send_packet((char *)&hdr, sizeof(struct ether_hdr));
 
+}
+/*-----------------------------------------------------------------------------------*/
+void
+ether_set_radio_status(int onoroff)
+{
+  struct ether_hdr hdr;
+  
+  hdr.srcx = node.x;
+  hdr.srcy = node.y;
+  hdr.type = PTYPE_RADIO_STATUS;
+  hdr.radio_status = onoroff;
+  hdr.srcid = node.id;
+  hdr.linex = linex;
+  hdr.liney = liney;
+
+  node_send_packet((char *)&hdr, sizeof(struct ether_hdr));
+
 }
 /*-----------------------------------------------------------------------------------*/
 void
diff --git a/platform/netsim/ether.h b/platform/netsim/ether.h
index cb42ab73f..23db87504 100644
--- a/platform/netsim/ether.h
+++ b/platform/netsim/ether.h
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: ether.h,v 1.8 2008/02/03 20:49:50 adamdunkels Exp $
+ * $Id: ether.h,v 1.9 2008/05/14 19:22:58 adamdunkels Exp $
  */
 #ifndef __ETHER_H__
 #define __ETHER_H__
@@ -43,6 +43,7 @@ struct ether_packet {
   char data[1500];
   int len;
   int x, y;
+  int destx, desty;
 };
 
 
@@ -51,6 +52,8 @@ void ether_send_done(void);
 u8_t ether_send(char *data, int len);
 void ether_set_leds(int leds);
 void ether_set_text(char *text);
+
+void ether_set_radio_status(int onoroff);
 void ether_send_serial(char *text);
 
 
diff --git a/platform/netsim/main.c b/platform/netsim/main.c
index 3bfd35a79..ffdc1f72b 100644
--- a/platform/netsim/main.c
+++ b/platform/netsim/main.c
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: main.c,v 1.11 2008/01/14 09:38:16 adamdunkels Exp $
+ * $Id: main.c,v 1.12 2008/05/14 19:22:58 adamdunkels Exp $
  */
 
 /**
@@ -177,7 +177,7 @@ main(int argc, char **argv)
     printf("usage: %s <ip addr of ethernet card to share> "
 	   "<ip addr of netsim gateway>\n", argv[0]);
     exit(1);
-  } else if(argc == 2) {
+  } else if(argc >= 2) {
     gwaddr = inet_addr(argv[2]);
   }
 #endif /* __CYGWIN__ */
diff --git a/platform/netsim/net/ethernode.c b/platform/netsim/net/ethernode.c
index 544b8cd01..2ee552849 100644
--- a/platform/netsim/net/ethernode.c
+++ b/platform/netsim/net/ethernode.c
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: ethernode.c,v 1.14 2008/01/14 09:38:16 adamdunkels Exp $
+ * $Id: ethernode.c,v 1.15 2008/05/14 19:22:58 adamdunkels Exp $
  */
 /**
  * \file
@@ -75,8 +75,20 @@ struct hdr {
   u8_t seqno;
 };
 
-static int ethernode_on(void) {return 0;}
-static int ethernode_safe_off(void) {return 0;}
+static int radio_is_on = 1;
+
+static int
+ethernode_on(void)
+{
+  radio_is_on = 1;
+  ether_set_radio_status(radio_is_on);
+}
+static int
+ethernode_safe_off(void)
+{
+  radio_is_on = 0;
+  ether_set_radio_status(radio_is_on);
+}
 
 #include "net/ethernode.h"
 
@@ -157,7 +169,11 @@ ethernode_read(void *buf, unsigned short bufsize)
   if(len == 0) {
     return 0;
   }
-  
+
+  if(radio_is_on == 0) {
+    /* Drop the incoming packet if the simulated radio is switched off. */
+    return 0;
+  }
   /*  printf("ethernode_poll: received data packet with len %d type %d\n", len, hdr->type);*/
 
   switch(hdr->type) {
diff --git a/platform/netsim/nodes.c b/platform/netsim/nodes.c
index d27bf471a..385fa6827 100644
--- a/platform/netsim/nodes.c
+++ b/platform/netsim/nodes.c
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: nodes.c,v 1.7 2008/02/03 20:49:50 adamdunkels Exp $
+ * $Id: nodes.c,v 1.8 2008/05/14 19:22:58 adamdunkels Exp $
  */
 #include <signal.h>
 #include <stdio.h>
@@ -90,44 +90,45 @@ nodes_node(int num)
   return &nodes[num];
 }
 /*---------------------------------------------------------------------------*/
-void
-nodes_set_leds(int x, int y, int leds)
+static struct nodes_node *
+find_node(int x, int y)
 {
   int i;
 
   for(i = numnodes; i >= 0; --i) {
     if(nodes[i].x == x && nodes[i].y == y) {
-      nodes[i].leds = leds;
-      return;
+      return &nodes[i];
     }
   }
+  return &nodes[0];
+}
+/*---------------------------------------------------------------------------*/
+void
+nodes_set_leds(int x, int y, int leds)
+{
+  find_node(x, y)->leds = leds;
 }
 /*---------------------------------------------------------------------------*/
 void
 nodes_set_text(int x, int y, char *text)
 {
-  int i;
-
-  for(i = numnodes; i >= 0; --i) {
-    if(nodes[i].x == x && nodes[i].y == y) {
-      strncpy(nodes[i].text, text, NODES_TEXTLEN);
-      return;
-    }
-  }
+  strncpy(find_node(x, y)->text, text, NODES_TEXTLEN);
+}
+/*---------------------------------------------------------------------------*/
+void
+nodes_set_radio_status(int x, int y, int radio_status)
+{
+  find_node(x, y)->radio_status = radio_status;
 }
 /*---------------------------------------------------------------------------*/
 void
 nodes_set_line(int x, int y, int linex, int liney)
 {
-  int i;
+  struct nodes_node *n;
 
-  for(i = numnodes; i >= 0; --i) {
-    if(nodes[i].x == x && nodes[i].y == y) {
-      nodes[i].linex = linex;
-      nodes[i].liney = liney;
-      return;
-    }
-  }
+  n = find_node(x, y);
+  n->linex = linex;
+  n->liney = liney;
 }
 /*---------------------------------------------------------------------------*/
 struct nodes_node *
diff --git a/platform/netsim/nodes.h b/platform/netsim/nodes.h
index e272d472f..240a0a932 100644
--- a/platform/netsim/nodes.h
+++ b/platform/netsim/nodes.h
@@ -30,7 +30,7 @@
  *
  * Author: Adam Dunkels <adam@sics.se>
  *
- * $Id: nodes.h,v 1.5 2008/02/03 20:49:50 adamdunkels Exp $
+ * $Id: nodes.h,v 1.6 2008/05/14 19:22:58 adamdunkels Exp $
  */
 #ifndef __NODES_H__
 #define __NODES_H__
@@ -45,6 +45,7 @@ void nodes_kill(void);
 void nodes_set_leds(int x, int y, int leds);
 void nodes_set_text(int x, int y, char *text);
 void nodes_set_line(int x, int y, int linex, int liney);
+void nodes_set_radio_status(int x, int y, int radio_status);
 
 void nodes_done(int id);
 
@@ -60,6 +61,7 @@ struct nodes_node {
   int leds;
   int done;
   int linex, liney;
+  int radio_status;
   char text[NODES_TEXTLEN];
 };