--- panel-plugin/net.c.old	2005-09-19 00:22:41.378774360 +0200
+++ panel-plugin/net.c	2005-09-19 01:23:45.791698920 +0200
@@ -82,6 +82,8 @@
     
     data->ip_address[0] = 0;
     data->ip_update_count = 0;
+    data->up = FALSE;
+    data->up_update_count = 0;
     
     if (checkinterface(data) != TRUE)
 	{
@@ -168,6 +170,43 @@
 
 
 /* ---------------------------------------------------------------------------------------------- */
+int get_interface_up(netdata* data)
+{
+    int sockfd;
+    struct ifreq ifr;
+    struct sockaddr_in *p_sa;
+        
+    /* if the update count is non-zero */ 
+    if (data->up_update_count > 0)
+    {
+        data->up_update_count--;
+        return data->up;
+    }
+
+    /* get the value from the operating system */
+    if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
+    {
+        perror("Error in socket");
+        return FALSE;
+    }
+    
+    snprintf(ifr.ifr_name, IF_NAMESIZE, data->ifdata.if_name);
+    if (ioctl(sockfd, SIOCGIFFLAGS, &ifr) != 0)
+    {
+        close(sockfd);
+        perror("Error in ioctl(sockfd)");
+        return FALSE;
+    }
+    close(sockfd);
+
+    data->up = ((ifr.ifr_flags & IFF_UP) == IFF_UP) ? TRUE : FALSE;
+    data->up_update_count = UP_UPDATE_INTERVAL;
+
+    return data->up;
+}
+
+
+/* ---------------------------------------------------------------------------------------------- */
 char* get_ip_address(netdata* data)
 {
     int sockfd;
@@ -192,7 +231,7 @@
     if (ioctl(sockfd, SIOCGIFADDR, &ifr) != 0)
     {
         close(sockfd);
-        perror("Error in ictl(sockfd)");
+        perror("Error in ioctl(sockfd)");
         return NULL;
     }
     close(sockfd);
--- panel-plugin/net.h.old	2005-09-19 00:52:28.108150208 +0200
+++ panel-plugin/net.h	2005-09-19 01:07:51.793728656 +0200
@@ -22,6 +22,7 @@
 #include "slurm.h"
 
 #define MSGSIZE 1024
+#define UP_UPDATE_INTERVAL 20
 #define IP_UPDATE_INTERVAL 20
 #define IP_ADDRESS_LENGTH 64
 #define INTERFACE_NAME_LENGTH 9
@@ -59,6 +60,8 @@
     char            ip_address[IP_ADDRESS_LENGTH];
     int             ip_update_count;
     DataStats       stats;
+    int             up;
+    int             up_update_count;
 #ifdef __HPUX__
     int             wait_pcks_counter;
     nmapi_logstat*  if_ptr;
@@ -115,6 +118,14 @@
 char* get_name(netdata* data);
 
 /**
+ * Check to see if an interface is up.
+ * @param data      object
+ * @return  <code>true</code> if interface is up, <code>false</code> otherwise.
+ */
+int get_interface_up(netdata* data);
+
+
+/**
  * Returns the IP address of the network interface
  * @param data     object
  * @return the IP address as string, NULL on error.
--- panel-plugin/netload.c.old	2005-09-19 00:58:37.320021472 +0200
+++ panel-plugin/netload.c	2005-09-19 01:25:06.671403336 +0200
@@ -143,6 +143,18 @@
 
     XFCE_PANEL_LOCK();
 
+    if (!get_interface_up(&(global->monitor->data)))
+    {
+        g_snprintf(caption, sizeof(caption), 
+                _("<< %s >> (Interface down)"),
+                    get_name(&(global->monitor->data)));
+        gtk_tooltips_set_tip(tooltips, GTK_WIDGET(global->monitor->ebox), caption, NULL);
+
+        XFCE_PANEL_UNLOCK();
+
+        return TRUE;
+    }
+
     get_current_netload( &(global->monitor->data), &(net[IN]), &(net[OUT]), &(net[TOT]) );