run-probe

#!/bin/sh

#
# A little naive probe script for RaspberryPI
# Written by Andrew Yourtchenko (ayourtch@gmail.com)
# public domain
#
#
# Save this file as "/usr/local/bin/run-probe"
# Add "/usr/local/bin/run-probe &" to your /etc/rc.local, before the "exit 0" line
# 
# also create the file /etc/probe-targets with the following content:
# (obviously replacing the doc addresses with real ones)
#
# PROBE_TARGET4=192.0.2.1
# PROBE_TARGET6=2001:db8::1
# 

. /etc/probe-targets

while true; do
   # send the clear screen sequence
   clear >/tmp/devtty0

   # hostname + current time
   echo $(hostname) === $(date) >>/tmp/devtty0

   # all of non-link-local IP addresses
   hostname -I >>/tmp/devtty0

   # errors on the ethernet interface
   ifconfig eth0 | grep errors >>/tmp/devtty0

   # link-local info with some surgery to remove uninteresting data
   sudo ethtool eth0 \
   | tail -n +15 \
   | egrep -v "Wake|Secure|Current mes|Trans|Auto|drv|MII" \
   | sed -e 's/                                  //' \
   | sed -e 's/Link partner advertised link modes:/Partner adv. modes:/' \
   >>/tmp/devtty0

   # show lldp/cdp neighbors that we see
   lldpcli show neighbors | grep -v -- '------' >>/tmp/devtty0 

   # flood-ping IPv4 default gateway and the probe host
   DEFGW4=$(/sbin/ip -4 route | awk '/default/ { print $3 }')
   if [ "x$DEFGW4" != "x" ]; then
     ping -w 1 -l 64 -c 1 -i 0.1 $DEFGW4 | grep -A 5 statistics \
     | sed -e "s/packet/pkt/" -e "s/transmitted/tx/" -e "s/received/rx/g" -e "s/rtt //g" \
     >> /tmp/devtty0
     ping -w 1 -l 64 -c 1 -i 0.1 $PROBE_TARGET4 | grep -A 5 statistics \
     | sed -e "s/packet/pkt/" -e "s/transmitted/tx/" -e "s/received/rx/g" -e "s/rtt //g" \
     >> /tmp/devtty0
   else
     echo "NO IPv4 DEFAULT GATEWAY" >>/tmp/devtty0
   fi

   # flood-ping IPv6 default gateway and the probe host
   DEFGW6=$(ip -6 route | awk '/default/ { printf "%s%%%s",$3,$5 }')
   if [ "x$DEFGW6" != "x" ]; then
     ping -w 1 -l 64 -c 1 -i 0.1 $DEFGW6 | grep -A 5 statistics \
     | sed -e "s/packet/pkt/" -e "s/transmitted/tx/" -e "s/received/rx/g" -e "s/rtt //g" \
     >> /tmp/devtty0
     ping -w 1 -l 64 -c 1 -i 0.1 $PROBE_TARGET6 | grep -A 5 statistics \
     | sed -e "s/packet/pkt/" -e "s/transmitted/tx/" -e "s/received/rx/g" -e "s/rtt //g" \
     >> /tmp/devtty0
   else
     echo "NO IPv6 DEFAULT GATEWAY" >>/tmp/devtty0
   fi

   # show the output to the user
   cat /tmp/devtty0 >/dev/tty0
   # wait a bit 
   sleep 1
done