startax25_dw

#!/bin/bash
# Script for connecting my Local Digipeater DB0HFT running Xnet
#
# after connecting DB0HFT with axcall i can get my Hamnet IP
# with command 'getip'
#
# Change MY_CALL below to your Callsign, same as in axports
# Change MY_IP to the IP you got from the Digipeater
        
MY_CALL=MYCALL-1
MY_IP=44.149.140.55
DW_CFG=/etc/ax25/direwolf.conf

case "$1" in
start)
  echo "Starting Direwolf"
  direwolf -t 0 -c ${DW_CFG} -p &
  #Check if Direwolf is running
  sleep 5
  if [ -z "`ps ax | grep -v grep | grep direwolf`" ]; then
    echo -e "\nERROR: Direwolf was not started"
    exit 1
  fi

  echo "Adding KISS Connection on PTY port /tmp/kisstnc"
  mkiss -s 19200 -x 1 /tmp/kisstnc > /tmp/unix98
  #This creates a PTS interface like "/dev/pts/3"
  export PTS0=`more /tmp/unix98 | grep -w /dev | cut -b -11`
  echo "PTS0 device: $PTS0"
  kissattach $PTS0 ax0 > /tmp/ax25-config.tmp
  awk '/device/ { print $7 }' /tmp/ax25-config.tmp > /tmp/ax25-config1-tmp
  read Device < /tmp/ax25-config1-tmp

  #/bin/echo 1 >/proc/sys/net/ax25/ax0/ip_default_mode
  #kissparms -p DJ1AN-1 -t 300 -l 30 -s 20 -r 80 -f n

  # experimental Parameters, maybe only for direct Links?
  #echo 7 >/proc/sys/net/ax25/ax0/standard_window_size
  #echo 100 >/proc/sys/net/ax25/ax0/t1_timeout
  #echo 30 >/proc/sys/net/ax25/ax0/t2_timeout
  #echo 30000 >/proc/sys/net/ax25/ax0/t3_timeout
  #echo 30 >/proc/sys/net/ax25/ax0/maximum_retry_count
  
  # https://thomask.sdf.org/blog/2017/08/06/improving-arp-performance-on-slow-ax-25-links.html
  #echo 5000 > /proc/sys/net/ipv4/neigh/ax0/retrans_time_ms
  #echo 1200000 > /proc/sys/net/ipv4/neigh/ax0/base_reachable_time_ms
  
  axparms -route add ax0 db0hft -ipmode vc
  axparms --setcall ax0 ${MY_CALL}
  ip address add ${MY_IP}/32 dev ax0
  
  arp -H ax25 -i ax0 -s 44.149.140.50 db0hft
  
  ip route add 44.149.140.50 dev ax0
  ip route add 44.130.0.0/16 via 44.149.140.50
  ip route add 44.148.0.0/15 via 44.149.140.50
  ip route add 44.224.0.0/15 via 44.149.140.50
    
  #Blocks outgoing Multicast on AX Device
  iptables -A OUTPUT -s ${MY_IP}/32 -d 224.0.0.0/4 -j REJECT
;;

stop)
  killall -TERM mkiss
  killall -TERM kissattach
  killall -TERM direwolf
  arp -d 44.149.140.50
  iptables -D OUTPUT -s ${MY_IP}/32 -d 224.0.0.0/4 -j REJECT
exit 0
;;

*)
echo "Usage: startax25_dw {start|stop}"
exit 0
;;

esac
exit 0