#!/bin/bash

# This script keeps the phone line open for up to 30 minutes, allowing a remote connection to be established to the tivo

SERVER_ADDRESS=194.1.151.205:80
LOGFILE="/var/log/keepalive.log"
patchref="keepalive"

# --------------------------------------------------------------------------------------------------

putlog()
{
  echo "$(date +%Y-%m-%d:%H:%M:%S): $patchref: $1" >>"$LOGFILE"
  echo "$(date +%Y-%m-%d:%H:%M:%S): $patchref: $1"
}

# function retrieves a file from the server library and puts it in /var/tmp

fetch()
{
  file=$1
  if [ ! -f "/var/tmp/$file" ]; then
    http_get -U http://$SERVER_ADDRESS/tivo-static/software/library/$file -D /var/tmp -T 0 -C 0
    chmod 755 "/var/tmp/$file"
  fi
}

# function to send a file to the server's file-post facility

post()
{
  filename=$1
  fileid=${2:-$1}
  http_post $filename http://$SERVER_ADDRESS/tivo-service/file-post.pl?$fileid OFF OFF ON >/dev/null
}  

# --------------------------------------------------------------------------------------------------

# figure out the IP address

cd /var/tmp
ifconfig ppp0 | grep inet >ip.txt
tivosh <<! >ipad.txt
set fd [open ip.txt r]
gets \$fd ipline
close \$fd
set iptok [lindex [split \$ipline ":"] 1]
set ipad  [lindex [split \$iptok " "] 0]
puts "\$ipad"
!
IP=$(cat ipad.txt)
rm -f ipad.txt ip.txt

# splash the IP address on the screen

fetch newtext2osd
/var/tmp/newtext2osd --gardavis -e --fg white3 --bg black1 -x 3 -y 0 -t ">> IP Address: $IP <<"

# start telnet and post a status report to the server

date >$LOGFILE
ifconfig >>$LOGFILE
/sbin/tnlited 23 /bin/bash -login >>$LOGFILE
echo "tnlited started" >>$LOGFILE
post $LOGFILE

# keep alive for up to 30 minutes, or until file /tmp/hangup.dat appears
#   - splash the IP address every 5 secs: tivo has a habit of refreshing the screen

timenow=$(date +%s)
timeout=$((timenow+1800)) # 30 minutes

while [ ! -f /tmp/hangup.dat -a $timenow -lt $timeout ]; do
  sleep 5
  /var/tmp/newtext2osd --gardavis -e --fg white3 --bg black1 -x 3 -y 0 -t ">> IP Address: $IP <<"
  timenow=$(date +%s)
done
rm /tmp/hangup.dat

# post a closing down status report to the server

date >>$LOGFILE

post $LOGFILE "done$LOGFILE"