#!/bin/bash
# who_is script by Kyle Yoksh, K0KN 7/2013,
# last revised 1/16/2021
#
# This script should be owned by a user -  NOT ROOT!
#
# This script will resolve an Allstar node number, and will send output
# to screen or email. 
#
# Usage = who_is [node #] [ e ] e = email output
# 
# CHANGE THESE VARIABLES ONLY
# ---------------------------
SENDTO="TARGET EMAIL ADDRESS"
SENDAS="SENDING EMAIL ADDRESS"
PRIVATE_LIST="/home/kyle/private_nodelist"
#
# YOU SHOULD NOT NEED TO EDIT THESE VARIABLES
# -------------------------------------------
SUBJECT="who_is"
LOGFILE="/var/log/asterisk/connectlog"
LISTURL=http://stats.allstarlink.org/api/stats/mapData
NODELIST="/dev/shm/allstar_nodelist"
WHOISEMAIL="/dev/shm/whois_email.tmp"
ALLSTARRPTEXTNODES="/var/lib/asterisk/rpt_extnodes"
#

# Flush variables
retrycount=0
url=""
name=""
COUNT=""
NODENO=""

if [ "$1" == "" ] ; then
echo "Usage = who_is [node #] [ e ]" ; exit
fi

echo

downloadnodelist ()
{
# Create / update local nodelist
retrycount=$((retrycount + 1))
if [ $retrycount == 10 ] ; then
echo $(date) "Error downloading nodelist - who_is" >> $LOGFILE ; echo "Error downloading nodelist -- exiting" ; exit ; fi
if ! [ -f $NODELIST ] ; then
echo "No nodelist found - downloading" ; wget -O "$NODELIST"2 $LISTURL ; appendprivate ; fi

if [ "$(( $(date +"%s") - $(stat -c "%Y" $NODELIST) ))" -gt "3600" ] ; then
echo "Nodelist over 1 hour old - downloading new" ; wget -O "$NODELIST"2 $LISTURL ; appendprivate ; fi
}

appendprivate ()
{
# Remove lat/long fields
cut -f1,2,5,6 "$NODELIST"2 > $NODELIST
# Append private nodelist to Allstar nodelist if file exists
if [ -s "$PRIVATE_LIST" ] ; then
grep -v '^$' "$PRIVATE_LIST" > "$PRIVATE_LIST"2
cp -f "$PRIVATE_LIST"2 "$PRIVATE_LIST"
rm -f "$PRIVATE_LIST"2
echo "Private nodelist found. Adding entries from $PRIVATE_LIST to $NODELIST"
cat "$PRIVATE_LIST" >> "$NODELIST"
echo
fi
}

# Delete nodelist if zero bytes
if ! [ -s $NODELIST ] ; then rm -f $NODELIST ; fi

# Run Check/download nodelist routine
downloadnodelist

#############################

if ! [ "$2" == "e" -o "$2" == "E" ] ; then
WHOISOUTPUT="Output to screen only"
   else
WHOISOUTPUT="Sent output via email/text message"
fi

# Extract IP address from Allstar nodelist
if [ -s "$ALLSTARRPTEXTNODES" ] ; then
grep -F "$1=radio" "$ALLSTARRPTEXTNODES" > "$NODELIST"3
ALLSTARNODEIP=$(cut -f2 -d"," "$NODELIST"3)
fi

# Count number of digits for remote station
COUNT=$(echo $1 | wc -m)
COUNT=$(( $COUNT - 1 ))
#
if [ "$COUNT" == 3 ] ; then
ALLSTARNODEIP=""
fi

# Random sleep time in case multiple nodes run script at same time
# uncomment if having timing issues with multiple nodes on same box
# sleep $[ ( $RANDOM % 5 ) +1]s

ASNODE=$(grep -w ^$1 $NODELIST)
# ASNODE=$(grep ^$1 $NODELIST)

# Output to screen only

if [ -z "$ASNODE" ] ; then
ASNODE="Node $1 not found in nodelist"
fi

echo "$ASNODE $ALLSTARNODEIP"

echo "$ASNODE $ALLSTARNODEIP" > "$WHOISEMAIL"

# Add entry to log
echo $(date) "who_is $1 - " $ASNODE $ALLSTARNODEIP $WHOISOUTPUT >> $LOGFILE

#
if ! [ "$2" == "e" -o "$2" == "E" ] ; then
echo
exit
fi

# Email output

echo "Sending output via email/text message"

mail -s "$SUBJECT" -a "From: $SENDAS <$SENDAS>" "$SENDTO" < $WHOISEMAIL

# Done!
rm -f "$NODELIST"2
rm -f "$NODELIST"3
exit 0