#!/bin/sh
# Niels Elgaard Larsen, licence:GPL
# - No STUN
# - Missing a "tag"

# Register and display INVITE and other packages.
port=5170
nreq=42
gw=gw1.musimi.dk
#gw=musimi.dk # New Nusimi
phoneno=369xxxxx
user=$phoneno  ## Apparently always the phone no.
realm=musimi.dk
pw=yourPassword
username="ElgaardBot User"
thishost=213.xxx.yyy.zzz # Your external IP
#==END of CONFIGURATION ===============
hn=$(hostname -i|cut -d " " --fields=1)
branch=z9hG4bK77$RANDOM$(date "+%s")
cid=$RANDOM@$thishost
function register()
{
echo "REGISTER sip:$gw SIP/2.0"
echo "Via: SIP/2.0/UDP $thishost:$port;branch=$branch"
echo "Request-URI:sip:musimi.dk"
echo "From: \"$username\" <sip:$phoneno@$gw;user=phone>"
echo "To:  \"$username\" <sip:$phoneno@$gw;user=phone>"
echo "Contact: \"$username\" <sip:$phoneno@$gw:$port;user=phone>"
echo "User-Agent: elgaardBot/0.1"
if [ x$1 != x ] 
then
printf 'Authorization: Digest username="%s", realm="musimi.dk", nonce="%s", uri="sip:%s", cnonce="abcdefghi", nc="00000001", response="%s", opaque=""\n' $user $2 $gw $1
fi
echo "Expires: 3600"
echo "Call-ID:$cid"
echo "Content-Length: 0"
echo "CSeq:$nreq REGISTER"
echo "Event: registration"
echo "Allow-Events: presence"
echo "Allow: INVITE,NOTIFY,MESSAGE,INFO,SUBSCRIBE,OPTIONS,BYE,CANCEL,NOTIFY,ACK,REFER"
}
nonce=$(register |  nc -q 5 -u -p $port  $gw 5060 | grep -i WWW-Authenticate:| cut -d\" -f4 )
A1=$(echo -n "$user":"$realm":"$pw"|openssl md5)
A2=$(echo -n "REGISTER":"sip:$gw"|openssl md5)
res=$(echo -n  "$A1":"$nonce":"$A2"|openssl md5)
let "nreq=nreq+1"
register $res $nonce | nc -q 5 -u -p $port $gw 5060
nc -l -u -p $port