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#!/bin/bash

conf_file="/etc/ngrep-sip.conf"

# Default values.
interface=any
filter="port 5060"

### Read conf file.
if [ -f $conf_file ] ; then
	. $conf_file
else
	echo "Warning: Conf file $conf_file not found!"
fi

### Functions.
function show_help {
	echo -e "Read the manual:\n  man ngrep-sip"
}

### Set parameter 1 as match rule (or show help).
case $1 in

-h|--help )
	show_help
	exit 0
	;;

r )
	match="(^|CSeq:\s?\d* )(REGISTER)"
	;;

p )
	match="(^|CSeq:\s?\d* )(SUBSCRIBE|PUBLISH|NOTIFY)"
	;;

* )
	match=$1
	;;
	
esac

### Set the rest of parameters as filter.
shift
if [ $# -ge 1 ] ; then
	filter="$*"
fi

### Run ngrep command.
ngrep -d $interface -P "'" -W byline -T -i -t -q "$match" $filter