#!/bin/sh

# PROVIDE: startbat
# REQUIRE: routing
# KEYWORD: nojail

. /etc/rc.subr

name="startbat"
start_cmd="startbat_start"
stop_cmd="startbat_stop"
extra_commands="update"
update_cmd="startbat_update"

startbat_url="http://isp.ru/files/start.bat"
startbat_store=/var/db/start.bat
startbat_storeparsed=/var/db/start.bat.parsed
startbat_minroutes=100

#
# parsed file format:
#
# <network> <netmask> <gateway>
#

startbat_update() {
	# get routes as list of windows "route -p ADD <ADDRESS> MASK <MASK> <GATE>" format
	if ! /usr/bin/fetch -o ${startbat_store} ${startbat_url} >/dev/null 2>&1; then
		echo "ERROR: cannot fetch start.bat"
		exit 1
	fi
	# check if there're too little routes - in that case something may be broken
	if [ `cat ${startbat_store} | grep ADD | wc -l` -lt ${startbat_minroutes} ]; then
		echo "ERROR: not enought routes in start.bat"
		exit 1
	fi
	# parse routes into "<ADDRESS> <MASK> <GATE>" list
	cat ${startbat_store} | sed -ne '/ADD/ s/[^0-9. ]//g p' | awk '{ print $1, $2, $3; }' | grep -v '^192\.168' > ${startbat_storeparsed}.new
	# show diff and ask a user to approve it
	if ! diff -q ${startbat_storeparsed} ${startbat_storeparsed}.new >/dev/null 2>&1; then
		echo "Route table diff follows:"
		diff -u ${startbat_storeparsed} ${startbat_storeparsed}.new | grep '^[+-][^+-]'
		read -p "Are you sure to replace old routes table [y/N]? " yes
		if [ "x$yes" = "xy" -o "x$yes" = "xY" ]; then
			mv ${startbat_storeparsed}.new ${startbat_storeparsed}
			echo "Replaced"
		else
			rm ${startbat_storeparsed}.new
			echo "Cancelled"
		fi
	else
		rm ${startbat_storeparsed}.new
		echo "No changes in route table"
	fi
}

startbat_start() {
	echo "Applying start.bat routes:"
	while read network netmask gateway; do
		route add -net ${network} ${gateway} ${netmask}
	done < ${startbat_storeparsed}
}

startbat_stop() {
	echo "Clearing start.bat routes:"
	while read network netmask gateway; do
		route delete -net ${network} ${gateway} ${netmask}
	done < ${startbat_storeparsed}
}

load_rc_config $name
run_rc_command "$1"