#!/bin/sh

. /lib/functions.sh
. /usr/share/libubox/jshn.sh
. /lib/functions/network.sh
. /lib/mwan3/mwan3.sh
. /lib/mwan3/common.sh

help()
{
	cat <<EOF
Syntax: mwan3 [command]

Available commands:
	start               Load iptables rules, ip rules and ip routes
	stop                Unload iptables rules, ip rules and ip routes
	restart             Reload iptables rules, ip rules and ip routes
	ifup <iface>        Load rules and routes for specific interface
	ifdown <iface>      Unload rules and routes for specific interface
	interfaces          Show interfaces status
	policies            Show currently active policy
	connected           Show directly connected networks
	rules               Show active rules
	status              Show all status
	use <iface> <cmd>   Run a command bound to <iface> and avoid mwan3 rules
EOF
}


ifdown() {
	if [ -z "$1" ]; then
		echo "Error: Expecting interface. Usage: mwan3 ifdown <interface>"
		exit 0
	fi

	if [ -n "$2" ]; then
		echo "Error: Too many arguments. Usage: mwan3 ifdown <interface>"
		exit 0
	fi

	mwan3_interface_hotplug_shutdown "$1" 1
}

ifup() {
	. /etc/init.d/mwan3

	if [ -z "$1" ]; then
		echo "Expecting interface. Usage: mwan3 ifup <interface>"
		exit 0
	fi

	if [ -n "$2" ]; then
		echo "Too many arguments. Usage: mwan3 ifup <interface>"
		exit 0
	fi

	mwan3_ifup "$1" "cmd"
}

interfaces()
{
	config_load mwan3

	echo "Interface status:"
	config_foreach mwan3_report_iface_status interface
	echo
}

policies()
{
	echo "Current ipv4 policies:"
	mwan3_report_policies_v4
	echo
	[ $NO_IPV6 -ne 0 ] && return
	echo "Current ipv6 policies:"
	mwan3_report_policies_v6
	echo
}

connected()
{
	echo "Directly connected ipv4 networks:"
	mwan3_report_connected_v4
	echo
	[ $NO_IPV6 -ne 0 ] && return
	echo "Directly connected ipv6 networks:"
	mwan3_report_connected_v6
	echo
}

rules()
{
	echo "Active ipv4 user rules:"
	mwan3_report_rules_v4
	echo
	[ $NO_IPV6 -ne 0 ] && return
	echo "Active ipv6 user rules:"
	mwan3_report_rules_v6
	echo
}

status()
{
	interfaces
	policies
	connected
	rules
}

start() {
	/etc/init.d/mwan3 enable
	/etc/init.d/mwan3 start
}

stop() {
	/etc/init.d/mwan3 disable
	/etc/init.d/mwan3 stop
}

restart() {
	/etc/init.d/mwan3 enable
	/etc/init.d/mwan3 stop
	/etc/init.d/mwan3 start
}

use() {
	# Run a command with the device, src_ip and fwmark set to avoid processing by mwan3
	# firewall rules

	local interface device src_ip family
	mwan3_init

	interface=$1 ; shift
	[ -z "$*" ] && echo "no command specified for mwan3 use" && return
	network_get_device device $interface
	[ -z "$device" ] && echo "could not find device for $interface" && return

	mwan3_get_src_ip src_ip $interface
	[ -z "$src_ip" ] && echo "could not find src_ip for $interface" && return

	config_get family $interface family
	[ -z "$family" ] && echo "could not find family for $interface. Using ipv4." && family='ipv4'

	echo "Running '$*' with DEVICE=$device SRCIP=$src_ip FWMARK=$MMX_DEFAULT FAMILY=$family"
	# shellcheck disable=SC2048
	FAMILY=$family DEVICE=$device SRCIP=$src_ip FWMARK=$MMX_DEFAULT LD_PRELOAD=/lib/mwan3/libwrap_mwan3_sockopt.so.1.0 $*

}

case "$1" in
	ifup|ifdown|interfaces|policies|connected|rules|status|start|stop|restart|use)
		mwan3_init
		# shellcheck disable=SC2048
		$*
	;;
	*)
		help
	;;
esac

exit 0