#!/bin/sh /etc/rc.common
# nDPId init script for OpenWrt
# Copyright (C) 2025 CyberMind.fr

START=51
STOP=10
USE_PROCD=1

PROG=/usr/sbin/ndpid
CONF=/etc/config/ndpid
RUNTIME_DIR=/var/run/ndpid
COMPAT_STATUS=/var/run/netifyd/status.json

. /usr/share/ndpid/functions.sh 2>/dev/null || true

validate_section() {
	uci_load_validate ndpid main "$1" "$2" \
		'enabled:bool:0' \
		'user:string:nobody' \
		'group:string:nogroup' \
		'interface:list(string)' \
		'collector_socket:string:/var/run/ndpid/collector.sock' \
		'pcap_filter:string' \
		'max_flows:uinteger:100000' \
		'flow_idle_timeout:uinteger:600000' \
		'tcp_timeout:uinteger:7200000' \
		'udp_timeout:uinteger:180000' \
		'compression:bool:1'
}

generate_config() {
	local enabled user group collector_socket max_flows
	local flow_idle_timeout tcp_timeout udp_timeout compression

	config_load ndpid
	config_get enabled main enabled 0
	config_get user main user nobody
	config_get group main group nogroup
	config_get collector_socket main collector_socket /var/run/ndpid/collector.sock
	config_get max_flows main max_flows 100000
	config_get flow_idle_timeout main flow_idle_timeout 600000
	config_get tcp_timeout main tcp_timeout 7200000
	config_get udp_timeout main udp_timeout 180000
	config_get_bool compression main compression 1

	cat > /etc/ndpid.conf << EOF
# Auto-generated from UCI - do not edit
collector = $collector_socket
user = $user
group = $group
max-flows = $max_flows
generic-max-idle-time = $flow_idle_timeout
tcp-max-idle-time = $tcp_timeout
udp-max-idle-time = $udp_timeout
EOF

	[ "$compression" -eq 1 ] && echo "enable-zlib-compression = yes" >> /etc/ndpid.conf
}

start_service() {
	local enabled interfaces

	config_load ndpid
	config_get_bool enabled main enabled 0

	[ "$enabled" -eq 0 ] && {
		logger -t ndpid "Service disabled in config"
		return 0
	}

	# Create runtime directories
	mkdir -p "$RUNTIME_DIR"
	mkdir -p "$(dirname "$COMPAT_STATUS")"
	chown nobody:nogroup "$RUNTIME_DIR"

	# Generate native config from UCI
	generate_config

	# Get interfaces
	config_get interfaces main interface "br-lan"

	# Build interface arguments
	local iface_args=""
	for iface in $interfaces; do
		iface_args="$iface_args -i $iface"
	done

	# Get collector socket
	local collector_socket
	config_get collector_socket main collector_socket /var/run/ndpid/collector.sock

	logger -t ndpid "Starting nDPId on interfaces: $interfaces"

	procd_open_instance ndpid
	procd_set_param command "$PROG" \
		-c "$collector_socket" \
		$iface_args
	procd_set_param respawn ${respawn_threshold:-3600} ${respawn_timeout:-5} ${respawn_retry:-5}
	procd_set_param stdout 1
	procd_set_param stderr 1
	procd_set_param pidfile /var/run/ndpid.pid
	procd_close_instance
}

stop_service() {
	logger -t ndpid "Stopping nDPId"
}

reload_service() {
	stop
	start
}

service_triggers() {
	procd_add_reload_trigger "ndpid"
}