openwrt/package/firewall/files/lib/core_rule.sh

# Copyright (C) 2009-2010 OpenWrt.org

fw_config_get_rule() {
	[ "${rule_NAME}" != "$1" ] || return
	fw_config_get_section "$1" rule { \
		string _name "$1" \
		string name "" \
		string src "" \
		ipaddr src_ip "" \
		string src_mac "" \
		string src_port "" \
		string dest "" \
		ipaddr dest_ip "" \
		string dest_mac "" \
		string dest_port "" \
		string icmp_type "" \
		string proto "tcpudp" \
		string target "" \
		string family "" \
	} || return
	[ -n "$rule_name" ] || rule_name=$rule__name
	[ "$rule_proto" == "icmp" ] || rule_icmp_type=
}

fw_load_rule() {
	fw_config_get_rule "$1"

	fw_callback pre rule

	rule_src_port=$(fw_get_port_range $rule_src_port)
	rule_dest_port=$(fw_get_port_range $rule_dest_port)

	local chain=input
	[ -n "$rule_src" ] && {
		[ -z "$rule_dest" ] && {
			chain=zone_${rule_src}
		} || {
			chain=zone_${rule_src}_forward
		}
	}

	local target=$rule_target
	[ -z "$target" ] && {
		target=REJECT
	}
	[ -n "$dest" ] && {
		target=zone_${rule_dest}_${target}
	}

	local mode=$(fw_get_family_mode ${rule_family:-x} $rule_src I)

	local rule_pos
	eval 'rule_pos=$((++FW__RULE_COUNT_'$mode'_'$chain'))'

	[ "$rule_proto" == "tcpudp" ] && rule_proto="tcp udp"
	for rule_proto in $rule_proto; do
		fw add $mode f $chain $target $rule_pos { $rule_src_ip $rule_dest_ip } { \
			${rule_proto:+-p $rule_proto} \
			${rule_src_ip:+-s $rule_src_ip} \
			${rule_src_port:+--sport $rule_src_port} \
			${rule_src_mac:+-m mac --mac-source $rule_src_mac} \
			${rule_dest_ip:+-d $rule_dest_ip} \
			${rule_dest_port:+--dport $rule_dest_port} \
			${rule_icmp_type:+--icmp-type $rule_icmp_type} \
		}
	done

	fw_callback post rule
}