package/firewall/files/lib/core_rule.sh

   1 # Copyright (C) 2009-2010 OpenWrt.org
   2
   3 fw_config_get_rule() {
   4         [ "${rule_NAME}" != "$1" ] || return
   5         fw_config_get_section "$1" rule { \
   6                 string _name "$1" \
   7                 string name "" \
   8                 string src "" \
   9                 ipaddr src_ip "" \
  10                 string src_mac "" \
  11                 string src_port "" \
  12                 string dest "" \
  13                 ipaddr dest_ip "" \
  14                 string dest_port "" \
  15                 string icmp_type "" \
  16                 string proto "tcpudp" \
  17                 string target "" \
  18                 string family "" \
  19         } || return
  20         [ -n "$rule_name" ] || rule_name=$rule__name
  21         [ "$rule_proto" == "icmp" ] || rule_icmp_type=
  22 }
  23
  24 fw_load_rule() {
  25         fw_config_get_rule "$1"
  26
  27         [ "$rule_target" != "NOTRACK" ] || [ -n "$rule_src" ] || {
  28                 fw_log error "NOTRACK rule ${rule_name}: needs src, skipping"
  29                 return 0
  30         }
  31
  32         fw_callback pre rule
  33
  34         fw_get_port_range rule_src_port $rule_src_port
  35         fw_get_port_range rule_dest_port $rule_dest_port
  36
  37         local table=f
  38         local chain=input
  39         local target="${rule_target:-REJECT}"
  40         if [ "$target" == "NOTRACK" ]; then
  41                 table=r
  42                 chain="zone_${rule_src}_notrack"
  43         else
  44                 [ -n "$rule_src" ] && chain="zone_${rule_src}${rule_dest:+_forward}"
  45                 [ -n "$rule_dest" ] && target="zone_${rule_dest}_${target}"
  46         fi
  47
  48         local mode
  49         fw_get_family_mode mode ${rule_family:-x} $rule_src I
  50
  51         local src_spec dest_spec
  52         fw_get_negation src_spec '-s' "${rule_src_ip:+$rule_src_ip/$rule_src_ip_prefixlen}"
  53         fw_get_negation dest_spec '-d' "${rule_dest_ip:+$rule_dest_ip/$rule_dest_ip_prefixlen}"
  54
  55         [ "$rule_proto" == "tcpudp" ] && rule_proto="tcp udp"
  56         for rule_proto in $rule_proto; do
  57                 local rule_pos
  58                 eval 'rule_pos=$((++FW__RULE_COUNT_'${mode#G}'_'$chain'))'
  59
  60                 fw add $mode $table $chain $target $rule_pos { $rule_src_ip $rule_dest_ip } { \
  61                         $src_spec $dest_spec \
  62                         ${rule_proto:+-p $rule_proto} \
  63                         ${rule_src_port:+--sport $rule_src_port} \
  64                         ${rule_src_mac:+-m mac --mac-source $rule_src_mac} \
  65                         ${rule_dest_port:+--dport $rule_dest_port} \
  66                         ${rule_icmp_type:+--icmp-type $rule_icmp_type} \
  67                 }
  68         done
  69
  70         fw_callback post rule
  71 }