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 "$1" \
   7                 string name "" \
   8                 string src "" \
   9                 ipaddr src_ip "" \
  10                 string src_mac "" \
  11                 string src_port "" \
  12                 string dest "" \
  13                 ipaddr dest_ip "" \
  14                 string dest_port "" \
  15                 string icmp_type "" \
  16                 string proto "tcpudp" \
  17                 string target "" \
  18                 string family "" \
  19                 string limit "" \
  20                 string limit_burst "" \
  21                 string extra "" \
  22         } || return
  23         [ -n "$rule_name" ] || rule_name=$rule__name
  24 }
  25
  26 fw_load_rule() {
  27         fw_config_get_rule "$1"
  28
  29         [ "$rule_target" != "NOTRACK" ] || [ -n "$rule_src" ] || [ "$rule_src" != "*" ] || {
  30                 fw_log error "NOTRACK rule ${rule_name}: needs src, skipping"
  31                 return 0
  32         }
  33
  34         fw_callback pre rule
  35
  36         local table=f
  37         local chain=input
  38         local target="${rule_target:-REJECT}"
  39         if [ "$target" == "NOTRACK" ]; then
  40                 table=r
  41                 chain="zone_${rule_src}_notrack"
  42         else
  43                 if [ -n "$rule_src" ]; then
  44                         if [ "$rule_src" != "*" ]; then
  45                                 chain="zone_${rule_src}${rule_dest:+_forward}"
  46                         else
  47                                 chain="${rule_dest:+forward}"
  48                                 chain="${chain:-input}"
  49                         fi
  50                 fi
  51
  52                 if [ -n "$rule_dest" ]; then
  53                         if [ "$rule_dest" != "*" ]; then
  54                                 target="zone_${rule_dest}_${target}"
  55                         elif [ "$target" = REJECT ]; then
  56                                 target=reject
  57                         fi
  58                 fi
  59         fi
  60
  61         local mode
  62         fw_get_family_mode mode ${rule_family:-x} "$rule_src" I
  63
  64         local src_spec dest_spec
  65         fw_get_negation src_spec '-s' "${rule_src_ip:+$rule_src_ip/$rule_src_ip_prefixlen}"
  66         fw_get_negation dest_spec '-d' "${rule_dest_ip:+$rule_dest_ip/$rule_dest_ip_prefixlen}"
  67
  68         [ "$rule_proto" == "tcpudp" ] && rule_proto="tcp udp"
  69         local pr; for pr in $rule_proto; do
  70                 local sports dports itypes
  71                 case "$pr" in
  72                         icmp|icmpv6|1|58)
  73                                 sports=""; dports=""
  74                                 itypes="$rule_icmp_type"
  75                         ;;
  76                         *)
  77                                 sports="$rule_src_port"
  78                                 dports="$rule_dest_port"
  79                                 itypes=""
  80                         ;;
  81                 esac
  82
  83                 fw_get_negation pr '-p' "$pr"
  84                 local sp; for sp in ${sports:-""}; do
  85                         fw_get_port_range sp $sp
  86                         fw_get_negation sp '--sport' "$sp"
  87                         local dp; for dp in ${dports:-""}; do
  88                                 fw_get_port_range dp $dp
  89                                 fw_get_negation dp '--dport' "$dp"
  90                                 local sm; for sm in ${rule_src_mac:-""}; do
  91                                         fw_get_negation sm '--mac-source' "$sm"
  92                                         local it; for it in ${itypes:-""}; do
  93                                                 fw_get_negation it '--icmp-type' "$it"
  94                                                 fw add $mode $table $chain $target + \
  95                                                         { $rule_src_ip $rule_dest_ip } { \
  96                                                         $src_spec $dest_spec \
  97                                                         $pr $sp $dp $it \
  98                                                         ${sm:+-m mac $sm} \
  99                                                         ${rule_limit:+-m limit --limit $rule_limit \
 100                                                                 ${rule_limit_burst:+--limit-burst $rule_limit_burst}} \
 101                                                         $rule_extra \
 102                                                 }
 103                                         done
 104                                 done
 105                         done
 106                 done
 107         done
 108
 109         fw_callback post rule
 110 }