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 $rule_proto; do
  70                 fw_get_negation pr '-p' "$pr"
  71                 local sp; for sp in ${rule_src_port:-""}; do
  72                         fw_get_port_range sp $sp
  73                         fw_get_negation sp '--sport' "$sp"
  74                         local dp; for dp in ${rule_dest_port:-""}; do
  75                                 fw_get_port_range dp $dp
  76                                 fw_get_negation dp '--dport' "$dp"
  77                                 local sm; for sm in ${rule_src_mac:-""}; do
  78                                         fw_get_negation sm '--mac-source' "$sm"
  79                                         local it; for it in ${rule_icmp_type:-""}; do
  80                                                 fw_get_negation it '--icmp-type' "$it"
  81                                                 case "$pr" in
  82                                                         *" icmp"|*" icmpv6"|*" 1"|*" 58") sp=""; dp="" ;;
  83                                                         *) it="" ;;
  84                                                 esac
  85                                                 fw add $mode $table $chain $target + \
  86                                                         { $rule_src_ip $rule_dest_ip } { \
  87                                                         $src_spec $dest_spec \
  88                                                         $pr $sp $dp $it \
  89                                                         ${sm:+-m mac $sm} \
  90                                                         ${rule_limit:+-m limit --limit $rule_limit \
  91                                                                 ${rule_limit_burst:+--limit-burst $rule_limit_burst}} \
  92                                                         $rule_extra \
  93                                                 }
  94                                         done
  95                                 done
  96                         done
  97                 done
  98         done
  99
 100         fw_callback post rule
 101 }