package/network/config/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 ${rule_name}: needs src, skipping"
  31                 return 0
  32         }
  33
  34         fw_callback pre rule
  35
  36         local table=f
  37         local chain=delegate_output
  38         local target="${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                                 if [ -n "$rule_dest" ]; then
  46                                         chain="zone_${rule_src}_forward"
  47                                 else
  48                                         chain="zone_${rule_src}_input"
  49                                 fi
  50                         else
  51                                 chain="${rule_dest:+delegate_forward}"
  52                                 chain="${chain:-delegate_input}"
  53                         fi
  54                 fi
  55
  56                 if [ -n "$rule_dest" ]; then
  57                         if [ "$rule_dest" != "*" ]; then
  58                                 target="zone_${rule_dest}_dest_${target}"
  59                                 if [ -z "$rule_src" ]; then
  60                                         chain="zone_${rule_dest}_output"
  61                                 fi
  62                         elif [ "$target" = REJECT ]; then
  63                                 target=reject
  64                         fi
  65                 fi
  66         fi
  67
  68         local mode
  69         fw_get_family_mode mode ${rule_family:-x} "$rule_src" I
  70
  71         local src_spec dest_spec
  72         fw_get_negation src_spec '-s' "${rule_src_ip:+$rule_src_ip/$rule_src_ip_prefixlen}"
  73         fw_get_negation dest_spec '-d' "${rule_dest_ip:+$rule_dest_ip/$rule_dest_ip_prefixlen}"
  74
  75         [ "$rule_proto" == "tcpudp" ] && rule_proto="tcp udp"
  76         local pr; for pr in $rule_proto; do
  77                 local sports dports itypes
  78                 case "$pr" in
  79                         icmp|icmpv6|1|58)
  80                                 sports=""; dports=""
  81                                 itypes="$rule_icmp_type"
  82                         ;;
  83                         *)
  84                                 sports="$rule_src_port"
  85                                 dports="$rule_dest_port"
  86                                 itypes=""
  87                         ;;
  88                 esac
  89
  90                 fw_get_negation pr '-p' "$pr"
  91                 local sp; for sp in ${sports:-""}; do
  92                         fw_get_port_range sp $sp
  93                         fw_get_negation sp '--sport' "$sp"
  94                         local dp; for dp in ${dports:-""}; do
  95                                 fw_get_port_range dp $dp
  96                                 fw_get_negation dp '--dport' "$dp"
  97                                 local sm; for sm in ${rule_src_mac:-""}; do
  98                                         fw_get_negation sm '--mac-source' "$sm"
  99                                         local it; for it in ${itypes:-""}; do
 100                                                 fw_get_negation it '--icmp-type' "$it"
 101                                                 fw add $mode $table $chain $target + \
 102                                                         { $rule_src_ip $rule_dest_ip } { \
 103                                                         $src_spec $dest_spec \
 104                                                         $pr $sp $dp $it \
 105                                                         ${sm:+-m mac $sm} \
 106                                                         ${rule_limit:+-m limit --limit $rule_limit \
 107                                                                 ${rule_limit_burst:+--limit-burst $rule_limit_burst}} \
 108                                                         $rule_extra \
 109                                                 }
 110                                         done
 111                                 done
 112                         done
 113                 done
 114         done
 115
 116         fw_callback post rule
 117 }