contrib/init.d/luci_fw

   1 #!/bin/sh /etc/rc.common
   2 START=46
   3
   4 apply_portfw() {
   5         local cfg="$1"
   6         config_get proto "$cfg" proto
   7         config_get dport "$cfg" dport
   8         config_get iface "$cfg" iface
   9         config_get to    "$cfg" to
  10
  11         ports=$(echo $to | cut -sd: -f2)
  12         [ -n "$ports" ] && ports="--dport $(echo $ports | sed -e 's/-/:/')"
  13
  14         ip=$(echo $to | cut -d: -f1)
  15
  16         if ([ "$proto" == "tcpudp" ] || [ "$proto" == "tcp" ]); then
  17                 iptables -t nat -A luci_prerouting -i "$iface" -p tcp --dport "$dport" -j DNAT --to "$to"
  18                 iptables -t nat -A luci_postrouting -p tcp -d "$ip" $ports -j MASQUERADE
  19                 iptables -A luci_forward -i "$iface" -p tcp -d "$ip" $ports -j ACCEPT
  20         fi
  21
  22         if ([ "$proto" == "tcpudp" ] || [ "$proto" == "udp" ]); then
  23                 iptables -t nat -A luci_prerouting -i "$iface" -p udp --dport "$dport" -j DNAT --to "$to"
  24                 iptables -t nat -A luci_postrouting -p udp -d "$ip" $ports -j MASQUERADE
  25                 iptables -A luci_forward -i "$iface" -p udp -d "$ip" $ports -j ACCEPT
  26         fi
  27 }
  28
  29 apply_rule() {
  30         local cfg="$1"
  31         local cmd=""
  32
  33         config_get chain "$cfg" chain
  34         [ -n "$chain" ] || return 0
  35         [ "$chain" == "forward" ] && cmd="$cmd -A luci_forward"
  36         [ "$chain" == "input" ] && cmd="$cmd -A luci_input"
  37         [ "$chain" == "output" ] && cmd="$cmd -A luci_output"
  38         [ "$chain" == "prerouting" ] && cmd="$cmd -t nat -A luci_prerouting"
  39         [ "$chain" == "postrouting" ] && cmd="$cmd -t nat -A luci_postrouting"
  40
  41         config_get iface "$cfg" iface
  42         [ -n "$iface" ] && cmd="$cmd -i $iface"
  43
  44         config_get oface "$cfg" oface
  45         [ -n "$oface" ] && cmd="$cmd -o $oface"
  46
  47         config_get proto "$cfg" proto
  48         [ -n "$proto" ] && cmd="$cmd -p $proto"
  49
  50         config_get source "$cfg" source
  51         [ -n "$source" ] && cmd="$cmd -s $source"
  52
  53         config_get destination "$cfg" destination
  54         [ -n "$destination" ] && cmd="$cmd -d $destination"
  55
  56         config_get sport "$cfg" sport
  57         [ -n "$sport" ] && cmd="$cmd --sport $sport"
  58
  59         config_get dport "$cfg" dport
  60         [ -n "$dport" ] && cmd="$cmd --dport $dport"
  61
  62         config_get todest "$cfg" todest
  63         [ -n "$todest" ] && cmd="$cmd --to-destination $todest"
  64
  65         config_get tosrc "$cfg" tosrc
  66         [ -n "$tosrc" ] && cmd="$cmd --to-source $tosrc"
  67
  68         config_get jump "$cfg" jump
  69         [ -n "$jump" ] && cmd="$cmd -j $jump"
  70
  71         config_get command "$cfg" command
  72         [ -n "$command" ] && cmd="$cmd $command"
  73
  74         iptables $cmd
  75 }
  76
  77 start() {
  78         ### Create subchains
  79         iptables -N luci_input
  80         iptables -N luci_output
  81         iptables -N luci_forward
  82         iptables -t nat -N luci_prerouting
  83         iptables -t nat -N luci_postrouting
  84
  85         ### Hook in the chains
  86         iptables -A input_rule -j luci_input
  87         iptables -A output_rule -j luci_output
  88         iptables -A forwarding_rule -j luci_forward
  89         iptables -t nat -A prerouting_rule -j luci_prerouting
  90         iptables -t nat -A postrouting_rule -j luci_postrouting
  91
  92         ### Read chains from config
  93         config_load luci_fw
  94         config_foreach apply_portfw portfw
  95         config_foreach apply_rule rule
  96 }
  97
  98 stop() {
  99         ### Hook out the chains
 100         iptables -D input_rule -j luci_input
 101         iptables -D output_rule -j luci_output
 102         iptables -D forwarding_rule -j luci_forward
 103         iptables -t nat -D prerouting_rule -j luci_prerouting
 104         iptables -t nat -D postrouting_rule -j luci_postrouting
 105
 106         ### Clear subchains
 107         iptables -F luci_input
 108         iptables -F luci_output
 109         iptables -F luci_forward
 110         iptables -t nat -F luci_prerouting
 111         iptables -t nat -F luci_postrouting
 112
 113         ### Delete subchains
 114         iptables -X luci_input
 115         iptables -X luci_output
 116         iptables -X luci_forward
 117         iptables -t nat -X luci_prerouting
 118         iptables -t nat -X luci_postrouting
 119 }