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 $to | cut -sd: -f2)
  12         if [ -n "$ports" ]; then
  13                 ports="--dport $(echo $ports | sed -e 's/-/:/')"
  14         else
  15                 ports="--dport $dport"
  16         fi
  17
  18         ip=$(echo $to | cut -d: -f1)
  19
  20         if ([ "$proto" == "tcpudp" ] || [ "$proto" == "tcp" ]); then
  21                 iptables -t nat -A luci_prerouting -i "$iface" -p tcp --dport "$dport" -j DNAT --to "$to"
  22                 iptables -A luci_forward -i "$iface" -p tcp -d "$ip" $ports -j ACCEPT
  23         fi
  24
  25         if ([ "$proto" == "tcpudp" ] || [ "$proto" == "udp" ]); then
  26                 iptables -t nat -A luci_prerouting -i "$iface" -p udp --dport "$dport" -j DNAT --to "$to"
  27                 iptables -A luci_forward -i "$iface" -p udp -d "$ip" $ports -j ACCEPT
  28         fi
  29 }
  30
  31 apply_rule() {
  32         local cfg="$1"
  33         local cmd=""
  34
  35         config_get chain "$cfg" chain
  36         [ -n "$chain" ] || return 0
  37         [ "$chain" == "forward" ] && cmd="$cmd -A luci_forward"
  38         [ "$chain" == "input" ] && cmd="$cmd -A luci_input"
  39         [ "$chain" == "output" ] && cmd="$cmd -A luci_output"
  40         [ "$chain" == "prerouting" ] && cmd="$cmd -t nat -A luci_prerouting"
  41         [ "$chain" == "postrouting" ] && cmd="$cmd -t nat -A luci_postrouting"
  42
  43         config_get iface "$cfg" iface
  44         [ -n "$iface" ] && cmd="$cmd -i $iface"
  45
  46         config_get oface "$cfg" oface
  47         [ -n "$oface" ] && cmd="$cmd -o $oface"
  48
  49         config_get proto "$cfg" proto
  50         [ -n "$proto" ] && cmd="$cmd -p $proto"
  51
  52         config_get source "$cfg" source
  53         [ -n "$source" ] && cmd="$cmd -s $source"
  54
  55         config_get destination "$cfg" destination
  56         [ -n "$destination" ] && cmd="$cmd -d $destination"
  57
  58         config_get sport "$cfg" sport
  59         [ -n "$sport" ] && cmd="$cmd --sport $sport"
  60
  61         config_get dport "$cfg" dport
  62         [ -n "$dport" ] && cmd="$cmd --dport $dport"
  63
  64         config_get todest "$cfg" todest
  65         [ -n "$todest" ] && cmd="$cmd --to-destination $todest"
  66
  67         config_get tosrc "$cfg" tosrc
  68         [ -n "$tosrc" ] && cmd="$cmd --to-source $tosrc"
  69
  70         config_get jump "$cfg" jump
  71         [ -n "$jump" ] && cmd="$cmd -j $jump"
  72
  73         config_get command "$cfg" command
  74         [ -n "$command" ] && cmd="$cmd $command"
  75
  76         iptables $cmd
  77 }
  78
  79 start() {
  80         ### Create subchains
  81         iptables -N luci_input
  82         iptables -N luci_output
  83         iptables -N luci_forward
  84         iptables -t nat -N luci_prerouting
  85         iptables -t nat -N luci_postrouting
  86
  87         ### Hook in the chains
  88         iptables -A input_rule -j luci_input
  89         iptables -A output_rule -j luci_output
  90         iptables -A forwarding_rule -j luci_forward
  91         iptables -t nat -A prerouting_rule -j luci_prerouting
  92         iptables -t nat -A postrouting_rule -j luci_postrouting
  93
  94         ### Read chains from config
  95         config_load luci_fw
  96         config_foreach apply_portfw portfw
  97         config_foreach apply_rule rule
  98 }
  99
 100 stop() {
 101         ### Hook out the chains
 102         iptables -D input_rule -j luci_input
 103         iptables -D output_rule -j luci_output
 104         iptables -D forwarding_rule -j luci_forward
 105         iptables -t nat -D prerouting_rule -j luci_prerouting
 106         iptables -t nat -D postrouting_rule -j luci_postrouting
 107
 108         ### Clear subchains
 109         iptables -F luci_input
 110         iptables -F luci_output
 111         iptables -F luci_forward
 112         iptables -t nat -F luci_prerouting
 113         iptables -t nat -F luci_postrouting
 114
 115         ### Delete subchains
 116         iptables -X luci_input
 117         iptables -X luci_output
 118         iptables -X luci_forward
 119         iptables -t nat -X luci_prerouting
 120         iptables -t nat -X luci_postrouting
 121 }