applications/luci-fw/root/etc/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    "$cfg" to
  10
  11         config_get ifname "$iface" ifname
  12
  13         [ -n "$proto" ] || return 0
  14         [ -n "$dport" ] || return 0
  15         [ -n "$ifname" ] || return 0
  16         [ -n "$to" ] || return 0
  17
  18         ports=$(echo $to | cut -sd: -f2)
  19         if [ -n "$ports" ]; then
  20                 ports="--dport $(echo $ports | sed -e 's/-/:/')"
  21         else
  22                 ports="--dport $dport"
  23         fi
  24
  25         ip=$(echo $to | cut -d: -f1)
  26
  27         if ([ "$proto" == "tcpudp" ] || [ "$proto" == "tcp" ]); then
  28                 iptables -t nat -A luci_fw_prerouting -i "$ifname" -p tcp --dport "$dport" -j DNAT --to "$to"
  29                 iptables -A luci_fw_forward -i "$ifname" -p tcp -d "$ip" $ports -j ACCEPT
  30         fi
  31
  32         if ([ "$proto" == "tcpudp" ] || [ "$proto" == "udp" ]); then
  33                 iptables -t nat -A luci_fw_prerouting -i "$ifname" -p udp --dport "$dport" -j DNAT --to "$to"
  34                 iptables -A luci_fw_forward -i "$ifname" -p udp -d "$ip" $ports -j ACCEPT
  35         fi
  36 }
  37
  38 apply_routing() {
  39         local cfg="$1"
  40         config_get iface "$cfg" iface
  41         config_get oface "$cfg" oface
  42         config_get_bool fwd "$cfg" fwd
  43         config_get_bool nat "$cfg" nat
  44         config_get_bool bidi "$cfg" bidi
  45
  46         config_get ifname "$iface" ifname
  47         config_get ofname "$oface" ifname
  48
  49         [ -n "$ifname" ] || return 0
  50         [ -n "$ofname" ] || return 0
  51
  52         [ "$fwd" -gt 0 ] && {
  53                 iptables -A luci_fw_forward -i "$ifname" -o "$ofname" -j ACCEPT
  54                 [ "$bidi" -gt 0 ] && iptables -A luci_fw_forward -i "$ofname" -o "$ifname" -j ACCEPT
  55         }
  56
  57         [ "$nat" -gt 0 ] && {
  58                 config_get ifip "$iface" ipaddr
  59                 config_get ifmask "$iface" netmask
  60                 eval "$(ipcalc.sh $ifip $ifmask)"
  61
  62                 iptables -t nat -A luci_fw_postrouting -s "$NETWORK/$PREFIX" -o "$ofname" -j MASQUERADE
  63
  64                 [ "$bidi" -gt 0 ] && {
  65                         config_get ofip "$oface" ipaddr
  66                         config_get ofmask "$oface" netmask
  67                         eval "$(ipcalc.sh $ofip $ofmask)"
  68
  69                         iptables -t nat -A luci_fw_postrouting -s "$NETWORK/$PREFIX" -o "$ifname" -j MASQUERADE
  70                 }
  71         }
  72 }
  73
  74 apply_rule() {
  75         local cfg="$1"
  76         local cmd=""
  77
  78         config_get chain "$cfg" chain
  79         [ -n "$chain" ] || return 0
  80         [ "$chain" == "forward" ] && cmd="$cmd -A luci_fw_forward"
  81         [ "$chain" == "input" ] && cmd="$cmd -A luci_fw_input"
  82         [ "$chain" == "output" ] && cmd="$cmd -A luci_fw_output"
  83         [ "$chain" == "prerouting" ] && cmd="$cmd -t nat -A luci_fw_prerouting"
  84         [ "$chain" == "postrouting" ] && cmd="$cmd -t nat -A luci_fw_postrouting"
  85
  86         config_get iface "$cfg" iface
  87         config_get ifname "$iface" ifname
  88         [ -n "$ifname" ] && cmd="$cmd -i $ifname"
  89
  90         config_get oface "$cfg" oface
  91         config_get ofname "$oface" ifname
  92         [ -n "$ofname" ] && cmd="$cmd -o $ofname"
  93
  94         config_get proto "$cfg" proto
  95         [ -n "$proto" ] && cmd="$cmd -p $proto"
  96
  97         config_get source "$cfg" source
  98         [ -n "$source" ] && cmd="$cmd -s $source"
  99
 100         config_get destination "$cfg" destination
 101         [ -n "$destination" ] && cmd="$cmd -d $destination"
 102
 103         config_get sport "$cfg" sport
 104         [ -n "$sport" ] && cmd="$cmd --sport $sport"
 105
 106         config_get dport "$cfg" dport
 107         [ -n "$dport" ] && cmd="$cmd --dport $dport"
 108
 109         config_get todest "$cfg" todest
 110         [ -n "$todest" ] && cmd="$cmd --to-destination $todest"
 111
 112         config_get tosrc "$cfg" tosrc
 113         [ -n "$tosrc" ] && cmd="$cmd --to-source $tosrc"
 114
 115         config_get mac "$cfg" mac
 116         [ -n "$mac" ] && cmd="$cmd -m mac --mac-source $mac"
 117
 118         config_get jump "$cfg" jump
 119         [ -n "$jump" ] && cmd="$cmd -j $jump"
 120
 121         config_get command "$cfg" command
 122         [ -n "$command" ] && cmd="$cmd $command"
 123
 124         iptables $cmd
 125 }
 126
 127 start() {
 128         ### Create subchains
 129         iptables -N luci_fw_input
 130         iptables -N luci_fw_output
 131         iptables -N luci_fw_forward
 132         iptables -t nat -N luci_fw_prerouting
 133         iptables -t nat -N luci_fw_postrouting
 134
 135         ### Hook in the chains
 136         iptables -A input_rule -j luci_fw_input
 137         iptables -A output_rule -j luci_fw_output
 138         iptables -A forwarding_rule -j luci_fw_forward
 139         iptables -t nat -A prerouting_rule -j luci_fw_prerouting
 140         iptables -t nat -A postrouting_rule -j luci_fw_postrouting
 141
 142         ### Scan network interfaces
 143         include /lib/network
 144         scan_interfaces
 145
 146         ### Read chains from config
 147         config_load luci_fw
 148         config_foreach apply_rule rule
 149         config_foreach apply_portfw portfw
 150         config_foreach apply_routing routing
 151 }
 152
 153 stop() {
 154         ### Hook out the chains
 155         iptables -D input_rule -j luci_fw_input
 156         iptables -D output_rule -j luci_fw_output
 157         iptables -D forwarding_rule -j luci_fw_forward
 158         iptables -t nat -D prerouting_rule -j luci_fw_prerouting
 159         iptables -t nat -D postrouting_rule -j luci_fw_postrouting
 160
 161         ### Clear subchains
 162         iptables -F luci_fw_input
 163         iptables -F luci_fw_output
 164         iptables -F luci_fw_forward
 165         iptables -t nat -F luci_fw_prerouting
 166         iptables -t nat -F luci_fw_postrouting
 167
 168         ### Delete subchains
 169         iptables -X luci_fw_input
 170         iptables -X luci_fw_output
 171         iptables -X luci_fw_forward
 172         iptables -t nat -X luci_fw_prerouting
 173         iptables -t nat -X luci_fw_postrouting
 174 }