contrib/package/meshwizard/files/usr/bin/meshwizard/helpers/setup_firewall.sh

   1 #!/bin/sh
   2 # This will add $net to the zone firewall (and remove it from other zones where it is referenced)
   3 # It will also setup rules defined in /etc/config/freifunk and /etc/config/profile_<community>
   4 # Arg $1 = $net
   5
   6 net=$1
   7 . /etc/functions.sh
   8 . $dir/functions.sh
   9 config_load firewall
  10
  11 # Get some variables
  12 type="$(uci -q get wireless.$net.type)"
  13 vap="$(uci -q get meshwizard.netconfig.$net\_vap)"
  14
  15 # Add local_restrict to wan firewall zone
  16 handle_zonewan() {
  17         config_get name "$1" name
  18         if [ "$name" == "wan" ]; then
  19                 uci set firewall.$1.local_restrict=1
  20         fi
  21 }
  22 config_foreach handle_zonewan zone && uci_commitverbose "Enable local_restrict for zone wan" firewall
  23
  24 # Delete old firewall zone for freifunk
  25 handle_fwzone() {
  26         config_get name "$1" name
  27         config_get network "$1" network
  28
  29         if [ "$2" == "zoneconf" ]; then
  30                 # clean zone
  31                 if [ "$name" == "freifunk" ]; then
  32                         if [ "$cleanup" == 1 ]; then
  33                                 section_cleanup firewall.$1
  34                         else
  35                                 # rename section if unnamed
  36                                 if [ -z "${1/cfg[0-9a-fA-F]*/}" ]; then
  37                                         section_rename firewall $1 zone_freifunk
  38                                 fi
  39                         fi
  40                 else
  41
  42                         if [ "$name" == "$netrenamed" ]; then
  43                                 section_cleanup firewall.$1
  44                         fi
  45                         if [ -n "$netrenamed" -a -n "$(echo $network | grep $netrenamed)" ] && [ ! "$name" == "freifunk" ]; then
  46                                 echo "    Removed $netrenamed from firewall zone $name."
  47                                 network_new=$(echo $network | sed -e 's/'$netrenamed'//' -e 's/^ //' -e 's/  / /' -e 's/ $//')
  48                                 uci set firewall.$1.network="$network_new"
  49                         fi
  50                 fi
  51         else
  52                 # clean fw_rule, fw_forwarding, include and advanced
  53                 for option in src tcp_ecn path; do
  54                         config_get $option $1 $option
  55                 done
  56                 if [ "$src" == "freifunk" -o "$path" == "/etc/firewall.freifunk" -o -n "$tcpecn" ]; then
  57                         section_cleanup firewall.$1
  58                 fi
  59         fi
  60 }
  61
  62 config_foreach handle_fwzone zone zoneconf
  63
  64 if [ "$cleanup" == 1 ]; then
  65         for target in include advanced rule forwarding; do
  66                 config_foreach handle_fwzone $target
  67         done
  68 fi
  69
  70 # setup freifunk firewall zone
  71
  72 # add $netrenamed and if needed ${netrenamed}dhcp to the networks for this zone
  73 config_get network zone_freifunk network
  74
  75 # remove ${netrenamed}dhcp from networks list
  76 [ -n "$network" -a -n "$net" ] && network="${network/${netrenamed}dhcp/}"
  77 network=$(echo $network) # Removes leading and trailing whitespaces
  78
  79 [ -n "$netrenamed" ] && [ -z "$(echo $network | grep $netrenamed)" ] && network="$network $netrenamed"
  80
  81 if [ "$type" == "atheros" -a "$vap" == 1 ]; then
  82         [ -n "$netrenamed" ] && [ "$network" == "${network/${netrenamed}dhcp/}" ] && network="$network ${netrenamed}dhcp"
  83 fi
  84
  85 uci batch << EOF
  86 set firewall.zone_freifunk="zone"
  87 set firewall.zone_freifunk.name="freifunk"
  88 set firewall.zone_freifunk.network="$network"
  89 set firewall.zone_freifunk.input="$zone_freifunk_input"
  90 set firewall.zone_freifunk.forward="$zone_freifunk_forward"
  91 set firewall.zone_freifunk.output="$zone_freifunk_output"
  92 EOF
  93
  94 uci_commitverbose "Setup freifunk firewall zone" firewall
  95
  96 # Usually we need to setup masquerading for lan, except lan is an olsr interface or has an olsr hna
  97
  98 handle_interface() {
  99         config_get interface "$1" interface
 100         if [ "$interface" == "lan" ]; then
 101                 no_masq_lan=1
 102         fi
 103 }
 104 config_load olsrd
 105 config_foreach handle_interface Interface
 106
 107 handle_hna() {
 108         config_get netaddr "$1" netaddr
 109         if [ "$NETWORK" == "$netaddr" ]; then
 110                 no_masq_lan=1
 111         fi
 112 }
 113 config_foreach handle_hna Hna4
 114
 115 currms=$(uci -q get firewall.zone_freifunk.masq_src)
 116 if [ ! "$no_masq_lan" == "1" ]; then
 117         uci set firewall.zone_freifunk.masq="1"
 118         [ -z "$(echo $currms |grep lan)" ] && uci add_list firewall.zone_freifunk.masq_src="lan"
 119 fi
 120
 121 # If wifi-interfaces are outside of the mesh network they should be natted
 122 for i in $networks; do
 123         # Get dhcprange and meshnet
 124         dhcprange=$(uci get meshwizard.netconfig.$i\_dhcprange)
 125         meshnet="$(uci get profile_$community.profile.mesh_network)"
 126         # check if the dhcprange is inside meshnet
 127         dhcpinmesh="$($dir/helpers/check-range-in-range.sh $dhcprange $meshnet)"
 128         if [ ! "$dhcpinmesh" == 1 ]; then
 129                 [ -z "$(echo $currms |grep ${netrenamed}dhcp)" ] && uci add_list firewall.zone_freifunk.masq_src="${netrenamed}dhcp"
 130         fi
 131 done
 132
 133 uci_commitverbose "Setup masquerading rules" firewall
 134
 135 # Rules, Forwardings, advanced config and includes
 136 # Clear firewall configuration
 137
 138 for config in freifunk profile_$community; do
 139
 140         config_load $config
 141
 142         for section in advanced include fw_rule fw_forwarding; do
 143                 handle_firewall() {
 144                         local options=$(uci show $config."$1")
 145                         options=$(echo "$options" | sed -e "s/fw_//g" -e "s/^$config/firewall/g")
 146                         for o in $options; do
 147                                 uci set $o
 148                         done
 149                 }
 150                 config_foreach handle_firewall $section
 151         done
 152 done
 153
 154 uci_commitverbose "Setup rules, forwardings, advanced config and includes." firewall