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 && echo "    + Enable local_restrict for zone wan"
  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 echo "    + Setup firewall zone."
  73
  74 # add $netrenamed and if needed ${netrenamed}dhcp to the networks for this zone
  75 config_get network zone_freifunk network
  76
  77 # remove ${netrenamed}dhcp from networks list
  78 [ -n "$network" -a -n "$net" ] && network="${network/${netrenamed}dhcp/}"
  79 network=$(echo $network) # Removes leading and trailing whitespaces
  80
  81 [ -n "$netrenamed" ] && [ -z "$(echo $network | grep $netrenamed)" ] && network="$network $netrenamed"
  82
  83 if [ "$type" == "atheros" -a "$vap" == 1 ]; then
  84         [ -n "$netrenamed" ] && [ "$network" == "${network/${netrenamed}dhcp/}" ] && network="$network ${netrenamed}dhcp"
  85 fi
  86
  87 uci batch << EOF
  88 set firewall.zone_freifunk="zone"
  89 set firewall.zone_freifunk.name="freifunk"
  90 set firewall.zone_freifunk.network="$network"
  91 set firewall.zone_freifunk.input="$zone_freifunk_input"
  92 set firewall.zone_freifunk.forward="$zone_freifunk_forward"
  93 set firewall.zone_freifunk.output="$zone_freifunk_output"
  94 EOF
  95
  96 echo "    network: $network
  97     input: $zone_freifunk_input
  98     forward: $zone_freifunk_forward
  99     output: $zone_freifunk_output"
 100
 101 # Usually we need to setup masquerading for lan, except lan is an olsr interface or has an olsr hna
 102
 103 echo "    + Setup masquerading rules"
 104
 105 handle_interface() {
 106         config_get interface "$1" interface
 107         if [ "$interface" == "lan" ]; then
 108                 no_masq_lan=1
 109         fi
 110 }
 111 config_load olsrd
 112 config_foreach handle_interface Interface
 113
 114 handle_hna() {
 115         config_get netaddr "$1" netaddr
 116         if [ "$NETWORK" == "$netaddr" ]; then
 117                 no_masq_lan=1
 118         fi
 119 }
 120 config_foreach handle_hna Hna4
 121
 122 currms=$(uci -q get firewall.zone_freifunk.masq_src)
 123 if [ ! "$no_masq_lan" == "1" ]; then
 124         uci set firewall.zone_freifunk.masq="1" && echo "    Enabled masquerading." || echo -e "\033[1mWarning:\033[0m: Could not enable masquerading."
 125         [ -z "$(echo $currms |grep lan)" ] && uci add_list firewall.zone_freifunk.masq_src="lan"
 126 fi
 127
 128 # If wifi-interfaces are outside of the mesh network they should be natted
 129 for i in $networks; do
 130         # Get dhcprange and meshnet
 131         dhcprange=$(uci get meshwizard.netconfig.$i\_dhcprange)
 132         meshnet="$(uci get profile_$community.profile.mesh_network)"
 133         # check if the dhcprange is inside meshnet
 134         dhcpinmesh="$($dir/helpers/check-range-in-range.sh $dhcprange $meshnet)"
 135         if [ ! "$dhcpinmesh" == 1 ]; then
 136                 [ -z "$(echo $currms |grep ${netrenamed}dhcp)" ] && uci add_list firewall.zone_freifunk.masq_src="${netrenamed}dhcp"
 137         fi
 138 done
 139
 140 # Rules, Forwardings, advanced config and includes
 141 # Clear firewall configuration
 142
 143 echo "    + Setup rules, forwardings, advanced config and includes."
 144
 145 for config in freifunk profile_$community; do
 146
 147         config_load $config
 148
 149         for section in advanced include fw_rule fw_forwarding; do
 150                 handle_firewall() {
 151                         local options=$(uci show $config."$1")
 152                         options=$(echo "$options" | sed -e "s/fw_//g" -e "s/^$config/firewall/g")
 153                         for o in $options; do
 154                                 uci set $o
 155                         done
 156                 }
 157                 config_foreach handle_firewall $section
 158         done
 159 done
 160
 161 uci commit