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 # Delete old firewall zone for freifunk
  16 handle_fwzone() {
  17         config_get name "$1" name
  18         config_get network "$1" network
  19
  20         if [ "$2" == "zoneconf" ]; then
  21                 # clean zone
  22                 if [ "$name" == "freifunk" ]; then
  23                         if [ "$cleanup" == 1 ]; then
  24                                 section_cleanup firewall.$1
  25                         else
  26                                 # rename section if unnamed
  27                                 if [ -z "${1/cfg[0-9a-fA-F]*/}" ]; then
  28                                         section_rename firewall $1 zone_freifunk
  29                                 fi
  30                         fi
  31                 else
  32
  33                         if [ "$name" == "$netrenamed" ]; then
  34                                 section_cleanup firewall.$1
  35                         fi
  36                         if [ -n "$netrenamed" -a -n "$(echo $network | grep $netrenamed)" ] && [ ! "$name" == "freifunk" ]; then
  37                                 echo "    Removed $netrenamed from firewall zone $name."
  38                                 network_new=$(echo $network | sed -e 's/'$netrenamed'//' -e 's/^ //' -e 's/  / /' -e 's/ $//')
  39                                 uci set firewall.$1.network="$network_new"
  40                         fi
  41                 fi
  42         else
  43                 # clean fw_rule, fw_forwarding, include and advanced
  44                 for option in src tcp_ecn path; do
  45                         config_get $option $1 $option
  46                 done
  47                 if [ "$src" == "freifunk" -o "$path" == "/etc/firewall.freifunk" -o -n "$tcpecn" ]; then
  48                         section_cleanup firewall.$1
  49                 fi
  50         fi
  51 }
  52
  53 config_foreach handle_fwzone zone zoneconf
  54
  55 if [ "$cleanup" == 1 ]; then
  56         for target in include advanced rule forwarding; do
  57                 config_foreach handle_fwzone $target
  58         done
  59 fi
  60
  61 # setup freifunk firewall zone
  62
  63 echo "    + Setup firewall zone."
  64
  65 # add $netrenamed and if needed ${netrenamed}dhcp to the networks for this zone
  66 config_get network zone_freifunk network
  67
  68 # remove ${netrenamed}dhcp from networks list
  69 [ -n "$network" -a -n "$net" ] && network="${network/${netrenamed}dhcp/}"
  70 network=$(echo $network) # Removes leading and trailing whitespaces
  71
  72 [ -n "$netrenamed" ] && [ -z "$(echo $network | grep $netrenamed)" ] && network="$network $netrenamed"
  73
  74 if [ "$type" == "atheros" -a "$vap" == 1 ]; then
  75         [ -n "$netrenamed" ] && [ "$network" == "${network/${netrenamed}dhcp/}" ] && network="$network ${netrenamed}dhcp"
  76 fi
  77
  78 uci batch << EOF
  79 set firewall.zone_freifunk="zone"
  80 set firewall.zone_freifunk.name="freifunk"
  81 set firewall.zone_freifunk.network="$network"
  82 set firewall.zone_freifunk.input="$zone_freifunk_input"
  83 set firewall.zone_freifunk.forward="$zone_freifunk_forward"
  84 set firewall.zone_freifunk.output="$zone_freifunk_output"
  85 EOF
  86
  87 echo "    network: $network
  88     input: $zone_freifunk_input
  89     forward: $zone_freifunk_forward
  90     output: $zone_freifunk_output"
  91
  92 # Usually we need to setup masquerading for lan, except lan is an olsr interface or has an olsr hna
  93
  94 echo "    + Setup masquerading rules"
  95
  96 handle_interface() {
  97         config_get interface "$1" interface
  98         if [ "$interface" == "lan" ]; then
  99                 no_masq_lan=1
 100         fi
 101 }
 102 config_load olsrd
 103 config_foreach handle_interface Interface
 104
 105 handle_hna() {
 106         config_get netaddr "$1" netaddr
 107         if [ "$NETWORK" == "$netaddr" ]; then
 108                 no_masq_lan=1
 109         fi
 110 }
 111 config_foreach handle_hna Hna4
 112
 113 currms=$(uci -q get firewall.zone_freifunk.masq_src)
 114 if [ ! "$no_masq_lan" == "1" ]; then
 115         uci set firewall.zone_freifunk.masq="1" && echo "    Enabled masquerading." || echo -e "\033[1mWarning:\033[0m: Could not enable masquerading."
 116         [ -z "$(echo $currms |grep lan)" ] && uci add_list firewall.zone_freifunk.masq_src="lan"
 117 fi
 118
 119 # If wifi-interfaces are outside of the mesh network they should be natted
 120 for i in $networks; do
 121         # Get dhcprange and meshnet
 122         dhcprange=$(uci get meshwizard.netconfig.$i\_dhcprange)
 123         meshnet="$(uci get profile_$community.profile.mesh_network)"
 124         # check if the dhcprange is inside meshnet
 125         dhcpinmesh="$($dir/helpers/check-range-in-range.sh $dhcprange $meshnet)"
 126         if [ ! "$dhcpinmesh" == 1 ]; then
 127                 [ -z "$(echo $currms |grep ${net}dhcp)" ] && uci add_list firewall.zone_freifunk.masq_src="${net}dhcp"
 128         fi
 129 done
 130
 131 # Rules, Forwardings, advanced config and includes
 132 # Clear firewall configuration
 133
 134 echo "    + Setup rules, forwardings, advanced config and includes."
 135
 136 for config in freifunk profile_$community; do
 137
 138         config_load $config
 139
 140         for section in advanced include fw_rule fw_forwarding; do
 141                 handle_firewall() {
 142                         local options=$(uci show $config."$1")
 143                         options=$(echo "$options" | sed -e "s/fw_//g" -e "s/^$config/firewall/g")
 144                         for o in $options; do
 145                                 uci set $o
 146                         done
 147                 }
 148                 config_foreach handle_firewall $section
 149         done
 150 done
 151
 152 uci commit