#!/bin/sh
#
#  This is automatically generated file. DO NOT MODIFY !
#
#  Firewall Builder  fwb_ipt v5.1.0.3599
#
#  Generated Fri Feb 20 18:57:37 2015 CET by admin
#
# files: * NATmitFW.fw /var/fwbuilder/NATmitFW.fw
#
# Compiled for iptables 1.4.1.1
#

# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6
# NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6

# NATmitFW:Policy:: warning: Backup ssh access rule could not be added to IPv6 policy because specified address '127.0.0.1' is invalid


FWBDEBUG=""

PATH="/sbin:/usr/sbin:/bin:/usr/bin:${PATH}"
export PATH



LSMOD="/usr/bin/lsmod"
MODPROBE="/usr/sbin/modprobe"
IPTABLES="/usr/sbin/iptables"
IP6TABLES="/usr/sbin/ip6tables"
IPTABLES_RESTORE="/usr/sbin/iptables-restore"
IP6TABLES_RESTORE="/usr/sbin/ip6tables-restore"
IP="/usr/sbin/ip"
IFCONFIG="ifconfig"
VCONFIG="/usr/sbin/vconfig"
BRCTL="brctl"
IFENSLAVE="/usr/sbin/ifenslave"
IPSET="/usr/sbin/ipset"
LOGGER="/usr/bin/logger"

log() {
    echo "$1"
    which "$LOGGER" >/dev/null 2>&1 && $LOGGER -p info "$1"
}

getInterfaceVarName() {
    echo $1 | sed 's/\./_/'
}

getaddr_internal() {
    dev=$1
    name=$2
    af=$3
    L=$($IP $af addr show dev $dev |  sed -n '/inet/{s!.*inet6* !!;s!/.*!!p}' | sed 's/peer.*//')
    test -z "$L" && {
        eval "$name=''"
        return
    }
    eval "${name}_list=\"$L\""
}

getnet_internal() {
    dev=$1
    name=$2
    af=$3
    L=$($IP route list proto kernel | grep $dev | grep -v default |  sed 's! .*$!!')
    test -z "$L" && {
        eval "$name=''"
        return
    }
    eval "${name}_list=\"$L\""
}


getaddr() {
    getaddr_internal $1 $2 "-4"
}

getaddr6() {
    getaddr_internal $1 $2 "-6"
}

getnet() {
    getnet_internal $1 $2 "-4"
}

getnet6() {
    getnet_internal $1 $2 "-6"
}

# function getinterfaces is used to process wildcard interfaces
getinterfaces() {
    NAME=$1
    $IP link show | grep ": $NAME" | while read L; do
        OIFS=$IFS
        IFS=" :"
        set $L
        IFS=$OIFS
        echo $2
    done
}

diff_intf() {
    func=$1
    list1=$2
    list2=$3
    cmd=$4
    for intf in $list1
    do
        echo $list2 | grep -q $intf || {
        # $vlan is absent in list 2
            $func $intf $cmd
        }
    done
}

find_program() {
  PGM=$1
  which $PGM >/dev/null 2>&1 || {
    echo "\"$PGM\" not found"
    exit 1
  }
}
check_tools() {
  find_program which
  find_program $IPTABLES
  find_program $IPTABLES_RESTORE
  find_program $IP6TABLES_RESTORE
  find_program $MODPROBE
  find_program $IP
}
reset_iptables_v4() {
  $IPTABLES -P OUTPUT  DROP
  $IPTABLES -P INPUT   DROP
  $IPTABLES -P FORWARD DROP

cat /proc/net/ip_tables_names | while read table; do
  $IPTABLES -t $table -L -n | while read c chain rest; do
      if test "X$c" = "XChain" ; then
        $IPTABLES -t $table -F $chain
      fi
  done
  $IPTABLES -t $table -X
done
}

reset_iptables_v6() {
  $IP6TABLES -P OUTPUT  DROP
  $IP6TABLES -P INPUT   DROP
  $IP6TABLES -P FORWARD DROP

cat /proc/net/ip6_tables_names | while read table; do
  $IP6TABLES -t $table -L -n | while read c chain rest; do
      if test "X$c" = "XChain" ; then
        $IP6TABLES -t $table -F $chain
      fi
  done
  $IP6TABLES -t $table -X
done
}


P2P_INTERFACE_WARNING=""

missing_address() {
    address=$1
    cmd=$2

    oldIFS=$IFS
    IFS="@"
    set $address
    addr=$1
    interface=$2
    IFS=$oldIFS



    $IP addr show dev $interface | grep -q POINTOPOINT && {
        test -z "$P2P_INTERFACE_WARNING" && echo "Warning: Can not update address of interface $interface. fwbuilder can not manage addresses of point-to-point interfaces yet"
        P2P_INTERFACE_WARNING="yes"
        return
    }

    test "$cmd" = "add" && {
      echo "# Adding ip address: $interface $addr"
      echo $addr | grep -q ':' && {
          $FWBDEBUG $IP addr $cmd $addr dev $interface
      } || {
          $FWBDEBUG $IP addr $cmd $addr broadcast + dev $interface
      }
    }

    test "$cmd" = "del" && {
      echo "# Removing ip address: $interface $addr"
      $FWBDEBUG $IP addr $cmd $addr dev $interface || exit 1
    }

    $FWBDEBUG $IP link set $interface up
}

list_addresses_by_scope() {
    interface=$1
    scope=$2
    ignore_list=$3
    $IP addr ls dev $interface | \
      awk -v IGNORED="$ignore_list" -v SCOPE="$scope" \
        'BEGIN {
           split(IGNORED,ignored_arr);
           for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;}
         }
         (/inet |inet6 / && $0 ~ SCOPE && !($2 in ignored_dict)) {print $2;}' | \
        while read addr; do
          echo "${addr}@$interface"
        done | sort
}


update_addresses_of_interface() {
    ignore_list=$2
    set $1
    interface=$1
    shift

    FWB_ADDRS=$(
      for addr in $*; do
        echo "${addr}@$interface"
      done | sort
    )

    CURRENT_ADDRS_ALL_SCOPES=""
    CURRENT_ADDRS_GLOBAL_SCOPE=""

    $IP link show dev $interface >/dev/null 2>&1 && {
      CURRENT_ADDRS_ALL_SCOPES=$(list_addresses_by_scope $interface 'scope .*' "$ignore_list")
      CURRENT_ADDRS_GLOBAL_SCOPE=$(list_addresses_by_scope $interface 'scope global' "$ignore_list")
    } || {
      echo "# Interface $interface does not exist"
      # Stop the script if we are not in test mode
      test -z "$FWBDEBUG" && exit 1
    }

    diff_intf missing_address "$FWB_ADDRS" "$CURRENT_ADDRS_ALL_SCOPES" add
    diff_intf missing_address "$CURRENT_ADDRS_GLOBAL_SCOPE" "$FWB_ADDRS" del
}

clear_addresses_except_known_interfaces() {
    $IP link show | sed 's/://g' | awk -v IGNORED="$*" \
        'BEGIN {
           split(IGNORED,ignored_arr);
           for (a in ignored_arr) {ignored_dict[ignored_arr[a]]=1;}
         }
         (/state/ && !($2 in ignored_dict)) {print $2;}' | \
         while read intf; do
            echo "# Removing addresses not configured in fwbuilder from interface $intf"
            $FWBDEBUG $IP addr flush dev $intf scope global
            $FWBDEBUG $IP link set $intf down
         done
}

check_file() {
    test -r "$2" || {
        echo "Can not find file $2 referenced by address table object $1"
        exit 1
    }
}

check_run_time_address_table_files() {
    :

}

load_modules() {
    :
    OPTS=$1
    MODULES_DIR="/lib/modules/`uname -r`/kernel/net/"
    MODULES=$(find $MODULES_DIR -name '*conntrack*' \! -name '*ipv6*'|sed  -e 's/^.*\///' -e 's/\([^\.]\)\..*/\1/')
    echo $OPTS | grep -q nat && {
        MODULES="$MODULES $(find $MODULES_DIR -name '*nat*'|sed  -e 's/^.*\///' -e 's/\([^\.]\)\..*/\1/')"
    }
    echo $OPTS | grep -q ipv6 && {
        MODULES="$MODULES $(find $MODULES_DIR -name nf_conntrack_ipv6|sed  -e 's/^.*\///' -e 's/\([^\.]\)\..*/\1/')"
    }
    for module in $MODULES; do
        if $LSMOD | grep ${module} >/dev/null; then continue; fi
        $MODPROBE ${module} ||  exit 1
    done
}

verify_interfaces() {
    :
    echo "Verifying interfaces: green red lo"
    for i in green red lo ; do
        $IP link show "$i" > /dev/null 2>&1 || {
            log "Interface $i does not exist"
            exit 1
        }
    done
}

prolog_commands() {
    echo "Running prolog script"

}

epilog_commands() {
    echo "Running epilog script"

}

run_epilog_and_exit() {
    epilog_commands
    exit $1
}

configure_interfaces() {
    :
    # Configure interfaces
}

script_body() {
    echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter


    # ================ IPv6



    (

    echo '*filter'
    # ================ Table 'filter', automatic rules
    echo :INPUT DROP [0:0]
    echo :FORWARD DROP [0:0]
    echo :OUTPUT DROP [0:0]
    # accept established sessions
    echo "-A INPUT   -m state --state ESTABLISHED,RELATED -j ACCEPT "
    echo "-A OUTPUT  -m state --state ESTABLISHED,RELATED -j ACCEPT "
    echo "-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT "
    # ================ Table 'filter', rule set Policy
    #
    # Rule  0 (lo)
    # Nötig damit sich die FW selber konfigurieren kann. Sonst sperrt sich iptable selber aus
    echo ":In_RULE_0 - [0:0]"
    echo "-A INPUT -i lo   -s ::1   -d ::1   -m state --state NEW  -j In_RULE_0 "
    echo "-A In_RULE_0  -j LOG  --log-level info --log-prefix \"RULE 0 -- ACCEPT \""
    echo "-A In_RULE_0  -j ACCEPT "
    echo ":Out_RULE_0 - [0:0]"
    echo "-A OUTPUT -o lo   -s ::1   -d ::1   -m state --state NEW  -j Out_RULE_0 "
    echo "-A Out_RULE_0  -j LOG  --log-level info --log-prefix \"RULE 0 -- ACCEPT \""
    echo "-A Out_RULE_0  -j ACCEPT "
    #
    # Rule  1 (red)
    # temp ssh
    echo ":In_RULE_1 - [0:0]"
    echo "-A INPUT -i red  -p tcp -m tcp  -d eeee:eeee:eeee:eeee::   --dport 22  -m state --state NEW  -j In_RULE_1 "
    echo "-A In_RULE_1  -j LOG  --log-level info --log-prefix \"RULE 1 -- ACCEPT \""
    echo "-A In_RULE_1  -j ACCEPT "
    #
    # Rule  2 (green,red)
    # ping ist bei ipv6 elementar. ohne ping kein internet
    # NATmitFW:Policy:2: warning: Making rule stateless because it matches ICMPv6

    echo ":In_RULE_2 - [0:0]"
    echo "-A INPUT -i green  -p ipv6-icmp  -j In_RULE_2 "
    echo "-A INPUT -i red  -p ipv6-icmp  -j In_RULE_2 "
    echo "-A FORWARD -i green  -p ipv6-icmp  -j In_RULE_2 "
    echo "-A FORWARD -i red  -p ipv6-icmp  -j In_RULE_2 "
    echo "-A In_RULE_2  -j LOG  --log-level info --log-prefix \"RULE 2 -- ACCEPT \""
    echo "-A In_RULE_2  -j ACCEPT "
    echo ":Out_RULE_2 - [0:0]"
    echo "-A OUTPUT -o green  -p ipv6-icmp  -j Out_RULE_2 "
    echo "-A OUTPUT -o red  -p ipv6-icmp  -j Out_RULE_2 "
    echo "-A FORWARD -o green  -p ipv6-icmp  -j Out_RULE_2 "
    echo "-A FORWARD -o red  -p ipv6-icmp  -j Out_RULE_2 "
    echo "-A Out_RULE_2  -j LOG  --log-level info --log-prefix \"RULE 2 -- ACCEPT \""
    echo "-A Out_RULE_2  -j ACCEPT "
    #
    # Rule  3 (green)
    # Das internet netz darf voll kommunizieren
    echo ":In_RULE_3 - [0:0]"
    echo "-A INPUT -i green   -m state --state NEW  -j In_RULE_3 "
    echo "-A FORWARD -i green   -m state --state NEW  -j In_RULE_3 "
    echo "-A In_RULE_3  -j LOG  --log-level info --log-prefix \"RULE 3 -- ACCEPT \""
    echo "-A In_RULE_3  -j ACCEPT "
    echo ":Out_RULE_3 - [0:0]"
    echo "-A OUTPUT -o green   -m state --state NEW  -j Out_RULE_3 "
    echo "-A FORWARD -o green   -m state --state NEW  -j Out_RULE_3 "
    echo "-A Out_RULE_3  -j LOG  --log-level info --log-prefix \"RULE 3 -- ACCEPT \""
    echo "-A Out_RULE_3  -j ACCEPT "
    #
    # Rule  4 (red)
    # Der server darf überall hin
    echo ":Out_RULE_4 - [0:0]"
    echo "-A OUTPUT -o red   -m state --state NEW  -j Out_RULE_4 "
    echo "-A FORWARD -o red   -m state --state NEW  -j Out_RULE_4 "
    echo "-A Out_RULE_4  -j LOG  --log-level info --log-prefix \"RULE 4 -- ACCEPT \""
    echo "-A Out_RULE_4  -j ACCEPT "
    #
    echo COMMIT



    echo '*nat'
    # ================ Table 'nat',  rule set NAT
    echo :PREROUTING ACCEPT [0:0]
    echo :POSTROUTING ACCEPT [0:0]
    echo :OUTPUT ACCEPT [0:0]
    #
    # Rule  0 (NAT)
    # von Internen Netzwerk auf die Externe IP des 2. Interfaces. (Translate Src)
    # Internal Network -> External IP
    echo "-A POSTROUTING -o red   -s eeee:eeee:eeee:eeee:eeee:eeee:eeee:0/112  -j SNAT --to-source eeee:eeee:eeee:eeee:: "
    #
    echo COMMIT



    ) | $IP6TABLES_RESTORE; IPTABLES_RESTORE_RES=$?
    test $IPTABLES_RESTORE_RES != 0 && run_epilog_and_exit $IPTABLES_RESTORE_RES



    # ================ IPv4



    (

    echo '*filter'
    # ================ Table 'filter', automatic rules
    echo :INPUT DROP [0:0]
    echo :FORWARD DROP [0:0]
    echo :OUTPUT DROP [0:0]
    # accept established sessions
    echo "-A INPUT   -m state --state ESTABLISHED,RELATED -j ACCEPT "
    echo "-A OUTPUT  -m state --state ESTABLISHED,RELATED -j ACCEPT "
    echo "-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT "
    # backup ssh access
    echo "-A INPUT  -p tcp -m tcp  -s 127.0.0.1/255.255.255.255  --dport 22  -m state --state NEW,ESTABLISHED -j  ACCEPT "
    echo "-A OUTPUT  -p tcp -m tcp  -d 127.0.0.1/255.255.255.255  --sport 22  -m state --state ESTABLISHED,RELATED -j ACCEPT "
    # ================ Table 'filter', rule set Policy
    #
    # Rule  0 (lo)
    # Nötig damit sich die FW selber konfigurieren kann. Sonst sperrt sich iptable selber aus
    echo ":In_RULE_0 - [0:0]"
    echo "-A INPUT -i lo   -s 127.0.0.1   -d 127.0.0.1   -m state --state NEW  -j In_RULE_0 "
    echo "-A In_RULE_0  -j LOG  --log-level info --log-prefix \"RULE 0 -- ACCEPT \""
    echo "-A In_RULE_0  -j ACCEPT "
    echo ":Out_RULE_0 - [0:0]"
    echo "-A OUTPUT -o lo   -s 127.0.0.1   -d 127.0.0.1   -m state --state NEW  -j Out_RULE_0 "
    echo "-A Out_RULE_0  -j LOG  --log-level info --log-prefix \"RULE 0 -- ACCEPT \""
    echo "-A Out_RULE_0  -j ACCEPT "
    #
    echo COMMIT




    ) | $IPTABLES_RESTORE; IPTABLES_RESTORE_RES=$?
    test $IPTABLES_RESTORE_RES != 0 && run_epilog_and_exit $IPTABLES_RESTORE_RES
}

ip_forward() {
    :
    echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
}

reset_all() {
    :
    reset_iptables_v4
  reset_iptables_v6
}

block_action() {
    reset_all
    # backup ssh access
    $IPTABLES -A INPUT  -p tcp -m tcp  -s 127.0.0.1/255.255.255.255  --dport 22  -m state --state NEW,ESTABLISHED -j  ACCEPT
    $IPTABLES -A OUTPUT  -p tcp -m tcp  -d 127.0.0.1/255.255.255.255  --sport 22  -m state --state ESTABLISHED,RELATED -j ACCEPT
}

stop_action() {
    reset_all
    $IPTABLES -P OUTPUT  ACCEPT
    $IPTABLES -P INPUT   ACCEPT
    $IPTABLES -P FORWARD ACCEPT
    $IP6TABLES -P OUTPUT  ACCEPT
    $IP6TABLES -P INPUT   ACCEPT
    $IP6TABLES -P FORWARD ACCEPT
}

check_iptables() {
    IP_TABLES="$1"
    [ ! -e $IP_TABLES ] && return 151
    NF_TABLES=$(cat $IP_TABLES 2>/dev/null)
    [ -z "$NF_TABLES" ] && return 152
    return 0
}
status_action() {
    check_iptables "/proc/net/ip_tables_names"
    ret_ipv4=$?
    check_iptables "/proc/net/ip6_tables_names"
    ret_ipv6=$?
    [ $ret_ipv4 -eq 0 -o $ret_ipv6 -eq 0 ] && return 0
    [ $ret_ipv4 -eq 151 -o $ret_ipv6 -eq 151 ] && {
        echo "iptables modules are not loaded"
    }
    [ $ret_ipv4 -eq 152 -o $ret_ipv6 -eq 152 ] && {
        echo "Firewall is not configured"
    }
    exit 3
}

# See how we were called.
# For backwards compatibility missing argument is equivalent to 'start'

cmd=$1
test -z "$cmd" && {
    cmd="start"
}

case "$cmd" in
    start)
        log "Activating firewall script generated Fri Feb 20 18:57:37 2015 by admin"
        check_tools
         prolog_commands
        check_run_time_address_table_files

        load_modules "nat ipv6"
        configure_interfaces
        verify_interfaces



        script_body
        ip_forward
        epilog_commands
        RETVAL=$?
        ;;

    stop)
        stop_action
        RETVAL=$?
        ;;

    status)
        status_action
        RETVAL=$?
        ;;

    block)
        block_action
        RETVAL=$?
        ;;

    reload)
        $0 stop
        $0 start
        RETVAL=$?
        ;;

    interfaces)
        configure_interfaces
        RETVAL=$?
        ;;

    test_interfaces)
        FWBDEBUG="echo"
        configure_interfaces
        RETVAL=$?
        ;;



    *)
        echo "Usage $0 [start|stop|status|block|reload|interfaces|test_interfaces]"
        ;;

esac

exit $RETVAL