cloudstack/systemvm/debian/opt/cloud/bin/configure.py

#!/usr/bin/python
# -- coding: utf-8 --
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
import base64
import logging
import os
import re
import sys
import urllib.request
import urllib.parse
import urllib.error
import time
import copy

from collections import OrderedDict
from fcntl import flock, LOCK_EX, LOCK_UN

from cs.CsDatabag import CsDataBag
from cs.CsNetfilter import CsNetfilters
from cs.CsDhcp import CsDhcp
from cs.CsRedundant import *
from cs.CsFile import CsFile
from cs.CsMonitor import CsMonitor
from cs.CsLoadBalancer import CsLoadBalancer
from cs.CsConfig import CsConfig
from cs.CsProcess import CsProcess
from cs.CsStaticRoutes import CsStaticRoutes
from cs.CsVpcGuestNetwork import CsVpcGuestNetwork

ICMPV6_TYPE_ANY = "{ destination-unreachable, packet-too-big, time-exceeded, parameter-problem, \
    echo-request, echo-reply, mld-listener-query, mld-listener-report, mld-listener-done, \
    nd-router-solicit, nd-router-advert, nd-neighbor-solicit, nd-neighbor-advert, nd-redirect, router-renumbering }"
TCP_UDP_PORT_ANY = "{ 0-65535 }"


def removeUndesiredCidrs(cidrs, version):
    version_char = ":"
    if version == 4:
        version_char = "."
    if "," in cidrs:
        cidrList = cidrs.split(",")
        ipv4Cidrs = []
        for cidr in cidrList:
            if version_char not in cidr:
                ipv4Cidrs.append(cidr)
        if len(ipv4Cidrs) > 0:
            return ",".join(ipv4Cidrs)
    else:
        if version_char not in cidrs:
            return cidrs
    return None


def appendStringIfNotEmpty(s1, s2):
    if s2:
        if not isinstance(s2, str):
            s2 = str(s2)
        if s1:
            return s1 + " " + s2
        return s2
    return s1


class CsPassword(CsDataBag):

    TOKEN_FILE = "/tmp/passwdsrvrtoken"

    def process(self):
        for item in self.dbag:
            if item == "id":
                continue
            self.__update(item, self.dbag[item])

    def __update(self, vm_ip, password):
        token = ""
        try:
            tokenFile = open(self.TOKEN_FILE)
            token = tokenFile.read()
        except IOError:
            logging.debug("File %s does not exist" % self.TOKEN_FILE)

        server_ip = None
        guest_ip = None
        for interface in self.config.address().get_interfaces():
            if interface.ip_in_subnet(vm_ip) and interface.is_added():
                if self.config.cl.is_redundant():
                    server_ip = interface.get_gateway()
                    guest_ip = interface.get_ip()
                else:
                    server_ip = interface.get_ip()
                break

        if server_ip is not None:
            if guest_ip is None:
                proc = CsProcess(['/opt/cloud/bin/passwd_server_ip.py', server_ip])
            else:
                proc = CsProcess(['/opt/cloud/bin/passwd_server_ip.py', server_ip + "," + guest_ip])
            if proc.find():
                url = "http://%s:8080/" % server_ip
                payload = {"ip": vm_ip, "password": password, "token": token}
                data = urllib.parse.urlencode(payload).encode()
                request = urllib.request.Request(url, data=data, headers={"DomU_Request": "save_password"})
                try:
                    resp = urllib.request.urlopen(request, data)
                    logging.debug("Update password server result: http:%s, content:%s" % (resp.code, resp.read()))
                except Exception as e:
                    logging.error("Failed to update password server due to: %s" % e)


class CsAcl(CsDataBag):
    """
        Deal with Network acls
    """

    class AclIP():
        """ For type Virtual Router """

        def __init__(self, obj, fw):
            self.fw = fw.get_fw()
            self.direction = 'egress'
            if obj['traffic_type'] == 'Ingress':
                self.direction = 'ingress'
            self.device = ''
            self.ip = obj['src_ip']
            self.rule = obj
            self.rule['type'] = obj['protocol']
            # src_port_range
            if 'src_port_range' in obj:
                self.rule['first_port'] = obj['src_port_range'][0]
                self.rule['last_port'] = obj['src_port_range'][1]

            self.rule['allowed'] = True
            self.rule['action'] = "ACCEPT"

            if self.rule['type'] == 'all' and not obj['source_cidr_list']:
                self.rule['cidr'] = []
            else:
                self.rule['cidr'] = obj['source_cidr_list']

            if self.direction == 'egress':
                try:
                    if not obj['dest_cidr_list']:
                        self.rule['dcidr'] = []
                    else:
                        self.rule['dcidr'] = obj['dest_cidr_list']
                except Exception:
                    self.rule['dcidr'] = []

            logging.debug("AclIP created for rule ==> %s", self.rule)

        def create(self):
            self.add_rule()

        def add_rule(self):
            CIDR_ALL = '0.0.0.0/0'
            icmp_type = ''
            rule = self.rule
            icmp_type = "any"
            if "icmp_type" in list(self.rule.keys()) and self.rule['icmp_type'] != -1:
                icmp_type = self.rule['icmp_type']
            if "icmp_code" in list(self.rule.keys()) and rule['icmp_code'] != -1:
                icmp_type = "%s/%s" % (self.rule['icmp_type'], self.rule['icmp_code'])
            rnge = ''
            if "first_port" in list(self.rule.keys()) and \
               self.rule['first_port'] == self.rule['last_port']:
                rnge = " --dport %s " % self.rule['first_port']
            if "first_port" in list(self.rule.keys()) and \
               self.rule['first_port'] != self.rule['last_port']:
                rnge = " --dport %s:%s" % (rule['first_port'], rule['last_port'])

            logging.debug("Current ACL IP direction is ==> %s", self.direction)

            if self.direction == 'ingress':
                for cidr in self.rule['cidr']:
                    action = self.rule['action']
                    if action == "ACCEPT":
                        action = "RETURN"
                    if rule['protocol'] == "icmp":
                        self.fw.append(["mangle", "front",
                                        " -A FIREWALL_%s" % self.ip +
                                        " -s %s " % cidr +
                                        " -p %s " % rule['protocol'] +
                                        " --icmp-type %s -j %s" % (icmp_type, action)])
                    else:
                        self.fw.append(["mangle", "front",
                                        " -A FIREWALL_%s" % self.ip +
                                        " -s %s " % cidr +
                                        " -p %s " % rule['protocol'] +
                                        " -m %s " % rule['protocol'] +
                                        "  %s -j %s" % (rnge, action)])

            sflag = False
            dflag = False
            if self.direction == 'egress':
                ruleId = self.rule['id']
                sourceIpsetName = 'sourceCidrIpset-%d' % ruleId
                destIpsetName = 'destCidrIpset-%d' % ruleId

                # Create source cidr ipset
                srcIpset = 'ipset create '+sourceIpsetName + ' hash:net '
                dstIpset = 'ipset create '+destIpsetName + ' hash:net '

                CsHelper.execute(srcIpset)
                CsHelper.execute(dstIpset)
                for cidr in self.rule['cidr']:
                    ipsetAddCmd = 'ipset add ' + sourceIpsetName + ' ' + cidr
                    CsHelper.execute(ipsetAddCmd)
                    sflag = True

                logging.debug("egress   rule  ####==> %s", self.rule)
                for cidr in self.rule['dcidr']:
                    if cidr == CIDR_ALL:
                        continue
                    ipsetAddCmd = 'ipset add ' + destIpsetName + ' ' + cidr
                    CsHelper.execute(ipsetAddCmd)
                    dflag = True

                self.fw.append(["filter", "", " -A FW_OUTBOUND -j FW_EGRESS_RULES"])

                fwr = " -I FW_EGRESS_RULES"
                # In case we have a default rule (accept all or drop all), we have to evaluate the action again.
                if rule['type'] == 'all' and not rule['source_cidr_list']:
                    fwr = " -A FW_EGRESS_RULES"
                    # For default egress ALLOW or DENY, the logic is inverted.
                    # Having default_egress_policy == True, means that the default rule should have ACCEPT,
                    # otherwise DROP. The rule should be appended, not inserted.
                    if self.rule['default_egress_policy']:
                        self.rule['action'] = "ACCEPT"
                    else:
                        self.rule['action'] = "DROP"
                else:
                    # For other rules added, if default_egress_policy == True, following rules should be DROP,
                    # otherwise ACCEPT
                    if self.rule['default_egress_policy']:
                        self.rule['action'] = "DROP"
                    else:
                        self.rule['action'] = "ACCEPT"

                egressIpsetStr = ''
                if sflag and dflag:
                    egressIpsetStr = " -m set --match-set %s src " % sourceIpsetName + \
                                     " -m set --match-set %s dst " % destIpsetName
                elif sflag:
                    egressIpsetStr = " -m set --match-set %s src " % sourceIpsetName
                elif dflag:
                    egressIpsetStr = " -m set --match-set %s dst " % destIpsetName

                if rule['protocol'] == "icmp":
                    fwr += egressIpsetStr + " -p %s " % rule['protocol'] + " -m %s " % rule['protocol'] + \
                                     " --icmp-type %s" % icmp_type
                elif rule['protocol'] != "all":
                    fwr += egressIpsetStr + " -p %s " % rule['protocol'] + " -m %s " % rule['protocol'] + \
                                     " %s" % rnge
                elif rule['protocol'] == "all":
                    fwr += egressIpsetStr

                self.fw.append(["filter", "", "%s -j %s" % (fwr, rule['action'])])
                logging.debug("EGRESS rule configured for protocol ==> %s, action ==> %s", rule['protocol'], rule['action'])

    class AclDevice():
        """ A little class for each list of acls per device """

        FIXED_RULES_INGRESS = 3
        FIXED_RULES_EGRESS = 3

        def __init__(self, obj, config):
            self.ingess = []
            self.egress = []
            self.device = obj['device']
            self.ip = obj['nic_ip']
            self.ip6_cidr = None
            if "nic_ip6_cidr" in list(obj.keys()):
                self.ip6_cidr = obj['nic_ip6_cidr']
            self.netmask = obj['nic_netmask']
            self.config = config
            self.cidr = "%s/%s" % (self.ip, self.netmask)
            if "ingress_rules" in list(obj.keys()):
                self.ingress = obj['ingress_rules']
            if "egress_rules" in list(obj.keys()):
                self.egress = obj['egress_rules']
            self.fw = config.get_fw()
            self.ipv6_acl = config.get_ipv6_acl()

        def create(self):
            self.process("ingress", self.ingress, self.FIXED_RULES_INGRESS)
            self.process("egress", self.egress, self.FIXED_RULES_EGRESS)

        def __process_ip6(self, direction, rule_list):
            if not self.ip6_cidr:
                return
            tier_cidr = self.ip6_cidr
            chain = "%s_%s_policy" % (self.device, direction)
            parent_chain = "acl_forward"
            cidr_key = "saddr"
            if direction == "ingress":
                cidr_key = "daddr"
            parent_chain_rule = "ip6 %s %s jump %s" % (cidr_key, tier_cidr, chain)
            self.ipv6_acl.insert(0, {'type': "", 'chain': parent_chain, 'rule': parent_chain_rule})
            self.ipv6_acl.insert(0, {'type': "chain", 'chain': chain})
            for rule in rule_list:
                cidr = rule['cidr']
                if cidr is not None and cidr != "":
                    cidr = removeUndesiredCidrs(cidr, 4)
                    if cidr is None or cidr == "":
                        continue
                addr = ""
                if cidr:
                    addr = "ip6 daddr " + cidr
                    if direction == "ingress":
                        addr = "ip6 saddr " + cidr

                proto = ""
                protocol = rule['type']
                if protocol != "all":
                    icmp_type = ""
                    if protocol == "protocol":
                        protocol = "ip6 nexthdr %d" % rule['protocol']
                    proto = protocol
                    if proto == "icmp":
                        proto = proto_str = "icmpv6"
                        icmp_type = ICMPV6_TYPE_ANY
                        if 'icmp_type' in rule and rule['icmp_type'] != -1:
                            icmp_type = str(rule['icmp_type'])
                        proto = "%s type %s" % (proto_str, icmp_type)
                        if 'icmp_code' in rule and rule['icmp_code'] != -1:
                            proto = "%s %s code %d" % (proto, proto_str, rule['icmp_code'])

                    first_port = ""
                    last_port = ""
                    if 'first_port' in rule:
                        first_port = rule['first_port']
                    if 'last_port' in rule:
                        last_port = rule['last_port']
                    port = ""
                    if first_port:
                        port = first_port
                    if last_port and port and \
                       last_port != first_port:
                        port = "{%s-%s}" % (port, last_port)
                    if (protocol == "tcp" or protocol == "udp") and not port:
                        port = TCP_UDP_PORT_ANY
                    if port:
                        proto = "%s dport %s" % (proto, port)

                action = "drop"
                if 'allowed' in list(rule.keys()) and rule['allowed']:
                    action = "accept"

                rstr = addr
                type = ""
                rstr = appendStringIfNotEmpty(rstr, proto)
                if rstr and action:
                    rstr = rstr + " " + action
                else:
                    type = "chain"
                    rstr = action
                logging.debug("Process IPv6 ACL rule %s" % rstr)
                if type == "chain":
                    self.ipv6_acl.insert(0, {'type': type, 'chain': chain, 'rule': rstr})
                else:
                    self.ipv6_acl.append({'type': type, 'chain': chain, 'rule': rstr})
            rstr = "counter packets 0 bytes 0 drop"
            self.ipv6_acl.append({'type': "", 'chain': chain, 'rule': rstr})

        def process(self, direction, rule_list, base):
            count = base
            for i in rule_list:
                ruleData = copy.copy(i)
                cidr = ruleData['cidr']
                if cidr is not None and cidr != "":
                    cidr = removeUndesiredCidrs(cidr, 6)
                    if cidr is None or cidr == "":
                        continue
                ruleData['cidr'] = cidr
                r = self.AclRule(direction, self, ruleData, self.config, count)
                r.create()
                count += 1

            # Prepare IPv6 ACL rules
            self.__process_ip6(direction, rule_list)

        class AclRule():

            def __init__(self, direction, acl, rule, config, count):
                self.count = count
                if config.is_vpc():
                    self.init_vpc(direction, acl, rule, config)

            def init_vpc(self, direction, acl, rule, config):
                self.table = ""
                self.device = acl.device
                self.direction = direction
                # acl is an object of the AclDevice type. So, its fw attribute is already a list.
                self.fw = acl.fw
                self.chain = config.get_ingress_chain(self.device, acl.ip)
                self.dest = "-s %s" % rule['cidr']
                if direction == "egress":
                    self.table = config.get_egress_table()
                    self.chain = config.get_egress_chain(self.device, acl.ip)
                    self.dest = "-d %s" % rule['cidr']
                self.type = ""
                self.type = rule['type']
                self.icmp_type = "any"
                self.protocol = self.type
                if "icmp_type" in list(rule.keys()) and rule['icmp_type'] != -1:
                    self.icmp_type = rule['icmp_type']
                if "icmp_code" in list(rule.keys()) and rule['icmp_code'] != -1:
                    self.icmp_type = "%s/%s" % (self.icmp_type, rule['icmp_code'])
                if self.type == "protocol":
                    if rule['protocol'] == 41:
                        rule['protocol'] = "ipv6"
                    self.protocol = rule['protocol']
                self.action = "DROP"
                self.dport = ""
                if 'allowed' in list(rule.keys()) and rule['allowed']:
                    self.action = "ACCEPT"
                if 'first_port' in list(rule.keys()):
                    self.dport = "-m %s --dport %s" % (self.protocol, rule['first_port'])
                if 'last_port' in list(rule.keys()) and self.dport and \
                   rule['last_port'] != rule['first_port']:
                    self.dport = "%s:%s" % (self.dport, rule['last_port'])

            def create(self):
                rstr = ""
                rstr = "%s -A %s -p %s %s" % (rstr, self.chain, self.protocol, self.dest)
                if self.type == "icmp":
                    rstr = "%s -m icmp --icmp-type %s" % (rstr, self.icmp_type)
                rstr = "%s %s -j %s" % (rstr, self.dport, self.action)
                rstr = rstr.replace("  ", " ").lstrip()
                self.fw.append([self.table, self.count, rstr])

    def flushAllowAllEgressRules(self):
        logging.debug("Flush allow 'all' egress firewall rule")
        # Ensure that FW_EGRESS_RULES chain exists
        CsHelper.execute("iptables-save | grep '^:FW_EGRESS_RULES' || iptables -t filter -N FW_EGRESS_RULES")
        CsHelper.execute("iptables-save | grep '^-A FW_EGRESS_RULES -j ACCEPT$' | sed 's/^-A/iptables -t filter -D/g' | bash")
        CsHelper.execute("iptables -F FW_EGRESS_RULES")
        CsHelper.execute("ipset -L | grep Name:  | awk {'print $2'} | ipset flush")
        CsHelper.execute("ipset -L | grep Name:  | awk {'print $2'} | ipset destroy")

    def flushAllIpv6Rules(self):
        logging.info("Flush all IPv6 ACL rules")
        address_family = 'ip6'
        table = 'ip6_acl'
        tables = CsHelper.execute("nft list tables %s | grep %s" % (address_family, table))
        if any(table in t for t in tables):
            CsHelper.execute("nft delete table %s %s" % (address_family, table))

    def process(self):
        for item in self.dbag:
            if item == "id":
                continue
            if self.config.is_vpc():
                self.AclDevice(self.dbag[item], self.config).create()
            else:
                self.AclIP(self.dbag[item], self.config).create()


class CsIpv6Firewall(CsDataBag):
    """
        Deal with IPv6 Firewall
    """

    def flushAllRules(self):
        logging.info("Flush all IPv6 firewall rules")
        address_family = 'ip6'
        table = 'ip6_firewall'
        tables = CsHelper.execute("nft list tables %s | grep %s" % (address_family, table))
        if any(table in t for t in tables):
            CsHelper.execute("nft delete table %s %s" % (address_family, table))

    def process(self):
        fw = self.config.get_ipv6_fw()
        logging.info("Processing IPv6 firewall rules %s; %s" % (self.dbag, fw))
        chains_added = False
        egress_policy = None
        for item in self.dbag:
            if item == "id":
                continue
            rule = self.dbag[item]

            if chains_added is False:
                guest_cidr = rule['guest_ip6_cidr']
                parent_chain = "fw_forward"
                chain = "fw_chain_egress"
                parent_chain_rule = "ip6 saddr %s jump %s" % (guest_cidr, chain)
                fw.append({'type': "chain", 'chain': chain})
                fw.append({'type': "", 'chain': parent_chain, 'rule': parent_chain_rule})
                chain = "fw_chain_ingress"
                parent_chain_rule = "ip6 daddr %s jump %s" % (guest_cidr, chain)
                fw.append({'type': "chain", 'chain': chain})
                fw.append({'type': "", 'chain': parent_chain, 'rule': parent_chain_rule})
                if rule['default_egress_policy']:
                    egress_policy = "accept"
                else:
                    egress_policy = "drop"
                chains_added = True

            rstr = ""

            chain = "fw_chain_ingress"
            if 'traffic_type' in rule and rule['traffic_type'].lower() == "egress":
                chain = "fw_chain_egress"

            saddr = ""
            if 'source_cidr_list' in rule and len(rule['source_cidr_list']) > 0:
                source_cidrs = rule['source_cidr_list']
                if len(source_cidrs) == 1:
                    source_cidrs = source_cidrs[0]
                else:
                    source_cidrs = "{" + (",".join(source_cidrs)) + "}"
                saddr = "ip6 saddr " + source_cidrs
            daddr = ""
            if 'dest_cidr_list' in rule and len(rule['dest_cidr_list']) > 0:
                dest_cidrs = rule['dest_cidr_list']
                if len(dest_cidrs) == 1:
                    dest_cidrs = dest_cidrs[0]
                else:
                    dest_cidrs = "{" + (",".join(dest_cidrs)) + "}"
                daddr = "ip6 daddr " + dest_cidrs

            proto = ""
            protocol = rule['protocol']
            if protocol != "all":
                icmp_type = ""
                proto = protocol
                if proto == "icmp":
                    proto = proto_str = "icmpv6"
                    icmp_type = ICMPV6_TYPE_ANY
                    if 'icmp_type' in rule and rule['icmp_type'] != -1:
                        icmp_type = str(rule['icmp_type'])
                    proto = "%s type %s" % (proto_str, icmp_type)
                    if 'icmp_code' in rule and rule['icmp_code'] != -1:
                        proto = "%s %s code %d" % (proto, proto_str, rule['icmp_code'])
                first_port = ""
                last_port = ""
                if 'src_port_range' in rule:
                    first_port = rule['src_port_range'][0]
                    last_port = rule['src_port_range'][1]
                port = ""
                if first_port:
                    port = first_port
                if last_port and port and \
                   last_port != first_port:
                    port = "{%s-%s}" % (port, last_port)
                if (protocol == "tcp" or protocol == "udp") and not port:
                    port = TCP_UDP_PORT_ANY
                if port:
                    proto = "%s dport %s" % (proto, port)

            action = "accept"
            if chain == "fw_chain_egress":
                # In case we have a default rule (accept all or drop all), we have to evaluate the action again.
                if protocol == 'all' and not rule['source_cidr_list']:
                    # For default egress ALLOW or DENY, the logic is inverted.
                    # Having default_egress_policy == True, means that the default rule should have ACCEPT,
                    # otherwise DROP. The rule should be appended, not inserted.
                    if rule['default_egress_policy']:
                        action = "accept"
                    else:
                        action = "drop"
                else:
                    # For other rules added, if default_egress_policy == True, following rules should be DROP,
                    # otherwise ACCEPT
                    if rule['default_egress_policy']:
                        action = "drop"
                    else:
                        action = "accept"

            rstr = saddr
            type = ""
            rstr = appendStringIfNotEmpty(rstr, daddr)
            rstr = appendStringIfNotEmpty(rstr, proto)
            if rstr and action:
                rstr = rstr + " " + action
                logging.debug("Process IPv6 firewall rule %s" % rstr)
                fw.append({'type': type, 'chain': chain, 'rule': rstr})
        if chains_added:
            base_rstr = "counter packets 0 bytes 0"
            rstr = "%s drop" % base_rstr
            fw.append({'type': "", 'chain': "fw_chain_ingress", 'rule': rstr})
            rstr = "%s %s" % (base_rstr, egress_policy)
            fw.append({'type': "", 'chain': "fw_chain_egress", 'rule': rstr})


class CsVmMetadata(CsDataBag):

    def process(self):
        for ip in self.dbag:
            if ("id" == ip):
                continue
            logging.info("Processing metadata for %s" % ip)
            for item in self.dbag[ip]:
                folder = item[0]
                file = item[1]
                data = item[2]

                # process only valid data
                if folder != "userdata" and folder != "metadata":
                    continue

                if file == "":
                    continue

                self.__htaccess(ip, folder, file)

                if data == "":
                    self.__deletefile(ip, folder, file)
                else:
                    self.__createfile(ip, folder, file, data)

    def __deletefile(self, ip, folder, file):
        datafile = "/var/www/html/" + folder + "/" + ip + "/" + file

        if os.path.exists(datafile):
            os.remove(datafile)

    def __createfile(self, ip, folder, file, data):
        dest = "/var/www/html/" + folder + "/" + ip + "/" + file
        metamanifestdir = "/var/www/html/" + folder + "/" + ip
        metamanifest = metamanifestdir + "/meta-data"

        # base64 decode userdata
        if folder == "userdata" or folder == "user-data":
            if data is not None:
                # need to pad data if it is not valid base 64
                if len(data) % 4 != 0:
                    data += (4 - (len(data) % 4)) * "="
                data = base64.b64decode(data)

        fh = open(dest, "w")
        self.__exflock(fh)
        if data is not None:
            if isinstance(data, str):
                fh.write(data)
            elif isinstance(data, bytes):
                fh.write(data.decode())
        else:
            fh.write("")
        self.__unflock(fh)
        fh.close()
        os.chmod(dest, 0o644)

        if folder == "metadata" or folder == "meta-data":
            try:
                os.makedirs(metamanifestdir, 0o755)
            except OSError as e:
                # error 17 is already exists, we do it this way for concurrency
                if e.errno != 17:
                    print("failed to make directories " + metamanifestdir + " due to :" + e.strerror)
                    sys.exit(1)
            if os.path.exists(metamanifest):
                fh = open(metamanifest, "a+")
                self.__exflock(fh)
                if file not in fh.read():
                    fh.write(file + '\n')
                self.__unflock(fh)
                fh.close()
            else:
                fh = open(metamanifest, "w")
                self.__exflock(fh)
                fh.write(file + '\n')
                self.__unflock(fh)
                fh.close()

        if os.path.exists(metamanifest):
            os.chmod(metamanifest, 0o644)

    def __htaccess(self, ip, folder, file):
        entry = "RewriteRule ^" + file + "$  ../" + folder + "/%{REMOTE_ADDR}/" + file + " [L,NC,QSA]"
        htaccessFolder = "/var/www/html/latest"
        htaccessFile = htaccessFolder + "/.htaccess"

        CsHelper.mkdir(htaccessFolder, 0o755, True)

        if os.path.exists(htaccessFile):
            fh = open(htaccessFile, "a+")
            self.__exflock(fh)
            if entry not in fh.read():
                fh.write(entry + '\n')
            self.__unflock(fh)
            fh.close()
        else:
            fh = open(htaccessFile, "w")
            self.__exflock(fh)
            fh.write("Options +FollowSymLinks\nRewriteEngine On\n\n")
            fh.write(entry + '\n')
            self.__unflock(fh)
            fh.close()

        entry = "Options -Indexes\nOrder Deny,Allow\nDeny from all\nAllow from " + ip
        htaccessFolder = "/var/www/html/" + folder + "/" + ip
        htaccessFile = htaccessFolder+"/.htaccess"

        try:
            os.makedirs(htaccessFolder, 0o755)
        except OSError as e:
            # error 17 is already exists, we do it this way for sake of concurrency
            if e.errno != 17:
                print("failed to make directories " + htaccessFolder + " due to :" + e.strerror)
                sys.exit(1)

        fh = open(htaccessFile, "w")
        self.__exflock(fh)
        fh.write(entry + '\n')
        self.__unflock(fh)
        fh.close()

        if folder == "metadata" or folder == "meta-data":
            entry = "RewriteRule ^meta-data/(.+)$  ../" + folder + "/%{REMOTE_ADDR}/$1 [L,NC,QSA]"
            htaccessFolder = "/var/www/html/latest"
            htaccessFile = htaccessFolder + "/.htaccess"

            fh = open(htaccessFile, "a+")
            self.__exflock(fh)
            if entry not in fh.read():
                fh.write(entry + '\n')

            entry = "RewriteRule ^meta-data/$  ../" + folder + "/%{REMOTE_ADDR}/meta-data [L,NC,QSA]"

            fh.seek(0)
            if entry not in fh.read():
                fh.write(entry + '\n')
            self.__unflock(fh)
            fh.close()

    def __exflock(self, file):
        try:
            flock(file, LOCK_EX)
        except IOError as e:
            print("failed to lock file" + file.name + " due to : " + e.strerror)
            sys.exit(1)  # FIXME
        return True

    def __unflock(self, file):
        try:
            flock(file, LOCK_UN)
        except IOError as e:
            print("failed to unlock file" + file.name + " due to : " + e.strerror)
            sys.exit(1)  # FIXME
        return True


class CsSite2SiteVpn(CsDataBag):
    """
    Setup any configured vpns (using swan)
    left is the local machine
    right is where the clients connect from
    """

    VPNCONFDIR = "/etc/ipsec.d"

    def process(self):
        self.confips = []
        # collect a list of configured vpns
        for file in os.listdir(self.VPNCONFDIR):
            m = re.search("^ipsec.vpn-(.*).conf", file)
            if m:
                self.confips.append(m.group(1))

        for vpn in self.dbag:
            if vpn == "id":
                continue

            local_ip = self.dbag[vpn]['local_public_ip']
            dev = CsHelper.get_device(local_ip)

            if dev == "":
                logging.error("Request for ipsec to %s not possible because ip is not configured", local_ip)
                continue

            CsHelper.start_if_stopped("ipsec")
            self.configure_iptables(dev, self.dbag[vpn])
            self.configure_ipsec(self.dbag[vpn])

        # Delete vpns that are no longer in the configuration
        for ip in self.confips:
            self.deletevpn(ip)

    def deletevpn(self, ip):
        logging.info("Removing VPN configuration for %s", ip)
        CsHelper.execute("ipsec down vpn-%s" % ip)
        CsHelper.execute("ipsec down vpn-%s" % ip)
        vpnconffile = "%s/ipsec.vpn-%s.conf" % (self.VPNCONFDIR, ip)
        vpnsecretsfile = "%s/ipsec.vpn-%s.secrets" % (self.VPNCONFDIR, ip)
        os.remove(vpnconffile)
        os.remove(vpnsecretsfile)
        CsHelper.execute("ipsec reload")

    def configure_iptables(self, dev, obj):
        self.fw.append(["", "front", "-A INPUT -i %s -p udp -m udp --dport 500 -s %s -d %s -j ACCEPT" % (dev, obj['peer_gateway_ip'], obj['local_public_ip'])])
        self.fw.append(["", "front", "-A INPUT -i %s -p udp -m udp --dport 4500 -s %s -d %s -j ACCEPT" % (dev, obj['peer_gateway_ip'], obj['local_public_ip'])])
        self.fw.append(["", "front", "-A INPUT -i %s -p esp -s %s -d %s -j ACCEPT" % (dev, obj['peer_gateway_ip'], obj['local_public_ip'])])
        self.fw.append(["nat", "front", "-A POSTROUTING -t nat -o %s -m mark --mark 0x525 -j ACCEPT" % dev])
        for net in obj['peer_guest_cidr_list'].lstrip().rstrip().split(','):
            self.fw.append(["mangle", "front",
                            "-A FORWARD -s %s -d %s -j MARK --set-xmark 0x525/0xffffffff" % (obj['local_guest_cidr'], net)])
            self.fw.append(["mangle", "",
                            "-A OUTPUT -s %s -d %s -j MARK --set-xmark 0x525/0xffffffff" % (obj['local_guest_cidr'], net)])
            self.fw.append(["mangle", "front",
                            "-A FORWARD -s %s -d %s -j MARK --set-xmark 0x524/0xffffffff" % (net, obj['local_guest_cidr'])])
            self.fw.append(["mangle", "",
                            "-A INPUT -s %s -d %s -j MARK --set-xmark 0x524/0xffffffff" % (net, obj['local_guest_cidr'])])

    def configure_ipsec(self, obj):
        leftpeer = obj['local_public_ip']
        rightpeer = obj['peer_gateway_ip']
        peerlist = obj['peer_guest_cidr_list'].replace(' ', '')
        vpnconffile = "%s/ipsec.vpn-%s.conf" % (self.VPNCONFDIR, rightpeer)
        vpnsecretsfile = "%s/ipsec.vpn-%s.secrets" % (self.VPNCONFDIR, rightpeer)
        ikepolicy = obj['ike_policy'].replace(';', '-')
        esppolicy = obj['esp_policy'].replace(';', '-')
        splitconnections = obj['split_connections'] if 'split_connections' in obj else False
        ikeversion = obj['ike_version'] if 'ike_version' in obj and obj['ike_version'].lower() in ('ike', 'ikev1', 'ikev2') else 'ike'

        peerlistarr = peerlist.split(',')
        if splitconnections:
            logging.debug('Splitting rightsubnets %s' % peerlistarr)
            peerlist = peerlistarr[0]

        if rightpeer in self.confips:
            self.confips.remove(rightpeer)
        file = CsFile(vpnconffile)
        file.repopulate()  # This avoids issues when switching off split_connections or removing subnets with split_connections == true
        file.add("#conn for vpn-%s" % rightpeer, 0)
        file.search("conn ", "conn vpn-%s" % rightpeer)
        file.addeq(" left=%s" % leftpeer)
        file.addeq(" leftsubnet=%s" % obj['local_guest_cidr'])
        file.addeq(" right=%s" % rightpeer)
        file.addeq(" rightsubnet=%s" % peerlist)
        file.addeq(" type=tunnel")
        file.addeq(" authby=secret")
        file.addeq(" keyexchange=%s" % ikeversion)
        file.addeq(" ike=%s" % ikepolicy)
        file.addeq(" ikelifetime=%s" % self.convert_sec_to_min(obj['ike_lifetime']))
        file.addeq(" esp=%s" % esppolicy)
        file.addeq(" lifetime=%s" % self.convert_sec_to_min(obj['esp_lifetime']))
        file.addeq(" keyingtries=2")
        file.addeq(" auto=route")
        if 'encap' not in obj:
            obj['encap'] = False
        file.addeq(" forceencaps=%s" % CsHelper.bool_to_yn(obj['encap']))
        if obj['dpd']:
            file.addeq(" dpddelay=30")
            file.addeq(" dpdtimeout=120")
            file.addeq(" dpdaction=restart")
        if splitconnections and peerlistarr.count > 1:
            logging.debug('Splitting connections for rightsubnets %s' % peerlistarr)
            for peeridx in range(1, len(peerlistarr)):
                logging.debug('Adding split connection -%d for subnet %s' % (peeridx + 1, peerlistarr[peeridx]))
                file.append('')
                file.search('conn vpn-.*-%d' % (peeridx + 1), "conn vpn-%s-%d" % (rightpeer, peeridx + 1))
                file.append(' also=vpn-%s' % rightpeer)
                file.append(' rightsubnet=%s' % peerlistarr[peeridx])
        secret = CsFile(vpnsecretsfile)
        secret.search("%s " % leftpeer, "%s %s : PSK \"%s\"" % (leftpeer, rightpeer, obj['ipsec_psk']))
        if secret.is_changed() or file.is_changed():
            secret.commit()
            file.commit()
            logging.info("Configured vpn %s %s", leftpeer, rightpeer)
            CsHelper.execute("ipsec rereadsecrets")

        # This will load the new config
        CsHelper.execute("ipsec reload")
        os.chmod(vpnsecretsfile, 0o400)

        for i in range(3):
            done = True
            for peeridx in range(0, len(peerlistarr)):
                # Check for the proper connection and subnet
                conn = rightpeer if not splitconnections else rightpeer if peeridx == 0 else '%s-%d' % (rightpeer, peeridx + 1)
                result = CsHelper.execute('ipsec status vpn-%s | grep "%s"' % (conn, peerlistarr[peeridx]))
                # If any of the peers hasn't yet finished, continue the outer loop
                if len(result) == 0:
                    done = False
            if done:
                break
            time.sleep(1)

        # With 'auto=route', connections are established on an attempt to
        # communicate over the S2S VPN. This uses ping to initialize the connection.
        for peer in peerlistarr:
            octets = peer.split('/', 1)[0].split('.')
            octets[3] = str((int(octets[3]) + 1))
            ipinsubnet = '.'.join(octets)
            CsHelper.execute("timeout 5 ping -c 3 %s" % ipinsubnet)

    def convert_sec_to_min(self, val):
        mins = int(val / 60)
        return "%sm" % mins


class CsVpnUser(CsDataBag):
    PPP_CHAP = '/etc/ppp/chap-secrets'

    def process(self):
        for user in self.dbag:
            if user == 'id':
                continue

            userconfig = self.dbag[user]
            if userconfig['add']:
                self.add_l2tp_ipsec_user(user, userconfig)
            else:
                self.del_l2tp_ipsec_user(user, userconfig)

    def add_l2tp_ipsec_user(self, user, obj):
        userfound = False
        password = obj['password']

        userAddEntry = "%s * %s *" % (user, password)
        logging.debug("Adding vpn user '%s'" % user)

        file = CsFile(self.PPP_CHAP)
        userfound = file.searchString(userAddEntry, '#')
        if not userfound:
            logging.debug("User is not there already, so adding user")
            self.del_l2tp_ipsec_user(user, obj)
            file.add(userAddEntry)
        file.commit()

    def del_l2tp_ipsec_user(self, user, obj):
        userfound = False
        password = obj['password']
        userentry = "%s * %s *" % (user, password)

        logging.debug("Deleting the user '%s'" % user)
        file = CsFile(self.PPP_CHAP)
        file.deleteLine(userentry)
        file.commit()

        if not os.path.exists('/var/run/pppd2.tdb'):
            return

        logging.debug("killing the PPPD process for the user '%s'" % user)

        fileContents = CsHelper.execute("tdbdump /var/run/pppd2.tdb")
        for line in fileContents:
            if user in line:
                contentlist = line.split(';')
                for str in contentlist:
                    pppd = str.split('=')[0]
                    if pppd == 'PPPD_PID':
                        pid = str.split('=')[1]
                        if pid:
                            logging.debug("killing process %s" % pid)
                            CsHelper.execute('kill -9 %s' % pid)


class CsRemoteAccessVpn(CsDataBag):
    VPNCONFDIR = "/etc/ipsec.d"

    def process(self):
        self.confips = []

        logging.debug(self.dbag)

        for public_ip in self.dbag:
            if public_ip == "id":
                continue
            vpnconfig = self.dbag[public_ip]

            # Enable remote access vpn
            if vpnconfig['create']:
                logging.debug("Enabling remote access vpn on " + public_ip)

                CsHelper.start_if_stopped("ipsec")
                self.configure_l2tpIpsec(public_ip, self.dbag[public_ip])
                logging.debug("Remote accessvpn  data bag %s",  self.dbag)
                self.remoteaccessvpn_iptables(public_ip, self.dbag[public_ip])

                CsHelper.execute("ipsec update")
                CsHelper.execute("systemctl start xl2tpd")
                CsHelper.execute("ipsec rereadsecrets")
            else:
                logging.debug("Disabling remote access vpn .....")
                CsHelper.execute("ipsec down L2TP-PSK")
                CsHelper.execute("systemctl stop xl2tpd")

    def configure_l2tpIpsec(self, left, obj):
        l2tpconffile = "%s/l2tp.conf" % (self.VPNCONFDIR)
        vpnsecretfilte = "%s/ipsec.any.secrets" % (self.VPNCONFDIR)
        xl2tpdconffile = "/etc/xl2tpd/xl2tpd.conf"
        xl2tpoptionsfile = "/etc/ppp/options.xl2tpd"

        localip = obj['local_ip']
        localcidr = obj['local_cidr']
        publicIface = obj['public_interface']
        iprange = obj['ip_range']
        psk = obj['preshared_key']

        # Left
        l2tpfile = CsFile(l2tpconffile)
        l2tpfile.addeq(" left=%s" % left)
        l2tpfile.commit()

        secret = CsFile(vpnsecretfilte)
        secret.empty()
        secret.addeq(": PSK \"%s\"" % (psk))
        secret.commit()

        xl2tpdconf = CsFile(xl2tpdconffile)
        xl2tpdconf.addeq("ip range = %s" % iprange)
        xl2tpdconf.addeq("local ip = %s" % localip)
        xl2tpdconf.commit()

        xl2tpoptions = CsFile(xl2tpoptionsfile)
        xl2tpoptions.search("ms-dns ", "ms-dns %s" % localip)
        xl2tpoptions.commit()

    def remoteaccessvpn_iptables(self, publicip, obj):
        publicdev = obj['public_interface']
        localcidr = obj['local_cidr']
        local_ip = obj['local_ip']

        self.fw.append(["", "", "-A INPUT -i %s --dst %s -p udp -m udp --dport 500 -j ACCEPT" % (publicdev, publicip)])
        self.fw.append(["", "", "-A INPUT -i %s --dst %s -p udp -m udp --dport 4500 -j ACCEPT" % (publicdev, publicip)])
        self.fw.append(["", "", "-A INPUT -i %s --dst %s -p udp -m udp --dport 1701 -j ACCEPT" % (publicdev, publicip)])
        self.fw.append(["", "", "-A INPUT -i %s -p ah -j ACCEPT" % publicdev])
        self.fw.append(["", "", "-A INPUT -i %s -p esp -j ACCEPT" % publicdev])
        self.fw.append(["", "", "-A OUTPUT -p ah -j ACCEPT"])
        self.fw.append(["", "", "-A OUTPUT -p esp -j ACCEPT"])

        if self.config.is_vpc():
            self.fw.append(["", "", " -N VPN_FORWARD"])
            self.fw.append(["", "", "-I FORWARD -i ppp+ -j VPN_FORWARD"])
            self.fw.append(["", "", "-I FORWARD -o ppp+ -j VPN_FORWARD"])
            self.fw.append(["", "", "-I FORWARD -o ppp+ -j VPN_FORWARD"])
            self.fw.append(["", "", "-A VPN_FORWARD -s  %s -j RETURN" % localcidr])
            self.fw.append(["", "", "-A VPN_FORWARD -i ppp+ -d %s -j RETURN" % localcidr])
            self.fw.append(["", "", "-A VPN_FORWARD -i ppp+  -o ppp+ -j RETURN"])
        else:
            self.fw.append(["", "", "-A FORWARD -i ppp+ -o  ppp+ -j ACCEPT"])
            self.fw.append(["", "", "-A FORWARD -s %s -o  ppp+ -j ACCEPT" % localcidr])
            self.fw.append(["", "", "-A FORWARD -i ppp+ -d %s  -j ACCEPT" % localcidr])

        self.fw.append(["", "", "-A INPUT -i ppp+ -m udp -p udp --dport 53 -j ACCEPT"])
        self.fw.append(["", "", "-A INPUT -i ppp+ -m tcp -p tcp --dport 53 -j ACCEPT"])
        self.fw.append(["nat", "", "-I PREROUTING -i ppp+ -p tcp -m tcp --dport 53 -j DNAT --to-destination %s" % local_ip])

        if self.config.is_vpc():
            return

        self.fw.append(["mangle", "", "-N  VPN_%s " % publicip])
        self.fw.append(["mangle", "", "-A VPN_%s -j RETURN " % publicip])
        self.fw.append(["mangle", "", "-I VPN_%s -p ah  -j ACCEPT " % publicip])
        self.fw.append(["mangle", "", "-I VPN_%s -p esp  -j ACCEPT " % publicip])
        self.fw.append(["mangle", "", "-I PREROUTING  -d %s -j VPN_%s " % (publicip, publicip)])


class CsForwardingRules(CsDataBag):

    def process(self):
        for public_ip in self.dbag:
            if public_ip == "id":
                continue
            for rule in self.dbag[public_ip]:
                if rule["type"] == "forward":
                    self.processForwardRule(rule)
                elif rule["type"] == "staticnat":
                    self.processStaticNatRule(rule)

    # Return the VR guest interface ip
    def getGuestIp(self):
        interfaces = []
        ipAddr = None
        for interface in self.config.address().get_interfaces():
            if interface.is_guest():
                interfaces.append(interface)
            if len(interfaces) > 0:
                ipAddr = sorted(interfaces)[-1]
            if ipAddr:
                return ipAddr.get_ip()

        return None

    def getGuestIpByIp(self, ipa):
        for interface in self.config.address().get_interfaces():
            if interface.ip_in_subnet(ipa):
                return interface.get_ip()
        return None

    def getDeviceByIp(self, ipa):
        for interface in self.config.address().get_interfaces():
            if interface.ip_in_subnet(ipa):
                return interface.get_device()
        return None

    def getNetworkByIp(self, ipa):
        for interface in self.config.address().get_interfaces():
            if interface.ip_in_subnet(ipa):
                return interface.get_network()
        return None

    def getGatewayByIp(self, ipa):
        for interface in self.config.address().get_interfaces():
            if interface.ip_in_subnet(ipa):
                return interface.get_gateway()
        return None

    def getPrivateGatewayNetworks(self):
        interfaces = []
        for interface in self.config.address().get_interfaces():
            if interface.is_private_gateway():
                interfaces.append(interface)
        return interfaces

    def getStaticRoutes(self):
        static_routes = CsStaticRoutes("staticroutes", self.config)
        routes = []
        if not static_routes:
            return routes
        for item in static_routes.get_bag():
            if item == "id":
                continue
            static_route = static_routes.get_bag()[item]
            if static_route['revoke']:
                continue
            routes.append(static_route)
        return routes

    def portsToString(self, ports, delimiter):
        ports_parts = ports.split(":", 2)
        if ports_parts[0] == ports_parts[1]:
            return str(ports_parts[0])
        else:
            return "%s%s%s" % (ports_parts[0], delimiter, ports_parts[1])

    def processForwardRule(self, rule):
        if self.config.is_vpc():
            self.forward_vpc(rule)
        else:
            self.forward_vr(rule)

    def forward_vr(self, rule):
        # Prefetch iptables variables
        public_fwinterface = self.getDeviceByIp(rule['public_ip'])
        internal_fwinterface = self.getDeviceByIp(rule['internal_ip'])
        public_fwports = self.portsToString(rule['public_ports'], ':')
        internal_fwports = self.portsToString(rule['internal_ports'], '-')
        fw1 = "-A PREROUTING -d %s/32 -i %s -p %s -m %s --dport %s -j DNAT --to-destination %s:%s" % \
              (
                rule['public_ip'],
                public_fwinterface,
                rule['protocol'],
                rule['protocol'],
                public_fwports,
                rule['internal_ip'],
                internal_fwports
              )
        fw2 = "-A PREROUTING -d %s/32 -i %s -p %s -m %s --dport %s -j DNAT --to-destination %s:%s" % \
              (
                rule['public_ip'],
                internal_fwinterface,
                rule['protocol'],
                rule['protocol'],
                public_fwports,
                rule['internal_ip'],
                internal_fwports
              )
        fw3 = "-A OUTPUT -d %s/32 -p %s -m %s --dport %s -j DNAT --to-destination %s:%s" % \
              (
                rule['public_ip'],
                rule['protocol'],
                rule['protocol'],
                public_fwports,
                rule['internal_ip'],
                internal_fwports
              )
        fw4 = "-j SNAT --to-source %s -A POSTROUTING -s %s -d %s/32 -o %s -p %s -m %s --dport %s" % \
              (
                self.getGuestIp(),
                self.getNetworkByIp(rule['internal_ip']),
                rule['internal_ip'],
                internal_fwinterface,
                rule['protocol'],
                rule['protocol'],
                self.portsToString(rule['internal_ports'], ':')
              )
        fw5 = "-A PREROUTING -d %s/32 -i %s -p %s -m %s --dport %s -j MARK --set-xmark %s/0xffffffff" % \
              (
                rule['public_ip'],
                public_fwinterface,
                rule['protocol'],
                rule['protocol'],
                public_fwports,
                hex(100 + int(public_fwinterface[3:]))
              )
        fw6 = "-A PREROUTING -d %s/32 -i %s -p %s -m %s --dport %s -m state --state NEW -j CONNMARK --save-mark --nfmask 0xffffffff --ctmask 0xffffffff" % \
              (
                rule['public_ip'],
                public_fwinterface,
                rule['protocol'],
                rule['protocol'],
                public_fwports,
              )
        fw7 = "-A FORWARD -i %s -o %s -p %s -m %s --dport %s -m state --state NEW,ESTABLISHED -j ACCEPT" % \
              (
                public_fwinterface,
                internal_fwinterface,
                rule['protocol'],
                rule['protocol'],
                self.portsToString(rule['internal_ports'], ':')
              )
        self.fw.append(["nat", "", fw1])
        self.fw.append(["nat", "", fw2])
        self.fw.append(["nat", "", fw3])
        self.fw.append(["nat", "", fw4])
        self.fw.append(["nat", "", fw5])
        self.fw.append(["nat", "", fw6])
        self.fw.append(["filter", "", fw7])

    def forward_vpc(self, rule):
        fw_prerout_rule = "-A PREROUTING -d %s/32 " % (rule["public_ip"])
        if not rule["protocol"] == "any":
            fw_prerout_rule += " -m %s -p %s" % (rule["protocol"], rule["protocol"])
        if not rule["public_ports"] == "any":
            fw_prerout_rule += " --dport %s" % self.portsToString(rule["public_ports"], ":")
        fw_prerout_rule += " -j DNAT --to-destination %s" % rule["internal_ip"]
        if not rule["internal_ports"] == "any":
            fw_prerout_rule += ":" + self.portsToString(rule["internal_ports"], "-")

        fw_output_rule = "-A OUTPUT -d %s/32" % rule["public_ip"]
        if not rule["protocol"] == "any":
            fw_output_rule += " -m %s -p %s" % (rule["protocol"], rule["protocol"])
        if not rule["public_ports"] == "any":
            fw_output_rule += " --dport %s" % self.portsToString(rule["public_ports"], ":")
        fw_output_rule += " -j DNAT --to-destination %s" % rule["internal_ip"]
        if not rule["internal_ports"] == "any":
            fw_output_rule += ":" + self.portsToString(rule["internal_ports"], "-")

        fw_postrout_rule2 = "-j SNAT --to-source %s -A POSTROUTING -s %s -d %s/32 -o %s -p %s -m %s --dport %s" % \
            (
                self.getGuestIpByIp(rule['internal_ip']),
                self.getNetworkByIp(rule['internal_ip']),
                rule['internal_ip'],
                self.getDeviceByIp(rule['internal_ip']),
                rule['protocol'],
                rule['protocol'],
                self.portsToString(rule['internal_ports'], ':')
            )

        self.fw.append(["nat", "", fw_prerout_rule])
        self.fw.append(["nat", "", fw_postrout_rule2])
        self.fw.append(["nat", "", fw_output_rule])

    def processStaticNatRule(self, rule):
        # FIXME this needs ordering with the VPN no nat rule
        device = self.getDeviceByIp(rule["public_ip"])
        if device is None:
            raise Exception("Ip address %s has no device in the ips databag" % rule["public_ip"])

        chain_name = "PREROUTING-%s-def" % device
        self.fw.append(["mangle", "front",
                        "-A PREROUTING -s %s/32 -m state --state NEW -j %s" %
                        (rule["internal_ip"], chain_name)])
        self.fw.append(["mangle", "",
                        "-A %s -j MARK --set-xmark %s/0xffffffff" %
                        (chain_name, hex(100 + int(device[len("eth"):])))])
        self.fw.append(["mangle", "",
                        "-A %s -j CONNMARK --save-mark --nfmask 0xffffffff --ctmask 0xffffffff" %
                        chain_name])
        private_gateways = self.getPrivateGatewayNetworks()
        for private_gw in private_gateways:
            self.fw.append(["mangle", "front", "-A %s -d %s -j RETURN" %
                            (chain_name, private_gw.get_network())])
        static_routes = self.getStaticRoutes()
        for static_route in static_routes:
            self.fw.append(["mangle", "front", "-A %s -d %s -j RETURN" %
                            (chain_name, static_route['network'])])

        self.fw.append(["nat", "front",
                        "-A PREROUTING -d %s/32 -j DNAT --to-destination %s" % (rule["public_ip"], rule["internal_ip"])])
        self.fw.append(["nat", "front",
                        "-A POSTROUTING -o %s -s %s/32 -j SNAT --to-source %s" % (device, rule["internal_ip"], rule["public_ip"])])
        self.fw.append(["nat", "front",
                        "-A OUTPUT -d %s/32 -j DNAT --to-destination %s" % (rule["public_ip"], rule["internal_ip"])])
        self.fw.append(["filter", "",
                        "-A FORWARD -i %s -o eth0  -d %s  -m state  --state NEW -j ACCEPT " % (device, rule["internal_ip"])])

        # Configure the hairpin snat
        self.fw.append(["nat", "front", "-A POSTROUTING -s %s -d %s -j SNAT -o %s --to-source %s" %
                        (self.getNetworkByIp(rule['internal_ip']), rule["internal_ip"], self.getDeviceByIp(rule["internal_ip"]), self.getGuestIpByIp(rule["internal_ip"]))])


class IpTablesExecutor:

    config = None

    def __init__(self, config):
        self.config = config

    def process(self):
        acls = CsAcl('networkacl', self.config)
        acls.flushAllIpv6Rules()
        acls.process()

        acls = CsAcl('firewallrules', self.config)
        acls.flushAllowAllEgressRules()
        acls.process()

        ip6_fw = CsIpv6Firewall('ipv6firewallrules', self.config)
        ip6_fw.flushAllRules()
        ip6_fw.process()

        fwd = CsForwardingRules("forwardingrules", self.config)
        fwd.process()

        vpns = CsSite2SiteVpn("site2sitevpn", self.config)
        vpns.process()

        rvpn = CsRemoteAccessVpn("remoteaccessvpn", self.config)
        rvpn.process()

        lb = CsLoadBalancer("loadbalancer", self.config)
        lb.process()

        logging.debug("Configuring iptables rules")
        nf = CsNetfilters()
        nf.compare(self.config.get_fw())

        logging.info("Configuring nftables ACL rules %s" % self.config.get_ipv6_acl())
        nf = CsNetfilters()
        nf.apply_ip6_rules(self.config.get_ipv6_acl(), "acl")

        logging.info("Configuring nftables IPv6 rules %s" % self.config.get_ipv6_fw())
        nf = CsNetfilters()
        nf.apply_ip6_rules(self.config.get_ipv6_fw(), "firewall")

        logging.debug("Configuring iptables rules done ...saving rules")

        # Save iptables configuration - will be loaded on reboot by the iptables-restore that is configured on /etc/rc.local
        CsHelper.save_iptables("iptables-save", "/etc/iptables/rules.v4")
        CsHelper.save_iptables("ip6tables-save", "/etc/iptables/rules.v6")


def main(argv):
    # The file we are currently processing, if it is "cmd_line.json" everything will be processed.
    process_file = argv[1]

    if process_file is None:
        logging.debug("No file was received, do not go on processing the other actions. Just leave for now.")
        return

    json_type = os.path.basename(process_file).split('.json')[0]

    # The "GLOBAL" Configuration object
    config = CsConfig()

    # Load stored ip addresses from disk to CsConfig()
    config.set_address()

    logging.debug("Configuring ip addresses")
    config.address().compare()
    config.address().process()

    databag_map = OrderedDict([("guest_network",       {"process_iptables": True,  "executor": [CsVpcGuestNetwork("guestnetwork", config)]}),
                               ("ip_aliases",          {"process_iptables": True,  "executor": []}),
                               ("vm_password",         {"process_iptables": False, "executor": [CsPassword("vmpassword", config)]}),
                               ("vm_metadata",         {"process_iptables": False, "executor": [CsVmMetadata('vmdata', config)]}),
                               ("network_acl",         {"process_iptables": True,  "executor": []}),
                               ("firewall_rules",      {"process_iptables": True,  "executor": []}),
                               ("ipv6_firewall_rules", {"process_iptables": True,  "executor": []}),
                               ("forwarding_rules",    {"process_iptables": True,  "executor": []}),
                               ("staticnat_rules",     {"process_iptables": True,  "executor": []}),
                               ("site_2_site_vpn",     {"process_iptables": True,  "executor": []}),
                               ("remote_access_vpn",   {"process_iptables": True,  "executor": []}),
                               ("vpn_user_list",       {"process_iptables": False, "executor": [CsVpnUser("vpnuserlist", config)]}),
                               ("vm_dhcp_entry",       {"process_iptables": False, "executor": [CsDhcp("dhcpentry", config)]}),
                               ("dhcp",                {"process_iptables": False, "executor": [CsDhcp("dhcpentry", config)]}),
                               ("load_balancer",       {"process_iptables": True,  "executor": []}),
                               ("monitor_service",     {"process_iptables": False, "executor": [CsMonitor("monitorservice", config)]}),
                               ("static_routes",       {"process_iptables": False, "executor": [CsStaticRoutes("staticroutes", config)]})
                               ])

    if not config.is_vpc():
        databag_map.pop("guest_network")

    def execDatabag(key, db):
        if key not in list(db.keys()) or 'executor' not in db[key]:
            logging.warn("Unable to find config or executor(s) for the databag type %s" % key)
            return
        for executor in db[key]['executor']:
            logging.debug("Processing for databag type: %s" % key)
            executor.process()

    def execIptables(config):
        logging.debug("Processing iptables rules")
        iptables_executor = IpTablesExecutor(config)
        iptables_executor.process()

    if json_type == "cmd_line":
        logging.debug("cmd_line.json changed. All other files will be processed as well.")
        for key in list(databag_map.keys()):
            execDatabag(key, databag_map)
        execIptables(config)
    elif json_type in list(databag_map.keys()):
        execDatabag(json_type, databag_map)
        if databag_map[json_type]['process_iptables']:
            execIptables(config)
    else:
        logging.warn("Unable to find and process databag for file: %s, for json type=%s" % (process_file, json_type))

    red = CsRedundant(config)
    red.set()
    return 0


if __name__ == "__main__":
    main(sys.argv)