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cloudstack/systemvm/debian/opt/cloud/bin/configure.py
Daan Hoogland b7f0aac519 Merge branch '4.19' into 4.20
2024-12-20 14:34:39 +01:00

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#!/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
import ipaddress
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
from cs.CsBgpPeers import CsBgpPeers
ICMP_TYPE_ANY = "{ echo-reply, destination-unreachable, source-quench, redirect, echo-request, time-exceeded, \
parameter-problem, timestamp-request, timestamp-reply, info-request, info-reply, address-mask-request, \
address-mask-reply, router-advertisement, router-solicitation }"
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'])
def add_routing_rules(self):
fw = self.config.get_nft_ipv4_fw()
logging.info("Processing routing 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]
network = ipaddress.ip_network(self.config.cmdline().get_eth0_ip() + "/" + self.config.cmdline().get_cidr_size(), False)
guest_cidr = network.with_prefixlen
if chains_added is False:
parent_chain = "FORWARD"
chain = "fw_chain_egress"
parent_chain_rule = "ip 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 = "ip 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 = "ip 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 = "ip daddr " + dest_cidrs
proto = ""
protocol = rule['protocol']
if protocol != "all":
icmp_type = ""
proto = protocol
if proto == "icmp":
proto = proto_str = "icmp"
icmp_type = ICMP_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 routing 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 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()
self.nft_ipv4_acl = config.get_nft_ipv4_acl()
def create(self):
self.process("ingress", self.ingress, self.FIXED_RULES_INGRESS, self.config.is_routed())
self.process("egress", self.egress, self.FIXED_RULES_EGRESS, self.config.is_routed())
def __process_routing_ip4(self, direction, rule_list):
if not self.cidr:
return
tier_cidr = self.cidr
chain = "%s_%s_policy" % (self.device, direction)
parent_chain = "FORWARD"
cidr_key = "saddr"
if direction == "ingress":
cidr_key = "daddr"
parent_chain_rule = "ip %s %s jump %s" % (cidr_key, tier_cidr, chain)
self.nft_ipv4_acl.append({'type': "", 'chain': parent_chain, 'rule': parent_chain_rule})
self.nft_ipv4_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, 6)
if cidr is None or cidr == "":
continue
addr = ""
if cidr:
addr = "ip daddr " + cidr
if direction == "ingress":
addr = "ip saddr " + cidr
proto = ""
protocol = rule['type']
if protocol != "all":
icmp_type = ""
if protocol == "protocol":
protocol = "ip nexthdr %d" % rule['protocol']
proto = protocol
if proto == "icmp":
proto = proto_str = "icmp"
icmp_type = ICMP_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 routing ACL rule %s" % rstr)
if type == "chain":
self.nft_ipv4_acl.insert(0, {'type': type, 'chain': chain, 'rule': rstr})
else:
self.nft_ipv4_acl.append({'type': type, 'chain': chain, 'rule': rstr})
rstr = "counter packets 0 bytes 0 drop"
self.nft_ipv4_acl.append({'type': "", 'chain': chain, 'rule': rstr})
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, is_routed):
if is_routed:
self.__process_routing_ip4(direction, rule_list)
self.__process_ip6(direction, rule_list)
return
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() and not config.is_routed():
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 flushAllIptablesRules(self):
if not self.config.is_routed():
return
# Flush all iptables rules for routing networks, which are replaced by nftables rules
logging.info("Flush all iptables rules")
CsHelper.execute("iptables -F filter")
CsHelper.execute("iptables -F nat")
CsHelper.execute("iptables -F mangle")
CsHelper.execute("nft delete table ip filter")
CsHelper.execute("nft delete table ip nat")
CsHelper.execute("nft delete table ip mangle")
def flushAllowAllEgressRules(self):
if self.config.is_routed():
return
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 flushAllIpv4RoutingRules(self):
if not self.config.is_routed():
return
logging.info("Flush all Routing firewall rules")
address_family = 'ip'
table = 'ip4_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 flushAllIpv4RoutingACLRules(self):
if not self.config.is_routed():
return
logging.info("Flush all ACL rules for routing network")
address_family = 'ip'
table = 'ip4_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 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):
if self.config.is_routed() and not self.config.is_vpc():
self.add_routing_rules()
return
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 __writefile(self, dest, data, mode):
fh = open(dest, mode)
self.__exflock(fh)
fh.write(data)
self.__unflock(fh)
fh.close()
os.chmod(dest, 0o644)
def __createfile(self, ip, folder, file, data):
dest = "/var/www/html/" + folder + "/" + ip + "/" + file
metamanifestdir = "/var/www/html/" + folder + "/" + ip
metamanifest = metamanifestdir + "/meta-data"
if data is not None:
# base64 decode userdata
if folder == "userdata" or folder == "user-data":
# 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)
if isinstance(data, str):
self.__writefile(dest, data, "w")
elif isinstance(data, bytes):
self.__writefile(dest, data, "wb")
else:
self.__writefile(dest, "", "w")
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"
if "source_cidr_list" in rule and rule["source_cidr_list"]:
fw_prerout_rule += " -s %s" % rule["source_cidr_list"]
fw_prerout_rule += " -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"
if "source_cidr_list" in rule and rule["source_cidr_list"]:
fw_output_rule += " -s %s" % rule["source_cidr_list"]
fw_output_rule += " -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 IPv4 firewall rules %s" % self.config.get_nft_ipv4_fw())
acls.flushAllIpv4RoutingRules()
nf = CsNetfilters()
nf.apply_nft_ipv4_rules(self.config.get_nft_ipv4_fw(), "firewall")
acls.flushAllIptablesRules()
logging.info("Configuring nftables IPv4 ACL rules %s" % self.config.get_nft_ipv4_acl())
acls.flushAllIpv4RoutingACLRules()
nf = CsNetfilters()
nf.apply_nft_ipv4_rules(self.config.get_nft_ipv4_acl(), "acl")
logging.info("Configuring nftables IPv6 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 firewall 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")
# Save nftables configuration
CsHelper.save_iptables("nft list ruleset", "/etc/iptables/rules.nftables")
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)]}),
("bgp_peers", {"process_iptables": False, "executor": [CsBgpPeers("bgppeers", 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": True, "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)
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