632 lines
23 KiB
Python
632 lines
23 KiB
Python
#!/usr/bin/env python3
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# network.py - PVC client function library, Network fuctions
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# Part of the Parallel Virtual Cluster (PVC) system
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#
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# Copyright (C) 2018-2021 Joshua M. Boniface <joshua@boniface.me>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, version 3.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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###############################################################################
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import re
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#
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# Cluster search functions
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#
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def getClusterNetworkList(zkhandler):
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# Get a list of VNIs by listing the children of /networks
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vni_list = zkhandler.children('base.network')
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description_list = []
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# For each VNI, get the corresponding description from the data
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for vni in vni_list:
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description_list.append(zkhandler.read(('network', vni)))
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return vni_list, description_list
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def searchClusterByVNI(zkhandler, vni):
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try:
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# Get the lists
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vni_list, description_list = getClusterNetworkList(zkhandler)
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# We're looking for UUID, so find that element ID
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index = vni_list.index(vni)
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# Get the name_list element at that index
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description = description_list[index]
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except ValueError:
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# We didn't find anything
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return None
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return description
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def searchClusterByDescription(zkhandler, description):
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try:
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# Get the lists
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vni_list, description_list = getClusterNetworkList(zkhandler)
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# We're looking for name, so find that element ID
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index = description_list.index(description)
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# Get the uuid_list element at that index
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vni = vni_list[index]
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except ValueError:
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# We didn't find anything
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return None
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return vni
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def getNetworkVNI(zkhandler, network):
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# Validate and obtain alternate passed value
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if network.isdigit():
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net_description = searchClusterByVNI(zkhandler, network)
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net_vni = searchClusterByDescription(zkhandler, net_description)
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else:
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net_vni = searchClusterByDescription(zkhandler, network)
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net_description = searchClusterByVNI(zkhandler, net_vni)
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return net_vni
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def getNetworkDescription(zkhandler, network):
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# Validate and obtain alternate passed value
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if network.isdigit():
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net_description = searchClusterByVNI(zkhandler, network)
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net_vni = searchClusterByDescription(zkhandler, net_description)
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else:
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net_vni = searchClusterByDescription(zkhandler, network)
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net_description = searchClusterByVNI(zkhandler, net_vni)
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return net_description
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def getNetworkDHCPLeases(zkhandler, vni):
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# Get a list of DHCP leases by listing the children of /networks/<vni>/dhcp4_leases
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leases = zkhandler.children(('network.lease', vni))
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return sorted(leases)
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def getNetworkDHCPReservations(zkhandler, vni):
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# Get a list of DHCP reservations by listing the children of /networks/<vni>/dhcp4_reservations
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reservations = zkhandler.children(('network.reservation', vni))
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return sorted(reservations)
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def getNetworkACLs(zkhandler, vni, _direction):
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# Get the (sorted) list of active ACLs
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if _direction == 'both':
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directions = ['in', 'out']
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else:
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directions = [_direction]
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full_acl_list = []
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for direction in directions:
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unordered_acl_list = zkhandler.children((f'network.rule.{direction}', vni))
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if len(unordered_acl_list) < 1:
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continue
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ordered_acls = dict()
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for acl in unordered_acl_list:
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order = zkhandler.read((f'network.rule.{direction}', vni, 'rule.order', acl))
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if order is None:
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continue
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ordered_acls[order] = acl
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for order in sorted(ordered_acls.keys()):
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rule = zkhandler.read((f'network.rule.{direction}', vni, 'rule.rule', acl))
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if rule is None:
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continue
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full_acl_list.append({'direction': direction, 'order': int(order), 'description': ordered_acls[order], 'rule': rule})
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return full_acl_list
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def getNetworkInformation(zkhandler, vni):
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description = zkhandler.read(('network', vni))
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nettype = zkhandler.read(('network.type', vni))
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domain = zkhandler.read(('network.domain', vni))
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name_servers = zkhandler.read(('network.nameservers', vni))
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ip6_network = zkhandler.read(('network.ip6.network', vni))
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ip6_gateway = zkhandler.read(('network.ip6.gateway', vni))
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dhcp6_flag = zkhandler.read(('network.ip6.dhcp', vni))
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ip4_network = zkhandler.read(('network.ip4.network', vni))
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ip4_gateway = zkhandler.read(('network.ip4.gateway', vni))
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dhcp4_flag = zkhandler.read(('network.ip4.dhcp', vni))
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dhcp4_start = zkhandler.read(('network.ip4.dhcp_start', vni))
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dhcp4_end = zkhandler.read(('network.ip4.dhcp_end', vni))
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# Construct a data structure to represent the data
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network_information = {
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'vni': int(vni),
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'description': description,
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'type': nettype,
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'domain': domain,
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'name_servers': name_servers.split(','),
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'ip6': {
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'network': ip6_network,
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'gateway': ip6_gateway,
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'dhcp_flag': dhcp6_flag,
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},
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'ip4': {
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'network': ip4_network,
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'gateway': ip4_gateway,
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'dhcp_flag': dhcp4_flag,
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'dhcp_start': dhcp4_start,
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'dhcp_end': dhcp4_end
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}
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}
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return network_information
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def getDHCPLeaseInformation(zkhandler, vni, mac_address):
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# Check whether this is a dynamic or static lease
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if zkhandler.exists(('network.lease', vni, 'lease', mac_address)):
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type_key = 'lease'
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elif zkhandler.exists(('network.reservation', vni, 'reservation', mac_address)):
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type_key = 'reservation'
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else:
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return None
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hostname = zkhandler.read((f'network.{type_key}', vni, f'{type_key}.hostname', mac_address))
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ip4_address = zkhandler.read((f'network.{type_key}', vni, f'{type_key}.ip', mac_address))
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if type_key == 'lease':
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timestamp = zkhandler.read((f'network.{type_key}', vni, f'{type_key}.expiry', mac_address))
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else:
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timestamp = 'static'
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# Construct a data structure to represent the data
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lease_information = {
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'hostname': hostname,
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'ip4_address': ip4_address,
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'mac_address': mac_address,
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'timestamp': timestamp
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}
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return lease_information
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def getACLInformation(zkhandler, vni, direction, acl):
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order = zkhandler.read((f'network.rule.{direction}', vni, 'rule.order', acl))
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rule = zkhandler.read((f'network.rule.{direction}', vni, 'rule.rule', acl))
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# Construct a data structure to represent the data
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acl_information = {
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'order': order,
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'description': acl,
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'rule': rule,
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'direction': direction
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}
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return acl_information
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def isValidMAC(macaddr):
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allowed = re.compile(r'(^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$)', re.VERBOSE | re.IGNORECASE)
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if allowed.match(macaddr):
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return True
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else:
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return False
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def isValidIP(ipaddr):
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ip4_blocks = str(ipaddr).split(".")
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if len(ip4_blocks) == 4:
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for block in ip4_blocks:
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# Check if number is digit, if not checked before calling this function
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if not block.isdigit():
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return False
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tmp = int(block)
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if 0 > tmp > 255:
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return False
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return True
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return False
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#
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# Direct functions
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#
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def add_network(zkhandler, vni, description, nettype,
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domain, name_servers, ip4_network, ip4_gateway, ip6_network, ip6_gateway,
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dhcp4_flag, dhcp4_start, dhcp4_end):
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# Ensure start and end DHCP ranges are set if the flag is set
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if dhcp4_flag and (not dhcp4_start or not dhcp4_end):
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return False, 'ERROR: DHCPv4 start and end addresses are required for a DHCPv4-enabled network.'
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# Check if a network with this VNI or description already exists
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if zkhandler.exists(('network', vni)):
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return False, 'ERROR: A network with VNI "{}" already exists!'.format(vni)
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for network in zkhandler.children('base.network'):
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network_description = zkhandler.read(('network', network))
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if network_description == description:
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return False, 'ERROR: A network with description "{}" already exists!'.format(description)
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# We're generating the default gateway to be ip6_network::1/YY
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if ip6_network:
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dhcp6_flag = 'True'
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if not ip6_gateway:
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ip6_netpart, ip6_maskpart = ip6_network.split('/')
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ip6_gateway = '{}1'.format(ip6_netpart)
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else:
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dhcp6_flag = 'False'
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if nettype in ['managed'] and not domain:
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domain = '{}.local'.format(description)
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# Add the new network to Zookeeper
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result = zkhandler.write([
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(('network', vni), description),
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(('network.type', vni), nettype),
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(('network.domain', vni), domain),
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(('network.nameservers', vni), name_servers),
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(('network.ip6.network', vni), ip6_network),
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(('network.ip6.gateway', vni), ip6_gateway),
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(('network.ip6.dhcp', vni), dhcp6_flag),
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(('network.ip4.network', vni), ip4_network),
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(('network.ip4.gateway', vni), ip4_gateway),
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(('network.ip4.dhcp', vni), dhcp4_flag),
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(('network.ip4.dhcp_start', vni), dhcp4_start),
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(('network.ip4.dhcp_end', vni), dhcp4_end),
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(('network.lease', vni), ''),
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(('network.reservation', vni), ''),
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(('network.rule', vni), ''),
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(('network.rule.in', vni), ''),
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(('network.rule.out', vni), '')
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])
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if result:
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return True, 'Network "{}" added successfully!'.format(description)
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else:
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return False, 'ERROR: Failed to add network.'
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def modify_network(zkhandler, vni, description=None, domain=None, name_servers=None,
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ip4_network=None, ip4_gateway=None, ip6_network=None, ip6_gateway=None,
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dhcp4_flag=None, dhcp4_start=None, dhcp4_end=None):
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# Add the modified parameters to Zookeeper
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update_data = list()
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if description is not None:
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update_data.append((('network', vni), description))
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if domain is not None:
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update_data.append((('network.domain', vni), domain))
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if name_servers is not None:
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update_data.append((('network.nameservers', vni), name_servers))
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if ip4_network is not None:
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update_data.append((('network.ip4.network', vni), ip4_network))
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if ip4_gateway is not None:
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update_data.append((('network.ip4.gateway', vni), ip4_gateway))
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if ip6_network is not None:
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update_data.append((('network.ip6.network', vni), ip6_network))
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if ip6_network:
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update_data.append((('network.ip6.dhcp', vni), 'True'))
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else:
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update_data.append((('network.ip6.dhcp', vni), 'False'))
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if ip6_gateway is not None:
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update_data.append((('network.ip6.gateway', vni), ip6_gateway))
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else:
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# If we're changing the network, but don't also specify the gateway,
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# generate a new one automatically
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if ip6_network:
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ip6_netpart, ip6_maskpart = ip6_network.split('/')
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ip6_gateway = '{}1'.format(ip6_netpart)
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update_data.append((('network.ip6.gateway', vni), ip6_gateway))
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if dhcp4_flag is not None:
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update_data.append((('network.ip4.dhcp', vni), dhcp4_flag))
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if dhcp4_start is not None:
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update_data.append((('network.ip4.dhcp_start', vni), dhcp4_start))
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if dhcp4_end is not None:
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update_data.append((('network.ip4.dhcp_end', vni), dhcp4_end))
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zkhandler.write(update_data)
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return True, 'Network "{}" modified successfully!'.format(vni)
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def remove_network(zkhandler, network):
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# Validate and obtain alternate passed value
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vni = getNetworkVNI(zkhandler, network)
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description = getNetworkDescription(zkhandler, network)
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if not vni:
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return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
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# Delete the configuration
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zkhandler.delete([
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('network', vni)
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])
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return True, 'Network "{}" removed successfully!'.format(description)
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def add_dhcp_reservation(zkhandler, network, ipaddress, macaddress, hostname):
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# Validate and obtain standard passed value
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net_vni = getNetworkVNI(zkhandler, network)
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if not net_vni:
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return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
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# Use lowercase MAC format exclusively
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macaddress = macaddress.lower()
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if not isValidMAC(macaddress):
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return False, 'ERROR: MAC address "{}" is not valid! Always use ":" as a separator.'.format(macaddress)
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if not isValidIP(ipaddress):
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return False, 'ERROR: IP address "{}" is not valid!'.format(macaddress)
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if zkhandler.exists(('network.reservation', net_vni, 'reservation', macaddress)):
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return False, 'ERROR: A reservation with MAC "{}" already exists!'.format(macaddress)
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# Add the new static lease to ZK
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zkhandler.write([
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(('network.reservation', net_vni, 'reservation', macaddress), 'static'),
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(('network.reservation', net_vni, 'reservation.hostname', macaddress), hostname),
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(('network.reservation', net_vni, 'reservation.ip', macaddress), ipaddress),
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])
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return True, 'DHCP reservation "{}" added successfully!'.format(macaddress)
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def remove_dhcp_reservation(zkhandler, network, reservation):
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# Validate and obtain standard passed value
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net_vni = getNetworkVNI(zkhandler, network)
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if not net_vni:
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return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
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match_description = ''
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# Check if the reservation matches a static reservation description, a mac, or an IP address currently in the database
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dhcp4_reservations_list = getNetworkDHCPReservations(zkhandler, net_vni)
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for macaddr in dhcp4_reservations_list:
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hostname = zkhandler.read(('network.reservation', net_vni, 'reservation.hostname', macaddr))
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ipaddress = zkhandler.read(('network.reservation', net_vni, 'reservation.ip', macaddr))
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if reservation == macaddr or reservation == hostname or reservation == ipaddress:
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match_description = macaddr
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lease_type_zk = 'reservation'
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lease_type_human = 'static reservation'
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# Check if the reservation matches a dynamic reservation description, a mac, or an IP address currently in the database
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dhcp4_leases_list = getNetworkDHCPLeases(zkhandler, net_vni)
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for macaddr in dhcp4_leases_list:
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hostname = zkhandler.read(('network.lease', net_vni, 'lease.hostname', macaddr))
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ipaddress = zkhandler.read(('network.lease', net_vni, 'lease.ip', macaddr))
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if reservation == macaddr or reservation == hostname or reservation == ipaddress:
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match_description = macaddr
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lease_type_zk = 'lease'
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lease_type_human = 'dynamic lease'
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if not match_description:
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return False, 'ERROR: No DHCP reservation or lease exists matching "{}"!'.format(reservation)
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# Remove the entry from zookeeper
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zkhandler.delete([
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(f'network.{lease_type_zk}', net_vni, f'{lease_type_zk}', match_description),
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])
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return True, 'DHCP {} "{}" removed successfully!'.format(lease_type_human, match_description)
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def add_acl(zkhandler, network, direction, description, rule, order):
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# Validate and obtain standard passed value
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net_vni = getNetworkVNI(zkhandler, network)
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if not net_vni:
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return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
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# Check if the ACL matches a description currently in the database
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match_description = ''
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full_acl_list = getNetworkACLs(zkhandler, net_vni, 'both')
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for acl in full_acl_list:
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if acl['description'] == description:
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match_description = acl['description']
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if match_description:
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return False, 'ERROR: A rule with description "{}" already exists!'.format(description)
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# Change direction to something more usable
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if direction:
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direction = "in"
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else:
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direction = "out"
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# Handle reordering
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full_acl_list = getNetworkACLs(zkhandler, net_vni, direction)
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acl_list_length = len(full_acl_list)
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# Set order to len
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if not order or int(order) > acl_list_length:
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order = acl_list_length
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# Convert passed-in order to an integer
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else:
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order = int(order)
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# Insert into the array at order-1
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full_acl_list.insert(order, {'direction': direction, 'description': description, 'rule': rule})
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# Update the existing ordering
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for idx, acl in enumerate(full_acl_list):
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if acl['description'] == description:
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continue
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if idx == acl['order']:
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continue
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else:
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zkhandler.write([
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((f'network.rule.{direction}', net_vni, 'rule.order', acl['description']), idx)
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])
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# Add the new rule
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zkhandler.write([
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((f'network.rule.{direction}', net_vni, 'rule', description), ''),
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((f'network.rule.{direction}', net_vni, 'rule.order', description), order),
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((f'network.rule.{direction}', net_vni, 'rule.rule', description), rule),
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])
|
|
|
|
return True, 'Firewall rule "{}" added successfully!'.format(description)
|
|
|
|
|
|
def remove_acl(zkhandler, network, description):
|
|
# Validate and obtain standard passed value
|
|
net_vni = getNetworkVNI(zkhandler, network)
|
|
if not net_vni:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
match_description = ''
|
|
|
|
# Check if the ACL matches a description currently in the database
|
|
acl_list = getNetworkACLs(zkhandler, net_vni, 'both')
|
|
for acl in acl_list:
|
|
if acl['description'] == description:
|
|
match_description = acl['description']
|
|
match_direction = acl['direction']
|
|
|
|
if not match_description:
|
|
return False, 'ERROR: No firewall rule exists matching description "{}"!'.format(description)
|
|
|
|
# Remove the entry from zookeeper
|
|
zkhandler.delete([
|
|
(f'network.rule.{match_direction}', net_vni, 'rule', match_description)
|
|
])
|
|
|
|
# Update the existing ordering
|
|
updated_acl_list = getNetworkACLs(zkhandler, net_vni, match_direction)
|
|
for idx, acl in enumerate(updated_acl_list):
|
|
if acl['description'] == description:
|
|
continue
|
|
|
|
if idx == acl['order']:
|
|
continue
|
|
else:
|
|
zkhandler.write([
|
|
((f'network.rule.{match_direction}', net_vni, 'rule.order', acl['description']), idx),
|
|
])
|
|
|
|
return True, 'Firewall rule "{}" removed successfully!'.format(match_description)
|
|
|
|
|
|
def get_info(zkhandler, network):
|
|
# Validate and obtain alternate passed value
|
|
net_vni = getNetworkVNI(zkhandler, network)
|
|
if not net_vni:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
network_information = getNetworkInformation(zkhandler, network)
|
|
if not network_information:
|
|
return False, 'ERROR: Could not get information about network "{}"'.format(network)
|
|
|
|
return True, network_information
|
|
|
|
|
|
def get_list(zkhandler, limit, is_fuzzy=True):
|
|
net_list = []
|
|
full_net_list = zkhandler.children('base.network')
|
|
|
|
for net in full_net_list:
|
|
description = zkhandler.read(('network', net))
|
|
if limit:
|
|
try:
|
|
if not is_fuzzy:
|
|
limit = '^' + limit + '$'
|
|
|
|
if re.match(limit, net):
|
|
net_list.append(getNetworkInformation(zkhandler, net))
|
|
if re.match(limit, description):
|
|
net_list.append(getNetworkInformation(zkhandler, net))
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
else:
|
|
net_list.append(getNetworkInformation(zkhandler, net))
|
|
|
|
return True, net_list
|
|
|
|
|
|
def get_list_dhcp(zkhandler, network, limit, only_static=False, is_fuzzy=True):
|
|
# Validate and obtain alternate passed value
|
|
net_vni = getNetworkVNI(zkhandler, network)
|
|
if not net_vni:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
dhcp_list = []
|
|
|
|
if only_static:
|
|
full_dhcp_list = getNetworkDHCPReservations(zkhandler, net_vni)
|
|
else:
|
|
full_dhcp_list = getNetworkDHCPReservations(zkhandler, net_vni)
|
|
full_dhcp_list += getNetworkDHCPLeases(zkhandler, net_vni)
|
|
|
|
if limit:
|
|
try:
|
|
if not is_fuzzy:
|
|
limit = '^' + limit + '$'
|
|
|
|
# Implcitly assume fuzzy limits
|
|
if not re.match(r'\^.*', limit):
|
|
limit = '.*' + limit
|
|
if not re.match(r'.*\$', limit):
|
|
limit = limit + '.*'
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
|
|
for lease in full_dhcp_list:
|
|
valid_lease = False
|
|
if limit:
|
|
if re.match(limit, lease):
|
|
valid_lease = True
|
|
if re.match(limit, lease):
|
|
valid_lease = True
|
|
else:
|
|
valid_lease = True
|
|
|
|
if valid_lease:
|
|
dhcp_list.append(getDHCPLeaseInformation(zkhandler, net_vni, lease))
|
|
|
|
return True, dhcp_list
|
|
|
|
|
|
def get_list_acl(zkhandler, network, limit, direction, is_fuzzy=True):
|
|
# Validate and obtain alternate passed value
|
|
net_vni = getNetworkVNI(zkhandler, network)
|
|
if not net_vni:
|
|
return False, 'ERROR: Could not find network "{}" in the cluster!'.format(network)
|
|
|
|
# Change direction to something more usable
|
|
if direction is None:
|
|
direction = "both"
|
|
elif direction is True:
|
|
direction = "in"
|
|
elif direction is False:
|
|
direction = "out"
|
|
|
|
acl_list = []
|
|
full_acl_list = getNetworkACLs(zkhandler, net_vni, direction)
|
|
|
|
if limit:
|
|
try:
|
|
if not is_fuzzy:
|
|
limit = '^' + limit + '$'
|
|
|
|
# Implcitly assume fuzzy limits
|
|
if not re.match(r'\^.*', limit):
|
|
limit = '.*' + limit
|
|
if not re.match(r'.*\$', limit):
|
|
limit = limit + '.*'
|
|
except Exception as e:
|
|
return False, 'Regex Error: {}'.format(e)
|
|
|
|
for acl in full_acl_list:
|
|
valid_acl = False
|
|
if limit:
|
|
if re.match(limit, acl['description']):
|
|
valid_acl = True
|
|
else:
|
|
valid_acl = True
|
|
|
|
if valid_acl:
|
|
acl_list.append(acl)
|
|
|
|
return True, acl_list
|