diff options
Diffstat (limited to 'src/conf_mode/dhcp_server.py')
| -rwxr-xr-x | src/conf_mode/dhcp_server.py | 90 |
1 files changed, 51 insertions, 39 deletions
diff --git a/src/conf_mode/dhcp_server.py b/src/conf_mode/dhcp_server.py index 0f92985a9..1458ed1d0 100755 --- a/src/conf_mode/dhcp_server.py +++ b/src/conf_mode/dhcp_server.py @@ -22,7 +22,8 @@ import ipaddress import jinja2 import socket import struct -import netifaces + +import vyos.validate from vyos.config import Config from vyos import ConfigError @@ -602,13 +603,13 @@ def verify(dhcp): # If DHCP is enabled we need one share-network if len(dhcp['shared_network']) == 0: - raise ConfigError('No DHCP shared networks configured.\n' + raise ConfigError('No DHCP shared networks configured.\n' \ 'At least one DHCP shared network must be configured.') # A shared-network requires a subnet definition for network in dhcp['shared_network']: if len(network['subnet']) == 0: - raise ConfigError('No DHCP lease subnets configured for "{0}". At least one\n' + raise ConfigError('No DHCP lease subnets configured for {0}. At least one\n' \ 'lease subnet must be configured for each shared network.'.format(network['name'])) # Inspect our subnet configuration @@ -620,59 +621,71 @@ def verify(dhcp): # Subnet static route declaration requires destination and router if subnet['static_subnet'] or subnet['static_router']: if not (subnet['static_subnet'] and subnet['static_router']): - raise ConfigError('Please specify the missing DHCP static-route parameter: destination-subnet | router') + raise ConfigError('Please specify missing DHCP static-route parameter(s):\n' \ + 'destination-subnet | router') # Failover requires all 4 parameters set if subnet['failover_local_addr'] or subnet['failover_peer_addr'] or subnet['failover_name'] or subnet['failover_status']: if not (subnet['failover_local_addr'] and subnet['failover_peer_addr'] and subnet['failover_name'] and subnet['failover_status']): - raise ConfigError('Please set one or more of the missing DHCP failover parameters: local-address | peer-address | name | status') + raise ConfigError('Please specify missing DHCP failover parameter(s):\n' \ + 'local-address | peer-address | name | status') # Failover names must be uniquie if subnet['failover_name'] in failover_names: - raise ConfigError('Failover names should be unique: "{0}" has already been configured.'.format(subnet['failover_name'])) + raise ConfigError('Failover names must be unique:\n' \ + '{0} has already been configured!'.format(subnet['failover_name'])) else: failover_names.append(subnet['failover_name']) # Failover requires start/stop ranges for pool if (len(subnet['range']) == 0): - raise ConfigError('Atleast one start-stop range must be configured for "{0}" to set up DHCP failover.'.format(subnet['network'])) + raise ConfigError('At least one start-stop range must be configured for {0}\n' \ + 'to set up DHCP failover!'.format(subnet['network'])) # Check if DHCP address range is inside configured subnet declaration range_start = [] range_stop = [] for range in subnet['range']: + start = range['start'] + stop = range['stop'] # DHCP stop IP required after start IP - if range['start'] and not range['stop']: - raise ConfigError('DHCP range stop IP not defined for range start IP "{0}".'.format(range['start'])) + if start and not stop: + raise ConfigError('Stop IP address in DHCP range for start {0} is not defined!'.format(start)) # Start address must be inside network - if not ipaddress.ip_address(range['start']) in ipaddress.ip_network(subnet['network']): - raise ConfigError('DHCP range start IP "{0}" is not in subnet "{1}" specified in network "{2}."'.format(range['start'], subnet['network'], network['name'])) + if not ipaddress.ip_address(start) in ipaddress.ip_network(subnet['network']): + raise ConfigError('Start IP address {0} of DHCP range is not in subnet {1}\n' \ + 'specified for shared network {2}!'.format(start, subnet['network'], network['name'])) # Stop address must be inside network - if not ipaddress.ip_address(range['stop']) in ipaddress.ip_network(subnet['network']): - raise ConfigError('DHCP range stop IP "{0}" is not in subnet "{1}" specified in network "{2}."'.format(range['stop'], subnet['network'], network['name'])) + if not ipaddress.ip_address(stop) in ipaddress.ip_network(subnet['network']): + raise ConfigError('Stop IP address {0} of DHCP range is not in subnet {1}\n' \ + 'specified for shared network {2}!'.format(stop, subnet['network'], network['name'])) # Stop address must be greater or equal to start address - if not ipaddress.ip_address(range['stop']) >= ipaddress.ip_address(range['start']): - raise ConfigError('DHCP range stop IP "{0}" should be an address greater or equal to the start address "{1}".'.format(range['stop'], range['start'])) + if not ipaddress.ip_address(stop) >= ipaddress.ip_address(start): + raise ConfigError('Stop IP address {0} of DHCP range should be greater or equal\n' \ + 'to the start IP address {1} of this range!'.format(stop, start)) # Range start address must be unique - if range['start'] in range_start: - raise ConfigError('Conflicting DHCP lease ranges: Pool start address "{0}" defined multipe times'.format(range['start'])) + if start in range_start: + raise ConfigError('Conflicting DHCP lease range:\n' \ + 'Pool start IP address {0} defined multipe times!'.format(range['start'])) else: - range_start.append(range['start']) + range_start.append(start) # Range stop address must be unique - if range['stop'] in range_stop: - raise ConfigError('Conflicting DHCP lease ranges: Pool stop address "{0}" defined multipe times'.format(range['stop'])) + if stop in range_stop: + raise ConfigError('Conflicting DHCP lease range:\n' \ + 'Pool stop IP address {0} defined multipe times!'.format(range['stop'])) else: - range_stop.append(range['stop']) + range_stop.append(stop) # Exclude addresses must be in bound for exclude in subnet['exclude']: if not ipaddress.ip_address(exclude) in ipaddress.ip_network(subnet['network']): - raise ConfigError('Exclude IP "{0}" is outside of the DHCP lease network "{1}" under shared network "{2}".'.format(exclude, subnet['network'], network['name'])) + raise ConfigError('Exclude IP address {0} is outside of the DHCP lease network {1}\n' \ + 'under shared network {2}!'.format(exclude, subnet['network'], network['name'])) # At least one DHCP address range or static-mapping required active_mapping = False @@ -685,39 +698,38 @@ def verify(dhcp): active_mapping = True if not active_mapping: - raise ConfigError('No DHCP address range or active static-mapping set for subnet "{0}".'.format(subnet['network'])) + raise ConfigError('No DHCP address range or active static-mapping set\n' \ + 'for subnet {0}!'.format(subnet['network'])) # Static IP address mappings require both an IP address and MAC address for mapping in subnet['static_mapping']: # Static IP address must be configured if not mapping['ip_address']: - raise ConfigError('No static lease IP address specified for static mapping "{0}" under shared network name "{1}".'.format(mapping['name'], network['name'])) + raise ConfigError('No static lease IP address specified for static mapping {0}\n' \ + 'under shared network name {1}!'.format(mapping['name'], network['name'])) # Static IP address must be in bound if not ipaddress.ip_address(mapping['ip_address']) in ipaddress.ip_network(subnet['network']): - raise ConfigError('Static DHCP lease IP "{0}" under static mapping "{1}" in shared network "{2}" is outside DHCP lease network "{3}".'.format(mapping['ip_address'], mapping['name'], network['name'], subnet['network'], )) + raise ConfigError('Static DHCP lease IP address {0} under static mapping {1}\n' \ + 'in shared network {2} is outside DHCP lease network {3}!' \ + .format(mapping['ip_address'], mapping['name'], network['name'], subnet['network'])) # Static mapping requires MAC address if not mapping['mac_address']: - raise ConfigError('No static lease MAC address specified for static mapping "{0}" under shared network name "{1}".'.format(mapping['name'], network['name'])) + raise ConfigError('No static lease MAC address specified for static mapping\n' \ + '{0} under shared network name {1}!'.format(mapping['name'], network['name'])) - # - # There must be one subnet connected to a real interface - # - for interface in netifaces.interfaces(): - # Test if IPv4 addresses are configured at all - if netifaces.AF_INET in netifaces.ifaddresses(interface).keys(): - # An interface can have multiple addresses, but ISC DHCP only supports the first :( - ip = netifaces.ifaddresses(interface)[netifaces.AF_INET][0]['addr'] - if ipaddress.ip_address(ip) in ipaddress.ip_network(subnet['network']): - # Bingo! At least one subnet connected to an interface on this machine - listen_ok = True + # There must be one subnet connected to a listen interface. + # This only counts if the network itself is not disabled! + if not network['disabled']: + if vyos.validate.is_subnet_connected(subnet['network'], primary=True): + listen_ok = True # # Subnets must be non overlapping # if subnet['network'] in subnets: - raise ConfigError('Subnets must be unique! "{0}" defined multiple times.'.format(subnet)) + raise ConfigError('Subnets must be unique! Subnet {0} defined multiple times!'.format(subnet)) else: subnets.append(subnet['network']) @@ -729,7 +741,7 @@ def verify(dhcp): net2 = ipaddress.ip_network(n) if (net.compare_networks(net2) != 0): if net.overlaps(net2): - raise ConfigError('Conflicting subnet ranges: "{0}" overlaps "{1}"'.format(net, net2)) + raise ConfigError('Conflicting subnet ranges: {0} overlaps with {1}'.format(net, net2)) if not listen_ok: raise ConfigError('None of the DHCP lease subnets are inside any configured subnet on\n' \ |