diff options
Diffstat (limited to 'src/conf_mode/interfaces-l2tpv3.py')
| -rwxr-xr-x | src/conf_mode/interfaces-l2tpv3.py | 267 |
1 files changed, 52 insertions, 215 deletions
diff --git a/src/conf_mode/interfaces-l2tpv3.py b/src/conf_mode/interfaces-l2tpv3.py index 4ff0bcb57..8250a3df8 100755 --- a/src/conf_mode/interfaces-l2tpv3.py +++ b/src/conf_mode/interfaces-l2tpv3.py @@ -21,200 +21,68 @@ from copy import deepcopy from netifaces import interfaces from vyos.config import Config -from vyos.ifconfig import L2TPv3If, Interface +from vyos.configdict import get_interface_dict +from vyos.configdict import leaf_node_changed +from vyos.configverify import verify_address +from vyos.configverify import verify_bridge_delete +from vyos.ifconfig import L2TPv3If +from vyos.util import check_kmod +from vyos.validate import is_addr_assigned from vyos import ConfigError -from vyos.util import call -from vyos.validate import is_member, is_addr_assigned - from vyos import airbag airbag.enable() -default_config_data = { - 'address': [], - 'deleted': False, - 'description': '', - 'disable': False, - 'encapsulation': 'udp', - 'local_address': '', - 'local_port': 5000, - 'intf': '', - 'ipv6_accept_ra': 1, - 'ipv6_autoconf': 0, - 'ipv6_eui64_prefix': [], - 'ipv6_forwarding': 1, - 'ipv6_dup_addr_detect': 1, - 'is_bridge_member': False, - 'mtu': 1488, - 'peer_session_id': '', - 'peer_tunnel_id': '', - 'remote_address': '', - 'remote_port': 5000, - 'session_id': '', - 'tunnel_id': '' -} - -def check_kmod(): - modules = ['l2tp_eth', 'l2tp_netlink', 'l2tp_ip', 'l2tp_ip6'] - for module in modules: - if not os.path.exists(f'/sys/module/{module}'): - if call(f'modprobe {module}') != 0: - raise ConfigError(f'Loading Kernel module {module} failed') - -def get_config(): - l2tpv3 = deepcopy(default_config_data) - conf = Config() - - # determine tagNode instance - if 'VYOS_TAGNODE_VALUE' not in os.environ: - raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified') - - l2tpv3['intf'] = os.environ['VYOS_TAGNODE_VALUE'] - - # check if interface is member of a bridge - l2tpv3['is_bridge_member'] = is_member(conf, l2tpv3['intf'], 'bridge') - - # Check if interface has been removed - if not conf.exists('interfaces l2tpv3 ' + l2tpv3['intf']): - l2tpv3['deleted'] = True - interface = l2tpv3['intf'] - - # to delete the l2tpv3 interface we need the current tunnel_id and session_id - if conf.exists_effective(f'interfaces l2tpv3 {interface} tunnel-id'): - l2tpv3['tunnel_id'] = conf.return_effective_value(f'interfaces l2tpv3 {interface} tunnel-id') - - if conf.exists_effective(f'interfaces l2tpv3 {interface} session-id'): - l2tpv3['session_id'] = conf.return_effective_value(f'interfaces l2tpv3 {interface} session-id') - - return l2tpv3 - - # set new configuration level - conf.set_level('interfaces l2tpv3 ' + l2tpv3['intf']) - - # retrieve configured interface addresses - if conf.exists('address'): - l2tpv3['address'] = conf.return_values('address') - - # retrieve interface description - if conf.exists('description'): - l2tpv3['description'] = conf.return_value('description') - - # get tunnel destination port - if conf.exists('destination-port'): - l2tpv3['remote_port'] = int(conf.return_value('destination-port')) - - # Disable this interface - if conf.exists('disable'): - l2tpv3['disable'] = True - - # get tunnel encapsulation type - if conf.exists('encapsulation'): - l2tpv3['encapsulation'] = conf.return_value('encapsulation') - - # get tunnel local ip address - if conf.exists('local-ip'): - l2tpv3['local_address'] = conf.return_value('local-ip') - - # Enable acquisition of IPv6 address using stateless autoconfig (SLAAC) - if conf.exists('ipv6 address autoconf'): - l2tpv3['ipv6_autoconf'] = 1 - - # Get prefixes for IPv6 addressing based on MAC address (EUI-64) - if conf.exists('ipv6 address eui64'): - l2tpv3['ipv6_eui64_prefix'] = conf.return_values('ipv6 address eui64') +k_mod = ['l2tp_eth', 'l2tp_netlink', 'l2tp_ip', 'l2tp_ip6'] - # Remove the default link-local address if set. - if not ( conf.exists('ipv6 address no-default-link-local') or - l2tpv3['is_bridge_member'] ): - # add the link-local by default to make IPv6 work - l2tpv3['ipv6_eui64_prefix'].append('fe80::/64') - # Disable IPv6 forwarding on this interface - if conf.exists('ipv6 disable-forwarding'): - l2tpv3['ipv6_forwarding'] = 0 +def get_config(config=None): + """ + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag + """ + if config: + conf = config + else: + conf = Config() + base = ['interfaces', 'l2tpv3'] + l2tpv3 = get_interface_dict(conf, base) - # IPv6 Duplicate Address Detection (DAD) tries - if conf.exists('ipv6 dup-addr-detect-transmits'): - l2tpv3['ipv6_dup_addr_detect'] = int(conf.return_value('ipv6 dup-addr-detect-transmits')) + # L2TPv3 is "special" the default MTU is 1488 - update accordingly + # as the config_level is already st in get_interface_dict() - we can use [] + tmp = conf.get_config_dict([], key_mangling=('-', '_'), get_first_key=True) + if 'mtu' not in tmp: + l2tpv3['mtu'] = '1488' - # to make IPv6 SLAAC and DHCPv6 work with forwarding=1, - # accept_ra must be 2 - if l2tpv3['ipv6_autoconf'] or 'dhcpv6' in l2tpv3['address']: - l2tpv3['ipv6_accept_ra'] = 2 + # To delete an l2tpv3 interface we need the current tunnel and session-id + if 'deleted' in l2tpv3: + tmp = leaf_node_changed(conf, ['tunnel-id']) + l2tpv3.update({'tunnel_id': tmp}) - # Maximum Transmission Unit (MTU) - if conf.exists('mtu'): - l2tpv3['mtu'] = int(conf.return_value('mtu')) - - # Remote session id - if conf.exists('peer-session-id'): - l2tpv3['peer_session_id'] = conf.return_value('peer-session-id') - - # Remote tunnel id - if conf.exists('peer-tunnel-id'): - l2tpv3['peer_tunnel_id'] = conf.return_value('peer-tunnel-id') - - # Remote address of L2TPv3 tunnel - if conf.exists('remote-ip'): - l2tpv3['remote_address'] = conf.return_value('remote-ip') - - # Local session id - if conf.exists('session-id'): - l2tpv3['session_id'] = conf.return_value('session-id') - - # get local tunnel port - if conf.exists('source-port'): - l2tpv3['local_port'] = conf.return_value('source-port') - - # get local tunnel id - if conf.exists('tunnel-id'): - l2tpv3['tunnel_id'] = conf.return_value('tunnel-id') + tmp = leaf_node_changed(conf, ['session-id']) + l2tpv3.update({'session_id': tmp}) return l2tpv3 - def verify(l2tpv3): - interface = l2tpv3['intf'] - - if l2tpv3['deleted']: - if l2tpv3['is_bridge_member']: - raise ConfigError(( - f'Interface "{l2tpv3["intf"]}" cannot be deleted as it is a ' - f'member of bridge "{l2tpv3["is_bridge_member"]}"!')) - + if 'deleted' in l2tpv3: + verify_bridge_delete(l2tpv3) return None - if not l2tpv3['local_address']: - raise ConfigError(f'Must configure the l2tpv3 local-ip for {interface}') - - if not is_addr_assigned(l2tpv3['local_address']): - raise ConfigError(f'Must use a configured IP on l2tpv3 local-ip for {interface}') + interface = l2tpv3['ifname'] - if not l2tpv3['remote_address']: - raise ConfigError(f'Must configure the l2tpv3 remote-ip for {interface}') + for key in ['local_ip', 'remote_ip', 'tunnel_id', 'peer_tunnel_id', + 'session_id', 'peer_session_id']: + if key not in l2tpv3: + tmp = key.replace('_', '-') + raise ConfigError(f'L2TPv3 {tmp} must be configured!') - if not l2tpv3['tunnel_id']: - raise ConfigError(f'Must configure the l2tpv3 tunnel-id for {interface}') - - if not l2tpv3['peer_tunnel_id']: - raise ConfigError(f'Must configure the l2tpv3 peer-tunnel-id for {interface}') - - if not l2tpv3['session_id']: - raise ConfigError(f'Must configure the l2tpv3 session-id for {interface}') - - if not l2tpv3['peer_session_id']: - raise ConfigError(f'Must configure the l2tpv3 peer-session-id for {interface}') - - if ( l2tpv3['is_bridge_member'] - and ( l2tpv3['address'] - or l2tpv3['ipv6_eui64_prefix'] - or l2tpv3['ipv6_autoconf'] ) ): - raise ConfigError(( - f'Cannot assign address to interface "{l2tpv3["intf"]}" ' - f'as it is a member of bridge "{l2tpv3["is_bridge_member"]}"!')) + if not is_addr_assigned(l2tpv3['local_ip']): + raise ConfigError('L2TPv3 local-ip address ' + '"{local_ip}" is not configured!'.format(**l2tpv3)) + verify_address(l2tpv3) return None - def generate(l2tpv3): return None @@ -225,65 +93,34 @@ def apply(l2tpv3): conf = deepcopy(L2TPv3If.get_config()) # Check if L2TPv3 interface already exists - if l2tpv3['intf'] in interfaces(): + if l2tpv3['ifname'] in interfaces(): # L2TPv3 is picky when changing tunnels/sessions, thus we can simply # always delete it first. conf['session_id'] = l2tpv3['session_id'] conf['tunnel_id'] = l2tpv3['tunnel_id'] - l = L2TPv3If(l2tpv3['intf'], **conf) + l = L2TPv3If(l2tpv3['ifname'], **conf) l.remove() - if not l2tpv3['deleted']: + if 'deleted' not in l2tpv3: conf['peer_tunnel_id'] = l2tpv3['peer_tunnel_id'] - conf['local_port'] = l2tpv3['local_port'] - conf['remote_port'] = l2tpv3['remote_port'] + conf['local_port'] = l2tpv3['source_port'] + conf['remote_port'] = l2tpv3['destination_port'] conf['encapsulation'] = l2tpv3['encapsulation'] - conf['local_address'] = l2tpv3['local_address'] - conf['remote_address'] = l2tpv3['remote_address'] + conf['local_address'] = l2tpv3['local_ip'] + conf['remote_address'] = l2tpv3['remote_ip'] conf['session_id'] = l2tpv3['session_id'] conf['tunnel_id'] = l2tpv3['tunnel_id'] conf['peer_session_id'] = l2tpv3['peer_session_id'] # Finally create the new interface - l = L2TPv3If(l2tpv3['intf'], **conf) - # update interface description used e.g. by SNMP - l.set_alias(l2tpv3['description']) - # Maximum Transfer Unit (MTU) - l.set_mtu(l2tpv3['mtu']) - # IPv6 accept RA - l.set_ipv6_accept_ra(l2tpv3['ipv6_accept_ra']) - # IPv6 address autoconfiguration - l.set_ipv6_autoconf(l2tpv3['ipv6_autoconf']) - # IPv6 forwarding - l.set_ipv6_forwarding(l2tpv3['ipv6_forwarding']) - # IPv6 Duplicate Address Detection (DAD) tries - l.set_ipv6_dad_messages(l2tpv3['ipv6_dup_addr_detect']) - - # Configure interface address(es) - no need to implicitly delete the - # old addresses as they have already been removed by deleting the - # interface above - for addr in l2tpv3['address']: - l.add_addr(addr) - - # IPv6 EUI-based addresses - for addr in l2tpv3['ipv6_eui64_prefix']: - l.add_ipv6_eui64_address(addr) - - # As the interface is always disabled first when changing parameters - # we will only re-enable the interface if it is not administratively - # disabled - if not l2tpv3['disable']: - l.set_admin_state('up') - - # re-add ourselves to any bridge we might have fallen out of - if l2tpv3['is_bridge_member']: - l.add_to_bridge(l2tpv3['is_bridge_member']) + l = L2TPv3If(l2tpv3['ifname'], **conf) + l.update(l2tpv3) return None if __name__ == '__main__': try: - check_kmod() + check_kmod(k_mod) c = get_config() verify(c) generate(c) |