diff options
Diffstat (limited to 'src/conf_mode/interfaces-vxlan.py')
| -rwxr-xr-x | src/conf_mode/interfaces-vxlan.py | 253 |
1 files changed, 35 insertions, 218 deletions
diff --git a/src/conf_mode/interfaces-vxlan.py b/src/conf_mode/interfaces-vxlan.py index 39db814b4..47c0bdcb8 100755 --- a/src/conf_mode/interfaces-vxlan.py +++ b/src/conf_mode/interfaces-vxlan.py @@ -21,197 +21,61 @@ from copy import deepcopy from netifaces import interfaces from vyos.config import Config +from vyos.configdict import get_interface_dict +from vyos.configverify import verify_address +from vyos.configverify import verify_bridge_delete +from vyos.configverify import verify_source_interface from vyos.ifconfig import VXLANIf, Interface -from vyos.validate import is_member from vyos import ConfigError - from vyos import airbag airbag.enable() -default_config_data = { - 'address': [], - 'deleted': False, - 'description': '', - 'disable': False, - 'group': '', - 'intf': '', - 'ip_arp_cache_tmo': 30, - 'ip_disable_arp_filter': 1, - 'ip_enable_arp_accept': 0, - 'ip_enable_arp_announce': 0, - 'ip_enable_arp_ignore': 0, - 'ip_proxy_arp': 0, - 'ipv6_accept_ra': 1, - 'ipv6_autoconf': 0, - 'ipv6_eui64_prefix': [], - 'ipv6_forwarding': 1, - 'ipv6_dup_addr_detect': 1, - 'is_bridge_member': False, - 'source_address': '', - 'source_interface': '', - 'mtu': 1450, - 'remote': '', - 'remote_port': 8472, # The Linux implementation of VXLAN pre-dates - # the IANA's selection of a standard destination port - 'vni': '' -} - def get_config(): - vxlan = deepcopy(default_config_data) + """ + Retrive CLI config as dictionary. Dictionary can never be empty, as at least the + interface name will be added or a deleted flag + """ conf = Config() + base = ['interfaces', 'vxlan'] + vxlan = get_interface_dict(conf, base) - # determine tagNode instance - if 'VYOS_TAGNODE_VALUE' not in os.environ: - raise ConfigError('Interface (VYOS_TAGNODE_VALUE) not specified') - - vxlan['intf'] = os.environ['VYOS_TAGNODE_VALUE'] - - # check if interface is member if a bridge - vxlan['is_bridge_member'] = is_member(conf, vxlan['intf'], 'bridge') - - # Check if interface has been removed - if not conf.exists('interfaces vxlan ' + vxlan['intf']): - vxlan['deleted'] = True - return vxlan - - # set new configuration level - conf.set_level('interfaces vxlan ' + vxlan['intf']) - - # retrieve configured interface addresses - if conf.exists('address'): - vxlan['address'] = conf.return_values('address') - - # retrieve interface description - if conf.exists('description'): - vxlan['description'] = conf.return_value('description') - - # Disable this interface - if conf.exists('disable'): - vxlan['disable'] = True - - # VXLAN multicast grou - if conf.exists('group'): - vxlan['group'] = conf.return_value('group') - - # ARP cache entry timeout in seconds - if conf.exists('ip arp-cache-timeout'): - vxlan['ip_arp_cache_tmo'] = int(conf.return_value('ip arp-cache-timeout')) - - # ARP filter configuration - if conf.exists('ip disable-arp-filter'): - vxlan['ip_disable_arp_filter'] = 0 - - # ARP enable accept - if conf.exists('ip enable-arp-accept'): - vxlan['ip_enable_arp_accept'] = 1 - - # ARP enable announce - if conf.exists('ip enable-arp-announce'): - vxlan['ip_enable_arp_announce'] = 1 - - # ARP enable ignore - if conf.exists('ip enable-arp-ignore'): - vxlan['ip_enable_arp_ignore'] = 1 - - # Enable proxy-arp on this interface - if conf.exists('ip enable-proxy-arp'): - vxlan['ip_proxy_arp'] = 1 - - # Enable acquisition of IPv6 address using stateless autoconfig (SLAAC) - if conf.exists('ipv6 address autoconf'): - vxlan['ipv6_autoconf'] = 1 - - # Get prefixes for IPv6 addressing based on MAC address (EUI-64) - if conf.exists('ipv6 address eui64'): - vxlan['ipv6_eui64_prefix'] = conf.return_values('ipv6 address eui64') - - # Remove the default link-local address if set. - if not ( conf.exists('ipv6 address no-default-link-local') - or vxlan['is_bridge_member'] ): - # add the link-local by default to make IPv6 work - vxlan['ipv6_eui64_prefix'].append('fe80::/64') - - # Disable IPv6 forwarding on this interface - if conf.exists('ipv6 disable-forwarding'): - vxlan['ipv6_forwarding'] = 0 - - # IPv6 Duplicate Address Detection (DAD) tries - if conf.exists('ipv6 dup-addr-detect-transmits'): - vxlan['ipv6_dup_addr_detect'] = int(conf.return_value('ipv6 dup-addr-detect-transmits')) - - # to make IPv6 SLAAC and DHCPv6 work with forwarding=1, - # accept_ra must be 2 - if vxlan['ipv6_autoconf'] or 'dhcpv6' in vxlan['address']: - vxlan['ipv6_accept_ra'] = 2 - - # VXLAN source address - if conf.exists('source-address'): - vxlan['source_address'] = conf.return_value('source-address') - - # VXLAN underlay interface - if conf.exists('source-interface'): - vxlan['source_interface'] = conf.return_value('source-interface') - - # Maximum Transmission Unit (MTU) - if conf.exists('mtu'): - vxlan['mtu'] = int(conf.return_value('mtu')) - - # Remote address of VXLAN tunnel - if conf.exists('remote'): - vxlan['remote'] = conf.return_value('remote') - - # Remote port of VXLAN tunnel - if conf.exists('port'): - vxlan['remote_port'] = int(conf.return_value('port')) - - # Virtual Network Identifier - if conf.exists('vni'): - vxlan['vni'] = conf.return_value('vni') + # VXLAN is "special" the default MTU is 1492 - 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: + vxlan['mtu'] = '1450' return vxlan - def verify(vxlan): - if vxlan['deleted']: - if vxlan['is_bridge_member']: - raise ConfigError(( - f'Cannot delete interface "{vxlan["intf"]}" as it is a ' - f'member of bridge "{vxlan["is_bridge_member"]}"!')) - + if 'deleted' in vxlan: + verify_bridge_delete(vxlan) return None - if vxlan['mtu'] < 1500: + if int(vxlan['mtu']) < 1500: print('WARNING: RFC7348 recommends VXLAN tunnels preserve a 1500 byte MTU') - if vxlan['group']: - if not vxlan['source_interface']: + if 'group' in vxlan: + if 'source_interface' not in vxlan: raise ConfigError('Multicast VXLAN requires an underlaying interface ') - if not vxlan['source_interface'] in interfaces(): - raise ConfigError('VXLAN source interface does not exist') + verify_source_interface(vxlan) - if not (vxlan['group'] or vxlan['remote'] or vxlan['source_address']): + if not any(tmp in ['group', 'remote', 'source_address'] for tmp in vxlan): raise ConfigError('Group, remote or source-address must be configured') - if not vxlan['vni']: + if 'vni' not in vxlan: raise ConfigError('Must configure VNI for VXLAN') - if vxlan['source_interface']: + if 'source_interface' in vxlan: # VXLAN adds a 50 byte overhead - we need to check the underlaying MTU # if our configured MTU is at least 50 bytes less underlay_mtu = int(Interface(vxlan['source_interface']).get_mtu()) - if underlay_mtu < (vxlan['mtu'] + 50): + if underlay_mtu < (int(vxlan['mtu']) + 50): raise ConfigError('VXLAN has a 50 byte overhead, underlaying device ' \ - 'MTU is to small ({})'.format(underlay_mtu)) - - if ( vxlan['is_bridge_member'] - and ( vxlan['address'] - or vxlan['ipv6_eui64_prefix'] - or vxlan['ipv6_autoconf'] ) ): - raise ConfigError(( - f'Cannot assign address to interface "{vxlan["intf"]}" ' - f'as it is a member of bridge "{vxlan["is_bridge_member"]}"!')) + f'MTU is to small ({underlay_mtu} bytes)') + verify_address(vxlan) return None @@ -221,73 +85,26 @@ def generate(vxlan): def apply(vxlan): # Check if the VXLAN interface already exists - if vxlan['intf'] in interfaces(): - v = VXLANIf(vxlan['intf']) + if vxlan['ifname'] in interfaces(): + v = VXLANIf(vxlan['ifname']) # VXLAN is super picky and the tunnel always needs to be recreated, # thus we can simply always delete it first. v.remove() - if not vxlan['deleted']: + if 'deleted' not in vxlan: # VXLAN interface needs to be created on-block # instead of passing a ton of arguments, I just use a dict # that is managed by vyos.ifconfig conf = deepcopy(VXLANIf.get_config()) # Assign VXLAN instance configuration parameters to config dict - conf['vni'] = vxlan['vni'] - conf['group'] = vxlan['group'] - conf['src_address'] = vxlan['source_address'] - conf['src_interface'] = vxlan['source_interface'] - conf['remote'] = vxlan['remote'] - conf['port'] = vxlan['remote_port'] + for tmp in ['vni', 'group', 'source_address', 'source_interface', 'remote', 'port']: + if tmp in vxlan: + conf[tmp] = vxlan[tmp] # Finally create the new interface - v = VXLANIf(vxlan['intf'], **conf) - # update interface description used e.g. by SNMP - v.set_alias(vxlan['description']) - # Maximum Transfer Unit (MTU) - v.set_mtu(vxlan['mtu']) - - # configure ARP cache timeout in milliseconds - v.set_arp_cache_tmo(vxlan['ip_arp_cache_tmo']) - # configure ARP filter configuration - v.set_arp_filter(vxlan['ip_disable_arp_filter']) - # configure ARP accept - v.set_arp_accept(vxlan['ip_enable_arp_accept']) - # configure ARP announce - v.set_arp_announce(vxlan['ip_enable_arp_announce']) - # configure ARP ignore - v.set_arp_ignore(vxlan['ip_enable_arp_ignore']) - # Enable proxy-arp on this interface - v.set_proxy_arp(vxlan['ip_proxy_arp']) - # IPv6 accept RA - v.set_ipv6_accept_ra(vxlan['ipv6_accept_ra']) - # IPv6 address autoconfiguration - v.set_ipv6_autoconf(vxlan['ipv6_autoconf']) - # IPv6 forwarding - v.set_ipv6_forwarding(vxlan['ipv6_forwarding']) - # IPv6 Duplicate Address Detection (DAD) tries - v.set_ipv6_dad_messages(vxlan['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 vxlan['address']: - v.add_addr(addr) - - # IPv6 EUI-based addresses - for addr in vxlan['ipv6_eui64_prefix']: - v.add_ipv6_eui64_address(addr) - - # As the VXLAN interface is always disabled first when changing - # parameters we will only re-enable the interface if it is not - # administratively disabled - if not vxlan['disable']: - v.set_admin_state('up') - - # re-add ourselves to any bridge we might have fallen out of - if vxlan['is_bridge_member']: - v.add_to_bridge(vxlan['is_bridge_member']) + v = VXLANIf(vxlan['ifname'], **conf) + v.update(vxlan) return None |