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authorChristian Poessinger <christian@poessinger.com>2019-09-07 12:29:12 +0200
committerChristian Poessinger <christian@poessinger.com>2019-09-20 21:28:53 +0200
commita610e328750e3cfc23c29a2cafb40d7ef7082b13 (patch)
tree5cbdc864b0d036b92bb3ef60d3246b879016a187 /src/conf_mode/interface-ethernet.py
parent4ae44c074e15fa102718d5a4512c23db447d6dc8 (diff)
downloadvyos-1x-a610e328750e3cfc23c29a2cafb40d7ef7082b13.tar.gz
vyos-1x-a610e328750e3cfc23c29a2cafb40d7ef7082b13.zip
ethernet: T1637: initial rewrite in XML/Python style
Diffstat (limited to 'src/conf_mode/interface-ethernet.py')
-rwxr-xr-xsrc/conf_mode/interface-ethernet.py298
1 files changed, 298 insertions, 0 deletions
diff --git a/src/conf_mode/interface-ethernet.py b/src/conf_mode/interface-ethernet.py
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+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+
+from copy import deepcopy
+from sys import exit
+
+from vyos.ifconfig import EthernetIf, VLANIf
+from vyos.configdict import list_diff, vlan_to_dict
+from vyos.config import Config
+from vyos import ConfigError
+
+default_config_data = {
+ 'address': [],
+ 'address_remove': [],
+ 'description': '',
+ 'deleted': False,
+ 'dhcp_client_id': '',
+ 'dhcp_hostname': '',
+ 'dhcpv6_prm_only': False,
+ 'dhcpv6_temporary': False,
+ 'disable': False,
+ 'disable_link_detect': 1,
+ 'hw_id': '',
+ 'ip_arp_cache_tmo': 30,
+ 'ip_proxy_arp': 0,
+ 'ip_proxy_arp_pvlan': 0,
+ 'intf': '',
+ 'mac': '',
+ 'mtu': 1500,
+ 'vif_s': [],
+ 'vif_s_remove': [],
+ 'vif': [],
+ 'vif_remove': []
+}
+
+
+def apply_vlan_config(vlan, config):
+ """
+ Generic function to apply a VLAN configuration from a dictionary
+ to a VLAN interface
+ """
+
+ if type(vlan) != type(VLANIf("lo")):
+ raise TypeError()
+
+ # update interface description used e.g. within SNMP
+ vlan.ifalias = config['description']
+ # ignore link state changes
+ vlan.link_detect = config['disable_link_detect']
+ # Maximum Transmission Unit (MTU)
+ vlan.mtu = config['mtu']
+ # Change VLAN interface MAC address
+ if config['mac']:
+ vlan.mac = config['mac']
+
+ # enable/disable VLAN interface
+ if config['disable']:
+ vlan.state = 'down'
+ else:
+ vlan.state = 'up'
+
+ # Configure interface address(es)
+ # - not longer required addresses get removed first
+ # - newly addresses will be added second
+ for addr in config['address_remove']:
+ vlan.del_addr(addr)
+ for addr in config['address']:
+ vlan.add_addr(addr)
+
+
+def get_config():
+ eth = deepcopy(default_config_data)
+ conf = Config()
+
+ # determine tagNode instance
+ try:
+ eth['intf'] = os.environ['VYOS_TAGNODE_VALUE']
+ except KeyError as E:
+ print("Interface not specified")
+
+ # check if ethernet interface has been removed
+ cfg_base = 'interfaces ethernet ' + eth['intf']
+ if not conf.exists(cfg_base):
+ eth['deleted'] = True
+ # we can not bail out early as ethernet interface can not be removed
+ # Kernel will complain with: RTNETLINK answers: Operation not supported.
+ # Thus we need to remove individual settings
+ return eth
+
+ # set new configuration level
+ conf.set_level(cfg_base)
+
+ # retrieve configured interface addresses
+ if conf.exists('address'):
+ eth['address'] = conf.return_values('address')
+
+ # get interface addresses (currently effective) - to determine which
+ # address is no longer valid and needs to be removed
+ eff_addr = conf.return_effective_values('address')
+ eth['address_remove'] = list_diff(eff_addr, eth['address'])
+
+ # retrieve interface description
+ if conf.exists('description'):
+ eth['description'] = conf.return_value('description')
+ else:
+ eth['description'] = eth['intf']
+
+ # get DHCP client identifier
+ if conf.exists('dhcp-options client-id'):
+ eth['dhcp_client_id'] = conf.return_value('dhcp-options client-id')
+
+ # DHCP client host name (overrides the system host name)
+ if conf.exists('dhcp-options host-name'):
+ eth['dhcp_hostname'] = conf.return_value('dhcp-options host-name')
+
+ # DHCPv6 only acquire config parameters, no address
+ if conf.exists('dhcpv6-options parameters-only'):
+ eth['dhcpv6_prm_only'] = conf.return_value('dhcpv6-options parameters-only')
+
+ # DHCPv6 temporary IPv6 address
+ if conf.exists('dhcpv6-options temporary'):
+ eth['dhcpv6_temporary'] = conf.return_value('dhcpv6-options temporary')
+
+ # ignore link state changes
+ if conf.exists('disable-link-detect'):
+ eth['disable_link_detect'] = 2
+
+ # disable interface
+ if conf.exists('disable'):
+ eth['disable'] = True
+
+ # ARP cache entry timeout in seconds
+ if conf.exists('ip arp-cache-timeout'):
+ eth['ip_arp_cache_tmo'] = int(conf.return_value('ip arp-cache-timeout'))
+
+ # Enable proxy-arp on this interface
+ if conf.exists('ip enable-proxy-arp'):
+ eth['ip_proxy_arp'] = 1
+
+ # Enable private VLAN proxy ARP on this interface
+ if conf.exists('ip proxy-arp-pvlan'):
+ eth['ip_proxy_arp_pvlan'] = 1
+
+ # Media Access Control (MAC) address
+ if conf.exists('mac'):
+ eth['mac'] = conf.return_value('mac')
+
+ # Maximum Transmission Unit (MTU)
+ if conf.exists('mtu'):
+ eth['mtu'] = int(conf.return_value('mtu'))
+
+ # re-set configuration level and retrieve vif-s interfaces
+ conf.set_level(cfg_base)
+ # get vif-s interfaces (currently effective) - to determine which vif-s
+ # interface is no longer present and needs to be removed
+ eff_intf = conf.list_effective_nodes('vif-s')
+ act_intf = conf.list_nodes('vif-s')
+ eth['vif_s_remove'] = list_diff(eff_intf, act_intf)
+
+ if conf.exists('vif-s'):
+ for vif_s in conf.list_nodes('vif-s'):
+ # set config level to vif-s interface
+ conf.set_level(cfg_base + ' vif-s ' + vif_s)
+ eth['vif_s'].append(vlan_to_dict(conf))
+
+ # re-set configuration level and retrieve vif-s interfaces
+ conf.set_level(cfg_base)
+ # Determine vif interfaces (currently effective) - to determine which
+ # vif interface is no longer present and needs to be removed
+ eff_intf = conf.list_effective_nodes('vif')
+ act_intf = conf.list_nodes('vif')
+ eth['vif_remove'] = list_diff(eff_intf, act_intf)
+
+ if conf.exists('vif'):
+ for vif in conf.list_nodes('vif'):
+ # set config level to vif interface
+ conf.set_level(cfg_base + ' vif ' + vif)
+ eth['vif'].append(vlan_to_dict(conf))
+
+ return eth
+
+
+def verify(eth):
+ conf = Config()
+ # some options can not be changed when interface is enslaved to a bond
+ for bond in conf.list_nodes('interfaces bonding'):
+ if conf.exists('interfaces bonding ' + bond + ' member interface'):
+ if eth['name'] in conf.return_values('interfaces bonding ' + bond + ' member interface'):
+ if eth['disable']:
+ raise ConfigError('Can not disable interface {} which is a member of {}').format(eth['intf'], bond)
+
+ if eth['address']:
+ raise ConfigError('Can not assign address to interface {} which is a member of {}').format(eth['intf'], bond)
+
+
+ return None
+
+
+def generate(eth):
+ import pprint
+ pprint.pprint(eth)
+ return None
+
+
+def apply(eth):
+ e = EthernetIf(eth['intf'])
+ # update interface description used e.g. within SNMP
+ e.ifalias = eth['description']
+
+ #
+ # missing DHCP/DHCPv6 options go here
+ #
+
+ # ignore link state changes
+ e.link_detect = eth['disable_link_detect']
+ # configure ARP cache timeout in milliseconds
+ e.arp_cache_tmp = eth['ip_arp_cache_tmo']
+ # Enable proxy-arp on this interface
+ e.proxy_arp = eth['ip_proxy_arp']
+ # Enable private VLAN proxy ARP on this interface
+ e.proxy_arp_pvlan = eth['ip_proxy_arp_pvlan']
+
+ # Change interface MAC address
+ if eth['mac']:
+ e.mac = eth['mac']
+
+ # Maximum Transmission Unit (MTU)
+ e.mtu = eth['mtu']
+
+ # Configure interface address(es)
+ # - not longer required addresses get removed first
+ # - newly addresses will be added second
+ for addr in eth['address_remove']:
+ e.del_addr(addr)
+ for addr in eth['address']:
+ e.add_addr(addr)
+
+ # Enable/Disable interface
+ if eth['disable']:
+ e.state = 'down'
+ else:
+ e.state = 'up'
+
+ # remove no longer required service VLAN interfaces (vif-s)
+ for vif_s in eth['vif_s_remove']:
+ e.del_vlan(vif_s)
+
+ # create service VLAN interfaces (vif-s)
+ for vif_s in eth['vif_s']:
+ s_vlan = e.add_vlan(vif_s['id'], ethertype=vif_s['ethertype'])
+ apply_vlan_config(s_vlan, vif_s)
+
+ # remove no longer required client VLAN interfaces (vif-c)
+ # on lower service VLAN interface
+ for vif_c in vif_s['vif_c_remove']:
+ s_vlan.del_vlan(vif_c)
+
+ # create client VLAN interfaces (vif-c)
+ # on lower service VLAN interface
+ for vif_c in vif_s['vif_c']:
+ c_vlan = s_vlan.add_vlan(vif_c['id'])
+ apply_vlan_config(c_vlan, vif_c)
+
+ # remove no longer required VLAN interfaces (vif)
+ for vif in eth['vif_remove']:
+ e.del_vlan(vif)
+
+ # create VLAN interfaces (vif)
+ for vif in eth['vif']:
+ vlan = e.add_vlan(vif['id'])
+ apply_vlan_config(vlan, vif)
+
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ exit(1)