diff options
Diffstat (limited to 'src')
| -rwxr-xr-x | src/conf_mode/interface-bridge.py | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/src/conf_mode/interface-bridge.py b/src/conf_mode/interface-bridge.py new file mode 100755 index 000000000..f7f70b15d --- /dev/null +++ b/src/conf_mode/interface-bridge.py @@ -0,0 +1,227 @@ +#!/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 +import sys +import copy +import subprocess + +import vyos.configinterface as VyIfconfig + +from vyos.config import Config +from vyos import ConfigError + +default_config_data = { + 'address': [], + 'aging': '300', + 'br_name': '', + 'description': '', + 'deleted': False, + 'dhcp_client_id': '', + 'dhcp_hostname': '', + 'dhcpv6_parameters_only': False, + 'dhcpv6_temporary': False, + 'disable': False, + 'disable_link_detect': False, + 'forwarding_delay': '15', + 'hello_time': '2', + 'igmp_querier': 0, + 'arp_cache_timeout_ms': '30000', + 'mac' : '', + 'max_age': '20', + 'priority': '32768', + 'stp': 'off' +} + +def subprocess_cmd(command): + process = subprocess.Popen(command,stdout=subprocess.PIPE, shell=True) + proc_stdout = process.communicate()[0].strip() + print(proc_stdout) + +def get_config(): + bridge = copy.deepcopy(default_config_data) + conf = Config() + + # determine tagNode instance + try: + bridge['br_name'] = os.environ['VYOS_TAGNODE_VALUE'] + print("Executing script for interface: " + bridge['br_name']) + except KeyError as E: + print("Interface not specified") + + # Check if bridge has been removed + if not conf.exists('interfaces bridge ' + bridge['br_name']): + bridge['deleted'] = True + return bridge + + # set new configuration level + conf.set_level('interfaces bridge ' + bridge['br_name']) + + # retrieve configured interface addresses + if conf.exists('address'): + bridge['address'] = conf.return_values('address') + + # retrieve aging - how long addresses are retained + if conf.exists('aging'): + bridge['aging'] = conf.return_value('aging') + + # retrieve interface description + if conf.exists('description'): + bridge['description'] = conf.return_value('description') + + # DHCP client identifier + if conf.exists('dhcp-options client-id'): + bridge['dhcp_client_id'] = conf.return_value('dhcp-options client-id') + + # DHCP client hostname + if conf.exists('dhcp-options host-name'): + bridge['dhcp_hostname'] = conf.return_value('dhcp-options host-name') + + # DHCPv6 acquire only config parameters, no address + if conf.exists('dhcpv6-options parameters-only'): + bridge['dhcpv6_parameters_only'] = True + + # DHCPv6 IPv6 "temporary" address + if conf.exists('dhcpv6-options temporary'): + bridge['dhcpv6_temporary'] = True + + # Disable this bridge interface + if conf.exists('disable'): + bridge['disable'] = True + + # Ignore link state changes + if conf.exists('disable-link-detect'): + bridge['disable_link_detect'] = True + + # Forwarding delay + if conf.exists('forwarding-delay'): + bridge['forwarding_delay'] = conf.return_value('forwarding-delay') + + # Hello packet advertisment interval + if conf.exists('hello-time'): + bridge['hello_time'] = conf.return_value('hello-time') + + # Enable or disable IGMP querier + if conf.exists('igmp-snooping querier'): + tmp = conf.return_value('igmp-snooping querier') + if tmp == "enable": + bridge['igmp_querier'] = 1 + + # ARP cache entry timeout in seconds + if conf.exists('ip arp-cache-timeout'): + tmp = 1000 * int(conf.return_value('ip arp-cache-timeout')) + bridge['arp_cache_timeout_ms'] = str(tmp) + + # Media Access Control (MAC) address + if conf.exists('mac'): + bridge['mac'] = conf.return_value('mac') + + # Interval at which neighbor bridges are removed + if conf.exists('max-age'): + bridge['max_age'] = conf.return_value('max-age') + + # Priority for this bridge + if conf.exists('priority'): + bridge['priority'] = conf.return_value('priority') + + # Enable spanning tree protocol + if conf.exists('stp'): + tmp = conf.return_value('stp') + if tmp == "true": + bridge['stp'] = 'on' + + return bridge + +def verify(bridge): + if bridge is None: + return None + + return None + +def generate(bridge): + if bridge is None: + return None + + return None + +def apply(bridge): + if bridge is None: + return None + + if bridge['deleted']: + # bridges need to be shutdown first + os.system("ip link set dev {0} down".format(bridge['br_name'])) + # delete bridge + os.system("brctl delbr {0}".format(bridge['br_name'])) + else: + # create bridge if it does not exist + if not os.path.exists("/sys/class/net/" + bridge['br_name']): + os.system("brctl addbr {0}".format(bridge['br_name'])) + + # assemble bridge configuration + # configuration is passed via subprocess to brctl + cmd = '' + + # set ageing time + cmd += 'brctl setageing {0} {1}'.format(bridge['br_name'], bridge['aging']) + cmd += ' && ' + + # set bridge forward delay + cmd += 'brctl setfd {0} {1}'.format(bridge['br_name'], bridge['forwarding_delay']) + cmd += ' && ' + + # set hello time + cmd += 'brctl sethello {0} {1}'.format(bridge['br_name'], bridge['hello_time']) + cmd += ' && ' + + # set max message age + cmd += 'brctl setmaxage {0} {1}'.format(bridge['br_name'], bridge['max_age']) + cmd += ' && ' + + # set bridge priority + cmd += 'brctl setbridgeprio {0} {1}'.format(bridge['br_name'], bridge['priority']) + cmd += ' && ' + + # turn stp on/off + cmd += 'brctl stp {0} {1}'.format(bridge['br_name'], bridge['stp']) + + subprocess_cmd(cmd) + + # update interface description used e.g. within SNMP + VyIfconfig.set_description(bridge['br_name'], bridge['description']) + + # Ignore link state changes? + VyIfconfig.set_link_detect(bridge['br_name'], bridge['disable_link_detect']) + + # enable or disable IGMP querier + VyIfconfig.set_multicast_querier(bridge['br_name'], bridge['igmp_querier']) + + # ARP cache entry timeout in seconds + VyIfconfig.set_arp_cache_timeout(bridge['br_name'], bridge['arp_cache_timeout_ms']) + + return None + +if __name__ == '__main__': + try: + c = get_config() + verify(c) + generate(c) + apply(c) + except ConfigError as e: + print(e) + sys.exit(1) |