# Copyright 2019 VyOS maintainers and contributors <maintainers@vyos.io> # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library 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 # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library. If not, see <http://www.gnu.org/licenses/>. import os import vyos.validate def validate_mac_address(addr): # a mac address consits out of 6 octets octets = len(addr.split(':')) if octets != 6: raise ValueError('wrong number of MAC octets: {} '.format(octets)) # validate against the first mac address byte if it's a multicast address if int(addr.split(':')[0]) & 1: raise ValueError('{} is a multicast MAC address'.format(addr)) # overall mac address is not allowed to be 00:00:00:00:00:00 if sum(int(i, 16) for i in addr.split(':')) == 0: raise ValueError('00:00:00:00:00:00 is not a valid MAC address') # check for VRRP mac address if addr.split(':')[0] == '0' and addr.split(':')[1] == '0' and addr.split(':')[2] == '94' and addr.split(':')[3] == '0' and addr.split(':')[4] == '1': raise ValueError('{} is a VRRP MAC address') pass def set_mac_address(intf, addr): """ Configure interface mac address using iproute2 command """ validate_mac_address(addr) os.system('ip link set {} address {}'.format(intf, addr)) pass def set_description(intf, desc): """ Sets the interface secription reported usually by SNMP """ with open('/sys/class/net/' + intf + '/ifalias', 'w') as f: f.write(desc) pass def set_arp_cache_timeout(intf, tmoMS): """ Configure the ARP cache entry timeout in milliseconds """ with open('/proc/sys/net/ipv4/neigh/' + intf + '/base_reachable_time_ms', 'w') as f: f.write(tmoMS) pass def set_multicast_querier(intf, enable): """ Sets whether the bridge actively runs a multicast querier or not. When a bridge receives a 'multicast host membership' query from another network host, that host is tracked based on the time that the query was received plus the multicast query interval time. use enable=1 to enable or enable=0 to disable """ if int(enable) >= 0 and int(enable) <= 1: with open('/sys/devices/virtual/net/' + intf + '/bridge/multicast_querier', 'w') as f: f.write(str(enable)) else: raise ValueError("malformed configuration string on interface {}: enable={}".format(intf, enable)) pass def set_link_detect(intf, enable): """ 0 - Allow packets to be received for the address on this interface even if interface is disabled or no carrier. 1 - Ignore packets received if interface associated with the incoming address is down. 2 - Ignore packets received if interface associated with the incoming address is down or has no carrier. Kernel Source: Documentation/networking/ip-sysctl.txt """ # Note can't use sysctl it is broken for vif name because of dots # link_filter values: # 0 - always receive # 1 - ignore receive if admin_down # 2 - ignore receive if admin_down or link down with open('/proc/sys/net/ipv4/conf/' + intf + '/link_filter', 'w') as f: if enable == True or enable == 1: f.write('2') if os.path.isfile('/usr/bin/vtysh'): os.system('/usr/bin/vtysh -c "configure terminal" -c "interface {}" -c "link-detect"'.format(intf)) else: f.write('1') if os.path.isfile('/usr/bin/vtysh'): os.system('/usr/bin/vtysh -c "configure terminal" -c "interface {}" -c "no link-detect"'.format(intf)) pass def add_interface_address(intf, addr): """ Configure an interface IPv4/IPv6 address """ if addr == "dhcp": os.system('/opt/vyatta/sbin/vyatta-interfaces.pl --dev="{}" --dhcp=start'.format(intf)) elif addr == "dhcpv6": os.system('/opt/vyatta/sbin/vyatta-dhcpv6-client.pl --start -ifname "{}"'.format(intf)) elif vyos.validate.is_ipv4(addr): if not vyos.validate.is_intf_addr_assigned(intf, addr): print("Assigning {} to {}".format(addr, intf)) os.system('sudo ip -4 addr add "{}" broadcast + dev "{}"'.format(addr, intf)) elif vyos.validate.is_ipv6(addr): if not vyos.validate.is_intf_addr_assigned(intf, addr): print("Assigning {} to {}".format(addr, intf)) os.system('sudo ip -6 addr add "{}" dev "{}"'.format(addr, intf)) else: raise ConfigError('{} is not a valid interface address'.format(addr)) pass def remove_interface_address(intf, addr): """ Remove IPv4/IPv6 address from given interface """ if addr == "dhcp": os.system('/opt/vyatta/sbin/vyatta-interfaces.pl --dev="{}" --dhcp=stop'.format(intf)) elif addr == "dhcpv6": os.system('/opt/vyatta/sbin/vyatta-dhcpv6-client.pl --stop -ifname "{}"'.format(intf)) elif vyos.validate.is_ipv4(addr): os.system('ip -4 addr del "{}" dev "{}"'.format(addr, intf)) elif vyos.validate.is_ipv6(addr): os.system('ip -6 addr del "{}" dev "{}"'.format(addr, intf)) else: raise ConfigError('{} is not a valid interface address'.format(addr)) pass