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+# 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/>.
+
+from copy import deepcopy
+
+from vyos import ConfigError
+from vyos.ifconfig.interface import Interface
+
+
+@Interface.register
+class VXLANIf(Interface):
+ """
+ The VXLAN protocol is a tunnelling protocol designed to solve the
+ problem of limited VLAN IDs (4096) in IEEE 802.1q. With VXLAN the
+ size of the identifier is expanded to 24 bits (16777216).
+
+ VXLAN is described by IETF RFC 7348, and has been implemented by a
+ number of vendors. The protocol runs over UDP using a single
+ destination port. This document describes the Linux kernel tunnel
+ device, there is also a separate implementation of VXLAN for
+ Openvswitch.
+
+ Unlike most tunnels, a VXLAN is a 1 to N network, not just point to
+ point. A VXLAN device can learn the IP address of the other endpoint
+ either dynamically in a manner similar to a learning bridge, or make
+ use of statically-configured forwarding entries.
+
+ For more information please refer to:
+ https://www.kernel.org/doc/Documentation/networking/vxlan.txt
+ """
+
+ default = {
+ 'type': 'vxlan',
+ 'group': '',
+ 'port': 8472, # The Linux implementation of VXLAN pre-dates
+ # the IANA's selection of a standard destination port
+ 'remote': '',
+ 'src_address': '',
+ 'src_interface': '',
+ 'vni': 0
+ }
+ definition = {
+ **Interface.definition,
+ **{
+ 'section': 'vxlan',
+ 'prefixes': ['vxlan', ],
+ 'bridgeable': True,
+ }
+ }
+ options = ['group', 'remote', 'src_interface', 'port', 'vni', 'src_address']
+
+ mapping = {
+ 'ifname': 'add',
+ 'vni': 'id',
+ 'port': 'dstport',
+ 'src_address': 'nolearning local',
+ }
+
+ def _create(self):
+ cmdline = set()
+ if self.config['remote']:
+ cmdline = ('ifname', 'type', 'remote', 'src_interface', 'vni', 'port')
+
+ elif self.config['src_address']:
+ cmdline = ('ifname', 'type', 'src_address', 'vni', 'port')
+
+ elif self.config['group'] and self.config['src_interface']:
+ cmdline = ('ifname', 'type', 'group', 'src_interface', 'vni', 'port')
+
+ else:
+ ifname = self.config['ifname']
+ raise ConfigError(
+ f'VXLAN "{ifname}" is missing mandatory underlay interface for a multicast network.')
+
+ cmd = 'ip link'
+ for key in cmdline:
+ value = self.config.get(key, '')
+ if not value:
+ continue
+ cmd += ' {} {}'.format(self.mapping.get(key, key), value)
+
+ self._cmd(cmd)
+
+ @classmethod
+ def get_config(cls):
+ """
+ VXLAN interfaces require a configuration when they are added using
+ iproute2. This static method will provide the configuration dictionary
+ used by this class.
+
+ Example:
+ >> dict = VXLANIf().get_config()
+ """
+ return deepcopy(cls.default)