ifconfig: T2104: splt ifconfig.py into multiple files

1 files changed, 91 insertions, 0 deletions

diff --git a/python/vyos/ifconfig/vxlan.py b/python/vyos/ifconfig/vxlan.py
new file mode 100644
index 000000000..bc2ec508b
--- /dev/null
+++ b/python/vyos/ifconfig/vxlan.py
@@ -0,0 +1,91 @@
+# 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 vyos.ifconfig.interface import Interface
+
+
+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
+    """
+
+    options = ['group', 'remote', 'dev', 'port', 'vni']
+
+    default = {
+        'type': 'vxlan',
+        'vni': 0,
+        'dev': '',
+        'group': '',
+        'remote': '',
+        'port': 8472,   # The Linux implementation of VXLAN pre-dates
+                        # the IANA's selection of a standard destination port
+    }
+
+    def __init__(self, ifname, **kargs):
+        super().__init__(ifname, **kargs)
+
+    def _create(self):
+        # we assume that by default a multicast interface is created
+        group = 'group {}'.format(self.config['group'])
+
+        # if remote host is specified we ignore the multicast address
+        if self.config['remote']:
+            group = 'remote {}'.format(self.config['remote'])
+
+        # an underlay device is not always specified
+        dev = ''
+        if self.config['dev']:
+            dev = 'dev {}'.format(self.config['dev'])
+
+        cmd = 'ip link add {ifname} type vxlan id {vni} {group} {dev} dstport {port}'.format(
+            **config)
+        self._cmd(cmd)
+
+    @staticmethod
+    def get_config():
+        """
+        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()
+        """
+        config = {
+            'vni': 0,
+            'dev': '',
+            'group': '',
+            'port': 8472,  # The Linux implementation of VXLAN pre-dates
+            # the IANA's selection of a standard destination port
+            'remote': ''
+        }
+        return config