l2tpv3: T1923: implementation in XML/Python

Tested using:

R1:
---

set interfaces l2tpv3 l2tpeth10 address '2001:db8:beef::1/64'
set interfaces l2tpv3 l2tpeth10 address '100.0.0.1/24'
set interfaces l2tpv3 l2tpeth10 destination-port '3000'
set interfaces l2tpv3 l2tpeth10 encapsulation 'udp'
set interfaces l2tpv3 l2tpeth10 local-ip '172.18.201.10'
set interfaces l2tpv3 l2tpeth10 peer-session-id '10'
set interfaces l2tpv3 l2tpeth10 peer-tunnel-id '100'
set interfaces l2tpv3 l2tpeth10 remote-ip '172.18.204.10'
set interfaces l2tpv3 l2tpeth10 session-id '20'
set interfaces l2tpv3 l2tpeth10 source-port '6000'
set interfaces l2tpv3 l2tpeth10 tunnel-id '200'

R2:
---

set interfaces l2tpv3 l2tpeth10 address '2001:db8:beef::2/64'
set interfaces l2tpv3 l2tpeth10 address '100.0.0.2/24'
set interfaces l2tpv3 l2tpeth10 destination-port '6000'
set interfaces l2tpv3 l2tpeth10 encapsulation 'udp'
set interfaces l2tpv3 l2tpeth10 local-ip '172.18.204.10'
set interfaces l2tpv3 l2tpeth10 peer-session-id '20'
set interfaces l2tpv3 l2tpeth10 peer-tunnel-id '200'
set interfaces l2tpv3 l2tpeth10 remote-ip '172.18.201.10'
set interfaces l2tpv3 l2tpeth10 session-id '10'
set interfaces l2tpv3 l2tpeth10 source-port '3000'
set interfaces l2tpv3 l2tpeth10 tunnel-id '100'

1 files changed, 76 insertions, 0 deletions

diff --git a/python/vyos/ifconfig.py b/python/vyos/ifconfig.py
index 79e52eb38..1c5a7cd14 100644
--- a/python/vyos/ifconfig.py
+++ b/python/vyos/ifconfig.py
@@ -1704,3 +1704,79 @@ class GeneveIf(Interface):
             'remote': ''
         }
         return config
+
+class L2TPv3If(Interface):
+    """
+    The Linux bonding driver provides a method for aggregating multiple network
+    interfaces into a single logical "bonded" interface. The behavior of the
+    bonded interfaces depends upon the mode; generally speaking, modes provide
+    either hot standby or load balancing services. Additionally, link integrity
+    monitoring may be performed.
+    """
+    def __init__(self, ifname, config=''):
+        if config:
+            self._ifname = ifname
+            if not os.path.exists('/sys/class/net/{}'.format(self._ifname)):
+                # create tunnel interface
+                cmd = 'ip l2tp add tunnel tunnel_id {} '.format(config['tunnel_id'])
+                cmd += 'peer_tunnel_id {} '.format(config['peer_tunnel_id'])
+                cmd += 'udp_sport {} '.format(config['local_port'])
+                cmd += 'udp_dport {} '.format(config['remote_port'])
+                cmd += 'encap {} '.format(config['encapsulation'])
+                cmd += 'local {} '.format(config['local_address'])
+                cmd += 'remote {} '.format(config['remote_address'])
+                self._cmd(cmd)
+
+                # setup session
+                cmd = 'ip l2tp add session name {} '.format(self._ifname)
+                cmd += 'tunnel_id  {} '.format(config['tunnel_id'])
+                cmd += 'session_id {} '.format(config['session_id'])
+                cmd += 'peer_session_id  {} '.format(config['peer_session_id'])
+                self._cmd(cmd)
+
+                # interface is always A/D down. It needs to be enabled explicitly
+                self.set_state('down')
+
+        super().__init__(ifname, type='l2tp')
+
+    def remove(self):
+        """
+        Remove interface from operating system. Removing the interface
+        deconfigures all assigned IP addresses.
+        Example:
+        >>> from vyos.ifconfig import L2TPv3If
+        >>> i = L2TPv3If('l2tpeth0')
+        >>> i.remove()
+        """
+
+        if os.path.exists('/sys/class/net/{}'.format(self._ifname)):
+            # interface is always A/D down. It needs to be enabled explicitly
+            self.set_state('down')
+
+            #cmd = 'ip l2tp add tunnel tunnel_id {} '.format(config['tunnel_id'])
+
+        # call remove of parent class
+        super().remove()
+
+    @staticmethod
+    def get_config():
+        """
+        L2TPv3 interfaces require a configuration when they are added using
+        iproute2. This static method will provide the configuration dictionary
+        used by this class.
+
+        Example:
+        >> dict = L2TPv3If().get_config()
+        """
+        config = {
+            'peer_tunnel_id': '',
+            'local_port': 0,
+            'remote_port': 0,
+            'encapsulation': 'udp',
+            'local_address': '',
+            'remote_address': '',
+            'session_id': '',
+            'tunnel_id': '',
+            'peer_session_id': ''
+        }
+        return config