T5474: establish common file name pattern for XML conf mode commands

We will use _ as CLI level divider. The XML definition filename and also
the Python helper should match the CLI node.

Example:
set interfaces ethernet -> interfaces_ethernet.xml.in
set interfaces bond -> interfaces_bond.xml.in
set service dhcp-server -> service_dhcp-server-xml.in

1 files changed, 102 insertions, 0 deletions

diff --git a/src/conf_mode/interfaces_geneve.py b/src/conf_mode/interfaces_geneve.py
new file mode 100755
index 000000000..f6694ddde
--- /dev/null
+++ b/src/conf_mode/interfaces_geneve.py
@@ -0,0 +1,102 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019-2022 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/>.
+
+from sys import exit
+from netifaces import interfaces
+
+from vyos.config import Config
+from vyos.configdict import get_interface_dict
+from vyos.configdict import is_node_changed
+from vyos.configverify import verify_address
+from vyos.configverify import verify_mtu_ipv6
+from vyos.configverify import verify_bridge_delete
+from vyos.configverify import verify_mirror_redirect
+from vyos.configverify import verify_bond_bridge_member
+from vyos.ifconfig import GeneveIf
+from vyos import ConfigError
+
+from vyos import airbag
+airbag.enable()
+
+def get_config(config=None):
+    """
+    Retrive CLI config as dictionary. Dictionary can never be empty, as at least the
+    interface name will be added or a deleted flag
+    """
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['interfaces', 'geneve']
+    ifname, geneve = get_interface_dict(conf, base)
+
+    # GENEVE interfaces are picky and require recreation if certain parameters
+    # change. But a GENEVE interface should - of course - not be re-created if
+    # it's description or IP address is adjusted. Feels somehow logic doesn't it?
+    for cli_option in ['remote', 'vni', 'parameters']:
+        if is_node_changed(conf, base + [ifname, cli_option]):
+            geneve.update({'rebuild_required': {}})
+
+    return geneve
+
+def verify(geneve):
+    if 'deleted' in geneve:
+        verify_bridge_delete(geneve)
+        return None
+
+    verify_mtu_ipv6(geneve)
+    verify_address(geneve)
+    verify_bond_bridge_member(geneve)
+    verify_mirror_redirect(geneve)
+
+    if 'remote' not in geneve:
+        raise ConfigError('Remote side must be configured')
+
+    if 'vni' not in geneve:
+        raise ConfigError('VNI must be configured')
+
+    return None
+
+
+def generate(geneve):
+    return None
+
+def apply(geneve):
+    # Check if GENEVE interface already exists
+    if 'rebuild_required' in geneve or 'delete' in geneve:
+        if geneve['ifname'] in interfaces():
+            g = GeneveIf(geneve['ifname'])
+            # GENEVE is super picky and the tunnel always needs to be recreated,
+            # thus we can simply always delete it first.
+            g.remove()
+
+    if 'deleted' not in geneve:
+        # Finally create the new interface
+        g = GeneveIf(**geneve)
+        g.update(geneve)
+
+    return None
+
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)