1 files changed, 117 insertions, 0 deletions
diff --git a/src/conf_mode/service_router-advert.py b/src/conf_mode/service_router-advert.py
new file mode 100755
index 000000000..4e1c432ab
--- /dev/null
+++ b/src/conf_mode/service_router-advert.py
@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2019 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/>.
+
+import os
+
+from sys import exit
+
+from vyos.config import Config
+from vyos.configdict import dict_merge
+from vyos.template import render
+from vyos.util import call
+from vyos.xml import defaults
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+config_file = r'/run/radvd/radvd.conf'
+
+def get_config():
+    conf = Config()
+    base = ['service', 'router-advert']
+    rtradv = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+
+    # We have gathered the dict representation of the CLI, but there are default
+    # options which we need to update into the dictionary retrived.
+    default_interface_values = defaults(base + ['interface'])
+    # we deal with prefix defaults later on
+    if 'prefix' in default_interface_values:
+        del default_interface_values['prefix']
+
+    default_prefix_values = defaults(base + ['interface', 'prefix'])
+
+    if 'interface' in rtradv:
+        for interface in rtradv['interface']:
+            rtradv['interface'][interface] = dict_merge(
+                default_interface_values, rtradv['interface'][interface])
+
+            if 'prefix' in rtradv['interface'][interface]:
+                for prefix in rtradv['interface'][interface]['prefix']:
+                    rtradv['interface'][interface]['prefix'][prefix] = dict_merge(
+                        default_prefix_values, rtradv['interface'][interface]['prefix'][prefix])
+
+            if 'name_server' in rtradv['interface'][interface]:
+                # always use a list when dealing with nameservers - eases the template generation
+                if isinstance(rtradv['interface'][interface]['name_server'], str):
+                    rtradv['interface'][interface]['name_server'] = [
+                        rtradv['interface'][interface]['name_server']]
+
+    return rtradv
+
+def verify(rtradv):
+    if not rtradv:
+        return None
+
+    if 'interface' not in rtradv:
+        return None
+
+    for interface in rtradv['interface']:
+        interface = rtradv['interface'][interface]
+        if 'prefix' in interface:
+            for prefix in interface['prefix']:
+                prefix = interface['prefix'][prefix]
+                valid_lifetime = prefix['valid_lifetime']
+                if valid_lifetime == 'infinity':
+                    valid_lifetime = 4294967295
+
+                preferred_lifetime = prefix['preferred_lifetime']
+                if preferred_lifetime == 'infinity':
+                    preferred_lifetime = 4294967295
+
+                if not (int(valid_lifetime) > int(preferred_lifetime)):
+                    raise ConfigError('Prefix valid-lifetime must be greater then preferred-lifetime')
+
+    return None
+
+def generate(rtradv):
+    if not rtradv:
+        return None
+
+    render(config_file, 'router-advert/radvd.conf.tmpl', rtradv, trim_blocks=True, permission=0o644)
+    return None
+
+def apply(rtradv):
+    if not rtradv:
+        # bail out early - looks like removal from running config
+        call('systemctl stop radvd.service')
+        if os.path.exists(config_file):
+            os.unlink(config_file)
+
+        return None
+
+    call('systemctl restart radvd.service')
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)