From 03c9155cd012a56c9454b396c5db7785abb80b0a Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Sat, 18 Apr 2020 15:27:28 +0200
Subject: router-advert: rename XML/Python files for a common pattern

---
 src/conf_mode/service_router-advert.py | 169 +++++++++++++++++++++++++++++++++
 1 file changed, 169 insertions(+)
 create mode 100755 src/conf_mode/service_router-advert.py

(limited to 'src/conf_mode/service_router-advert.py')

diff --git a/src/conf_mode/service_router-advert.py b/src/conf_mode/service_router-advert.py
new file mode 100755
index 000000000..620f3eacf
--- /dev/null
+++ b/src/conf_mode/service_router-advert.py
@@ -0,0 +1,169 @@
+#!/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 stat import S_IRUSR, S_IWUSR, S_IRGRP
+from sys import exit
+
+from vyos.config import Config
+from vyos import ConfigError
+from vyos.util import call
+from vyos.template import render
+
+
+config_file = r'/etc/radvd.conf'
+
+default_config_data = {
+    'interfaces': []
+}
+
+def get_config():
+    rtradv = default_config_data
+    conf = Config()
+    base_level = ['service', 'router-advert']
+
+    if not conf.exists(base_level):
+        return rtradv
+
+    for interface in conf.list_nodes(base_level + ['interface']):
+        intf = {
+            'name': interface,
+            'hop_limit' : '64',
+            'default_lifetime': '',
+            'default_preference': 'medium',
+            'dnssl': [],
+            'link_mtu': '',
+            'managed_flag': 'off',
+            'interval_max': '600',
+            'interval_min': '',
+            'name_server': [],
+            'other_config_flag': 'off',
+            'prefixes' : [],
+            'reachable_time': '0',
+            'retrans_timer': '0',
+            'send_advert': 'on'
+        }
+
+        # set config level first to reduce boilerplate code
+        conf.set_level(base_level + ['interface', interface])
+
+        if conf.exists(['hop-limit']):
+            intf['hop_limit'] = conf.return_value(['hop-limit'])
+
+        if conf.exists(['default-lifetim']):
+            intf['default_lifetime'] = conf.return_value(['default-lifetim'])
+
+        if conf.exists(['default-preference']):
+            intf['default_preference'] = conf.return_value(['default-preference'])
+
+        if conf.exists(['dnssl']):
+            intf['dnssl'] = conf.return_values(['dnssl'])
+
+        if conf.exists(['link-mtu']):
+            intf['link_mtu'] = conf.return_value(['link-mtu'])
+
+        if conf.exists(['managed-flag']):
+            intf['managed_flag'] = 'on'
+
+        if conf.exists(['interval', 'max']):
+            intf['interval_max'] = conf.return_value(['interval', 'max'])
+
+        if conf.exists(['interval', 'min']):
+            intf['interval_min'] = conf.return_value(['interval', 'min'])
+
+        if conf.exists(['name-server']):
+            intf['name_server'] = conf.return_values(['name-server'])
+
+        if conf.exists(['other-config-flag']):
+            intf['other_config_flag'] = 'on'
+
+        if conf.exists(['reachable-time']):
+            intf['reachable_time'] = conf.return_value(['reachable-time'])
+
+        if conf.exists(['retrans-timer']):
+            intf['retrans_timer'] = conf.return_value(['retrans-timer'])
+
+        if conf.exists(['no-send-advert']):
+            intf['send_advert'] = 'off'
+
+        for prefix in conf.list_nodes(['prefix']):
+            tmp = {
+                'prefix' : prefix,
+                'autonomous_flag' : 'on',
+                'on_link' : 'on',
+                'preferred_lifetime': '14400',
+                'valid_lifetime' : '2592000'
+
+            }
+
+            # set config level first to reduce boilerplate code
+            conf.set_level(base_level + ['interface', interface, 'prefix', prefix])
+
+            if conf.exists(['no-autonomous-flag']):
+                tmp['autonomous_flag'] = 'off'
+
+            if conf.exists(['no-on-link-flag']):
+                tmp['on_link'] = 'off'
+
+            if conf.exists(['preferred-lifetime']):
+                tmp['preferred_lifetime'] = conf.return_value(['preferred-lifetime'])
+
+            if conf.exists(['valid-lifetime']):
+                tmp['valid_lifetime'] = conf.return_value(['valid-lifetime'])
+
+            intf['prefixes'].append(tmp)
+
+        rtradv['interfaces'].append(intf)
+
+    return rtradv
+
+def verify(rtradv):
+    return None
+
+def generate(rtradv):
+    if not rtradv['interfaces']:
+        return None
+
+    render(config_file, 'router-advert/radvd.conf.tmpl', rtradv, trim_blocks=True)
+
+    # adjust file permissions of new configuration file
+    if os.path.exists(config_file):
+        os.chmod(config_file, S_IRUSR | S_IWUSR | S_IRGRP)
+
+    return None
+
+def apply(rtradv):
+    if not rtradv['interfaces']:
+        # 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)
-- 
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