1 files changed, 128 insertions, 0 deletions
diff --git a/src/conf_mode/service_console-server.py b/src/conf_mode/service_console-server.py
new file mode 100644
index 0000000..b112add
--- /dev/null
+++ b/src/conf_mode/service_console-server.py
@@ -0,0 +1,128 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2021 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 psutil import process_iter
+
+from vyos.config import Config
+from vyos.template import render
+from vyos.utils.process import call
+from vyos import ConfigError
+
+config_file = '/run/conserver/conserver.cf'
+dropbear_systemd_file = '/run/systemd/system/dropbear@{port}.service.d/override.conf'
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['service', 'console-server']
+
+    # Retrieve CLI representation as dictionary
+    proxy = conf.get_config_dict(base, key_mangling=('-', '_'),
+                                 get_first_key=True)
+    # The retrieved dictionary will look something like this:
+    #
+    # {'device': {'usb0b2.4p1.0': {'speed': '9600'},
+    #             'usb0b2.4p1.1': {'data_bits': '8',
+    #                              'parity': 'none',
+    #                              'speed': '115200',
+    #                              'stop_bits': '2'}}}
+
+    # We have gathered the dict representation of the CLI, but there are default
+    # options which we need to update into the dictionary retrived.
+    proxy = conf.merge_defaults(proxy, recursive=True)
+
+    return proxy
+
+def verify(proxy):
+    if not proxy:
+        return None
+
+    aliases = []
+    processes = process_iter(['name', 'cmdline'])
+    if 'device' in proxy:
+        for device, device_config in proxy['device'].items():
+            for process in processes:
+                if 'agetty' in process.name() and device in process.cmdline():
+                    raise ConfigError(f'Port "{device}" already provides a '\
+                                      'console used by "system console"!')
+
+            if 'speed' not in device_config:
+                raise ConfigError(f'Port "{device}" requires speed to be set!')
+
+            if 'ssh' in device_config and 'port' not in device_config['ssh']:
+                raise ConfigError(f'Port "{device}" requires SSH port to be set!')
+
+            if 'alias' in device_config:
+                if device_config['alias'] in aliases:
+                    raise ConfigError("Console aliases must be unique")
+                else:
+                    aliases.append(device_config['alias'])
+
+    return None
+
+def generate(proxy):
+    if not proxy:
+        return None
+
+    render(config_file, 'conserver/conserver.conf.j2', proxy)
+    if 'device' in proxy:
+        for device, device_config in proxy['device'].items():
+            if 'ssh' not in device_config:
+                continue
+
+            tmp = {
+                'device' : device,
+                'port' : device_config['ssh']['port'],
+            }
+            render(dropbear_systemd_file.format(**tmp),
+                   'conserver/dropbear@.service.j2', tmp)
+
+    return None
+
+def apply(proxy):
+    call('systemctl daemon-reload')
+    call('systemctl stop dropbear@*.service conserver-server.service')
+
+    if not proxy:
+        if os.path.isfile(config_file):
+            os.unlink(config_file)
+        return None
+
+    call('systemctl restart conserver-server.service')
+
+    if 'device' in proxy:
+        for device, device_config in proxy['device'].items():
+            if 'ssh' not in device_config:
+                continue
+            port = device_config['ssh']['port']
+            call(f'systemctl restart dropbear@{port}.service')
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)