ids: T2659: Implement fastnetmon support

1 files changed, 89 insertions, 0 deletions

diff --git a/src/conf_mode/service_ids_fastnetmon.py b/src/conf_mode/service_ids_fastnetmon.py
new file mode 100755
index 000000000..71bef08ae
--- /dev/null
+++ b/src/conf_mode/service_ids_fastnetmon.py
@@ -0,0 +1,89 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2020 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 import ConfigError
+from vyos.util import call
+from vyos.template import render
+from vyos import airbag
+airbag.enable()
+
+config_file = r'/etc/fastnetmon.conf'
+networks_list = r'/etc/networks_list'
+
+def get_config():
+    conf = Config()
+    base = ['service', 'ids', 'ddos-protection']
+    fastnetmon = conf.get_config_dict(base, key_mangling=('-', '_'))
+    return fastnetmon
+
+def verify(fastnetmon):
+    if not fastnetmon:
+        return None
+
+    if not "mode" in fastnetmon:
+        raise ConfigError('ddos-protection mode is mandatory!')
+
+    if not "network" in fastnetmon:
+        raise ConfigError('Required define network!')
+
+    if not "listen_interface" in fastnetmon:
+        raise ConfigError('Define listen-interface is mandatory!')
+
+    if "alert_script" in fastnetmon:
+        if os.path.isfile(fastnetmon["alert_script"]):
+            # Check script permissions
+            if not os.access(fastnetmon["alert_script"], os.X_OK):
+                raise ConfigError('Script {0} does not have permissions for execution'.format(fastnetmon["alert_script"]))
+        else:
+           raise ConfigError('File {0} does not exists!'.format(fastnetmon["alert_script"])) 
+
+def generate(fastnetmon):
+    if not fastnetmon:
+        if os.path.isfile(config_file):
+            os.unlink(config_file)
+        if os.path.isfile(networks_list):
+            os.unlink(networks_list)
+
+        return
+
+    render(config_file, 'ids/fastnetmon.tmpl', fastnetmon, trim_blocks=True)
+    render(networks_list, 'ids/fastnetmon_networks_list.tmpl', fastnetmon, trim_blocks=True)
+
+    return None
+
+def apply(fastnetmon):
+    if not fastnetmon:
+        # Stop fastnetmon service if removed
+        call('systemctl stop fastnetmon.service')
+    else:
+        call('systemctl restart fastnetmon.service')
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)