snmp: T818: T1738: remove per user/trap engine id

As of the SNMP specification an SNMP engine ID should be unique per device.
To not make it more complicated for users - only use the global SNMP engine ID.

1 files changed, 51 insertions, 0 deletions

diff --git a/src/migration-scripts/snmp/0-to-1 b/src/migration-scripts/snmp/0-to-1
new file mode 100755
index 000000000..e52e6e04f
--- /dev/null
+++ b/src/migration-scripts/snmp/0-to-1
@@ -0,0 +1,51 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 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 sys
+from vyos.configtree import ConfigTree
+
+if (len(sys.argv) < 1):
+    print("Must specify file name!")
+    sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+config = ConfigTree(config_file)
+config_base = ['service', 'snmp', 'v3']
+
+if not config.exists(config_base):
+    # Nothing to do
+    sys.exit(0)
+else:
+    # we no longer support a per trap target engine ID (https://phabricator.vyos.net/T818)
+    if config.exists(config_base + ['v3', 'trap-target']):
+        for target in config.list_nodes(config_base + ['v3', 'trap-target']):
+            config.delete(config_base + ['v3', 'trap-target', target, 'engineid'])
+
+    # we no longer support a per user engine ID (https://phabricator.vyos.net/T818)
+    if config.exists(config_base + ['v3', 'user']):
+        for user in config.list_nodes(config_base + ['v3', 'user']):
+            config.delete(config_base + ['v3', 'user', user, 'engineid'])
+
+    try:
+        with open(file_name, 'w') as f:
+            f.write(config.to_string())
+    except OSError as e:
+        print("Failed to save the modified config: {}".format(e))
+        sys.exit(1)