--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/plugins/plugin_dbg_manhole.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,69 @@
+#!/usr/bin/env python3
+
+
+# SAT plugin for debugging, using a manhole
+# Copyright (C) 2009-2021 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from libervia.backend.core.i18n import _
+from libervia.backend.core.constants import Const as C
+from libervia.backend.core.log import getLogger
+from twisted.conch.insults import insults
+from twisted.conch.telnet import TelnetTransport, TelnetBootstrapProtocol
+from twisted.internet import reactor, protocol, defer
+from twisted.words.protocols.jabber import jid
+from twisted.conch.manhole import ColoredManhole
+
+log = getLogger(__name__)
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Manhole debug plugin",
+    C.PI_IMPORT_NAME: "manhole",
+    C.PI_TYPE: "DEBUG",
+    C.PI_PROTOCOLS: [],
+    C.PI_DEPENDENCIES: [],
+    C.PI_MAIN: "Manhole",
+    C.PI_HANDLER: "no",
+    C.PI_DESCRIPTION: _("""Debug plugin to have a telnet server"""),
+}
+
+
+
+class Manhole(object):
+
+    def __init__(self, host):
+        self.host = host
+        port = int(host.memory.config_get(None, "manhole_debug_dangerous_port_int", 0))
+        if port:
+            self.start_manhole(port)
+
+    def start_manhole(self, port):
+        log.warning(_("/!\\ Manhole debug server activated, be sure to not use it in "
+                      "production, this is dangerous /!\\"))
+        log.info(_("You can connect to manhole server using telnet on port {port}")
+            .format(port=port))
+        f = protocol.ServerFactory()
+        namespace = {
+            "host": self.host,
+            "C": C,
+            "jid": jid,
+            "d": defer.ensureDeferred,
+        }
+        f.protocol = lambda: TelnetTransport(TelnetBootstrapProtocol,
+                                             insults.ServerProtocol,
+                                             ColoredManhole,
+                                             namespace=namespace,
+                                             )
+        reactor.listenTCP(port, f)