Initial commit

8 files changed, 707 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..cdaae18
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+__pycache__
+
+/src/mmfwd.yaml
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..1a65bdf
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,15 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Python Debugger: Module",
+			"type": "debugpy",
+			"request": "launch",
+			"module": "mmfwd",
+			"cwd": "${workspaceFolder}/src",
+		}
+	]
+}
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..d159169
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
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+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
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+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
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+Activities other than copying, distribution and modification are not
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+
+You may charge a fee for the physical act of transferring a copy, and
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+This section is intended to make thoroughly clear what is believed to
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+  8. If the distribution and/or use of the Program is restricted in
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+Software Foundation.  If the Program does not specify a version number of
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+  10. If you wish to incorporate parts of the Program into other free
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+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
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+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 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 General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6b33a3e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,12 @@
+# MMFWD
+Forward calls and texts using ModemManager framework.
+
+This is a daemon that forwards calls and text messages via email and
+SIP(planned?). I made this python program to receive KYC messages whilst I'm
+overseas. South Korea is a weird county where all KYC verifications are done via
+personal mobile number. Without a mobile number, doing anything online is almost
+impossible. The daemon can be run on a small and reliable device that is kept
+somewhere safe.
+
+- https://pygobject.gnome.org/getting_started.html
+- https://code.nap.av.it.pt/mobility-networks/modemmanager/-/tree/1.18.12/examples/modem-watcher-python
diff --git a/doc/mmfwd.sample.yaml b/doc/mmfwd.sample.yaml
new file mode 100644
index 0000000..7079708
--- /dev/null
+++ b/doc/mmfwd.sample.yaml
@@ -0,0 +1,11 @@
+mmfwd:
+  instances:
+    - mid: # modem identity
+        n-own: '.*' # own number, regex. Use all modems
+      fwd:
+        mailto:
+          - jd@example.com
+        cmd:
+          - /usr/bin/mailx
+          - jd@example.com
+          - -s Text from {sender}
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..91073b0
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,24 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "mmfwd"
+version = "0.0.0"
+authors = [
+  { name="David Timber", email="dxdt@dev.snart.me" },
+]
+description = "Forward calls and texts using ModemManager framework"
+readme = "README.md"
+requires-python = ">= 3.11" # TODO
+dependencies = [ "pyjson5", "PyYAML", "PyGObject" ]
+
+classifiers = [
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: Apache Software License",
+    "Operating System :: OS Independent",
+]
+
+[project.urls]
+Homepage = "https://github.com/dxdxdt/mmfwd/"
+Issues = "https://github.com/dxdxdt/mmfwd/issues"
diff --git a/src/mmfwd/__init__.py b/src/mmfwd/__init__.py
new file mode 100644
index 0000000..0228ac6
--- /dev/null
+++ b/src/mmfwd/__init__.py
@@ -0,0 +1,273 @@
+from copy import copy
+import os
+import re
+import subprocess
+import sys
+import threading
+from typing import Any
+import gi
+import yaml
+gi.require_version('ModemManager', '1.0')
+from gi.repository import Gio, ModemManager
+
+try:
+    from yaml import CLoader as Loader, CDumper as Dumper
+except ImportError:
+    from yaml import Loader, Dumper
+
+APP_ID = "me.snart.mmfwd"
+
+class ModemIdentity:
+	def __init__ (self, conf: dict[str, Any]):
+		self.n_own: str = None
+
+		if conf:
+			self.n_own: str = conf.get("n-own")
+
+class Forward:
+	def __init__ (self, conf: dict[str, Any]):
+		self.mailto: list[str] = conf.get("mailto", [])
+		self.cmd: list[str] = conf.get("cmd", [])
+
+	def post (self, doc):
+		cmd = list[str]()
+		for arg in self.cmd:
+			cmd.append(arg.format(
+				sender = doc["sms"]["from"],
+				to = doc["sms"]["to"],
+				ts_req = doc["sms"]["ts-req"],
+				ts_del = doc["sms"]["ts-del"],
+			))
+
+		with subprocess.Popen(cmd, stdin = subprocess.PIPE) as p:
+			p.stdin.write(("--" + os.linesep).encode())
+			yaml.dump(doc, p.stdin, encoding = 'utf-8', allow_unicode = True)
+			p.stdin.close()
+
+class Instance:
+	def __init__ (self, conf: dict[str, Any]):
+		self.mobj: str = None
+		self.mid = ModemIdentity(conf.get("mid"))
+		self.fwd = Forward(conf.get("fwd"))
+
+	def match (self, m) -> bool:
+		if self.mid.n_own:
+			for n in m.get_property('own-numbers'):
+				if re.match(self.mid.n_own, n):
+					return True
+		else:
+			return True
+
+		return False
+
+class CallbackUserData:
+	def __init__ (self):
+		self.instance = None
+		self.modem = None
+		self.messaging = None
+		self.voice = None
+		self.call = None
+		self.own_numbers = None
+
+class Application:
+	def __init__(self, conf: dict[str, Any]):
+		self.instances = list[Instance]()
+		for i in conf["instances"]:
+			self.instances.append(Instance(i))
+
+		# Flag for initial logs
+		self.initializing = True
+		# Setup DBus monitoring
+		self.connection = Gio.bus_get_sync(Gio.BusType.SYSTEM, None)
+		self.manager = ModemManager.Manager.new_sync(
+			self.connection,
+			Gio.DBusObjectManagerClientFlags.DO_NOT_AUTO_START,
+			None)
+		# IDs for added/removed signals
+		self.object_added_id = 0
+		self.object_removed_id = 0
+		# Follow availability of the ModemManager process
+		self.available = False
+		self.manager.connect('notify::name-owner', self.on_name_owner)
+		self.on_name_owner(self.manager, None)
+		# Finish initialization
+		self.initializing = False
+
+	def attach_to (self, obj, instance):
+		modem = obj.get_modem()
+		messaging = obj.get_modem_messaging()
+		voice = obj.get_modem_voice()
+
+		ud = CallbackUserData()
+		ud.instance = instance
+		ud.modem = modem
+		ud.messaging = messaging
+		ud.voice = voice
+		ud.own_numbers = modem.get_property('own-numbers')
+
+		modem.connect('state-changed', self.on_modem_state_updated, ud)
+		messaging.connect('added', self.on_message_added, ud)
+		voice.connect('call-added', self.on_call_added, ud)
+
+		# fire request to sync
+		messaging.list(None, self.on_messages, ud)
+		voice.list_calls(None, self.on_calls, ud)
+
+	def set_available(self):
+		"""
+		ModemManager is now available.
+		"""
+		if not self.available or self.initializing:
+			print('[ModemWatcher] ModemManager %s service is available in bus' % self.manager.get_version())
+		self.object_added_id = self.manager.connect('object-added', self.on_object_added)
+		self.object_removed_id = self.manager.connect('object-removed', self.on_object_removed)
+		self.available = True
+		# Initial scan
+		if self.initializing:
+			for obj in self.manager.get_objects():
+				self.on_object_added(self.manager, obj)
+
+	def set_unavailable(self):
+		"""
+		ModemManager is now unavailable.
+		"""
+		if self.available or self.initializing:
+			print('[ModemWatcher] ModemManager service not available in bus')
+		if self.object_added_id:
+			self.manager.disconnect(self.object_added_id)
+			self.object_added_id = 0
+		if self.object_removed_id:
+			self.manager.disconnect(self.object_removed_id)
+			self.object_removed_id = 0
+		self.available = False
+
+	def on_name_owner(self, manager, prop):
+		"""
+		Name owner updates.
+		"""
+		if self.manager.get_name_owner():
+			self.set_available()
+		else:
+			self.set_unavailable()
+
+	def on_modem_state_updated(self, modem, old, new, reason, ud):
+		"""
+		Modem state updated
+		"""
+		print('[ModemWatcher] %s: modem state updated: %s -> %s (%s) ' %
+				(modem.get_object_path(),
+				ModemManager.ModemState.get_string (old),
+				ModemManager.ModemState.get_string (new),
+				ModemManager.ModemStateChangeReason.get_string (reason)))
+
+	def on_object_added(self, manager, obj):
+		"""
+		Object added.
+		"""
+		modem = obj.get_modem()
+		print('[ModemWatcher] %s: modem managed by ModemManager [%s]: %s (%s)' %
+				(obj.get_object_path(),
+				modem.get_equipment_identifier(),
+				modem.get_manufacturer(),
+				modem.get_model()))
+
+		for i in self.instances:
+			if not i.match(modem):
+				continue
+
+			mstate = modem.get_state()
+			if mstate == ModemManager.ModemState.FAILED:
+				sys.stderr.write(
+					"[mmfwd] matching modem in failed state!" + os.linesep)
+				# TODO: warn
+				continue
+
+			if mstate == ModemManager.ModemState.DISABLED:
+				print('''[mmfwd] {m}: enabling disabled target modem'''.format(
+					m = obj.get_object_path()))
+				modem.enable()
+
+			print('''[mmfwd] {m}: attaching to target modem'''.format(
+				m = obj.get_object_path()))
+			self.attach_to(obj, i)
+
+	def on_object_removed(self, manager, obj):
+		"""
+		Object removed.
+		"""
+		path = obj.get_object_path()
+
+		print('[ModemWatcher] %s: modem unmanaged by ModemManager' % path)
+
+	def on_message_added (self, messaging, path, received, ud):
+		messaging.list(None, self.on_messages, ud)
+		print('''[mmfwd] on_message_added: {a} {b} {c}'''.format(
+			a = messaging,
+			b = path,
+			c = received,
+		))
+
+	def on_messages (self, messaging, task, ud):
+		for m in messaging.list_finish(task):
+			if m.get_state() != ModemManager.SmsState.RECEIVED:
+				continue
+
+			path = m.get_path()
+			doc = {
+				"sms": {
+					"from": m.get_number(),
+					"to": ud.own_numbers,
+					"text": m.get_text(),
+					"data": m.get_data(),
+					"ts-req": m.get_timestamp(),
+					"ts-del": m.get_discharge_timestamp(),
+				},
+			}
+
+			print("--")
+			yaml.dump(doc, sys.stdout, allow_unicode = True)
+			ud.instance.fwd.post(doc)
+
+			messaging.delete(path, None, self.on_message_delete)
+
+	def on_message_delete (self, messaging, task):
+		messaging.delete_finish(task)
+
+	def on_call_added (self, voice, path, ud):
+		voice.list_calls(None, self.on_calls, ud)
+
+	def on_calls (self, voice, task, ud = None):
+		for c in voice.list_calls_finish(task):
+			state = c.get_state()
+			path = c.get_path()
+			nud = copy(ud)
+			nud.call = c
+
+			if state == ModemManager.CallState.ACTIVE:
+				c.hangup(None, self.on_call_hangup, nud)
+			elif state == ModemManager.CallState.RINGING_IN:
+				if True:
+					# FIXME
+					# just hang up for now
+					c.hangup(None, self.on_call_hangup, nud)
+				else:
+					c.accept(None, self.on_call_accept, nud)
+			elif state == ModemManager.CallState.TERMINATED:
+				voice.delete_call(path, None, self.on_call_delete, nud)
+
+	def on_call_change (self, call, old, new, reason, ud):
+		ud.voice.list_calls(None, self.on_calls, ud)
+
+	def on_call_hangup (self, call, task, ud):
+		call.hangup_finish(task)
+		ud.voice.list_calls(None, self.on_calls, ud)
+
+	def on_call_delete (self, voice, task, ud):
+		voice.delete_call_finish(task)
+
+	def on_call_accept (self, call, task, ud):
+		call.accept_finish(task)
+		call.connect('state-changed', self.on_call_change, ud)
+
+		# The custom ModemManager will send AT+CPCMREG.
+		# TODO: play the voice message
diff --git a/src/mmfwd/__main__.py b/src/mmfwd/__main__.py
new file mode 100644
index 0000000..427e512
--- /dev/null
+++ b/src/mmfwd/__main__.py
@@ -0,0 +1,30 @@
+import signal
+import yaml
+from gi.repository import GLib
+from mmfwd import *
+
+CONFIG_FILENAME = "mmfwd.yaml"
+
+def handle_signal (loop):
+	'''Handle exit signals'''
+	loop.quit()
+
+# load config
+try:
+    from yaml import CLoader as Loader, CDumper as Dumper
+except ImportError:
+    from yaml import Loader, Dumper
+
+conf = yaml.load(open(CONFIG_FILENAME), Loader)["mmfwd"]
+# instantiate the singleton objects
+app = Application(conf)
+main_loop = GLib.MainLoop()
+
+GLib.unix_signal_add(
+	GLib.PRIORITY_HIGH, signal.SIGINT, handle_signal, main_loop)
+GLib.unix_signal_add(
+	GLib.PRIORITY_HIGH, signal.SIGTERM, handle_signal, main_loop)
+
+
+# do the Glib loop
+main_loop.run()