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Diffstat (limited to 'sleekxmpp/plugins/xep_0325/control.py')
| -rw-r--r-- | sleekxmpp/plugins/xep_0325/control.py | 574 |
1 files changed, 0 insertions, 574 deletions
diff --git a/sleekxmpp/plugins/xep_0325/control.py b/sleekxmpp/plugins/xep_0325/control.py deleted file mode 100644 index e34eb2c2..00000000 --- a/sleekxmpp/plugins/xep_0325/control.py +++ /dev/null @@ -1,574 +0,0 @@ -""" - SleekXMPP: The Sleek XMPP Library - Implementation of xeps for Internet of Things - http://wiki.xmpp.org/web/Tech_pages/IoT_systems - Copyright (C) 2013 Sustainable Innovation, Joachim.lindborg@sust.se, bjorn.westrom@consoden.se - This file is part of SleekXMPP. - - See the file LICENSE for copying permission. -""" - -import logging -import time -from threading import Thread, Timer, Lock - -from sleekxmpp.xmlstream import JID -from sleekxmpp.xmlstream.handler import Callback -from sleekxmpp.xmlstream.matcher import StanzaPath -from sleekxmpp.plugins.base import BasePlugin -from sleekxmpp.plugins.xep_0325 import stanza -from sleekxmpp.plugins.xep_0325.stanza import Control - - -log = logging.getLogger(__name__) - - -class XEP_0325(BasePlugin): - - """ - XEP-0325: IoT Control - - - Actuators are devices in sensor networks that can be controlled through - the network and act with the outside world. In sensor networks and - Internet of Things applications, actuators make it possible to automate - real-world processes. - This plugin implements a mechanism whereby actuators can be controlled - in XMPP-based sensor networks, making it possible to integrate sensors - and actuators of different brands, makes and models into larger - Internet of Things applications. - - Also see <http://xmpp.org/extensions/xep-0325.html> - - Configuration Values: - threaded -- Indicates if communication with sensors should be threaded. - Defaults to True. - - Events: - Sensor side - ----------- - Control Event:DirectSet -- Received a control message - Control Event:SetReq -- Received a control request - - Client side - ----------- - Control Event:SetResponse -- Received a response to a - control request, type result - Control Event:SetResponseError -- Received a response to a - control request, type error - - Attributes: - threaded -- Indicates if command events should be threaded. - Defaults to True. - sessions -- A dictionary or equivalent backend mapping - session IDs to dictionaries containing data - relevant to a request's session. This dictionary is used - both by the client and sensor side. On client side, seqnr - is used as key, while on sensor side, a session_id is used - as key. This ensures that the two will not collide, so - one instance can be both client and sensor. - Sensor side - ----------- - nodes -- A dictionary mapping sensor nodes that are serviced through - this XMPP instance to their device handlers ("drivers"). - Client side - ----------- - last_seqnr -- The last used sequence number (integer). One sequence of - communication (e.g. -->request, <--accept, <--fields) - between client and sensor is identified by a unique - sequence number (unique between the client/sensor pair) - - Methods: - plugin_init -- Overrides base_plugin.plugin_init - post_init -- Overrides base_plugin.post_init - plugin_end -- Overrides base_plugin.plugin_end - - Sensor side - ----------- - register_node -- Register a sensor as available from this XMPP - instance. - - Client side - ----------- - set_request -- Initiates a control request to modify data in - sensor(s). Non-blocking, a callback function will - be called when the sensor has responded. - set_command -- Initiates a control command to modify data in - sensor(s). Non-blocking. The sensor(s) will not - respond regardless of the result of the command, - so no callback is made. - - """ - - name = 'xep_0325' - description = 'XEP-0325 Internet of Things - Control' - dependencies = set(['xep_0030']) - stanza = stanza - - - default_config = { - 'threaded': True -# 'session_db': None - } - - def plugin_init(self): - """ Start the XEP-0325 plugin """ - - self.xmpp.register_handler( - Callback('Control Event:DirectSet', - StanzaPath('message/set'), - self._handle_direct_set)) - - self.xmpp.register_handler( - Callback('Control Event:SetReq', - StanzaPath('iq@type=set/set'), - self._handle_set_req)) - - self.xmpp.register_handler( - Callback('Control Event:SetResponse', - StanzaPath('iq@type=result/setResponse'), - self._handle_set_response)) - - self.xmpp.register_handler( - Callback('Control Event:SetResponseError', - StanzaPath('iq@type=error/setResponse'), - self._handle_set_response)) - - # Server side dicts - self.nodes = {}; - self.sessions = {}; - - self.last_seqnr = 0; - self.seqnr_lock = Lock(); - - ## For testning only - self.test_authenticated_from = "" - - def post_init(self): - """ Init complete. Register our features in Serivce discovery. """ - BasePlugin.post_init(self) - self.xmpp['xep_0030'].add_feature(Control.namespace) - self.xmpp['xep_0030'].set_items(node=Control.namespace, items=tuple()) - - def _new_session(self): - """ Return a new session ID. """ - return str(time.time()) + '-' + self.xmpp.new_id() - - def plugin_end(self): - """ Stop the XEP-0325 plugin """ - self.sessions.clear(); - self.xmpp.remove_handler('Control Event:DirectSet') - self.xmpp.remove_handler('Control Event:SetReq') - self.xmpp.remove_handler('Control Event:SetResponse') - self.xmpp.remove_handler('Control Event:SetResponseError') - self.xmpp['xep_0030'].del_feature(feature=Control.namespace) - self.xmpp['xep_0030'].set_items(node=Control.namespace, items=tuple()); - - - # ================================================================= - # Sensor side (data provider) API - - def register_node(self, nodeId, device, commTimeout, sourceId=None, cacheType=None): - """ - Register a sensor/device as available for control requests/commands - through this XMPP instance. - - The device object may by any custom implementation to support - specific devices, but it must implement the functions: - has_control_field - set_control_fields - according to the interfaces shown in the example device.py file. - - Arguments: - nodeId -- The identifier for the device - device -- The device object - commTimeout -- Time in seconds to wait between each callback from device during - a data readout. Float. - sourceId -- [optional] identifying the data source controlling the device - cacheType -- [optional] narrowing down the search to a specific kind of node - """ - self.nodes[nodeId] = {"device": device, - "commTimeout": commTimeout, - "sourceId": sourceId, - "cacheType": cacheType}; - - def _set_authenticated(self, auth=''): - """ Internal testing function """ - self.test_authenticated_from = auth; - - def _get_new_seqnr(self): - """ Returns a unique sequence number (unique across threads) """ - self.seqnr_lock.acquire(); - self.last_seqnr = self.last_seqnr + 1; - self.seqnr_lock.release(); - return str(self.last_seqnr); - - def _handle_set_req(self, iq): - """ - Event handler for reception of an Iq with set req - this is a - control request. - - Verifies that - - all the requested nodes are available - (if no nodes are specified in the request, assume all nodes) - - all the control fields are available from all requested nodes - (if no nodes are specified in the request, assume all nodes) - - If the request passes verification, the control request is passed - to the devices (in a separate thread). - If the verification fails, a setResponse with error indication - is sent. - """ - - error_msg = ''; - req_ok = True; - missing_node = None; - missing_field = None; - - # Authentication - if len(self.test_authenticated_from) > 0 and not iq['from'] == self.test_authenticated_from: - # Invalid authentication - req_ok = False; - error_msg = "Access denied"; - - # Nodes - process_nodes = []; - if len(iq['set']['nodes']) > 0: - for n in iq['set']['nodes']: - if not n['nodeId'] in self.nodes: - req_ok = False; - missing_node = n['nodeId']; - error_msg = "Invalid nodeId " + n['nodeId']; - process_nodes = [n['nodeId'] for n in iq['set']['nodes']]; - else: - process_nodes = self.nodes.keys(); - - # Fields - for control we need to find all in all devices, otherwise we reject - process_fields = []; - if len(iq['set']['datas']) > 0: - for f in iq['set']['datas']: - for node in self.nodes: - if not self.nodes[node]["device"].has_control_field(f['name'], f._get_typename()): - req_ok = False; - missing_field = f['name']; - error_msg = "Invalid field " + f['name']; - break; - process_fields = [(f['name'], f._get_typename(), f['value']) for f in iq['set']['datas']]; - - if req_ok: - session = self._new_session(); - self.sessions[session] = {"from": iq['from'], "to": iq['to'], "seqnr": iq['id']}; - self.sessions[session]["commTimers"] = {}; - self.sessions[session]["nodeDone"] = {}; - # Flag that a reply is exected when we are done - self.sessions[session]["reply"] = True; - - self.sessions[session]["node_list"] = process_nodes; - if self.threaded: - #print("starting thread") - tr_req = Thread(target=self._threaded_node_request, args=(session, process_fields)) - tr_req.start() - #print("started thread") - else: - self._threaded_node_request(session, process_fields); - - else: - iq.reply(); - iq['type'] = 'error'; - iq['setResponse']['responseCode'] = "NotFound"; - if missing_node is not None: - iq['setResponse'].add_node(missing_node); - if missing_field is not None: - iq['setResponse'].add_data(missing_field); - iq['setResponse']['error']['var'] = "Output"; - iq['setResponse']['error']['text'] = error_msg; - iq.send(block=False); - - def _handle_direct_set(self, msg): - """ - Event handler for reception of a Message with set command - this is a - direct control command. - - Verifies that - - all the requested nodes are available - (if no nodes are specified in the request, assume all nodes) - - all the control fields are available from all requested nodes - (if no nodes are specified in the request, assume all nodes) - - If the request passes verification, the control request is passed - to the devices (in a separate thread). - If the verification fails, do nothing. - """ - req_ok = True; - - # Nodes - process_nodes = []; - if len(msg['set']['nodes']) > 0: - for n in msg['set']['nodes']: - if not n['nodeId'] in self.nodes: - req_ok = False; - error_msg = "Invalid nodeId " + n['nodeId']; - process_nodes = [n['nodeId'] for n in msg['set']['nodes']]; - else: - process_nodes = self.nodes.keys(); - - # Fields - for control we need to find all in all devices, otherwise we reject - process_fields = []; - if len(msg['set']['datas']) > 0: - for f in msg['set']['datas']: - for node in self.nodes: - if not self.nodes[node]["device"].has_control_field(f['name'], f._get_typename()): - req_ok = False; - missing_field = f['name']; - error_msg = "Invalid field " + f['name']; - break; - process_fields = [(f['name'], f._get_typename(), f['value']) for f in msg['set']['datas']]; - - if req_ok: - session = self._new_session(); - self.sessions[session] = {"from": msg['from'], "to": msg['to']}; - self.sessions[session]["commTimers"] = {}; - self.sessions[session]["nodeDone"] = {}; - self.sessions[session]["reply"] = False; - - self.sessions[session]["node_list"] = process_nodes; - if self.threaded: - #print("starting thread") - tr_req = Thread(target=self._threaded_node_request, args=(session, process_fields)) - tr_req.start() - #print("started thread") - else: - self._threaded_node_request(session, process_fields); - - - def _threaded_node_request(self, session, process_fields): - """ - Helper function to handle the device control in a separate thread. - - Arguments: - session -- The request session id - process_fields -- The fields to set in the devices. List of tuple format: - (name, datatype, value) - """ - for node in self.sessions[session]["node_list"]: - self.sessions[session]["nodeDone"][node] = False; - - for node in self.sessions[session]["node_list"]: - timer = Timer(self.nodes[node]['commTimeout'], self._event_comm_timeout, args=(session, node)); - self.sessions[session]["commTimers"][node] = timer; - timer.start(); - self.nodes[node]['device'].set_control_fields(process_fields, session=session, callback=self._device_set_command_callback); - - def _event_comm_timeout(self, session, nodeId): - """ - Triggered if any of the control operations timeout. - Stop communicating with the failing device. - If the control command was an Iq request, sends a failure - message back to the client. - - Arguments: - session -- The request session id - nodeId -- The id of the device which timed out - """ - - if self.sessions[session]["reply"]: - # Reply is exected when we are done - iq = self.xmpp.Iq(); - iq['from'] = self.sessions[session]['to']; - iq['to'] = self.sessions[session]['from']; - iq['type'] = "error"; - iq['id'] = self.sessions[session]['seqnr']; - iq['setResponse']['responseCode'] = "OtherError"; - iq['setResponse'].add_node(nodeId); - iq['setResponse']['error']['var'] = "Output"; - iq['setResponse']['error']['text'] = "Timeout."; - iq.send(block=False); - - ## TODO - should we send one timeout per node?? - - # Drop communication with this device and check if we are done - self.sessions[session]["nodeDone"][nodeId] = True; - if (self._all_nodes_done(session)): - # The session is complete, delete it - del self.sessions[session]; - - def _all_nodes_done(self, session): - """ - Checks wheter all devices are done replying to the control command. - - Arguments: - session -- The request session id - """ - for n in self.sessions[session]["nodeDone"]: - if not self.sessions[session]["nodeDone"][n]: - return False; - return True; - - def _device_set_command_callback(self, session, nodeId, result, error_field=None, error_msg=None): - """ - Callback function called by the devices when the control command is - complete or failed. - If needed, composes a message with the result and sends it back to the - client. - - Arguments: - session -- The request session id - nodeId -- The device id which initiated the callback - result -- The current result status of the control command. Valid values are: - "error" - Set fields failed. - "ok" - All fields were set. - error_field -- [optional] Only applies when result == "error" - The field name that failed (usually means it is missing) - error_msg -- [optional] Only applies when result == "error". - Error details when a request failed. - """ - - if not session in self.sessions: - # This can happend if a session was deleted, like in a timeout. Just drop the data. - return - - if result == "error": - self.sessions[session]["commTimers"][nodeId].cancel(); - - if self.sessions[session]["reply"]: - # Reply is exected when we are done - iq = self.xmpp.Iq(); - iq['from'] = self.sessions[session]['to']; - iq['to'] = self.sessions[session]['from']; - iq['type'] = "error"; - iq['id'] = self.sessions[session]['seqnr']; - iq['setResponse']['responseCode'] = "OtherError"; - iq['setResponse'].add_node(nodeId); - if error_field is not None: - iq['setResponse'].add_data(error_field); - iq['setResponse']['error']['var'] = error_field; - iq['setResponse']['error']['text'] = error_msg; - iq.send(block=False); - - # Drop communication with this device and check if we are done - self.sessions[session]["nodeDone"][nodeId] = True; - if (self._all_nodes_done(session)): - # The session is complete, delete it - del self.sessions[session]; - else: - self.sessions[session]["commTimers"][nodeId].cancel(); - - self.sessions[session]["nodeDone"][nodeId] = True; - if (self._all_nodes_done(session)): - if self.sessions[session]["reply"]: - # Reply is exected when we are done - iq = self.xmpp.Iq(); - iq['from'] = self.sessions[session]['to']; - iq['to'] = self.sessions[session]['from']; - iq['type'] = "result"; - iq['id'] = self.sessions[session]['seqnr']; - iq['setResponse']['responseCode'] = "OK"; - iq.send(block=False); - - # The session is complete, delete it - del self.sessions[session]; - - - # ================================================================= - # Client side (data controller) API - - def set_request(self, from_jid, to_jid, callback, fields, nodeIds=None): - """ - Called on the client side to initiade a control request. - Composes a message with the request and sends it to the device(s). - Does not block, the callback will be called when the device(s) - has responded. - - Arguments: - from_jid -- The jid of the requester - to_jid -- The jid of the device(s) - callback -- The callback function to call when data is availble. - - The callback function must support the following arguments: - - from_jid -- The jid of the responding device(s) - result -- The result of the control request. Valid values are: - "OK" - Control request completed successfully - "NotFound" - One or more nodes or fields are missing - "InsufficientPrivileges" - Not authorized. - "Locked" - Field(s) is locked and cannot - be changed at the moment. - "NotImplemented" - Request feature not implemented. - "FormError" - Error while setting with - a form (not implemented). - "OtherError" - Indicates other types of - errors, such as timeout. - Details in the error_msg. - - - nodeId -- [optional] Only applicable when result == "error" - List of node Ids of failing device(s). - - fields -- [optional] Only applicable when result == "error" - List of fields that failed.[optional] Mandatory when result == "rejected" or "failure". - - error_msg -- Details about why the request failed. - - fields -- Fields to set. List of tuple format: (name, typename, value). - nodeIds -- [optional] Limits the request to the node Ids in this list. - """ - iq = self.xmpp.Iq(); - iq['from'] = from_jid; - iq['to'] = to_jid; - seqnr = self._get_new_seqnr(); - iq['id'] = seqnr; - iq['type'] = "set"; - if nodeIds is not None: - for nodeId in nodeIds: - iq['set'].add_node(nodeId); - if fields is not None: - for name, typename, value in fields: - iq['set'].add_data(name=name, typename=typename, value=value); - - self.sessions[seqnr] = {"from": iq['from'], "to": iq['to'], "callback": callback}; - iq.send(block=False); - - def set_command(self, from_jid, to_jid, fields, nodeIds=None): - """ - Called on the client side to initiade a control command. - Composes a message with the set commandand sends it to the device(s). - Does not block. Device(s) will not respond, regardless of result. - - Arguments: - from_jid -- The jid of the requester - to_jid -- The jid of the device(s) - - fields -- Fields to set. List of tuple format: (name, typename, value). - nodeIds -- [optional] Limits the request to the node Ids in this list. - """ - msg = self.xmpp.Message(); - msg['from'] = from_jid; - msg['to'] = to_jid; - msg['type'] = "set"; - if nodeIds is not None: - for nodeId in nodeIds: - msg['set'].add_node(nodeId); - if fields is not None: - for name, typename, value in fields: - msg['set'].add_data(name, typename, value); - - # We won't get any reply, so don't create a session - msg.send(); - - def _handle_set_response(self, iq): - """ Received response from device(s) """ - #print("ooh") - seqnr = iq['id']; - from_jid = str(iq['from']); - result = iq['setResponse']['responseCode']; - nodeIds = [n['name'] for n in iq['setResponse']['nodes']]; - fields = [f['name'] for f in iq['setResponse']['datas']]; - error_msg = None; - - if not iq['setResponse'].find('error') is None and not iq['setResponse']['error']['text'] == "": - error_msg = iq['setResponse']['error']['text']; - - callback = self.sessions[seqnr]["callback"]; - callback(from_jid=from_jid, result=result, nodeIds=nodeIds, fields=fields, error_msg=error_msg); - - |