Merge branch 'release-0.2.5'

13 files changed, 1383 insertions, 536 deletions

diff --git a/src/leap/common/events/Makefile b/src/leap/common/events/Makefile
index 4f99f35..4f73dea 100644
--- a/src/leap/common/events/Makefile
+++ b/src/leap/common/events/Makefile
@@ -21,10 +21,11 @@
 
 PROTOC = protoc
 
-all: signal_pb2.py
+all: events_pb2.py
 
 %_pb2.py: %.proto
 	$(PROTOC) --python_out=./ $<
+	autopep8 --in-place --aggressive $@
 
 clean:
 	rm -f *_pb2.py
diff --git a/src/leap/common/events/README.rst b/src/leap/common/events/README.rst
new file mode 100644
index 0000000..813be8b
--- /dev/null
+++ b/src/leap/common/events/README.rst
@@ -0,0 +1,53 @@
+Events mechanism
+================
+
+The events mechanism allows for "components" to send signal events to each
+other by means of a centralized server. Components can register with the
+server to receive signals of certain types, and they can also send signals to
+the server that will then redistribute these signals to registered components.
+
+
+Listening daemons
+-----------------
+
+Both components and the server listen for incoming messages by using a
+listening daemon that runs in its own thread. The server daemon has to be
+started explicitly, while components daemon will be started whenever a
+component registers with the server to receive messages.
+
+
+How to use it
+-------------
+
+To start the events server:
+
+>>> from leap.common.events import server
+>>> server.ensure_server(port=8090)
+
+To register a callback to be called when a given signal is raised:
+
+>>> from leap.common.events import (
+>>>     register,
+>>>     events_pb2 as proto,
+>>> )
+>>>
+>>> def mycallback(sigreq):
+>>>     print str(sigreq)
+>>>
+>>> events.register(signal=proto.CLIENT_UID, callback=mycallback)
+
+To signal an event:
+
+>>> from leap.common.events import (
+>>>     signal,
+>>>     events_pb2 as proto,
+>>> )
+>>> signal(proto.CLIENT_UID)
+
+Adding events
+-------------
+
+* Add the new event under enum ``Event`` in ``events.proto`` 
+* Compile the new protocolbuffers file::
+
+  make
diff --git a/src/leap/common/events/__init__.py b/src/leap/common/events/__init__.py
index 27542a9..12416e4 100644
--- a/src/leap/common/events/__init__.py
+++ b/src/leap/common/events/__init__.py
@@ -15,37 +15,111 @@
 # You should have received a copy of the GNU General Public License
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
+"""
+An events mechanism that allows for signaling of events between components.
+"""
+
+import logging
+import socket
+
+
 from leap.common.events import (
-    signal_pb2,
+    events_pb2 as proto,
+    server,
+    component,
+    daemon,
 )
 
 
-# the `registered_callbacks` dictionary below should have the following
-# format:
-#
-#     { component: [ (uid, callback), ... ], ... }
-#
-registered_callbacks = {}
+logger = logging.getLogger(__name__)
+
+
+def register(signal, callback, uid=None, replace=False, reqcbk=None,
+             timeout=1000):
+    """
+    Register a callback to be called when the given signal is received.
+
+    Will timeout after timeout ms if response has not been received. The
+    timeout arg is only used for asynch requests. If a reqcbk callback has
+    been supplied the timeout arg is not used. The response value will be
+    returned for a synch request but nothing will be returned for an asynch
+    request.
+
+    :param signal: the signal that causes the callback to be launched
+    :type signal: int (see the `events.proto` file)
+    :param callback: the callback to be called when the signal is received
+    :type callback: function
+    :param uid: a unique id for the callback
+    :type uid: int
+    :param replace: should an existent callback with same uid be replaced?
+    :type replace: bool
+    :param reqcbk: a callback to be called when a response from server is
+        received
+    :type reqcbk: function
+        callback(leap.common.events.events_pb2.EventResponse)
+    :param timeout: the timeout for synch calls
+    :type timeout: int
+
+    :return: the response from server for synch calls or nothing for asynch
+        calls.
+    :rtype: leap.common.events.events_pb2.EventsResponse or None
+    """
+    return component.register(signal, callback, uid, replace, reqcbk, timeout)
+
+
+def unregister(signal, uid=None, reqcbk=None, timeout=1000):
+    """
+    Unregister a callback.
+
+    If C{uid} is specified, unregisters only the callback identified by that
+    unique id. Otherwise, unregisters all callbacks registered for C{signal}.
 
+    :param signal: the signal that causes the callback to be launched
+    :type signal: int (see the `events.proto` file)
+    :param uid: a unique id for the callback
+    :type uid: int
+    :param reqcbk: a callback to be called when a response from server is
+        received
+    :type reqcbk: function
+        callback(leap.common.events.events_pb2.EventResponse)
+    :param timeout: the timeout for synch calls
+    :type timeout: int
 
-def register(signal, callback, uid=None, replace=False):
+    :return: the response from server for synch calls or nothing for asynch
+        calls.
+    :rtype: leap.common.events.events_pb2.EventsResponse or None
     """
-    Registers `callback` to be called when `signal` is signaled.
+    return component.unregister(signal, uid, reqcbk, timeout)
+
+
+def signal(signal, content="", mac_method="", mac="", reqcbk=None,
+           timeout=1000):
+    """
+    Send `signal` event to events server.
+
+    Will timeout after timeout ms if response has not been received. The
+    timeout arg is only used for asynch requests.  If a reqcbk callback has
+    been supplied the timeout arg is not used. The response value will be
+    returned for a synch request but nothing will be returned for an asynch
+    request.
+
+    :param signal: the signal that causes the callback to be launched
+    :type signal: int (see the `events.proto` file)
+    :param content: the contents of the event signal
+    :type content: str
+    :param mac_method: the method used to auth mac
+    :type mac_method: str
+    :param mac: the content of the auth mac
+    :type mac: str
+    :param reqcbk: a callback to be called when a response from server is
+        received
+    :type reqcbk: function
+        callback(leap.common.events.events_pb2.EventResponse)
+    :param timeout: the timeout for synch calls
+    :type timeout: int
+
+    :return: the response from server for synch calls or nothing for asynch
+        calls.
+    :rtype: leap.common.events.events_pb2.EventsResponse or None
     """
-    if not registered_callbacks.has_key(signal):
-        registered_callbacks[signal] = []
-    cbklist = registered_callbacks[signal]
-    if uid and filter(lambda (x,y): x == uid, cbklist):
-        # TODO: create appropriate exception
-        if not replace:
-            raise Exception("Callback already registered.")
-        else:
-            registered_callbacks[signal] = filter(lambda(x,y): x != uid,
-                                                  cbklist)
-    registered_callbacks[signal].append((uid, callback))
-    return uid
-
-#def get_registered_callbacks():
-#    return registered_callbacks
-
-#__all__ = ['signal_pb2', 'service', 'register', 'registered_callbacks']
+    return component.signal(signal, content, mac_method, mac, reqcbk, timeout)
diff --git a/src/leap/common/events/component.py b/src/leap/common/events/component.py
new file mode 100644
index 0000000..029d1ac
--- /dev/null
+++ b/src/leap/common/events/component.py
@@ -0,0 +1,290 @@
+# -*- coding: utf-8 -*-
+# component.py
+# Copyright (C) 2013 LEAP
+#
+# 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 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 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/>.
+
+"""
+The component end point of the events mechanism.
+
+Components are the communicating parties of the events mechanism. They
+communicate by sending messages to a server, which in turn redistributes
+messages to other components.
+
+When a component registers a callback for a given signal, it also tells the
+server that it wants to be notified whenever signals of that type are sent by
+some other component.
+"""
+
+
+import logging
+import threading
+
+
+from protobuf.socketrpc import RpcService
+from leap.common.events import (
+    events_pb2 as proto,
+    server,
+    daemon,
+    mac_auth,
+)
+
+
+logger = logging.getLogger(__name__)
+
+
+# the `registered_callbacks` dictionary below should have the following
+# format:
+#
+#     { event_signal: [ (uid, callback), ... ], ... }
+#
+registered_callbacks = {}
+
+
+class CallbackAlreadyRegistered(Exception):
+    """
+    Raised when trying to register an already registered callback.
+    """
+    pass
+
+
+def ensure_component_daemon():
+    """
+    Ensure the component daemon is running and listening for incoming
+    messages.
+
+    :return: the daemon instance
+    :rtype: EventsComponentDaemon
+    """
+    import time
+    daemon = EventsComponentDaemon.ensure(0)
+    logger.debug('ensure component daemon')
+
+    # Because we use a random port we want to wait until a port is assigned to
+    # local component daemon.
+
+    while not (EventsComponentDaemon.get_instance() and
+               EventsComponentDaemon.get_instance().get_port()):
+        time.sleep(0.1)
+    return daemon
+
+
+def register(signal, callback, uid=None, replace=False, reqcbk=None,
+             timeout=1000):
+    """
+    Registers a callback to be called when a specific signal event is
+    received.
+
+    Will timeout after timeout ms if response has not been received. The
+    timeout arg is only used for asynch requests. If a reqcbk callback has
+    been supplied the timeout arg is not used. The response value will be
+    returned for a synch request but nothing will be returned for an asynch
+    request.
+
+    :param signal: the signal that causes the callback to be launched
+    :type signal: int (see the `events.proto` file)
+    :param callback: the callback to be called when the signal is received
+    :type callback: function
+        callback(leap.common.events.events_pb2.SignalRequest)
+    :param uid: a unique id for the callback
+    :type uid: int
+    :param replace: should an existent callback with same uid be replaced?
+    :type replace: bool
+    :param reqcbk: a callback to be called when a response from server is
+        received
+    :type reqcbk: function
+        callback(leap.common.events.events_pb2.EventResponse)
+    :param timeout: the timeout for synch calls
+    :type timeout: int
+
+    Might raise a CallbackAlreadyRegistered exception if there's already a
+    callback identified by the given uid and replace is False.
+
+    :return: the response from server for synch calls or nothing for asynch
+        calls.
+    :rtype: leap.common.events.events_pb2.EventsResponse or None
+    """
+    ensure_component_daemon()  # so we can receive registered signals
+    # register callback locally
+    if signal not in registered_callbacks:
+        registered_callbacks[signal] = []
+    cbklist = registered_callbacks[signal]
+    if uid and filter(lambda (x, y): x == uid, cbklist):
+        if not replace:
+            raise CallbackAlreadyRegisteredException()
+        else:
+            registered_callbacks[signal] = filter(lambda(x, y): x != uid,
+                                                  cbklist)
+    registered_callbacks[signal].append((uid, callback))
+    # register callback on server
+    request = proto.RegisterRequest()
+    request.event = signal
+    request.port = EventsComponentDaemon.get_instance().get_port()
+    request.mac_method = mac_auth.MacMethod.MAC_NONE
+    request.mac = ""
+    service = RpcService(proto.EventsServerService_Stub,
+                         server.SERVER_PORT, 'localhost')
+    logger.info(
+        "Sending registration request to server on port %s: %s",
+        server.SERVER_PORT,
+        str(request)[:40])
+    return service.register(request, callback=reqcbk, timeout=timeout)
+
+def unregister(signal, uid=None, reqcbk=None, timeout=1000):
+    """
+    Unregister a callback.
+
+    If C{uid} is specified, unregisters only the callback identified by that
+    unique id. Otherwise, unregisters all callbacks
+
+    :param signal: the signal that causes the callback to be launched
+    :type signal: int (see the `events.proto` file)
+    :param uid: a unique id for the callback
+    :type uid: int
+    :param reqcbk: a callback to be called when a response from server is
+        received
+    :type reqcbk: function
+        callback(leap.common.events.events_pb2.EventResponse)
+    :param timeout: the timeout for synch calls
+    :type timeout: int
+
+    :return: the response from server for synch calls or nothing for asynch
+        calls or None if no callback is registered for that signal or uid.
+    :rtype: leap.common.events.events_pb2.EventsResponse or None
+    """
+    if signal not in registered_callbacks or not registered_callbacks[signal]:
+        logger.warning("No callback registered for signal %d." % signal)
+        return None
+    # unregister callback locally
+    cbklist = registered_callbacks[signal]
+    if uid is not None:
+        if filter(lambda (cbkuid, _): cbkuid == uid, cbklist) == []:
+            logger.warning("No callback registered for uid %d." % st)
+            return None
+        registered_callbacks[signal] = filter(lambda(x, y): x != uid, cbklist)
+    else:
+        # exclude all callbacks for given signal
+        registered_callbacks[signal] = []
+    # unregister port in server if there are no more callbacks for this signal
+    if not registered_callbacks[signal]:
+        request = proto.UnregisterRequest()
+        request.event = signal
+        request.port = EventsComponentDaemon.get_instance().get_port()
+        request.mac_method = mac_auth.MacMethod.MAC_NONE
+        request.mac = ""
+        service = RpcService(proto.EventsServerService_Stub,
+                             server.SERVER_PORT, 'localhost')
+        logger.info(
+            "Sending unregistration request to server on port %s: %s",
+            server.SERVER_PORT,
+            str(request)[:40])
+        return service.unregister(request, callback=reqcbk, timeout=timeout)
+
+
+def signal(signal, content="", mac_method="", mac="", reqcbk=None,
+           timeout=1000):
+    """
+    Send `signal` event to events server.
+
+    Will timeout after timeout ms if response has not been received. The
+    timeout arg is only used for asynch requests.  If a reqcbk callback has
+    been supplied the timeout arg is not used. The response value will be
+    returned for a synch request but nothing will be returned for an asynch
+    request.
+
+    :param signal: the signal that causes the callback to be launched
+    :type signal: int (see the `events.proto` file)
+    :param content: the contents of the event signal
+    :type content: str
+    :param mac_method: the method used for auth mac
+    :type mac_method: str
+    :param mac: the content of the auth mac
+    :type mac: str
+    :param reqcbk: a callback to be called when a response from server is
+        received
+    :type reqcbk: function
+        callback(leap.common.events.events_pb2.EventResponse)
+    :param timeout: the timeout for synch calls
+    :type timeout: int
+
+    :return: the response from server for synch calls or nothing for asynch
+        calls.
+    :rtype: leap.common.events.events_pb2.EventsResponse or None
+    """
+    request = proto.SignalRequest()
+    request.event = signal
+    request.content = content
+    request.mac_method = mac_method
+    request.mac = mac
+    service = RpcService(proto.EventsServerService_Stub, server.SERVER_PORT,
+                         'localhost')
+    logger.info("Sending signal to server: %s", str(request)[:40])
+    return service.signal(request, callback=reqcbk, timeout=timeout)
+
+
+class EventsComponentService(proto.EventsComponentService):
+    """
+    Service for receiving signal events in components.
+    """
+
+    def __init__(self):
+        proto.EventsComponentService.__init__(self)
+
+    def signal(self, controller, request, done):
+        """
+        Receive a signal and run callbacks registered for that signal.
+
+        This method is called whenever a signal request is received from
+        server.
+
+        :param controller: used to mediate a single method call
+        :type controller: protobuf.socketrpc.controller.SocketRpcController
+        :param request: the request received from the component
+        :type request: leap.common.events.events_pb2.SignalRequest
+        :param done: callback to be called when done
+        :type done: protobuf.socketrpc.server.Callback
+        """
+        logger.info('Received signal from server: %s...' % str(request)[:40])
+
+        # run registered callbacks
+        # TODO: verify authentication using mac in incoming message
+        if request.event in registered_callbacks:
+            for (_, cbk) in registered_callbacks[request.event]:
+                # callbacks should be prepared to receive a
+                # events_pb2.SignalRequest.
+                cbk(request)
+
+        # send response back to server
+        response = proto.EventResponse()
+        response.status = proto.EventResponse.OK
+        done.run(response)
+
+
+class EventsComponentDaemon(daemon.EventsSingletonDaemon):
+    """
+    A daemon that listens for incoming events from server.
+    """
+
+    @classmethod
+    def ensure(cls, port):
+        """
+        Make sure the daemon is running on the given port.
+
+        :param port: the port in which the daemon should listen
+        :type port: int
+
+        :return: a daemon instance
+        :rtype: EventsComponentDaemon
+        """
+        return cls.ensure_service(port, EventsComponentService())
diff --git a/src/leap/common/events/daemon.py b/src/leap/common/events/daemon.py
new file mode 100644
index 0000000..c253948
--- /dev/null
+++ b/src/leap/common/events/daemon.py
@@ -0,0 +1,208 @@
+# -*- coding: utf-8 -*-
+# daemon.py
+# Copyright (C) 2013 LEAP
+#
+# 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 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 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/>.
+
+"""
+A singleton daemon for running RPC services using protobuf.socketrpc.
+"""
+
+
+import logging
+import threading
+
+
+from protobuf.socketrpc.server import (
+    SocketRpcServer,
+    ThreadedTCPServer,
+    SocketHandler,
+)
+
+
+logger = logging.getLogger(__name__)
+
+
+class ServiceAlreadyRunningException(Exception):
+    """
+    Raised whenever a service is already running in this process but someone
+    attemped to start it in a different port.
+    """
+
+
+class EventsRpcServer(SocketRpcServer):
+    """
+    RPC server used in server and component interfaces to receive messages.
+    """
+
+    def __init__(self, port, host='localhost'):
+        """
+        Initialize a RPC server.
+
+        :param port: the port in which to listen for incoming messages
+        :type port: int
+        :param host: the address to bind to
+        :type host: str
+        """
+        SocketRpcServer.__init__(self, port, host)
+        self._server = None
+
+    def run(self):
+        """
+        Run the server.
+        """
+        logger.info('Running server on port %d.' % self.port)
+        # parent implementation does not hold the server instance, so we do it
+        # here.
+        self._server = ThreadedTCPServer((self.host, self.port),
+                                         SocketHandler, self)
+        # if we chose to use a random port, fetch the port number info.
+        if self.port is 0:
+            self.port = self._server.socket.getsockname()[1]
+        self._server.serve_forever()
+
+    def stop(self):
+        """
+        Stop the server.
+        """
+        self._server.shutdown()
+
+
+class EventsSingletonDaemon(threading.Thread):
+    """
+    Singleton class for for launching and terminating a daemon.
+
+    This class is used so every part of the mechanism that needs to listen for
+    messages can launch its own daemon (thread) to do the job.
+    """
+
+    # Singleton instance
+    __instance = None
+
+    def __new__(cls, *args, **kwargs):
+        """
+        Return a singleton instance if it exists or create and initialize one.
+        """
+        if len(args) is not 2:
+            raise TypeError("__init__() takes exactly 2 arguments (%d given)"
+                            % len(args))
+        if cls.__instance is None:
+            cls.__instance = object.__new__(
+                EventsSingletonDaemon)
+            cls.__initialize(cls.__instance, args[0], args[1])
+        return cls.__instance
+
+    @staticmethod
+    def __initialize(self, port, service):
+        """
+        Initialize a singleton daemon.
+
+        This is a static method disguised as instance method that actually
+        does the initialization of the daemon instance.
+
+        :param port: the port in which to listen for incoming messages
+        :type port: int
+        :param service: the service to provide in this daemon
+        :type service: google.protobuf.service.Service
+        """
+        threading.Thread.__init__(self)
+        self._port = port
+        self._service = service
+        self._server = EventsRpcServer(self._port)
+        self._server.registerService(self._service)
+        self.daemon = True
+
+    def __init__(self):
+        """
+        Singleton placeholder initialization method.
+
+        Initialization is made in __new__ so we can always return the same
+        instance upon object creation.
+        """
+        pass
+
+    @classmethod
+    def ensure(cls, port):
+        """
+        Make sure the daemon instance is running.
+
+        Each implementation of this method should call `self.ensure_service`
+        with the appropriate service from the `events.proto` definitions, and
+        return the daemon instance.
+
+        :param port: the port in which the daemon should be listening
+        :type port: int
+
+        :return: a daemon instance
+        :rtype: EventsSingletonDaemon
+        """
+        raise NotImplementedError(self.ensure)
+
+    @classmethod
+    def ensure_service(cls, port, service):
+        """
+        Start the singleton instance if not already running.
+
+        Might return ServiceAlreadyRunningException
+
+        :param port: the port in which the daemon should be listening
+        :type port: int
+
+        :return: a daemon instance
+        :rtype: EventsSingletonDaemon
+        """
+        daemon = cls(port, service)
+        if not daemon.is_alive():
+            daemon.start()
+        elif port and port != cls.__instance._port:
+            # service is running in this process but someone is trying to
+            # start it in another port
+            raise ServiceAlreadyRunningException(
+                "Service is already running in this process on port %d."
+                % self.__instance._port)
+        return daemon
+
+    @classmethod
+    def get_instance(cls):
+        """
+        Retrieve singleton instance of this daemon.
+
+        :return: a daemon instance
+        :rtype: EventsSingletonDaemon
+        """
+        return cls.__instance
+
+    def run(self):
+        """
+        Run the server.
+        """
+        self._server.run()
+
+    def stop(self):
+        """
+        Stop the daemon.
+        """
+        self._server.stop()
+
+    def get_port(self):
+        """
+        Retrieve the value of the port to which the service running in this
+        daemon is binded to.
+
+        :return: the port to which the daemon is binded to
+        :rtype: int
+        """
+        if self._port is 0:
+            self._port = self._server.port
+        return self._port
diff --git a/src/leap/common/events/events.proto b/src/leap/common/events/events.proto
new file mode 100644
index 0000000..a813ed1
--- /dev/null
+++ b/src/leap/common/events/events.proto
@@ -0,0 +1,79 @@
+// signal.proto
+// Copyright (C) 2013 LEAP
+//
+// 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 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 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/>.
+
+package leap.common.events;
+option py_generic_services = true;
+
+enum Event {
+  CLIENT_SESSION_ID = 1;
+  CLIENT_UID = 2;
+  SOLEDAD_CREATING_KEYS = 3;
+  SOLEDAD_DONE_CREATING_KEYS = 4;
+  SOLEDAD_UPLOADING_KEYS = 5;
+  SOLEDAD_DONE_UPLOADING_KEYS = 6;
+  SOLEDAD_DOWNLOADING_KEYS = 7;
+  SOLEDAD_DONE_DOWNLOADING_KEYS = 8;
+  SOLEDAD_NEW_DATA_TO_SYNC = 9;
+  SOLEDAD_DONE_DATA_SYNC = 10;
+  UPDATER_NEW_UPDATES = 11;
+  UPDATER_DONE_UPDATING = 12;
+  RAISE_WINDOW = 13;
+}
+
+message SignalRequest {
+  required Event event = 1;
+  required string content = 2;
+  required string mac_method = 3;
+  required bytes mac = 4;
+  optional string enc_method = 5;
+  optional bool error_occurred = 6;
+}
+
+message RegisterRequest {
+  required Event event = 1;
+  required int32 port = 2;
+  required string mac_method = 3;
+  required bytes mac = 4;
+}
+
+message UnregisterRequest {
+  required Event event = 1;
+  required int32 port = 2;
+  required string mac_method = 3;
+  required bytes mac = 4;
+}
+
+message EventResponse {
+
+  enum Status {
+    OK = 1;
+    UNAUTH = 2;
+    ERROR = 3;
+  }
+
+  required Status status = 1;
+  optional string result = 2;
+}
+
+service EventsServerService {
+  rpc register(RegisterRequest) returns (EventResponse);
+  rpc unregister(UnregisterRequest) returns (EventResponse);
+  rpc signal(SignalRequest) returns (EventResponse);
+}
+
+service EventsComponentService {
+  rpc signal(SignalRequest) returns (EventResponse);
+}
diff --git a/src/leap/common/events/events_pb2.py b/src/leap/common/events/events_pb2.py
new file mode 100644
index 0000000..5b1c118
--- /dev/null
+++ b/src/leap/common/events/events_pb2.py
@@ -0,0 +1,444 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: events.proto
+
+from google.protobuf.internal import enum_type_wrapper
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import service as _service
+from google.protobuf import service_reflection
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+    name='events.proto',
+    package='leap.common.events',
+    serialized_pb='\n\x0c\x65vents.proto\x12\x12leap.common.events\"\x97\x01\n\rSignalRequest\x12(\n\x05\x65vent\x18\x01 \x02(\x0e\x32\x19.leap.common.events.Event\x12\x0f\n\x07\x63ontent\x18\x02 \x02(\t\x12\x12\n\nmac_method\x18\x03 \x02(\t\x12\x0b\n\x03mac\x18\x04 \x02(\x0c\x12\x12\n\nenc_method\x18\x05 \x01(\t\x12\x16\n\x0e\x65rror_occurred\x18\x06 \x01(\x08\"j\n\x0fRegisterRequest\x12(\n\x05\x65vent\x18\x01 \x02(\x0e\x32\x19.leap.common.events.Event\x12\x0c\n\x04port\x18\x02 \x02(\x05\x12\x12\n\nmac_method\x18\x03 \x02(\t\x12\x0b\n\x03mac\x18\x04 \x02(\x0c\"l\n\x11UnregisterRequest\x12(\n\x05\x65vent\x18\x01 \x02(\x0e\x32\x19.leap.common.events.Event\x12\x0c\n\x04port\x18\x02 \x02(\x05\x12\x12\n\nmac_method\x18\x03 \x02(\t\x12\x0b\n\x03mac\x18\x04 \x02(\x0c\"\x82\x01\n\rEventResponse\x12\x38\n\x06status\x18\x01 \x02(\x0e\x32(.leap.common.events.EventResponse.Status\x12\x0e\n\x06result\x18\x02 \x01(\t\"\'\n\x06Status\x12\x06\n\x02OK\x10\x01\x12\n\n\x06UNAUTH\x10\x02\x12\t\n\x05\x45RROR\x10\x03*\xe7\x02\n\x05\x45vent\x12\x15\n\x11\x43LIENT_SESSION_ID\x10\x01\x12\x0e\n\nCLIENT_UID\x10\x02\x12\x19\n\x15SOLEDAD_CREATING_KEYS\x10\x03\x12\x1e\n\x1aSOLEDAD_DONE_CREATING_KEYS\x10\x04\x12\x1a\n\x16SOLEDAD_UPLOADING_KEYS\x10\x05\x12\x1f\n\x1bSOLEDAD_DONE_UPLOADING_KEYS\x10\x06\x12\x1c\n\x18SOLEDAD_DOWNLOADING_KEYS\x10\x07\x12!\n\x1dSOLEDAD_DONE_DOWNLOADING_KEYS\x10\x08\x12\x1c\n\x18SOLEDAD_NEW_DATA_TO_SYNC\x10\t\x12\x1a\n\x16SOLEDAD_DONE_DATA_SYNC\x10\n\x12\x17\n\x13UPDATER_NEW_UPDATES\x10\x0b\x12\x19\n\x15UPDATER_DONE_UPDATING\x10\x0c\x12\x10\n\x0cRAISE_WINDOW\x10\r2\x91\x02\n\x13\x45ventsServerService\x12R\n\x08register\x12#.leap.common.events.RegisterRequest\x1a!.leap.common.events.EventResponse\x12V\n\nunregister\x12%.leap.common.events.UnregisterRequest\x1a!.leap.common.events.EventResponse\x12N\n\x06signal\x12!.leap.common.events.SignalRequest\x1a!.leap.common.events.EventResponse2h\n\x16\x45ventsComponentService\x12N\n\x06signal\x12!.leap.common.events.SignalRequest\x1a!.leap.common.events.EventResponseB\x03\x90\x01\x01')
+
+_EVENT = _descriptor.EnumDescriptor(
+    name='Event',
+    full_name='leap.common.events.Event',
+    filename=None,
+    file=DESCRIPTOR,
+    values=[
+        _descriptor.EnumValueDescriptor(
+            name='CLIENT_SESSION_ID', index=0, number=1,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='CLIENT_UID', index=1, number=2,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_CREATING_KEYS', index=2, number=3,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_DONE_CREATING_KEYS', index=3, number=4,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_UPLOADING_KEYS', index=4, number=5,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_DONE_UPLOADING_KEYS', index=5, number=6,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_DOWNLOADING_KEYS', index=6, number=7,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_DONE_DOWNLOADING_KEYS', index=7, number=8,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_NEW_DATA_TO_SYNC', index=8, number=9,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='SOLEDAD_DONE_DATA_SYNC', index=9, number=10,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='UPDATER_NEW_UPDATES', index=10, number=11,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='UPDATER_DONE_UPDATING', index=11, number=12,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='RAISE_WINDOW', index=12, number=13,
+            options=None,
+            type=None),
+    ],
+    containing_type=None,
+    options=None,
+    serialized_start=542,
+    serialized_end=901,
+)
+
+Event = enum_type_wrapper.EnumTypeWrapper(_EVENT)
+CLIENT_SESSION_ID = 1
+CLIENT_UID = 2
+SOLEDAD_CREATING_KEYS = 3
+SOLEDAD_DONE_CREATING_KEYS = 4
+SOLEDAD_UPLOADING_KEYS = 5
+SOLEDAD_DONE_UPLOADING_KEYS = 6
+SOLEDAD_DOWNLOADING_KEYS = 7
+SOLEDAD_DONE_DOWNLOADING_KEYS = 8
+SOLEDAD_NEW_DATA_TO_SYNC = 9
+SOLEDAD_DONE_DATA_SYNC = 10
+UPDATER_NEW_UPDATES = 11
+UPDATER_DONE_UPDATING = 12
+RAISE_WINDOW = 13
+
+
+_EVENTRESPONSE_STATUS = _descriptor.EnumDescriptor(
+    name='Status',
+    full_name='leap.common.events.EventResponse.Status',
+    filename=None,
+    file=DESCRIPTOR,
+    values=[
+        _descriptor.EnumValueDescriptor(
+            name='OK', index=0, number=1,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='UNAUTH', index=1, number=2,
+            options=None,
+            type=None),
+        _descriptor.EnumValueDescriptor(
+            name='ERROR', index=2, number=3,
+            options=None,
+            type=None),
+    ],
+    containing_type=None,
+    options=None,
+    serialized_start=500,
+    serialized_end=539,
+)
+
+
+_SIGNALREQUEST = _descriptor.Descriptor(
+    name='SignalRequest',
+    full_name='leap.common.events.SignalRequest',
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name='event', full_name='leap.common.events.SignalRequest.event', index=0,
+            number=1, type=14, cpp_type=8, label=2,
+            has_default_value=False, default_value=1,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='content', full_name='leap.common.events.SignalRequest.content', index=1,
+            number=2, type=9, cpp_type=9, label=2,
+            has_default_value=False, default_value=unicode("", "utf-8"),
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='mac_method', full_name='leap.common.events.SignalRequest.mac_method', index=2,
+            number=3, type=9, cpp_type=9, label=2,
+            has_default_value=False, default_value=unicode("", "utf-8"),
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='mac', full_name='leap.common.events.SignalRequest.mac', index=3,
+            number=4, type=12, cpp_type=9, label=2,
+            has_default_value=False, default_value="",
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='enc_method', full_name='leap.common.events.SignalRequest.enc_method', index=4,
+            number=5, type=9, cpp_type=9, label=1,
+            has_default_value=False, default_value=unicode("", "utf-8"),
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='error_occurred', full_name='leap.common.events.SignalRequest.error_occurred', index=5,
+            number=6, type=8, cpp_type=7, label=1,
+            has_default_value=False, default_value=False,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+    ],
+    extensions=[
+    ],
+    nested_types=[],
+    enum_types=[
+    ],
+    options=None,
+    is_extendable=False,
+    extension_ranges=[],
+    serialized_start=37,
+    serialized_end=188,
+)
+
+
+_REGISTERREQUEST = _descriptor.Descriptor(
+    name='RegisterRequest',
+    full_name='leap.common.events.RegisterRequest',
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name='event', full_name='leap.common.events.RegisterRequest.event', index=0,
+            number=1, type=14, cpp_type=8, label=2,
+            has_default_value=False, default_value=1,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='port', full_name='leap.common.events.RegisterRequest.port', index=1,
+            number=2, type=5, cpp_type=1, label=2,
+            has_default_value=False, default_value=0,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='mac_method', full_name='leap.common.events.RegisterRequest.mac_method', index=2,
+            number=3, type=9, cpp_type=9, label=2,
+            has_default_value=False, default_value=unicode("", "utf-8"),
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='mac', full_name='leap.common.events.RegisterRequest.mac', index=3,
+            number=4, type=12, cpp_type=9, label=2,
+            has_default_value=False, default_value="",
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+    ],
+    extensions=[
+    ],
+    nested_types=[],
+    enum_types=[
+    ],
+    options=None,
+    is_extendable=False,
+    extension_ranges=[],
+    serialized_start=190,
+    serialized_end=296,
+)
+
+
+_UNREGISTERREQUEST = _descriptor.Descriptor(
+    name='UnregisterRequest',
+    full_name='leap.common.events.UnregisterRequest',
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name='event', full_name='leap.common.events.UnregisterRequest.event', index=0,
+            number=1, type=14, cpp_type=8, label=2,
+            has_default_value=False, default_value=1,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='port', full_name='leap.common.events.UnregisterRequest.port', index=1,
+            number=2, type=5, cpp_type=1, label=2,
+            has_default_value=False, default_value=0,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='mac_method', full_name='leap.common.events.UnregisterRequest.mac_method', index=2,
+            number=3, type=9, cpp_type=9, label=2,
+            has_default_value=False, default_value=unicode("", "utf-8"),
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='mac', full_name='leap.common.events.UnregisterRequest.mac', index=3,
+            number=4, type=12, cpp_type=9, label=2,
+            has_default_value=False, default_value="",
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+    ],
+    extensions=[
+    ],
+    nested_types=[],
+    enum_types=[
+    ],
+    options=None,
+    is_extendable=False,
+    extension_ranges=[],
+    serialized_start=298,
+    serialized_end=406,
+)
+
+
+_EVENTRESPONSE = _descriptor.Descriptor(
+    name='EventResponse',
+    full_name='leap.common.events.EventResponse',
+    filename=None,
+    file=DESCRIPTOR,
+    containing_type=None,
+    fields=[
+        _descriptor.FieldDescriptor(
+            name='status', full_name='leap.common.events.EventResponse.status', index=0,
+            number=1, type=14, cpp_type=8, label=2,
+            has_default_value=False, default_value=1,
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+        _descriptor.FieldDescriptor(
+            name='result', full_name='leap.common.events.EventResponse.result', index=1,
+            number=2, type=9, cpp_type=9, label=1,
+            has_default_value=False, default_value=unicode("", "utf-8"),
+            message_type=None, enum_type=None, containing_type=None,
+            is_extension=False, extension_scope=None,
+            options=None),
+    ],
+    extensions=[
+    ],
+    nested_types=[],
+    enum_types=[
+        _EVENTRESPONSE_STATUS,
+    ],
+    options=None,
+    is_extendable=False,
+    extension_ranges=[],
+    serialized_start=409,
+    serialized_end=539,
+)
+
+_SIGNALREQUEST.fields_by_name['event'].enum_type = _EVENT
+_REGISTERREQUEST.fields_by_name['event'].enum_type = _EVENT
+_UNREGISTERREQUEST.fields_by_name['event'].enum_type = _EVENT
+_EVENTRESPONSE.fields_by_name['status'].enum_type = _EVENTRESPONSE_STATUS
+_EVENTRESPONSE_STATUS.containing_type = _EVENTRESPONSE
+DESCRIPTOR.message_types_by_name['SignalRequest'] = _SIGNALREQUEST
+DESCRIPTOR.message_types_by_name['RegisterRequest'] = _REGISTERREQUEST
+DESCRIPTOR.message_types_by_name['UnregisterRequest'] = _UNREGISTERREQUEST
+DESCRIPTOR.message_types_by_name['EventResponse'] = _EVENTRESPONSE
+
+
+class SignalRequest(_message.Message):
+    __metaclass__ = _reflection.GeneratedProtocolMessageType
+    DESCRIPTOR = _SIGNALREQUEST
+
+    # @@protoc_insertion_point(class_scope:leap.common.events.SignalRequest)
+
+
+class RegisterRequest(_message.Message):
+    __metaclass__ = _reflection.GeneratedProtocolMessageType
+    DESCRIPTOR = _REGISTERREQUEST
+
+    # @@protoc_insertion_point(class_scope:leap.common.events.RegisterRequest)
+
+
+class UnregisterRequest(_message.Message):
+    __metaclass__ = _reflection.GeneratedProtocolMessageType
+    DESCRIPTOR = _UNREGISTERREQUEST
+
+    # @@protoc_insertion_point(class_scope:leap.common.events.UnregisterRequest)
+
+
+class EventResponse(_message.Message):
+    __metaclass__ = _reflection.GeneratedProtocolMessageType
+    DESCRIPTOR = _EVENTRESPONSE
+
+    # @@protoc_insertion_point(class_scope:leap.common.events.EventResponse)
+
+
+DESCRIPTOR.has_options = True
+DESCRIPTOR._options = _descriptor._ParseOptions(
+    descriptor_pb2.FileOptions(), '\220\001\001')
+
+_EVENTSSERVERSERVICE = _descriptor.ServiceDescriptor(
+    name='EventsServerService',
+    full_name='leap.common.events.EventsServerService',
+    file=DESCRIPTOR,
+    index=0,
+    options=None,
+    serialized_start=904,
+    serialized_end=1177,
+    methods=[
+        _descriptor.MethodDescriptor(
+            name='register',
+            full_name='leap.common.events.EventsServerService.register',
+            index=0,
+            containing_service=None,
+            input_type=_REGISTERREQUEST,
+            output_type=_EVENTRESPONSE,
+            options=None,
+        ),
+        _descriptor.MethodDescriptor(
+            name='unregister',
+            full_name='leap.common.events.EventsServerService.unregister',
+            index=1,
+            containing_service=None,
+            input_type=_UNREGISTERREQUEST,
+            output_type=_EVENTRESPONSE,
+            options=None,
+        ),
+        _descriptor.MethodDescriptor(
+            name='signal',
+            full_name='leap.common.events.EventsServerService.signal',
+            index=2,
+            containing_service=None,
+            input_type=_SIGNALREQUEST,
+            output_type=_EVENTRESPONSE,
+            options=None,
+        ),
+    ])
+
+
+class EventsServerService(_service.Service):
+    __metaclass__ = service_reflection.GeneratedServiceType
+    DESCRIPTOR = _EVENTSSERVERSERVICE
+
+
+class EventsServerService_Stub(EventsServerService):
+    __metaclass__ = service_reflection.GeneratedServiceStubType
+    DESCRIPTOR = _EVENTSSERVERSERVICE
+
+
+_EVENTSCOMPONENTSERVICE = _descriptor.ServiceDescriptor(
+    name='EventsComponentService',
+    full_name='leap.common.events.EventsComponentService',
+    file=DESCRIPTOR,
+    index=1,
+    options=None,
+    serialized_start=1179,
+    serialized_end=1283,
+    methods=[
+        _descriptor.MethodDescriptor(
+            name='signal',
+            full_name='leap.common.events.EventsComponentService.signal',
+            index=0,
+            containing_service=None,
+            input_type=_SIGNALREQUEST,
+            output_type=_EVENTRESPONSE,
+            options=None,
+        ),
+    ])
+
+
+class EventsComponentService(_service.Service):
+    __metaclass__ = service_reflection.GeneratedServiceType
+    DESCRIPTOR = _EVENTSCOMPONENTSERVICE
+
+
+class EventsComponentService_Stub(EventsComponentService):
+    __metaclass__ = service_reflection.GeneratedServiceStubType
+    DESCRIPTOR = _EVENTSCOMPONENTSERVICE
+
+# @@protoc_insertion_point(module_scope)
diff --git a/src/leap/common/events/mac_auth.py b/src/leap/common/events/mac_auth.py
new file mode 100644
index 0000000..49d48f7
--- /dev/null
+++ b/src/leap/common/events/mac_auth.py
@@ -0,0 +1,31 @@
+# -*- coding: utf-8 -*-
+# mac_auth.py
+# Copyright (C) 2013 LEAP
+#
+# 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 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 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/>.
+
+"""
+Authentication system for events.
+
+This is not implemented yet.
+"""
+
+
+class MacMethod(object):
+    """
+    Representation of possible MAC authentication methods.
+    """
+
+    MAC_NONE = 'none'
+    MAC_HMAC = 'hmac'
diff --git a/src/leap/common/events/server.py b/src/leap/common/events/server.py
new file mode 100644
index 0000000..d53c218
--- /dev/null
+++ b/src/leap/common/events/server.py
@@ -0,0 +1,176 @@
+# -*- coding: utf-8 -*-
+# server.py
+# Copyright (C) 2013 LEAP
+#
+# 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 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 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/>.
+"""
+A server for the events mechanism.
+
+A server can receive different kinds of requests from components:
+
+  1. Registration request: store component port number to be notified when
+     a specific signal arrives.
+
+  2. Signal request: redistribute the signal to registered components.
+"""
+import logging
+import socket
+
+
+from protobuf.socketrpc import RpcService
+from leap.common.events import (
+    events_pb2 as proto,
+    daemon,
+)
+
+
+logger = logging.getLogger(__name__)
+
+
+SERVER_PORT = 8090
+
+# the `registered_components` dictionary below should have the following
+# format:
+#
+#     { event_signal: [ port, ... ], ... }
+#
+registered_components = {}
+
+
+def ensure_server(port=SERVER_PORT):
+    """
+    Make sure the server is running on the given port.
+
+    Attempt to connect to given local port. Upon success, assume that the
+    events server has already been started. Upon failure, start events server.
+
+    :param port: the port in which server should be listening
+    :type port: int
+
+    :return: the daemon instance or nothing
+    :rtype: EventsServerDaemon or None
+    """
+    try:
+        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        s.connect(('localhost', port))
+        s.close()
+        logger.info('Server is already running on port %d.', port)
+        return None
+    except socket.error:
+        logger.info('Launching server on port %d.', port)
+        return EventsServerDaemon.ensure(port)
+
+
+class EventsServerService(proto.EventsServerService):
+    """
+    Service for receiving events in components.
+    """
+
+    def register(self, controller, request, done):
+        """
+        Register a component port to be signaled when specific events come in.
+
+        :param controller: used to mediate a single method call
+        :type controller: protobuf.socketrpc.controller.SocketRpcController
+        :param request: the request received from the component
+        :type request: leap.common.events.events_pb2.RegisterRequest
+        :param done: callback to be called when done
+        :type done: protobuf.socketrpc.server.Callback
+        """
+        logger.info("Received registration request: %s..." % str(request)[:40])
+        # add component port to signal list
+        if request.event not in registered_components:
+            registered_components[request.event] = set([])
+        registered_components[request.event].add(request.port)
+        # send response back to component
+
+        logger.debug('sending response back')
+        response = proto.EventResponse()
+        response.status = proto.EventResponse.OK
+        done.run(response)
+
+    def unregister(self, controller, request, done):
+        """
+        Unregister a component port so it will not be signaled when specific
+        events come in.
+
+        :param controller: used to mediate a single method call
+        :type controller: protobuf.socketrpc.controller.SocketRpcController
+        :param request: the request received from the component
+        :type request: leap.common.events.events_pb2.RegisterRequest
+        :param done: callback to be called when done
+        :type done: protobuf.socketrpc.server.Callback
+        """
+        logger.info(
+            "Received unregistration request: %s..." % str(request)[:40])
+        # remove component port from signal list
+        response = proto.EventResponse()
+        if request.event in registered_components:
+            try:
+                registered_components[request.event].remove(request.port)
+                response.status = proto.EventResponse.OK
+            except KeyError:
+                response.status = proto.EventsResponse.ERROR
+                response.result = 'Port %d not registered.' % request.port
+        # send response back to component
+        logger.debug('sending response back')
+        done.run(response)
+
+    def signal(self, controller, request, done):
+        """
+        Perform an RPC call to signal all components registered to receive a
+        specific signal.
+
+        :param controller: used to mediate a single method call
+        :type controller: protobuf.socketrpc.controller.SocketRpcController
+        :param request: the request received from the component
+        :type request: leap.common.events.events_pb2.SignalRequest
+        :param done: callback to be called when done
+        :type done: protobuf.socketrpc.server.Callback
+        """
+        logger.info('Received signal from component: %s...', str(request)[:40])
+        # send signal to all registered components
+        # TODO: verify signal auth
+        if request.event in registered_components:
+            for port in registered_components[request.event]:
+
+                def callback(req, resp):
+                    logger.info("Signal received by " + str(port))
+
+                service = RpcService(proto.EventsComponentService_Stub,
+                                     port, 'localhost')
+                service.signal(request, callback=callback)
+        # send response back to component
+        response = proto.EventResponse()
+        response.status = proto.EventResponse.OK
+        done.run(response)
+
+
+class EventsServerDaemon(daemon.EventsSingletonDaemon):
+    """
+    Singleton class for starting an events server daemon.
+    """
+
+    @classmethod
+    def ensure(cls, port):
+        """
+        Make sure the daemon is running on the given port.
+
+        :param port: the port in which the daemon should listen
+        :type port: int
+
+        :return: a daemon instance
+        :rtype: EventsServerDaemon
+        """
+        return cls.ensure_service(port, EventsServerService())
diff --git a/src/leap/common/events/service.py b/src/leap/common/events/service.py
deleted file mode 100644
index fda45b2..0000000
--- a/src/leap/common/events/service.py
+++ /dev/null
@@ -1,114 +0,0 @@
-# -*- coding: utf-8 -*-
-# service.py
-# Copyright (C) 2013 LEAP
-#
-# 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 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 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 logging
-import threading
-from protobuf.socketrpc.server import (
-    SocketRpcServer,
-    ThreadedTCPServer,
-    SocketHandler,
-)
-from leap.common.events import (
-    signal_pb2 as proto,
-    registered_callbacks,
-)
-
-
-logger = logging.getLogger(__name__)
-
-
-class SignalRpcServer(SocketRpcServer):
-
-    def __init__(self, port, host='localhost'):
-        '''port - Port this server is started on'''
-        self.port = port
-        self.host = host
-        self.serviceMap = {}
-        self.server = None
-
-    def run(self):
-        '''Activate the server.'''
-        logger.info('Running server on port %d' % self.port)
-        self.server = ThreadedTCPServer((self.host, self.port),
-                                        SocketHandler, self)
-        self.server.serve_forever()
-
-    def stop(self):
-        self.server.shutdown()
-
-
-class SignalService(proto.SignalService):
-    '''
-    Handles signaling for LEAP components.
-    '''
-
-    def signal(self, controller, request, done):
-        logger.info('Received signal.')
-
-        # Run registered callbacks
-        if registered_callbacks.has_key(request.signal):
-            for (_, cbk) in registered_callbacks[request.signal]:
-                cbk(request)
-
-        # Create response message
-        response = proto.SignalResponse()
-        # TODO: change id for something meaningful
-        response.id = 1
-        response.status = proto.SignalResponse.OK
-
-        # Call provided callback with response message
-        done.run(response)
-
-
-class SignalServiceThread(threading.Thread):
-    """
-    Singleton class for starting a server thread
-    """
-
-    # Singleton instance
-    _instance = None
-
-    def __init__(self, port):
-        super(SignalServiceThread, self).__init__()
-        self._service = SignalService()
-        self._port = port
-        self._server = SignalRpcServer(self._port)
-        self._server.registerService(self._service)
-        self.setDaemon(True)
-
-    @staticmethod
-    def start_service(port):
-        """
-        Start the singleton instance if not already running
-        Will not exit until the process ends
-        """
-        if SignalServiceThread._instance == None:
-            SignalServiceThread._instance = SignalServiceThread(port)
-            SignalServiceThread._instance.start()
-        elif port != SignalServiceThread._instance._port:
-            # TODO: make this exception more self-explanatory
-            raise Exception()
-        return SignalServiceThread._instance
-
-    def get_instance(self):
-        return self._instance
-
-    def run(self):
-        self._server.run()
-
-    def stop(self):
-        self._server.stop()
diff --git a/src/leap/common/events/signal.proto b/src/leap/common/events/signal.proto
deleted file mode 100644
index 336471c..0000000
--- a/src/leap/common/events/signal.proto
+++ /dev/null
@@ -1,57 +0,0 @@
-// signal.proto
-// Copyright (C) 2013 LEA
-//
-// 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 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 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/>.
-
-package leap.common.events;
-
-message SignalRequest {
-
-  enum Signal {
-    CLIENT_SESSION_ID = 1;
-    CLIENT_UID = 2;
-    SOLEDAD_CREATING_KEYS = 3;
-    SOLEDAD_DONE_CREATING_KEYS = 4;
-    SOLEDAD_UPLOADING_KEYS = 5;
-    SOLEDAD_DONE_UPLOADING_KEYS = 6;
-    SOLEDAD_DOWNLOADING_KEYS = 7;
-    SOLEDAD_DONE_DOWNLOADING_KEYS = 8;
-    SOLEDAD_NEW_DATA_TO_SYNC = 9;
-    SOLEDAD_DONE_DATA_SYNC = 10;
-  }
-
-  required int32 id = 1;
-  required Signal signal = 2;
-  required string content = 3;
-  required string mac_method = 4;
-  required bytes mac = 5;
-  optional string enc_method = 6;
-  optional bool error_occurred = 7;
-}
-
-message SignalResponse {
-
-  enum Status {
-    OK = 1;
-    UNAUTH = 2;
-    ERROR = 3;
-  }
-
-  required int32 id = 1;
-  required Status status = 2;
-}
-
-service SignalService {
-  rpc signal(SignalRequest) returns (SignalResponse);
-}
diff --git a/src/leap/common/events/signal_pb2.py b/src/leap/common/events/signal_pb2.py
deleted file mode 100644
index b21676f..0000000
--- a/src/leap/common/events/signal_pb2.py
+++ /dev/null
@@ -1,250 +0,0 @@
-# Generated by the protocol buffer compiler.  DO NOT EDIT!
-
-from google.protobuf import descriptor
-from google.protobuf import message
-from google.protobuf import reflection
-from google.protobuf import service
-from google.protobuf import service_reflection
-from google.protobuf import descriptor_pb2
-# @@protoc_insertion_point(imports)
-
-
-DESCRIPTOR = descriptor.FileDescriptor(
-  name='signal.proto',
-  package='leap.common.events',
-  serialized_pb='\n\x0csignal.proto\x12\x12leap.common.events\"\xd8\x03\n\rSignalRequest\x12\n\n\x02id\x18\x01 \x02(\x05\x12\x38\n\x06signal\x18\x02 \x02(\x0e\x32(.leap.common.events.SignalRequest.Signal\x12\x0f\n\x07\x63ontent\x18\x03 \x02(\t\x12\x12\n\nmac_method\x18\x04 \x02(\t\x12\x0b\n\x03mac\x18\x05 \x02(\x0c\x12\x12\n\nenc_method\x18\x06 \x01(\t\x12\x16\n\x0e\x65rror_occurred\x18\x07 \x01(\x08\"\xa2\x02\n\x06Signal\x12\x15\n\x11\x43LIENT_SESSION_ID\x10\x01\x12\x0e\n\nCLIENT_UID\x10\x02\x12\x19\n\x15SOLEDAD_CREATING_KEYS\x10\x03\x12\x1e\n\x1aSOLEDAD_DONE_CREATING_KEYS\x10\x04\x12\x1a\n\x16SOLEDAD_UPLOADING_KEYS\x10\x05\x12\x1f\n\x1bSOLEDAD_DONE_UPLOADING_KEYS\x10\x06\x12\x1c\n\x18SOLEDAD_DOWNLOADING_KEYS\x10\x07\x12!\n\x1dSOLEDAD_DONE_DOWNLOADING_KEYS\x10\x08\x12\x1c\n\x18SOLEDAD_NEW_DATA_TO_SYNC\x10\t\x12\x1a\n\x16SOLEDAD_DONE_DATA_SYNC\x10\n\"\x80\x01\n\x0eSignalResponse\x12\n\n\x02id\x18\x01 \x02(\x05\x12\x39\n\x06status\x18\x02 \x02(\x0e\x32).leap.common.events.SignalResponse.Status\"\'\n\x06Status\x12\x06\n\x02OK\x10\x01\x12\n\n\x06UNAUTH\x10\x02\x12\t\n\x05\x45RROR\x10\x03\x32`\n\rSignalService\x12O\n\x06signal\x12!.leap.common.events.SignalRequest\x1a\".leap.common.events.SignalResponse')
-
-
-
-_SIGNALREQUEST_SIGNAL = descriptor.EnumDescriptor(
-  name='Signal',
-  full_name='leap.common.events.SignalRequest.Signal',
-  filename=None,
-  file=DESCRIPTOR,
-  values=[
-    descriptor.EnumValueDescriptor(
-      name='CLIENT_SESSION_ID', index=0, number=1,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='CLIENT_UID', index=1, number=2,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_CREATING_KEYS', index=2, number=3,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_DONE_CREATING_KEYS', index=3, number=4,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_UPLOADING_KEYS', index=4, number=5,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_DONE_UPLOADING_KEYS', index=5, number=6,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_DOWNLOADING_KEYS', index=6, number=7,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_DONE_DOWNLOADING_KEYS', index=7, number=8,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_NEW_DATA_TO_SYNC', index=8, number=9,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='SOLEDAD_DONE_DATA_SYNC', index=9, number=10,
-      options=None,
-      type=None),
-  ],
-  containing_type=None,
-  options=None,
-  serialized_start=219,
-  serialized_end=509,
-)
-
-_SIGNALRESPONSE_STATUS = descriptor.EnumDescriptor(
-  name='Status',
-  full_name='leap.common.events.SignalResponse.Status',
-  filename=None,
-  file=DESCRIPTOR,
-  values=[
-    descriptor.EnumValueDescriptor(
-      name='OK', index=0, number=1,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='UNAUTH', index=1, number=2,
-      options=None,
-      type=None),
-    descriptor.EnumValueDescriptor(
-      name='ERROR', index=2, number=3,
-      options=None,
-      type=None),
-  ],
-  containing_type=None,
-  options=None,
-  serialized_start=601,
-  serialized_end=640,
-)
-
-
-_SIGNALREQUEST = descriptor.Descriptor(
-  name='SignalRequest',
-  full_name='leap.common.events.SignalRequest',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    descriptor.FieldDescriptor(
-      name='id', full_name='leap.common.events.SignalRequest.id', index=0,
-      number=1, type=5, cpp_type=1, label=2,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='signal', full_name='leap.common.events.SignalRequest.signal', index=1,
-      number=2, type=14, cpp_type=8, label=2,
-      has_default_value=False, default_value=1,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='content', full_name='leap.common.events.SignalRequest.content', index=2,
-      number=3, type=9, cpp_type=9, label=2,
-      has_default_value=False, default_value=unicode("", "utf-8"),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='mac_method', full_name='leap.common.events.SignalRequest.mac_method', index=3,
-      number=4, type=9, cpp_type=9, label=2,
-      has_default_value=False, default_value=unicode("", "utf-8"),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='mac', full_name='leap.common.events.SignalRequest.mac', index=4,
-      number=5, type=12, cpp_type=9, label=2,
-      has_default_value=False, default_value="",
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='enc_method', full_name='leap.common.events.SignalRequest.enc_method', index=5,
-      number=6, type=9, cpp_type=9, label=1,
-      has_default_value=False, default_value=unicode("", "utf-8"),
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='error_occurred', full_name='leap.common.events.SignalRequest.error_occurred', index=6,
-      number=7, type=8, cpp_type=7, label=1,
-      has_default_value=False, default_value=False,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-    _SIGNALREQUEST_SIGNAL,
-  ],
-  options=None,
-  is_extendable=False,
-  extension_ranges=[],
-  serialized_start=37,
-  serialized_end=509,
-)
-
-
-_SIGNALRESPONSE = descriptor.Descriptor(
-  name='SignalResponse',
-  full_name='leap.common.events.SignalResponse',
-  filename=None,
-  file=DESCRIPTOR,
-  containing_type=None,
-  fields=[
-    descriptor.FieldDescriptor(
-      name='id', full_name='leap.common.events.SignalResponse.id', index=0,
-      number=1, type=5, cpp_type=1, label=2,
-      has_default_value=False, default_value=0,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-    descriptor.FieldDescriptor(
-      name='status', full_name='leap.common.events.SignalResponse.status', index=1,
-      number=2, type=14, cpp_type=8, label=2,
-      has_default_value=False, default_value=1,
-      message_type=None, enum_type=None, containing_type=None,
-      is_extension=False, extension_scope=None,
-      options=None),
-  ],
-  extensions=[
-  ],
-  nested_types=[],
-  enum_types=[
-    _SIGNALRESPONSE_STATUS,
-  ],
-  options=None,
-  is_extendable=False,
-  extension_ranges=[],
-  serialized_start=512,
-  serialized_end=640,
-)
-
-
-_SIGNALREQUEST.fields_by_name['signal'].enum_type = _SIGNALREQUEST_SIGNAL
-_SIGNALREQUEST_SIGNAL.containing_type = _SIGNALREQUEST;
-_SIGNALRESPONSE.fields_by_name['status'].enum_type = _SIGNALRESPONSE_STATUS
-_SIGNALRESPONSE_STATUS.containing_type = _SIGNALRESPONSE;
-
-class SignalRequest(message.Message):
-  __metaclass__ = reflection.GeneratedProtocolMessageType
-  DESCRIPTOR = _SIGNALREQUEST
-  
-  # @@protoc_insertion_point(class_scope:leap.common.events.SignalRequest)
-
-class SignalResponse(message.Message):
-  __metaclass__ = reflection.GeneratedProtocolMessageType
-  DESCRIPTOR = _SIGNALRESPONSE
-  
-  # @@protoc_insertion_point(class_scope:leap.common.events.SignalResponse)
-
-
-_SIGNALSERVICE = descriptor.ServiceDescriptor(
-  name='SignalService',
-  full_name='leap.common.events.SignalService',
-  file=DESCRIPTOR,
-  index=0,
-  options=None,
-  serialized_start=642,
-  serialized_end=738,
-  methods=[
-  descriptor.MethodDescriptor(
-    name='signal',
-    full_name='leap.common.events.SignalService.signal',
-    index=0,
-    containing_service=None,
-    input_type=_SIGNALREQUEST,
-    output_type=_SIGNALRESPONSE,
-    options=None,
-  ),
-])
-
-class SignalService(service.Service):
-  __metaclass__ = service_reflection.GeneratedServiceType
-  DESCRIPTOR = _SIGNALSERVICE
-class SignalService_Stub(SignalService):
-  __metaclass__ = service_reflection.GeneratedServiceStubType
-  DESCRIPTOR = _SIGNALSERVICE
-
-# @@protoc_insertion_point(module_scope)
diff --git a/src/leap/common/events/test_events.py b/src/leap/common/events/test_events.py
deleted file mode 100644
index ae55319..0000000
--- a/src/leap/common/events/test_events.py
+++ /dev/null
@@ -1,88 +0,0 @@
-import unittest
-from protobuf.socketrpc import RpcService
-from leap.common import events
-from leap.common.events import service
-from leap.common.events.signal_pb2 import (
-    SignalRequest,
-    SignalService,
-    SignalService_Stub,
-)
-
-
-port = 8090
-
-class EventsTestCase(unittest.TestCase):
-
-    def _start_service(self):
-        return service.SignalServiceThread.start_service(port)
-
-    def setUp(self):
-        super(EventsTestCase, self).setUp()
-        self._service = self._start_service()
-
-    def tearDown(self):
-        events.registered_callbacks = {}
-        super(EventsTestCase, self).tearDown()
-
-    def test_service_singleton(self):
-        self.assertTrue(self._service.get_instance() == self._service,
-                        "Can't get singleton class for service.")
-
-    def test_register_signal(self):
-        key = SignalRequest.SOLEDAD_CREATING_KEYS
-        self.assertEqual({}, events.registered_callbacks,
-                        'There should be no registered_callbacks events when '
-                        'service has just started.')
-        events.register(key, lambda x: True)
-        self.assertEqual(1, len(events.registered_callbacks),
-                         'Wrong number of registered callbacks.')
-        self.assertEqual(events.registered_callbacks.keys(), [key],
-                         'Couldn\'t locate registered signal.')
-        events.register(key, lambda x: True)
-        self.assertEqual(1, len(events.registered_callbacks),
-                         'Wrong number of registered callbacks.')
-        self.assertEqual(events.registered_callbacks.keys(), [key],
-                         'Couldn\'t locate registered signal.')
-        self.assertEqual(
-            2,
-            len(events.registered_callbacks[SignalRequest.SOLEDAD_CREATING_KEYS]),
-            'Wrong number of registered callbacks.')
-        key2 = SignalRequest.CLIENT_UID
-        events.register(key2, lambda x: True)
-        self.assertEqual(2, len(events.registered_callbacks),
-                         'Wrong number of registered callbacks.')
-        self.assertEqual(
-            sorted(events.registered_callbacks.keys()),
-            sorted([key2, key]),
-            'Wrong keys in `registered_keys`.')
-
-    def test_register_signal_replace(self):
-        key = SignalRequest.SOLEDAD_CREATING_KEYS
-        cbk = lambda x: True
-        self.assertEqual({}, events.registered_callbacks,
-                        'There should be no registered_callbacks events when '
-                        'service has just started.')
-        events.register(key, cbk, uid=1)
-        self.assertRaises(Exception, events.register, key, lambda x: True, uid=1)
-        self.assertEquals(1,
-                          events.register(key, lambda x: True, uid=1, replace=True),
-                          "Could not replace callback.")
-        self.assertEqual(1, len(events.registered_callbacks),
-                         'Wrong number of registered callbacks.')
-        self.assertEqual(events.registered_callbacks.keys(), [key],
-                         'Couldn\'t locate registered signal.')
-
-    def test_signal_response_status(self):
-        sig = SignalRequest.SOLEDAD_CREATING_KEYS
-        cbk = lambda x: True
-        events.register(sig, cbk)
-        request = SignalRequest()
-        request.id = 1
-        request.signal = sig
-        request.content = 'my signal contents'
-        request.mac_method = 'nomac'
-        request.mac = ""
-        service = RpcService(SignalService_Stub, port, 'localhost')
-        response = service.signal(request, timeout=1000)
-        self.assertEqual(response.OK, response.status,
-                         'Wrong response status.')