""" This module defines handlers for storing sessions when handles sessions of users connecting to the server. There are two similar but separate stores of sessions: ServerSessionHandler - this stores generic game sessions for the game. These sessions has no knowledge about how they are connected to the world. PortalSessionHandler - this stores sessions created by twisted protocols. These are dumb connectors that handle network communication but holds no game info. """ import time from django.conf import settings from django.contrib.auth.models import User from src.server.models import ServerConfig from src.utils import utils from src.commands.cmdhandler import CMD_LOGINSTART # AMP signals PCONN = chr(1) # portal session connect PDISCONN = chr(2) # portal session disconnect PSYNC = chr(3) # portal session sync SLOGIN = chr(4) # server session login SDISCONN = chr(5) # server session disconnect SDISCONNALL = chr(6) # server session disconnect all SSHUTD = chr(7) # server shutdown SSYNC = chr(8) # server session sync # i18n from django.utils.translation import ugettext as _ ALLOW_MULTISESSION = settings.ALLOW_MULTISESSION IDLE_TIMEOUT = settings.IDLE_TIMEOUT class SessionHandler(object): """ This handler holds a stack of sessions. """ def __init__(self): """ Init the handler. """ self.sessions = {} def get_sessions(self, include_unloggedin=False): """ Returns the connected session objects. """ if include_unloggedin: return self.sessions.values() else: return [session for session in self.sessions.values() if session.logged_in] def get_session(self, sessid): """ Get session by sessid """ return self.sessions.get(sessid, None) def get_all_sync_data(self): """ Create a dictionary of sessdata dicts representing all sessions in store. """ sessdict = {} for sess in self.sessions.values(): # copy all relevant data from all sessions sessdict[sess.sessid] = sess.get_sync_data() return sessdict #------------------------------------------------------------ # Server-SessionHandler class #------------------------------------------------------------ class ServerSessionHandler(SessionHandler): """ This object holds the stack of sessions active in the game at any time. A session register with the handler in two steps, first by registering itself with the connect() method. This indicates an non-authenticated session. Whenever the session is authenticated the session together with the related player is sent to the login() method. """ # AMP communication methods def __init__(self): """ Init the handler. """ self.sessions = {} self.server = None self.server_data = {"servername":settings.SERVERNAME} def portal_connect(self, sessid, session): """ Called by Portal when a new session has connected. Creates a new, unlogged-in game session. """ self.sessions[sessid] = session session.execute_cmd(CMD_LOGINSTART) def portal_disconnect(self, sessid): """ Called by Portal when portal reports a closing of a session from the portal side. """ session = self.sessions.get(sessid, None) if session: del self.sessions[session.sessid] self.session_count(-1) def portal_session_sync(self, sesslist): """ Syncing all session ids of the portal with the ones of the server. This is instantiated by the portal when reconnecting. sesslist is a complete list of (sessid, session) pairs, matching the list on the portal. if session was logged in, the amp handler will have logged them in before this point. """ for sess in self.sessions.values(): # we delete the old session to make sure to catch eventual lingering references. del sess for sess in sesslist: self.sessions[sess.sessid] = sess sess.at_sync() def portal_shutdown(self): """ Called by server when shutting down the portal. """ self.server.amp_protocol.call_remote_PortalAdmin(0, operation=SSHUTD, data="") # server-side access methods def disconnect(self, session, reason=""): """ Called from server side to remove session and inform portal of this fact. """ session = self.sessions.get(session.sessid, None) if session: sessid = session.sessid del self.sessions[sessid] # inform portal that session should be closed. self.server.amp_protocol.call_remote_PortalAdmin(sessid, operation=SDISCONN, data=reason) self.session_count(-1) def login(self, session): """ Log in the previously unloggedin session and the player we by now should know is connected to it. After this point we assume the session to be logged in one way or another. """ # prep the session with player/user info if not ALLOW_MULTISESSION: # disconnect previous sessions. self.disconnect_duplicate_sessions(session) session.logged_in = True self.session_count(1) # sync the portal to this session sessdata = session.get_sync_data() self.server.amp_protocol.call_remote_PortalAdmin(session.sessid, operation=SLOGIN, data=sessdata) def session_sync(self): """ This is called by the server when it reboots. It syncs all session data to the portal. """ sessdata = self.get_all_sync_data() self.server.amp_protocol.call_remote_PortalAdmin(0, SSYNC, data=sessdata) def disconnect_all_sessions(self, reason=_("You have been disconnected.")): """ Cleanly disconnect all of the connected sessions. """ for session in self.sessions: del session self.session_count(0) # tell portal to disconnect all sessions self.server.amp_protocol.call_remote_PortalAdmin(0, operation=SDISCONNALL, data=reason) def disconnect_duplicate_sessions(self, curr_session, reason = _("Logged in from elsewhere. Disconnecting.") ): """ Disconnects any existing sessions with the same game object. """ curr_char = curr_session.get_character() doublet_sessions = [sess for sess in self.sessions if sess.logged_in and sess.get_character() == curr_char and sess != curr_session] for sessid in doublet_sessions: self.disconnect(session, reason) self.session_count(-1) def validate_sessions(self): """ Check all currently connected sessions (logged in and not) and see if any are dead. """ tcurr = time.time() reason= _("Idle timeout exceeded, disconnecting.") for session in (session for session in self.sessions.values() if session.logged_in and IDLE_TIMEOUT > 0 and (tcurr - session.cmd_last) > IDLE_TIMEOUT): self.disconnect(session, reason=reason) self.session_count(-1) def session_count(self, num=None): """ Count up/down the number of connected, authenticated users. If num is None, the current number of sessions is returned. num can be a positive or negative value to be added to the current count. If 0, the counter will be reset to 0. """ if num == None: # show the current value. This also syncs it. return int(ServerConfig.objects.conf('nr_sessions', default=0)) elif num == 0: # reset value to 0 ServerConfig.objects.conf('nr_sessions', 0) else: # add/remove session count from value add = int(ServerConfig.objects.conf('nr_sessions', default=0)) num = max(0, num + add) ServerConfig.objects.conf('nr_sessions', str(num)) def player_count(self): """ Get the number of connected players (not sessions since a player may have more than one session connected if ALLOW_MULTISESSION is True) Only logged-in players are counted here. """ return len(set(session.uid for session in self.sessions.values() if session.logged_in)) def sessions_from_player(self, player): """ Given a player, return any matching sessions. """ username = player.user.username try: uobj = User.objects.get(username=username) except User.DoesNotExist: return None uid = uobj.id return [session for session in self.sessions.values() if session.logged_in and session.uid == uid] def sessions_from_character(self, character): """ Given a game character, return any matching sessions. """ player = character.player if player: return self.sessions_from_player(player) return None def announce_all(self, message): """ Send message to all connected sessions """ for sess in self.sessions.values(): self.data_out(sess, message) def data_out(self, session, string="", data=""): """ Sending data Server -> Portal """ self.server.amp_protocol.call_remote_MsgServer2Portal(sessid=session.sessid, msg=string, data=data) def data_in(self, sessid, string="", data=""): """ Data Portal -> Server """ session = self.sessions.get(sessid, None) if session: session.execute_cmd(string) # ignore 'data' argument for now; this is otherwise the place # to put custom effects on the server due to data input, e.g. # from a custom client. def oob_data_in(self, sessid, data): """ OOB (Out-of-band) Data Portal -> Server """ session = self.sessions.get(sessid, None) if session: session.oob_data_in(data) def oob_data_out(self, session, data): """ OOB (Out-of-band) Data Server -> Portal """ self.server.amp_protocol.call_remote_OOBServer2Portal(session.sessid, data=data) #------------------------------------------------------------ # Portal-SessionHandler class #------------------------------------------------------------ class PortalSessionHandler(SessionHandler): """ This object holds the sessions connected to the portal at any time. It is synced with the server's equivalent SessionHandler over the AMP connection. Sessions register with the handler using the connect() method. This will assign a new unique sessionid to the session and send that sessid to the server using the AMP connection. """ def __init__(self): """ Init the handler """ self.portal = None self.sessions = {} self.latest_sessid = 0 self.uptime = time.time() self.connection_time = 0 def at_server_connection(self): """ Called when the Portal establishes connection with the Server. At this point, the AMP connection is already established. """ self.connection_time = time.time() def connect(self, session): """ Called by protocol at first connect. This adds a not-yet authenticated session using an ever-increasing counter for sessid. """ self.latest_sessid += 1 sessid = self.latest_sessid session.sessid = sessid sessdata = session.get_sync_data() self.sessions[sessid] = session # sync with server-side self.portal.amp_protocol.call_remote_ServerAdmin(sessid, operation=PCONN, data=sessdata) def disconnect(self, session): """ Called from portal side when the connection is closed from the portal side. """ sessid = session.sessid self.portal.amp_protocol.call_remote_ServerAdmin(sessid, operation=PDISCONN) def server_disconnect(self, sessid, reason=""): """ Called by server to force a disconnect by sessid """ session = self.sessions.get(sessid, None) if session: session.disconnect(reason) del session def server_disconnect_all(self, reason=""): """ Called by server when forcing a clean disconnect for everyone. """ for session in self.sessions.values(): session.disconnect(reason) del session def count_loggedin(self, include_unloggedin=False): """ Count loggedin connections, alternatively count all connections. """ return len(self.get_sessions(include_unloggedin=include_unloggedin)) def session_from_suid(self, suid): """ Given a session id, retrieve the session (this is primarily intended to be called by web clients) """ return [sess for sess in self.get_sessions(include_unloggedin=True) if hasattr(sess, 'suid') and sess.suid == suid] def data_in(self, session, string="", data=""): """ Called by portal sessions for relaying data coming in from the protocol to the server. data is serialized before passed on. """ self.portal.amp_protocol.call_remote_MsgPortal2Server(session.sessid, msg=string, data=data) def announce_all(self, message): """ Send message to all connection sessions """ for session in self.sessions.values(): session.data_out(message) def data_out(self, sessid, string="", data=""): """ Called by server for having the portal relay messages and data to the correct session protocol. """ session = self.sessions.get(sessid, None) if session: session.data_out(string, data=data) def oob_data_in(self, session, data): """ OOB (Out-of-band) data Portal -> Server """ self.portal.amp_protocol.call_remote_OOBPortal2Server(session.sessid, data=data) def oob_data_out(self, sessid, data): """ OOB (Out-of-band) data Server -> Portal """ session = self.sessions.get(sessid, None) if session: session.oob_data_out(data) SESSIONS = ServerSessionHandler() PORTAL_SESSIONS = PortalSessionHandler()