- helper functions and event generator for gre tunnel - plug events for gre tunnel app
Signed-off-by: Isaku Yamahata <[email protected]> --- ryu/controller/tunnels.py | 196 +++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 196 insertions(+), 0 deletions(-) create mode 100644 ryu/controller/tunnels.py diff --git a/ryu/controller/tunnels.py b/ryu/controller/tunnels.py new file mode 100644 index 0000000..d96b81d --- /dev/null +++ b/ryu/controller/tunnels.py @@ -0,0 +1,196 @@ +# Copyright (C) 2012 Nippon Telegraph and Telephone Corporation. +# Copyright (C) 2012 Isaku Yamahata <yamahata at valinux co jp> +# +# 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, version 3 of the License +# +# 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 collections +import logging + +import ryu.exception as ryu_exc +from ryu.controller import event +from ryu.controller import dispatcher + + +LOG = logging.getLogger(__name__) + + +QUEUE_NAME_TUNNEL_EV = 'tunnel_event' +DISPATCHER_NAME_TUNNEL_EV = 'tunnel_event_handler' +TUNNEL_EV_DISPATCHER = dispatcher.EventDispatcher(DISPATCHER_NAME_TUNNEL_EV) + + +class EventTunnelKeyBase(event.EventBase): + def __init__(self, network_id, tunnel_key): + super(EventTunnelKeyBase, self).__init__() + self.network_id = network_id + self.tunnel_key = tunnel_key + + +class EventTunnelKeyAdd(EventTunnelKeyBase): + def __init__(self, network_id, tunnel_key): + super(EventTunnelKeyAdd, self).__init__(network_id, tunnel_key) + + +class EventTunnelKeyDel(EventTunnelKeyBase): + def __init__(self, network_id, tunnel_key): + super(EventTunnelKeyDel, self).__init__(network_id, tunnel_key) + + +class EventTunnelPort(event.EventBase): + def __init__(self, dpid, port_no, remote_dpid, add_del): + super(EventTunnelPort, self).__init__() + self.dpid = dpid + self.port_no = port_no + self.remote_dpid = remote_dpid + self.add_del = add_del + + +class TunnelKeys(dict): + """network id(uuid) <-> tunnel key(32bit unsigned int)""" + def __init__(self, ev_q): + super(TunnelKeys, self).__init__() + self.ev_q = ev_q + + def get_key(self, network_id): + try: + return self[network_id] + except KeyError: + raise ryu_exc.TunnelKeyNotFound(network_id=network_id) + + def _set_key(self, network_id, tunnel_key): + self[network_id] = tunnel_key + self.ev_q.queue(EventTunnelKeyAdd(network_id, tunnel_key)) + + def register_key(self, network_id, tunnel_key): + if network_id in self: + raise ryu_exc.NetworkAlreadyExist(network_id=network_id) + if tunnel_key in self.values(): + raise ryu_exc.TunnelKeyAlreadyExist(tunnel_key=tunnel_key) + self._set_key(network_id, tunnel_key) + + def update_key(self, network_id, tunnel_key): + if network_id not in self and tunnel_key in self.values(): + raise ryu_exc.TunnelKeyAlreadyExist(key=tunnel_key) + + key = self.get(network_id) + if key is None: + self._set_key(network_id, tunnel_key) + return + if key != tunnel_key: + raise ryu_exc.NetworkAlreadyExist(network_id=network_id) + + def delete_key(self, network_id): + try: + tunnel_key = self[network_id] + self.ev_q.queue(EventTunnelKeyDel(network_id, tunnel_key)) + del self[network_id] + except KeyError: + raise ryu_exc.NetworkNotFound(network_id=network_id) + + +class DPIDs(object): + """dpid -> port_no -> remote_dpid""" + def __init__(self, ev_q): + super(DPIDs, self).__init__() + self.dpids = collections.defaultdict(dict) + self.ev_q = ev_q + + def list_ports(self, dpid): + return self.dpids[dpid] + + def _add_remote_dpid(self, dpid, port_no, remote_dpid): + self.dpids[dpid][port_no] = remote_dpid + self.ev_q.queue(EventTunnelPort(dpid, port_no, remote_dpid, True)) + + def add_remote_dpid(self, dpid, port_no, remote_dpid): + if port_no in self.dpids[dpid]: + raise ryu_exc.PortAlreadyExist(dpid=dpid, port=port_no, + network_id=None) + self._add_remote_dpid(dpid, port_no, remote_dpid) + + def update_remote_dpid(self, dpid, port_no, remote_dpid): + remote_dpid_ = self.dpids[dpid].get(port_no) + if remote_dpid_ is None: + self._add_remote_dpid(dpid, port_no, remote_dpid) + elif remote_dpid_ != remote_dpid: + raise ryu_exc.RemoteDPIDAlreadyExist(dpid=dpid, port=port_no, + remote_dpid=remote_dpid) + + def get_remote_dpid(self, dpid, port_no): + try: + return self.dpids[dpid][port_no] + except KeyError: + raise ryu_exc.PortNotFound(dpid=dpid, port=port_no) + + def delete_port(self, dpid, port_no): + try: + remote_dpid = self.dpids[dpid][port_no] + self.ev_q.queue(EventTunnelPort(dpid, port_no, remote_dpid, False)) + del self.dpids[dpid][port_no] + except KeyError: + raise ryu_exc.PortNotFound(dpid=dpid, port=port_no) + + def get_port(self, dpid, remote_dpid): + try: + dp = self.dpids[dpid] + except KeyError: + raise ryu_exc.PortNotFound(dpid=dpid, port=None, network_id=None) + + res = [port_no for (port_no, remote_dpid_) in dp.items() + if remote_dpid_ == remote_dpid] + assert len(res) <= 1 + if len(res) == 0: + raise ryu_exc.PortNotFound(dpid=dpid, port=None, network_id=None) + return res[0] + + +class Tunnels(object): + def __init__(self): + super(Tunnels, self).__init__() + ev_q = dispatcher.EventQueue(QUEUE_NAME_TUNNEL_EV, + TUNNEL_EV_DISPATCHER) + self.tunnel_keys = TunnelKeys(ev_q) + self.dpids = DPIDs(ev_q) + + def get_key(self, network_id): + return self.tunnel_keys.get_key(network_id) + + def register_key(self, network_id, tunnel_key): + self.tunnel_keys.register_key(network_id, tunnel_key) + + def update_key(self, network_id, tunnel_key): + self.tunnel_keys.update_key(network_id, tunnel_key) + + def delete_key(self, network_id): + self.tunnel_keys.delete_key(network_id) + + def list_ports(self, dpid): + return self.dpids.list_ports(dpid).keys() + + def register_port(self, dpid, port_no, remote_dpid): + self.dpids.add_remote_dpid(dpid, port_no, remote_dpid) + + def update_port(self, dpid, port_no, remote_dpid): + self.dpids.update_remote_dpid(dpid, port_no, remote_dpid) + + def get_remote_dpid(self, dpid, port_no): + return self.dpids.get_remote_dpid(dpid, port_no) + + def delete_port(self, dpid, port_no): + self.dpids.delete_port(dpid, port_no) + + # + # methods for gre tunnel + # + def get_port(self, dpid, remote_dpid): + return self.dpids.get_port(dpid, remote_dpid) -- 1.7.1.1 ------------------------------------------------------------------------------ Better than sec? 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