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[vsorcdistro/.git] / ryu / build / lib.linux-armv7l-2.7 / ryu / app / ws_topology.py

diff --git a/ryu/build/lib.linux-armv7l-2.7/ryu/app/ws_topology.py b/ryu/build/lib.linux-armv7l-2.7/ryu/app/ws_topology.py
new file mode 100644 (file)
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+++ b/ryu/build/lib.linux-armv7l-2.7/ryu/app/ws_topology.py
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+# Copyright (C) 2014 Stratosphere Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Usage example
+
+1. Run this application:
+$ ryu-manager --verbose --observe-links ryu.app.ws_topology
+
+2. Connect to this application by WebSocket (use your favorite client):
+$ wscat -c ws://localhost:8080/v1.0/topology/ws
+
+3. Join switches (use your favorite method):
+$ sudo mn --controller=remote --topo linear,2
+
+4. Topology change is notified:
+< {"params": [{"ports": [{"hw_addr": "56:c7:08:12:bb:36", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, {"hw_addr": "de:b9:49:24:74:3f", "name": "s1-eth2", "port_no": "00000002", "dpid": "0000000000000001"}], "dpid": "0000000000000001"}], "jsonrpc": "2.0", "method": "event_switch_enter", "id": 1}
+> {"id": 1, "jsonrpc": "2.0", "result": ""}
+
+< {"params": [{"ports": [{"hw_addr": "56:c7:08:12:bb:36", "name": "s1-eth1", "port_no": "00000001", "dpid": "0000000000000001"}, {"hw_addr": "de:b9:49:24:74:3f", "name": "s1-eth2", "port_no": "00000002", "dpid": "0000000000000001"}], "dpid": "0000000000000001"}], "jsonrpc": "2.0", "method": "event_switch_leave", "id": 2}
+> {"id": 2, "jsonrpc": "2.0", "result": ""}
+...
+"""  # noqa
+
+from socket import error as SocketError
+from tinyrpc.exc import InvalidReplyError
+
+
+from ryu.app.wsgi import (
+    ControllerBase,
+    WSGIApplication,
+    websocket,
+    WebSocketRPCClient
+)
+from ryu.base import app_manager
+from ryu.topology import event, switches
+from ryu.controller.handler import set_ev_cls
+
+
+class WebSocketTopology(app_manager.RyuApp):
+    _CONTEXTS = {
+        'wsgi': WSGIApplication,
+        'switches': switches.Switches,
+    }
+
+    def __init__(self, *args, **kwargs):
+        super(WebSocketTopology, self).__init__(*args, **kwargs)
+
+        self.rpc_clients = []
+
+        wsgi = kwargs['wsgi']
+        wsgi.register(WebSocketTopologyController, {'app': self})
+
+    @set_ev_cls(event.EventSwitchEnter)
+    def _event_switch_enter_handler(self, ev):
+        msg = ev.switch.to_dict()
+        self._rpc_broadcall('event_switch_enter', msg)
+
+    @set_ev_cls(event.EventSwitchLeave)
+    def _event_switch_leave_handler(self, ev):
+        msg = ev.switch.to_dict()
+        self._rpc_broadcall('event_switch_leave', msg)
+
+    @set_ev_cls(event.EventLinkAdd)
+    def _event_link_add_handler(self, ev):
+        msg = ev.link.to_dict()
+        self._rpc_broadcall('event_link_add', msg)
+
+    @set_ev_cls(event.EventLinkDelete)
+    def _event_link_delete_handler(self, ev):
+        msg = ev.link.to_dict()
+        self._rpc_broadcall('event_link_delete', msg)
+
+    @set_ev_cls(event.EventHostAdd)
+    def _event_host_add_handler(self, ev):
+        msg = ev.host.to_dict()
+        self._rpc_broadcall('event_host_add', msg)
+
+    def _rpc_broadcall(self, func_name, msg):
+        disconnected_clients = []
+        for rpc_client in self.rpc_clients:
+            # NOTE: Although broadcasting is desired,
+            #       RPCClient#get_proxy(one_way=True) does not work well
+            rpc_server = rpc_client.get_proxy()
+            try:
+                getattr(rpc_server, func_name)(msg)
+            except SocketError:
+                self.logger.debug('WebSocket disconnected: %s', rpc_client.ws)
+                disconnected_clients.append(rpc_client)
+            except InvalidReplyError as e:
+                self.logger.error(e)
+
+        for client in disconnected_clients:
+            self.rpc_clients.remove(client)
+
+
+class WebSocketTopologyController(ControllerBase):
+
+    def __init__(self, req, link, data, **config):
+        super(WebSocketTopologyController, self).__init__(
+            req, link, data, **config)
+        self.app = data['app']
+
+    @websocket('topology', '/v1.0/topology/ws')
+    def _websocket_handler(self, ws):
+        rpc_client = WebSocketRPCClient(ws)
+        self.app.rpc_clients.append(rpc_client)
+        rpc_client.serve_forever()