|
1
|
|
|
""" |
|
2
|
|
|
Internal server implementing opcu-ua interface. can be used on server side or to implement binary/https opc-ua servers |
|
3
|
|
|
""" |
|
4
|
|
|
|
|
5
|
1 |
|
from datetime import datetime |
|
6
|
1 |
|
from copy import copy, deepcopy |
|
7
|
1 |
|
from datetime import timedelta |
|
8
|
1 |
|
import logging |
|
9
|
1 |
|
from threading import Lock |
|
10
|
1 |
|
from enum import Enum |
|
11
|
1 |
|
try: |
|
12
|
1 |
|
from urllib.parse import urlparse |
|
13
|
|
|
except ImportError: |
|
14
|
|
|
from urlparse import urlparse |
|
15
|
|
|
|
|
16
|
|
|
|
|
17
|
1 |
|
from opcua import ua |
|
18
|
1 |
|
from opcua.common import utils |
|
19
|
1 |
|
from opcua.common.node import Node |
|
20
|
1 |
|
from opcua.server.history import HistoryManager |
|
21
|
1 |
|
from opcua.server.address_space import AddressSpace |
|
22
|
1 |
|
from opcua.server.address_space import AttributeService |
|
23
|
1 |
|
from opcua.server.address_space import ViewService |
|
24
|
1 |
|
from opcua.server.address_space import NodeManagementService |
|
25
|
1 |
|
from opcua.server.address_space import MethodService |
|
26
|
1 |
|
from opcua.server.subscription_service import SubscriptionService |
|
27
|
1 |
|
from opcua.server.standard_address_space import standard_address_space |
|
28
|
1 |
|
from opcua.server.users import User |
|
29
|
1 |
|
from opcua.common import xmlimporter |
|
30
|
|
|
|
|
31
|
|
|
|
|
32
|
1 |
|
class SessionState(Enum): |
|
33
|
1 |
|
Created = 0 |
|
34
|
1 |
|
Activated = 1 |
|
35
|
1 |
|
Closed = 2 |
|
36
|
|
|
|
|
37
|
|
|
|
|
38
|
1 |
|
class ServerDesc(object): |
|
39
|
1 |
|
def __init__(self, serv, cap=None): |
|
40
|
1 |
|
self.Server = serv |
|
41
|
1 |
|
self.Capabilities = cap |
|
42
|
|
|
|
|
43
|
|
|
|
|
44
|
1 |
|
class InternalServer(object): |
|
45
|
|
|
|
|
46
|
1 |
|
def __init__(self): |
|
47
|
1 |
|
self.logger = logging.getLogger(__name__) |
|
48
|
1 |
|
self.endpoints = [] |
|
49
|
1 |
|
self._channel_id_counter = 5 |
|
50
|
1 |
|
self.allow_remote_admin = True |
|
51
|
1 |
|
self.disabled_clock = False # for debugging we may want to disable clock that writes too much in log |
|
52
|
1 |
|
self._known_servers = {} # used if we are a discovery server |
|
53
|
|
|
|
|
54
|
1 |
|
self.aspace = AddressSpace() |
|
55
|
1 |
|
self.attribute_service = AttributeService(self.aspace) |
|
56
|
1 |
|
self.view_service = ViewService(self.aspace) |
|
57
|
1 |
|
self.method_service = MethodService(self.aspace) |
|
58
|
1 |
|
self.node_mgt_service = NodeManagementService(self.aspace) |
|
59
|
|
|
# import address space from code generated from xml |
|
60
|
1 |
|
standard_address_space.fill_address_space(self.node_mgt_service) |
|
61
|
|
|
# import address space from save db to disc |
|
62
|
|
|
#standard_address_space.fill_address_space_from_disk(self.aspace) |
|
63
|
|
|
|
|
64
|
|
|
# import address space directly from xml, this has preformance impact so disabled |
|
65
|
|
|
#importer = xmlimporter.XmlImporter(self.node_mgt_service) |
|
66
|
|
|
#importer.import_xml("/home/olivier/python-opcua/schemas/Opc.Ua.NodeSet2.xml") |
|
67
|
|
|
|
|
68
|
1 |
|
self.loop = utils.ThreadLoop() |
|
69
|
1 |
|
self.asyncio_transports = [] |
|
70
|
1 |
|
self.subscription_service = SubscriptionService(self.loop, self.aspace) |
|
71
|
|
|
|
|
72
|
1 |
|
self.history_manager = HistoryManager(self) |
|
73
|
|
|
|
|
74
|
|
|
# create a session to use on server side |
|
75
|
1 |
|
self.isession = InternalSession(self, self.aspace, self.subscription_service, "Internal", user=User.Admin) |
|
76
|
1 |
|
self.current_time_node = Node(self.isession, ua.NodeId(ua.ObjectIds.Server_ServerStatus_CurrentTime)) |
|
77
|
1 |
|
uries = ["http://opcfoundation.org/UA/"] |
|
78
|
1 |
|
ns_node = Node(self.isession, ua.NodeId(ua.ObjectIds.Server_NamespaceArray)) |
|
79
|
1 |
|
ns_node.set_value(uries) |
|
80
|
|
|
|
|
81
|
1 |
|
def load_address_space(self, path): |
|
82
|
|
|
self.aspace.load(path) |
|
83
|
|
|
|
|
84
|
1 |
|
def dump_address_space(self, path): |
|
85
|
|
|
self.aspace.dump(path) |
|
86
|
|
|
|
|
87
|
1 |
|
def start(self): |
|
88
|
1 |
|
self.logger.info("starting internal server") |
|
89
|
1 |
|
for edp in self.endpoints: |
|
90
|
1 |
|
self._known_servers[edp.Server.ApplicationUri] = ServerDesc(edp.Server) |
|
91
|
1 |
|
self.loop.start() |
|
92
|
1 |
|
Node(self.isession, ua.NodeId(ua.ObjectIds.Server_ServerStatus_State)).set_value(0) |
|
93
|
1 |
|
Node(self.isession, ua.NodeId(ua.ObjectIds.Server_ServerStatus_StartTime)).set_value(datetime.utcnow()) |
|
94
|
1 |
|
if not self.disabled_clock: |
|
95
|
1 |
|
self._set_current_time() |
|
96
|
|
|
|
|
97
|
1 |
|
def stop(self): |
|
98
|
1 |
|
self.logger.info("stopping internal server") |
|
99
|
1 |
|
self.loop.stop() |
|
100
|
1 |
|
self.history_manager.stop() |
|
101
|
|
|
|
|
102
|
1 |
|
def _set_current_time(self): |
|
103
|
1 |
|
self.current_time_node.set_value(datetime.utcnow()) |
|
104
|
1 |
|
self.loop.call_later(1, self._set_current_time) |
|
105
|
|
|
|
|
106
|
1 |
|
def get_new_channel_id(self): |
|
107
|
1 |
|
self._channel_id_counter += 1 |
|
108
|
1 |
|
return self._channel_id_counter |
|
109
|
|
|
|
|
110
|
1 |
|
def add_endpoint(self, endpoint): |
|
111
|
1 |
|
self.endpoints.append(endpoint) |
|
112
|
|
|
|
|
113
|
1 |
|
def get_endpoints(self, params=None, sockname=None): |
|
114
|
1 |
|
self.logger.info("get endpoint") |
|
115
|
1 |
|
if sockname: |
|
116
|
|
|
#return to client the ip address it has access to |
|
117
|
1 |
|
edps = [] |
|
118
|
1 |
|
for edp in self.endpoints: |
|
119
|
1 |
|
edp1 = copy(edp) |
|
120
|
1 |
|
url = urlparse(edp1.EndpointUrl) |
|
121
|
1 |
|
url = url._replace(netloc=sockname[0] + ":" + str(sockname[1])) |
|
122
|
1 |
|
edp1.EndpointUrl = url.geturl() |
|
123
|
1 |
|
edps.append(edp1) |
|
124
|
1 |
|
return edps |
|
125
|
1 |
|
return self.endpoints[:] |
|
126
|
|
|
|
|
127
|
1 |
|
def find_servers(self, params): |
|
128
|
1 |
|
if not params.ServerUris: |
|
129
|
1 |
|
return [desc.Server for desc in self._known_servers.values()] |
|
130
|
1 |
|
servers = [] |
|
131
|
1 |
|
for serv in self._known_servers.values(): |
|
132
|
1 |
|
serv_uri = serv.Server.ApplicationUri.split(":") |
|
133
|
1 |
|
for uri in params.ServerUris: |
|
134
|
1 |
|
uri = uri.split(":") |
|
135
|
1 |
|
if serv_uri[:len(uri)] == uri: |
|
136
|
1 |
|
servers.append(serv.Server) |
|
137
|
1 |
|
break |
|
138
|
1 |
|
return servers |
|
139
|
|
|
|
|
140
|
1 |
|
def register_server(self, server, conf=None): |
|
141
|
1 |
|
appdesc = ua.ApplicationDescription() |
|
142
|
1 |
|
appdesc.ApplicationUri = server.ServerUri |
|
143
|
1 |
|
appdesc.ProductUri = server.ProductUri |
|
144
|
1 |
|
appdesc.ApplicationName = server.ServerNames[0] # FIXME: select name from client locale |
|
145
|
1 |
|
appdesc.ApplicationType = server.ServerType |
|
146
|
1 |
|
appdesc.GatewayServerUri = server.GatewayServerUri |
|
147
|
1 |
|
appdesc.DiscoveryUrls = server.DiscoveryUrls # FIXME: select discovery uri using reachability from client network |
|
148
|
1 |
|
self._known_servers[server.ServerUri] = ServerDesc(appdesc, conf) |
|
149
|
|
|
|
|
150
|
1 |
|
def register_server2(self, params): |
|
151
|
|
|
return self.register_server(params.Server, params.DiscoveryConfiguration) |
|
152
|
|
|
|
|
153
|
1 |
|
def create_session(self, name, user=User.Anonymous, external=False): |
|
154
|
1 |
|
return InternalSession(self, self.aspace, self.subscription_service, name, user=user, external=external) |
|
155
|
|
|
|
|
156
|
1 |
|
def enable_history(self, node, period=timedelta(days=7), count=0): |
|
157
|
|
|
""" |
|
158
|
|
|
Set attribute Historizing of node to True and start storing data for history |
|
159
|
|
|
""" |
|
160
|
1 |
|
node.set_attribute(ua.AttributeIds.Historizing, ua.DataValue(True)) |
|
161
|
1 |
|
node.set_attr_bit(ua.AttributeIds.AccessLevel, ua.AccessLevel.HistoryRead) |
|
162
|
1 |
|
node.set_attr_bit(ua.AttributeIds.UserAccessLevel, ua.AccessLevel.HistoryRead) |
|
163
|
1 |
|
self.history_manager.historize(node, period, count) |
|
164
|
|
|
|
|
165
|
1 |
|
def disable_history(self, node): |
|
166
|
|
|
""" |
|
167
|
|
|
Set attribute Historizing of node to False and stop storing data for history |
|
168
|
|
|
""" |
|
169
|
1 |
|
node.set_attribute(ua.AttributeIds.Historizing, ua.DataValue(False)) |
|
170
|
1 |
|
node.unset_attr_bit(ua.AttributeIds.AccessLevel, ua.AccessLevel.HistoryRead) |
|
171
|
1 |
|
node.unset_attr_bit(ua.AttributeIds.UserAccessLevel, ua.AccessLevel.HistoryRead) |
|
172
|
1 |
|
self.history_manager.dehistorize(node) |
|
173
|
|
|
|
|
174
|
|
|
|
|
175
|
|
|
|
|
176
|
1 |
|
class InternalSession(object): |
|
177
|
1 |
|
_counter = 10 |
|
178
|
1 |
|
_auth_counter = 1000 |
|
179
|
|
|
|
|
180
|
1 |
|
def __init__(self, internal_server, aspace, submgr, name, user=User.Anonymous, external=False): |
|
181
|
1 |
|
self.logger = logging.getLogger(__name__) |
|
182
|
1 |
|
self.iserver = internal_server |
|
183
|
1 |
|
self.external = external # define if session is external, we need to copy some objects if it is internal |
|
184
|
1 |
|
self.aspace = aspace |
|
185
|
1 |
|
self.subscription_service = submgr |
|
186
|
1 |
|
self.name = name |
|
187
|
1 |
|
self.user = user |
|
188
|
1 |
|
self.nonce = None |
|
189
|
1 |
|
self.state = SessionState.Created |
|
190
|
1 |
|
self.session_id = ua.NodeId(self._counter) |
|
191
|
1 |
|
InternalSession._counter += 1 |
|
192
|
1 |
|
self.authentication_token = ua.NodeId(self._auth_counter) |
|
193
|
1 |
|
InternalSession._auth_counter += 1 |
|
194
|
1 |
|
self.subscriptions = [] |
|
195
|
1 |
|
self.logger.info("Created internal session %s", self.name) |
|
196
|
1 |
|
self._lock = Lock() |
|
197
|
|
|
|
|
198
|
1 |
|
def __str__(self): |
|
199
|
|
|
return "InternalSession(name:{}, user:{}, id:{}, auth_token:{})".format(self.name, self.user, self.session_id, self.authentication_token) |
|
200
|
|
|
|
|
201
|
1 |
|
def get_endpoints(self, params=None, sockname=None): |
|
202
|
1 |
|
return self.iserver.get_endpoints(params, sockname) |
|
203
|
|
|
|
|
204
|
1 |
|
def create_session(self, params, sockname=None): |
|
205
|
1 |
|
self.logger.info("Create session request") |
|
206
|
|
|
|
|
207
|
1 |
|
result = ua.CreateSessionResult() |
|
208
|
1 |
|
result.SessionId = self.session_id |
|
209
|
1 |
|
result.AuthenticationToken = self.authentication_token |
|
210
|
1 |
|
result.RevisedSessionTimeout = params.RequestedSessionTimeout |
|
211
|
1 |
|
result.MaxRequestMessageSize = 65536 |
|
212
|
1 |
|
self.nonce = utils.create_nonce(32) |
|
213
|
1 |
|
result.ServerNonce = self.nonce |
|
214
|
1 |
|
result.ServerEndpoints = self.get_endpoints(sockname=sockname) |
|
215
|
|
|
|
|
216
|
1 |
|
return result |
|
217
|
|
|
|
|
218
|
1 |
|
def close_session(self, delete_subs): |
|
219
|
1 |
|
self.logger.info("close session %s with subscriptions %s", self, self.subscriptions) |
|
220
|
1 |
|
self.state = SessionState.Closed |
|
221
|
1 |
|
self.delete_subscriptions(self.subscriptions[:]) |
|
222
|
|
|
|
|
223
|
1 |
|
def activate_session(self, params): |
|
224
|
1 |
|
self.logger.info("activate session") |
|
225
|
1 |
|
result = ua.ActivateSessionResult() |
|
226
|
1 |
|
if self.state != SessionState.Created: |
|
227
|
|
|
raise utils.ServiceError(ua.StatusCodes.BadSessionIdInvalid) |
|
228
|
1 |
|
self.nonce = utils.create_nonce(32) |
|
229
|
1 |
|
result.ServerNonce = self.nonce |
|
230
|
1 |
|
for _ in params.ClientSoftwareCertificates: |
|
231
|
|
|
result.Results.append(ua.StatusCode()) |
|
232
|
1 |
|
self.state = SessionState.Activated |
|
233
|
1 |
|
id_token = params.UserIdentityToken |
|
234
|
1 |
|
if isinstance(id_token, ua.UserNameIdentityToken): |
|
235
|
1 |
|
if self.iserver.allow_remote_admin and id_token.UserName in ("admin", "Admin"): |
|
236
|
1 |
|
self.user = User.Admin |
|
237
|
1 |
|
self.logger.info("Activated internal session %s for user %s", self.name, self.user) |
|
238
|
1 |
|
return result |
|
239
|
|
|
|
|
240
|
1 |
|
def read(self, params): |
|
241
|
1 |
|
results = self.iserver.attribute_service.read(params) |
|
242
|
1 |
|
if self.external: |
|
243
|
1 |
|
return results |
|
244
|
1 |
|
return [deepcopy(dv) for dv in results] |
|
245
|
|
|
|
|
246
|
1 |
|
def history_read(self, params): |
|
247
|
1 |
|
return self.iserver.history_manager.read_history(params) |
|
248
|
|
|
|
|
249
|
1 |
|
def write(self, params): |
|
250
|
1 |
|
if not self.external: |
|
251
|
|
|
# If session is internal we need to store a copy og object, not a reference, |
|
252
|
|
|
#otherwise users may change it and we will not generate expected events |
|
253
|
1 |
|
params.NodesToWrite = [deepcopy(ntw) for ntw in params.NodesToWrite] |
|
254
|
1 |
|
return self.iserver.attribute_service.write(params, self.user) |
|
255
|
|
|
|
|
256
|
1 |
|
def browse(self, params): |
|
257
|
1 |
|
return self.iserver.view_service.browse(params) |
|
258
|
|
|
|
|
259
|
1 |
|
def translate_browsepaths_to_nodeids(self, params): |
|
260
|
1 |
|
return self.iserver.view_service.translate_browsepaths_to_nodeids(params) |
|
261
|
|
|
|
|
262
|
1 |
|
def add_nodes(self, params): |
|
263
|
1 |
|
return self.iserver.node_mgt_service.add_nodes(params, self.user) |
|
264
|
|
|
|
|
265
|
1 |
|
def delete_nodes(self, params): |
|
266
|
1 |
|
return self.iserver.node_mgt_service.delete_nodes(params, self.user) |
|
267
|
|
|
|
|
268
|
1 |
|
def add_references(self, params): |
|
269
|
1 |
|
return self.iserver.node_mgt_service.add_references(params, self.user) |
|
270
|
|
|
|
|
271
|
1 |
|
def delete_references(self, params): |
|
272
|
|
|
return self.iserver.node_mgt_service.delete_references(params, self.user) |
|
273
|
|
|
|
|
274
|
1 |
|
def add_method_callback(self, methodid, callback): |
|
275
|
1 |
|
return self.aspace.add_method_callback(methodid, callback) |
|
276
|
|
|
|
|
277
|
1 |
|
def call(self, params): |
|
278
|
1 |
|
return self.iserver.method_service.call(params) |
|
279
|
|
|
|
|
280
|
1 |
|
def create_subscription(self, params, callback): |
|
281
|
1 |
|
result = self.subscription_service.create_subscription(params, callback) |
|
282
|
1 |
|
with self._lock: |
|
283
|
1 |
|
self.subscriptions.append(result.SubscriptionId) |
|
284
|
1 |
|
return result |
|
285
|
|
|
|
|
286
|
1 |
|
def create_monitored_items(self, params): |
|
287
|
1 |
|
return self.subscription_service.create_monitored_items(params) |
|
288
|
|
|
|
|
289
|
1 |
|
def modify_monitored_items(self, params): |
|
290
|
|
|
return self.subscription_service.modify_monitored_items(params) |
|
291
|
|
|
|
|
292
|
1 |
|
def republish(self, params): |
|
293
|
|
|
return self.subscription_service.republish(params) |
|
294
|
|
|
|
|
295
|
1 |
|
def delete_subscriptions(self, ids): |
|
296
|
1 |
|
for i in ids: |
|
297
|
1 |
|
with self._lock: |
|
298
|
1 |
|
if i in self.subscriptions: |
|
299
|
1 |
|
self.subscriptions.remove(i) |
|
300
|
1 |
|
return self.subscription_service.delete_subscriptions(ids) |
|
301
|
|
|
|
|
302
|
1 |
|
def delete_monitored_items(self, params): |
|
303
|
1 |
|
return self.subscription_service.delete_monitored_items(params) |
|
304
|
|
|
|
|
305
|
1 |
|
def publish(self, acks=None): |
|
306
|
1 |
|
if acks is None: |
|
307
|
1 |
|
acks = [] |
|
308
|
|
|
return self.subscription_service.publish(acks) |
|
309
|
|
|
|
FreeOpcUa /
python-opcua
