aboutsummaryrefslogtreecommitdiffstats
path: root/lib/common_test/doc/src/ct_netconfc.xml
blob: 7ec8f23073d5f2cb0e3dee96f898378c3fe81fca (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE erlref SYSTEM "erlref.dtd">

<erlref>
  <header>
    <copyright>
      <year>2010</year><year>2017</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      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.

    </legalnotice>

    <title>ct_netconfc</title>
    <prepared></prepared>
    <responsible></responsible>
    <docno></docno>
    <approved></approved>
    <checked></checked>
    <date></date>
    <rev>A</rev>
    <file>ct_netconfc.xml</file>
  </header>
  <module>ct_netconfc</module>
  <modulesummary>NETCONF client module.</modulesummary>

  <description>

    <p>NETCONF client module.</p>

    <p>The NETCONF client is compliant with RFC 4741 NETCONF Configuration
      Protocol and RFC 4742 Using the NETCONF Configuration Protocol over
      Secure SHell (SSH).</p>

    <marker id="Connecting"/>
    <p><em>Connecting to a NETCONF server</em></p>

    <p>NETCONF sessions can either be opened by a single call
      to <seealso marker="#open-1"><c>open/1,2</c></seealso> or by a call
      to <seealso marker="#connect-1"><c>connect/1,2</c></seealso> followed
      by one or more calls to
      <seealso marker="#session-1"><c>session/1,2,3</c></seealso>.</p>

    <p>The properties of the sessions will be exactly the same, except
      that when
      using <seealso marker="#connect-1"><c>connect/1,2</c></seealso>, you
      may start multiple sessions over the same SSH connection. Each
      session is implemented as an SSH channel.</p>

    <p><seealso marker="#open-1"><c>open/1,2</c></seealso> will establish one
      SSH connection with one SSH channel implementing one NETCONF
      session. You may start mutiple sessions by
      calling <seealso marker="#open-1"><c>open/1,2</c></seealso> multiple
      times, but then a new SSH connection will be established for each
      session.</p>

    <p>For each server to test against, the following entry can be added to a
      configuration file:</p>

    <pre>
 {server_id(),options()}.</pre>

    <p>The <seealso marker="#type-server_id"><c>server_id()</c></seealso>
      or an associated
      <seealso marker="ct#type-target_name"><c>ct:target_name()</c></seealso>
      must then be used in calls to
      <seealso marker="#connect-2"><c>connect/2</c></seealso>
      or <seealso marker="#open-2"><c>open/2</c></seealso>.</p>

    <p>If no configuration exists for a server,
      use <seealso marker="#connect-1"><c>connect/1</c></seealso>
      or <seealso marker="#open-1"><c>open/1</c></seealso> instead,
      and specify all necessary options in the <c>Options</c> parameter.</p>

    <marker id="Logging"/>
    <p><em>Logging</em></p>

    <p>The NETCONF server uses <c>error_logger</c> for logging of NETCONF
      traffic. A special purpose error handler is implemented in
      <c>ct_conn_log_h</c>. To use this error handler, add the
      <c>cth_conn_log</c> hook in the test suite, for example:</p>

    <pre>
 suite() -&gt;
    [{ct_hooks, [{cth_conn_log, [{<seealso marker="ct#type-conn_log_mod"><c>ct:conn_log_mod()</c></seealso>,<seealso marker="ct#type-conn_log_options"><c>ct:conn_log_options()</c></seealso>}]}]}].</pre>

    <p><c>conn_log_mod()</c> is the name of the <c>Common Test</c> module
      implementing the connection protocol, for example, <c>ct_netconfc</c>.</p>

    <p>Hook option <c>log_type</c> specifies the type of logging:</p>

    <taglist>
      <tag><c>raw</c></tag>
      <item><p>The sent and received NETCONF data is logged to a separate
        text file "as is" without any formatting. A link to the file is
        added to the test case HTML log.</p></item>

      <tag><c>pretty</c></tag>
      <item><p>The sent and received NETCONF data is logged to a separate
        text file with XML data nicely indented. A link to the file is
        added to the test case HTML log.</p></item>

      <tag><c>html (default)</c></tag>
      <item><p>The sent and received NETCONF traffic is pretty printed
        directly in the test case HTML log.</p></item>

      <tag><c>silent</c></tag>
      <item><p>NETCONF traffic is not logged.</p></item>
    </taglist>

    <p>By default, all NETCONF traffic is logged in one single log file.
      However, different connections can be logged in separate files.
      To do this, use hook option <c>hosts</c> and list the names of the
      servers/connections to be used in the suite. The connections
      must be named for this to work, that is, they must be opened with
      <seealso marker="#open-2"><c>open/2</c></seealso>.</p>

    <p>Option <c>hosts</c> has no effect if <c>log_type</c> is set to
      <c>html</c> or <c>silent</c>.</p>

    <p>The hook options can also be specified in a configuration file with
      configuration variable <c>ct_conn_log</c>:</p>

    <pre>
 {ct_conn_log,[{<seealso marker="ct#type-conn_log_mod"><c>ct:conn_log_mod()</c></seealso>,<seealso marker="ct#type-conn_log_options"><c>ct:conn_log_options()</c></seealso>}]}.</pre>

    <p>For example:</p>

    <pre>
 {ct_conn_log,[{ct_netconfc,[{log_type,pretty},
                             {hosts,[<seealso marker="ct#type-key_or_name"><c>ct:key_or_name()</c></seealso>]}]}]}</pre>

    <note>
      <p>Hook options specified in a configuration file overwrite the
        hard-coded hook options in the test suite.</p>
    </note>

    <p><em>Logging Example 1:</em></p>
    <marker id="Logging_example_1"/>

    <p>The following <c>ct_hooks</c> statement causes pretty printing of
      NETCONF traffic to separate logs for the connections named
      <c>nc_server1</c> and <c>nc_server2</c>. Any other connections are
      logged to default NETCONF log.</p>

    <pre>
 suite() -&gt;
    [{ct_hooks, [{cth_conn_log, [{ct_netconfc,[{log_type,pretty}},
                                               {hosts,[nc_server1,nc_server2]}]}
                                ]}]}].</pre>

    <p>Connections must be opened as follows:</p>

    <pre>
 open(nc_server1,[...]),
 open(nc_server2,[...]).</pre>

    <p><em>Logging Example 2:</em></p>
    <marker id="Logging_example_2"/>

    <p>The following configuration file causes raw logging of all NETCONF 
      traffic in to one single text file:</p>

    <pre>
 {ct_conn_log,[{ct_netconfc,[{log_type,raw}]}]}.</pre>

    <p>The <c>ct_hooks</c> statement must look as follows:</p>

    <pre>
 suite() -&gt;
    [{ct_hooks, [{cth_conn_log, []}]}].</pre>

    <p>The same <c>ct_hooks</c> statement without the configuration file
      would cause HTML logging of all NETCONF connections in to the test
      case HTML log.</p>

    <marker id="Notifications"/>
    <p><em>Notifications</em></p>

    <p>The NETCONF client is also compliant with RFC 5277 NETCONF Event
      Notifications, which defines a mechanism for an asynchronous message 
      notification delivery service for the NETCONF protocol.</p>

    <p>Specific functions to support this are
      <seealso marker="#create_subscription-1"><c>create_subscription/1-6</c></seealso>
      and
      <seealso marker="#get_event_streams-1"><c>get_event_streams/1-3</c></seealso>.</p>

    <marker id="Default_timeout"/>
    <p><em>Default Timeout</em></p>

    <p>Most of the functions in this module have one variant with
      a <c>Timeout</c> parameter, and one without. If nothing else is
      specified, the default value <c>infinity</c> is used when
      the <c>Timeout</c> parameter is not given.</p>

  </description>

  <datatypes>
    <datatype>
      <name name="client"/>
    </datatype>
    <datatype>
      <name name="error_reason"/>
    </datatype>
    <datatype>
      <name name="event_time"/>
    </datatype>
    <datatype>
      <name name="handle"/>
      <desc>
	<p>Opaque reference for a connection to a NETCONF server or a
	  NETCONF session.</p>
      </desc>
    </datatype>
    <datatype>
      <name name="host"/>
    </datatype>
    <datatype>
      <name name="netconf_db"/>
    </datatype>
    <datatype>
      <name name="notification"/>
    </datatype>
    <datatype>
      <name name="notification_content"/>
    </datatype>
    <datatype>
      <name name="option"/>
      <desc>
        <p><c>SshConnectOption</c> is any valid option to
          <seealso marker="ssh:ssh#connect-3"><c>ssh:connect/3,4</c></seealso>.
	  Common options used are <c>user</c>, <c>password</c>
	  and <c>user_dir</c>. The <c>SshConnectOptions</c> are
	  verfied by the SSH application.</p>
      </desc>
    </datatype>
    <datatype>
      <name name="options"/>
      <desc>
	<p>Options used for setting up an SSH connection to a NETCONF
          server.</p>
      </desc>
    </datatype>
    <datatype>
      <name name="server_id"/>
      <desc>
        <p>The identity of a server, specified in a configuration
          file.</p>
      </desc>
    </datatype>
    <datatype>
      <name name="simple_xml"/>
      <desc>
	<p>This type is further described in application
          <seealso marker="xmerl:index"><c>xmerl</c></seealso>.</p>
      </desc>
    </datatype>
    <datatype>
      <name name="stream_data"/>
      <desc>
	<p>For details about the data format for the string values, see
          "XML Schema for Event Notifications" in RFC 5277.</p>
      </desc>
    </datatype>
    <datatype>
      <name name="stream_name"/>
    </datatype>
    <datatype>
      <name name="streams"/>
    </datatype>
    <datatype>
      <name name="xml_attribute_tag"/>
    </datatype>
    <datatype>
      <name name="xml_attribute_value"/>
    </datatype>
    <datatype>
      <name name="xml_attributes"/>
    </datatype>
    <datatype>
      <name name="xml_content"/>
    </datatype>
    <datatype>
      <name name="xml_tag"/>
    </datatype>
    <datatype>
      <name name="xpath"/>
    </datatype>
    <datatype>
      <name name="xs_datetime"/>
      <desc>
	<p>This date and time identifier has the same format as the XML type
          <c>dateTime</c> and is compliant with RFC 3339 Date and Time on
          the Internet Timestamps. The format is as follows:</p>
	<pre>
 [-]CCYY-MM-DDThh:mm:ss[.s][Z|(+|-)hh:mm]</pre>
      </desc>
    </datatype>
  </datatypes>

  <funcs>
    <func>
      <name name="action" arity="2"/>
      <name name="action" arity="3"/>
      <fsummary>Executes an action.</fsummary>
      <desc>
        <p>Executes an action. If the return type is void, <c>ok</c> is
          returned instead of <c>{ok,[simple_xml()]}</c>.</p>
      </desc>
    </func>

    <func>
      <name name="close_session" arity="1"/>
      <name name="close_session" arity="2"/>
      <fsummary>Requests graceful termination of the session associated with
        the client.</fsummary>
      <desc>
        <p>Requests graceful termination of the session associated with the
          client.</p>

        <p>When a NETCONF server receives a <c>close-session</c> request, it
          gracefully closes the session.  The server releases any locks and
          resources associated with the session and gracefully closes any
          associated connections. Any NETCONF requests received after a
          <c>close-session</c> request are ignored.</p>
      </desc>
    </func>

    <func>
      <name name="connect" arity="1"/>
      <fsummary>Opens an SSH connection to a NETCONF server.</fsummary>
      <desc>
        <p>Opens an SSH connection to a NETCONF server.</p>

        <p>If the server options are specified in a configuration file, use
          <seealso marker="#connect-2"><c>connect/2</c></seealso>
          instead.</p>

        <p>The opaque <seealso marker="#type-handle"><c>handle()</c></seealso>
	  reference returned from this
          function is required as connection identifier when opening
          sessions over this connection, see
          <seealso marker="#session-1"><c>session/1,2,3</c></seealso>.</p>

        <p>Option <c>timeout</c> (milliseconds) is used when setting up the
          SSH connection. It is not used for any other purposes during the
          lifetime of the connection.</p>
      </desc>
    </func>

    <func>
      <name name="connect" arity="2"/>
      <fsummary>Opens an SSH connection to a named NETCONF server.</fsummary>
      <desc>
        <p>Open an SSH connection to a named NETCONF server.</p>

        <p>If <c><anno>KeyOrName</anno></c> is a
          configured <c>server_id()</c> or a
          <c>target_name()</c> associated with such an Id, then the options
          for this server are fetched from the configuration file.</p>

        <p>Argument <c><anno>ExtraOptions</anno></c> is added to the
          options found in the configuration file. If the same options
          are specified, the values from the configuration file
          overwrite <c><anno>ExtraOptions</anno></c>.</p>

        <p>If the server is not specified in a configuration file, use
          <seealso marker="#connect-1"><c>connect/1</c></seealso>
          instead.</p>

        <p>The opaque <seealso marker="#type-handle"><c>handle()</c></seealso>
	  reference returned from this
          function can be used as connection identifier when opening
          sessions over this connection, see
          <seealso marker="#session-1"><c>session/1,2,3</c></seealso>.
          However, if <c><anno>KeyOrName</anno></c> is a
          <c>target_name()</c>, that is, if the server is named through a
          call to <seealso marker="ct#require-2"><c>ct:require/2</c></seealso>
          or a <c>require</c> statement in the test suite, then this name can
          be used instead of
	  <seealso marker="#type-handle"><c>handle()</c></seealso>.</p>

        <p>Option <c>timeout</c> (milliseconds) is used when setting up the
          SSH connection. It is not used for any other purposes during the
          lifetime of the connection.</p>
      </desc>
    </func>

    <func>
      <name name="copy_config" arity="3"/>
      <name name="copy_config" arity="4"/>
      <fsummary>Copies configuration data.</fsummary>
      <desc>
        <p>Copies configuration data.</p>

        <p>Which source and target options that can be issued depends on the
          capabilities supported by the server. That is, <c>:candidate</c>
          and/or <c>:startup</c> are required.</p>
      </desc>
    </func>

    <func>
      <name>create_subscription(Client) -> Result</name>
      <name>create_subscription(Client, Stream) -> Result</name>
      <name>create_subscription(Client, Stream, Filter) -> Result</name>
      <name>create_subscription(Client, Stream, Filter, Timeout) -> Result</name>
      <name name="create_subscription" arity="5" clause_i="2"/>
      <name name="create_subscription" arity="6"/>
      <fsummary>Creates a subscription for event notifications.</fsummary>
      <desc>
        <p>Creates a subscription for event notifications.</p>

        <p>This function sets up a subscription for NETCONF event
          notifications of the specified stream type, matching the specified
          filter. The calling process receives notifications as messages of
          type <seealso marker="#type-notification"><c>notification()</c></seealso>.</p>

	<p>Only a subset of the function clauses are show above. The
	  full set of valid combinations of input parameters is as
	  follows:</p>

<pre>create_subscription(Client)

create_subscription(Client, Timeout)
create_subscription(Client, Stream)
create_subscription(Client, Filter)

create_subscription(Client, Stream, Timeout)
create_subscription(Client, Filter, Timeout)
create_subscription(Client, Stream, Filter)
create_subscription(Client, StartTime, StopTime)

create_subscription(Client, Stream, Filter, Timeout)
create_subscription(Client, StartTime, StopTime, Timeout)
create_subscription(Client, Stream, StartTime, StopTime)
create_subscription(Client, Filter, StartTime, StopTime)

create_subscription(Client, Stream, StartTime, StopTime, Timeout)
create_subscription(Client, Stream, Filter, StartTime, StopTime)
create_subscription(Client, Stream, Filter, StartTime, StopTime, Timeout)</pre>

        <taglist>
          <tag><c><anno>Stream</anno></c></tag>
          <item><p>Optional parameter that indicates which stream of event
            is of interest. If not present, events in the default NETCONF
            stream are sent.</p></item>
          <tag><c><anno>Filter</anno></c></tag>
          <item><p>Optional parameter that indicates which subset of all
            possible events is of interest. The parameter format is the
            same as that of the filter parameter in the NETCONF protocol
            operations. If not present, all events not precluded by other
            parameters are sent.</p></item>
          <tag><c><anno>StartTime</anno></c></tag>
          <item><p>Optional parameter used to trigger the replay feature and
              indicate that the replay is to start at the time specified.
              If <c><anno>StartTime</anno></c> is not present, this is not a
	      replay subscription.</p>
            <p>It is not valid to specify start times that are later than
              the current time. If <c><anno>StartTime</anno></c> is specified
	      earlier than the log can support, the replay begins with the
	      earliest available notification.</p>
            <p>This parameter is of type <c>dateTime</c> and compliant to
              RFC 3339. Implementations must support time zones.</p></item>
          <tag><c><anno>StopTime</anno></c></tag>
          <item><p>Optional parameter used with the optional replay feature
              to indicate the newest notifications of interest. If
              <c><anno>StopTime</anno></c> is not present, the notifications
	      continues until the subscription is terminated.</p>
            <p>Must be used with and be later than <c>StartTime</c>. Values
              of <c><anno>StopTime</anno></c> in the future are valid. This
	      parameter is of type <c>dateTime</c> and compliant to RFC 3339.
              Implementations must support time zones.</p></item>
        </taglist>

        <p>For more details about the event notification mechanism, see
          RFC 5277.</p>
      </desc>
    </func>

    <func>
      <name name="delete_config" arity="2"/>
      <name name="delete_config" arity="3"/>
      <fsummary>Deletes configuration data.</fsummary>
      <desc>
        <p>Deletes configuration data.</p>

        <p>The running configuration cannot be deleted and <c>:candidate</c>
          or <c>:startup</c> must be advertised by the server.</p>
      </desc>
    </func>

     <func>
      <name name="disconnect" arity="1"/>
      <fsummary>Closes the given SSH connection.</fsummary>
      <desc>
	<p>Closes the given SSH connection.</p>

	<p>If there are open NETCONF sessions on the connection, these
	  will be brutally aborted. To avoid this, close each session
	  with <seealso marker="#close_session-1"><c>close_session/1,2</c></seealso></p>
      </desc>
    </func>

    <func>
      <name name="edit_config" arity="3"/>
      <name name="edit_config" arity="4" clause_i="1"/>
      <name name="edit_config" arity="4" clause_i="2"/>
      <name name="edit_config" arity="5"/>
      <fsummary>Edits configuration data.</fsummary>
      <desc>
        <p>Edits configuration data.</p>

        <p>By default only the running target is available, unless the server
          includes <c>:candidate</c> or <c>:startup</c> in its list of
          capabilities.</p>

        <p><c>OptParams</c> can be used for specifying optional parameters
          (<c>default-operation</c>, <c>test-option</c>, or
          <c>error-option</c>) to be added to the <c>edit-config</c>
          request. The value must be a list containing valid simple XML,
          for example:</p>

        <pre>
 [{'default-operation', ["none"]},
  {'error-option', ["rollback-on-error"]}]</pre>

	<p>If <c><anno>OptParams</anno></c> is not given, the default
	  value <c>[]</c> is used.</p>
      </desc>
    </func>

    <func>
      <name name="get" arity="2"/>
      <name name="get" arity="3"/>
      <fsummary>Gets data.</fsummary>
      <desc>
        <p>Gets data.</p>
 
        <p>This operation returns both configuration and state data from the
          server.</p>

        <p>Filter type <c>xpath</c> can be used only if the server supports
          <c>:xpath</c>.</p>
      </desc>
    </func>

    <func>
      <name name="get_capabilities" arity="1"/>
      <name name="get_capabilities" arity="2"/>
      <fsummary>Returns the server side capabilities.</fsummary>
      <desc>
        <p>Returns the server side capabilities.</p>

        <p>The following capability identifiers, defined in RFC 4741 NETCONF
          Configuration Protocol, can be returned:</p>

        <list>
          <item><p><c>"urn:ietf:params:netconf:base:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:writable-running:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:candidate:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:confirmed-commit:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:rollback-on-error:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:startup:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:url:1.0"</c></p></item>
          <item><p><c>"urn:ietf:params:netconf:capability:xpath:1.0"</c></p></item>
        </list>
 
        <p>More identifiers can exist, for example, server-side namespace.</p>
      </desc>
    </func>

    <func>
      <name name="get_config" arity="3"/>
      <name name="get_config" arity="4"/>
      <fsummary>Gets configuration data.</fsummary>
      <desc>
        <p>Gets configuration data.</p>

        <p>To be able to access another source than <c>running</c>, the
          server must advertise <c>:candidate</c> and/or <c>:startup</c>.</p>

        <p>Filter type <c>xpath</c> can be used only if the server supports
          <c>:xpath</c>.</p>
      </desc>
    </func>

    <func>
      <name name="get_event_streams" arity="1"/>
      <name name="get_event_streams" arity="2" clause_i="1"/>
      <name name="get_event_streams" arity="2" clause_i="2"/>
      <name name="get_event_streams" arity="3"/>
      <fsummary>Sends a request to get the specified event streams.</fsummary>
      <desc>
        <p>Sends a request to get the specified event streams.</p>

        <p><c>Streams</c> is a list of stream names. The following filter is
          sent to the NETCONF server in a <c>get</c> request:</p>

        <pre>
 &lt;netconf xmlns="urn:ietf:params:xml:ns:netmod:notification"&gt;
   &lt;streams&gt;
     &lt;stream&gt;
       &lt;name&gt;StreamName1&lt;/name&gt;
     &lt;/stream&gt;
     &lt;stream&gt;
       &lt;name&gt;StreamName2&lt;/name&gt;
     &lt;/stream&gt;
     ...
   &lt;/streams&gt;
 &lt;/netconf&gt;</pre>

        <p>If <c>Streams</c> is an empty list, <em>all</em> streams are
          requested by sending the following filter:</p>

        <pre>
 &lt;netconf xmlns="urn:ietf:params:xml:ns:netmod:notification"&gt;
   &lt;streams/&gt;
 &lt;/netconf&gt;</pre>

        <p>If more complex filtering is needed, use
          <seealso marker="#get-2"><c>ct_netconfc:get/2,3</c></seealso> and
          specify the exact filter according to "XML Schema for Event
          Notifications" in RFC 5277.</p>
      </desc>
    </func>

    <func>
      <name name="get_session_id" arity="1"/>
      <name name="get_session_id" arity="2"/>
      <fsummary>Returns the session Id associated with the specified
        client.</fsummary>
      <desc>
        <p>Returns the session Id associated with the specified client.</p>
      </desc>
    </func>

    <func>
      <name name="hello" arity="1"/>
      <name name="hello" arity="2"/>
      <name name="hello" arity="3"/>
      <fsummary>Exchanges hello messages with the server.</fsummary>
      <desc>
        <p>Exchanges <c>hello</c> messages with the server.</p>

        <p>Adds optional capabilities and sends a <c>hello</c> message to the
          server and waits for the return.</p>
      </desc>
    </func>

    <func>
      <name name="kill_session" arity="2"/>
      <name name="kill_session" arity="3"/>
      <fsummary>Forces termination of the session associated with the supplied
        session Id.</fsummary>
      <desc>
        <p>Forces termination of the session associated with the supplied
          session Id.</p>

        <p>The server side must abort any ongoing operations, release any
          locks and resources associated with the session, and close any
          associated connections.</p>

        <p>Only if the server is in the confirmed commit phase, the
          configuration is restored to its state before entering the confirmed
          commit phase. Otherwise, no configuration rollback is performed.</p>

         <p>If the specified <c>SessionId</c> is equal to the current session
           Id, an error is returned.</p>
      </desc>
    </func>

    <func>
      <name name="lock" arity="2"/>
      <name name="lock" arity="3"/>
      <fsummary>Locks the configuration target.</fsummary>
      <desc>
        <p>Locks the configuration target.</p>

        <p>Which target parameters that can be used depends on if
          <c>:candidate</c> and/or <c>:startup</c> are supported by the
          server. If successfull, the configuration system of the device is
          unavailable to other clients (NETCONF, CORBA, SNMP, and so on).
          Locks are intended to be short-lived.</p>

         <p>Operation
           <seealso marker="#kill_session-2"><c>kill_session/2,3</c></seealso>
           can be used to force the release of a lock owned by another NETCONF
           session. How this is achieved by the server side is
           implementation-specific.</p>
      </desc>
    </func>

    <func>
      <name name="only_open" arity="1"/>
      <fsummary>Opens a NETCONF session, but does not send hello.</fsummary>
      <desc>
        <p>Opens a NETCONF session, but does not send <c>hello</c>.</p>

        <p>As <seealso marker="#open-1"><c>open/1</c></seealso>, but
          does not send a <c>hello</c> message.</p>
      </desc>
    </func>

    <func>
      <name name="only_open" arity="2"/>
      <fsummary>Opens a named NETCONF session, but does not send hello.</fsummary>
      <desc>
        <p>Opens a named NETCONF session, but does not send <c>hello</c>.</p>

        <p>As <seealso marker="#open-2"><c>open/2</c></seealso>, but
          does not send a <c>hello</c> message.</p>
      </desc>
    </func>

    <func>
      <name name="open" arity="1"/>
      <fsummary>Opens a NETCONF session and exchanges hello messages.</fsummary>
      <desc>
        <p>Opens a NETCONF session and exchanges <c>hello</c> messages.</p>

        <p>If the server options are specified in a configuration file,
          or if a named client is needed for logging purposes (see section
          <seealso marker="#Logging">Logging</seealso> in this module), use
          <seealso marker="#open-2"><c>open/2</c></seealso>
          instead.</p>

        <p>The opaque <seealso marker="#type-handle"><c>handle()</c></seealso>
	  reference returned from this
          function is required as client identifier when calling any other
          function in this module.</p>

        <p>Option <c>timeout</c> (milliseconds) is used when setting up the
          SSH connection and when waiting for the <c>hello</c> message from
          the server. It is not used for any other purposes during the
          lifetime of the connection.</p>
      </desc>
    </func>

    <func>
      <name name="open" arity="2"/>
      <fsummary>Opens a named NETCONF session and exchanges hello
        messages.</fsummary>
      <desc>
        <p>Opens a named NETCONF session and exchanges <c>hello</c>
          messages.</p>

         <p>If <c><anno>KeyOrName</anno></c> is a
           configured <c>server_id()</c> or a
           <c>target_name()</c> associated with such an Id, then the options
           for this server are fetched from the configuration file.</p>

         <p>Argument <c><anno>ExtraOptions</anno></c> is added to the
           options found in the configuration file. If the same
           options are specified, the values from the configuration
           file overwrite <c><anno>ExtraOptions</anno></c>.</p>

         <p>If the server is not specified in a configuration file, use
           <seealso marker="#open-1"><c>open/1</c></seealso>
           instead.</p>

         <p>The opaque <seealso marker="#type-handle"><c>handle()</c></seealso>
	   reference returned from this
           function can be used as client identifier when calling any other
           function in this module. However, if <c><anno>KeyOrName</anno></c> is a
           <c>target_name()</c>, that is, if the server is named through a
           call to <seealso marker="ct#require-2"><c>ct:require/2</c></seealso>
           or a <c>require</c> statement in the test suite, then this name can
           be used instead of
	   <seealso marker="#type-handle"><c>handle()</c></seealso>.</p>

        <p>Option <c>timeout</c> (milliseconds) is used when setting up the
          SSH connection and when waiting for the <c>hello</c> message from
          the server. It is not used for any other purposes during the
          lifetime of the connection.</p>

         <p>See also
           <seealso marker="ct#require-2"><c>ct:require/2</c></seealso>.</p>
      </desc>
    </func>

    <func>
      <name name="send" arity="2"/>
      <name name="send" arity="3"/>
      <fsummary>Sends an XML document to the server.</fsummary>
      <desc>
        <p>Sends an XML document to the server.</p>

        <p>The specified XML document is sent "as is" to the server. This
          function can be used for sending XML documents that cannot be
          expressed by other interface functions in this module.</p>
      </desc>
    </func>

    <func>
      <name name="send_rpc" arity="2"/>
      <name name="send_rpc" arity="3"/>
      <fsummary>Sends a NETCONF rpc request to the server.</fsummary>
      <desc>
        <p>Sends a NETCONF <c>rpc</c> request to the server.</p>

        <p>The specified XML document is wrapped in a valid NETCONF <c>rpc</c>
          request and sent to the server. The <c>message-id</c> and namespace
          attributes are added to element <c>rpc</c>.</p>

        <p>This function can be used for sending <c>rpc</c> requests that
          cannot be expressed by other interface functions in this module.</p>
      </desc>
    </func>

    <func>
      <name name="session" arity="1"/>
      <name name="session" arity="2" clause_i="1"/>
      <name name="session" arity="2" clause_i="2"/>
      <name name="session" arity="3"/>
      <fsummary>Opens a NETCONF session as a channel on the given SSH
	connection, and exchanges hello messages with the
	server.</fsummary>
      <type name="session_options"/>
      <type name="session_option"/>
      <desc>
	<p>Opens a NETCONF session as a channel on the given SSH
          connection, and exchanges hello messages with the server.</p>

        <p>The opaque <seealso marker="#type-handle"><c>handle()</c></seealso>
	  reference returned from this
          function can be used as client identifier when calling any
          other function in this module. However, if <c><anno>KeyOrName</anno></c>
          is used and it is a <c>target_name()</c>, that is, if the
          server is named through a call
          to <seealso marker="ct#require-2"><c>ct:require/2</c></seealso>
          or a <c>require</c> statement in the test suite, then this
          name can be used instead of
	  <seealso marker="#type-handle"><c>handle()</c></seealso>.</p>

      </desc>
    </func>

    <func>
      <name name="unlock" arity="2"/>
      <name name="unlock" arity="3"/>
      <fsummary>Unlocks the configuration target.</fsummary>
      <desc>
        <p>Unlocks the configuration target.</p>

        <p>If the client earlier has acquired a lock through
          <seealso marker="#lock-2"><c>lock/2,3</c></seealso>, this
          operation releases the associated lock. To access another target
          than <c>running</c>, the server must support <c>:candidate</c>
          and/or <c>:startup</c>.</p>
      </desc>
    </func>
  </funcs>

</erlref>