aboutsummaryrefslogblamecommitdiffstats
path: root/lib/snmp/doc/src/snmpa.xml
blob: 27d89ea4e39392e3c185a4d28942830a00ed3fa7 (plain) (tree)
1
2
3
4
5
6
7
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
                                            



                                     
                                        






                                                                         
 


                                                                            
 



















































































































































































































































































































































































































































































































































































































































                                                                                                                          












                                                           
















































































































































































































                                                                                                             
                                                   

             







                                                                                                                                                                                        





















































































































                                                                                                      



                                                                                                                 
                                                                                                                                



















                                                                                       
                                       

                                                            






                                                                         
                                                                    

                                                                    





                                                                     




                                                                            




                                                                            








































































































                                                                                                                          
 





                                                                           
 



                                                                          





                                                                               









                                                                            

             























































































                                                                                                                                                 
                                                              













                                                                                   
                                                              
                                                       































                                                                     


























                                                                                                                     
<?xml version="1.0" encoding="iso-8859-1" ?>
<!DOCTYPE erlref SYSTEM "erlref.dtd">

<erlref>
  <header>
    <copyright>
      <year>2004</year><year>2011</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      The contents of this file are subject to the Erlang Public License,
      Version 1.1, (the "License"); you may not use this file except in
      compliance with the License. You should have received a copy of the
      Erlang Public License along with this software. If not, it can be
      retrieved online at http://www.erlang.org/.

      Software distributed under the License is distributed on an "AS IS"
      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
      the License for the specific language governing rights and limitations
      under the License.

    </legalnotice>

    <title>snmpa</title>
    <prepared></prepared>
    <responsible></responsible>
    <docno></docno>
    <approved></approved>
    <checked></checked>
    <date></date>
    <rev></rev>
    <file>snmpa.xml</file>
  </header>
  <module>snmpa</module>
  <modulesummary>Interface Functions to the SNMP toolkit agent</modulesummary>
  <description>
    <p>The module <c>snmpa</c> contains interface functions to the 
      SNMP agent.</p>

    <marker id="data_types"></marker>
  </description>

  <section>
    <title>DATA TYPES</title>
    <code type="none"><![CDATA[
oid() = [byte()] 
atl_type() = read | write | read_write
notification_delivery_info() = #snmpa_notification_delivery_info{}
    ]]></code>

    <p>The <c>oid()</c> type is used to represent an ASN.1 OBJECT IDENTIFIER. </p>

    <p>The record <c><![CDATA[snmpa_notification_delivery_info]]></c> contains the following fields: </p>
    <taglist>
      <tag><c><![CDATA[tag = term()]]></c></tag>
      <item>
        <p>A user defined identity representing this notification send 
          operation.</p>
      </item>
      <tag><c><![CDATA[mod = module()]]></c></tag>
      <item>
        <p>A module implementing the 
          <seealso marker="snmpa_notification_delivery_info_receiver">snmpa_notification_delivery_info_receiver</seealso> 
          behaviour. The info functions of this module will be called at 
          various stages of delivery. </p>
      </item>
      <tag><c><![CDATA[extra = term()]]></c></tag>
      <item>
        <p>This is any extra info the user wants to have supplied 
          when the functions in the callback module is called. </p>
      </item>
    </taglist>
    
    <marker id="add_agent_caps"></marker>
  </section>

  <funcs>
    <func>
      <name>add_agent_caps(SysORID, SysORDescr) -> SysORIndex</name>
      <fsummary>Add an AGENT-CAPABILITY definition to the agent</fsummary>
      <type>
        <v>SysORID = oid()</v>
        <v>SysORDescr = string()</v>
        <v>SysORIndex = integer()</v>
      </type>
      <desc>
        <p>This function can be used to add an AGENT-CAPABILITY
          statement to the sysORTable in the agent.  The table is
          defined in the SNMPv2-MIB.</p>
        <marker id="del_agent_caps"></marker>
      </desc>
    </func>

    <func>
      <name>del_agent_caps(SysORIndex) -> void()</name>
      <fsummary>Delete an AGENT-CAPABILITY definition from the agent</fsummary>
      <type>
        <v>SysORIndex = integer()</v>
      </type>
      <desc>
        <p>This function can be used to delete an AGENT-CAPABILITY
          statement to the sysORTable in the agent.  This table is
          defined in the SNMPv2-MIB. </p>

          <marker id="get_agent_caps"></marker>
      </desc>
    </func>

    <func>
      <name>get_agent_caps() -> [[SysORIndex, SysORID, SysORDescr, SysORUpTime]]</name>
      <fsummary>Return all AGENT-CAPABILITY definitions in the agent</fsummary>
      <type>
        <v>SysORIndex = integer()</v>
        <v>SysORId = oid()</v>
        <v>SysORDescr = string()</v>
        <v>SysORUpTime = integer()</v>
      </type>
      <desc>
        <p>Returns all AGENT-CAPABILITY statements in the sysORTable
          in the agent.  This table is defined in the SNMPv2-MIB. </p>

        <marker id="get"></marker>
      </desc>
    </func>

    <func>
      <name>get(Agent, Vars) -> Values | {error, Reason}</name>
      <name>get(Agent, Vars, Context) -> Values | {error, Reason}</name>
      <fsummary>Perform a get operation on the agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Vars = [oid()]</v>
        <v>Context = string()</v>
        <v>Values = [term()]</v>
        <v>Reason = {atom(), oid()}</v>
      </type>
      <desc>
        <p>Performs a GET operation on the agent.  All loaded MIB
          objects are visible in this operation.  The agent calls the
          corresponding instrumentation functions just as if it was a
          GET request coming from a manager. </p>
        <p>Note that the request specific parameters (such as 
          <seealso marker="#current_request_id">current_request_id</seealso>) 
          are not accessible for the instrumentation functions if this 
          function is used. </p>

          <marker id="get_next"></marker>
      </desc>
    </func>

    <func>
      <name>get_next(Agent, Vars) -> Values | {error, Reason}</name>
      <name>get_next(Agent, Vars, Context) -> Values | {error, Reason}</name>
      <fsummary>Perform a get-next operation on the agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Vars = [oid()]</v>
        <v>Context = string()</v>
        <v>Values = [{oid(), term()}]</v>
        <v>Reason = {atom(), oid()}</v>
      </type>
      <desc>
        <p>Performs a GET-NEXT operation on the agent.  All loaded MIB
          objects are visible in this operation.  The agent calls the
          corresponding instrumentation functions just as if it was a
          GET request coming from a manager. </p>
        <p>Note that the request specific parameters (such as 
          <c>snmpa:current_request_id/0</c> are not accessible for the 
          instrumentation functions if this function is used. </p>

        <marker id="backup"></marker>
        <!-- <marker id="get_symbolic_store_db"></marker> -->
      </desc>
    </func>

<!--
    <func>
      <name>get_symbolic_store_db() -> Db</name>
      <fsummary>Retrieve the symbolic store database reference</fsummary>
      <type>
        <v>Db = term()</v>
      </type>
      <desc>
        <p>Retrieve the symbolic store database reference. This is used 
          for faster access to the database using the functions: 
          <c>int_to_enum/3</c>, <c>enum_to_int/3</c>, <c>name_to_oid/2</c>, 
          <c>oid_to_name/2</c>. </p>

        <marker id="backup"></marker>
      </desc>
    </func>

-->
    <func>
      <name>backup(BackupDir) -> ok | {error, Reason}</name>
      <name>backup(Agent, BackupDir) -> ok | {error, Reason}</name>
      <fsummary>Backup agent data</fsummary>
      <type>
        <v>BackupDir = string()</v>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Backup persistent/permanent data handled by the agent
          (such as local-db, mib-data and vacm). </p>
        <p>Data stored by mnesia is not handled. </p>
        <p>BackupDir cannot be identical to DbDir. </p>

        <marker id="info"></marker>
      </desc>
    </func>
    <func>
      <name>info() -> [{Key, Value}]</name>
      <name>info(Agent) -> [{Key, Value}]</name>
      <fsummary>Return information about the agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Returns a list (a dictionary) containing information about
          the agent. Information includes loaded MIBs, registered
          sub-agents, some information about the memory allocation. </p>
        <p>As of version 4.4 the format of the info has been changed. 
          To convert the info to the old format, call the 
          <seealso marker="#old_info_format">old_info_format</seealso> 
          function. </p>

        <marker id="old_info_format"></marker>
      </desc>
    </func>

    <func>
      <name>old_info_format(NewInfo) -> OldInfo</name>
      <fsummary>Return information about the agent</fsummary>
      <type>
        <v>OldInfo = NewInfo = [{Key, Value}]</v>
      </type>
      <desc>
        <p>As of version 4.4 the format of the info has been changed. 
          This function is used to convert to the old (pre-4.4) info 
          format. </p>

        <marker id="load_mibs"></marker>
      </desc>
    </func>

    <func>
      <name>load_mibs(Mibs) -> ok | {error, Reason}</name>
      <name>load_mibs(Agent,Mibs) -> ok | {error, Reason}</name>
      <fsummary>Load MIBs into the agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Mibs = [MibName]</v>
        <v>MibName = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Loads <c>Mibs</c> into an agent.  If the agent cannot load
          all MIBs, it will indicate where loading was aborted.  The
          <c>MibName</c> is the name of the Mib, including the path to
          where the compiled mib is found.  For example,</p>
        <code type="none">
          Dir = code:priv_dir(my_app) ++ "/mibs/",
          snmpa:load_mibs(snmp_master_agent, [Dir ++ "MY-MIB"]).
        </code>

        <marker id="unload_mibs"></marker>
      </desc>
    </func>

    <func>
      <name>unload_mibs(Mibs) -> ok | {error, Reason}</name>
      <name>unload_mibs(Agent,Mibs) -> ok | {error, Reason}</name>
      <fsummary>Unload MIBs from the agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Mibs = [MibName]</v>
        <v>MibName = string()</v>
      </type>
      <desc>
        <p>Unloads MIBs into an agent.  If it cannot unload all MIBs,
          it will indicate where unloading was aborted. </p>

        <marker id="which_mibs"></marker>
      </desc>
    </func>

    <func>
      <name>which_mibs() -> Mibs</name>
      <name>which_mibs(Agent) -> Mibs</name>
      <fsummary>Get a list of all the loaded mibs</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Mibs = [{MibName, MibFile}]</v>
        <v>MibName = atom()</v>
        <v>MibFile = string()</v>
      </type>
      <desc>
        <p>Retrieve the list of all the mibs loaded into this agent. Default 
          is the master agent. </p>
                    
        <marker id="whereis_mib"></marker>
      </desc>
    </func>

    <func>
      <name>whereis_mib(MibName) -> {ok, MibFile} | {error, Reason}</name>
      <name>whereis_mib(Agent, MibName) -> {ok, MibFile} | {error, Reason}</name>
      <fsummary>Get the path to the mib file</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>MibName = atom()</v>
        <v>MibFile = string()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Get the full path to the (compiled) mib-file. </p>

        <marker id="current_request_id"></marker>
        <marker id="current_context"></marker>
        <marker id="current_community"></marker>
        <marker id="current_address"></marker>
      </desc>
    </func>

    <func>
      <name>current_request_id() -> {value, RequestId} | false</name>
      <name>current_context() -> {value, Context} | false</name>
      <name>current_community() -> {value, Community} | false</name>
      <name>current_address() -> {value, Address} | false</name>
      <fsummary>Get the request-id, context, community and address of the current request</fsummary>
      <type>
        <v>RequestId = integer()</v>
        <v>Context = string()</v>
        <v>Community = string()</v>
        <v>Address = term()</v>
      </type>
      <desc>
        <p>Get the request-id, context, community and address of the 
          request currently being processed by the agent. </p>
        <p>Note that these functions is intended to be called by the 
          instrumentation functions and <em>only</em> if they are 
          executed in the context of the agent process (e.g. it does 
          not work if called from a spawned process).</p>

        <marker id="enum_to_int"></marker>
      </desc>
    </func>

    <func>
      <name>enum_to_int(Name, Enum) -> {value, Int} | false</name>
      <name>enum_to_int(Db, Name, Enum) -> {value, Int} | false</name>
      <fsummary>Convert an enum value to an integer</fsummary>
      <type>
        <v>Db   = term()</v>
        <v>Name = atom()</v>
        <v>Enum = atom()</v>
        <v>Int  = int()</v>
      </type>
      <desc>
        <p>Converts the symbolic value <c>Enum</c> to the
          corresponding integer of the enumerated object or type
          <c>Name</c> in a MIB.  The MIB must be loaded. 
          </p>
        <p><c>false</c> is returned if the object or type is not
          defined in any loaded MIB, or if it does not define the
          symbolic value as enumerated.
          </p>
        <p><c>Db</c> is a reference to the symbolic store database 
          (retrieved by a call to <c>get_symbolic_store_db/0</c>). </p>

        <marker id="int_to_enum"></marker>
      </desc>
    </func>

    <func>
      <name>int_to_enum(Name, Int) -> {value, Enum} | false</name>
      <name>int_to_enum(Db, Name, Int) -> {value, Enum} | false</name>
      <fsummary>Convert an integer to an enum value</fsummary>
      <type>
        <v>Db   = term()</v>
        <v>Name = atom()</v>
        <v>Int  = int()</v>
        <v>Enum = atom()</v>
      </type>
      <desc>
        <p>Converts the integer <c>Int</c> to the corresponding
          symbolic value of the enumerated object or type <c>Name</c> in
          a MIB.  The MIB must be loaded. 
          </p>
        <p><c>false</c> is returned if the object or type is not
          defined in any loaded MIB, or if it does not define the
          symbolic value as enumerated.
          </p>
        <p><c>Db</c> is a reference to the symbolic store database 
          (retrieved by a call to <c>get_symbolic_store_db/0</c>). </p>

        <marker id="name_to_oid"></marker>
      </desc>
    </func>

    <func>
      <name>name_to_oid(Name) -> {value, oid()} | false</name>
      <name>name_to_oid(Db, Name) -> {value, oid()} | false</name>
      <fsummary>Convert a symbolic name to an OID</fsummary>
      <type>
        <v>Db   = term()</v>
        <v>Name = atom()</v>
      </type>
      <desc>
        <p>Looks up the OBJECT IDENTIFIER of a MIB object, given the
          symbolic name.  Note, the OBJECT IDENTIFIER is given for the
          object, not for an instance. </p>
        <p><c>false</c> is returned if the object is not defined in any
          loaded MIB. </p>
        <p><c>Db</c> is a reference to the symbolic store database 
          (retrieved by a call to <c>get_symbolic_store_db/0</c>). </p>

        <marker id="oid_to_name"></marker>
      </desc>
    </func>

    <func>
      <name>oid_to_name(OID) -> {value, Name} | false</name>
      <name>oid_to_name(Db, OID) -> {value, Name} | false</name>
      <fsummary>Convert an OID to a symbolic name</fsummary>
      <type>
        <v>Db   = term()</v>
        <v>OID  = oid()</v>
        <v>Name = atom()</v>
      </type>
      <desc>
        <p>Looks up the symbolic name of a MIB object, given OBJECT
          IDENTIFIER. </p>
        <p><c>false</c> is returned if the object is not defined in any
          loaded MIB. </p>
        <p><c>Db</c> is a reference to the symbolic store database 
          (retrieved by a call to <c>get_symbolic_store_db/0</c>). </p>

        <marker id="which_aliasnames"></marker>
      </desc>
    </func>

    <func>
      <name>which_aliasnames() -> Result</name>
      <fsummary>Get all alias-names known to the agent</fsummary>
      <type>
        <v>Result = [atom()]</v>
      </type>
      <desc>
        <p>Retrieve all alias-names known to the agent.</p>
        <marker id="which_tables"></marker>
      </desc>
    </func>

    <func>
      <name>which_tables() -> Result</name>
      <fsummary>Get all tables known to the agent</fsummary>
      <type>
        <v>Result = [atom()]</v>
      </type>
      <desc>
        <p>Retrieve all tables known to the agent.</p>

        <marker id="which_variables"></marker>
      </desc>
    </func>

    <func>
      <name>which_variables() -> Result</name>
      <fsummary>Get all variables known to the agent</fsummary>
      <type>
        <v>Result = [atom()]</v>
      </type>
      <desc>
        <p>Retrieve all variables known to the agent.</p>

        <marker id="which_notifications"></marker>
      </desc>
    </func>

    <func>
      <name>which_notifications() -> Result</name>
      <fsummary>Get all notifications known to the agent</fsummary>
      <type>
        <v>Result = [{Name, MibName, Info}]</v>
        <v>Name = atom()</v>
        <v>MibName = atom()</v>
        <v>Info = term()</v>
      </type>
      <desc>
        <p>Retrieve all notifications (and traps) known to the agent.</p>

        <marker id="log_to_txt"></marker>
      </desc>
    </func>

    <func>
      <name>log_to_txt(LogDir, Mibs)</name>
      <name>log_to_txt(LogDir, Mibs, OutFile) -> ok | {error, Reason}</name>
      <name>log_to_txt(LogDir, Mibs, OutFile, LogName) ->  ok | {error, Reason}</name>
      <name>log_to_txt(LogDir, Mibs, OutFile, LogName, LogFile) ->  ok | {error, Reason}</name>
      <name>log_to_txt(LogDir, Mibs, OutFile, LogName, LogFile, Start) ->  ok | {error, Reason}</name>
      <name>log_to_txt(LogDir, Mibs, OutFile, LogName, LogFile, Start, Stop)  -> ok | {error, Reason}</name>
      <fsummary>Convert an Audit Trail Log to text format</fsummary>
      <type>
        <v>LogDir = string()</v>
        <v>Mibs = [MibName]</v>
        <v>MibName = string()</v>
        <v>OutFile = string()</v>
        <v>LogName = string()</v>
        <v>LogFile = string()</v>
        <v>Start = Stop = null | datetime() | {local_time,datetime()} |  {universal_time,datetime()} </v>
        <v>Reason = disk_log_open_error() | file_open_error() | term()</v>
        <v>disk_log_open_error() = {LogName, term()}</v>
        <v>file_open_error() = {OutFile, term()}</v>
      </type>
      <desc>
        <p>Converts an Audit Trail Log to a readable text file. 
          <c>OutFile</c> defaults to "./snmpa_log.txt". 
          <c>LogName</c> defaults to "snmpa_log". 
          <c>LogFile</c> defaults to "snmpa.log". 
          See <seealso marker="snmp#log_to_txt">snmp:log_to_txt</seealso> 
          for more info.</p>

        <marker id="change_log_size"></marker>
      </desc>
    </func>

    <func>
      <name>change_log_size(NewSize) -> ok | {error, Reason}</name>
      <fsummary>Change the size of the Audit Trail Log</fsummary>
      <type>
        <v>NewSize = {MaxBytes, MaxFiles}</v>
        <v>MaxBytes = integer()</v>
        <v>MaxFiles = integer()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Changes the log size of the Audit Trail Log. The application must 
          be configured to use the audit trail log function. Please refer to 
          disk_log(3) in Kernel Reference Manual for a description of how to 
          change the log size. </p>
        <p>The change is permanent, as long as the log is not deleted. 
          That means, the log size is remembered across reboots. </p>

        <marker id="set_log_type"></marker>
      </desc>
    </func>

    <func>
      <name>set_log_type(NewType) -> {ok, OldType} | {error, Reason}</name>
      <name>set_log_type(Agent, NewType) -> {ok, OldType} | {error, Reason}</name>
      <fsummary>Change the type of the Audit Trail Log</fsummary>
      <type>
        <v>NewType = OldType = atl_type()</v>
        <v>Agent = pid() | atom()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Changes the run-time Audit Trail log type. </p>
        <p>Note that this has no effect on the application configuration as
          defined by configuration files, so a node restart will revert the 
          config to whatever is in those files. </p>
        <p>This function is primarily useful in testing/debugging 
          scenarios. </p>

        <marker id="mib_of"></marker>
      </desc>

    </func>

    <func>
      <name>mib_of(Oid) -> {ok, MibName} | {error, Reason}</name>
      <name>mib_of(Agent, Oid) -> {ok, MibName} | {error, Reason}</name>
      <fsummary>Which mib an Oid belongs to</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Oid = oid()</v>
        <v>MibName = atom()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Finds the mib corresponding to the <c>Oid</c>. If it is a
          variable, the Oid must be 
          &lt;Oid for var&gt;.0 and if it is a table, Oid must be 
          &lt;table&gt;.&lt;entry&gt;.&lt;col&gt;.&lt;any&gt;</p>

        <marker id="me_of"></marker>
      </desc>
    </func>

    <func>
      <name>me_of(Oid) -> {ok, Me} | {error, Reason}</name>
      <name>me_of(Agent, Oid) -> {ok, Me} | {error, Reason}</name>
      <fsummary>Retrieve the mib-entry of an Oid</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Oid = oid()</v>
        <v>Me = #me{}</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Finds the mib entry corresponding to the <c>Oid</c>. If it is a
          variable, the Oid must be 
          &lt;Oid for var&gt;.0 and if it is a table, Oid must be 
          &lt;table&gt;.&lt;entry&gt;.&lt;col&gt;.&lt;any&gt;</p>

        <marker id="invalidate_mibs_cache"></marker>
      </desc>
    </func>

    <func>
      <name>invalidate_mibs_cache() -> void()</name>
      <name>invalidate_mibs_cache(Agent) -> void()</name>
      <fsummary>Invalidate the mib server cache</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Invalidate the mib server cache. </p>
        <p>The entire contents of the cache will be deleted. </p>

        <marker id="enable_mibs_cache"></marker>
      </desc>
    </func>

    <func>
      <name>enable_mibs_cache() -> void()</name>
      <name>enable_mibs_cache(Agent) -> void()</name>
      <fsummary>Enable the mib server cache</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Enable the mib server cache. </p>

        <marker id="disable_mibs_cache"></marker>
      </desc>
    </func>

    <func>
      <name>disable_mibs_cache() -> void()</name>
      <name>disable_mibs_cache(Agent) -> void()</name>
      <fsummary>Disable the mib server cache</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Disable the mib server cache. </p>

        <marker id="which_mibs_cache_size"></marker>
      </desc>
    </func>

    <func>
      <name>which_mibs_cache_size() -> void()</name>
      <name>which_mibs_cache_size(Agent) -> void()</name>
      <fsummary>The size of the mib server cache</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Retreive the size of the mib server cache. </p>

        <marker id="gc_mibs_cache"></marker>
      </desc>
    </func>

    <func>
      <name>gc_mibs_cache() -> {ok, NumElementsGCed} | {error, Reason}</name>
      <name>gc_mibs_cache(Agent) -> {ok, NumElementsGCed} | {error, Reason}</name>
      <name>gc_mibs_cache(Age) -> {ok, NumElementsGCed} | {error, Reason}</name>
      <name>gc_mibs_cache(Agent, Age) -> {ok, NumElementsGCed} | {error, Reason}</name>
      <name>gc_mibs_cache(Age, GcLimit) -> {ok, NumElementsGCed} | {error, Reason}</name>
      <name>gc_mibs_cache(Agent, Age, GcLimit) -> {ok, NumElementsGCed} | {error, Reason}</name>
      <fsummary>Perform mib server cache gc</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Age = integer() > 0</v>
        <v>GcLimit = integer() > 0 | infinity</v>
        <v>NumElementsGCed = integer() >= 0</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Perform mib server cache gc. </p>
        <p>Manually performs a mib server cache gc. 
          This can be done regardless of the value of the 
          <c>autogc</c> option. 
          The <c>NumElementsGCed</c> value indicates how many 
          elements where actually removed from the cache. </p>

        <marker id="enable_mibs_cache_autogc"></marker>
      </desc>
    </func>

    <func>
      <name>enable_mibs_cache_autogc() -> void()</name>
      <name>enable_mibs_cache_autogc(Agent) -> void()</name>
      <fsummary>Enable automatic gc of the mib server cache</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Enable automatic gc of the mib server cache. </p>

        <marker id="disable_mibs_cache_autogc"></marker>
      </desc>
    </func>

    <func>
      <name>disable_mibs_cache_autogc() -> void()</name>
      <name>disable_mibs_cache_autogc(Agent) -> void()</name>
      <fsummary>Disable automatic gc of the mib server cache</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Disable automatic gc of the mib server cache. </p>

        <marker id="update_mibs_cache_age"></marker>
      </desc>
    </func>

    <func>
      <name>update_mibs_cache_age(NewAge) -> ok | {error, Reason}</name>
      <name>update_mibs_cache_age(Agent, NewAge) -> ok | {error, Reason}</name>
      <fsummary>Change the mib server cache age property</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>NewAge = integer() > 0</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Change the mib server cache <c>age</c> property. </p>

        <marker id="update_mibs_cache_gclimit"></marker>
      </desc>
    </func>

    <func>
      <name>update_mibs_cache_gclimit(NewGcLimit) -> ok | {error, Reason}</name>
      <name>update_mibs_cache_gclimit(Agent, NewGCLimit) -> ok | {error, Reason}</name>
      <fsummary>Change the mib server cache gclimit property</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>NewGcLimit = integer() > 0 | infinity</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Change the mib server cache <c>gclimit</c> property. </p>

        <marker id="register_notification_filter"></marker>
      </desc>
    </func>


    <func>
      <name>register_notification_filter(Id, Mod, Data) -> ok | {error, Reason}</name>
      <name>register_notification_filter(Agent, Id, Mod, Data) -> ok | {error, Reason}</name>
      <name>register_notification_filter(Id, Mod, Data, Where) -> ok | {error, Reason}</name>
      <name>register_notification_filter(Agent, Id, Mod, Data, Where) -> ok | {error, Reason}</name>
      <fsummary>Register a notification filter</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Id = filter_id()</v>
        <v>filter_id() = term()</v>
        <v>Mod = atom()</v>
        <v>Data = term()</v>
        <v>Where = filter_position()</v>
        <v>Reason = term()</v>
        <v>filter_position() = first | last | {insert_before, filter_id()} | {insert_after, filter_id()} </v>
      </type>
      <desc>
        <p>Registers a notification filter.
          </p>
        <p><c>Mod</c> is a module implementing the 
          <c>snmpa_notification_filter</c> behaviour.</p>
        <p><c>Data</c> will be passed on to the filter when calling the
          functions of the behaviour.</p>

        <marker id="unregister_notification_filter"></marker>
      </desc>
    </func>

    <func>
      <name>unregister_notification_filter(Id) -> ok | {error, Reason}</name>
      <name>unregister_notification_filter(Agent, Id) -> ok | {error, Reason}</name>
      <fsummary>Unregister a notification filter</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Id = filter_id()</v>
        <v>filter_id() = term()</v>
      </type>
      <desc>
        <p>Unregister a notification filter. </p>

        <marker id="which_notification_filter"></marker>
      </desc>
    </func>

    <func>
      <name>which_notification_filter() -> Filters</name>
      <name>which_notification_filter(Agent) -> Filters</name>
      <fsummary>Which notification filter</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Filters = [filter_id()]</v>
        <v>filter_id() = term()</v>
      </type>
      <desc>
        <p>List all notification filters in an agent.</p>

        <marker id="set_request_limit"></marker>
      </desc>
    </func>

   <func>
      <name>set_request_limit(NewLimit) -> {ok, OldLimit} | {error, Reason}</name>
      <name>set_request_limit(Agent, NewLimit) -> {ok, OldLimit} | {error, Reason}</name>
      <fsummary>Change the request limit</fsummary>
      <type>
        <v>NewLimit = OldLimit = infinity | integer() >= 0</v>
        <v>Agent = pid() | atom()</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Changes the request limit. </p>
        <p>Note that this has no effect on the application configuration as
          defined by configuration files, so a node restart will revert the 
          config to whatever is in those files. </p>
        <p>This function is primarily useful in load regulation 
          scenarios. </p>

        <marker id="register_subagent"></marker>
      </desc>
    </func>

    <func>
      <name>register_subagent(Agent, SubTreeOid, Subagent) -> ok | {error, Reason}</name>
      <fsummary>Register a sub-agent under a sub-tree</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>SubTreeOid = oid()</v>
        <v>SubAgent = pid()</v>
      </type>
      <desc>
        <p>Registers a sub-agent under a sub-tree of another agent. </p>
        <p>It is easy to make mistakes when registering sub-agents and
          this activity should be done carefully.  For example, a
          strange behaviour would result from the following
          configuration:</p>
        <pre>
snmp_agent:register_subagent(MAPid,[1,2,3,4],SA1),
snmp_agent:register_subagent(SA1,[1,2,3], SA2).
        </pre>
        <p><c>SA2</c> will not get requests starting with object
          identifier <c>[1,2,3]</c> since <c>SA1</c> does not. </p>

        <marker id="unregister_subagent"></marker>
      </desc>
    </func>

    <func>
      <name>unregister_subagent(Agent, SubagentOidOrPid) -> ok | {ok, SubAgentPid} | {error, Reason}</name>
      <fsummary>Unregister a sub-agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>SubTreeOidorPid = oid() | pid()</v>
      </type>
      <desc>
        <p>Unregister a sub-agent.  If the second argument is a pid,
          then that sub-agent will be unregistered from all trees in
          <c>Agent</c>. </p>

          <marker id="send_notification2"></marker>
      </desc>
    </func>


    <func>
      <name>send_notification2(Agent, Notification, SendOpts) -> void()</name>
      <fsummary>Send notification</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Notification = atom()</v>
        <v>SendOpts = [send_option()]</v>
        <v>send_option() = {receiver, receiver()} | {name, notify_name()} | {context, context_name()} | {varbinds, varbinds()} | {local_engine_id, string()} | {extra, extra_info()}</v>
        <v>receiver() = no_receiver | {tag(), tag_receiver()} | notification_delivery_info()</v>
        <v>tag() = term(()</v>
        <v>tag_receiver() = pid() | registered_name() | {Mod, Func, Args}</v>
        <v>registered_name() = atom()</v>
        <v>Mod = atom()</v>
        <v>Func = atom()</v>
        <v>Args = list()</v>
        <v>notify_name() = string()</v>
        <v>context_name() = string()</v>
        <v>varbinds() = [varbind()]</v>
        <v>varbind() = {variable(), value()} | {column(), row_index(), value()} | {oid(), value()}</v>
        <v>variable() = atom()</v>
        <v>value() = term()</v>
        <v>column() = atom()</v>
        <v>row_index() = [int()]</v>
        <v>extra_info() = term()</v>
      </type>
      <desc>
        <p>Send the notification <c>Notification</c> to the management 
	targets defined for notify-name (<c>name</c>) in the 
	<c>snmpNotifyTable</c> in SNMP-NOTIFICATION-MIB from the 
	specified <c>context</c>. </p>

	<p>If no <c>name</c> is specified (or if it is <c>""</c>), the
	notification is sent to all management targets. </p>

	<p>If no <c>context</c> is specified, the default context, <c>""</c>, 
	is used. </p>

        <p>The send option <c>receiver</c> specifies where information
	about delivery of Inform-Requests should be sent.  The agent
	sends Inform-Requests and waits for acknowledgments from the
	management targets. 
	The <c>receiver</c> can have three values: </p>

	<list type="bulleted">
          <item>
            <p><c>no_receiver</c> - No information is delivered. </p>
	  </item>

          <item>
	    <p><c>notification_delivery_info()</c> - The information is 
	    delivered via a function call according to this data. See the 
	    <seealso marker="#data_types">DATA TYPES</seealso> section 
	    above for details. </p>
	  </item>

          <item>
            <p><c>{tag(), tag_receiver()}</c> - The information is delivered 
	    either via messages or via a function call according to the value 
	    of <c>tag_receiver()</c>. </p>
	    <p>Delivery is done differently depending on the value
	    of <c>tag_receiver()</c>: </p>

	    <list>
	      <item>
		<p><c>pid() | registered_name()</c> - The info will be delivered in  
		the following messages: </p>
		<list>
		  <item>
		    <p><c>{snmp_targets, tag(), Addresses}</c></p>
		    <p>This informs the user which target addresses the 
		    notification was sent to. </p>
		  </item>
		  <item>
		    <p><c>{snmp_notification, tag(), {got_response, Address}}</c></p>
		    <p>This informs the user that this target address 
		    acknowledged the notification. </p>
		  </item>
		  <item>
		    <p><c>{snmp_notification, tag(), {no_response, Address}}</c></p>
		    <p>This informs the user that this target address 
		    did not acknowledge the notification. </p>
		  </item>
		</list>
		<p>The notification is sent as an Inform-Request to each 
		target address in <c>Addresses</c> and if there are no 
		targets for which an Inform-Request is sent, <c>Addresses</c> 
		is the empty list <c>[]</c>. </p>
		<p>The <c>tag_receiver()</c> will first be sent the 
		<c>snmp_targets</c> message, and then for each address in 
		<c>Addresses</c> list, one of the two <c>snmp_notification</c> 
		messages. </p>
	      </item>

	      <item>
		<p><c>{Mod, Func, Args}</c> - The info will be delivered via
		the function call: </p>
		<p><c>Mod:Func([Msg | Args])</c></p>
		<p>where <c>Msg</c> has the same content and purpose as the 
		messages descrived above.</p>
	      </item>

	    </list>
	  </item>
        </list>

	<note>
	  <p>The <c>extra</c> info is not normally interpreted by the agent, 
	  instead it is passed through to the 
	  <seealso marker="snmp_agent_netif">net-if</seealso> process. It is 
	  up to the implementor of that process to make use of this data. </p>
	  <p>The version of net-if provided by this application makes no use
	  of this data, with one exception: 
	  Any tuple containing the atom 
	  <c>snmpa_default_notification_extra_info</c> 
	  may be used by the agent and is therefor <em>reserved</em>. </p>
	  <p>See the net-if incomming messages for sending a 
	  <seealso marker="snmp_agent_netif#im_send_pdu">
	  trap</seealso> and 
	  <seealso marker="snmp_agent_netif#im_send_pdu_req">
	  notification</seealso> for more info. </p>
	</note>

	<marker id="send_notification"></marker>
      </desc>
    </func>


    <func>
      <name>send_notification(Agent, Notification, Receiver)</name>
      <name>send_notification(Agent, Notification, Receiver, Varbinds)</name>
      <name>send_notification(Agent, Notification, Receiver, NotifyName, Varbinds)</name>
      <name>send_notification(Agent, Notification, Receiver, NotifyName, ContextName, Varbinds) -> void() </name>
      <name>send_notification(Agent, Notification, Receiver, NotifyName, ContextName, Varbinds, LocalEngineID) -> void() </name>
      <fsummary>Send a notification</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
        <v>Notification = atom()</v>
        <v>Receiver = no_receiver | {Tag, Recv} | notification_delivery_info()</v>
        <v>Tag = term()</v>
        <v>Recv = receiver()</v>
        <v>receiver() = pid() | atom() | {Mod, Func, Args}</v>
        <v>Mod = atom()</v>
        <v>Func = atom()</v>
        <v>Args = list()</v>
        <v>NotifyName = string()</v>
        <v>ContextName = string()</v>
        <v>Varbinds = varbinds()</v>
        <v>varbinds() = [varbind()]</v>
        <v>varbind() = {Variable, Value} | {Column, RowIndex, Value} | {OID, Value}</v>
        <v>Variable = atom()</v>
        <v>Column = atom()</v>
        <v>OID = oid()</v>
        <v>Value = term()</v>
        <v>RowIndex = [int()]</v>
        <v>LocalEngineID = string()</v>
      </type>
      <desc>
        <p>Sends the notification <c>Notification</c> to the
	management targets defined for <c>NotifyName</c> in the
	<c>snmpNotifyTable</c> in SNMP-NOTIFICATION-MIB from the
	specified context.  </p>
	<p>If no <c>NotifyName</c> is specified (or if it is <c>""</c>), 
	the notification is sent to all management targets 
	(<c>Addresses</c> below).  </p>
	<p>If no <c>ContextName</c> is specified, the default <c>""</c> 
	context is used. </p>

        <p>The parameter <c>Receiver</c> specifies where information
	about delivery of Inform-Requests should be sent.  The agent
	sends Inform-Requests and waits for acknowledgments from the
	managers. <c>Receiver</c> can have three values: </p>

	<list type="bulleted">
          <item>
            <p><c>no_receiver</c> - No information is delivered. </p>
	  </item>

          <item>
            <p><c>notification_delivery_info()</c> - The information is 
              delivered via a function call according to this data. See the 
              <seealso marker="#data_types">DATA TYPES</seealso> section 
              above for details. </p>
	  </item>

          <item>
            <p><c>{Tag, Recv}</c> - The information is delivered either via 
	    messages or via a function call according to the value of 
	    <c>Recv</c>. </p>
	  </item>

        </list>


        <p>If <c>Receiver</c> has the value <c>{Tag, Recv}</c>, the delivery is
          done according to <c>Recv</c>: </p>

        <list>
          <item>
            <p><c>pid() | atom()</c> - The info will be delivered in  
              the following messages: </p>
            <list>
              <item>
                <p><c>{snmp_targets, Tag, Addresses}</c></p>
                <p>This inform the user which target addresses the 
                  notification was sent to. </p>
		  </item>
              <item>
                <p><c>{snmp_notification, Tag, {got_response, Address}}</c></p>
                <p>This informs the user that this target address 
                  acknowledged the notification. </p>
		  </item>
              <item>
                <p><c>{snmp_notification, Tag, {no_response, Address}}</c></p>
                <p>This informs the user that this target address 
                  did not acknowledge notification. </p>
		  </item>
		</list>
            <p>The notification is sent as an Inform-Request to each 
              target address in <c>Addresses</c> and if there are no 
              targets for which an Inform-Request is sent, <c>Addresses</c> 
              is the empty list <c>[]</c>. </p>
            <p>The <c>receiver</c> will first be sent the <c>snmp_targets</c> 
              message, and then for each address in <c>Addresses</c> list, 
              one of the two <c>snmp_notification</c> messages. </p>
	  </item>
          <item>
            <p><c>{Mod, Func, Args}</c> - The info will be delivered via
              the function call: </p>
            <p><c>Mod:Func([Msg | Args])</c></p>
            <p>where <c>Msg</c> has the same content and purpose as the 
              messages descrived above.</p>
	  </item>
	</list>

        <p><c>Address</c> is a management target address and <c>Addresses</c> is a 
          list of management target addresses. They are defined as followes: </p>

<pre>
        Addresses  = [address()]
        Address    = address()
        address()  = v1_address() | v3_address()
        v1_address() = {TDomain, TAddress}
        v3_address() = {{TDomain, TAddress}, V3MsgData}
        TDomain    = tdoamin()
        TAddress   = taddress()
        tdomain()  = The oid of snmpUDPDomain 
                     This is the only supported transport domain.
        taddress() = [A1, A2, A3, A4, P1, P3]
                     The 4 first bytes makes up the IP-address and the last 2,
                     the UDP-port number.
        V3MsgData  = v3_msg_data()
        v3_msg_data() = term()
</pre>

        <p>If <c>Receiver</c> is a <c>notification_delivery_info()</c> record,
          then the information about the notification delivery will be delivered 
          to the <c>receiver</c> via the callback functions defined by the 
          <seealso marker="snmpa_notification_delivery_info_receiver">snmpa_notification_delivery_info_receiver</seealso> 
          behaviour according to the content of the <c>notification_delivery_info()</c> 
          record. </p>

        <p>The optional argument <c>Varbinds</c> defines
          values for the objects in the notification.  If no value is
          given for an object, the <c>Agent</c> performs a get-operation
          to retrieve the value.
          </p>
        <p><c>Varbinds</c> is a list of <c>Varbind</c>, where each
          <c>Varbind</c> is one of:
          </p>
        <list type="bulleted">
          <item><c>{Variable, Value}</c>, where <c>Variable</c> is the
           symbolic name of a scalar variable referred to in the notification
           specification.
          </item>
          <item><c>{Column, RowIndex, Value}</c>, where <c>Column</c>
           is the symbolic name of a column variable.
          <c>RowIndex</c> is a list of indices for the specified
           element.  If this is the case, the OBJECT IDENTIFIER sent
           in the notification is the <c>RowIndex</c> appended to the OBJECT
           IDENTIFIER for the table column. This is the OBJECT
           IDENTIFIER which specifies the element.
          </item>
          <item><c>{OID, Value}</c>, where <c>OID</c> is the OBJECT
           IDENTIFIER for an instance of an object, scalar variable,
           or column variable.
          </item>
        </list>
        <p>For example, to specify that <c>sysLocation</c> should have the
          value <c>"upstairs"</c> in the notification, we could use one of:
          </p>
        <list type="bulleted">
          <item><c>{sysLocation, "upstairs"}</c> or</item>
          <item><c>{[1,3,6,1,2,1,1,6,0], "upstairs"}</c> or</item>
          <item><c>{?sysLocation_instance, "upstairs"}</c> (provided
           that the generated <c>.hrl</c> file is included)</item>
        </list>

        <p>If a variable in the notification is a table element, the
          <c>RowIndex</c> for the element must be given in the
          <c>Varbinds</c> list. In this case, the OBJECT IDENTIFIER sent
          in the notification is the OBJECT IDENTIFIER that identifies this
          element.  This OBJECT IDENTIFIER could be used in a get
          operation later.
          </p>

        <p>This function is asynchronous, and does not return any
          information.  If an error occurs, <c>user_err/2</c> of the error
          report module is called and the notification is discarded.
          </p>

        <note>
          <p>Note that the use of the LocalEngineID argument is only intended 
            for special cases, if the agent is to "emulate" multiple EngineIDs!
            By default, the agent uses the value of <c>SnmpEngineID</c> 
            (see SNMP-FRAMEWORK-MIB). </p>
	</note>

        <p><c>ExtraInfo</c> is not normally used in any way by the agent. 
	It is intended to be passed along to the net-if process, which is
	a component that a user can implement themself. The users own net-if
	may then make use of ExtraInfo. The net-if provided with this 
	application does not process ExtraInfo. </p>
	<p>There is one exception. <em>Any</em> tuple containing the atom
	<c>snmpa_default_notification_extra_info</c> will, in this context,
	be considered belonging to this application, and may be processed
	by the agent. </p>

	<marker id="discovery"></marker>
      </desc>
    </func>


    <func>
      <name>discovery(TargetName, Notification) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <name>discovery(TargetName, Notification, Varbinds) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <name>discovery(TargetName, Notification, DiscoHandler) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <name>discovery(TargetName, Notification, ContextName, Varbinds) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <name>discovery(TargetName, Notification, Varbinds, DiscoHandler) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <name>discovery(TargetName, Notification, ContextName, Varbinds, DiscoHandler) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <name>discovery(TargetName, Notification, ContextName, Varbinds, DiscoHandler, ExtraInfo) -> {ok, ManagerEngineID} | {error, Reason}</name>
      <fsummary>Initiate the discovery process with a manager</fsummary>
      <type>
        <v>TargetName = string()</v>
        <v>Notification = atom()</v>
        <v>ContextName = string() (defaults to "")</v>
        <v>Varbinds = varbinds()</v>
        <v>varbinds() = [varbind()]</v>
        <v>DiscoHandler = snmpa_discovery_handler()</v>
        <v>ExtraInfo = term()</v>
        <v>snmpa_discovery_handler() = Module implementing the snmpa_discovery_handler behaviour</v>
        <v>ManagerEngineID = string()</v>
        <v>varbind() = {Variable, Value} | {Column, RowIndex, Value} | {OID, Value}</v>
        <v>Variable = atom()</v>
        <v>Column = atom()</v>
        <v>OID = oid()</v>
        <v>Value = term()</v>
        <v>RowIndex = [int()]</v>
        <v>Reason = term()</v>
      </type>
      <desc>
        <p>Initiate the discovery process with the manager identified by
          <c>TargetName</c> using the notification <c>Notification</c>. </p>

        <p>This function is synchronous, which means that it will return when
          the discovery process has been completed or failed. </p>

        <p>The <c>DiscoHandler</c> module is used during the discovery 
          process. See 
          <seealso marker="snmpa_discovery_handler">discovery handler</seealso>
          for more info. </p>

        <p>The <c>ExtraInfo</c> argument is passed on to the callback functions
          of the <c>DiscoHandler</c>. </p>

        <note><p>If we are not at security-level <c>noAuthNoPriv</c>,
          this could be complicated, since the agent will then continue 
          with stage 2, before which the usm-related updates must be 
          done. </p></note>

        <note><p>The default discovery handler will require 
          additional actions by the caller and the discovery will not work
          if the security-level is higher then <c>noAuthNoPriv</c>. </p></note>

          <marker id="convert_config"></marker>
      </desc>
    </func>

    <func>
      <name>convert_config(OldConfig) -> AgentConfig</name>
      <fsummary>Convert old snmp config to new agent config</fsummary>
      <type>
        <v>OldConfig = list()</v>
        <v>AgentConfig = list()</v>
      </type>
      <desc>
        <p>This off-line utility function can be used to convert
          the old snmp application config (pre snmp-4.0) to the 
          new snmp agent config (as of snmp-4.0).</p>
        <p>For information about the old config (<c>OldConfig</c>) 
          see the OTP R9C documentation.</p>
        <p>For information about the current agent config 
          (<c>AgentConfig</c>), see either
          the <seealso marker="snmp_app">SNMP application</seealso> 
          part of the reference manual or the 
          <seealso marker="snmp_config">Configuring the application</seealso> 
          chapter of the SNMP user's guide.</p>

        <marker id="restart_worker"></marker>
      </desc>
    </func>

    <func>
      <name>restart_worker() -> void()</name>
      <name>restart_worker(Agent) -> void()</name>
      <fsummary>Restart the worker process of a multi-threaded agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Restart the worker process of a multi-threaded agent.</p>
        <p>This is a utility function, that can be useful when
          e.g. debugging instrumentation functions.</p>

        <marker id="restart_set_worker"></marker>
      </desc>
    </func>

    <func>
      <name>restart_set_worker() -> void()</name>
      <name>restart_set_worker(Agent) -> void()</name>
      <fsummary>Restart the set worker process of a multi-threaded agent</fsummary>
      <type>
        <v>Agent = pid() | atom()</v>
      </type>
      <desc>
        <p>Restart the set worker process of a multi-threaded agent.</p>
        <p>This is a utility function, that can be useful when
          e.g. debugging instrumentation functions.</p>

        <marker id="print_mib_info"></marker>
      </desc>
    </func>

    <func>
      <name>print_mib_info() -> void()</name>
      <fsummary>Print mib info</fsummary>
      <desc>
        <p>Prints the content of all the (snmp) tables and variables 
	for all mibs handled by the snmp agent. </p>

        <marker id="print_mib_tables"></marker>
      </desc>
    </func>

    <func>
      <name>print_mib_tables() -> void()</name>
      <fsummary>Print mib tables</fsummary>
      <desc>
        <p>Prints the content of all the (snmp) tables 
	for all mibs handled by the snmp agent. </p>

        <marker id="print_mib_variables"></marker>
      </desc>
    </func>

    <func>
      <name>print_mib_variables() -> void()</name>
      <fsummary>Print mib variables</fsummary>
      <desc>
        <p>Prints the content of all the (snmp) variables 
	for all mibs handled by the snmp agent. </p>

        <marker id="verbosity"></marker>
      </desc>
    </func>

    <func>
      <name>verbosity(Ref,Verbosity) -> void()</name>
      <fsummary>Assign a new verbosity for the process</fsummary>
      <type>
        <v>Ref = pid() | sub_agents | master_agent | net_if | mib_server | symbolic_store | note_store | local_db</v>
        <v>Verbosity = verbosity() | {subagents, verbosity()}</v>
        <v>verbosity() = silence | info | log | debug | trace </v>
      </type>
      <desc>
        <p>Sets verbosity for the designated process. For the lowest 
          verbosity <c>silence</c>, nothing is printed. The higher the
          verbosity, the more is printed. </p>
      </desc>
    </func>
  </funcs>

  <section>
    <title>See Also</title>
    <p>calendar(3), erlc(1) </p>
  </section>

  
</erlref>