aboutsummaryrefslogtreecommitdiffstats
path: root/lib/snmp/doc/src/notes.xml
blob: dc2d879672ab7538ecc962285e613d5e42695ba1 (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
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
<?xml version="1.0" encoding="latin1" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">

<chapter>
  <header>
    <copyright>
      <year>1996</year><year>2010</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>SNMP Release Notes</title>
    <prepared></prepared>
    <responsible></responsible>
    <docno></docno>
    <approved></approved>
    <checked></checked>
    <date></date>
    <rev></rev>
    <file>notes.xml</file>
  </header>

  <section>
    <title>SNMP Development Toolkit 4.16</title>
    <p>Version 4.16 supports code replacement in runtime from/to
      version 4.15, 4.14 and 4.13.5.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->
      <list type="bulleted">
        <item>
          <p>[agent|manager] Entries in the audit trail log can now be 
            augmented by a sequence number. </p>
          <p>This is enabled by the <c>seqno</c> option, which is part of the 
            <seealso marker="snmp_config#audit_trail_log">Audit Trail Log</seealso> 
            config option. </p>
          <p>See the 
            <seealso marker="snmp_app#configuration_params">reference manual</seealso> 
            or the 
            <seealso marker="snmp_config#configuration_params">Configuring the application</seealso> 
            chapter of the User's Guide for further info. </p> 

          <p>Own Id: OTP-8395</p>
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->

      <list type="bulleted">
        <item>
          <p>The config utility 
            (<seealso marker="snmp#config">snmp:config/0</seealso>)
            generated a default notify.conf 
            with a bad name for the starndard trap entry (was "stadard trap", 
            but should have been "standard trap"). This has been corrected. </p>
          <p>Kenji Rikitake</p>
          <p>Own Id: OTP-8433</p>
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.16 -->


  <section>
    <title>SNMP Development Toolkit 4.15</title>

    <p>Version 4.15 supports code replacement in runtime from/to
      version 4.14 and 4.13.5.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->

      <list type="bulleted">
        <item>
          <p>The documentation is now built with open source tools 
            (<em>xsltproc</em> and <em>fop</em>) that exists on most 
            platforms. One visible change is that the frames are removed.</p>
          <p>Own Id: OTP-8249</p>
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] When information from an unknown agent is received,
            it was previously delivered to the default user via calls to all
            the functions of the callback API depending on the info type
            (<c>pdu</c>, <c>trap</c>, <c>report</c> or <c>inform</c>). 
            The problem was that the <c>TargetName</c> argument was useless 
            in this case (only an already known agent has a known/valid 
            <c>TargetName</c>, but the <c>TargetName</c> used in these calls
            was generated "on the fly"). </p>
          <p>This has now been changed so that when a message is received 
            from an unknown agent, then only 
            <seealso marker="snmpm_user#handle_agent">handle_agent</seealso>
            (for the default user) is called, but now this call also has a 
            <c>Type</c> argument, which is 
            <c>pdu | trap | report | inform</c>, depending on what kind of 
            message was actually received, thus making it possible for the 
            user to properly analyze the data received. </p>
	  <p>To handle this, the 
            <seealso marker="snmpm_user">snmpm_user</seealso> behaviour has 
            been updated. </p>
	  <p>*** POTENTIAL INCOMPATIBILITY ***</p>
          <p>Own Id: OTP-8229</p>
	  <!-- <p>Aux Id: Seq 11312</p> -->
        </item>

      </list>

    </section>

  </section> <!-- 4.15 -->


  <section>
    <title>SNMP Development Toolkit 4.14</title>

    <p>Version 4.14 supports code replacement in runtime from/to
      version 4.13.5, 4.13.4, 4.13.3, 4.13.2, 4.13.1 and 4.13.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->

      <list type="bulleted">
        <item>
          <p>[compiler] Include object- and notification groups in the 
            compiled mib.
            This will make it possible to import groups from other mibs. </p>
          <p>Also the SNMPv2-MIB-file has been updated to a more
            up-to-date version. </p>
          <p>Own Id: OTP-8223</p>
	  <!-- <p>Aux Id: Seq 11383</p> -->
        </item>

        <item>
          <p>[manager] Added support for message filtering in the
            network interface module provided with the application.
            The component that actually make the filter decisions
            is the network interface filter module. This module
            must implement the 
            <seealso marker="snmpm_network_interface_filter">network interface filter behaviour</seealso>
            for message filtering.
            See also the Configuring chapter of
            the User's Guide to see how to configure this feature. </p>
          <p>See the 
            <seealso marker="snmp_app#configuration_params">configuration</seealso> 
            chapter for more info about the filter options.</p>
          <p>Own Id: OTP-8228</p>
	  <p>Aux Id: Seq 11411</p>
        </item>

        <item>
          <p>The MIBs delivered as part of the application is now
            also available as man pages, section 7. </p>
          <p>Own Id: OTP-8237</p>
	  <!-- <p>Aux Id: Seq 11383</p> -->
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <p>-</p>

      <!-- 
      <list type="bulleted">
        <item>
          <p>[agent] The main agent type header file contained some miss-information 
            regarding the type of the entrytype field of the me-record, causing 
            unneccessary confusion.</p>
          <p>Own Id: OTP-8116</p>
	  <p>Aux Id: Seq 11312</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.14 -->


  <section>
    <title>SNMP Development Toolkit 4.13.5</title>

    <p>Version 4.13.5 supports code replacement in runtime from/to
      version 4.13.4, 4.13.3, 4.13.2, 4.13.1 and 4.13.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->

      <list type="bulleted">
        <item>
          <p>[agent] Improved the cache handling of the mib server. </p>
          <p>A number of new functions and config options for the mib server
            cache has been added. </p>
          <p>See 
            <seealso marker="snmpa#invalidate_mibs_cache">invalidate_mibs_cache/0,1</seealso>, 
            <seealso marker="snmpa#enable_mibs_cache">enable_mibs_cache/0,1</seealso>, 
            <seealso marker="snmpa#disable_mibs_cache">disable_mibs_cache/0,1</seealso>, 
            <seealso marker="snmpa#gc_mibs_cache">gc_mibs_cache/0,1,2,3</seealso>, 
            <seealso marker="snmpa#enable_mibs_cache_autogc">enable_mibs_cache_autogc/0,1</seealso>, 
            <seealso marker="snmpa#disable_mibs_cache_autogc">disable_mibs_cache_autogc/0,1</seealso>, 
            <seealso marker="snmpa#update_mibs_cache_age">update_mibs_cache_age/1,2</seealso> and 
            <seealso marker="snmpa#update_mibs_cache_gclimit">update_mibs_cache_gclimit/1,2</seealso> for more info. </p>
          <p>See also the 
            <seealso marker="snmp_app#configuration_params">configuration</seealso> 
            chapter for more info about the mib server cache options.</p>
          <p>Own Id: OTP-8182</p>
	  <p>Aux Id: Seq 11383</p>
        </item>

        <item>
          <p>[agent] A manager could no longer use the SNMPv3 user "initial" 
            as this was interpretated as the first step of the discovery. </p>
          <p>Introduced a new terminating option, <c>trigger_username</c> to
            make it possible to configure the username the agent reacts to. 
            Default is <c>""</c>. </p>
          <p>See the 
            <seealso marker="snmp_app#configuration_params">configuration</seealso> 
            chapter for more info about the discovery options.</p>
          <p>Own Id: OTP-8120</p>
	  <p>Aux Id: Seq 11361</p>
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[agent] The main agent type header file contained some miss-information 
            regarding the type of the entrytype field of the me-record, causing 
            unneccessary confusion.</p>
          <p>Own Id: OTP-8116</p>
	  <p>Aux Id: Seq 11312</p>
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.13.5 -->


  <section>
    <title>SNMP Development Toolkit 4.13.4</title>

    <p>Version 4.13.4 supports code replacement in runtime from/to
      version 4.13.3, 4.13.2, 4.13.1 and 4.13.</p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 

      <!-- 
      <list type="bulleted">
        <item>
          <p>[agent] Support for the discovery process. </p>
          <p>The agent can both initiate discovery itself (see the
            <seealso marker="snmp_agent_funct_descr#discovery">discovery</seealso> chapter
            for more info) and respond to discovery initiated by a manager.</p>
          <p>Own Id: OTP-7571</p>
	  <p>Aux Id: Seq 11053</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[agent] Originating discovery problems. </p>
          <p>Invalid state variable update during second stage of 
            discovery causes master agent crash. </p>
          <p>Also the net_if process failed to activate socket 
            ({active, once}) after first discovery response was sent. </p>
          <p>Own Id: OTP-8044</p>
	  <p>Aux Id: Seq 11295</p>
        </item>

        <item>
          <p>[agent] Terminating discovery problem. </p>
          <p>The reply to the second stage request should include a 
            varbind with <c>usmStatsNotInTimeWindows</c>.</p>
          <p>Own Id: OTP-8062</p>
	  <p>Aux Id: Seq 11318</p>
        </item>

        <item>
          <p>[agent] Originating discovery improvement. </p>
          <p>Added the ExtraInfo argument to the 
            <seealso marker="snmpa#discovery">discovery</seealso> function. 
            This argument will be passed on to the stage1_finish callback
            function. Also, the 
            <seealso marker="snmpa#discovery">discovery</seealso> function 
            will now always return <c>{ok, ManagerEngineID}</c> on successful 
            discovery. </p>
          <p>The <seealso marker="snmpa_discovery_handler">discovery handler</seealso> 
            behaviour updated accordingly. </p>
          <p>Own Id: OTP-8098</p>
	  <p>Aux Id: Seq 11346</p>
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.13.4 -->


  <section>
    <title>SNMP Development Toolkit 4.13.3</title>

    <p>Version 4.13.3 supports code replacement in runtime from/to
      version 4.13.2, 4.13.1 and 4.13.</p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 

      <!-- 
      <list type="bulleted">
        <item>
          <p>[agent] Support for the discovery process. </p>
          <p>The agent can both initiate discovery itself (see the
            <seealso marker="snmp_agent_funct_descr#discovery">discovery</seealso> chapter
            for more info) and respond to discovery initiated by a manager.</p>
          <p>Own Id: OTP-7571</p>
	  <p>Aux Id: Seq 11053</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] A request for an oid of type BITS was actually
            returned as OCTET STRING. </p>
          <p>Values of type BITS are encoded as OCTET STRING,
            which makes it impossible for the decoder to know that 
            they should really be of type BITS. 
            Instead, this has to be done higher up in the stack, where 
            there is knowledge of the MIB (assuming that the mib has 
            been loaded, there is info about the type of the mibentry). </p>
          <p>This problem has now been fixed, but requires that the MIB 
            defining this mib-entry is loaded! </p>
          <p>The utility function 
            <seealso marker="snmpm#oid_to_type">oid_to_type</seealso>
            has been added, for debug purpose. </p>
          <p>The utility function(s)  
            <seealso marker="snmp#octet_string_to_bits">octet_string_to_bits</seealso>
            and 
            <seealso marker="snmp#bits_to_octet_string">bits_to_octet_string</seealso>
            has also been added. These can be used if the user prefers to 
            handle the conversion on their own. </p>
          <p>Own Id: OTP-8015</p>
	  <p>Aux Id: Seq 11285</p>
        </item>

        <item>
          <p>[agent] Fixed some issues with the discovery handling. </p>
          <p>Changed the API of the 
            <seealso marker="snmpa#discovery">discovery</seealso>
            function to solve some 
            of these problems. </p>
          <p>Introduced various options for controlling the discovery
            process. See the 
            <seealso marker="snmp_app#configuration_params">configuration</seealso> 
            chapter for more info about the discovery options.</p>
          <p>Own Id: OTP-8020</p>
	  <p>Aux Id: Seq 11295</p>
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.13.3 -->


  <section>
    <title>SNMP Development Toolkit 4.13.2</title>

    <p>Version 4.13.2 supports code replacement in runtime from/to
      version 4.13.1 and 4.13.</p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 

      <!-- 
      <list type="bulleted">
        <item>
          <p>[agent] Support for the discovery process. </p>
          <p>The agent can both initiate discovery itself (see the
            <seealso marker="snmp_agent_funct_descr#discovery">discovery</seealso> chapter
            for more info) and respond to discovery initiated by a manager.</p>
          <p>Own Id: OTP-7571</p>
	  <p>Aux Id: Seq 11053</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] Failure during downed user cleanup.
            As part of the cleanup after a crashed user,
            the manager attempts to unregister the agents
            registered by this user. This however failed,
            causing a server crash. </p>
          <p>Own Id: OTP-7961</p>
	  <p>Aux Id: Seq 11275</p>
        </item>

        <item>
          <p>[manager] Incorrectly documented value type for 
            IpAddress (ip). The value type for IpAddress is
            documented as ip but is actually ia. The value type
            ip has been added. The old (not documented) value
            type ia still works. </p>
          <p>Own Id: OTP-7977</p>
	  <p>Aux Id: Seq 11279</p>
        </item>

        <item>
          <p>[manager] EngineId lookup fails when using version-3. </p>
          <p>Own Id: OTP-7983</p>
	  <p>Aux Id: Seq 11275</p>
        </item>

        <item>
          <p>[agent] As of version 4.13 the possible return values
            of the function 
            <seealso marker="snmpa_mpd#process_packet">snmpa_mpd:process_packet/4</seealso> 
            changed, but this was not documented. </p>
          <p>Own Id: OTP-7989</p>
	  <p>Aux Id: Seq 11275</p>
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.13.2 -->

  <section>
    <title>SNMP Development Toolkit 4.13.1</title>

    <p>Version 4.13.1 supports code replacement in runtime from/to
      version 4.13.</p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 

      <!-- 
      <list type="bulleted">
        <item>
          <p>[agent] Support for the discovery process. </p>
          <p>The agent can both initiate discovery itself (see the
            <seealso marker="snmp_agent_funct_descr#discovery">discovery</seealso> chapter
            for more info) and respond to discovery initiated by a manager.</p>
          <p>Own Id: OTP-7571</p>
	  <p>Aux Id: Seq 11053</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] Registration of users had some issues. </p>
          <p>Not all of the registration functions where actually exported
            (<seealso marker="snmpm#register_user">register_user/4</seealso> 
            and
            <seealso marker="snmpm#register_user_monitor">register_user_monitor/4</seealso>). 
            This has now been fixed. </p>
          <p>Also, the registration did not succeed unless
            user implemented the *new* behaviour. This has now
            also been fixed (registration succeeds if the user
            implements either the new (i.e. updated 
            <seealso marker="snmpm_user">snmpm_user</seealso>) 
            or the old user behaviour (<c>snmpm_user_old</c>)). </p>
          <p>Own Id: OTP-7902</p>
	  <p>Aux Id: Seq 11240</p>
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.13.1 -->

  <section>
    <title>SNMP Development Toolkit 4.13</title>
<!--
    <p>Version 4.13 supports code replacement in runtime from/to
      version 4.12.1.</p>
-->

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->
      <list type="bulleted">
        <item>
          <p>[agent] Support for the discovery process. </p>
          <p>The agent can both initiate discovery itself (see the
            <seealso marker="snmp_agent_funct_descr#discovery">discovery</seealso> chapter
            for more info) and respond to discovery initiated by a manager.</p>
          <p>Own Id: OTP-7571</p>
	  <p>Aux Id: Seq 11053</p>
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[agent] Unnecessary use of math:pow/2 could cause problems
            on systems without floating point support. </p>
          <p>Per Hedeland</p>
          <p>Own Id: OTP-7735</p>
	  <!-- <p>Aux Id: Seq 10966</p> -->
        </item>

        <item>
          <p>[manager] A major flaw was discovered with the agent handling. </p>
          <p>First, <c>TargetName</c> was never used as intended, as a unique
            identifier for the target (agent in this case). </p>
          <p>Second, <c>TargetName</c> had a <em>default value</em>, which meant 
            that several agents could have the same <c>TargetName</c>, causing
            unpredictable behaviour in the manager. </p>
          <p>Third, <c>EngineID</c> was not a mandatory config option and had
            furthermore also a <em>default value</em>. </p>

          <p>These problems has been solved in the following way: </p>
          <p>First, a new set of api functions has been introduced (and documented):
            <seealso marker="snmpm#register_user">register_user/4</seealso>,
            <seealso marker="snmpm#register_user_monitor">register_user_monitor/4</seealso>,
            <seealso marker="snmpm#register_agent">register_agent/3</seealso>,
            <seealso marker="snmpm#unregister_agent">unregister_agent/2</seealso>,
            <seealso marker="snmpm#agent_info">agent_info/2</seealso>,
            <seealso marker="snmpm#update_agent_info">update_agent_info/4</seealso>,
            <seealso marker="snmpm#sync_get">sync_get/3,4,5,6</seealso>,
            <seealso marker="snmpm#async_get">async_get/3,4,5,6</seealso>,
            <seealso marker="snmpm#sync_get_next">sync_get_next/3,4,5,6</seealso>,
            <seealso marker="snmpm#async_get_next">async_get_next/3,4,5,6</seealso>,
            <seealso marker="snmpm#sync_set">sync_set/3,4,5,6</seealso>,
            <seealso marker="snmpm#async_set">async_set/3,4,5,6</seealso>,
            <seealso marker="snmpm#sync_get_bulk">sync_get_bulk/5,6,7,8</seealso> and
            <seealso marker="snmpm#async_get_bulk">async_get_bulk/5,6,7,8</seealso> 
            that all use <c>TargetName</c> (and not, as previously, <c>Addr</c>
            and <c>Port</c>) to identify the agent (also the return value of 
            <seealso marker="snmpm#which_agents">which_agents</seealso> has 
            been changed). </p> 
          <p>Second, for backward compatibility, the old functions still 
            exist, but are no longer documented and are now wrappers for the 
            new functions, including erroneous default value for EngineID and 
            all. The TargetName is however generated from the provided 
            <c>Addr</c>, <c>Port</c> and <c>Version</c> config options. </p>
           <p>Third, the behaviour of the 
             <seealso marker="snmpm_user">SNMP manager user</seealso> has
             been changed to reflect this, i.e. 
             <seealso marker="snmpm_user#handle_pdu">handle_pdu/4</seealso>,
             <seealso marker="snmpm_user#handle_trap">handle_trap/3</seealso>,
             <seealso marker="snmpm_user#handle_inform">handle_inform/3</seealso>, 
             <seealso marker="snmpm_user#handle_report">handle_report/3</seealso> 
             and the return-value of 
             <seealso marker="snmpm_user#handle_agent">handle_agent/4</seealso>.
             The old (non-documented) callback-functions (using Addr and Port) 
             will still be called if the agent was registered using the old 
             registration functions. </p>
          
          <p>Own Id: OTP-7836</p>
	  <!-- <p>Aux Id: Seq 10966</p> -->
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.13 -->

  <section>
    <title>SNMP Development Toolkit 4.12.2</title>
    <p>Version 4.12.2 supports code replacement in runtime from/to
      version 4.12.1, 4.12, 4.11.2, 4.11.1 and 4.11.</p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 
      <!-- 
      <list type="bulleted">
        <item>
        <item>
          <p>[agent] Improvement of the inform reporting.
            It was previously not certain how many acks an
            application received, 0, 1 or 2. This has now been
            fixed, so that only 1 (one) ack is issued. </p> 
          <p>Per Hedeland</p>
          <p>Own Id: OTP-7525</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[agent] Bad session cache (usm+camv-info) invalidation 
            could cause user crash, through call(s) to (a number of) 
            MIB API function(s) (undefined function). </p>
          <p>Own Id: OTP-7868</p>
	  <!-- <p>Aux Id: Seq 11124</p> -->
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.12.2 -->

  <section>
    <title>SNMP Development Toolkit 4.12.1</title>
    <p>Version 4.12.1 supports code replacement in runtime from/to
      version 4.12, 4.11.2, 4.11.1 and 4.11.</p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 
      <!-- 
      <list type="bulleted">
        <item>
        <item>
          <p>[agent] Improvement of the inform reporting.
            It was previously not certain how many acks an
            application received, 0, 1 or 2. This has now been
            fixed, so that only 1 (one) ack is issued. </p> 
          <p>Per Hedeland</p>
          <p>Own Id: OTP-7525</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>Logging of messages with the GetBulk-request PDU
            incorrectly produced an erroneous entry in the
            log: "An error occurred". </p>
          <p>The reason for this was that the PDU-fields
            error_status and error_index is re-used for
            Non-repeaters and Max-repetitions for
            GetBulk-request PDUs, but this was not handled
            by the logging code. </p>
          <p>Own Id: OTP-7695</p>
	  <p>Aux Id: Seq 11124</p>
        </item>

        <item>
          <p>[agent] An attempt to set the row status to active for an 
            notReady table row, could result in an "inconsistentValue" 
            error. </p>
          <p>The same problem existed when attempting to set row status 
            to notInService for a row in notReady. </p>
          <p>Serge Aleynikov</p>
          <p>Own Id: OTP-7698</p>
	  <!-- <p>Aux Id: Seq 10966</p> -->
        </item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.12.1 -->

  <section>
    <title>SNMP Development Toolkit 4.12</title>
    <p>Version 4.12 supports code replacement in runtime from/to
      version 4.11.2, 4.11.1 and 4.11.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->
      <list type="bulleted">
        <item>
          <p>[agent] A simple lookup cache has been added to improve 
            the mib server lookup performance. </p>
          <p>This can be disabled with the mib_server 
            <seealso marker="snmp_app">cache</seealso> option. </p> 
          <p>Own Id: OTP-7346</p>
        </item>

        <item>
          <p>[agent] Improvement of the inform reporting.
            It was previously not certain how many acks an
            application received, 0, 1 or 2. This has now been
            fixed, so that only 1 (one) ack is issued. </p> 
          <p>Per Hedeland</p>
          <p>Own Id: OTP-7525</p>
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <p>-</p>
      <!-- 
      <list type="bulleted">
        <item>
          <p>[manager] Encryption error when attempting to send
            version 3 inform-requests. </p>
          <p>Own Id: OTP-7432</p>
	  <p>Aux Id: Seq 10966</p>
        </item>

      </list>
      -->

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.12 -->

  <section>
    <title>SNMP Development Toolkit 4.11.2</title>
    <p>Version 4.11.2 supports code replacement in runtime from/to
      version 4.11.1 and 4.11. </p>

    <section>
      <title>Improvements and new features</title>
      <p>-</p> 
      <!-- 
      <list type="bulleted">
        <item>
	  <p>Added utility functions for transforming DateAndTime
            as [int()] to strings; 
            <seealso marker="snmp#dat2s">date_and_time_to_string/2</seealso>
            and  
            <seealso marker="snmp#dat2s2">date_and_time_to_string2/1</seealso>. </p>
          <p>Also added new validation function 
            <seealso marker="snmp#vdat">validate_date_and_time/2</seealso>. </p>
	  <p>Own Id: OTP-7412</p>
	  <p>Aux Id: Seq 10987</p>
        </item>
      </list>
      -->
    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] Erroneous engine-id check when receiving version 3 
            informs. </p>
          <p>Own Id: OTP-7570</p>
	  <p>Aux Id: Seq 11060</p>
        </item>

        <item>
	  <p>Receiving an snmp message with a very large version
            number could cause the erlang node to run out of
            memory and consequently crash. </p>
          <p>The standard specifies the snmp version as an
            (unlimited) INTEGER, but today only
            0 (version 1), 1 (version 2) and 3 (version 3) is
            actually used. So, when decoding a message, a limit
            has been put on the snmp version integer in order
            to not allow this kind of a problem. </p>
	  <p>Own Id: OTP-7575</p>
	  <p>Aux Id: Seq 11064</p>
        </item>

      </list>
    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.11.2 -->


  <section>
    <title>SNMP Development Toolkit 4.11.1</title>
    <p>Version 4.11.1 supports code replacement in runtime from/to
      version 4.11.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->
      <list type="bulleted">
        <item>
          <p>[compiler] The MIB compiler did not retrieve the REFERENCE part
            of a SNMP MIB definition. </p>
          <p>This problem has been partly solved. For SNMP tables, 
            the assocList field of the tables mib-entry record now contains 
            this info (as <c>{reference, string()}</c>), <em>if</em> the 
            MIB was compiled with the compiler option <em>+reference</em>. </p>
          <p>This solution is temporary, until such time as a permanent
            solution (and probably not backward compatible) is devised, which
            retrieves and stores all REFERENCE part(s) of a MIB. </p>
          <p>See the 
            <seealso marker="snmpc#compiler_opts">compiler options</seealso> 
            for more info. </p> 

          <p>Serge Aleynikov</p>
          <p>Own Id: OTP-7426</p>
        </item>

        <item>
	  <p>Added utility functions for transforming DateAndTime
            as [int()] to strings; 
            <seealso marker="snmp#dat2s">date_and_time_to_string/2</seealso>
            and  
            <seealso marker="snmp#dat2s2">date_and_time_to_string2/1</seealso>. </p>
          <p>Also added new validation function 
            <seealso marker="snmp#vdat">validate_date_and_time/2</seealso>. </p>
	  <p>Own Id: OTP-7412</p>
	  <p>Aux Id: Seq 10987</p>
        </item>

      </list>

    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] Encryption error when attempting to send
            version 3 inform-requests. </p>
          <p>Own Id: OTP-7432</p>
	  <p>Aux Id: Seq 10966</p>
        </item>

      </list>
    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.11.1 -->

  <section>
    <title>SNMP Development Toolkit 4.11</title>
    <p>Version 4.11 supports code replacement in runtime from/to
      version 4.10.3, 4.10.2, 4.10.1 and 4.10.</p>

    <section>
      <title>Improvements and new features</title>
      <!-- 
      <p>-</p> 
      -->
      <list type="bulleted">
        <item>
          <p>[agent] Performance improvements in the case when an SNMP 
            manager performs an snmpwalk. </p>
          <p>Martin Bj&ouml;rklund</p>
          <p>Own Id: OTP-7201</p>
        </item>

        <item>
          <p>The API for sending inform(s) has been improved. Also
            the documentation has been corrected and updated. See 
            <seealso marker="snmpa#send_notification">snmpa:send_notification</seealso> and 
            <seealso marker="snmpa_notification_delivery_info_receiver">snmpa_notification_delivery_info_receiver</seealso> 
            for more info.</p>
          <p>Own Id: OTP-7287</p>
          <p>Aux Id: Seq 10926</p>
        </item>

        <item>
	  <p>[agent] Performance of the internal database (local-db) 
           has been improved.</p>
	  <p>Own Id: OTP-7319</p>
	  <p>Aux Id: Seq 10942</p>
        </item>

        <item>
	  <p>[agent] Added utility functions,
            <seealso marker="snmpa#restart_worker">snmpa:restart_worker/0,1</seealso> and 
            <seealso marker="snmpa#restart_set_worker">snmpa:restart_set_worker/0,1</seealso>, 
            for restarting the agent worker processes (in case the agent is
            multi-threaded).</p>
	  <p>Own Id: OTP-7369</p>
        </item>

        <item>
	  <p>Add utility function to 
            <seealso marker="snmp#read_mib">read</seealso> 
            a compiled mib. </p>
	  <p>Own Id: OTP-7371</p>
        </item>

      </list>
    </section>

    <section>
      <title>Reported Fixed Bugs and Malfunctions</title>
      <!-- 
      <p>-</p>
      -->
      <list type="bulleted">
        <item>
          <p>[manager] Encryption error when attempting to send
            version 3 inform-requests. </p>
          <p>Own Id: OTP-7377</p>
	  <p>Aux Id: Seq 10966</p>
        </item>

      </list>
    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>
    </section>
  </section> <!-- 4.11 -->

  <!-- section>
    <title>Release notes history</title>
    <p>For information about older versions see
      <url href="part_notes_history_frame.html">release notes history</url>.</p>
  </section -->
</chapter>