<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>1996</year><year>2014</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
</legalnotice>
<title>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 5.1.2</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
A bug in the SNMP Agent has been corrected; when opening
a port using the command line argument -snmpa_fd the Port
should be 0 when calling gen_udp:open.</p>
<p>
A bug in the SNMP manager has been corrected; it should
not look at the -snmp_fd command line argument, but
instead at -snmpm_fd.</p>
<p>
Own Id: OTP-12669 Aux Id: seq12841 </p>
</item>
</list>
</section>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
Improved cryptocraphic capability.</p>
<p>
Own Id: OTP-12452</p>
</item>
</list>
</section>
</section>
<section>
<title>SNMP Development Toolkit 5.1.1</title>
<p>Version 5.1.1 supports code replacement in runtime from/to
version 5.1. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[compiler] Refinement of type Opaque was not allowed. </p>
<p>MIB constructs such as '<c>SYNTAX Opaque (SIZE(0..65535))</c>'
was previously not allowed,
see the standard <c>ALARM-MIB</c> for eaxmple. </p>
<p>Own Id: OTP-12066</p>
<p>Aux Id: Seq 12669</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent]
see <seealso marker="snmpa#load_mibs">load_mibs</seealso> and
<seealso marker="snmpa#unload_mibs">unload_mibs</seealso>. </p>
<p>Own Id: OTP-11216</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 5.1.1 -->
<section><title>SNMP 5.1</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
The SNMP manager has been enhanced with dual stack
IPv4+IPv6, as the agent just was. The documentation is
also now updated for both the agent and the manager.</p>
<p>
Own Id: OTP-12108 Aux Id: OTP-12020 </p>
</item>
</list>
</section>
</section>
<section><title>SNMP 5.0</title>
<section><title>Improvements and New Features</title>
<list>
<item>
<p>
SNMP has been improved to handle IPv6. The agent can
handle dual stack IPv4 + IPv6, but not yet the manager.
The documentation also still lags behind... If you do
such advanced stuff like writing a custom net_if module,
the interface for it has changed, but other than that
SNMP is backwards compatible.</p>
<p>
*** POTENTIAL INCOMPATIBILITY ***</p>
<p>
Own Id: OTP-12020 Aux Id: OTP-11518 </p>
</item>
</list>
</section>
</section>
<section><title>SNMP 4.25.1</title>
<section><title>Fixed Bugs and Malfunctions</title>
<list>
<item>
<p>
Application upgrade (appup) files are corrected for the
following applications: </p>
<p>
<c>asn1, common_test, compiler, crypto, debugger,
dialyzer, edoc, eldap, erl_docgen, et, eunit, gs, hipe,
inets, observer, odbc, os_mon, otp_mibs, parsetools,
percept, public_key, reltool, runtime_tools, ssh,
syntax_tools, test_server, tools, typer, webtool, wx,
xmerl</c></p>
<p>
A new test utility for testing appup files is added to
test_server. This is now used by most applications in
OTP.</p>
<p>
(Thanks to Tobias Schlager)</p>
<p>
Own Id: OTP-11744</p>
</item>
</list>
</section>
</section>
<section>
<title>SNMP Development Toolkit 4.25.0.1</title>
<p>Version 4.25.0.1 supports code replacement in runtime from/to
version 4.25, 4.24.2, 4.24.1 and 4.24. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>Updated doc files to utf8. </p>
<p>Own Id: OTP-10907</p>
</item>
<item>
<p>Fixed test suite to support UTF-8 paths. </p>
<p>Own Id: OTP-10877</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>Wrong block cypher type used for AES ('aes_cbf128'
instead of 'aes_cfb128') when performing AES block
encrypt/decrypt which breaks SNMP usmAesCfb128Protocol
in agent and manager. </p>
<p>Own Id: OTP-11412</p>
</item>
<item>
<p>[manager] When performing the AES encryption, invalid values for
the EngineBoots and EngineTime was used. </p>
<p>The values of the local agent was used, which would have produced
"some" values if an agent was actually running.
If not it would have caused a crash. </p>
<p>Own Id: OTP-11413</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 4.25.0.1 -->
<section>
<title>SNMP Development Toolkit 4.25</title>
<p>Version 4.25 supports code replacement in runtime from/to
version 4.24.2, 4.24.1, 4.24, 4.23.1 and 4.23. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Enable SNMP to create missing database directories. </p>
<p>Add
<seealso marker="snmp_app#db_init_error">
{db_init_error, create_db_and_dir}</seealso> option to SNMP
<seealso marker="snmp_app#manager_opts_and_types">manager</seealso>
and
<seealso marker="snmp_app#agent_opts_and_types">agent</seealso>.
This allows them to create any missing parent directories for
<c>db_dir</c>, rather than treating any missing directories
as a fatal error.
The default for <c>db_init_error</c>, which is <c>terminate</c>,
is unchanged. </p>
<p>Steve Vinoski</p>
<p>Own Id: OTP-11352</p>
</item>
<item>
<p>[manager] Improved handling of unexpected return values from
<seealso marker="snmpm_user">snmpm_user</seealso>
callback functions. </p>
<p>Violations of the documented API (crashes or invalid return
values) will now result in an error message. </p>
<p>Own Id: OTP-11307</p>
</item>
<item>
<p>Add (atl) log conversion block option. </p>
<p>It is now possible to request that the Audit Trail Log should
be blocked during conversion (<c>log_to_txt</c> or <c>log_to_io</c>).
This could be usefull when coverting an entire large log (when
there is a chance it may otherwise wrap during conversion). </p>
<p>See
agent
<seealso marker="snmpa#log_to_txt">log_to_txt</seealso> and
<seealso marker="snmpa#log_to_io">log_to_io</seealso> and also
manager
<seealso marker="snmpm#log_to_txt">log_to_txt</seealso> and
<seealso marker="snmpm#log_to_io">log_to_io</seealso>
for details. </p>
<p>Own Id: OTP-11396</p>
<p>Own Id: seq12433</p>
</item>
<item>
<p>When converting an Audit Trail Log to text, a corrupt
log entry could cause the entire conversion to fail. </p>
<p>Also, for a log with sequence numbers, failing to
decode a log entry would cause the conversion to fail
(not because of the failed decode, but because of the
failure to write the error message). </p>
<p>Own Id: OTP-111453</p>
<p>Aux Id: Seq 12459</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>Wrong block cypher type used for AES ('aes_cbf128'
instead of 'aes_cfb128') when performing AES block
encrypt/decrypt which breaks SNMP usmAesCfb128Protocol
in agent and manager. </p>
<p>Own Id: OTP-11412</p>
</item>
<item>
<p>[manager] When performing the AES encryption, invalid values for
the EngineBoots and EngineTime was used. </p>
<p>The values of the local agent was used, which would have produced
"some" values if an agent was actually running.
If not it would have caused a crash. </p>
<p>Own Id: OTP-11413</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 4.25 -->
<section>
<title>SNMP Development Toolkit 4.24.2</title>
<p>Version 4.24.2 supports code replacement in runtime from/to
version 4.24.1, 4.24, 4.23.1 and 4.23. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Improved documentation for the functions for
loading and unloading mibs,
see <seealso marker="snmpa#load_mibs">load_mibs</seealso> and
<seealso marker="snmpa#unload_mibs">unload_mibs</seealso> for
more info. </p>
<p>Also added new functions for loading and unloading a single mib,
see <seealso marker="snmpa#load_mib">load_mib</seealso> and
<seealso marker="snmpa#unload_mib">unload_mib</seealso> for
more info. </p>
<p>Own Id: OTP-11216</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent]
see <seealso marker="snmpa#load_mibs">load_mibs</seealso> and
<seealso marker="snmpa#unload_mibs">unload_mibs</seealso>. </p>
<p>Own Id: OTP-11216</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 4.24.2 -->
<section>
<title>SNMP Development Toolkit 4.24.1</title>
<p>Version 4.24.1 supports code replacement in runtime from/to
version 4.24, 4.23.1 and 4.23. </p>
<section>
<title>Improvements and new features</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent,manager] Updated to support the new crypto interface. </p>
<p>Own Id: OTP-11009</p>
</item>
</list>
-->
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Reading the value of the vacmViewTreeFamilyMask returns
it in the wrong (internal bitlist) format. </p>
<p>The vacmViewTreeFamilyMask is defined as a bit string in the MIB
(OCTET STRING). Internally a bitlist (list of 1's and 0's,
see <seealso marker="snmp_agent_config_files#vacm">vacm config file</seealso>
for more info) is used.
However, the MIB implementation assumed the latter, effectively
rendering all attempts to read/set masks via SNMP unsuccessful. </p>
<p>Since the mask is used in hot paths (e.g. access permission checks
for each SNMP operation, the bitlist representation of the mask has
benefits (e.g. faster processing). Reading/writing the view mask
objects is less time-critical. Therefore, to fix the issue, convert
between the bitlist (internal) representation and bitstring
(external) when the vacmViewTreeFamilyMask objects are accessed. </p>
<p>Also, the check of the vacm config file was invalid with
regard to the mask value. It was assumed to be a proper oid, which
is not strictly the case (see bitlist above). </p>
<p>Own Id: OTP-11177</p>
<p>Stefan Zegenhagen</p>
</item>
<item>
<p>[agent] The counter increment function in the local-db was
incorrect. It did not handle counter wrap correctly. </p>
<p>Own Id: OTP-11192</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 4.24.1 -->
<section>
<title>SNMP Development Toolkit 4.24</title>
<p>Version 4.24 supports code replacement in runtime from/to
version 4.23.1 and 4.23. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent,manager] Updated to support the new crypto interface. </p>
<p>Own Id: OTP-11009</p>
</item>
<item>
<p>[agent] Introduced a documented behaviour for the mib-server
<seealso marker="snmpa_mib_data">mib-data backend</seealso>.
At present only the default module (<c>snmpa_mib_data_tttn</c>) is
provided. </p>
<p>A config option for the (agent)
<seealso marker="snmp_config#agent_mib_server">mib-servers</seealso>
mib-data backend module has been added to the agent config options,
<seealso marker="snmp_config#agent_ms_data_module">data_module</seealso>. </p>
<p>Own Id: OTP-11101</p>
</item>
<item>
<p>[agent] Introduced a documented behaviour for the
<seealso marker="snmpa_mib_storage">mib storage</seealso>.
At present there are three simple modules
(<c>snmpa_mib_storage_ets</c>, <c>snmpa_mib_storage_dets</c> and
<c>snmpa_mib_storage_mnesia</c>) implementing this behaviour,
provided with the app. </p>
<p>A config option for the (agent)
<seealso marker="snmp_config#agent_mib_storage">mib storage</seealso>
has been added to the agent config options. </p>
<p>Own Id: OTP-11107</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent,manager] Updated to support the new crypto interface. </p>
<p>Own Id: OTP-11009</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 4.24 -->
<section>
<title>SNMP Development Toolkit 4.23.1</title>
<p>Version 4.23.1 supports code replacement in runtime from/to
version 4.23. </p>
<section>
<title>Improvements and new features</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent] Errors in <c>vacmAccessTable</c> RowStatus handling.
There are problems with the handling of vacmAccessTableStatus
that cause some SNMP test suites to report errors.
Most notably, erroneous set operations frequently cause "genErr"
errors to be returned. These "genErr" errors are usually caused
by badmatch exceptions coming from
<c>{ok, Row} = snmpa_vacm:get_row(RowIndex)</c>
if the row does not exist. </p>
<p>The semantics of the RowStatus handling in that table has
been adjusted to be compliant with the RowStatus
textual description of SNPMv2-TC MIB. </p>
<p>Stefan Zegenhagen</p>
<p>Own Id: OTP-10164</p>
</item>
</list>
-->
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[compiler] Now handles MIBs importing the pesudotype BITS. </p>
<p>Own Id: OTP-10799</p>
</item>
<item>
<p>[compiler] The MIB compiler could not handle a table index
that was defined later in the MIB. </p>
<p>Own Id: OTP-10808</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
-->
</section>
</section> <!-- 4.23.1 -->
<section>
<title>SNMP Development Toolkit 4.23</title>
<!--
<p>Version 4.23 supports code replacement in runtime from/to
version 4.22.1,
4.22, 4.21.7 4.21.6 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1 and 4.21. </p>
-->
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[manager] Polish return values of snmpm_user_default according
to snmpm_user doc.</p>
<p>Luca Favatella</p>
<p>Own Id: OTP-10671</p>
</item>
<item>
<p>[agent] Remove runtime warning in snmpa_agent because of
tuple fun usage. </p>
<p>Luca Favatella</p>
<p>Own Id: OTP-10672</p>
</item>
<item>
<p>[manager] SNMP manager performance optimization. </p>
<p>Ivan Dubovik</p>
<p>Own Id: OTP-10673</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent] Simultaneous
<seealso marker="snmpa#backup">snmpa:backup/1,2</seealso>
calls can interfere.
The master agent did not check if a backup was already in
progress when a backup request was accepted. </p>
<p>Own Id: OTP-9884</p>
<p>Aux Id: Seq 11995</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[manager] The old Addr-and-Port based API functions, previously
long deprecated and marked for deletion in R16B, has now been
removed. </p>
<p>Own Id: OTP-10027</p>
</item>
</list>
</section>
</section> <!-- 4.23 -->
<section>
<title>SNMP Development Toolkit 4.22.1</title>
<p>Version 4.22.1 supports code replacement in runtime from/to
version 4.22, 4.21.7 4.21.6 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1 and
4.21. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Sematic fixes to SNMP-USER-BASED-SM-MIB.
The semantics allow the <c>usmUserAuthKeyChange</c> and
<c>usmUserPrivKeyChange</c> objects to be written to in the
same set requests that also creates and clones the user.
This was not possible beforehand, causing test tools checking
semantic SNMPv3 behaviour to fail on a lot of test cases. </p>
<p>Furthermore, once the user has been cloned by writing to an
instance of <c>usmUserCloneFrom</c>, further set-operations to
the same object will not return an error, but be no-ops.
Especially, it must be avoided to copy security parameters
again (possibly even from a different user). </p>
<p>Stefan Zegenhagen</p>
<p>Own Id: OTP-10166</p>
</item>
<item>
<p>[agent] Errors in <c>vacmAccessTable</c> RowStatus handling.
There are problems with the handling of vacmAccessTableStatus
that cause some SNMP test suites to report errors.
Most notably, erroneous set operations frequently cause "genErr"
errors to be returned. These "genErr" errors are usually caused
by badmatch exceptions coming from
<c>{ok, Row} = snmpa_vacm:get_row(RowIndex)</c>
if the row does not exist. </p>
<p>The semantics of the RowStatus handling in that table has
been adjusted to be compliant with the RowStatus
textual description of SNPMv2-TC MIB. </p>
<p>Stefan Zegenhagen</p>
<p>Own Id: OTP-10164</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Fix walk over vacmAccessTable.
Fix the get_next implementation of vacmAccessTable to
return all table entries. </p>
<p>The get_next implementation of vacmAccessTable did not return
all available table data. Instead, it only returned the first
column for each row, and all columns for the last row available. </p>
<p>Stefan Zegenhagen</p>
<p>Own Id: OTP-10165</p>
</item>
<item>
<p>[manager]
<seealso marker="snmpm#log_to_io">snmpm:log_to_io/6</seealso>
did not use the LogName argument. </p>
<p>Own Id: OTP-10066</p>
</item>
<item>
<p>Incorrect TimeTicks decode. Also bad handling of
invalid encode (value outside of value range) for both
<c>TimeTicks</c> and <c>Unsigned32</c>. </p>
<p>Own Id: OTP-10132</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.22.1 -->
<section>
<title>SNMP Development Toolkit 4.22</title>
<p>Version 4.22 supports code replacement in runtime from/to
version 4.21.7 4.21.6 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1 and 4.21. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[compiler] The table information the MIB compiler provides with
augmented tables has been extended with <c>nbr_of_cols</c>,
<c>first_accessible</c> and <c>not_accessible</c>. </p>
<p>Own Id: OTP-9969</p>
</item>
<item>
<p>Added the <c>log_to_io</c> audit-trail-log converter function
to the api modules of both the
<seealso marker="snmpm#log_to_io">manager</seealso>
and
<seealso marker="snmpa#log_to_io">agent</seealso>. </p>
<p>Own Id: OTP-9940</p>
</item>
<item>
<p>[manager] Introduced a new transport module,
<c>snmpm_net_if_mt</c>,
which handles all incomming and outgoing
traffic in newly created processes. The message/request is
processed and then the process exits. </p>
<p>Own Id: OTP-9876</p>
</item>
<item>
<p>[agent] Documenting previously existing but undocumented function,
<seealso marker="snmp_generic#get_table_info">snmp_generic:get_table_info/2</seealso>. </p>
<p>Own Id: OTP-9942</p>
</item>
<item>
<p>[agent] Improve error handling while reading agent config files.
Some files contain mandatory information and is therefor themself
mandatory. </p>
<p>Own Id: OTP-9943</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent] Simultaneous
<seealso marker="snmpa#backup">snmpa:backup/1,2</seealso>
calls can interfere.
The master agent did not check if a backup was already in
progress when a backup request was accepted. </p>
<p>Own Id: OTP-9884</p>
<p>Aux Id: Seq 11995</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.22 -->
<section>
<title>SNMP Development Toolkit 4.21.7</title>
<p>Version 4.21.7 supports code replacement in runtime from/to
version 4.21.6, 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1, 4.21, 4.20.1 and
4.20. </p>
<section>
<title>Improvements and new features</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[agent] DoS attack using GET-BULK with large value of
MaxRepetitions.
A preventive method has been implementing by simply
limit the number of varbinds that can be included in
a Get-BULK response message. This is specified by the
new config option,
<seealso marker="snmp_app#agent_gb_max_vbs">gb_max_vbs</seealso>.
</p>
<p>Own Id: OTP-9700</p>
</item>
</list>
-->
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Simultaneous
<seealso marker="snmpa#backup">snmpa:backup/1,2</seealso>
calls can interfere.
The master agent did not check if a backup was already in
progress when a backup request was accepted. </p>
<p>Own Id: OTP-9884</p>
<p>Aux Id: Seq 11995</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.21.7 -->
<section>
<title>SNMP Development Toolkit 4.21.6</title>
<p>Version 4.21.6 supports code replacement in runtime from/to
version 4.21.5, 4.21.4, 4.21.3, 4.21.2, 4.21.1, 4.21, 4.20.1 and
4.20. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] DoS attack using GET-BULK with large value of
MaxRepetitions.
A preventive method has been implementing by simply
limit the number of varbinds that can be included in
a Get-BULK response message. This is specified by the
new config option,
<seealso marker="snmp_app#agent_gb_max_vbs">gb_max_vbs</seealso>.
</p>
<p>Own Id: OTP-9700</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Mib server cache gclimit update function incorrectly calls
age update function.
The gclimit update function,
<seealso marker="snmpa#update_mibs_cache_gclimit">update_mibs_cache_gclimit/1</seealso>,
<em>incorrectly</em> called the age update function,
<seealso marker="snmpa#update_mibs_cache_age">update_mibs_cache_age/2</seealso>. </p>
<p>Johan Claesson</p>
<p>Own Id: OTP-9868</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.21.6 -->
<section>
<title>SNMP Development Toolkit 4.21.5</title>
<p>Version 4.21.5 supports code replacement in runtime from/to
version 4.21.4, 4.21.3, 4.21.2, 4.21.1, 4.21, 4.20.1 and 4.20. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Removed (more) use of old style tuple funs. </p>
<p>Own Id: OTP-9783</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Repeated vacm table dumping fails due to file name
conflict. When dumping the vacm table to disk, a temoporary
file with a fixed name was used. If the table dumping
(snmpa_vacm:dump_table/0) was initiated from several different
processes in rapid succesion, the dumping could fail because the
different processes was simultaniously trying to write to the
same file. This problem has been eliminated by creating a unique
name for the temporary file. </p>
<p>Own Id: OTP-9851</p>
<p>Aux Id: Seq 11980</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>foo. </p>
<p>Own Id: OTP-9718</p>
</item>
</list>
-->
</section>
</section> <!-- 4.21.5 -->
<section>
<title>SNMP Development Toolkit 4.21.4</title>
<p>This version has never been released for R14B.</p>
<p>Version 4.21.4 supports code replacement in runtime from/to
version 4.21.3, 4.21.2, 4.21.1, 4.21, 4.20.1, 4.20 and 4.19. </p>
<section>
<title>Improvements and new features</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>[compiler] Improved version info printout from the
<seealso marker="snmpc(command)#">MIB compiler frontend escript</seealso>. </p>
<p>Own Id: OTP-9618</p>
</item>
</list>
-->
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Removed use of old style tuple funs. </p>
<p>Own Id: OTP-9779</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>foo. </p>
<p>Own Id: OTP-9718</p>
</item>
</list>
-->
</section>
</section> <!-- 4.21.4 -->
<section>
<title>SNMP Development Toolkit 4.21.3</title>
<p>Version 4.21.3 supports code replacement in runtime from/to
version 4.21.2, 4.21.1, 4.21, 4.20.1, 4.20 and 4.19. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[compiler] Improved version info printout from the
<seealso marker="snmpc(command)#">MIB compiler frontend escript</seealso>. </p>
<p>Own Id: OTP-9618</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Version 4.20 introduced a change that broke trap
sending from subagents. Due to a bug in the test code,
this was not discovered, until that bug was fixed. </p>
<p>Own Id: OTP-9745</p>
</item>
<item>
<p>[agent] When sending an error message (reply) regarding
<c>snmpUnknownPDUHandlers</c>, the agent used the wrong OID. </p>
<p>Own Id: OTP-9747</p>
</item>
<item>
<p>[compiler] Fix the <c>--warnings/--W</c> option parsing in the
<seealso marker="snmpc(command)#option_warnings">snmpc</seealso>
wrapper (e)script.
The short warning option was incorrectly <c>--w</c>, instead
of as documented <c>--W</c>. This has now been corrected. </p>
<p>*** POTENTIAL INCOMPATIBILITY ***</p>
<p>Tuncer Ayaz</p>
<p>Own Id: OTP-9718</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[compiler] The short warning option has been changed from
<c>--w</c> to <c>--W</c> to comply with the documentation. </p>
<p>Tuncer Ayaz</p>
<p>Own Id: OTP-9718</p>
</item>
</list>
</section>
</section> <!-- 4.21.3 -->
<section>
<title>SNMP Development Toolkit 4.21.2</title>
<p>Version 4.21.2 supports code replacement in runtime from/to
version 4.21.1, 4.21, 4.20.1, 4.20 and 4.19. </p>
<section>
<title>Improvements and new features</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>Bad note store GC timer deactivation.
Wrong field in the state record was set (timeout instead active). </p>
<p>Stefan Grundmann</p>
<p>Own Id: OTP-9690</p>
</item>
</list>
-->
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>Bad note store GC timer deactivation.
Wrong field in the state record was set (timeout instead active). </p>
<p>Stefan Grundmann</p>
<p>Own Id: OTP-9690</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.21.2 -->
<section>
<title>SNMP Development Toolkit 4.21.1</title>
<p>Version 4.21.1 supports code replacement in runtime from/to
version 4.20.1, 4.20 and 4.19. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[compiler] Used wrong variable name (for
warnings-as-errors variable), which caused the
compiler to crash when using the snmpc (e)script. </p>
<p>Also added the option
<seealso marker="snmpc(command)#option_werror">--Werror</seealso>
for the SNMP MIB compiler (escript) frontend (to mimic
<seealso marker="erts:erlc">erlc</seealso>),
which specifies whether warnings should be treated as errors. </p>
<p>Own Id: OTP-9447</p>
</item>
<item>
<p>[agent] Some very minor debugging improvements. </p>
<p>Own Id: OTP-9446</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>The snmp config tool could not handle (manager) audit trail config
because the option seqno was not handled. </p>
<p>Own Id: OTP-9354</p>
</item>
</list>
-->
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.21.1 -->
<section>
<title>SNMP Development Toolkit 4.21</title>
<p>Version 4.21 supports code replacement in runtime from/to
version 4.20.1, 4.20 and 4.19. </p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[manager] There was no way to specify transport domain.
The transport domains was assumed to be IPv4 (transportDomainUdpIpv4).
This has now been changed so that it can also be IPv6
(transportDomainUdpIpv6).
To facilitate this, the transport domain, <c>tdomain</c>,
is now a (new) valid option when
<seealso marker="snmpm#register_agent">registering</seealso>
a new agent (and
<seealso marker="snmpm#update_agent_info">updating</seealso>
agent info). </p>
<p>This also mean that the transport behaviour has changed. </p>
<p>Own Id: OTP-9305</p>
<p>Aux Id: Seq 11847</p>
</item>
<item>
<p>[compiler] Added the option
<seealso marker="snmpc#compile">warnings_as_errors</seealso>
(for the SNMP MIB compiler (escript) frontend, the option
<seealso marker="snmpc(command)#option_wae">--wae</seealso> is used)
which specifies whether warnings should be treated as errors. </p>
<p>Tuncer Ayaz</p>
<p>Own Id: OTP-9437</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>The snmp config tool could not handle (manager) audit trail config
because the option seqno was not handled. </p>
<p>Own Id: OTP-9354</p>
</item>
<item>
<p>[agent] The SNMP ACM cache was not properly updated when
changes where made to the VACM security-to-group, access and
view-tree-family tables. </p>
<p>Own Id: OTP-9367</p>
<p>Aux Id: Seq 11858</p>
</item>
<item>
<p>Fixed install directory typo for man3. </p>
<p>Peter Lemenkov</p>
<p>Hans Ulrich Niedermann</p>
<p>Own Id: OTP-9442</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.21 -->
<section>
<title>SNMP Development Toolkit 4.20.1</title>
<p>Version 4.20.1 supports code replacement in runtime from/to
version 4.20, 4.19 and 4.18.</p>
<section>
<title>Improvements and new features</title>
<p>-</p>
<!--
<list type="bulleted">
<item>
<p>Added type specs for functions that do not return. </p>
<p>Kostis Sagonas</p>
<p>Own Id: OTP-9208</p>
</item>
</list>
-->
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Did not handle transport domains properly in some cases,
for instance trap sending. </p>
<p>Own Id: OTP-9400</p>
</item>
<item>
<p>[agent] Wrong default transport domain, snmpUDPDomain, instead
of transportDomainUdpIpv4. </p>
<p>Own Id: OTP-9425</p>
<p>Aux Id: Seq 11874</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.20.1 -->
<section>
<title>SNMP Development Toolkit 4.20</title>
<p>Version 4.20 supports code replacement in runtime from/to
version 4.19 and 4.18.</p>
<section>
<title>Improvements and new features</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>[agent] Added support for sending traps to IPv6 targets. </p>
<p>See the
<seealso marker="snmp_agent_config_files#target_addr">target address config file</seealso>,
the <seealso marker="snmpa_conf#target_addr_entry">target_addr_entry/11</seealso> function or
<seealso marker="snmp_target_mib#add_addr">add_addr/11</seealso> for more info. </p>
<p>Own Id: OTP-9088</p>
<p>Aux Id: Seq 11790</p>
</item>
<item>
<p>[agent] To be able to handle multiple engine-id(s) when
sending trap(s), the function
<seealso marker="snmp_community_mib#add_community">
add_community/6</seealso> has been added. </p>
<p>Own Id: OTP-9119</p>
<p>Aux Id: Seq 11792</p>
</item>
<item>
<p>[manager] The API for snmp requests has been augmented to
allow the caller to override some configuration. </p>
<p>This has been done by introducing a new set of API functions, see
<seealso marker="snmpm#sync_get2">sync_get2/3,4</seealso>,
<seealso marker="snmpm#async_get2">async_get2/3,4</seealso>,
<seealso marker="snmpm#sync_get_next2">sync_get_next2/3,4</seealso>,
<seealso marker="snmpm#async_get_next2">async_get_next2/3,4</seealso>,
<seealso marker="snmpm#sync_get_bulk2">sync_get_bulk2/5,6</seealso>,
<seealso marker="snmpm#async_get_bulk2">async_get_bulk2/5,6</seealso>,
<seealso marker="snmpm#sync_set2">sync_set2/3,4</seealso> and
<seealso marker="snmpm#async_set2">async_set2/3,4</seealso>
for more info. </p>
<p>Own Id: OTP-9162</p>
</item>
<item>
<p>[manager] The old API functions (for get and set
requests:
snmpm:g/3,4,5,6,7, snmpm:ag/3,4,5,6,7,
snmpm:gn/3,4,5,6,7, snmpm:agn/3,4,5,6,7,
snmpm:s/3,4,5,6,7, snmpm:s/3,4,5,6,7,
snmpm:gb/5,6,7,8,9 and snmpm:agb/5,6,7,8,9)
are now officially deprecated.
They will be removed as of R16B. </p>
<p>Own Id: OTP-9174</p>
</item>
<item>
<p>[agent] Pass extra info through the agent to the net-if
process when sending notifications. </p>
<p>See
<seealso marker="snmpa#send_notification2">
snmpa:send_notification2/3</seealso> for more info.
See also the incomming net-if messages when sending a
<seealso marker="snmp_agent_netif#im_send_pdu">trap</seealso>
(send_pdu message) and
<seealso marker="snmp_agent_netif#im_send_pdu_req">
notification</seealso> (send_pdu_req message). </p>
<p>Own Id: OTP-9183</p>
<p>Aux Id: Seq 11817</p>
</item>
<item>
<p>Added type specs for functions that do not return. </p>
<p>Kostis Sagonas</p>
<p>Own Id: OTP-9208</p>
</item>
</list>
</section>
<section>
<title>Fixed Bugs and Malfunctions</title>
<!--
<p>-</p>
-->
<list type="bulleted">
<item>
<p>Fixed endode/decode of values of type <c>Counter32</c>. </p>
<p>This type (<c>Counter32</c>) is an unsigned integer 32,
but is actually encoded as an signed integer 32.
The encode/decode functions however, treated it as if it was
encodeded as an unsigned integer 32. </p>
<p>Own Id: OTP-9022</p>
</item>
</list>
</section>
<section>
<title>Incompatibilities</title>
<p>-</p>
</section>
</section> <!-- 4.20 -->
<!-- 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>