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diff --git a/lib/snmp/doc/src/snmpa_mib_data.xml b/lib/snmp/doc/src/snmpa_mib_data.xml new file mode 100644 index 0000000000..ff07a03b98 --- /dev/null +++ b/lib/snmp/doc/src/snmpa_mib_data.xml @@ -0,0 +1,392 @@ +<?xml version="1.0" encoding="iso-8859-1" ?> +<!DOCTYPE erlref SYSTEM "erlref.dtd"> + +<erlref> + <header> + <copyright> + <year>2013</year><year>2013</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_mib_data</title> + <prepared></prepared> + <docno></docno> + <date></date> + <rev></rev> + <file>snmpa_mib_data.xml</file> + </header> + + <module>snmpa_mib_data</module> + <modulesummary>Behaviour module for the SNMP agent mib-server + data module.</modulesummary> + <description> + <p>This module defines the behaviour of the SNMP agent mib-server + data module. A <c>snmpa_mib_data</c> compliant module + must export the following functions: </p> + <list type="bulleted"> + <item> + <seealso marker="#new">new/1</seealso> + </item> + <item> + <seealso marker="#close">close/1</seealso> + </item> + <item> + <seealso marker="#sync">sync/1</seealso> + </item> + <item> + <seealso marker="#load_mib">load_mib/4</seealso> + </item> + <item> + <seealso marker="#unload_mib">unload_mib/4</seealso> + </item> + <item> + <seealso marker="#lookup">lookup/2</seealso> + </item> + <item> + <seealso marker="#next">next/3</seealso> + </item> + <item> + <seealso marker="#register_subagent">register_subagent/3</seealso> + </item> + <item> + <seealso marker="#unregister_subagent">unregister_subagent/2</seealso> + </item> + <item> + <seealso marker="#which_mib">which_mib/2</seealso> + </item> + <item> + <seealso marker="#which_mibs">which_mibs/1</seealso> + </item> + <item> + <seealso marker="#whereis_mib">whereis_mib/2</seealso> + </item> + <item> + <seealso marker="#dump">dump/2</seealso> + </item> + <item> + <seealso marker="#info">info/1</seealso> + </item> + <item> + <seealso marker="#backup">backup/2</seealso> + </item> + <item> + <seealso marker="#code_change">code_change/4</seealso> + </item> + </list> + + <p>The semantics of them and their exact signatures are + explained below. </p> + + <p>Note that the data extracted from the imported (loaded) + mibs are stored partly by the mib-server and partly by the + symbolic-store server. See the default mib-server data + module, <c>snmpa_mib_data_tttn</c> for details. </p> + + </description> + + <section> + <title>CALLBACK FUNCTIONS</title> + <p>The following functions must be exported from a + <c>mib-server</c> data callback module: </p> + + <marker id="new"></marker> + </section> + + <funcs> + <func> + <name>Module:new(Storage) -> State</name> + <fsummary>Create new (mib-server) data instance</fsummary> + <type> + <v>Storage = mib_storage()</v> + <v>State = term()</v> + </type> + <desc> + <p>Create a new mib-server data instance. </p> + + <marker id="close"></marker> + </desc> + </func> + + <func> + <name>Module:close(State) -> void()</name> + <fsummary>Close the mib-server data instance</fsummary> + <type> + <v>State = term()</v> + </type> + <desc> + <p>Close the mib-storage.</p> + + <marker id="sync"></marker> + </desc> + </func> + + <func> + <name>Module:sync(State) -> void()</name> + <fsummary>Synchronize to disc</fsummary> + <type> + <v>State = term()</v> + </type> + <desc> + <p>Synchronize (write to disc, if possible) the mib-server data. + This depends on the <c>mib_storage</c> option, and will only have + an effect if the mib-storage option has an actual disc component + (such as dets, or ets with a file). </p> + + <marker id="load_mib"></marker> + </desc> + </func> + + <func> + <name>Module:load_mib(State, Filename, MeOverride, TeOverride) -> {ok, NewState} | {error, Reason}</name> + <fsummary>Load a mib into the mib-server</fsummary> + <type> + <v>State = NewState = term()</v> + <v>Filename = filename()</v> + <v>MeOverride = boolean()</v> + <v>TeOverride = boolean()</v> + <v>Reason = already_loaded | term()</v> + </type> + <desc> + <p>Load the mib specified by the <c>Filename</c> argument + into the mib-server. + The <c>MeOverride</c> and <c>TeOverride</c> arguments + specifies how the mib-server shall handle duplicate mib- and trap- + entries. </p> + + <marker id="unload_mib"></marker> + </desc> + </func> + + <func> + <name>Module:unload_mib(State, Filename) -> {ok, NewState} | {error, Reason}</name> + <fsummary>Unload mib from the mib-server</fsummary> + <type> + <v>State = NewState = term()</v> + <v>Filename = filename()</v> + <v>Reason = not_loaded | term()</v> + </type> + <desc> + <p>Unload the mib specified by the <c>Filename</c> argument + from the mib-server. </p> + + <marker id="lookup"></marker> + </desc> + </func> + + <func> + <name>Module:lookup(State, Oid) -> Reply</name> + <fsummary>Find the mib-entry corresponding to the Oid</fsummary> + <type> + <v>State = term()</v> + <v>Reply = {variable, ME} | {table_column, ME, TEOid} | {subagent, SAPid, SAOid} | {false, Reason}</v> + <v>Oid = TEOid = SAOid = oid()</v> + <v>SAPid = pid()</v> + <v>ME = me()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Find the mib-entry corresponding to the <c>Oid</c>. + If it is a variable, the <c>Oid</c> must be + <Oid for var>.0 + and if it is a table, <c>Oid</c> must be + <table>.<entry>.<col>.<any>.</p> + + <marker id="next"></marker> + </desc> + </func> + + <func> + <name>Module:next(State, Oid, MibView) -> Reply</name> + <fsummary>Finds the lexicographically next oid</fsummary> + <type> + <v>State = term()</v> + <v>Reply = false | endOfTable | {subagent, SAPid, SAOid} | {variable, ME, VarOid} | {table, TableOid, TableRestOid, ME}</v> + <v>Oid = SAOid = VarOid = TableOid = TableRestOid = oid()</v> + <v>SAPid = pid()</v> + <v>ME = me()</v> + </type> + <desc> + <p>Finds the lexicographically next oid. </p> + + <marker id="register_subagent"></marker> + </desc> + </func> + + <func> + <name>Module:register_subagent(State, Oid, Pid) -> Reply</name> + <fsummary>Register the subagent</fsummary> + <type> + <v>State = NewState = term()</v> + <v>Reply = {ok, NewState} | {error, Reason}</v> + <v>Oid = oid()</v> + <v>Pid = pid()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Register the subagent, process, + handling part of the mib-tree. </p> + + <marker id="unregister_subagent"></marker> + </desc> + </func> + + <func> + <name>Module:unregister_subagent(State, PidOrOid) -> Reply</name> + <fsummary>Unregister the subagent</fsummary> + <type> + <v>State = NewState = term()</v> + <v>Reply = {ok, NewState} | {ok, NewState, Pid} | {error, Reason}</v> + <v>PidOrOid = pid() | oid()</v> + <v>Pid = pid()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Unregister the subagent, handling part of the mib-tree, + as specified by the <c>oid()</c> or <c>pid()</c> + (<c>PidOrOid</c>). </p> + <p>When unregister the subagent using an <c>oid()</c>, the <c>pid()</c> + of the process handling the sub-tree is also returned. </p> + + <marker id="dump"></marker> + </desc> + </func> + + <func> + <name>Module:dump(State, Destination) -> Reply</name> + <fsummary>Unregister the subagent</fsummary> + <type> + <v>State = term()</v> + <v>Reply = ok | {error, Reason}</v> + <v>Destination = io | filename()</v> + <v>Pid = pid()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Dump the mib-server data to <c>stdio</c> (Destination = <c>io</c>) or + the specified file. </p> + + <marker id="which_mib"></marker> + </desc> + </func> + + <func> + <name>Module:which_mib(State, Oid) -> Reply</name> + <fsummary>Retrieve the mib file for an oid()</fsummary> + <type> + <v>State = term()</v> + <v>Reply = {ok, MibFile} | {error, Reason}</v> + <v>Oid = oid()</v> + <v>MibFile = string()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Retrieve the mib-file to which an given <c>oid()</c> belongs. </p> + + <marker id="which_mibs"></marker> + </desc> + </func> + + <func> + <name>Module:which_mibs(State) -> Reply</name> + <fsummary>Retrieve all loaded mib files</fsummary> + <type> + <v>State = term()</v> + <v>Reply = [{MibName, Filename}]</v> + <v>MibName = atom()</v> + <v>Filename = string()</v> + </type> + <desc> + <p>Retrieve all loaded mib-files. </p> + + <marker id="whereis_mib"></marker> + </desc> + </func> + + <func> + <name>Module:whereis_mib(State, MibName) -> Reply</name> + <fsummary>Retrieve the mib file for the mib</fsummary> + <type> + <v>State = term()</v> + <v>MibName = atom()</v> + <v>Reply = {ok, Filename} | {error, Reason}</v> + <v>Filename = string()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Retrieve the mib file for the mib. </p> + + <marker id="info"></marker> + </desc> + </func> + + <func> + <name>Module:info(State) -> Reply</name> + <fsummary>Retrieve misc info for the mib data</fsummary> + <type> + <v>State = term()</v> + <v>Reply = {ok, Filename} | {error, Reason}</v> + <v>Filename = string()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Retrieve misc info for the mib data. </p> + <p>This is a utility function used to inspect, for instance, + memory usage, in a simple way. </p> + + <marker id="backup"></marker> + </desc> + </func> + + <func> + <name>Module:backup(State, BackupDir) -> Reply</name> + <fsummary>Perform a backup of the mib-server data</fsummary> + <type> + <v>State = term()</v> + <v>Reply = ok | {error, Reason}</v> + <v>BackupDir = string()</v> + <v>Reason = term()</v> + </type> + <desc> + <p>Perform a backup of the mib-server data. </p> + <p>Note that its implementation dependant (and also + dependent on mib-storage is used) if a backup is possible. </p> + + <marker id="code_change"></marker> + </desc> + </func> + + <func> + <name>Module:code_change(Destination, Vsn, Extra, State) -> NewState</name> + <fsummary>Perform a code-change</fsummary> + <type> + <v>Destination = up | down</v> + <v>Vsn = term()</v> + <v>Extra = term()</v> + <v>State = NewState = term()</v> + </type> + <desc> + <p>Perform a code-change (upgrade or downgrade). </p> + <p>See + <seealso marker="gen_server">gen_server</seealso> + for more info regarding the <c>Vsn</c> and <c>Extra</c> arguments. </p> + + </desc> + </func> + + </funcs> + +</erlref> + |