diff options
Diffstat (limited to 'lib/snmp/doc/src')
| -rw-r--r-- | lib/snmp/doc/src/notes.xml | 29 | ||||
| -rw-r--r-- | lib/snmp/doc/src/snmp_agent_netif.xml | 198 | ||||
| -rw-r--r-- | lib/snmp/doc/src/snmp_community_mib.xml | 26 | ||||
| -rw-r--r-- | lib/snmp/doc/src/snmpa.xml | 250 |
4 files changed, 321 insertions, 182 deletions
diff --git a/lib/snmp/doc/src/notes.xml b/lib/snmp/doc/src/notes.xml index c507965cd8..269a227530 100644 --- a/lib/snmp/doc/src/notes.xml +++ b/lib/snmp/doc/src/notes.xml @@ -35,7 +35,7 @@ <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> + version 4.19 and 4.18.</p> <section> <title>Improvements and new features</title> @@ -53,6 +53,16 @@ <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> @@ -82,11 +92,25 @@ </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> @@ -210,6 +234,7 @@ snmp_view_basec_acm_mib:vacmAccessTable(set, RowIndex, Cols). </section> <!-- 4.19 --> + <section> <title>SNMP Development Toolkit 4.18</title> <p>Version 4.18 supports code replacement in runtime from/to diff --git a/lib/snmp/doc/src/snmp_agent_netif.xml b/lib/snmp/doc/src/snmp_agent_netif.xml index 1f2dbe80db..d751740a82 100644 --- a/lib/snmp/doc/src/snmp_agent_netif.xml +++ b/lib/snmp/doc/src/snmp_agent_netif.xml @@ -1,4 +1,4 @@ -<?xml version="1.0" encoding="latin1" ?> +<?xml version="1.0" encoding="iso-8859-1" ?> <!DOCTYPE chapter SYSTEM "chapter.dtd"> <chapter> @@ -65,16 +65,19 @@ </section> <section> + <marker id="messages"></marker> <title>Messages</title> <p>The section <em>Messages</em> describes mandatory messages, which Net if must send and be able to receive. </p> <section> + <marker id="outgoing_messages"></marker> <title>Outgoing Messages</title> <p>Net if must send the following message when it receives an - SNMP PDU from the network that is aimed for the MasterAgent: - </p> + SNMP PDU from the network that is aimed for the MasterAgent: + </p> + <marker id="om_snmp_pdu"></marker> <pre> MasterAgent ! {snmp_pdu, Vsn, Pdu, PduMS, ACMData, From, Extra} </pre> @@ -106,9 +109,10 @@ MasterAgent ! {snmp_pdu, Vsn, Pdu, PduMS, ACMData, From, Extra} the request.</item> </list> <p>The following message is used to report that a response to a - request has been received. The only request an agent can send - is an Inform-Request. - </p> + request has been received. The only request an agent can send + is an Inform-Request. + </p> + <marker id="om_snmp_response_received"></marker> <pre> Pid ! {snmp_response_received, Vsn, Pdu, From} </pre> @@ -131,119 +135,153 @@ Pid ! {snmp_response_received, Vsn, Pdu, From} </section> <section> + <marker id="incoming_messages"></marker> <title>Incoming Messages</title> <p>This section describes the incoming messages which a Net if - process must be able to receive. - </p> + process must be able to receive. + </p> <list type="bulleted"> <item> + <marker id="im_snmp_response"></marker> <p><c>{snmp_response, Vsn, Pdu, Type, ACMData, To, Extra}</c></p> <p>This message is sent to the Net if process from a master agent as a response to a previously received request. </p> <list type="bulleted"> - <item><c>Vsn</c> is either <c>'version-1'</c>, - <c>'version-2'</c>, or <c>'version-3'</c>. + <item> + <p><c>Vsn</c> is either <c>'version-1'</c>, + <c>'version-2'</c>, or <c>'version-3'</c>. </p> </item> - <item><c>Pdu</c> is an SNMP PDU record (as defined in - snmp_types.hrl) with the SNMP response. + <item> + <p><c>Pdu</c> is an SNMP PDU record (as defined in + snmp_types.hrl) with the SNMP response. </p> </item> - <item><c>Type</c> is the <c>#pdu.type</c> of the original - request. + <item> + <p><c>Type</c> is the <c>#pdu.type</c> + of the original request. </p> </item> - <item><c>ACMData</c> is data used by the Access Control - Module in use. Normally this is just sent to - <c>snmpa_mpd:generate_response_message</c> (see Reference Manual). + <item> + <p><c>ACMData</c> is data used by the Access Control + Module in use. Normally this is just sent to + <c>snmpa_mpd:generate_response_message</c> + (see Reference Manual). </p> </item> - <item><c>To</c> is the destination address. If UDP over IP - is used, this should be a 2-tuple <c>{IP, UDPport}</c>, - where <c>IP</c> is a 4-tuple with the IP address, and - <c>UDPport</c> is an integer. + <item> + <p><c>To</c> is the destination address. If UDP over IP + is used, this should be a 2-tuple <c>{IP, UDPport}</c>, + where <c>IP</c> is a 4-tuple with the IP address, and + <c>UDPport</c> is an integer. </p> </item> - <item><c>Extra</c> is the term that the Net if process - sent to the agent when the request was sent to the agent. + <item> + <p><c>Extra</c> is the term that the Net if process + sent to the agent when the request was sent to the agent. </p> </item> </list> </item> <item> + <marker id="im_discarded_pdu"></marker> <p><c>{discarded_pdu, Vsn, ReqId, ACMData, Variable, Extra}</c></p> <p>This message is sent from a master agent if it for some - reason decided to discard the pdu. - </p> + reason decided to discard the pdu. </p> <list type="bulleted"> - <item><c>Vsn</c> is either <c>'version-1'</c>, - <c>'version-2'</c>, or <c>'version-3'</c>. + <item> + <p><c>Vsn</c> is either <c>'version-1'</c>, + <c>'version-2'</c>, or <c>'version-3'</c>. </p> </item> - <item><c>ReqId</c> is the request id of the original - request. + <item> + <p><c>ReqId</c> is the request id of the original request. </p> </item> - <item><c>ACMData</c> is data used by the Access Control - Module in use. Normally this is just sent to - <c>snmpa_mpd:generate_response_message</c> (see Reference Manual). + <item> + <p><c>ACMData</c> is data used by the Access Control + Module in use. Normally this is just sent to + <c>snmpa_mpd:generate_response_message</c> + (see Reference Manual). </p> </item> - <item><c>Variable</c> is the name of an snmp counter that - represents the error, e.g. <c>snmpInBadCommunityUses</c>. + <item> + <p><c>Variable</c> is the name of an snmp counter that + represents the error, e.g. <c>snmpInBadCommunityUses</c>. </p> </item> - <item><c>Extra</c> is the term that the Net if process - sent to the agent when the request was sent to the agent. + <item> + <p><c>Extra</c> is the term that the Net if process + sent to the agent when the request was sent to the agent. </p> </item> </list> </item> <item> - <p><c>{send_pdu, Vsn, Pdu, MsgData, To}</c></p> + <marker id="im_send_pdu"></marker> + <p><c>{send_pdu, Vsn, Pdu, MsgData, To, Extra}</c></p> <p>This message is sent from a master agent when a trap is - to be sent. - </p> + to be sent. </p> <list type="bulleted"> - <item><c>Vsn</c> is either <c>'version-1'</c>, - <c>'version-2'</c>, or <c>'version-3'</c>. + <item> + <p><c>Vsn</c> is either <c>'version-1'</c>, + <c>'version-2'</c>, or <c>'version-3'</c>.</p> </item> - <item><c>Pdu</c> is an SNMP PDU record (as defined in - snmp_types.hrl) with the SNMP response. + <item> + <p><c>Pdu</c> is an SNMP PDU record (as defined in + snmp_types.hrl) with the SNMP response. </p> + </item> + <item> + <p><c>MsgData</c> is the message specific data used in + the SNMP message. This value is normally sent to + <c>snmpa_mpd:generate_message/4</c>. In SNMPv1 and + SNMPv2c, this message data is the community string. In + SNMPv3, it is the context information. </p> </item> - <item><c>MsgData</c> is the message specific data used in - the SNMP message. This value is normally sent to - <c>snmpa_mpd:generate_message/4</c>. In SNMPv1 and - SNMPv2c, this message data is the community string. In - SNMPv3, it is the context information. + <item> + <p><c>To</c> is a list of the destination addresses and + their corresponding security parameters. This value is + normally sent to <c>snmpa_mpd:generate_message/4</c>. </p> </item> - <item><c>To</c> is a list of the destination addresses and - their corresponding security parameters. This value is - normally sent to <c>snmpa_mpd:generate_message/4</c>. + <item> + <p><c>Extra</c> is any term that the notification sender + wishes to pass to the Net if process when sending a notification + (see + <seealso marker="snmpa#send_notification2">send notification + </seealso> for more info). </p> </item> </list> </item> <item> - <p><c>{send_pdu_req, Vsn, Pdu, MsgData, To, Pid}</c></p> - <p>This <marker id="message"></marker> - message is sent from a master - agent when a request is - to be sent. The only request an agent can send is - Inform-Request. The net if process needs to remember the - request id and the Pid, and when a response is received for - the request id, send it to Pid, using a - <c>snmp_response_received</c> message. - </p> - <list type="bulleted"> - <item><c>Vsn</c> is either <c>'version-1'</c>, - <c>'version-2'</c>, or <c>'version-3'</c>. - </item> - <item><c>Pdu</c> is an SNMP PDU record (as defined in - snmp_types.hrl) with the SNMP response. - </item> - <item><c>MsgData</c> is the message specific data used in - the SNMP message. This value is normally sent to - <c>snmpa_mpd:generate_message/4</c>. In SNMPv1 and - SNMPv2c, this message data is the community string. In - SNMPv3, it is the context information. + <marker id="im_send_pdu_req"></marker> + <p><c>{send_pdu_req, Vsn, Pdu, MsgData, To, Pid, Extra}</c></p> + <p>This message is sent from a master agent when a request is to + be sent. The only request an agent can send is Inform-Request. + The net if process needs to remember the request id and the Pid, + and when a response is received for the request id, send it to Pid, + using a <c>snmp_response_received</c> message. </p> + <list type="bulleted"> + <item> + <p><c>Vsn</c> is either <c>'version-1'</c>, + <c>'version-2'</c>, or <c>'version-3'</c>.</p> + </item> + <item> + <p><c>Pdu</c> is an SNMP PDU record (as defined in + snmp_types.hrl) with the SNMP response. </p> + </item> + <item> + <p><c>MsgData</c> is the message specific data used in + the SNMP message. This value is normally sent to + <c>snmpa_mpd:generate_message/4</c>. In SNMPv1 and + SNMPv2c, this message data is the community string. In + SNMPv3, it is the context information. </p> + </item> + <item> + <p><c>To</c> is a list of the destination addresses and + their corresponding security parameters. This value is + normally sent to <c>snmpa_mpd:generate_message/4</c>. </p> + </item> + <item> + <p><c>Pid</c> is a process identifier. </p> + </item> + <item> + <p><c>Extra</c> is any term that the notification sender + wishes to pass to the Net if process when sending a notification + (see + <seealso marker="snmpa#send_notification2">send notification + </seealso> for more info). </p> </item> - <item><c>To</c> is a list of the destination addresses and - their corresponding security parameters. This value is - normally sent to <c>snmpa_mpd:generate_message/4</c>. - </item> - <item><c>Pid</c> is a process identifier. - </item> - </list> + </list> </item> </list> </section> diff --git a/lib/snmp/doc/src/snmp_community_mib.xml b/lib/snmp/doc/src/snmp_community_mib.xml index 7c7386af19..5e7bca3e27 100644 --- a/lib/snmp/doc/src/snmp_community_mib.xml +++ b/lib/snmp/doc/src/snmp_community_mib.xml @@ -1,10 +1,10 @@ -<?xml version="1.0" encoding="latin1" ?> +<?xml version="1.0" encoding="iso-8859-1" ?> <!DOCTYPE erlref SYSTEM "erlref.dtd"> <erlref> <header> <copyright> - <year>1999</year><year>2009</year> + <year>1999</year><year>2011</year> <holder>Ericsson AB. All Rights Reserved.</holder> </copyright> <legalnotice> @@ -35,11 +35,13 @@ <modulesummary>Instrumentation Functions for SNMP-COMMUNITY-MIB</modulesummary> <description> <p>The module <c>snmp_community_mib</c> implements the instrumentation - functions for the - SNMP-COMMUNITY-MIB, and functions for configuring the database. - </p> + functions for the SNMP-COMMUNITY-MIB, and functions for configuring the + database. </p> <p>The configuration files are described in the SNMP User's Manual.</p> + + <marker id="configure"></marker> </description> + <funcs> <func> <name>configure(ConfDir) -> void()</name> @@ -68,8 +70,11 @@ </p> <p>The configuration file read is: <c>community.conf</c>. </p> + + <marker id="reconfigure"></marker> </desc> </func> + <func> <name>reconfigure(ConfDir) -> void()</name> <fsummary>Configure the SNMP-COMMUNITY-MIB</fsummary> @@ -96,28 +101,35 @@ where the configuration files are found. </p> <p>The configuration file read is: <c>community.conf</c>.</p> + <marker id="add_community"></marker> </desc> </func> + <func> <name>add_community(Idx, CommName, SecName, CtxName, TransportTag) -> Ret</name> + <name>add_community(Idx, CommName, SecName, EngineId, CtxName, TransportTag) -> Ret</name> <fsummary>Added one community</fsummary> <type> <v>Idx = string()</v> <v>CommName = string()</v> <v>SecName = string()</v> + <v>EngineId = string()</v> <v>CtxName = string()</v> <v>TransportTag = string()</v> <v>Ret = {ok, Key} | {error, Reason}</v> <v>Key = term()</v> - <v>Reason = term()</v> + <v>Reason = term()</v> </type> <desc> <p>Adds a community to the agent config. - Equivalent to one line in the <c>community.conf</c> file.</p> + Equivalent to one line in the <c>community.conf</c> file.</p> + <p>With the <c>EngineId</c> argument it is possible to + override the configured engine-id (SNMP-FRAMEWORK-MIB).</p> <marker id="delete_community"></marker> </desc> </func> + <func> <name>delete_community(Key) -> Ret</name> <fsummary>Delete one community</fsummary> diff --git a/lib/snmp/doc/src/snmpa.xml b/lib/snmp/doc/src/snmpa.xml index 1d680e80f5..27d89ea4e3 100644 --- a/lib/snmp/doc/src/snmpa.xml +++ b/lib/snmp/doc/src/snmpa.xml @@ -872,10 +872,138 @@ snmp_agent:register_subagent(SA1,[1,2,3], SA2). then that sub-agent will be unregistered from all trees in <c>Agent</c>. </p> - <marker id="send_notification"></marker> + <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> @@ -907,18 +1035,19 @@ snmp_agent:register_subagent(SA1,[1,2,3], SA2). </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. 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). If no <c>ContextName</c> - is specified, the default <c>""</c> context is used. - </p> + 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> + 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> @@ -926,17 +1055,18 @@ snmp_agent:register_subagent(SA1,[1,2,3], SA2). </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> - - <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> @@ -1064,86 +1194,20 @@ snmp_agent:register_subagent(SA1,[1,2,3], SA2). (see SNMP-FRAMEWORK-MIB). </p> </note> -<!-- - <marker id="send_trap"></marker> ---> - <marker id="discovery"></marker> + <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>send_trap(Agent,Trap,Community)</name> - <name>send_trap(Agent,Trap,Community,Varbinds) -> void()</name> - <fsummary>Send a trap</fsummary> - <type> - <v>Agent = pid() | atom()</v> - <v>Trap = atom()</v> - <v>Community = string()</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> - </type> - <desc> - <p>Note! This function is only kept for backwards - compatibility reasons. Use <c>send_notification</c> instead. - </p> - <p>Sends the trap <c>Trap</c> to the managers defined for - <c>Community</c> in the <c>intTrapDestTable</c> in - OTP-SNMPEA-MIB. The optional argument <c>Varbinds</c> defines - values for the objects in the trap. 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 trap - 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 trap 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 trap, 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 trap 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 trap 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>snmp_error:user_err/2</c> - is called and the trap is discarded. </p> - - <marker id="discovery"></marker> - </desc> - </func> ---> <func> <name>discovery(TargetName, Notification) -> {ok, ManagerEngineID} | {error, Reason}</name> |