20042009 Ericsson AB. All Rights Reserved. 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. snmpm_mpd snmpm_mpd.xml
snmpm_mpd Message Processing and Dispatch module for the SNMP manager

The module snmpm_mpd implements the version independent Message Processing and Dispatch functionality in SNMP for the manager. It is supposed to be used from a Network Interface process (Definition of Manager Net if).

init_mpd(Vsns) -> mpd_state() Initialize the MPD module Vsns = [Vsn] Vsn = v1 | v2 | v3

This function can be called from the net_if process at start-up. The options list defines which versions to use.

It also initializes some SNMP counters.

process_msg(Msg, TDomain, Addr, Port, State, NoteStore, Logger) -> {ok, Vsn, Pdu, PduMS, MsgData} | {discarded, Reason} Process a message received from the network Msg = binary() TDomain = snmpUDPDomain Addr = {integer(), integer(), integer(), integer()} Port = integer() State = mpd_state() NoteStore = pid() Logger = function() Vsn = 'version-1' | 'version-2' | 'version-3' Pdu = #pdu PduMs = integer() MsgData = term()

Processes an incoming message. Performs authentication and decryption as necessary. The return values should be passed the manager server.

NoteStore is the pid() of the note-store process.

Logger is the function used for audit trail logging.

In the case when the pdu type is report, MsgData is either ok or {error, ReqId, Reason}.

generate_msg(Vsn, NoteStore, Pdu, MsgData, Logger) -> {ok, Packet} | {discarded, Reason} Generate a request message to be sent to the network Vsn = 'version-1' | 'version-2' | 'version-3' NoteStore = pid() Pdu = #pdu MsgData = term() Logger = function() Packet = binary() Reason = term()

Generates a possibly encrypted packet to be sent to the network.

NoteStore is the pid() of the note-store process.

MsgData is the message specific data used in the SNMP message. In SNMPv1 and SNMPv2c, this message data is the community string. In SNMPv3, it is the context information.

Logger is the function used for audit trail logging.

generate_response_msg(Vsn, Pdu, MsgData, Logger) -> {ok, Packet} | {discarded, Reason} Generate a response packet to be sent to the network Vsn = 'version-1' | 'version-2' | 'version-3' Pdu = #pdu MsgData = term() Logger = function() Packet = binary() Reason = term()

Generates a possibly encrypted response packet to be sent to the network.

MsgData is the message specific data used in the SNMP message. This value is received from the process_msg function.