Sloth::Snmp is yet another wrapper library for snmp.

Features

  • Handles SNMP asynchronously.

  • By referring to the YAML file generated from the MIB file, you can operate without describing raw OID.

Installation

Add this line to your application’s Gemfile:

gem 'sloth/snmp'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install sloth-snmp
or
$ gem install -l sloth-snmp-x.x.x.gem

Usage

New

require  "sloth/snmp"

snmp  =  Sloth::Snmp.new
snmp  =  Sloth::Snmp.new( bind: 1161 )
snmp  =  Sloth::Snmp.new( bind: "127.0.0.1" )
snmp  =  Sloth::Snmp.new( bind: "192.168.0.1:1161" )
snmp  =  Sloth::Snmp.new( mibs: "RS-232-MIB.yaml" )
snmp  =  Sloth::Snmp.new( mibs: "spec/sloth/RFC1414-MIB.yaml" )

Get

require  "sloth/snmp"

snmp  =  Sloth::Snmp.new
peer  =  "127.0.0.1"
topics  =  [ "sysDescr.0", "sysUpTime.0", "sysName.0" ],
tuples  =  snmp.get( peer, topics )
tuples.each do |oid, tuple|
  p  tuple
end

Set

require  "sloth/snmp"

snmp  =  Sloth::Snmp.new
peer  =  "127.0.0.1"
tuple  =  { topic: "sysName.0", type: SNMP::OctetString, value: Time.now.to_s },
snmp.set( peer, tuple )

tuples  =  snmp.get( peer, tuple[:topic] )
tuples.each do |oid, tuple|
  p  tuple
end

Walk

require  "sloth/snmp"

snmp  =  Sloth::Snmp.new
peer  =  "127.0.0.1"
topic  =  "internet"
tuples  =  snmp.walk( peer, topic )
tuples.each do |oid, tuple|
  p  tuple
end

Trap

require  "sloth/snmp"

snmp  =  Sloth::Snmp.new( bind: 1162 )
snmp.trap( "snmpInTraps", "snmpOutTraps" ) do |trapname, source_ip, tuples|
  p [:trapname, trapname]
  p [:source_ip, source_ip]
  tuples.each do |oid, tuple|
    p  tuple
  end
end

sleep

Reference

Create a new Sloth::Snmp.

Sloth::Snmp.new( mibs: nil, bind: nil, rocommunity: "public", rwcommunity: "private" )

  • Result:

    • Sloth::Snmp object.

  • Parameter:

    • mibs: Additional MIB file path, or array of the paths. (default: nil)

    • bind: Bind host and port for trap. (default: "0.0.0.0:162")

    • rocommunity: Community string for Read Only. (default: "public")

    • rwcommunity: Community string for Read/Write. (default: "private")

SNMP Get.

Sloth::Snmp#get( peer, topics, community: nil, bindto: nil, device: nil )

  • Result:

  • Hash of key⇒oid, value⇒value.

  • Parameter:

    • peer: Target IP address and port. (default port: 162)

    • topics: Topic(s) for SNMP Get Request.

    • community: Community string. (default: nil)

    • bindto: Interface address. (default: nil)

    • device: Interface name. (default: nil)

SNMP Set.

Sloth::Snmp#set( peer, topics, community: nil, bindto: nil, device: nil )

  • Result:

  • Hash of key⇒oid, value⇒value.

  • Parameter:

    • peer: Target IP address and port. (default port: 162)

    • tuple: Hash of topic, type, value for SNMP Set Request.

    • community: Community string. (default: nil)

    • bindto: Interface address. (default: nil)

    • device: Interface name. (default: nil)

SNMP Walk.

Sloth::Snmp#walk( target, topic, port: 162, community: "public", bindto: nil, device: nil )

  • Result:

    • Hash of key⇒oid, value⇒value.

  • Parameter:

    • peer: Target IP address and port. (default port: 162)

    • topic: Topic for SNMP Get Next.

    • community: Community string. (default: nil)

    • bindto: Interface address. (default: nil)

    • device: Interface name. (default: nil)

SNMP Trap.

Sloth::Snmp#trap( *topics, &block )

  • Result:

    • nil.

  • Parameter:

    • topics: The topic(s) that enables trap monitoring.

    • block: Callback action.

SNMP Untrap.

Sloth::Snmp#untrap( *topics )

  • Result:

    • nil.

  • Parameter:

    • topics: The topic(s) that disables trap monitoring.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/arimay/sloth-snmp.

License

The gem is available as open source under the terms of the MIT License.

Copyright (c) ARIMA Yasuhiro <[email protected]>