75 lines
1.9 KiB
Ruby
75 lines
1.9 KiB
Ruby
#
|
|
# Copyright (c) 2004 David R. Halliday
|
|
# All rights reserved.
|
|
#
|
|
# This SNMP library is free software. Redistribution is permitted under the
|
|
# same terms and conditions as the standard Ruby distribution. See the
|
|
# COPYING file in the Ruby distribution for details.
|
|
#
|
|
|
|
require 'snmp'
|
|
require 'socket'
|
|
require 'logger'
|
|
|
|
module SNMP
|
|
|
|
class Agent #:nodoc:all
|
|
|
|
def initialize(listen_port=161, max_packet=8000)
|
|
@log = Logger.new(STDOUT)
|
|
@log.level = Logger::DEBUG
|
|
@max_packet = max_packet
|
|
@socket = UDPSocket.open
|
|
@socket.bind(nil, listen_port)
|
|
@mib = MIB::SystemMIB.new
|
|
end
|
|
|
|
def start
|
|
@log.info "SNMP agent running"
|
|
loop do
|
|
begin
|
|
data, remote_info = @socket.recvfrom(@max_packet)
|
|
puts "Received #{data.length} bytes"
|
|
p data
|
|
message = Message.decode(data)
|
|
case message.pdu
|
|
when GetRequest
|
|
response = message.response
|
|
response.pdu.varbind_list.each do |v|
|
|
v.value = @mib.get(v.name)
|
|
end
|
|
when SetRequest
|
|
response = message.response
|
|
else
|
|
raise "invalid message #{message.to_s}"
|
|
end
|
|
puts "Responding to #{remote_info[3]}:#{remote_info[1]}"
|
|
encoded_message = response.encode
|
|
n=@socket.send(encoded_message, 0, remote_info[3], remote_info[1])
|
|
p encoded_message
|
|
rescue => e
|
|
@log.error e
|
|
shutdown
|
|
end
|
|
end
|
|
end
|
|
|
|
def shutdown
|
|
@log.info "SNMP agent stopping"
|
|
@socket.close
|
|
exit
|
|
end
|
|
|
|
alias stop :shutdown
|
|
|
|
end
|
|
|
|
end
|
|
|
|
if $0 == __FILE__
|
|
agent = SNMP::Agent.new(1061)
|
|
trap("INT") { agent.shutdown }
|
|
agent.start
|
|
end
|
|
|