Class: SnmpAnalyzer

Inherits:
Object
  • Object
show all
Defined in:
lib/monitor/server/snmp/snmptrap_analyzer.rb

Instance Method Summary collapse

Constructor Details

#initialize(buff) ⇒ SnmpAnalyzer

Returns a new instance of SnmpAnalyzer.



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# File 'lib/monitor/server/snmp/snmptrap_analyzer.rb', line 4

def initialize(buff)
  @buff=buff

@mib=SNMP::MIB.new()
libs=["SNMPv2-SMI", "SNMPv2-MIB", "IF-MIB", "IP-MIB", "TCP-MIB", "UDP-MIB"]
libs.each do |lb|
@mib.load_module(lb)
end
  @sender = Thread.start do
   while $config.snmptrap_mon
         send_messages if buff.full?
         sleep(1)
  Thread.pass
   end
  end
  $log.debug("end of SnmpAnalyzer thread")
end

Instance Method Details

#get_thread ⇒ Object 



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# File 'lib/monitor/server/snmp/snmptrap_analyzer.rb', line 22

def get_thread
  @sender
end

#send_messages ⇒ Object 



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# File 'lib/monitor/server/snmp/snmptrap_analyzer.rb', line 39

def send_messages
  while @buff.has_more?
    snmptrap_msg=@buff.get
if snmptrap_msg != nil
  src=snmptrap_msg.source_ip
  if $host[src] != nil && $host[src].snmptrap_monitoring.size() > 0
    find_oid_val=nil
    snmptrap_vers=0
    if snmptrap_msg.class == SNMP::SNMPv2_Trap
     snmptrap_vers=2
     find_oid_val=snmptrap_msg.trap_oid().join('.')
    elsif SNMP::SNMPv1_Trap
     snmptrap_vers=1
     find_oid_val=snmptrap_msg.enterprise.join('.')
     if snmptrap_msg.generic_trap() == :enterpriseSpecific
        find_oid_val="#{find_oid_val}.6.#{snmptrap_msg.specific_trap}"
     else
       find_oid_val="#{find_oid_val}."+snmptrap_msg.generic_trap()
     end
    else 
      $log.error("unkwown Snmp Trap version")
    end
    if find_oid_val != nil
     $host[src].snmptrap_monitoring.each_value do |snmptrap_mon|
       if snmptrap_mon.active?() 
          trap_ref_value=to_oid($snmptrap_refs[snmptrap_mon.get_snmptrap_ref()].get_oid())
         find_oid_value=to_oid(find_oid_val)
         if (trap_ref_value == find_oid_value) && (find_oid_value!=nil)
          $event_win.add_event(EventWindow::TRAP_EVENT_TYPE, get_level_from_status($status[snmptrap_mon.raw_severity()-1]), $host[src], "Snmp Trap(v#{snmptrap_vers}): #{$snmptrap_refs[snmptrap_mon.get_snmptrap_ref()].name}")
          if $status_value[snmptrap_mon.raw_severity()-1] > $host[src].trap_sev
            $host[src].set_trap_severity(snmptrap_mon.raw_severity()-1)
          end              
          break
         end
       end
     end
    end
  end
end
end
end

#to_oid(oid_name) ⇒ Object

convert oid_name to oid, return nil if error



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# File 'lib/monitor/server/snmp/snmptrap_analyzer.rb', line 29

def to_oid(oid_name)
  oid=nil
  begin
    oid=@mib.oid(oid_name).to_s
  rescue
    $log.error("SNMP trap: dont understand #{oid_name}")
  end
  return oid
end