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Contents
#
# ARP processing routines
#
# Copyright (C) 2013 NEC Corporation
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, version 2, as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
class ARPEntry
include Trema::DefaultLogger
attr_reader :port
attr_reader :hwaddr
attr_writer :age_max
def initialize port, hwaddr, age_max
@port = port
@hwaddr = hwaddr
@age_max = age_max
@last_updated = Time.now
info "New entry: MAC addr = #{ @hwaddr.to_s }, port = #{ @port }"
end
def update port, hwaddr
@port = port
@hwaddr = hwaddr
@last_updated = Time.now
info "Update entry: MAC addr = #{ @hwaddr.to_s }, port = #{ @port }"
end
def aged_out?
aged_out = Time.now - @last_updated > @age_max
info "Age out: An ARP entry (MAC address = #{ @hwaddr.to_s }, port number = #{ @port }) has been aged-out" if aged_out
aged_out
end
end
class ARPTable
DEFAULT_AGE_MAX = 300
def initialize
@db = {}
end
def update port, ipaddr, hwaddr
entry = @db[ ipaddr.to_i ]
if entry
entry.update( port, hwaddr )
else
new_entry = ARPEntry.new( port, hwaddr, DEFAULT_AGE_MAX )
@db[ ipaddr.to_i ] = new_entry
end
end
def lookup ipaddr
@db[ ipaddr.to_i ]
end
def age
@db.delete_if do | ipaddr, entry |
entry.aged_out?
end
end
end
### Local variables:
### mode: Ruby
### coding: utf-8-unix
### indent-tabs-mode: nil
### End:
Version data entries
13 entries across 13 versions & 1 rubygems