Class CDP
In: lib/l3/cdp.rb  (CVS)
Parent: RacketPart

$Id: cdp.rb 14 2008-03-02 05:42:30Z warchild $

Copyright (c) 2008, Jon Hart All rights reserved.

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CDP — Cisco Discovery Protocol www.cisco.biz/univercd/cc/td/doc/product/lan/trsrb/frames.htm#xtocid12

Methods

add_field   checksum!   checksum?   fix!  

Attributes

csum    Checksum
payload    Payload of this CDP message. Generally untouched.
ttl    Time-to-live of the data in this message
version    CDP Version (generally 1)

Public Instance methods

add_field(type, value)

Add a new field to this CDP message.

[Source]

# File lib/l3/cdp.rb, line 41
  def add_field(type, value)# {{{
    t = TLV.new(2,2)
    t.type = type
    t.value = value
    t.length = 4 + value.length
    self.payload += t.encode   
  end# }}}
checksum!(

Compute and set the checksum for this IP datagram

[Source]

# File lib/l3/cdp.rb, line 55
  def checksum!# {{{
    self.csum = compute_checksum
  end# }}}
checksum?(

Check the checksum for this IP datagram

[Source]

# File lib/l3/cdp.rb, line 50
  def checksum?# {{{
    self.csum == compute_checksum
  end# }}}
fix!(

Fix this CDP message up for sending.

[Source]

# File lib/l3/cdp.rb, line 60
  def fix!# {{{
    self.checksum!
  end# }}}

[Validate]