Class IGMPv1
In: lib/l4/igmpv1.rb  (CVS)
Parent: RacketPart

$Id: igmpv1.rb 14 2008-03-02 05:42:30Z warchild $

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

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of the <organization> nor the
      names of its contributors may be used to endorse or promote products
      derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY Jon Hart ``AS IS’’ AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Jon Hart BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Internet Group Management Protocol, Version 1

RFC1112 (www.faqs.org/rfcs/rfc1112.html)

Methods

checksum!   checksum?   fix!  

Attributes

csum    Checksum
gaddr    Group Address
payload    Payload
type    Type
unused    Unused
version    Version (defaults to 1)

Public Instance methods

checksum!()

Compute and set the checkum for this IGMP message

[Source]

# File lib/l4/igmpv1.rb, line 52
  def checksum!
    self.csum = compute_checksum
  end
checksum?()

Check the checksum for this IGMP message

[Source]

# File lib/l4/igmpv1.rb, line 47
  def checksum?
    self.csum == 0 || (self.csum == compute_checksum)
  end
fix!()

Do whatever ‘fixing’ is neccessary in preparation for being sent

[Source]

# File lib/l4/igmpv1.rb, line 58
  def fix!
    self.checksum!
  end

[Validate]