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Net::Packet::VLAN(3) User Contributed Perl Documentation Net::Packet::VLAN(3)
 

Net::Packet::VLAN - 802.1Q layer 3 object

   use Net::Packet::Consts qw(:vlan);
   require Net::Packet::VLAN;
   # Build a layer
   my $layer = Net::Packet::VLAN->new(
      priority => 0,
      cfi      => 0,
      id       => 0,
      type     => NP_VLAN_TYPE_IPv4,
   );
   $layer->pack;
   print 'RAW: '.unpack('H*', $layer->raw)."\n";
   # Read a raw layer
   my $layer = Net::Packet::VLAN->new(raw => $raw);
   print $layer->print."\n";
   print 'PAYLOAD: '.unpack('H*', $layer->payload)."\n"
      if $layer->payload;

This modules implements the encoding and decoding of the Virtual LAN/802.1Q layer.
Details: http://standards.ieee.org/getieee802/802.1.html
See also Net::Packet::Layer and Net::Packet::Layer3 for other attributes and methods.

priority
The priority field.
cfi
The cfi field. It is only one bit long, so set it to 0 or 1.
id
VLAN tag id. You'll love it.
type
Which type the next encapsulated layer is.
frame
This is a Net::Packet::Frame object, built it like any other such frame. Just to mention that you should use dnoFexLien attribute if you put in a Net::Packet::IPv4 layer.

new
Object constructor. You can pass attributes that will overwrite default ones. Default values:
priority: 0
cfi: 0
id: 0
type: NP_VLAN_TYPE_IPv4
pack
Packs all attributes into a raw format, in order to inject to network. Returns 1 on success, undef otherwise.
unpack
Unpacks raw data from network and stores attributes into the object. Returns 1 on success, undef otherwise.
isTypeArp
isTypeIpv4
isTypeIpv6
isTypeIp - is type IPv4 or IPv6
isTypeVlan
Helper methods. Return true is the encapsulated layer is of specified type, false otherwise.

Load them: use Net::Packet::Consts qw(:vlan);
NP_VLAN_TYPE_ARP
NP_VLAN_TYPE_IPv4
NP_VLAN_TYPE_IPv6
NP_VLAN_TYPE_VLAN
Various supported encapsulated frame types.

Patrice <GomoR> Auffret

Copyright (c) 2004-2009, Patrice <GomoR> Auffret
You may distribute this module under the terms of the Artistic license. See LICENSE.Artistic file in the source distribution archive.

NetPacket, Net::RawIP, Net::RawSock
2009-11-09 perl v5.28.1

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