GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
NetPacket::Ethernet(3) User Contributed Perl Documentation NetPacket::Ethernet(3)

NetPacket::Ethernet - Assemble and disassemble ethernet packets.

version 1.6.0

  use NetPacket::Ethernet;

  $eth_obj = NetPacket::Ethernet->decode($raw_pkt);
  $eth_pkt = NetPacket::Ethernet->encode(params...);   # Not implemented
  $eth_data = NetPacket::Ethernet::strip($raw_pkt);

"NetPacket::Ethernet" provides a set of routines for assembling and disassembling packets using the Ethernet protocol.

"NetPacket::Ethernet->decode([RAW PACKET])"
Decode the raw packet data given and return an object containing instance data. This method will quite happily decode garbage input. It is the responsibility of the programmer to ensure valid packet data is passed to this method.
"NetPacket::Ethernet->encode(param => value)"
Return an ethernet packet encoded with the instance data specified. Not implemented.

"NetPacket::Ethernet::strip([RAW PACKET])"
Return the encapsulated data (or payload) contained in the ethernet packet. This data is suitable to be used as input for other "NetPacket::*" modules.

This function is equivalent to creating an object using the "decode()" constructor and returning the "data" field of that object.

The instance data for the "NetPacket::Ethernet" object consists of the following fields.
src_mac
The source MAC address for the ethernet packet as a hex string.
dest_mac
The destination MAC address for the ethernet packet as a hex string.
type
The protocol type for the ethernet packet.
data
The payload for the ethernet packet.

default
none
exportable
ETH_TYPE_IP ETH_TYPE_ARP ETH_TYPE_APPLETALK ETH_TYPE_SNMP ETH_TYPE_IPv6 ETH_TYPE_PPP
tags
The following tags group together related exportable items.
":types"
ETH_TYPE_IP ETH_TYPE_ARP ETH_TYPE_APPLETALK ETH_TYPE_SNMP ETH_TYPE_IPv6 ETH_TYPE_PPP
":strip"
Import the strip function "eth_strip" which is an alias for "NetPacket::Ethernet::strip"
":ALL"
All the above exportable items.

The following script dumps ethernet frames by mac address and protocol to standard output.

  #!/usr/bin/perl -w

  use strict;
  use Net::PcapUtils;
  use NetPacket::Ethernet;

  sub process_pkt {
      my($arg, $hdr, $pkt) = @_;

      my $eth_obj = NetPacket::Ethernet->decode($pkt);
      print("$eth_obj->{src_mac}:$eth_obj->{dest_mac} $eth_obj->{type}\n");
  }

  Net::PcapUtils::loop(\&process_pkt);

Implement "encode()" function

Copyright (c) 2001 Tim Potter and Stephanie Wehner.

Copyright (c) 1995,1996,1997,1998,1999 ANU and CSIRO on behalf of the participants in the CRC for Advanced Computational Systems ('ACSys').

This module is free software. You can redistribute it and/or modify it under the terms of the Artistic License 2.0.

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.

Tim Potter <tpot@samba.org>
2015-03-13 perl v5.32.1

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.