1NetPacket::Ethernet(3)User Contributed Perl DocumentationNetPacket::Ethernet(3)
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NAME

6       NetPacket::Ethernet - Assemble and disassemble ethernet packets.
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VERSION

9       version 1.2.0
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SYNOPSIS

12         use NetPacket::Ethernet;
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14         $eth_obj = NetPacket::Ethernet->decode($raw_pkt);
15         $eth_pkt = NetPacket::Ethernet->encode(params...);   # Not implemented
16         $eth_data = NetPacket::Ethernet::strip($raw_pkt);
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DESCRIPTION

19       "NetPacket::Ethernet" provides a set of routines for assembling and
20       disassembling packets using the Ethernet protocol.
21
22   Methods
23       "NetPacket::Ethernet->decode([RAW PACKET])"
24           Decode the raw packet data given and return an object containing
25           instance data.  This method will quite happily decode garbage
26           input.  It is the responsibility of the programmer to ensure valid
27           packet data is passed to this method.
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29       "NetPacket::Ethernet->encode(param => value)"
30           Return an ethernet packet encoded with the instance data specified.
31           Not implemented.
32
33   Functions
34       "NetPacket::Ethernet::strip([RAW PACKET])"
35           Return the encapsulated data (or payload) contained in the ethernet
36           packet.  This data is suitable to be used as input for other
37           "NetPacket::*" modules.
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39           This function is equivalent to creating an object using the
40           "decode()" constructor and returning the "data" field of that
41           object.
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43   Instance data
44       The instance data for the "NetPacket::Ethernet" object consists of the
45       following fields.
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47       src_mac
48           The source MAC address for the ethernet packet as a hex string.
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50       dest_mac
51           The destination MAC address for the ethernet packet as a hex
52           string.
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54       type
55           The protocol type for the ethernet packet.
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57       data
58           The payload for the ethernet packet.
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60   Exports
61       default
62           none
63
64       exportable
65           ETH_TYPE_IP ETH_TYPE_ARP ETH_TYPE_APPLETALK ETH_TYPE_SNMP
66           ETH_TYPE_IPv6 ETH_TYPE_PPP
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68       tags
69           The following tags group together related exportable items.
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71           ":types"
72               ETH_TYPE_IP ETH_TYPE_ARP ETH_TYPE_APPLETALK ETH_TYPE_SNMP
73               ETH_TYPE_IPv6 ETH_TYPE_PPP
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75           ":strip"
76               Import the strip function "eth_strip" which is an alias for
77               "NetPacket::Ethernet::strip"
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79           ":ALL"
80               All the above exportable items.
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EXAMPLE

83       The following script dumps ethernet frames by mac address and protocol
84       to standard output.
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86         #!/usr/bin/perl -w
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88         use strict;
89         use Net::PcapUtils;
90         use NetPacket::Ethernet;
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92         sub process_pkt {
93             my($arg, $hdr, $pkt) = @_;
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95             my $eth_obj = NetPacket::Ethernet->decode($pkt);
96             print("$eth_obj->{src_mac}:$eth_obj->{dest_mac} $eth_obj->{type}\n");
97         }
98
99         Net::PcapUtils::loop(\&process_pkt);
100

TODO

102       Implement "encode()" function
103

105       Copyright (c) 2001 Tim Potter and Stephanie Wehner.
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107       Copyright (c) 1995,1996,1997,1998,1999 ANU and CSIRO on behalf of the
108       participants in the CRC for Advanced Computational Systems ('ACSys').
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110       This module is free software.  You can redistribute it and/or modify it
111       under the terms of the Artistic License 2.0.
112
113       This program is distributed in the hope that it will be useful, but
114       without any warranty; without even the implied warranty of
115       merchantability or fitness for a particular purpose.
116

AUTHOR

118       Tim Potter <tpot@samba.org>
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122perl v5.12.3                      2011-07-30            NetPacket::Ethernet(3)
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