SYNOPSIS
use NetPacket::IP;
$ip_obj = NetPacket::IP->decode($raw_pkt);
$ip_pkt = NetPacket::IP->encode($ip_obj);
$ip_data = NetPacket::IP::strip($raw_pkt);
NetPacket::IP provides a set of routines for assembling and disassembling packets using IP (Internet Protocol).
Methods
NetPacket::IP->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::IP->encode()
Return an IP packet encoded with the instance data specified. This will infer the total length of the packet automatically from the payload lenth and also adjust the checksum.
Functions
NetPacket::IP::strip([RAW PACKET])
Return the encapsulated data (or payload) contained in the IP 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.
Instance data
The instance data for the NetPacket::IP object consists of the following fields.
ver
The IP version number of this packet.
hlen
The IP header length of this packet.
flags
The IP header flags for this packet.
foffset
The IP fragment offset for this packet.
tos
The type-of-service for this IP packet.
len
The length (including length of header) in bytes for this packet.
id
The identification (sequence) number for this IP packet.
ttl
The time-to-live value for this packet.
proto
The IP protocol number for this packet.
cksum
The IP checksum value for this packet.
src_ip
The source IP address for this packet in dotted-quad notation.
dest_ip
The destination IP address for this packet in dotted-quad notation.
options
Any IP options for this packet.
data
The encapsulated data (payload) for this IP packet.
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Requirements:
· Perl
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