$ip_obj = NetPacket::IP->decode($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).
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.
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.
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.
The instance data for the NetPacket::IP object consists of the following fields.
The IP version number of this packet.
The IP header length of this packet.
The IP header flags for this packet.
The IP fragment offset for this packet.
The type-of-service for this IP packet.
The length (including length of header) in bytes for this packet.
The identification (sequence) number for this IP packet.
The time-to-live value for this packet.
The IP protocol number for this packet.
The IP checksum value for this packet.
The source IP address for this packet in dotted-quad notation.
The destination IP address for this packet in dotted-quad notation.
Any IP options for this packet.
The encapsulated data (payload) for this IP packet.