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Net::Packet::TCP.3pm
Langue: en
Version: 2006-11-23 (mandriva - 01/05/08)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
Net::Packet::TCP - Transmission Control Protocol layer 4 objectSYNOPSIS
use Net::Packet::Consts qw(:tcp); require Net::Packet::TCP; # Build a layer my $layer = Net::Packet::TCP->new( dst => 22, options => "\x02\x04\x05\xb4", # MSS=1460 ); $layer->pack; print 'RAW: '.unpack('H*', $layer->raw)."\n"; # Read a raw layer my $layer = Net::Packet::TCP->new(raw => $raw); print $layer->print."\n"; print 'PAYLOAD: '.unpack('H*', $layer->payload)."\n" if $layer->payload;
DESCRIPTION
This modules implements the encoding and decoding of the TCP layer.RFC: ftp://ftp.rfc-editor.org/in-notes/rfc793.txt
See also Net::Packet::Layer and Net::Packet::Layer4 for other attributes and methods.
ATTRIBUTES
- src
- dst
- Source and destination ports.
- flags
- TCP flags, see CONSTANTS.
- win
- The window size.
- seq
- ack
- Sequence and acknowledgment numbers.
- off
- The size in number of words of the TCP header.
- x2
- Reserved field.
- checksum
- The TCP header checksum.
- urp
- Urgent pointer.
- options
- TCP options, as a hexadecimal string.
METHODS
- new
- Object constructor. You can pass attributes that will overwrite default ones. Default values:
src: getRandomHighPort()
dst: 0
seq: getRandom32bitsInt()
ack: 0
x2: 0
off: 0
flags: NP_TCP_FLAG_SYN
win: 0xffff
checksum: 0
urp: 0
options: ""
- recv
- Will search for a matching replies in framesSorted or frames from a Net::Packet::Dump object.
- 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.
- getHeaderLength
- Returns the header length in bytes, not including TCP options.
- getOptionsLength
- Returns options length in bytes.
- haveFlagFin
- haveFlagSyn
- haveFlagRst
- haveFlagPsh
- haveFlagAck
- haveFlagUrg
- haveFlagEce
- haveFlagCwr
- Returns 1 if the specified TCP flag is set in flags attribute, 0 otherwise.
CONSTANTS
Load them: use Net::Packet::Consts qw(:tcp);- NP_TCP_FLAG_FIN
- NP_TCP_FLAG_SYN
- NP_TCP_FLAG_RST
- NP_TCP_FLAG_PSH
- NP_TCP_FLAG_ACK
- NP_TCP_FLAG_URG
- NP_TCP_FLAG_ECE
- NP_TCP_FLAG_CWR
- TCP flag constants.
AUTHOR
Patrice <GomoR> AuffretCOPYRIGHT AND LICENSE
Copyright (c) 2004-2006, Patrice <GomoR> AuffretYou may distribute this module under the terms of the Artistic license. See LICENSE.Artistic file in the source distribution archive.
RELATED MODULES
NetPacket, Net::RawIP, Net::RawSockContenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre