packet.internet.ipv4 (3) - Linux Manuals

packet.internet.ipv4: IPv4 module

NAME

packet.internet.ipv4 - IPv4 module

DESCRIPTION

Decode IP version 4 layer.

CLASSES

class Flags(baseobj.BaseObj)

Flags object


Methods defined here:
---------------------

__init__(self, data)
Constructor which takes a single byte as input

class IPv4(baseobj.BaseObj)

IPv4 object

Usage:
    from packet.internet.ipv4 import IPv4

    x = IPv4(pktt)

Object definition:

IPv4(
    version         = int,
    IHL             = int, # Internet Header Length (in 32bit words)
    header_size     = int, # IHL in actual bytes
    DSCP            = int, # Differentiated Services Code Point
    ECN             = int, # Explicit Congestion Notification
    total_size      = int, # Total length
    id              = int, # Identification
    flags = Flags(         # Flags:
        DF = int,          #   Don't Fragment
        MF = int,          #   More Fragments
    )
    fragment_offset = int, # Fragment offset (in 8-byte blocks)
    TTL             = int, # Time to Live
    protocol        = int, # Protocol of next layer (RFC790)
    checksum        = int, # Header checksum
    src             = "%d.%d.%d.%d", # source IP address
    dst             = "%d.%d.%d.%d", # destination IP address
    options = string, # IP options if available
    data = string,    # Raw data of payload if protocol
                      # is not supported
)


Methods defined here:
---------------------

__init__(self, pktt)
Constructor

Initialize object's private data.


pktt:
Packet trace object (packet.pktt.Pktt) so this layer has
access to the parent layers.



__str__(self)
String representation of object

The representation depends on the verbose level set by debug_repr().
If set to 0 the generic object representation is returned.
If set to 1 the representation of the object is condensed:
    '192.168.0.20 -> 192.168.0.61 '

If set to 2 the representation of the object also includes the
protocol and length of payload:
    '192.168.0.20 -> 192.168.0.61, protocol: 17(UDP), len: 84'

BUGS

No known bugs.

AUTHOR

Jorge Mora (mora [at] netapp.com)