packet.internet.ipv4 (3) Linux Manual Page

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'

See Also

baseobj(3), packet.transport.tcp(3), packet.transport.udp(3)

Bugs

No known bugs.

Author

Jorge Mora (mora [at] netapp.com)