packet.pkt - Pkt module

Author

       Jorge Mora (mora@netapp.com)

NFStest 3.2                                       21 March 2023                                           PKT(3)

Bugs

       No known bugs.

Classes

classPkt(baseobj.BaseObj)
       Packet object

       Usage:
           from packet.pkt import Pkt

           x = Pkt()

           # Check if this is an NFS packet
           if x == 'nfs':
               print x.nfs

       Methodsdefinedhere:
       ---------------------

       __eq__(self,other)
       Comparison method used to determine if object has a given layer

       __init__(self)
       Constructor

       Initialize object's private data according to the arguments given.
       Arguments can be given as positional, named arguments or a
       combination of both.

       __ne__(self,other)
       Comparison method used to determine if object does not have a given layer

       __repr__(self)
       Formal string representation of packet object

       __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 is condensed into a single line.
       It contains, the frame number, IP source and destination and/or the
       last layer:
           '1 0.386615 192.168.0.62 -> 192.168.0.17 TCP 2049 -> 708, seq: 3395733180, ack: 3294169773, ACK,SYN'
           '5 0.530957 00:0c:29:54:09:ef -> ff:ff:ff:ff:ff:ff, type: 0x806'
           '19 0.434370 192.168.0.17 -> 192.168.0.62 NFS v4 COMPOUND4 call  SEQUENCE;PUTFH;GETATTR'

       If set to 2 the representation of the object is a line for each layer:
           'Pkt(
                RECORD:   frame 19 @ 0.434370 secs, 238 bytes on wire, 238 bytes captured
                ETHERNET: 00:0c:29:54:09:ef -> e4:ce:8f:58:9f:f4, type: 0x800(IPv4)
                IP:       192.168.0.17 -> 192.168.0.62, protocol: 6(TCP), len: 224
                TCP:      src port 708 -> dst port 2049, seq: 3294170673, ack: 3395734137, len: 172, flags: ACK,PSH
                RPC:      CALL(0), program: 100003, version: 4, procedure: 1, xid: 0x1437d3d5
                NFS:      COMPOUND4args(tag='', minorversion=1, argarray=[nfs_argop4(argop=OP_SEQUENCE, ...), ...])
            )'

       add_layer(self,name,layer)
       Add layer to name and object to the packet

       get_layers(self)
       Return the list of layers currently in the packet

Description

       Provides  the  object  for  a  packet  and  the  string representation of the packet.  This object has an
       attribute for each of the layers in the packet so each layer can be accessed directly  instead  of  going
       through   each   layer.   To  access  the  nfs  layer  object  you  can  use  'x.nfs'  instead  of  using
       'x.ethernet.ip.tcp.rpc.nfs' which would be very cumbersome to use. Also,  since  NFS  can  be  used  with
       either TCP or UDP it would be harder to access the nfs object independently of the protocol.

       Packet object attributes:
           Pkt(
               record   = Record information (frame number, etc.)
               ethernet = ETHERNET II (RFC 894) object
               ip       = IPv4 object
               tcp      = TCP object
               rpc      = RPC object
               nfs      = NFS object
           )