---
name: "packet.pkt"
section: "3"
platform: "linux"
package: "nfstest"
version: "3.2-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/packet.pkt"
---

# packet.pkt(3)

Pkt module

## NAME

packet.pkt - Pkt module

## 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\
     )

## CLASSES

### class Pkt(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
```

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

**\_\_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

## SEE ALSO

**[baseobj(3)](/baseobj/3.md)**

## BUGS

No known bugs.

## AUTHOR

Jorge Mora (mora@netapp.com)