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python libnet wrapper

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README
pylibnet - Python module for the libnet packet injection library
Copyright (C) 2009  Nadeem Douba

WELCOME

Thank you for trying out pylibnet. I hope it will be of
great value to you. The examples in this directory come
from the efforts of you (the people) and I have been 
inspired as of late to contribute to it as well. 

INSTALL

To install this module you will need to install the following:
	* libnet-1.1.x: to inject your packets.

All these prerequisites can be installed using apt-get, port, or fink.
Debian users can install the following packages to meet the pre-
requisite requirements:
	* build-essential
	* libnet1-dev
	* python-dev

For Mac OS/X users, please use the libnet libraries that come from
the Fink or MacPorts distribution. If you try to compile libnet in 
Mac OS/X you will run into a bug that causes "pblock not found" errors.
Mac OS/X users will have to install the following prerequisites 
in MacPorts:
  * libnet11
	* python25 (this is essential since Mac OS/X Python only runs 
              in 64-bit mode and the libnet lib is 32-bit only)

After installing python25 use the following command to make the 
MacPorts distro of Python active:

sudo python_select python25

Please let me know if we can improve this wrapper in any way. The
documentation is embedded in the library and can be accessed via
the help() function in the Python interpretter or pydoc.

Happy Injecting!

LIBNETERPRETER

lnsh is now part of the standard package for pylibnet. As part
of this package lnsh will be automatically installed to 
/usr/local/bin/lnsh for your hacking convenience. More details
about lnsh below.

EXAMPLES

The following examples require pylibnet, libnet and root 
access in order for them to work. The newest addition to
the examples directory is 'lnsh'. It is an interactive 
pylibnet console that provides a lot of shortcuts. 

Take a look at the example scripts in the lnsh directory. 
You can use this interpretter in interactive as well as 
scripted mode. A few things to note:

- In interactive mode functions with no parameters can 
  be called without the round brackets. For example,
  'ipv4' would create an ipv4 packet header with all 
  sorts of random defaults. However, In scripted mode 
  functions require paranthesis.

- The builders can be called without the 'autobuild_' and
  'build_' prefixes. For automatic functions use 'auto_<name>',
  and for non-automatic functions use just the '<name>'. For
  example, autobuild_arp translates to auto_arp, while
  build_ipv4 translates to ipv4. The old function names are
  available as well for backwards compatibility.

- The diagnostic functions can be used without the 'get'
  prefixes. For example, 'getpacket' translates to 'packet'
  and so on. Also the 'diag_*' functions can be called
  without the 'diag_' prefix. For example, 'diag_dump_context'
  is just 'dump_context'.

- Finally, the injection and device parameters for the context
  is specified at runtime. No need to build it within the
  script itself. In script mode you will need to either modify
  the she-bang (#!) line to specify the appropriate settings or
  specify them at runtime. For example, 'tcpsyn.libnet' can be 
  run using the '-i' parameter ('./tcpsyn.libnet -i eth1') or 
  without the '-i' parameter ('./tcpsyn.libnet') because of the
  she-bang ('#!/usr/local/bin/lnsh -i eth0 -t RAW4'). Additionally,
  lnsh scripts can have their own parameters. Take a look at how
  the dnsv4.libnet example script looks like for reference. The
  she-bang must have a '--' appended to the end of it to accept
  parameters (yes I know... it's ugly. but it works). For help in 
  interactive mode just run lnsh with -h for help or type 'help'
  at the command line.

Hope you will enjoy using lnsh as I thoroughly enjoyed coding 
it (yes... I have no life).


YOUR CONTRIBUTIONS OR IDEAS

Please feel free to contribute examples or ideas to this project.
Your effort would be greatly appreciated by myself and most 
importantly, the open source community. I can be reached at 
<ndouba at gmail dot com>.

THANK YOU

To all those who have contributed and provided bug reports.
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