A python module for handling ICMP messaging for the RPL protocol

This module allows easy creation of ICMPv6 socket in Python tailored to send RPL messages. Non-RPL message (message type != 155) are filtered out and are thus not received by the socket. The RplSocket object contains a send() and receive() methods to send and receives raw ICMP messages (i.e. you have to build the header by yourself).

How to install

The source directory contains a make file with a rpm target. This target created a RPM package that will be located in the dist directory that makes deployment of the library easier.

I'm not very sure what is the proper way to install Cython packages because I use exclusively the RPM built for my own needs. My best guess is that the following line should suffice:

apt-get install libcap-dev # install dependancy
make                       # to build the library files
python setup.py install    # install the package

Dependencies

• Cython
• libcap

Examples of code

Building a simple RPL ICMP client

import RplIcmp
import random
from time import sleep
r = RplIcmp.RplSocket("eth0")
message_header = "\x9b\x01\x00\x00"
while True:
	message = "".join([ chr(random.randrange(255)) for x in range(100) ])
	r.send("fe80::1", message_header + message)
	print "sent one message"
	sleep(0.1)
    ```


### Building a simple RPL ICMP server

```python
import RplIcmp
r = RplIcmp.RplSocket("eth0")
while True:
    (msg, from_node, to, iface) = r.receive()
    print "received a message from %s" % from_node

Caveats

ICMPv6 filtering does not seem to work if the packet is actually smaller than the ICMPv6 header size. Such kind of message will then be received and must be handled by any application that uses this library.

Authors

• Tony Cheneau ([email protected] or [email protected])

Acknowledgment

This work was supported by the Secure Smart Grid project at the Advanced Networking Technologies Division, NIST.

Conditions Of Use

This software was developed by employees of the National Institute of Standards and Technology (NIST), and others. This software has been contributed to the public domain. Pursuant to title 15 Untied States Code Section 105, works of NIST employees are not subject to copyright protection in the United States and are considered to be in the public domain. As a result, a formal license is not needed to use this software.

This software is provided "AS IS." NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT AND DATA ACCURACY. NIST does not warrant or make any representations regarding the use of the software or the results thereof, including but not limited to the correctness, accuracy, reliability or usefulness of this software.