Copyright © 2010 IRL at Texas A&M University (http://irl.cse.tamu.edu)

This file and all files mentioned below are part of IRL Snacktime. 

    IRL Snacktime is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    IRL Snacktime is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details
    http://www.gnu.org/licenses/lgpl.txt.

Contact:
	Dmitri Loguinov (dmitri@cse.tamu.edu)

Data and signatures:
	http://irl.cse.tamu.edu/projects/sampling

Publication:
	D. Leonard and D. Loguinov, "Demystifying Service Discovery: 
	Implementing an Internet-Wide Scanner," ACM IMC, November 2010.

Files:

signatures.txt:  Contains snacktime signatures in plain text format 
with first field a reference into sig_map.txt.  It has the following format:
	u_char id
	u_short tcp_window
	u_char ip_ttl
	u_char num_delays
	num_delays number of RTO (double)
	...

sig_map.txt:  Maps plain text description of device to signature data 
in signatures.txt

input_signatures.dat:  File created from signatures.txt for easier 
use in fingerprint generation

input_ip_data.dat:  Contains measurements for ~40M IPs that responded 
on port 80.  It has the following format:
	u_short tcp_window
	u_char ip_ttl
	u_int num_delays
	num_delays number of RTO (double)
	...

snacktime.cpp:  Contains two programs as follows
	1)  Takes signatures.txt and converts it to input_signatures.dat
	2)  Takes input_signatures.dat, input_ip_data.dat, and sig_map.txt 
	and produces a distribution of snacktime fingerprints in signature_distribution.txt