Detect Mobile and Perform Site redirection (modding detectmobilebrowsers scripts)

Background:
I was working on some freelance project on setting up mobile sites for local businesses and stumbled upon the problem of how best to redirect "clients" to the respective mobile site. After some careful consideration and research on Google this is what i came out with.

Goal:

1. Accurate detection of mobile devices with little future maintenance 
2. Warn clients of redirection and giving them the option to reject our goodwill
3. If client choose to view the full site, allow them to do so

====================================================================
 Sample modded JS can be found here. 

Summarized Solution:

1. Download modded JS.
2. Add js to your site.
   ..script src="js/detectmobilebrowser.js"..
   ..$(document).ready(function(){
           runDetect();
       });..
3. Add runSet() function at link to full site
   ...a href="http://thewanderingtech.blogspot.com" title="thewanderingtech.blogspot.com" target="_self" onClick="runSet()".........................
4. Done. Test. Enjoy

====================================================================

Long winded Solution + Thinking process:
Accurate detection of mobile devices with little future maintenance 
http://detectmobilebrowsers.com/ offers free script to detect mobile devices.
I chose to use the Javascript version of detectmobile as i want minimal disruption to how search engine crawl the Main Site. Think SEO.

Sample:

(function(a,b){if()window.location=b})..........................................(navigator.userAgent||navigator.vendor||window.opera,'http://www.google.com/');

The script works great, but i am not able to fulfill Goal 2 & 3. With such a compact script it could be daunting to Web developers who are not comfortable with coding. 


Warn clients of redirection and giving them the option to reject our goodwill
Simple solution using Confirm
Open detectmobilebrowser.js with a text editor of your choice.
Find
window.location=b
and Replace this string with
if(confirm('For best viewing experience we recommend redirecting to our mobile site')){window.location=b}
Save the js file and you are done. Feel free to change the message you want to display.

If client choose to view the full site, allow them to do so
Nothing is more frustrating than being forced to view a mobile site when all i want to do is view its full site on a mobile device. 
Simple solution using Cookie to track user's intention.

Create a cookie called view to track user's intention.
If from a mobile site, a user clicks on the link view full site, we know that this mobile user wants to visit the full page and does not want to be redirected to the mobile site.
We set the cookie to last 1 day.
Therefore the user would only get redirected to the mobile site the following day or if he/she clears the browser cookies.

From http://www.w3schools.com/js/js_cookies.asp i added these function to detectmobilebrowser.js.

function setCookie(c_name,value,exdays){ .. }

function getCookie(c_name) { ... }

runSet() function informs us that user wants to view our full site.

@JS

function runSet()
{
      var view = getCookie("view");
      setCookie("view","full",1);
}

@ html View Full Sit
a href="http://thewanderingtech.blogspot.com" title="thewanderingtech.blogspot.com" target="_self" onClick="runSet()">View Full Site

runDetect() function will trigger the mobile detection and redirection script as long as cookie "view" is not set to a value "full"

function runDetect(){
var view = getCookie("view");
if(view != "full"){
(function(a,b){if()w ...........  .........     ..........www.google.com/');
}

 Sample modded JS can be found here. 


sss

How NMAP Service Version Detection works

What is nmap: Nmap (Network Mapper) is a security scanner originally written by Gordon Lyon. (wiki)

Apart from the basic host discovery and port scanning, Nmap offers service version detection by using the -sV option during scan.

SERVICE/VERSION DETECTION on Nmap 6.01:
  -sV: Probe open ports to determine service/version info
  --version-intensity : Set from 0 (light) to 9 (try all probes)
  --version-light: Limit to most likely probes (intensity 2)
  --version-all: Try every single probe (intensity 9)
  --version-trace: Show detailed version scan activity (for debugging)

HOW service/version detection in nmap works ???
In short Nmap probes a port and attempts to grab any available banner, then it matches the received banner with its database of banners. The database is stored in nmap directory within a file called nmap-service-probes.

Nmap uses regular expression to match the banner found. An example of how a detection of OpenSSH service works:

rule found in nmap-service-probes: 
match ssh m|^SSH-([\d.]+)-OpenSSH\r?\n$| p/OpenSSH/ i/protocol $1/ d/terminal server/
Green: tells nmap what service is matched
Blue: Determine if the banner received is in the following pattern
Red: Reply from nmap to us, informing us the version found

Linux Console:
Have netcat open a random port and send out a SSH string:
echo -ne "SSH-2.0-OpenSSH_2.5\r\n" | nc -l 222

Have nmap try a service detection on the port you have just opened: (I have chosen port 222)
nmap -sV -PN -p 222 127.0.0.1

[root@localhost user]# nmap -sV -PN -p 222 127.0.0.1

RESULT:
[root@localhost user]# nmap -sV -PN -p 222 127.0.0.1
Starting Nmap 5.51 ( http://nmap.org ) at 2012-07-13 19:51 PDT
PORT    STATE SERVICE VERSION
222/tcp open  ssh     OpenSSH 2.5 (protocol 2.0)

Additional Info:

For more info on regular expression or just testing it live:

http://www.regextester.com/

http://www.regular-expressions.info/reference.html/

Nmap:

http://nmap.org/download.html