[colug-432] talking to your ISP

[Bill Baker]

I did have to modify the script because my modem has it at
http://192.168.100.1/signal.html with no authentication required.  It is
in an HTML table, but different from yours.  Mine looks like this:

http://i49.tinypic.com/1z1tgnn.png

On 12/29/2012 01:08 PM, Rick Hornsby wrote:
> 
> On Dec 29, 2012, at 08:39 , Bill Baker <bill_chris at earthlink.net> wrote:
> 
>> It must only work for your model modem, because all I got was this:
>>
>> Sat Dec 29 09:37:50 EST 2012 hwver:0.0 rx:0.0 snr:0.0 tx:0.0
> 
> If it helps, breaking it down here's what happens:
> 
> http://ktzr.net/files/twc_cable_modem_stats.png
> 
> The script expects: 
> 	to find your modem at 192.168.100.1
> 	to not find any 401 authentication
> 	to have the statistics be at a page called 'system.asp'
> 	to have the target data be in an HTML table
> 
> The ruby script is pretty simple - it just dumps all content it finds on the page that is in an HTML table cell (a 'td' tag). The "stats=" line takes that result and does some filtering and clean up, turning this
> 
>      Hardware Version
>  2.0
> 
>       Software Version
>  dpc2100rx-v202r1256-110531Uas-TWC
> 
>       Receive Power Level
>  -14.4 dBmV
> 
>       Signal to Noise Ratio
>  32.8 dBmV
> 
>       Transmit Power Level
>  42.8 dBmV
> 
> into this
> 
> 2.0 -14.5 32.8 42.8
> 
> Stepwise, that stats= line:
> 	- filters out some unprintable junk characters (tr)
> 	- filters for only lines that (grep)
> 		- start with a dash or a number
> 		- followed by a dot .
> 		- followed by a number
> 	- replaces the newlines with a single space (tr)
> 
> We print the current date, then the awk command then makes a(nother) leap that the different values are presented in the order above and prints them formatted as floating point numbers.
> 
> The script is by no means smart about how it processes.  It doesn't even bother looking at the data's label in the HTML.
> 
> 
> 
>> On 12/29/2012 07:05 AM, Rick Hornsby wrote:
>>>
>>> If anyone is interested in replicating my work for their own setup, here's what I'm using to record the modem stats (if I knew ruby better, I could probably write the whole thing in ruby; also, there are a crapton of improvements possible. this was a 15 minute hack job):
>>>
>>>
>>> === fetch_stats.rb ===
>>> #!/usr/bin/ruby
>>>
>>> require 'rubygems'
>>> require 'nokogiri'
>>> require 'open-uri'
>>>
>>> doc = Nokogiri::HTML(open('http://192.168.100.1/system.asp'))
>>> doc.xpath("//td").each do |td|
>>> 	puts td.content
>>> end
>>>
>>> === modem_stats.sh ===
>>> #!/bin/bash
>>>
>>> fetch_stats=~/bin/fetch_stats.rb
>>>
>>> stats=$($fetch_stats | tr -d '\302\240' | grep -o "^-*[0-9]\+\.[0-9]\+" | tr '\n' ' ')
>>>
>>> echo -n $(date)
>>> echo $stats | awk '{printf " hwver:%0.1f rx:%0.1f snr:%0.1f tx:%0.1f\n", $1, $2, $3, $4}'
>>>
>>> === cron entry === 
>>> * * * * * ~/bin/modem_stats.sh >> ~/tmp/modem_stats.log
>>>
>>> === result ===
>>> Sat Dec 29 06:02:01 CST 2012 hwver:2.0 rx:-13.8 snr:32.9 tx:42.8
>>> _______________________________________________
>>> colug-432 mailing list
>>> colug-432 at colug.net
>>> http://lists.colug.net/mailman/listinfo/colug-432
>>>
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