Decode a Packet

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Dear all

I am making my own application to receive packet from NSE sever and i am success in it. But my problem is all the packets is in byte format. now how can I get LIVE quotes of any company(scrips)to decode these packets. When I store these bytes in text file it looks like :

YZ**123 @

How can I get Live feed from this . If anybody know pls help me?

Thanks and regards
Raghvendra kumar Roy

Posted 6-Dec-10 20:04pm

Raghvendra Kumar Roy

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Goutam Patra 8-Dec-10 2:51am

See my Edited answer.

Goutam Patra 8-Dec-10 6:16am

Post a new question and ask for twiddling. Someone will help you out in that regard or may be i will be ther.

4 solutions

Solution 4

Go through the below links .., this may slove your problem

http://nmap.org/book/nse-library.html[^]

http://nmap.org/nsedoc/lib/dns.html[^]

Posted 7-Dec-10 21:33pm

Rajesh Anuhya

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Dalek Dave 8-Dec-10 3:50am

Good Links.

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Goutam Patra · Accepted Answer · 2010-12-07T02:24:00

NSE has documented the whole structures of all kind of packets. You need to go through that. Without that documentation you will not be able to do anything further. And I mean that. And moreover its not that easy what you are thinking at all.

[EDIT]
OK, See i cant help you al the way.
But see
As per the documentation The first char is the NETID. Now your packet says the first char is 4. Leave the next char. The next 2 bytes denotes the no of packet. Here you should take a note the data types such as UINT, SHORT, LONG and DOUBLE contained in a packet, which occupy more than one byte should be twiddled (byte reversed). So after twiddling the 2 bytes of no of packet you will get 1. That means the packet contain one Packet. And so on.
Note the packet may contain compressed/decompressed data or may be both.
I am sorry I cant help you any further.

Now go through the document and carry on.

Good luck
[ END EDIT]

Dave Kreskowiak · Accepted Answer · 2010-12-07T01:37:00

Solution 1

What do you mean "packet"?? Are you getting raw binary data over TCP/IP from the NSE server? Without the documentation on the format of the data in the packet, you're just guessing at what you have to do, and so would we.

Posted 7-Dec-10 1:37am

Dave Kreskowiak

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Raghvendra Kumar Roy 8-Dec-10 2:15am

Thanks Dave,
Ya packet means raw binary data. when we write it into text file then it prints only some symbols. How can I get a readable formats?

#realJSOP · Accepted Answer · 2010-12-07T01:59:00

Solution 2

I'm willing to bet that if you look around with google, you'll find guyidelines and even examples of how to decode the data you're getting.

BTW, did you mean NYSE?

Posted 7-Dec-10 1:59am

#realJSOP

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Goutam Patra 7-Dec-10 8:33am

[did you mean NYSE?] NSE->National Stock Exchange (India)

Decode a Packet

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