twitchyliquid64 Posted January 15, 2011 Share Posted January 15, 2011 Hi all, I have a TCP packet of variable length coming in. I need a way to get the first four bytes of the message, and bytes 8-12 and whatnot. separataly, so they can be interpreted separately. http://capnbry.net/gnutella/protocol.php And after that, I need a way to recreate the packets. I heard that I can use bitAND and bit shifting, but how would I actually do this? Thanks in advance. Hypoz ongoing projects:-firestorm: Largescale P2P Social NetworkCompleted Autoit Programs/Scripts: Variable Pickler | Networked Streaming Audio (in pure autoIT) | firenet p2p web messenger | Proxy Checker | Dynamic Execute() Code Generator | P2P UDF | Graph Theory Proof of Concept - Breadth First search Link to comment Share on other sites More sharing options...
PsaltyDS Posted January 15, 2011 Share Posted January 15, 2011 What form do you have the TCP packet in? Post a short demo script that gets the packets in the first place, then you can get help in manipulating it. Valuater's AutoIt 1-2-3, Class... Is now in Session!For those who want somebody to write the script for them: RentACoder"Any technology distinguishable from magic is insufficiently advanced." -- Geek's corollary to Clarke's law Link to comment Share on other sites More sharing options...
twitchyliquid64 Posted January 15, 2011 Author Share Posted January 15, 2011 What form do you have the TCP packet in? Post a short demo script that gets the packets in the first place, then you can get help in manipulating it. I don't think I have been consise enough. The data contained in the TCP packet could just be obtained with$data = TCPRecv( $sock, 1024)as usual.I would hold the data in a variable as above, and the data needs to be split into bytes from there. ongoing projects:-firestorm: Largescale P2P Social NetworkCompleted Autoit Programs/Scripts: Variable Pickler | Networked Streaming Audio (in pure autoIT) | firenet p2p web messenger | Proxy Checker | Dynamic Execute() Code Generator | P2P UDF | Graph Theory Proof of Concept - Breadth First search Link to comment Share on other sites More sharing options...
PsaltyDS Posted January 15, 2011 Share Posted January 15, 2011 Then it's just BinaryMid(): $data = Binary("0xFEDCBA9876543210") ; Simulated TCP binary data $binFirst = BinaryMid($data, 1, 4) $binLast = BinaryMid($data, BinaryLen($data) - 3, 4) MsgBox(64, "Results", "First four bytes = " & $binFirst & @CRLF & _ "Last four bytes = " & $binLast) Valuater's AutoIt 1-2-3, Class... Is now in Session!For those who want somebody to write the script for them: RentACoder"Any technology distinguishable from magic is insufficiently advanced." -- Geek's corollary to Clarke's law Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now