Hi All, My name is Anand and i would like to thank you every one helped me. I will explore all your response and get back to you. I am very new in python and your help is really much appreciated.
Thanks every one. Regards -- Anand b_dutta wrote: > > Hi 'Learning Python': > It'd be much better you appeared to have a usual name :-) ... people like > responding to human beings with names. > > You would need 2 things:-- > > 1) way to sniff packets off the network. one (common) way to do it is to > use > LibPCAP (Wireshark, Ethereal, Tcpdump... all of those FOSS sniffers use > it). > LibPCAP has what looks like a fairly robust Pythonic API exists). > http://www.darknet.org.uk/2007/12/pcapy-python-interface-to-libpcap/ > http://pylibpcap.sourceforge.net/ > > 2) ASN.1 codec. Here you have 2 choices (and I guess hard ones) -- > a) Use Python ASN.1 codec APIs > b) Use C/C++ (native) ASN.1 codec's with Python wrapper. > > I don't know of very robust open-source ASN.1 codecs (either implemented > in > C/C++ or Python) that are actively developed, so any problem you face, you > are completely on your own. They generally work, but with a limited scope > of > ASN.1 specs. There are ones which work fine for PER, there are others > which > work fine for BER, and few which work only for DER/CER. One Python option > is:- > http://pyasn1.sourceforge.net/ > > HTH > > On Mon, Mar 9, 2009 at 3:50 PM, Radhakrishna Rao <rad...@gmail.com> wrote: > >> i dont know about ASN.1 but there is a very good network tool >> available in python called scapy. you can check it out at >> http://www.secdev.org/projects/scapy/ >> >> On Mon, Mar 9, 2009 at 2:08 PM, learningpython <learningpyt...@aol.com> >> wrote: >> > >> > Hello >> > I am very new to Python and looking forward to implement in Python the >> ASN.1 >> > protocol sniffer. >> > I need two helps here. >> > 1. Functions to extract the bytes and bits from received from network >> in >> a >> > serial input and performing decoding based on the input. >> > 2. How to define the structure, like ASN.1 where further messages are >> based >> > on the No which is processed dynamically ex length of messages definer >> > further Calling IDs, etc. >> > >> > Can someone help me.. >> > >> > learning python >> > > > -- > regards, > Banibrata > http://www.linkedin.com/in/bdutta > > _______________________________________________ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > > -- View this message in context: http://www.nabble.com/Implementing-Protocol-Sniffer-in-Python.-tp22409023p22472758.html Sent from the BangPypers - Bangalore Python Users Group mailing list archive at Nabble.com. _______________________________________________ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
