> If the trading program is in java or perl, can I just tap into the raw > data that trading program is recieving through the modem without > interfering with the trading program's own information stream?
Assuming it turns into IP data at some satage then you can get several programs - some are even free! - that will sniff IP packets and either log them to a file or display them on a screen. This can run in background with only slight impact on performance. So you can use Popen to capture the output and analyze it. Search for 'packet sniffer' on Google. Ethereal is one well known and powerful one, but there are others which may be simpler to use. Here is one web site that lists a few: http://netsecurity.about.com/cs/hackertools/a/aafreepacsniff.htm Alan G Author of the learn to program web tutor http://www.freenetpages.co.uk/hp/alan.gauld _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
