[This message was posted by sean grady of OptionsCity <[email protected]> to the "FAST Protocol" discussion forum at http://fixprotocol.org/discuss/46. You can reply to it on-line at http://fixprotocol.org/discuss/read/577bd6bc - PLEASE DO NOT REPLY BY MAIL.]
Dale, I ended up grabbing a copy of that TCPDump and it has been a great help - thanks for letting me know about that. I've got the UDP header identified and what appears to be the ArcaBook header identified, so I'm working on trying to run the actual compacted message data through the decoder they provide. So far, no luck really, it returns '0' which means it was successful but it only processes 3 bytes and only fills in the message type in the destination buffer. But, thats further than I was, so I'll take what I can get. Better get back to it. Thanks again, Sean > Hi Sean, > > > Sean, the weird preamble indicates that you are looking at a pcap > > formatted file (possibly produced by tcpdump -s0 -o ...) > > > > If this is indeed the case, then you have ETH, IP and UDP headers in > > front of the payload. > > It sounds as if may have a better set of sample files than the ones I > worked with. Having a pcap formatted file is actually a good thing. > > There is an open source library, pcaplib (http://www.tcpdump.org/), that > can read these files on *nix systems. There is a windows version as > well, winpcap (http://www.winpcap.org/). > > When I was working with QuickFAST I wanted to avoid adding dependencies > on two external projects, and also I didn't want to fight the > portability problems of using pcaplib on *nix and winpcap on Windows, so > I wrote a simple-minded pcap file reader that reads UDP/Multicast files > only. For general purpose work you should obviously use one of the pcap > libraries, but if all you need to do is read a capture of a multicast > stream, you're welcome to "borrow" the PCapToMulticast program that is > one of the example programs in QuickFAST > (http://quickfast.googlecode.com) > > HTH, > > Dale [You can unsubscribe from this discussion group by sending a message to mailto:[email protected]] --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Financial Information eXchange" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/FIX-Protocol?hl=en -~----------~----~----~----~------~----~------~--~---
