[This message was posted by Wayne Harrison of System Engineering Limited <[email protected]> to the "4.0 Session" discussion forum at http://fixprotocol.org/discuss/12. You can reply to it on-line at http://fixprotocol.org/discuss/read/b73e60cd - PLEASE DO NOT REPLY BY MAIL.]
> > what is the major tag to login the FIX? what is the login syntax to > > logon the FIX system? > > > Vivian, > > The Logon Message should always be the FIRST message process on any FIX > Session. The message is defined by the MsgType Field(35=A). Logins > should always be relayed between parties before any application messages > are transmitted. > > I'd suggest taking a look at the FIX Spec - 4.0 Session - for details. > You can also take a look at www.openfix.net > > ;) > > dan saad - "I do the FIX" Dan, Your message touches on something that I've encountered recently and I wondered if you, or anyone else, could clarify something for me. I don't know whether you meant to imply that authentication handshaking (i.e. the exchange of Logon messages) must be completed before application messages can be sent, but the FIX.4.0 spec does not seem to me to be so clear. For instance, in the section "SESSION PROTOCOL" it states "A FIX session is comprised of three parts: logon, message exchange and logout.", which kind of implies that logon must be completed before message exchange can begin. However, shortly after this in the same section, in the subsection "Logon" it states "The session initiator may begin to send messages immediately following the Logon message, however, the session may not be supported by the other side at this time. The initiator must wait for the confirming Logon message from the acceptor before declaring the session fully established." Does this mean that the initiator may send application messages before receiving a Logon message from the acceptor if the parties concerned have a bilateral agreement in place? Obviously, messages received before a session is "fully established" should not be processed, but they could be queued. Wayne. [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 -~----------~----~----~----~------~----~------~--~---
