Page History: Logon
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Page Revision: 2012/09/04 14:36
Session InitiationUpon an established TCP connection, the T4 FIX API basic requirement is to have the initiator and acceptor start sequence numbers from 1.
Drop of a physical (TCP socket) connection will result in the end of a FIX session. Upon reconnection, a new FIX session will be started with a sequence number of 1. Likewise, the T4 API server will respond with messages starting with a sequence number of 1.
Authentication RequirementsFollowing a sucessful physical connection to the FIX API server, authenticated access to the T4 FIX API is achieved with the following parameters of the Logon message:
| Tag Name | Tag Number | Description |
1. | TargetCompId | 56 | FIX API System |
2. | SenderCompId | 49 | Your Firm Name |
3. | SecureData | 91 | Application ID |
4. | SecureDataLen | 90 | Length of Application ID string |
5. | RawData | 96 | Firm Password |
6. | RawDataLen | 95 | Length of Firm Password string |
Failure to provide the correct parameters in the logon message will result in an logon failure. Appropriately, a Logout message will be sent to the client. The Logout message will contain a short description of the failure to help the firm determine the cause of failed authentication. Thereafter, a physical disconnection will occur. As the FIX Session failed, the T4 FIX API will expect a new attempt for a new FIX session. Therefore, the next logon message (from the client) must start with sequence number 1.
Message DictionaryTag | Field Name | Req'd | Comments |
---|
| Standard Header | Y | MsgType = A |
91 | SecureData | Y | FIX API ID. Please contact your FIX API Administrator for your authorized id. |
98 | EncryptMethod | Y | (Always unencrypted). Value = None |
108 | HeartBtInt | Y | Heartbeat interval. Set to 30 seconds. |
95 | RawDataLength | Y | Length of user Password string |
96 | RawData | Y | Password for user authentication |
141 | ResetSeqNumFlag | N | Not used. Indicates both sides of a FIX session should reset sequence numbers |
383 | MaxMessageSize | N | Not used. Can be used to specify the maximum number of bytes supported for messages received |
| Standard Trailer | Y |
Sample Message
34=1|49=test|56=T4Test|50=TraderName|52=20120904-17:37:16.848|91=64768859-3DCF-4214-A4E8-DA66881AFC63|90=36|95=10|96=_password_|98=None|108=30|
[FIXLOGIN]
[MsgSeqNum] 34 = 1
[SenderCompID] 49 = test
[TargetCompID] 56 = T4Test
[SenderSubID] 50 = TraderName
[SendingTime] 52 = 20120904-17:33:50.398
[SecureData] 91 = 64768859-3DCF-4214-A4E8-DA66881AFC63
[SecureDataLen] 90 = 36
[RawDataLength] 95 = 10
[RawData] 96 = _password_
[EncryptMethod] 98 = None
[HeartBtInt] 108 = 30