Logout Response Message Fields
A Logout Response message is usually sent in response to a Logout Request message. Any queued data is transmitted, a Logout Response message is sent, and Cboe will close the connection. However, a Logout Response message may also be sent if the member violates the protocol specification (e.g., by moving backwards in sequence number).
A Logout Response message is also sent for any ports that are connected when the Cboe Options Exchanges shut down. The shut down time for Cboe Options Exchanges is variable each day but is scheduled to occur at 17:30 ET. The message is sent without first receiving a logout request from the Member. The message contains LogoutReason = E (End of Day).
| Field Name | Offset | Length | Data Type | Description |
|---|---|---|---|---|
| StartOfMessage | 0 | 2 | Binary | B0 E3 (58288) |
| MessageLength | 2 | 2 | Binary | 47 00 (71 ) |
| MessageType | 4 | 2 | Binary | F7 01 (503) |
| MatchingUnit | 6 | 1 | Binary | Will be zero |
| Reserved | 7 | 1 | Binary | Unspecified |
| SequenceNumber | 8 | 4 | Binary | Will be zero |
| LogoutReason | 12 | 1 | Text |
|
| LogoutReasonText | 13 | 60 | Text | Human-readable text with additional information about the reason for logout. |