Logon Message Fields (Client)
| Field Name | Offset | Length | Type/(Value) | Description |
|---|---|---|---|---|
| Message Type | 0 | 1 | L | Logon message |
| Username | 1 | 6 | Alphanumeric | Username, assigned by Cboe |
| Password | 7 | 10 | Alphanumeric | Password, assigned by Cboe |
| Spin Flag | 17 | 1 | Boolean | If Y, spin current top of book |
| \n | 18 | 1 | \n | End of message |