Gap Request Message Fields
The Gap Request message is used by a user's process to request retransmission of a sequenced message (or messages) by one of Cboe's gap servers.
The Gap Request message for Cboe Summary Depth is identical to the Multicast PITCH Gap Request message. The Unit field should be set to 0 since the Cboe Summary Depth feed is not unitized.
| Field | Offset | Length | Value/Type | Description |
|---|---|---|---|---|
| Length | 0 | 1 | Binary | Length of this message including this field. |
| Message Type | 1 | 1 | 0x03 | Gap Request message |
| Unit | 2 | 1 | Binary | Unit that the gap is requested for (0 for Cboe Summary Depth implementation). |
| Sequence | 3 | 4 | Binary | Sequence of first message (lowest sequence in range). |
| Count | 7 | 2 | Binary | Count of messages requested |
| Total Length = 9 bytes | ||||