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RTT
David Gerber edited this page May 5, 2023
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Service type: 37
Sends a ping each 10 seconds. Responds with a pong when a ping is received. Allows to measure the times it takes to reach a peer, and back.
| Item | Subtype | Purpose |
|---|---|---|
| Ping | 1 | Sent to the peer to receive a reply. |
| Pong | 2 | Sent as a reply to a ping item. |
| Name | Type | Description |
|---|---|---|
| Sequence number | int | Is incremented for each new item sent. |
| Timestamp | long | Contains the current time when the item is sent. This is a 64-bit timestamp which contains the number of seconds from 01-01-1970 on the 32-bit MSB part and the number of nanoseconds on the 32-bit LSB part. |
| Name | Type | Description |
|---|---|---|
| Sequence number | int | The sequence number corresponding to the ping item. |
| Ping timestamp | long | The timestamp from the corresponding ping item. |
| Pong timestamp | long | The current time when the item is sent. |
Sends a RTT item to all peers every 10 seconds. Uses it to compute the lag to display in the statistics user interface and planned to use it for VOIP.
Sends a RTT item to all peers every 10 seconds. Doesn't use it for anything yet.