224.5.6.7 for IPv4 and FF02::5:6:7 for IPv6 as multicast address.
We currently use IPv4 but is easily changed to IPv6
Everything below 2000 is marked as reserved. We will be using 4567 for device discovery (UDP) and 4568 for syncing hashes (TCP)
the File Transfer Protocol (https://tools.ietf.org/html/rfc959) will be used for transfering the files between users.
The total size of this segment is 18 bytes.
| Request ID | Device ID | Device name |
|---|---|---|
| 1 byte | 1 byte | 16 byte |
The packets are defined with a request ID, written in hexadecimal notation prefixed by '0x' for convenience.
| Request ID | name | Description |
|---|---|---|
| 0x01 | Device Discovery | Ask devices on the same multicast socket to send their device information (see table above). |
| 0x11 | Device Discovery Reply | Reply to the discovery by sending an UDP using Unicast (ip to ip). |
| 0x02 | Request songlist | Request md5 hashes. Using Unicast. |
| 0x12 | Reply songlist | Response to request songlist. Sends a byte array with the md5 hashes of the songs to compare in unicast. |
| 0xFF | Sync confirm | Send a confirmation that the songs have been successfully synchronized in unicast. |