Protocol:Packet Header: Difference between revisions
Note about JPv1 and its strange buggy packets. |
m BlueCrab moved page Packet Header to Protocol:Packet Header |
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Different versions of PSO use slightly different formats for the headers on all packets sent to and from the server. PSO versions up to, and including, PSOGC use a 4-byte header, while PSO Blue Burst uses an 8-byte header. All packets should generally be some multiple of their header in size (since that's how the encryption is dealt with). | Different versions of PSO use slightly different formats for the headers on all packets sent to and from the server. PSO versions up to, and including, PSOGC use a 4-byte header, while PSO Blue Burst uses an 8-byte header. All packets should generally be some multiple of their header in size (since that's how the encryption is dealt with). | ||
Note that some versions (namely, Japanese Dreamcast v1) of the game do silly things and send packets that aren't multiples of the header size on some occasions. | Note that some versions (namely, Japanese Dreamcast v1 and the Dreamcast Network Trial Edition) of the game do silly things and send packets that aren't multiples of the header size on some occasions. The server is essentially expected to pad the packets in that case. | ||
==Dreamcast/Gamecube Header Format== | ==Dreamcast/Gamecube Header Format== | ||
Latest revision as of 05:09, 13 December 2021
Different versions of PSO use slightly different formats for the headers on all packets sent to and from the server. PSO versions up to, and including, PSOGC use a 4-byte header, while PSO Blue Burst uses an 8-byte header. All packets should generally be some multiple of their header in size (since that's how the encryption is dealt with).
Note that some versions (namely, Japanese Dreamcast v1 and the Dreamcast Network Trial Edition) of the game do silly things and send packets that aren't multiples of the header size on some occasions. The server is essentially expected to pad the packets in that case.
Dreamcast/Gamecube Header Format
| Bytes | Meaning |
|---|---|
| 0x00 | Packet Type |
| 0x01 | Flags |
| 0x02-0x03 | Packet Size (Little-Endian) |
PC Header Format
| Bytes | Meaning |
|---|---|
| 0x00-0x01 | Packet Size (Little-Endian) |
| 0x02 | Packet Type |
| 0x03 | Flags |
Blue Burst Header Format
| Bytes | Meaning |
|---|---|
| 0x00-0x01 | Packet Size (Little-Endian) |
| 0x02-0x03 | Packet Type (Little-Endian) |
| 0x04-0x07 | Flags (Little-Endian) |