CMSG AUTH SESSION
Jump to navigation
Jump to search
CMSG_AUTH_SESSION is a World Packet that initiates the connection between the client and the world server. It is preceded by SMSG_AUTH_CHALLENGE and succeeded by SMSG_AUTH_RESPONSE.
It is one of only two world packets with unencrypted headers, the other being SMSG_AUTH_CHALLENGE.
| Offset | Size / Endianness | Type | Name | Description |
|---|---|---|---|---|
| 0x0 | 2 / Big | uint16 | size | Size of the packet including the opcode field. |
| 0x2 | 4 / Little | uint32 | opcode | Opcode for the packet. Determines the structure of the body. Always 0x1ED. |
| Offset | Size / Endianness | Type | Name | Description |
|---|---|---|---|---|
| 0x0 | 4 / Little | uint32 | build | Revision of client. |
| 0x4 | 4 / Little | uint32 | server_id | |
| 0x8 | - / Big | char[] | username | Null terminated string. |
| - | 4 / Little | uint32 | client_seed | Client seed for proving knowledge of session key. |
| - | 20 / Little | uint8[20] | client_proof | Client proof of knowing the session key. |
| - | 4 / Little | uint32 | decompressed_addon_info_size | |
| - | 4 / Little | uint8[] | compressed_addon_info | This field lasts until the end of the packet. The size of this can be calculated from the size field in the header. |