CMSG AUTH SESSION
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CMSG_AUTH_SESSION is a World Packet that initiates the connection between the client and the world server.
It is one of only two world packets with unencrypted headers, the other being SMSG_AUTH_CHALLENGE.
| 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. |