% Login Sequence

Reviewed 2021-03-03 by japhb

NOTE: NYI AND LARGELY ASSUMES SPLIT SERVER TYPES IS IMPLEMENTED

Notes

• RTT in a single strand of glass fiber to the other side of the earth would be ~200ms.

• (TLS SETUP = DNS + 2 RTT) is the setup time for a new TCP-based TLS 1.3 connection.

Login Steps

1. (TLS SETUP) Connect to Login Server

2. (1 RTT) Send username, credentials, and supported protocol versions

   • If protocol version not supported, indicate error and shut down connection

   • Unless username/credentials validated, return auth failure and repeat

   • Otherwise return auth success and optionally a redirect location with an opaque single-use expiring login ticket

3. (TLS SETUP) If redirected, drop Login Server connection and connect to redirect location using ticket

4. (1 RTT) Request server/user welcome info bundle

   • Return all of:

     • General info about server

     • Upgrade hint if server supports newer protocols

     • Welcome message, house rules, etc., if any

     • Authorized personas and their characters, marking user's defaults

     • Permitted (and supported) game types for that user

     • Server-wide game stats: count active, count full, count filling, etc.

     • Games that user's authorized personas/characters are currently in

   • Note: These should all be available to request individually as well

5. User choice: Select existing identities, Create new identities, Stay incognito

6. (1 RTT) Request desired identities

   • If not permitted, return failure; client should request authorized personas and characters again (1 RTT) and return to step 5

7. User choice: Create a game, Join a game, ...