Protocol

In order to spot potential trouble spots, we want to have a pretty clear understanding of the UDP, TCP, and by-product communication between the client and the servers.

The UDP Message System

• Packet Layout -- the layout of the UDP payload.
• Packet Accounting -- how the message system handles packet sequencing, reliability, suppression, throttling, etc.
• Common Messages -- messages that are handled by every indra message system instance.
• Xfer Manager -- messages used by the LLXFerManager class.
• Transfer Manager -- messages used by the LLTransferManger class.

Communication with userserver

• Userserver Agent -- agent update information which alters userserver state.
• Userserver Relay -- messages relayed between the back-end systems and the viewer.

Communication with simulator

• Agent Messages -- agent movement, animation, appearance, etc.
• Inventory Messages -- agent inventory and asset management.
• Money Messages -- money queries and updates.
• Object Messages -- object and prim interaction.
• Parcel Messages -- parcel and land management and interaction.
• Region Messages -- interaction with the region, nearby regions, and movement between them.
• Communication Messages -- chat, instant messages, and lsl script interaction.
• Group Messages -- joining, management, and group related messages.
• Relationship Messages -- friends, granted rights, calling cards, and mute.
• Search Messages -- access to global search services.

XMLRPC Transactions

• Authentication Flow -- step-by-step diagram of login process
• Buying Land and Currency -- viewer side purchasing of land and currency.