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

• Message Layout -- Explanation of message format and the message template
• Packet Layout -- the layout of the UDP payload.
• Circuits -- Establishment and common operation of UDP circuits between two nodes
• 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.
• Avatar Appearance -- messages controlling avatar appearance

XMLRPC Transactions

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

File Formats

Asset Files

• Textures
• Sounds
• Landmarks
• Notecards
• LSL Text
• LSL Bytecode
• Bodypart
• Animations
• Gestures

Media Files

Image format

• jpeg
• JPEG2000
• tga (Truevision targa)
• bmp (Windows bitmap)

Audio

• wav files

Animation

• bvh files for animations

Linden Files

• raw files for uploading sim land information
• LL DXT files

Miscellaneous Files

• Task Inventory
• Mute List