Hall

Hall is a fork of the original Grumble server.

What is Hall?

Hall is an implementation of a server for the Mumble voice chat system. It is an alternative to Murmur, the typical Mumble server.

Compiling Hall from source

You must have a Go 1 environment installed to build Hall. Those are available at:

https://golang.org/dl/

Run the following command to build Chinese localized version:

$ make clean
$ make zh

Or the English version:

$ make clean
$ make en

And that should be it. Hall has been built, and is available in working directory as 'hall'.

Is it stable enough?

The server published here is generally stable. Experiments are done in other locations.

Configuration

See config.go.

Capabilities

Version supported

The protocol version supported by the server is specified in version.go as verProtover.

Extra features Murmur don't have

• More than 1 session per User ID, and fine-grained control over how many sessions a user can have.
• GeoIP based ACL
• Better multi-core utilization and locking mechanism
• Less crash and more robust with slow external authenticator
• Config hot-reload
• Certificate hot-reload
• Automatically determine if a connection is droppy and disable UDP accordingly.
• sendmmsg support that reduces syscall overhead by sending UDP packets in batches.
• Proxy protocol support

Extra features Grumble don't have

• Database support (SQLite only currently, but can be ported easily)
• Authentication via HTTP (rpc.go) and periodically user list sync.
• Optimized performance for thousands of clients on low-end hardware.

Not implemented

• User Textures are not implemented.
• Local user databases is stripped away since I don't use them.
• Only a part of ACL Group directives are implemented. See group.go for details.
• Temporary channels are not implemented. I still haven't found an elegant solution to implement this feature with minimal impact to database.
• Import from Murmur database is not implemented. I don't use this as well but PRs are welcome.
• User list is empty. The server does not store user information (nor in offline cached mode).
• Websocket server is stripped away. Are there actually any user that use it?

TBD

• Docker files
• License craps
• Cleanups