vNEXT

Fixed compatibility with new Linux kernels on the broker side: New kernels force the l2tpv3 session ID to be unique system-wide, while old tunneldigger clients have a hard-coded ID of 1 for both ends of the tunnel. When a new client talks to a new broker, they will instead use a unique ID. Moreover, when the broker detects that it runs on an affected kernel, it reports maximal usage to old clients -- so if the client does usage-based selection, it will pick another broker.
Added cmake buildsystem to the client.
Added option connection_rate_limit to configure the delay between two clients connecting. Default is 10 (seconds).
Added option pmtu, defaults to 0 (auto-discovery). If set to a non-zero value, this disables PMTU discovery and replying to client's PMTU discovery probes.
Improve client behavior on broker failure, and decrease some reconnect timeouts.

v0.3.0, 2017-Apr-02

Fixed double command bug in traffic control code.
Added optional broker selection based on usage.
Fixed off-by-one error in PREPARE package.
Added tests.
Added fq_codel tc rule to help alleviate buffer bloat.
Added new CFFI-based conntrack bindings.
Broker can now be installed as a Python package via setup.py. Due to this change it is now run as python -m tunneldigger_broker.main l2tp_broker.cfg after installation.

Broker rewrite so that it can run on OpenWrt. The broker now enforces a 10s delay between two clients connecting. Support for several config options got dropped: max_cookies, tunnel_timeout, pmtu_discovery, check_modules, filename. Hooks run asynchronously. In particular, the pre-down hook is not guaranteed to complete before the tunnel is shut down.
Broker is now run as python -m broker.main l2tp_broker.cfg from the repository directory.