mptcpd 0.1a

This is the initial (alpha) release of the Multipath TCP Daemon "mptcpd". It implements MPTCP path management in the user space by providing a framework that bridges user defined path management strategies - i.e. mptcpd plugins - with the Linux kernel side MPTCP implementation over a generic netlink interface.

The generic netlink interface employed by the Multipath TCP Daemon is based on an early proposal, and will be superseded by the interface available in the MPTCP development kernel, i.e.:
multipath-tcp/mptcp@4ea5dee

In addition to the kernel/user space path management bridging, the Multipath TCP Daemon also monitors changes to local network interfaces and addresses that path management strategies may choose to leverage. Currently, network interfaces and addresses may be queried (pulled). A network event notification mechanism for plugins is currently a work-in-progress.

A single-subflow-per-interface - "sspi" - plugin is included in the source distribution as a reference. It enforces a single subflow per network interface per MPTCP connection policy. Available local addresses are also sent to the kernel so that they may be advertised to the peer through a MPTCP ADD_ADDR option. The current implementation depends on the remote peer to initiate subflows, which may then be allowed or closed per this plugin's policy. Explicitly adding new subflows through this plugin is currently unsupported, but is expected to be implemented in the future.