mptcpd(8)

MPTCPD(8)

System Management Commands

MPTCPD(8)

NAME

mptcpd - multipath TCP daemon

SYNOPSIS

mptcpd [-d?V] [-l DEST] [--debug] [--addr-flags=FLAGS] [--notify-flags=FLAGS] [--plugin-dir=DIR] [--path-manager=PLUGIN] [--load-plugins=PLUGINS] [--help] [--usage] [--log=DEST] [--version]

DESCRIPTION

mptcpd is a daemon for Linux based operating systems that performs multipath TCP (see IETF RFC 8684) path management related operations in the user space. It interacts with the Linux kernel through a generic netlink connection to track per-connection information, available network interfaces, request new MPTCP subflows, handle requests for subflows, etc.

OPTIONS

mptcpd accepts the following command line options:

-d,--debug: enable debug log messages
-?,--help: display mptcpd help information
--usage: display brief mptcpd usage information
-l DEST, --log=DEST: log output to DEST, where DEST can be stderr, syslog or journal
--addr-flags=FLAGS: set flags for announced address, where FLAGS is a comma separated list containing one or more of the flags subflow, signal, backup, fullmesh, and laminar that plugins that deal with the in-kernel path manager may use when advertising addresses, e.g. --addr-flags=subflow
--notify-flags=FLAGS: address notification flags, where FLAGS is a comma separated list containing one or more of the following flags:

existing: notify plugins of the addresses that exist at mptcpd start

skip_link_local: ignore (do not notify) [ipv6] link local address updates

skip_loopback: ignore (do not notify) host (loopback) address updates

check_route: notify address only if a default route is available from such address and the related device. If the route check fails, it will be re-done after a little timeout, to allow e.g. DHCP to configure the host properly. Complex policy routing configuration may confuse or circumvent this check.

These flags determine whether mptpcd plugins will be notified when related addresses are updated, e.g. --notify-flags=existing,skip_link_local,skip_loopback,check_route

--plugin-dir=DIR: set plugin directory to DIR, which should not be world writable for security reasons.
--path-manager=PLUGIN: set default path manager plugin to PLUGIN, overriding plugin priorities
--load-plugins=PLUGINS: set plugins to load on startup, where PLUGINS is a comma separated list containing one or more plugin names
-V,--version: display mptcpd version information

FILES

/etc/mptcpd/mptcpd.conf: Location of the mptcpd system configuration file.

REPORTING BUGS

Report bugs to mptcp@lists.linux.dev.