Wait until a specific client is blocked

* @brief Wait until all elements of the expected sequence appear in order within the record. * The elements do not need to be contiguous — other

Blocks the current thread until a SIGINT or SIGTERM is received.

Wait until N SUBSCRIBE messages have been received (without blocking them)

Polls /proc/net/tcp until no ESTABLISHED or CLOSE_WAIT connections remain on `BOARDNET_IP_HEX`, or until `timeout` elapses. Returns true when the coun

Polls /proc/net/udp until no sockets remain bound to `BOARDNET_IP_HEX`, or until `timeout` elapses. Returns true when the count reaches 0.

Returns a copy of an existing ecu_config with additional boardnet interfaces appended.