Function embedded_nal_minimal_coapserver::poll_with_response_handler

pub fn poll_with_response_handler<ST>(
    stack: &mut ST,
    socket: &mut ST::UdpSocket,
    handler: &mut impl Handler,
    response_handler: impl for<'a> FnOnce(u16, &'a [u8], &'a Message<'a>) -> bool
) -> Result<(), ST::Error>where
    ST: UdpFullStack + ?Sized,

Like poll, but allowing a callback for response messages.

The response_handler will be called on every received CoAP response (including empty ACKs), with message ID, token and the message. It should return true if the response was expected, and false if not; this influences whether a CON will be responded to with an ACK or an RST.

Users should not rely on the message argument to the handler to be precisely the indicated type; it may change to any implementation of coap_message::ReadableMessage.