Function libcoap_sys::coap_send_message_type

pub unsafe extern "C" fn coap_send_message_type(
    session: *mut coap_session_t, 
    request: *mut coap_pdu_t, 
    type_: c_uchar
) -> coap_tid_t

Helper funktion to create and send a message with @p type (usually ACK or RST). This function returns @c COAP_INVALID_TID when the message was not sent, a valid transaction id otherwise.

@param session The CoAP session. @param request The request that should be responded to. @param type Which type to set. @return transaction id on success or @c COAP_INVALID_TID otherwise.