Function openthread_sys::otCoapMessageAppendOption

pub unsafe extern "C" fn otCoapMessageAppendOption(
    aMessage: *mut otMessage, 
    aNumber: u16, 
    aLength: u16, 
    aValue: *const c_void
) -> otError

This function appends a CoAP option in a header.

@param[inout] aMessage A pointer to the CoAP message. @param[in] aNumber The CoAP Option number. @param[in] aLength The CoAP Option length. @param[in] aValue A pointer to the CoAP value.

@retval OT_ERROR_NONE Successfully appended the option. @retval OT_ERROR_INVALID_ARGS The option type is not equal or greater than the last option type. @retval OT_ERROR_NO_BUFS The option length exceeds the buffer size.