openthread_sys

Function otCoapMessageAppendOption

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

Appends a CoAP option in a header.

@param[in,out] 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.