Function otIp6SetEnabled 

pub unsafe extern "C" fn otIp6SetEnabled(
    aInstance: *mut otInstance,
    aEnabled: bool,
) -> otError

Brings the IPv6 interface up or down.

Call this to enable or disable IPv6 communication.

When OPENTHREAD_CONFIG_IP6_INIT_EXT_ADDR_POOL_ENABLE is enabled, otIp6Init() MUST be called prior to calling this function. If it is not, this function will return OT_ERROR_INVALID_STATE.

@param[in] aInstance A pointer to an OpenThread instance. @param[in] aEnabled TRUE to enable IPv6, FALSE otherwise.

@retval OT_ERROR_NONE Successfully brought the IPv6 interface up/down. @retval OT_ERROR_INVALID_STATE IPv6 interface is not available since device is operating in raw-link mode (applicable only when OPENTHREAD_CONFIG_LINK_RAW_ENABLE feature is enabled), or not initialized under OPENTHREAD_CONFIG_IP6_INIT_EXT_ADDR_POOL_ENABLE.