SPINEL_PROP_STREAM_RAW value

Raw Stream Format: `dD` (stream, read only) Required Capability: SPINEL_CAP_MAC_RAW or SPINEL_CAP_CONFIG_RADIO This stream provides the capability of sending and receiving raw 15.4 frames to and from the radio. The exact format of the frame metadata and data is dependent on the MAC and PHY being used. This property is a streaming property, meaning that you cannot explicitly fetch the value of this property. To receive traffic, you wait for `CMD_PROP_VALUE_IS` commands with this property id from the NCP. The general format of this property is: `d` : frame data `D` : frame meta data The frame meta data is optional. Frame metadata MAY be empty or partially specified. Partially specified metadata MUST be accepted. Default values are used for all unspecified fields. The frame metadata field consists of the following fields: `c` : Received Signal Strength (RSSI) in dBm - default is -128 `c` : Noise floor in dBm - default is -128 `S` : Flags (see below). `d` : PHY-specific data/struct `d` : Vendor-specific data/struct Flags fields are defined by the following enumeration bitfields: SPINEL_MD_FLAG_TX = 0x0001 : Packet was transmitted, not received. SPINEL_MD_FLAG_BAD_FCS = 0x0004 : Packet was received with bad FCS SPINEL_MD_FLAG_DUPE = 0x0008 : Packet seems to be a duplicate SPINEL_MD_FLAG_RESERVED = 0xFFF2 : Flags reserved for future use. The format of PHY-specific data for a Thread device contains the following optional fields: `C` : 802.15.4 channel `C` : IEEE 802.15.4 LQI `X` : The timestamp in microseconds Frames written to this stream with `CMD_PROP_VALUE_SET` will be sent out over the radio. This allows the caller to use the radio directly. The frame meta data for the `CMD_PROP_VALUE_SET` contains the following fields. Default values are used for all unspecified fields. `C` : Channel (for frame tx) - MUST be included. `C` : Maximum number of backoffs attempts before declaring CCA failure (use Thread stack default if not specified) `C` : Maximum number of retries allowed after a transmission failure (use Thread stack default if not specified) `b` : Set to true to enable CSMA-CA for this packet, false otherwise. (default true). `b` : Set to true to indicate if header is updated - related to `mIsHeaderUpdated` in `otRadioFrame` (default false). `b` : Set to true to indicate it is a retransmission - related to `mIsARetx` in `otRadioFrame` (default false). `b` : Set to true to indicate security was processed on tx frame `mIsSecurityProcessed` in `otRadioFrame` (default false). `L` : TX delay interval used for CSL - related to `mTxDelay` in `otRadioFrame` (default zero). `L` : TX delay based time used for CSL - related to `mTxDelayBaseTime` in `otRadioFrame` (default zero). `C` : RX channel after TX done (default assumed to be same as channel in metadata)