Function packet format

Frame format encoding of the sd_ble_gap_sec_info_reply packet.

Operation Code = 0x71 (113) for sd_ble_gap_sec_info_reply, see BLE_GAP_SVCS.

The parameters provided as input to sd_ble_gap_sec_info_reply are encoded in the following order:

- 1 byte:		Operation Code, Value = 0x71 (113)
- 2 bytes:		Connection Handle
- 1 byte:		Encryption Information Present
		0x00 Field not present
		0x01 Field present and follows immediately in the packet
- 19 bytes:		Conditional: Encryption Information
- 1 byte:		Signing Information Present
		0x00 Field not present
		0x01 Field present and follows immediately in the packet
- 16 bytes:		Conditional: Signing Information

Figure 1: Packet format for sd_ble_gap_sec_info_reply function.

The bit fields of Encryption Information are encoded as below and depicted in Figure 2 and Figure 3:

Figure 2: Contents of Encryption information.

- bit 0:	ble_gap_enc_info_t::auth	Authenticated Key
- bit 1 to 7:	ble_gap_enc_info_t::ltk_len	LTK length in octets

Figure 3: Bit Ordering of LTK and Authenticated Key fields.

Response packet format

Frame format encoding of the sd_ble_gap_sec_info_reply response packet.

In case of an error, the following data is encoded:

- 1 byte:		Operation Code, Value = 0x71 (113)
- 4 byte:		nRF Error Code

Figure 4: Packet format for sd_ble_gap_sec_info_reply error response.

In case of a successful command, i.e. 'nRF Error Code' = NRF_SUCCESS, the following data is encoded:

- 1 byte:		Operation Code, Value = 0x71 (113)
- 4 bytes:		nRF Error Code

Figure 5: Packet format for sd_ble_gap_sec_info_reply success response.