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NFC: Define secure element IO API and commands

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In order to send and receive ISO7816 APDUs to and from NFC embedded
secure elements, we define a specific netlink command.
On a typical SE use case, host applications will send very few APDUs
(Less than 10) per transaction. This is why we decided to go for a
simple netlink API. Defining another NFC socket protocol for such low
traffic would have been overengineered.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2013-08-28 00:39:48 +02:00
parent b9c0c678f7
commit 72b70b6ec4
2 changed files with 9 additions and 0 deletions
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5
include/net/nfc/nfc.h
View file

@ -53,6 +53,8 @@ struct nfc_dev;
typedef void (*data_exchange_cb_t)(void *context, struct sk_buff *skb,
int err);
typedef void (*se_io_cb_t)(void *context, u8 *apdu, size_t apdu_len, int err);
struct nfc_target;
struct nfc_ops {
@ -79,6 +81,9 @@ struct nfc_ops {
int (*discover_se)(struct nfc_dev *dev);
int (*enable_se)(struct nfc_dev *dev, u32 se_idx);
int (*disable_se)(struct nfc_dev *dev, u32 se_idx);
int (*se_io) (struct nfc_dev *dev, u32 se_idx,
u8 *apdu, size_t apdu_length,
se_io_cb_t cb, void *cb_context);
};
#define NFC_TARGET_IDX_ANY -1

4
include/uapi/linux/nfc.h
View file

@ -85,6 +85,7 @@
* a specific SE notifies us about the end of a transaction. The parameter
* for this event is the application ID (AID).
* @NFC_CMD_GET_SE: Dump all discovered secure elements from an NFC controller.
* @NFC_CMD_SE_IO: Send/Receive APDUs to/from the selected secure element.
*/
enum nfc_commands {
NFC_CMD_UNSPEC,
@ -114,6 +115,7 @@ enum nfc_commands {
NFC_EVENT_SE_CONNECTIVITY,
NFC_EVENT_SE_TRANSACTION,
NFC_CMD_GET_SE,
NFC_CMD_SE_IO,
/* private: internal use only */
__NFC_CMD_AFTER_LAST
};
@ -147,6 +149,7 @@ enum nfc_commands {
* @NFC_ATTR_SE_INDEX: Secure element index
* @NFC_ATTR_SE_TYPE: Secure element type (UICC or EMBEDDED)
* @NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS: Firmware download operation status
* @NFC_ATTR_APDU: Secure element APDU
*/
enum nfc_attrs {
NFC_ATTR_UNSPEC,
@ -174,6 +177,7 @@ enum nfc_attrs {
NFC_ATTR_SE_TYPE,
NFC_ATTR_SE_AID,
NFC_ATTR_FIRMWARE_DOWNLOAD_STATUS,
NFC_ATTR_SE_APDU,
/* private: internal use only */
__NFC_ATTR_AFTER_LAST
};