NFC: Initial LLCP support

This patch is an initial implementation for the NFC Logical Link Control
protocol. It's also known as NFC peer to peer mode.
This is a basic implementation as it lacks SDP (services Discovery
Protocol), frames aggregation support, and frame rejecion parsing.
Follow up patches will implement those missing features.
This code has been tested against a Nexus S phone implementing LLCP 1.0.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 14 insertions, 1 deletions

diff --git a/include/linux/nfc.h b/include/linux/nfc.h
index 34d8303111f0..89fee4ab1904 100644
--- a/include/linux/nfc.h
+++ b/include/linux/nfc.h
@@ -139,9 +139,22 @@ struct sockaddr_nfc {
         __u32 nfc_protocol;
 };
 
+#define NFC_LLCP_MAX_SERVICE_NAME 63
+struct sockaddr_nfc_llcp {
+        sa_family_t sa_family;
+        __u32 dev_idx;
+        __u32 target_idx;
+        __u32 nfc_protocol;
+        __u8 dsap; /* Destination SAP, if known */
+        __u8 ssap; /* Source SAP to be bound to */
+        char service_name[NFC_LLCP_MAX_SERVICE_NAME]; /* Service name URI */;
+        size_t service_name_len;
+};
+
 /* NFC socket protocols */
 #define NFC_SOCKPROTO_RAW       0
-#define NFC_SOCKPROTO_MAX       1
+#define NFC_SOCKPROTO_LLCP      1
+#define NFC_SOCKPROTO_MAX       2
 
 #define NFC_HEADER_SIZE 1