2 files changed, 45 insertions, 0 deletions

diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 7f92a857b319..a2da0a4f367d 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -720,6 +720,39 @@ static u8 *nfc_llcp_connect_sn(struct sk_buff *skb, size_t *sn_len)
         return NULL;
 }
 
+static void nfc_llcp_recv_ui(struct nfc_llcp_local *local,
+                             struct sk_buff *skb)
+{
+        struct nfc_llcp_sock *llcp_sock;
+        struct nfc_llcp_ui_cb *ui_cb;
+        u8 dsap, ssap;
+
+        dsap = nfc_llcp_dsap(skb);
+        ssap = nfc_llcp_ssap(skb);
+
+        ui_cb = nfc_llcp_ui_skb_cb(skb);
+        ui_cb->dsap = dsap;
+        ui_cb->ssap = ssap;
+
+        printk("%s %d %d\n", __func__, dsap, ssap);
+
+        pr_debug("%d %d\n", dsap, ssap);
+
+        /* We're looking for a bound socket, not a client one */
+        llcp_sock = nfc_llcp_sock_get(local, dsap, LLCP_SAP_SDP);
+        if (llcp_sock == NULL || llcp_sock->sk.sk_type != SOCK_DGRAM)
+                return;
+
+        /* There is no sequence with UI frames */
+        skb_pull(skb, LLCP_HEADER_SIZE);
+        if (sock_queue_rcv_skb(&llcp_sock->sk, skb)) {
+                pr_err("receive queue is full\n");
+                skb_queue_head(&llcp_sock->tx_backlog_queue, skb);
+        }
+
+        nfc_llcp_sock_put(llcp_sock);
+}
+
 static void nfc_llcp_recv_connect(struct nfc_llcp_local *local,
                                   struct sk_buff *skb)
 {
@@ -1177,6 +1210,11 @@ static void nfc_llcp_rx_work(struct work_struct *work)
                 pr_debug("SYMM\n");
                 break;
 
+        case LLCP_PDU_UI:
+                pr_debug("UI\n");
+                nfc_llcp_recv_ui(local, skb);
+                break;
+
         case LLCP_PDU_CONNECT:
                 pr_debug("CONNECT\n");
                 nfc_llcp_recv_connect(local, skb);
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 1c0a66fab570..e06d03571644 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -124,6 +124,13 @@ struct nfc_llcp_sock {
         struct sock *parent;
 };
 
+struct nfc_llcp_ui_cb {
+        __u8 dsap;
+        __u8 ssap;
+};
+
+#define nfc_llcp_ui_skb_cb(__skb) ((struct nfc_llcp_ui_cb *)&((__skb)->cb[0]))
+
 #define nfc_llcp_sock(sk) ((struct nfc_llcp_sock *) (sk))
 #define nfc_llcp_dev(sk)  (nfc_llcp_sock((sk))->dev)