NFC: Handle LLCP UI frames
UI (Unnumbered Information) frames are used for sending data over
connection less links.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 7f92a85..a2da0a4 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -720,6 +720,39 @@
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 @@
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);