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authorSamuel Ortiz <sameo@linux.intel.com>2012-10-15 16:14:37 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2012-10-26 18:26:50 +0200
commit968272bf0087b9a4e19e876fddccd162da0390a8 (patch)
treeeb5087ea5dad9ea3807ad77dc9e39ee498073f63 /net/nfc
parentc8512be63bbf9216934ecd10e1f9e4f887076fc2 (diff)
downloadlinux-968272bf0087b9a4e19e876fddccd162da0390a8.tar.gz
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>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/llcp/llcp.c38
-rw-r--r--net/nfc/llcp/llcp.h7
2 files changed, 45 insertions, 0 deletions
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 7f92a857b31..a2da0a4f367 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 1c0a66fab57..e06d0357164 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)