Commit 968272bf authored by Samuel Ortiz's avatar Samuel Ortiz
Browse files

NFC: Handle LLCP UI frames



UI (Unnumbered Information) frames are used for sending data over
connection less links.
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent c8512be6
......@@ -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);
......
......@@ -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)
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment