diff options
| author | Samuel Ortiz <sameo@linux.intel.com> | 2012-10-15 16:14:37 +0200 |
|---|---|---|
| committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-10-26 18:26:50 +0200 |
| commit | 968272bf0087b9a4e19e876fddccd162da0390a8 (patch) | |
| tree | eb5087ea5dad9ea3807ad77dc9e39ee498073f63 /net | |
| parent | c8512be63bbf9216934ecd10e1f9e4f887076fc2 (diff) | |
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')
| -rw-r--r-- | net/nfc/llcp/llcp.c | 38 | ||||
| -rw-r--r-- | net/nfc/llcp/llcp.h | 7 |
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) |