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NFC: UI frame sending routine implementation

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UI frames still need to follow the MIU rule, and they need to use the
client passed dsap as the listening socket dsap is stuck on SDP.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Samuel Ortiz 2012-10-16 15:01:40 +02:00
parent 31ca61a8df
commit 94f418a206
2 changed files with 48 additions and 0 deletions
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46
net/nfc/llcp/commands.c
View File

@ -579,6 +579,52 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
return len;
}
int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
struct msghdr *msg, size_t len)
{
struct sk_buff *pdu;
struct nfc_llcp_local *local;
size_t frag_len = 0, remaining_len;
u8 *msg_ptr;
int err;
pr_debug("Send UI frame len %zd\n", len);
local = sock->local;
if (local == NULL)
return -ENODEV;
remaining_len = len;
msg_ptr = (u8 *) msg->msg_iov;
while (remaining_len > 0) {
frag_len = min_t(size_t, sock->miu, remaining_len);
pr_debug("Fragment %zd bytes remaining %zd",
frag_len, remaining_len);
pdu = nfc_alloc_send_skb(sock->dev, &sock->sk, MSG_DONTWAIT,
frag_len + LLCP_HEADER_SIZE, &err);
if (pdu == NULL) {
pr_err("Could not allocate PDU\n");
continue;
}
pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI);
memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len);
/* No need to check for the peer RW for UI frames */
skb_queue_tail(&local->tx_queue, pdu);
remaining_len -= frag_len;
msg_ptr += frag_len;
}
return len;
}
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock)
{
struct sk_buff *skb;

2
net/nfc/llcp/llcp.h
View File

@ -221,6 +221,8 @@ int nfc_llcp_send_dm(struct nfc_llcp_local *local, u8 ssap, u8 dsap, u8 reason);
int nfc_llcp_send_disconnect(struct nfc_llcp_sock *sock);
int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
struct msghdr *msg, size_t len);
int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap,
struct msghdr *msg, size_t len);
int nfc_llcp_send_rr(struct nfc_llcp_sock *sock);
/* Socket API */