NFC: LLCP socket sendmsg implemetation
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index 151f2ef..f6c2257 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -397,3 +397,34 @@
return 0;
}
+
+int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock,
+ struct msghdr *msg, size_t len)
+{
+ struct sk_buff *pdu;
+ struct sock *sk;
+
+ pr_debug("Send I frame\n");
+
+ pdu = llcp_allocate_pdu(sock, LLCP_PDU_I, len + LLCP_SEQUENCE_SIZE);
+ if (pdu == NULL)
+ return -ENOMEM;
+
+ skb_put(pdu, LLCP_SEQUENCE_SIZE);
+
+ if (memcpy_fromiovec(skb_put(pdu, len), msg->msg_iov, len)) {
+ kfree_skb(pdu);
+ return -EFAULT;
+ }
+
+ skb_queue_head(&sock->tx_queue, pdu);
+
+ sk = &sock->sk;
+ lock_sock(sk);
+
+ nfc_llcp_queue_i_frames(sock);
+
+ release_sock(sk);
+
+ return 0;
+}
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 0a72ee6..36d8572 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -188,6 +188,8 @@
int nfc_llcp_send_cc(struct nfc_llcp_sock *sock);
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);
/* Socket API */
int __init nfc_llcp_sock_init(void);
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index f738ccd..b8bef36 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -482,6 +482,34 @@
return ret;
}
+static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
+ struct msghdr *msg, size_t len)
+{
+ struct sock *sk = sock->sk;
+ struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+ int ret;
+
+ pr_debug("sock %p sk %p", sock, sk);
+
+ ret = sock_error(sk);
+ if (ret)
+ return ret;
+
+ if (msg->msg_flags & MSG_OOB)
+ return -EOPNOTSUPP;
+
+ lock_sock(sk);
+
+ if (sk->sk_state != LLCP_CONNECTED) {
+ release_sock(sk);
+ return -ENOTCONN;
+ }
+
+ release_sock(sk);
+
+ return nfc_llcp_send_i_frame(llcp_sock, msg, len);
+}
+
static int llcp_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t len, int flags)
{
@@ -567,7 +595,7 @@
.shutdown = sock_no_shutdown,
.setsockopt = sock_no_setsockopt,
.getsockopt = sock_no_getsockopt,
- .sendmsg = sock_no_sendmsg,
+ .sendmsg = llcp_sock_sendmsg,
.recvmsg = llcp_sock_recvmsg,
.mmap = sock_no_mmap,
};