From: Samuel Ortiz <sameo@linux.intel.com>
Date: Tue, 16 Oct 2012 13:04:10 +0000 (+0200)
Subject: NFC: Implement LLCP connection less Tx path
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b874dec21d1cb7a08fcbe4e442a789419dd1d51f;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

NFC: Implement LLCP connection less Tx path

It simply involves getting the client dsap and ssap and calling the UI
frame building and sending routine.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
---

diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index d511a4c2fef6..0fa1e92ceac8 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -608,6 +608,25 @@ static int llcp_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
 
 	lock_sock(sk);
 
+	if (sk->sk_type == SOCK_DGRAM) {
+		struct sockaddr_nfc_llcp *addr =
+			(struct sockaddr_nfc_llcp *)msg->msg_name;
+
+		if (msg->msg_namelen < sizeof(*addr)) {
+			release_sock(sk);
+
+			pr_err("Invalid socket address length %d\n",
+			       msg->msg_namelen);
+
+			return -EINVAL;
+		}
+
+		release_sock(sk);
+
+		return nfc_llcp_send_ui_frame(llcp_sock, addr->dsap, addr->ssap,
+					      msg, len);
+	}
+
 	if (sk->sk_state != LLCP_CONNECTED) {
 		release_sock(sk);
 		return -ENOTCONN;