Bluetooth: Add initial Bluetooth Management interface callbacks

Add initial code for handling Bluetooth Management interface messages.

Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Andrei Emeltchenko <andrei.emeltchenko@nokia.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 99 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
new file mode 100644
index 000000000000..d15bf676c350
--- /dev/null
+++ b/net/bluetooth/mgmt.c
@@ -0,0 +1,99 @@
+/*
+   BlueZ - Bluetooth protocol stack for Linux
+   Copyright (C) 2010  Nokia Corporation
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation;
+
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
+   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
+   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
+   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
+   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
+   SOFTWARE IS DISCLAIMED.
+*/
+
+/* Bluetooth HCI Management interface */
+
+#include <asm/uaccess.h>
+#include <asm/unaligned.h>
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/mgmt.h>
+
+static void cmd_status(struct sock *sk, u16 cmd, u8 status)
+{
+	struct sk_buff *skb;
+	struct mgmt_hdr *hdr;
+	struct mgmt_ev_cmd_status *ev;
+
+	BT_DBG("sock %p", sk);
+
+	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_ATOMIC);
+	if (!skb)
+		return;
+
+	hdr = (void *) skb_put(skb, sizeof(*hdr));
+
+	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
+	hdr->len = cpu_to_le16(sizeof(*ev));
+
+	ev = (void *) skb_put(skb, sizeof(*ev));
+	ev->status = status;
+	put_unaligned_le16(cmd, &ev->opcode);
+
+	if (sock_queue_rcv_skb(sk, skb) < 0)
+		kfree_skb(skb);
+}
+
+int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen)
+{
+	unsigned char *buf;
+	struct mgmt_hdr *hdr;
+	u16 opcode, len;
+	int err;
+
+	BT_DBG("got %zu bytes", msglen);
+
+	if (msglen < sizeof(*hdr))
+		return -EINVAL;
+
+	buf = kmalloc(msglen, GFP_ATOMIC);
+	if (!buf)
+		return -ENOMEM;
+
+	if (memcpy_fromiovec(buf, msg->msg_iov, msglen)) {
+		err = -EFAULT;
+		goto done;
+	}
+
+	hdr = (struct mgmt_hdr *) buf;
+	opcode = get_unaligned_le16(&hdr->opcode);
+	len = get_unaligned_le16(&hdr->len);
+
+	if (len != msglen - sizeof(*hdr)) {
+		err = -EINVAL;
+		goto done;
+	}
+
+	switch (opcode) {
+	default:
+		BT_DBG("Unknown op %u", opcode);
+		cmd_status(sk, opcode, 0x01);
+		break;
+	}
+
+	err = msglen;
+
+done:
+	kfree(buf);
+	return err;
+}