mirror of
https://github.com/torvalds/linux.git
synced 2024-11-06 03:51:48 +00:00
e41d8b4e13
The command handlers for bluetooth management messaging should be able to report errors (such as memory allocation failures) to the higher levels in the call stack. Signed-off-by: Johan Hedberg <johan.hedberg@nokia.com> Acked-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
/*
|
|
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 int 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 -ENOMEM;
|
|
|
|
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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
err = cmd_status(sk, opcode, 0x01);
|
|
break;
|
|
}
|
|
|
|
if (err < 0)
|
|
goto done;
|
|
|
|
err = msglen;
|
|
|
|
done:
|
|
kfree(buf);
|
|
return err;
|
|
}
|