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