Commit | Line | Data |
---|---|---|
0381101f JH |
1 | /* |
2 | BlueZ - Bluetooth protocol stack for Linux | |
3 | Copyright (C) 2010 Nokia Corporation | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License version 2 as | |
7 | published by the Free Software Foundation; | |
8 | ||
9 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS | |
10 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
11 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. | |
12 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY | |
13 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES | |
14 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
15 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
16 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
17 | ||
18 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, | |
19 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS | |
20 | SOFTWARE IS DISCLAIMED. | |
21 | */ | |
22 | ||
23 | /* Bluetooth HCI Management interface */ | |
24 | ||
25 | #include <asm/uaccess.h> | |
26 | #include <asm/unaligned.h> | |
27 | ||
28 | #include <net/bluetooth/bluetooth.h> | |
29 | #include <net/bluetooth/hci_core.h> | |
30 | #include <net/bluetooth/mgmt.h> | |
31 | ||
32 | static void cmd_status(struct sock *sk, u16 cmd, u8 status) | |
33 | { | |
34 | struct sk_buff *skb; | |
35 | struct mgmt_hdr *hdr; | |
36 | struct mgmt_ev_cmd_status *ev; | |
37 | ||
38 | BT_DBG("sock %p", sk); | |
39 | ||
40 | skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_ATOMIC); | |
41 | if (!skb) | |
42 | return; | |
43 | ||
44 | hdr = (void *) skb_put(skb, sizeof(*hdr)); | |
45 | ||
46 | hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS); | |
47 | hdr->len = cpu_to_le16(sizeof(*ev)); | |
48 | ||
49 | ev = (void *) skb_put(skb, sizeof(*ev)); | |
50 | ev->status = status; | |
51 | put_unaligned_le16(cmd, &ev->opcode); | |
52 | ||
53 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
54 | kfree_skb(skb); | |
55 | } | |
56 | ||
57 | int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) | |
58 | { | |
59 | unsigned char *buf; | |
60 | struct mgmt_hdr *hdr; | |
61 | u16 opcode, len; | |
62 | int err; | |
63 | ||
64 | BT_DBG("got %zu bytes", msglen); | |
65 | ||
66 | if (msglen < sizeof(*hdr)) | |
67 | return -EINVAL; | |
68 | ||
69 | buf = kmalloc(msglen, GFP_ATOMIC); | |
70 | if (!buf) | |
71 | return -ENOMEM; | |
72 | ||
73 | if (memcpy_fromiovec(buf, msg->msg_iov, msglen)) { | |
74 | err = -EFAULT; | |
75 | goto done; | |
76 | } | |
77 | ||
78 | hdr = (struct mgmt_hdr *) buf; | |
79 | opcode = get_unaligned_le16(&hdr->opcode); | |
80 | len = get_unaligned_le16(&hdr->len); | |
81 | ||
82 | if (len != msglen - sizeof(*hdr)) { | |
83 | err = -EINVAL; | |
84 | goto done; | |
85 | } | |
86 | ||
87 | switch (opcode) { | |
88 | default: | |
89 | BT_DBG("Unknown op %u", opcode); | |
90 | cmd_status(sk, opcode, 0x01); | |
91 | break; | |
92 | } | |
93 | ||
94 | err = msglen; | |
95 | ||
96 | done: | |
97 | kfree(buf); | |
98 | return err; | |
99 | } |