Commit | Line | Data |
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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 | ||
02d98129 JH |
32 | #define MGMT_VERSION 0 |
33 | #define MGMT_REVISION 1 | |
34 | ||
35 | static int read_version(struct sock *sk) | |
36 | { | |
37 | struct sk_buff *skb; | |
38 | struct mgmt_hdr *hdr; | |
39 | struct mgmt_ev_cmd_complete *ev; | |
40 | struct mgmt_rp_read_version *rp; | |
41 | ||
42 | BT_DBG("sock %p", sk); | |
43 | ||
44 | skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + sizeof(*rp), GFP_ATOMIC); | |
45 | if (!skb) | |
46 | return -ENOMEM; | |
47 | ||
48 | hdr = (void *) skb_put(skb, sizeof(*hdr)); | |
49 | hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE); | |
50 | hdr->len = cpu_to_le16(sizeof(*ev) + sizeof(*rp)); | |
51 | ||
52 | ev = (void *) skb_put(skb, sizeof(*ev)); | |
53 | put_unaligned_le16(MGMT_OP_READ_VERSION, &ev->opcode); | |
54 | ||
55 | rp = (void *) skb_put(skb, sizeof(*rp)); | |
56 | rp->version = MGMT_VERSION; | |
57 | put_unaligned_le16(MGMT_REVISION, &rp->revision); | |
58 | ||
59 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
60 | kfree_skb(skb); | |
61 | ||
62 | return 0; | |
63 | } | |
64 | ||
faba42eb JH |
65 | static int read_index_list(struct sock *sk) |
66 | { | |
67 | struct sk_buff *skb; | |
68 | struct mgmt_hdr *hdr; | |
69 | struct mgmt_ev_cmd_complete *ev; | |
70 | struct mgmt_rp_read_index_list *rp; | |
71 | struct list_head *p; | |
72 | size_t body_len; | |
73 | u16 count; | |
74 | int i; | |
75 | ||
76 | BT_DBG("sock %p", sk); | |
77 | ||
78 | read_lock(&hci_dev_list_lock); | |
79 | ||
80 | count = 0; | |
81 | list_for_each(p, &hci_dev_list) { | |
82 | count++; | |
83 | } | |
84 | ||
85 | body_len = sizeof(*ev) + sizeof(*rp) + (2 * count); | |
86 | skb = alloc_skb(sizeof(*hdr) + body_len, GFP_ATOMIC); | |
87 | if (!skb) | |
88 | return -ENOMEM; | |
89 | ||
90 | hdr = (void *) skb_put(skb, sizeof(*hdr)); | |
91 | hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE); | |
92 | hdr->len = cpu_to_le16(body_len); | |
93 | ||
94 | ev = (void *) skb_put(skb, sizeof(*ev)); | |
95 | put_unaligned_le16(MGMT_OP_READ_INDEX_LIST, &ev->opcode); | |
96 | ||
97 | rp = (void *) skb_put(skb, sizeof(*rp) + (2 * count)); | |
98 | put_unaligned_le16(count, &rp->num_controllers); | |
99 | ||
100 | i = 0; | |
101 | list_for_each(p, &hci_dev_list) { | |
102 | struct hci_dev *d = list_entry(p, struct hci_dev, list); | |
103 | put_unaligned_le16(d->id, &rp->index[i++]); | |
104 | BT_DBG("Added hci%u", d->id); | |
105 | } | |
106 | ||
107 | read_unlock(&hci_dev_list_lock); | |
108 | ||
109 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
110 | kfree_skb(skb); | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
e41d8b4e | 115 | static int cmd_status(struct sock *sk, u16 cmd, u8 status) |
0381101f JH |
116 | { |
117 | struct sk_buff *skb; | |
118 | struct mgmt_hdr *hdr; | |
119 | struct mgmt_ev_cmd_status *ev; | |
120 | ||
121 | BT_DBG("sock %p", sk); | |
122 | ||
123 | skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_ATOMIC); | |
124 | if (!skb) | |
e41d8b4e | 125 | return -ENOMEM; |
0381101f JH |
126 | |
127 | hdr = (void *) skb_put(skb, sizeof(*hdr)); | |
128 | ||
129 | hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS); | |
130 | hdr->len = cpu_to_le16(sizeof(*ev)); | |
131 | ||
132 | ev = (void *) skb_put(skb, sizeof(*ev)); | |
133 | ev->status = status; | |
134 | put_unaligned_le16(cmd, &ev->opcode); | |
135 | ||
136 | if (sock_queue_rcv_skb(sk, skb) < 0) | |
137 | kfree_skb(skb); | |
e41d8b4e JH |
138 | |
139 | return 0; | |
0381101f JH |
140 | } |
141 | ||
142 | int mgmt_control(struct sock *sk, struct msghdr *msg, size_t msglen) | |
143 | { | |
144 | unsigned char *buf; | |
145 | struct mgmt_hdr *hdr; | |
146 | u16 opcode, len; | |
147 | int err; | |
148 | ||
149 | BT_DBG("got %zu bytes", msglen); | |
150 | ||
151 | if (msglen < sizeof(*hdr)) | |
152 | return -EINVAL; | |
153 | ||
154 | buf = kmalloc(msglen, GFP_ATOMIC); | |
155 | if (!buf) | |
156 | return -ENOMEM; | |
157 | ||
158 | if (memcpy_fromiovec(buf, msg->msg_iov, msglen)) { | |
159 | err = -EFAULT; | |
160 | goto done; | |
161 | } | |
162 | ||
163 | hdr = (struct mgmt_hdr *) buf; | |
164 | opcode = get_unaligned_le16(&hdr->opcode); | |
165 | len = get_unaligned_le16(&hdr->len); | |
166 | ||
167 | if (len != msglen - sizeof(*hdr)) { | |
168 | err = -EINVAL; | |
169 | goto done; | |
170 | } | |
171 | ||
172 | switch (opcode) { | |
02d98129 JH |
173 | case MGMT_OP_READ_VERSION: |
174 | err = read_version(sk); | |
175 | break; | |
faba42eb JH |
176 | case MGMT_OP_READ_INDEX_LIST: |
177 | err = read_index_list(sk); | |
178 | break; | |
0381101f JH |
179 | default: |
180 | BT_DBG("Unknown op %u", opcode); | |
e41d8b4e | 181 | err = cmd_status(sk, opcode, 0x01); |
0381101f JH |
182 | break; |
183 | } | |
184 | ||
e41d8b4e JH |
185 | if (err < 0) |
186 | goto done; | |
187 | ||
0381101f JH |
188 | err = msglen; |
189 | ||
190 | done: | |
191 | kfree(buf); | |
192 | return err; | |
193 | } |