summaryrefslogtreecommitdiffstats
path: root/net/bluetooth/mgmt_util.c
blob: 8c30c7eb8bef58ea1471f646a39c8739fa0e82c0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
/*
   BlueZ - Bluetooth protocol stack for Linux

   Copyright (C) 2015  Intel 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.
*/

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/mgmt.h>

#include "mgmt_util.h"

int mgmt_send_event(u16 event, struct hci_dev *hdev, unsigned short channel,
		    void *data, u16 data_len, int flag, struct sock *skip_sk)
{
	struct sk_buff *skb;
	struct mgmt_hdr *hdr;

	skb = alloc_skb(sizeof(*hdr) + data_len, GFP_KERNEL);
	if (!skb)
		return -ENOMEM;

	hdr = (void *) skb_put(skb, sizeof(*hdr));
	hdr->opcode = cpu_to_le16(event);
	if (hdev)
		hdr->index = cpu_to_le16(hdev->id);
	else
		hdr->index = cpu_to_le16(MGMT_INDEX_NONE);
	hdr->len = cpu_to_le16(data_len);

	if (data)
		memcpy(skb_put(skb, data_len), data, data_len);

	/* Time stamp */
	__net_timestamp(skb);

	hci_send_to_channel(channel, skb, flag, skip_sk);
	kfree_skb(skb);

	return 0;
}

int mgmt_cmd_status(struct sock *sk, u16 index, u16 cmd, u8 status)
{
	struct sk_buff *skb;
	struct mgmt_hdr *hdr;
	struct mgmt_ev_cmd_status *ev;
	int err;

	BT_DBG("sock %p, index %u, cmd %u, status %u", sk, index, cmd, status);

	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL);
	if (!skb)
		return -ENOMEM;

	hdr = (void *) skb_put(skb, sizeof(*hdr));

	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_STATUS);
	hdr->index = cpu_to_le16(index);
	hdr->len = cpu_to_le16(sizeof(*ev));

	ev = (void *) skb_put(skb, sizeof(*ev));
	ev->status = status;
	ev->opcode = cpu_to_le16(cmd);

	err = sock_queue_rcv_skb(sk, skb);
	if (err < 0)
		kfree_skb(skb);

	return err;
}

int mgmt_cmd_complete(struct sock *sk, u16 index, u16 cmd, u8 status,
		      void *rp, size_t rp_len)
{
	struct sk_buff *skb;
	struct mgmt_hdr *hdr;
	struct mgmt_ev_cmd_complete *ev;
	int err;

	BT_DBG("sock %p", sk);

	skb = alloc_skb(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL);
	if (!skb)
		return -ENOMEM;

	hdr = (void *) skb_put(skb, sizeof(*hdr));

	hdr->opcode = cpu_to_le16(MGMT_EV_CMD_COMPLETE);
	hdr->index = cpu_to_le16(index);
	hdr->len = cpu_to_le16(sizeof(*ev) + rp_len);

	ev = (void *) skb_put(skb, sizeof(*ev) + rp_len);
	ev->opcode = cpu_to_le16(cmd);
	ev->status = status;

	if (rp)
		memcpy(ev->data, rp, rp_len);

	err = sock_queue_rcv_skb(sk, skb);
	if (err < 0)
		kfree_skb(skb);

	return err;
}

struct mgmt_pending_cmd *mgmt_pending_find(unsigned short channel, u16 opcode,
					   struct hci_dev *hdev)
{
	struct mgmt_pending_cmd *cmd;

	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
		if (hci_sock_get_channel(cmd->sk) != channel)
			continue;
		if (cmd->opcode == opcode)
			return cmd;
	}

	return NULL;
}

struct mgmt_pending_cmd *mgmt_pending_find_data(unsigned short channel,
						u16 opcode,
						struct hci_dev *hdev,
						const void *data)
{
	struct mgmt_pending_cmd *cmd;

	list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
		if (cmd->user_data != data)
			continue;
		if (cmd->opcode == opcode)
			return cmd;
	}

	return NULL;
}

void mgmt_pending_foreach(u16 opcode, struct hci_dev *hdev,
			  void (*cb)(struct mgmt_pending_cmd *cmd, void *data),
			  void *data)
{
	struct mgmt_pending_cmd *cmd, *tmp;

	list_for_each_entry_safe(cmd, tmp, &hdev->mgmt_pending, list) {
		if (opcode > 0 && cmd->opcode != opcode)
			continue;

		cb(cmd, data);
	}
}

struct mgmt_pending_cmd *mgmt_pending_add(struct sock *sk, u16 opcode,
					  struct hci_dev *hdev,
					  void *data, u16 len)
{
	struct mgmt_pending_cmd *cmd;

	cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
	if (!cmd)
		return NULL;

	cmd->opcode = opcode;
	cmd->index = hdev->id;

	cmd->param = kmemdup(data, len, GFP_KERNEL);
	if (!cmd->param) {
		kfree(cmd);
		return NULL;
	}

	cmd->param_len = len;

	cmd->sk = sk;
	sock_hold(sk);

	list_add(&cmd->list, &hdev->mgmt_pending);

	return cmd;
}

void mgmt_pending_free(struct mgmt_pending_cmd *cmd)
{
	sock_put(cmd->sk);
	kfree(cmd->param);
	kfree(cmd);
}

void mgmt_pending_remove(struct mgmt_pending_cmd *cmd)
{
	list_del(&cmd->list);
	mgmt_pending_free(cmd);
}