[linux-block.git] / net / bluetooth / hci_codec.c

// SPDX-License-Identifier: GPL-2.0

/* Copyright (C) 2021 Intel Corporation */

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
#include "hci_codec.h"

static int hci_codec_list_add(struct list_head *list,
			      struct hci_op_read_local_codec_caps *sent,
			      struct hci_rp_read_local_codec_caps *rp,
			      void *caps,
			      __u32 len)
{
	struct codec_list *entry;

	entry = kzalloc(sizeof(*entry) + len, GFP_KERNEL);
	if (!entry)
		return -ENOMEM;

	entry->id = sent->id;
	if (sent->id == 0xFF) {
		entry->cid = __le16_to_cpu(sent->cid);
		entry->vid = __le16_to_cpu(sent->vid);
	}
	entry->transport = sent->transport;
	entry->len = len;
	entry->num_caps = 0;
	if (rp) {
		entry->num_caps = rp->num_caps;
		memcpy(entry->caps, caps, len);
	}
	list_add(&entry->list, list);

	return 0;
}

void hci_codec_list_clear(struct list_head *codec_list)
{
	struct codec_list *c, *n;

	list_for_each_entry_safe(c, n, codec_list, list) {
		list_del(&c->list);
		kfree(c);
	}
}

static void hci_read_codec_capabilities(struct hci_dev *hdev, __u8 transport,
					struct hci_op_read_local_codec_caps
					*cmd)
{
	__u8 i;

	for (i = 0; i < TRANSPORT_TYPE_MAX; i++) {
		if (transport & BIT(i)) {
			struct hci_rp_read_local_codec_caps *rp;
			struct hci_codec_caps *caps;
			struct sk_buff *skb;
			__u8 j;
			__u32 len;

			cmd->transport = i;

			/* If Read_Codec_Capabilities command is not supported
			 * then just add codec to the list without caps
			 */
			if (!(hdev->commands[45] & 0x08)) {
				hci_dev_lock(hdev);
				hci_codec_list_add(&hdev->local_codecs, cmd,
						   NULL, NULL, 0);
				hci_dev_unlock(hdev);
				continue;
			}

			skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS,
					     sizeof(*cmd), cmd,
					     HCI_CMD_TIMEOUT);
			if (IS_ERR(skb)) {
				bt_dev_err(hdev, "Failed to read codec capabilities (%ld)",
					   PTR_ERR(skb));
				continue;
			}

			if (skb->len < sizeof(*rp))
				goto error;

			rp = (void *)skb->data;

			if (rp->status)
				goto error;

			if (!rp->num_caps) {
				len = 0;
				/* this codec doesn't have capabilities */
				goto skip_caps_parse;
			}

			skb_pull(skb, sizeof(*rp));

			for (j = 0, len = 0; j < rp->num_caps; j++) {
				caps = (void *)skb->data;
				if (skb->len < sizeof(*caps))
					goto error;
				if (skb->len < caps->len)
					goto error;
				len += sizeof(caps->len) + caps->len;
				skb_pull(skb,  sizeof(caps->len) + caps->len);
			}

skip_caps_parse:
			hci_dev_lock(hdev);
			hci_codec_list_add(&hdev->local_codecs, cmd, rp,
					   (__u8 *)rp + sizeof(*rp), len);
			hci_dev_unlock(hdev);
error:
			kfree_skb(skb);
		}
	}
}

void hci_read_supported_codecs(struct hci_dev *hdev)
{
	struct sk_buff *skb;
	struct hci_rp_read_local_supported_codecs *rp;
	struct hci_std_codecs *std_codecs;
	struct hci_vnd_codecs *vnd_codecs;
	struct hci_op_read_local_codec_caps caps;
	__u8 i;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL,
			     HCI_CMD_TIMEOUT);

	if (IS_ERR(skb)) {
		bt_dev_err(hdev, "Failed to read local supported codecs (%ld)",
			   PTR_ERR(skb));
		return;
	}

	if (skb->len < sizeof(*rp))
		goto error;

	rp = (void *)skb->data;

	if (rp->status)
		goto error;

	skb_pull(skb, sizeof(rp->status));

	std_codecs = (void *)skb->data;

	/* validate codecs length before accessing */
	if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
	    + sizeof(std_codecs->num))
		goto error;

	/* enumerate codec capabilities of standard codecs */
	memset(&caps, 0, sizeof(caps));
	for (i = 0; i < std_codecs->num; i++) {
		caps.id = std_codecs->codec[i];
		caps.direction = 0x00;
		hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps);
	}

	skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
		 + sizeof(std_codecs->num));

	vnd_codecs = (void *)skb->data;

	/* validate vendor codecs length before accessing */
	if (skb->len <
	    flex_array_size(vnd_codecs, codec, vnd_codecs->num)
	    + sizeof(vnd_codecs->num))
		goto error;

	/* enumerate vendor codec capabilities */
	for (i = 0; i < vnd_codecs->num; i++) {
		caps.id = 0xFF;
		caps.cid = vnd_codecs->codec[i].cid;
		caps.vid = vnd_codecs->codec[i].vid;
		caps.direction = 0x00;
		hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps);
	}

error:
	kfree_skb(skb);
}

void hci_read_supported_codecs_v2(struct hci_dev *hdev)
{
	struct sk_buff *skb;
	struct hci_rp_read_local_supported_codecs_v2 *rp;
	struct hci_std_codecs_v2 *std_codecs;
	struct hci_vnd_codecs_v2 *vnd_codecs;
	struct hci_op_read_local_codec_caps caps;
	__u8 i;

	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS_V2, 0, NULL,
			     HCI_CMD_TIMEOUT);

	if (IS_ERR(skb)) {
		bt_dev_err(hdev, "Failed to read local supported codecs (%ld)",
			   PTR_ERR(skb));
		return;
	}

	if (skb->len < sizeof(*rp))
		goto error;

	rp = (void *)skb->data;

	if (rp->status)
		goto error;

	skb_pull(skb, sizeof(rp->status));

	std_codecs = (void *)skb->data;

	/* check for payload data length before accessing */
	if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
	    + sizeof(std_codecs->num))
		goto error;

	memset(&caps, 0, sizeof(caps));

	for (i = 0; i < std_codecs->num; i++) {
		caps.id = std_codecs->codec[i].id;
		hci_read_codec_capabilities(hdev, std_codecs->codec[i].transport,
					    &caps);
	}

	skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
		 + sizeof(std_codecs->num));

	vnd_codecs = (void *)skb->data;

	/* check for payload data length before accessing */
	if (skb->len <
	    flex_array_size(vnd_codecs, codec, vnd_codecs->num)
	    + sizeof(vnd_codecs->num))
		goto error;

	for (i = 0; i < vnd_codecs->num; i++) {
		caps.id = 0xFF;
		caps.cid = vnd_codecs->codec[i].cid;
		caps.vid = vnd_codecs->codec[i].vid;
		hci_read_codec_capabilities(hdev, vnd_codecs->codec[i].transport,
					    &caps);
	}

error:
	kfree_skb(skb);
}
Commit	Line	Data
8961987f K	1	// SPDX-License-Identifier: GPL-2.0
	2
	3	/* Copyright (C) 2021 Intel Corporation */
	4
	5	#include <net/bluetooth/bluetooth.h>
	6	#include <net/bluetooth/hci_core.h>
	7	#include "hci_codec.h"
	8
	9	static int hci_codec_list_add(struct list_head *list,
	10	struct hci_op_read_local_codec_caps *sent,
	11	struct hci_rp_read_local_codec_caps *rp,
	12	void *caps,
	13	__u32 len)
	14	{
	15	struct codec_list *entry;
	16
	17	entry = kzalloc(sizeof(*entry) + len, GFP_KERNEL);
	18	if (!entry)
	19	return -ENOMEM;
	20
	21	entry->id = sent->id;
	22	if (sent->id == 0xFF) {
	23	entry->cid = __le16_to_cpu(sent->cid);
	24	entry->vid = __le16_to_cpu(sent->vid);
	25	}
	26	entry->transport = sent->transport;
	27	entry->len = len;
107fe048 K	28	entry->num_caps = 0;
	29	if (rp) {
	30	entry->num_caps = rp->num_caps;
8961987f	31	memcpy(entry->caps, caps, len);
107fe048	32	}
8961987f K	33	list_add(&entry->list, list);
	34
	35	return 0;
	36	}
	37
	38	void hci_codec_list_clear(struct list_head *codec_list)
	39	{
	40	struct codec_list c, n;
	41
	42	list_for_each_entry_safe(c, n, codec_list, list) {
	43	list_del(&c->list);
	44	kfree(c);
	45	}
	46	}
	47
	48	static void hci_read_codec_capabilities(struct hci_dev *hdev, __u8 transport,
	49	struct hci_op_read_local_codec_caps
	50	*cmd)
	51	{
	52	__u8 i;
	53
	54	for (i = 0; i < TRANSPORT_TYPE_MAX; i++) {
	55	if (transport & BIT(i)) {
	56	struct hci_rp_read_local_codec_caps *rp;
	57	struct hci_codec_caps *caps;
	58	struct sk_buff *skb;
	59	__u8 j;
	60	__u32 len;
	61
	62	cmd->transport = i;
107fe048 K	63
	64	/* If Read_Codec_Capabilities command is not supported
	65	* then just add codec to the list without caps
	66	*/
	67	if (!(hdev->commands[45] & 0x08)) {
	68	hci_dev_lock(hdev);
	69	hci_codec_list_add(&hdev->local_codecs, cmd,
	70	NULL, NULL, 0);
	71	hci_dev_unlock(hdev);
	72	continue;
	73	}
	74
8961987f K	75	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODEC_CAPS,
	76	sizeof(*cmd), cmd,
	77	HCI_CMD_TIMEOUT);
	78	if (IS_ERR(skb)) {
	79	bt_dev_err(hdev, "Failed to read codec capabilities (%ld)",
	80	PTR_ERR(skb));
	81	continue;
	82	}
	83
	84	if (skb->len < sizeof(*rp))
	85	goto error;
	86
	87	rp = (void *)skb->data;
	88
	89	if (rp->status)
	90	goto error;
	91
	92	if (!rp->num_caps) {
	93	len = 0;
	94	/* this codec doesn't have capabilities */
	95	goto skip_caps_parse;
	96	}
	97
	98	skb_pull(skb, sizeof(*rp));
	99
	100	for (j = 0, len = 0; j < rp->num_caps; j++) {
	101	caps = (void *)skb->data;
	102	if (skb->len < sizeof(*caps))
	103	goto error;
	104	if (skb->len < caps->len)
	105	goto error;
	106	len += sizeof(caps->len) + caps->len;
	107	skb_pull(skb, sizeof(caps->len) + caps->len);
	108	}
	109
	110	skip_caps_parse:
	111	hci_dev_lock(hdev);
	112	hci_codec_list_add(&hdev->local_codecs, cmd, rp,
	113	(__u8 )rp + sizeof(rp), len);
	114	hci_dev_unlock(hdev);
	115	error:
	116	kfree_skb(skb);
	117	}
	118	}
	119	}
	120
	121	void hci_read_supported_codecs(struct hci_dev *hdev)
	122	{
	123	struct sk_buff *skb;
	124	struct hci_rp_read_local_supported_codecs *rp;
	125	struct hci_std_codecs *std_codecs;
	126	struct hci_vnd_codecs *vnd_codecs;
	127	struct hci_op_read_local_codec_caps caps;
	128	__u8 i;
	129
	130	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS, 0, NULL,
	131	HCI_CMD_TIMEOUT);
	132
	133	if (IS_ERR(skb)) {
	134	bt_dev_err(hdev, "Failed to read local supported codecs (%ld)",
	135	PTR_ERR(skb));
	136	return;
	137	}
	138
139	if (skb->len < sizeof(*rp))
140	goto error;
141
142	rp = (void *)skb->data;
143
144	if (rp->status)
145	goto error;
146
147	skb_pull(skb, sizeof(rp->status));
148
149	std_codecs = (void *)skb->data;
150
151	/* validate codecs length before accessing */
152	if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
153	+ sizeof(std_codecs->num))
154	goto error;
155
156	/* enumerate codec capabilities of standard codecs */
157	memset(&caps, 0, sizeof(caps));
158	for (i = 0; i < std_codecs->num; i++) {
159	caps.id = std_codecs->codec[i];
160	caps.direction = 0x00;
161	hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps);
162	}
163
164	skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
165	+ sizeof(std_codecs->num));
166
167	vnd_codecs = (void *)skb->data;
168
169	/* validate vendor codecs length before accessing */
170	if (skb->len <
171	flex_array_size(vnd_codecs, codec, vnd_codecs->num)
172	+ sizeof(vnd_codecs->num))
173	goto error;
174
175	/* enumerate vendor codec capabilities */
176	for (i = 0; i < vnd_codecs->num; i++) {
177	caps.id = 0xFF;
178	caps.cid = vnd_codecs->codec[i].cid;
179	caps.vid = vnd_codecs->codec[i].vid;
180	caps.direction = 0x00;
181	hci_read_codec_capabilities(hdev, LOCAL_CODEC_ACL_MASK, &caps);
182	}
183
184	error:
185	kfree_skb(skb);
186	}
9ae66402 K	187
	188	void hci_read_supported_codecs_v2(struct hci_dev *hdev)
	189	{
	190	struct sk_buff *skb;
	191	struct hci_rp_read_local_supported_codecs_v2 *rp;
	192	struct hci_std_codecs_v2 *std_codecs;
	193	struct hci_vnd_codecs_v2 *vnd_codecs;
	194	struct hci_op_read_local_codec_caps caps;
	195	__u8 i;
	196
	197	skb = __hci_cmd_sync(hdev, HCI_OP_READ_LOCAL_CODECS_V2, 0, NULL,
	198	HCI_CMD_TIMEOUT);
	199
	200	if (IS_ERR(skb)) {
	201	bt_dev_err(hdev, "Failed to read local supported codecs (%ld)",
	202	PTR_ERR(skb));
	203	return;
	204	}
	205
	206	if (skb->len < sizeof(*rp))
	207	goto error;
	208
	209	rp = (void *)skb->data;
	210
	211	if (rp->status)
	212	goto error;
	213
	214	skb_pull(skb, sizeof(rp->status));
	215
	216	std_codecs = (void *)skb->data;
	217
	218	/* check for payload data length before accessing */
	219	if (skb->len < flex_array_size(std_codecs, codec, std_codecs->num)
	220	+ sizeof(std_codecs->num))
	221	goto error;
	222
	223	memset(&caps, 0, sizeof(caps));
	224
	225	for (i = 0; i < std_codecs->num; i++) {
	226	caps.id = std_codecs->codec[i].id;
	227	hci_read_codec_capabilities(hdev, std_codecs->codec[i].transport,
	228	&caps);
	229	}
	230
	231	skb_pull(skb, flex_array_size(std_codecs, codec, std_codecs->num)
	232	+ sizeof(std_codecs->num));
	233
	234	vnd_codecs = (void *)skb->data;
	235
	236	/* check for payload data length before accessing */
	237	if (skb->len <
	238	flex_array_size(vnd_codecs, codec, vnd_codecs->num)
	239	+ sizeof(vnd_codecs->num))
	240	goto error;
	241
	242	for (i = 0; i < vnd_codecs->num; i++) {
	243	caps.id = 0xFF;
	244	caps.cid = vnd_codecs->codec[i].cid;
	245	caps.vid = vnd_codecs->codec[i].vid;
	246	hci_read_codec_capabilities(hdev, vnd_codecs->codec[i].transport,
	247	&caps);
	248	}
	249
	250	error:
251	kfree_skb(skb);
252	}