1879 lines
37 KiB
C
1879 lines
37 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* BlueZ - Bluetooth protocol stack for Linux
|
|
*
|
|
* Copyright (C) 2022 Intel Corporation
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/seq_file.h>
|
|
#include <linux/sched/signal.h>
|
|
|
|
#include <net/bluetooth/bluetooth.h>
|
|
#include <net/bluetooth/hci_core.h>
|
|
#include <net/bluetooth/iso.h>
|
|
|
|
static const struct proto_ops iso_sock_ops;
|
|
|
|
static struct bt_sock_list iso_sk_list = {
|
|
.lock = __RW_LOCK_UNLOCKED(iso_sk_list.lock)
|
|
};
|
|
|
|
/* ---- ISO connections ---- */
|
|
struct iso_conn {
|
|
struct hci_conn *hcon;
|
|
|
|
/* @lock: spinlock protecting changes to iso_conn fields */
|
|
spinlock_t lock;
|
|
struct sock *sk;
|
|
|
|
struct delayed_work timeout_work;
|
|
|
|
struct sk_buff *rx_skb;
|
|
__u32 rx_len;
|
|
__u16 tx_sn;
|
|
};
|
|
|
|
#define iso_conn_lock(c) spin_lock(&(c)->lock)
|
|
#define iso_conn_unlock(c) spin_unlock(&(c)->lock)
|
|
|
|
static void iso_sock_close(struct sock *sk);
|
|
static void iso_sock_kill(struct sock *sk);
|
|
|
|
/* ----- ISO socket info ----- */
|
|
#define iso_pi(sk) ((struct iso_pinfo *)sk)
|
|
|
|
#define EIR_SERVICE_DATA_LENGTH 4
|
|
#define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH)
|
|
|
|
struct iso_pinfo {
|
|
struct bt_sock bt;
|
|
bdaddr_t src;
|
|
__u8 src_type;
|
|
bdaddr_t dst;
|
|
__u8 dst_type;
|
|
__u8 bc_sid;
|
|
__u8 bc_num_bis;
|
|
__u8 bc_bis[ISO_MAX_NUM_BIS];
|
|
__u16 sync_handle;
|
|
__u32 flags;
|
|
struct bt_iso_qos qos;
|
|
__u8 base_len;
|
|
__u8 base[BASE_MAX_LENGTH];
|
|
struct iso_conn *conn;
|
|
};
|
|
|
|
/* ---- ISO timers ---- */
|
|
#define ISO_CONN_TIMEOUT (HZ * 40)
|
|
#define ISO_DISCONN_TIMEOUT (HZ * 2)
|
|
|
|
static void iso_sock_timeout(struct work_struct *work)
|
|
{
|
|
struct iso_conn *conn = container_of(work, struct iso_conn,
|
|
timeout_work.work);
|
|
struct sock *sk;
|
|
|
|
iso_conn_lock(conn);
|
|
sk = conn->sk;
|
|
if (sk)
|
|
sock_hold(sk);
|
|
iso_conn_unlock(conn);
|
|
|
|
if (!sk)
|
|
return;
|
|
|
|
BT_DBG("sock %p state %d", sk, sk->sk_state);
|
|
|
|
lock_sock(sk);
|
|
sk->sk_err = ETIMEDOUT;
|
|
sk->sk_state_change(sk);
|
|
release_sock(sk);
|
|
sock_put(sk);
|
|
}
|
|
|
|
static void iso_sock_set_timer(struct sock *sk, long timeout)
|
|
{
|
|
if (!iso_pi(sk)->conn)
|
|
return;
|
|
|
|
BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
|
|
cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
|
|
schedule_delayed_work(&iso_pi(sk)->conn->timeout_work, timeout);
|
|
}
|
|
|
|
static void iso_sock_clear_timer(struct sock *sk)
|
|
{
|
|
if (!iso_pi(sk)->conn)
|
|
return;
|
|
|
|
BT_DBG("sock %p state %d", sk, sk->sk_state);
|
|
cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
|
|
}
|
|
|
|
/* ---- ISO connections ---- */
|
|
static struct iso_conn *iso_conn_add(struct hci_conn *hcon)
|
|
{
|
|
struct iso_conn *conn = hcon->iso_data;
|
|
|
|
if (conn)
|
|
return conn;
|
|
|
|
conn = kzalloc(sizeof(*conn), GFP_KERNEL);
|
|
if (!conn)
|
|
return NULL;
|
|
|
|
spin_lock_init(&conn->lock);
|
|
INIT_DELAYED_WORK(&conn->timeout_work, iso_sock_timeout);
|
|
|
|
hcon->iso_data = conn;
|
|
conn->hcon = hcon;
|
|
conn->tx_sn = 0;
|
|
|
|
BT_DBG("hcon %p conn %p", hcon, conn);
|
|
|
|
return conn;
|
|
}
|
|
|
|
/* Delete channel. Must be called on the locked socket. */
|
|
static void iso_chan_del(struct sock *sk, int err)
|
|
{
|
|
struct iso_conn *conn;
|
|
struct sock *parent;
|
|
|
|
conn = iso_pi(sk)->conn;
|
|
|
|
BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
|
|
|
|
if (conn) {
|
|
iso_conn_lock(conn);
|
|
conn->sk = NULL;
|
|
iso_pi(sk)->conn = NULL;
|
|
iso_conn_unlock(conn);
|
|
|
|
if (conn->hcon)
|
|
hci_conn_drop(conn->hcon);
|
|
}
|
|
|
|
sk->sk_state = BT_CLOSED;
|
|
sk->sk_err = err;
|
|
|
|
parent = bt_sk(sk)->parent;
|
|
if (parent) {
|
|
bt_accept_unlink(sk);
|
|
parent->sk_data_ready(parent);
|
|
} else {
|
|
sk->sk_state_change(sk);
|
|
}
|
|
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
}
|
|
|
|
static void iso_conn_del(struct hci_conn *hcon, int err)
|
|
{
|
|
struct iso_conn *conn = hcon->iso_data;
|
|
struct sock *sk;
|
|
|
|
if (!conn)
|
|
return;
|
|
|
|
BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
|
|
|
|
/* Kill socket */
|
|
iso_conn_lock(conn);
|
|
sk = conn->sk;
|
|
if (sk)
|
|
sock_hold(sk);
|
|
iso_conn_unlock(conn);
|
|
|
|
if (sk) {
|
|
lock_sock(sk);
|
|
iso_sock_clear_timer(sk);
|
|
iso_chan_del(sk, err);
|
|
release_sock(sk);
|
|
sock_put(sk);
|
|
}
|
|
|
|
/* Ensure no more work items will run before freeing conn. */
|
|
cancel_delayed_work_sync(&conn->timeout_work);
|
|
|
|
hcon->iso_data = NULL;
|
|
kfree(conn);
|
|
}
|
|
|
|
static int __iso_chan_add(struct iso_conn *conn, struct sock *sk,
|
|
struct sock *parent)
|
|
{
|
|
BT_DBG("conn %p", conn);
|
|
|
|
if (iso_pi(sk)->conn == conn && conn->sk == sk)
|
|
return 0;
|
|
|
|
if (conn->sk) {
|
|
BT_ERR("conn->sk already set");
|
|
return -EBUSY;
|
|
}
|
|
|
|
iso_pi(sk)->conn = conn;
|
|
conn->sk = sk;
|
|
|
|
if (parent)
|
|
bt_accept_enqueue(parent, sk, true);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iso_chan_add(struct iso_conn *conn, struct sock *sk,
|
|
struct sock *parent)
|
|
{
|
|
int err;
|
|
|
|
iso_conn_lock(conn);
|
|
err = __iso_chan_add(conn, sk, parent);
|
|
iso_conn_unlock(conn);
|
|
|
|
return err;
|
|
}
|
|
|
|
static inline u8 le_addr_type(u8 bdaddr_type)
|
|
{
|
|
if (bdaddr_type == BDADDR_LE_PUBLIC)
|
|
return ADDR_LE_DEV_PUBLIC;
|
|
else
|
|
return ADDR_LE_DEV_RANDOM;
|
|
}
|
|
|
|
static int iso_connect_bis(struct sock *sk)
|
|
{
|
|
struct iso_conn *conn;
|
|
struct hci_conn *hcon;
|
|
struct hci_dev *hdev;
|
|
int err;
|
|
|
|
BT_DBG("%pMR", &iso_pi(sk)->src);
|
|
|
|
hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
|
|
iso_pi(sk)->src_type);
|
|
if (!hdev)
|
|
return -EHOSTUNREACH;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
if (!bis_capable(hdev)) {
|
|
err = -EOPNOTSUPP;
|
|
goto unlock;
|
|
}
|
|
|
|
/* Fail if out PHYs are marked as disabled */
|
|
if (!iso_pi(sk)->qos.out.phy) {
|
|
err = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
hcon = hci_connect_bis(hdev, &iso_pi(sk)->dst,
|
|
le_addr_type(iso_pi(sk)->dst_type),
|
|
&iso_pi(sk)->qos, iso_pi(sk)->base_len,
|
|
iso_pi(sk)->base);
|
|
if (IS_ERR(hcon)) {
|
|
err = PTR_ERR(hcon);
|
|
goto unlock;
|
|
}
|
|
|
|
conn = iso_conn_add(hcon);
|
|
if (!conn) {
|
|
hci_conn_drop(hcon);
|
|
err = -ENOMEM;
|
|
goto unlock;
|
|
}
|
|
|
|
hci_dev_unlock(hdev);
|
|
hci_dev_put(hdev);
|
|
|
|
lock_sock(sk);
|
|
|
|
/* Update source addr of the socket */
|
|
bacpy(&iso_pi(sk)->src, &hcon->src);
|
|
|
|
err = iso_chan_add(conn, sk, NULL);
|
|
if (err)
|
|
goto release;
|
|
|
|
if (hcon->state == BT_CONNECTED) {
|
|
iso_sock_clear_timer(sk);
|
|
sk->sk_state = BT_CONNECTED;
|
|
} else {
|
|
sk->sk_state = BT_CONNECT;
|
|
iso_sock_set_timer(sk, sk->sk_sndtimeo);
|
|
}
|
|
|
|
release:
|
|
release_sock(sk);
|
|
return err;
|
|
|
|
unlock:
|
|
hci_dev_unlock(hdev);
|
|
hci_dev_put(hdev);
|
|
return err;
|
|
}
|
|
|
|
static int iso_connect_cis(struct sock *sk)
|
|
{
|
|
struct iso_conn *conn;
|
|
struct hci_conn *hcon;
|
|
struct hci_dev *hdev;
|
|
int err;
|
|
|
|
BT_DBG("%pMR -> %pMR", &iso_pi(sk)->src, &iso_pi(sk)->dst);
|
|
|
|
hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
|
|
iso_pi(sk)->src_type);
|
|
if (!hdev)
|
|
return -EHOSTUNREACH;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
if (!cis_central_capable(hdev)) {
|
|
err = -EOPNOTSUPP;
|
|
goto unlock;
|
|
}
|
|
|
|
/* Fail if either PHYs are marked as disabled */
|
|
if (!iso_pi(sk)->qos.in.phy && !iso_pi(sk)->qos.out.phy) {
|
|
err = -EINVAL;
|
|
goto unlock;
|
|
}
|
|
|
|
/* Just bind if DEFER_SETUP has been set */
|
|
if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
|
|
hcon = hci_bind_cis(hdev, &iso_pi(sk)->dst,
|
|
le_addr_type(iso_pi(sk)->dst_type),
|
|
&iso_pi(sk)->qos);
|
|
if (IS_ERR(hcon)) {
|
|
err = PTR_ERR(hcon);
|
|
goto unlock;
|
|
}
|
|
} else {
|
|
hcon = hci_connect_cis(hdev, &iso_pi(sk)->dst,
|
|
le_addr_type(iso_pi(sk)->dst_type),
|
|
&iso_pi(sk)->qos);
|
|
if (IS_ERR(hcon)) {
|
|
err = PTR_ERR(hcon);
|
|
goto unlock;
|
|
}
|
|
}
|
|
|
|
conn = iso_conn_add(hcon);
|
|
if (!conn) {
|
|
hci_conn_drop(hcon);
|
|
err = -ENOMEM;
|
|
goto unlock;
|
|
}
|
|
|
|
hci_dev_unlock(hdev);
|
|
hci_dev_put(hdev);
|
|
|
|
lock_sock(sk);
|
|
|
|
/* Update source addr of the socket */
|
|
bacpy(&iso_pi(sk)->src, &hcon->src);
|
|
|
|
err = iso_chan_add(conn, sk, NULL);
|
|
if (err)
|
|
goto release;
|
|
|
|
if (hcon->state == BT_CONNECTED) {
|
|
iso_sock_clear_timer(sk);
|
|
sk->sk_state = BT_CONNECTED;
|
|
} else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
|
|
iso_sock_clear_timer(sk);
|
|
sk->sk_state = BT_CONNECT;
|
|
} else {
|
|
sk->sk_state = BT_CONNECT;
|
|
iso_sock_set_timer(sk, sk->sk_sndtimeo);
|
|
}
|
|
|
|
release:
|
|
release_sock(sk);
|
|
return err;
|
|
|
|
unlock:
|
|
hci_dev_unlock(hdev);
|
|
hci_dev_put(hdev);
|
|
return err;
|
|
}
|
|
|
|
static struct bt_iso_qos *iso_sock_get_qos(struct sock *sk)
|
|
{
|
|
if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONNECT2)
|
|
return &iso_pi(sk)->conn->hcon->iso_qos;
|
|
|
|
return &iso_pi(sk)->qos;
|
|
}
|
|
|
|
static int iso_send_frame(struct sock *sk, struct sk_buff *skb)
|
|
{
|
|
struct iso_conn *conn = iso_pi(sk)->conn;
|
|
struct bt_iso_qos *qos = iso_sock_get_qos(sk);
|
|
struct hci_iso_data_hdr *hdr;
|
|
int len = 0;
|
|
|
|
BT_DBG("sk %p len %d", sk, skb->len);
|
|
|
|
if (skb->len > qos->out.sdu)
|
|
return -EMSGSIZE;
|
|
|
|
len = skb->len;
|
|
|
|
/* Push ISO data header */
|
|
hdr = skb_push(skb, HCI_ISO_DATA_HDR_SIZE);
|
|
hdr->sn = cpu_to_le16(conn->tx_sn++);
|
|
hdr->slen = cpu_to_le16(hci_iso_data_len_pack(len,
|
|
HCI_ISO_STATUS_VALID));
|
|
|
|
if (sk->sk_state == BT_CONNECTED)
|
|
hci_send_iso(conn->hcon, skb);
|
|
else
|
|
len = -ENOTCONN;
|
|
|
|
return len;
|
|
}
|
|
|
|
static void iso_recv_frame(struct iso_conn *conn, struct sk_buff *skb)
|
|
{
|
|
struct sock *sk;
|
|
|
|
iso_conn_lock(conn);
|
|
sk = conn->sk;
|
|
iso_conn_unlock(conn);
|
|
|
|
if (!sk)
|
|
goto drop;
|
|
|
|
BT_DBG("sk %p len %d", sk, skb->len);
|
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
goto drop;
|
|
|
|
if (!sock_queue_rcv_skb(sk, skb))
|
|
return;
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
/* -------- Socket interface ---------- */
|
|
static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *ba)
|
|
{
|
|
struct sock *sk;
|
|
|
|
sk_for_each(sk, &iso_sk_list.head) {
|
|
if (sk->sk_state != BT_LISTEN)
|
|
continue;
|
|
|
|
if (!bacmp(&iso_pi(sk)->src, ba))
|
|
return sk;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc,
|
|
__u8 sid)
|
|
{
|
|
struct sock *sk;
|
|
|
|
sk_for_each(sk, &iso_sk_list.head) {
|
|
if (sk->sk_state != BT_LISTEN)
|
|
continue;
|
|
|
|
if (bacmp(&iso_pi(sk)->src, ba))
|
|
continue;
|
|
|
|
if (bacmp(&iso_pi(sk)->dst, bc))
|
|
continue;
|
|
|
|
if (iso_pi(sk)->bc_sid == sid)
|
|
return sk;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
typedef bool (*iso_sock_match_t)(struct sock *sk, void *data);
|
|
|
|
/* Find socket listening:
|
|
* source bdaddr (Unicast)
|
|
* destination bdaddr (Broadcast only)
|
|
* match func - pass NULL to ignore
|
|
* match func data - pass -1 to ignore
|
|
* Returns closest match.
|
|
*/
|
|
static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst,
|
|
iso_sock_match_t match, void *data)
|
|
{
|
|
struct sock *sk = NULL, *sk1 = NULL;
|
|
|
|
read_lock(&iso_sk_list.lock);
|
|
|
|
sk_for_each(sk, &iso_sk_list.head) {
|
|
if (sk->sk_state != BT_LISTEN)
|
|
continue;
|
|
|
|
/* Match Broadcast destination */
|
|
if (bacmp(dst, BDADDR_ANY) && bacmp(&iso_pi(sk)->dst, dst))
|
|
continue;
|
|
|
|
/* Use Match function if provided */
|
|
if (match && !match(sk, data))
|
|
continue;
|
|
|
|
/* Exact match. */
|
|
if (!bacmp(&iso_pi(sk)->src, src))
|
|
break;
|
|
|
|
/* Closest match */
|
|
if (!bacmp(&iso_pi(sk)->src, BDADDR_ANY))
|
|
sk1 = sk;
|
|
}
|
|
|
|
read_unlock(&iso_sk_list.lock);
|
|
|
|
return sk ? sk : sk1;
|
|
}
|
|
|
|
static void iso_sock_destruct(struct sock *sk)
|
|
{
|
|
BT_DBG("sk %p", sk);
|
|
|
|
skb_queue_purge(&sk->sk_receive_queue);
|
|
skb_queue_purge(&sk->sk_write_queue);
|
|
}
|
|
|
|
static void iso_sock_cleanup_listen(struct sock *parent)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("parent %p", parent);
|
|
|
|
/* Close not yet accepted channels */
|
|
while ((sk = bt_accept_dequeue(parent, NULL))) {
|
|
iso_sock_close(sk);
|
|
iso_sock_kill(sk);
|
|
}
|
|
|
|
parent->sk_state = BT_CLOSED;
|
|
sock_set_flag(parent, SOCK_ZAPPED);
|
|
}
|
|
|
|
/* Kill socket (only if zapped and orphan)
|
|
* Must be called on unlocked socket.
|
|
*/
|
|
static void iso_sock_kill(struct sock *sk)
|
|
{
|
|
if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket ||
|
|
sock_flag(sk, SOCK_DEAD))
|
|
return;
|
|
|
|
BT_DBG("sk %p state %d", sk, sk->sk_state);
|
|
|
|
/* Kill poor orphan */
|
|
bt_sock_unlink(&iso_sk_list, sk);
|
|
sock_set_flag(sk, SOCK_DEAD);
|
|
sock_put(sk);
|
|
}
|
|
|
|
static void iso_conn_defer_reject(struct hci_conn *conn)
|
|
{
|
|
struct hci_cp_le_reject_cis cp;
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
memset(&cp, 0, sizeof(cp));
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
cp.reason = HCI_ERROR_REJ_BAD_ADDR;
|
|
hci_send_cmd(conn->hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
|
|
}
|
|
|
|
static void __iso_sock_close(struct sock *sk)
|
|
{
|
|
BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
|
|
|
|
switch (sk->sk_state) {
|
|
case BT_LISTEN:
|
|
iso_sock_cleanup_listen(sk);
|
|
break;
|
|
|
|
case BT_CONNECTED:
|
|
case BT_CONFIG:
|
|
if (iso_pi(sk)->conn->hcon) {
|
|
sk->sk_state = BT_DISCONN;
|
|
iso_sock_set_timer(sk, ISO_DISCONN_TIMEOUT);
|
|
iso_conn_lock(iso_pi(sk)->conn);
|
|
hci_conn_drop(iso_pi(sk)->conn->hcon);
|
|
iso_pi(sk)->conn->hcon = NULL;
|
|
iso_conn_unlock(iso_pi(sk)->conn);
|
|
} else {
|
|
iso_chan_del(sk, ECONNRESET);
|
|
}
|
|
break;
|
|
|
|
case BT_CONNECT2:
|
|
if (iso_pi(sk)->conn->hcon)
|
|
iso_conn_defer_reject(iso_pi(sk)->conn->hcon);
|
|
iso_chan_del(sk, ECONNRESET);
|
|
break;
|
|
case BT_CONNECT:
|
|
/* In case of DEFER_SETUP the hcon would be bound to CIG which
|
|
* needs to be removed so just call hci_conn_del so the cleanup
|
|
* callback do what is needed.
|
|
*/
|
|
if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags) &&
|
|
iso_pi(sk)->conn->hcon) {
|
|
hci_conn_del(iso_pi(sk)->conn->hcon);
|
|
iso_pi(sk)->conn->hcon = NULL;
|
|
}
|
|
|
|
iso_chan_del(sk, ECONNRESET);
|
|
break;
|
|
case BT_DISCONN:
|
|
iso_chan_del(sk, ECONNRESET);
|
|
break;
|
|
|
|
default:
|
|
sock_set_flag(sk, SOCK_ZAPPED);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Must be called on unlocked socket. */
|
|
static void iso_sock_close(struct sock *sk)
|
|
{
|
|
iso_sock_clear_timer(sk);
|
|
lock_sock(sk);
|
|
__iso_sock_close(sk);
|
|
release_sock(sk);
|
|
iso_sock_kill(sk);
|
|
}
|
|
|
|
static void iso_sock_init(struct sock *sk, struct sock *parent)
|
|
{
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (parent) {
|
|
sk->sk_type = parent->sk_type;
|
|
bt_sk(sk)->flags = bt_sk(parent)->flags;
|
|
security_sk_clone(parent, sk);
|
|
}
|
|
}
|
|
|
|
static struct proto iso_proto = {
|
|
.name = "ISO",
|
|
.owner = THIS_MODULE,
|
|
.obj_size = sizeof(struct iso_pinfo)
|
|
};
|
|
|
|
#define DEFAULT_IO_QOS \
|
|
{ \
|
|
.interval = 10000u, \
|
|
.latency = 10u, \
|
|
.sdu = 40u, \
|
|
.phy = BT_ISO_PHY_2M, \
|
|
.rtn = 2u, \
|
|
}
|
|
|
|
static struct bt_iso_qos default_qos = {
|
|
.cig = BT_ISO_QOS_CIG_UNSET,
|
|
.cis = BT_ISO_QOS_CIS_UNSET,
|
|
.sca = 0x00,
|
|
.packing = 0x00,
|
|
.framing = 0x00,
|
|
.in = DEFAULT_IO_QOS,
|
|
.out = DEFAULT_IO_QOS,
|
|
};
|
|
|
|
static struct sock *iso_sock_alloc(struct net *net, struct socket *sock,
|
|
int proto, gfp_t prio, int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
sk = sk_alloc(net, PF_BLUETOOTH, prio, &iso_proto, kern);
|
|
if (!sk)
|
|
return NULL;
|
|
|
|
sock_init_data(sock, sk);
|
|
INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
|
|
|
|
sk->sk_destruct = iso_sock_destruct;
|
|
sk->sk_sndtimeo = ISO_CONN_TIMEOUT;
|
|
|
|
sock_reset_flag(sk, SOCK_ZAPPED);
|
|
|
|
sk->sk_protocol = proto;
|
|
sk->sk_state = BT_OPEN;
|
|
|
|
/* Set address type as public as default src address is BDADDR_ANY */
|
|
iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
|
|
|
|
iso_pi(sk)->qos = default_qos;
|
|
|
|
bt_sock_link(&iso_sk_list, sk);
|
|
return sk;
|
|
}
|
|
|
|
static int iso_sock_create(struct net *net, struct socket *sock, int protocol,
|
|
int kern)
|
|
{
|
|
struct sock *sk;
|
|
|
|
BT_DBG("sock %p", sock);
|
|
|
|
sock->state = SS_UNCONNECTED;
|
|
|
|
if (sock->type != SOCK_SEQPACKET)
|
|
return -ESOCKTNOSUPPORT;
|
|
|
|
sock->ops = &iso_sock_ops;
|
|
|
|
sk = iso_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
|
|
if (!sk)
|
|
return -ENOMEM;
|
|
|
|
iso_sock_init(sk, NULL);
|
|
return 0;
|
|
}
|
|
|
|
static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr,
|
|
int addr_len)
|
|
{
|
|
struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
|
|
struct sock *sk = sock->sk;
|
|
int i;
|
|
|
|
BT_DBG("sk %p bc_sid %u bc_num_bis %u", sk, sa->iso_bc->bc_sid,
|
|
sa->iso_bc->bc_num_bis);
|
|
|
|
if (addr_len > sizeof(*sa) + sizeof(*sa->iso_bc) ||
|
|
sa->iso_bc->bc_num_bis < 0x01 || sa->iso_bc->bc_num_bis > 0x1f)
|
|
return -EINVAL;
|
|
|
|
bacpy(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr);
|
|
iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type;
|
|
iso_pi(sk)->sync_handle = -1;
|
|
iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid;
|
|
iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
|
|
|
|
for (i = 0; i < iso_pi(sk)->bc_num_bis; i++) {
|
|
if (sa->iso_bc->bc_bis[i] < 0x01 ||
|
|
sa->iso_bc->bc_bis[i] > 0x1f)
|
|
return -EINVAL;
|
|
|
|
memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
|
|
iso_pi(sk)->bc_num_bis);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
|
|
int addr_len)
|
|
{
|
|
struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sk %p %pMR type %u", sk, &sa->iso_bdaddr, sa->iso_bdaddr_type);
|
|
|
|
if (!addr || addr_len < sizeof(struct sockaddr_iso) ||
|
|
addr->sa_family != AF_BLUETOOTH)
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state != BT_OPEN) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
if (sk->sk_type != SOCK_SEQPACKET) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
/* Check if the address type is of LE type */
|
|
if (!bdaddr_type_is_le(sa->iso_bdaddr_type)) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
bacpy(&iso_pi(sk)->src, &sa->iso_bdaddr);
|
|
iso_pi(sk)->src_type = sa->iso_bdaddr_type;
|
|
|
|
/* Check for Broadcast address */
|
|
if (addr_len > sizeof(*sa)) {
|
|
err = iso_sock_bind_bc(sock, addr, addr_len);
|
|
if (err)
|
|
goto done;
|
|
}
|
|
|
|
sk->sk_state = BT_BOUND;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_connect(struct socket *sock, struct sockaddr *addr,
|
|
int alen, int flags)
|
|
{
|
|
struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
|
|
struct sock *sk = sock->sk;
|
|
int err;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (alen < sizeof(struct sockaddr_iso) ||
|
|
addr->sa_family != AF_BLUETOOTH)
|
|
return -EINVAL;
|
|
|
|
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
|
|
return -EBADFD;
|
|
|
|
if (sk->sk_type != SOCK_SEQPACKET)
|
|
return -EINVAL;
|
|
|
|
/* Check if the address type is of LE type */
|
|
if (!bdaddr_type_is_le(sa->iso_bdaddr_type))
|
|
return -EINVAL;
|
|
|
|
lock_sock(sk);
|
|
|
|
bacpy(&iso_pi(sk)->dst, &sa->iso_bdaddr);
|
|
iso_pi(sk)->dst_type = sa->iso_bdaddr_type;
|
|
|
|
release_sock(sk);
|
|
|
|
if (bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
|
|
err = iso_connect_cis(sk);
|
|
else
|
|
err = iso_connect_bis(sk);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
lock_sock(sk);
|
|
|
|
if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
|
|
err = bt_sock_wait_state(sk, BT_CONNECTED,
|
|
sock_sndtimeo(sk, flags & O_NONBLOCK));
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int iso_listen_bis(struct sock *sk)
|
|
{
|
|
struct hci_dev *hdev;
|
|
int err = 0;
|
|
|
|
BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src,
|
|
&iso_pi(sk)->dst, iso_pi(sk)->bc_sid);
|
|
|
|
write_lock(&iso_sk_list.lock);
|
|
|
|
if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst,
|
|
iso_pi(sk)->bc_sid))
|
|
err = -EADDRINUSE;
|
|
|
|
write_unlock(&iso_sk_list.lock);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
|
|
iso_pi(sk)->src_type);
|
|
if (!hdev)
|
|
return -EHOSTUNREACH;
|
|
|
|
hci_dev_lock(hdev);
|
|
|
|
err = hci_pa_create_sync(hdev, &iso_pi(sk)->dst,
|
|
le_addr_type(iso_pi(sk)->dst_type),
|
|
iso_pi(sk)->bc_sid);
|
|
|
|
hci_dev_unlock(hdev);
|
|
hci_dev_put(hdev);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int iso_listen_cis(struct sock *sk)
|
|
{
|
|
int err = 0;
|
|
|
|
BT_DBG("%pMR", &iso_pi(sk)->src);
|
|
|
|
write_lock(&iso_sk_list.lock);
|
|
|
|
if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src))
|
|
err = -EADDRINUSE;
|
|
|
|
write_unlock(&iso_sk_list.lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_listen(struct socket *sock, int backlog)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sk %p backlog %d", sk, backlog);
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state != BT_BOUND) {
|
|
err = -EBADFD;
|
|
goto done;
|
|
}
|
|
|
|
if (sk->sk_type != SOCK_SEQPACKET) {
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
|
|
err = iso_listen_cis(sk);
|
|
else
|
|
err = iso_listen_bis(sk);
|
|
|
|
if (err)
|
|
goto done;
|
|
|
|
sk->sk_max_ack_backlog = backlog;
|
|
sk->sk_ack_backlog = 0;
|
|
|
|
sk->sk_state = BT_LISTEN;
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_accept(struct socket *sock, struct socket *newsock,
|
|
int flags, bool kern)
|
|
{
|
|
DEFINE_WAIT_FUNC(wait, woken_wake_function);
|
|
struct sock *sk = sock->sk, *ch;
|
|
long timeo;
|
|
int err = 0;
|
|
|
|
lock_sock(sk);
|
|
|
|
timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
|
|
|
|
BT_DBG("sk %p timeo %ld", sk, timeo);
|
|
|
|
/* Wait for an incoming connection. (wake-one). */
|
|
add_wait_queue_exclusive(sk_sleep(sk), &wait);
|
|
while (1) {
|
|
if (sk->sk_state != BT_LISTEN) {
|
|
err = -EBADFD;
|
|
break;
|
|
}
|
|
|
|
ch = bt_accept_dequeue(sk, newsock);
|
|
if (ch)
|
|
break;
|
|
|
|
if (!timeo) {
|
|
err = -EAGAIN;
|
|
break;
|
|
}
|
|
|
|
if (signal_pending(current)) {
|
|
err = sock_intr_errno(timeo);
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
|
|
timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
|
|
lock_sock(sk);
|
|
}
|
|
remove_wait_queue(sk_sleep(sk), &wait);
|
|
|
|
if (err)
|
|
goto done;
|
|
|
|
newsock->state = SS_CONNECTED;
|
|
|
|
BT_DBG("new socket %p", ch);
|
|
|
|
done:
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_getname(struct socket *sock, struct sockaddr *addr,
|
|
int peer)
|
|
{
|
|
struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
|
|
struct sock *sk = sock->sk;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
addr->sa_family = AF_BLUETOOTH;
|
|
|
|
if (peer) {
|
|
bacpy(&sa->iso_bdaddr, &iso_pi(sk)->dst);
|
|
sa->iso_bdaddr_type = iso_pi(sk)->dst_type;
|
|
} else {
|
|
bacpy(&sa->iso_bdaddr, &iso_pi(sk)->src);
|
|
sa->iso_bdaddr_type = iso_pi(sk)->src_type;
|
|
}
|
|
|
|
return sizeof(struct sockaddr_iso);
|
|
}
|
|
|
|
static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t len)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct iso_conn *conn = iso_pi(sk)->conn;
|
|
struct sk_buff *skb, **frag;
|
|
int err;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
err = sock_error(sk);
|
|
if (err)
|
|
return err;
|
|
|
|
if (msg->msg_flags & MSG_OOB)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (sk->sk_state != BT_CONNECTED)
|
|
return -ENOTCONN;
|
|
|
|
skb = bt_skb_sendmsg(sk, msg, len, conn->hcon->hdev->iso_mtu,
|
|
HCI_ISO_DATA_HDR_SIZE, 0);
|
|
if (IS_ERR(skb))
|
|
return PTR_ERR(skb);
|
|
|
|
len -= skb->len;
|
|
|
|
BT_DBG("skb %p len %d", sk, skb->len);
|
|
|
|
/* Continuation fragments */
|
|
frag = &skb_shinfo(skb)->frag_list;
|
|
while (len) {
|
|
struct sk_buff *tmp;
|
|
|
|
tmp = bt_skb_sendmsg(sk, msg, len, conn->hcon->hdev->iso_mtu,
|
|
0, 0);
|
|
if (IS_ERR(tmp)) {
|
|
kfree_skb(skb);
|
|
return PTR_ERR(tmp);
|
|
}
|
|
|
|
*frag = tmp;
|
|
|
|
len -= tmp->len;
|
|
|
|
skb->len += tmp->len;
|
|
skb->data_len += tmp->len;
|
|
|
|
BT_DBG("frag %p len %d", *frag, tmp->len);
|
|
|
|
frag = &(*frag)->next;
|
|
}
|
|
|
|
lock_sock(sk);
|
|
|
|
if (sk->sk_state == BT_CONNECTED)
|
|
err = iso_send_frame(sk, skb);
|
|
else
|
|
err = -ENOTCONN;
|
|
|
|
release_sock(sk);
|
|
|
|
if (err < 0)
|
|
kfree_skb(skb);
|
|
return err;
|
|
}
|
|
|
|
static void iso_conn_defer_accept(struct hci_conn *conn)
|
|
{
|
|
struct hci_cp_le_accept_cis cp;
|
|
struct hci_dev *hdev = conn->hdev;
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
conn->state = BT_CONFIG;
|
|
|
|
cp.handle = cpu_to_le16(conn->handle);
|
|
|
|
hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
|
|
}
|
|
|
|
static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t len, int flags)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
struct iso_pinfo *pi = iso_pi(sk);
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
|
|
switch (sk->sk_state) {
|
|
case BT_CONNECT2:
|
|
lock_sock(sk);
|
|
iso_conn_defer_accept(pi->conn->hcon);
|
|
sk->sk_state = BT_CONFIG;
|
|
release_sock(sk);
|
|
return 0;
|
|
case BT_CONNECT:
|
|
return iso_connect_cis(sk);
|
|
}
|
|
}
|
|
|
|
return bt_sock_recvmsg(sock, msg, len, flags);
|
|
}
|
|
|
|
static bool check_io_qos(struct bt_iso_io_qos *qos)
|
|
{
|
|
/* If no PHY is enable SDU must be 0 */
|
|
if (!qos->phy && qos->sdu)
|
|
return false;
|
|
|
|
if (qos->interval && (qos->interval < 0xff || qos->interval > 0xfffff))
|
|
return false;
|
|
|
|
if (qos->latency && (qos->latency < 0x05 || qos->latency > 0xfa0))
|
|
return false;
|
|
|
|
if (qos->phy > BT_ISO_PHY_ANY)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool check_qos(struct bt_iso_qos *qos)
|
|
{
|
|
if (qos->sca > 0x07)
|
|
return false;
|
|
|
|
if (qos->packing > 0x01)
|
|
return false;
|
|
|
|
if (qos->framing > 0x01)
|
|
return false;
|
|
|
|
if (!check_io_qos(&qos->in))
|
|
return false;
|
|
|
|
if (!check_io_qos(&qos->out))
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int iso_sock_setsockopt(struct socket *sock, int level, int optname,
|
|
sockptr_t optval, unsigned int optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int len, err = 0;
|
|
struct bt_iso_qos qos;
|
|
u32 opt;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case BT_DEFER_SETUP:
|
|
if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (opt)
|
|
set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
|
|
else
|
|
clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
|
|
break;
|
|
|
|
case BT_ISO_QOS:
|
|
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
|
|
sk->sk_state != BT_CONNECT2) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
len = min_t(unsigned int, sizeof(qos), optlen);
|
|
if (len != sizeof(qos)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
memset(&qos, 0, sizeof(qos));
|
|
|
|
if (copy_from_sockptr(&qos, optval, len)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
if (!check_qos(&qos)) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
iso_pi(sk)->qos = qos;
|
|
|
|
break;
|
|
|
|
case BT_ISO_BASE:
|
|
if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
|
|
sk->sk_state != BT_CONNECT2) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (optlen > sizeof(iso_pi(sk)->base)) {
|
|
err = -EOVERFLOW;
|
|
break;
|
|
}
|
|
|
|
len = min_t(unsigned int, sizeof(iso_pi(sk)->base), optlen);
|
|
|
|
if (copy_from_sockptr(iso_pi(sk)->base, optval, len)) {
|
|
err = -EFAULT;
|
|
break;
|
|
}
|
|
|
|
iso_pi(sk)->base_len = len;
|
|
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
|
|
char __user *optval, int __user *optlen)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int len, err = 0;
|
|
struct bt_iso_qos *qos;
|
|
u8 base_len;
|
|
u8 *base;
|
|
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (get_user(len, optlen))
|
|
return -EFAULT;
|
|
|
|
lock_sock(sk);
|
|
|
|
switch (optname) {
|
|
case BT_DEFER_SETUP:
|
|
if (sk->sk_state == BT_CONNECTED) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
|
|
(u32 __user *)optval))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case BT_ISO_QOS:
|
|
qos = iso_sock_get_qos(sk);
|
|
|
|
len = min_t(unsigned int, len, sizeof(*qos));
|
|
if (copy_to_user(optval, qos, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
case BT_ISO_BASE:
|
|
if (sk->sk_state == BT_CONNECTED) {
|
|
base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len;
|
|
base = iso_pi(sk)->conn->hcon->le_per_adv_data;
|
|
} else {
|
|
base_len = iso_pi(sk)->base_len;
|
|
base = iso_pi(sk)->base;
|
|
}
|
|
|
|
len = min_t(unsigned int, len, base_len);
|
|
if (copy_to_user(optval, base, len))
|
|
err = -EFAULT;
|
|
|
|
break;
|
|
|
|
default:
|
|
err = -ENOPROTOOPT;
|
|
break;
|
|
}
|
|
|
|
release_sock(sk);
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_shutdown(struct socket *sock, int how)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sock %p, sk %p, how %d", sock, sk, how);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
sock_hold(sk);
|
|
lock_sock(sk);
|
|
|
|
switch (how) {
|
|
case SHUT_RD:
|
|
if (sk->sk_shutdown & RCV_SHUTDOWN)
|
|
goto unlock;
|
|
sk->sk_shutdown |= RCV_SHUTDOWN;
|
|
break;
|
|
case SHUT_WR:
|
|
if (sk->sk_shutdown & SEND_SHUTDOWN)
|
|
goto unlock;
|
|
sk->sk_shutdown |= SEND_SHUTDOWN;
|
|
break;
|
|
case SHUT_RDWR:
|
|
if (sk->sk_shutdown & SHUTDOWN_MASK)
|
|
goto unlock;
|
|
sk->sk_shutdown |= SHUTDOWN_MASK;
|
|
break;
|
|
}
|
|
|
|
iso_sock_clear_timer(sk);
|
|
__iso_sock_close(sk);
|
|
|
|
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
|
|
!(current->flags & PF_EXITING))
|
|
err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
|
|
|
|
unlock:
|
|
release_sock(sk);
|
|
sock_put(sk);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int iso_sock_release(struct socket *sock)
|
|
{
|
|
struct sock *sk = sock->sk;
|
|
int err = 0;
|
|
|
|
BT_DBG("sock %p, sk %p", sock, sk);
|
|
|
|
if (!sk)
|
|
return 0;
|
|
|
|
iso_sock_close(sk);
|
|
|
|
if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
|
|
!(current->flags & PF_EXITING)) {
|
|
lock_sock(sk);
|
|
err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
|
|
release_sock(sk);
|
|
}
|
|
|
|
sock_orphan(sk);
|
|
iso_sock_kill(sk);
|
|
return err;
|
|
}
|
|
|
|
static void iso_sock_ready(struct sock *sk)
|
|
{
|
|
BT_DBG("sk %p", sk);
|
|
|
|
if (!sk)
|
|
return;
|
|
|
|
lock_sock(sk);
|
|
iso_sock_clear_timer(sk);
|
|
sk->sk_state = BT_CONNECTED;
|
|
sk->sk_state_change(sk);
|
|
release_sock(sk);
|
|
}
|
|
|
|
struct iso_list_data {
|
|
struct hci_conn *hcon;
|
|
int count;
|
|
};
|
|
|
|
static bool iso_match_big(struct sock *sk, void *data)
|
|
{
|
|
struct hci_evt_le_big_sync_estabilished *ev = data;
|
|
|
|
return ev->handle == iso_pi(sk)->qos.big;
|
|
}
|
|
|
|
static void iso_conn_ready(struct iso_conn *conn)
|
|
{
|
|
struct sock *parent;
|
|
struct sock *sk = conn->sk;
|
|
struct hci_ev_le_big_sync_estabilished *ev;
|
|
|
|
BT_DBG("conn %p", conn);
|
|
|
|
if (sk) {
|
|
iso_sock_ready(conn->sk);
|
|
} else {
|
|
iso_conn_lock(conn);
|
|
|
|
if (!conn->hcon) {
|
|
iso_conn_unlock(conn);
|
|
return;
|
|
}
|
|
|
|
ev = hci_recv_event_data(conn->hcon->hdev,
|
|
HCI_EVT_LE_BIG_SYNC_ESTABILISHED);
|
|
if (ev)
|
|
parent = iso_get_sock_listen(&conn->hcon->src,
|
|
&conn->hcon->dst,
|
|
iso_match_big, ev);
|
|
else
|
|
parent = iso_get_sock_listen(&conn->hcon->src,
|
|
BDADDR_ANY, NULL, NULL);
|
|
|
|
if (!parent) {
|
|
iso_conn_unlock(conn);
|
|
return;
|
|
}
|
|
|
|
lock_sock(parent);
|
|
|
|
sk = iso_sock_alloc(sock_net(parent), NULL,
|
|
BTPROTO_ISO, GFP_ATOMIC, 0);
|
|
if (!sk) {
|
|
release_sock(parent);
|
|
iso_conn_unlock(conn);
|
|
return;
|
|
}
|
|
|
|
iso_sock_init(sk, parent);
|
|
|
|
bacpy(&iso_pi(sk)->src, &conn->hcon->src);
|
|
iso_pi(sk)->src_type = conn->hcon->src_type;
|
|
|
|
/* If hcon has no destination address (BDADDR_ANY) it means it
|
|
* was created by HCI_EV_LE_BIG_SYNC_ESTABILISHED so we need to
|
|
* initialize using the parent socket destination address.
|
|
*/
|
|
if (!bacmp(&conn->hcon->dst, BDADDR_ANY)) {
|
|
bacpy(&conn->hcon->dst, &iso_pi(parent)->dst);
|
|
conn->hcon->dst_type = iso_pi(parent)->dst_type;
|
|
conn->hcon->sync_handle = iso_pi(parent)->sync_handle;
|
|
}
|
|
|
|
bacpy(&iso_pi(sk)->dst, &conn->hcon->dst);
|
|
iso_pi(sk)->dst_type = conn->hcon->dst_type;
|
|
|
|
hci_conn_hold(conn->hcon);
|
|
__iso_chan_add(conn, sk, parent);
|
|
|
|
if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
|
|
sk->sk_state = BT_CONNECT2;
|
|
else
|
|
sk->sk_state = BT_CONNECTED;
|
|
|
|
/* Wake up parent */
|
|
parent->sk_data_ready(parent);
|
|
|
|
release_sock(parent);
|
|
|
|
iso_conn_unlock(conn);
|
|
}
|
|
}
|
|
|
|
static bool iso_match_sid(struct sock *sk, void *data)
|
|
{
|
|
struct hci_ev_le_pa_sync_established *ev = data;
|
|
|
|
return ev->sid == iso_pi(sk)->bc_sid;
|
|
}
|
|
|
|
static bool iso_match_sync_handle(struct sock *sk, void *data)
|
|
{
|
|
struct hci_evt_le_big_info_adv_report *ev = data;
|
|
|
|
return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
|
|
}
|
|
|
|
/* ----- ISO interface with lower layer (HCI) ----- */
|
|
|
|
int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
|
|
{
|
|
struct hci_ev_le_pa_sync_established *ev1;
|
|
struct hci_evt_le_big_info_adv_report *ev2;
|
|
struct sock *sk;
|
|
int lm = 0;
|
|
|
|
bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
|
|
|
|
/* Broadcast receiver requires handling of some events before it can
|
|
* proceed to establishing a BIG sync:
|
|
*
|
|
* 1. HCI_EV_LE_PA_SYNC_ESTABLISHED: The socket may specify a specific
|
|
* SID to listen to and once sync is estabilished its handle needs to
|
|
* be stored in iso_pi(sk)->sync_handle so it can be matched once
|
|
* receiving the BIG Info.
|
|
* 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a
|
|
* a BIG Info it attempts to check if there any listening socket with
|
|
* the same sync_handle and if it does then attempt to create a sync.
|
|
*/
|
|
ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED);
|
|
if (ev1) {
|
|
sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr, iso_match_sid,
|
|
ev1);
|
|
if (sk)
|
|
iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle);
|
|
|
|
goto done;
|
|
}
|
|
|
|
ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT);
|
|
if (ev2) {
|
|
sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
|
|
iso_match_sync_handle, ev2);
|
|
if (sk) {
|
|
int err;
|
|
|
|
if (ev2->num_bis < iso_pi(sk)->bc_num_bis)
|
|
iso_pi(sk)->bc_num_bis = ev2->num_bis;
|
|
|
|
err = hci_le_big_create_sync(hdev,
|
|
&iso_pi(sk)->qos,
|
|
iso_pi(sk)->sync_handle,
|
|
iso_pi(sk)->bc_num_bis,
|
|
iso_pi(sk)->bc_bis);
|
|
if (err) {
|
|
bt_dev_err(hdev, "hci_le_big_create_sync: %d",
|
|
err);
|
|
sk = NULL;
|
|
}
|
|
}
|
|
} else {
|
|
sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL);
|
|
}
|
|
|
|
done:
|
|
if (!sk)
|
|
return lm;
|
|
|
|
lm |= HCI_LM_ACCEPT;
|
|
|
|
if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
|
|
*flags |= HCI_PROTO_DEFER;
|
|
|
|
return lm;
|
|
}
|
|
|
|
static void iso_connect_cfm(struct hci_conn *hcon, __u8 status)
|
|
{
|
|
if (hcon->type != ISO_LINK) {
|
|
if (hcon->type != LE_LINK)
|
|
return;
|
|
|
|
/* Check if LE link has failed */
|
|
if (status) {
|
|
if (hcon->link)
|
|
iso_conn_del(hcon->link, bt_to_errno(status));
|
|
return;
|
|
}
|
|
|
|
/* Create CIS if pending */
|
|
hci_le_create_cis(hcon);
|
|
return;
|
|
}
|
|
|
|
BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
|
|
|
|
if (!status) {
|
|
struct iso_conn *conn;
|
|
|
|
conn = iso_conn_add(hcon);
|
|
if (conn)
|
|
iso_conn_ready(conn);
|
|
} else {
|
|
iso_conn_del(hcon, bt_to_errno(status));
|
|
}
|
|
}
|
|
|
|
static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason)
|
|
{
|
|
if (hcon->type != ISO_LINK)
|
|
return;
|
|
|
|
BT_DBG("hcon %p reason %d", hcon, reason);
|
|
|
|
iso_conn_del(hcon, bt_to_errno(reason));
|
|
}
|
|
|
|
void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
|
|
{
|
|
struct iso_conn *conn = hcon->iso_data;
|
|
struct hci_iso_data_hdr *hdr;
|
|
__u16 pb, ts, len;
|
|
|
|
if (!conn)
|
|
goto drop;
|
|
|
|
pb = hci_iso_flags_pb(flags);
|
|
ts = hci_iso_flags_ts(flags);
|
|
|
|
BT_DBG("conn %p len %d pb 0x%x ts 0x%x", conn, skb->len, pb, ts);
|
|
|
|
switch (pb) {
|
|
case ISO_START:
|
|
case ISO_SINGLE:
|
|
if (conn->rx_len) {
|
|
BT_ERR("Unexpected start frame (len %d)", skb->len);
|
|
kfree_skb(conn->rx_skb);
|
|
conn->rx_skb = NULL;
|
|
conn->rx_len = 0;
|
|
}
|
|
|
|
if (ts) {
|
|
/* TODO: add timestamp to the packet? */
|
|
hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE);
|
|
if (!hdr) {
|
|
BT_ERR("Frame is too short (len %d)", skb->len);
|
|
goto drop;
|
|
}
|
|
|
|
} else {
|
|
hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE);
|
|
if (!hdr) {
|
|
BT_ERR("Frame is too short (len %d)", skb->len);
|
|
goto drop;
|
|
}
|
|
}
|
|
|
|
len = __le16_to_cpu(hdr->slen);
|
|
flags = hci_iso_data_flags(len);
|
|
len = hci_iso_data_len(len);
|
|
|
|
BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x", len,
|
|
skb->len, flags);
|
|
|
|
if (len == skb->len) {
|
|
/* Complete frame received */
|
|
iso_recv_frame(conn, skb);
|
|
return;
|
|
}
|
|
|
|
if (pb == ISO_SINGLE) {
|
|
BT_ERR("Frame malformed (len %d, expected len %d)",
|
|
skb->len, len);
|
|
goto drop;
|
|
}
|
|
|
|
if (skb->len > len) {
|
|
BT_ERR("Frame is too long (len %d, expected len %d)",
|
|
skb->len, len);
|
|
goto drop;
|
|
}
|
|
|
|
/* Allocate skb for the complete frame (with header) */
|
|
conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL);
|
|
if (!conn->rx_skb)
|
|
goto drop;
|
|
|
|
skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
|
|
skb->len);
|
|
conn->rx_len = len - skb->len;
|
|
break;
|
|
|
|
case ISO_CONT:
|
|
BT_DBG("Cont: frag len %d (expecting %d)", skb->len,
|
|
conn->rx_len);
|
|
|
|
if (!conn->rx_len) {
|
|
BT_ERR("Unexpected continuation frame (len %d)",
|
|
skb->len);
|
|
goto drop;
|
|
}
|
|
|
|
if (skb->len > conn->rx_len) {
|
|
BT_ERR("Fragment is too long (len %d, expected %d)",
|
|
skb->len, conn->rx_len);
|
|
kfree_skb(conn->rx_skb);
|
|
conn->rx_skb = NULL;
|
|
conn->rx_len = 0;
|
|
goto drop;
|
|
}
|
|
|
|
skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
|
|
skb->len);
|
|
conn->rx_len -= skb->len;
|
|
return;
|
|
|
|
case ISO_END:
|
|
skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
|
|
skb->len);
|
|
conn->rx_len -= skb->len;
|
|
|
|
if (!conn->rx_len) {
|
|
struct sk_buff *rx_skb = conn->rx_skb;
|
|
|
|
/* Complete frame received. iso_recv_frame
|
|
* takes ownership of the skb so set the global
|
|
* rx_skb pointer to NULL first.
|
|
*/
|
|
conn->rx_skb = NULL;
|
|
iso_recv_frame(conn, rx_skb);
|
|
}
|
|
break;
|
|
}
|
|
|
|
drop:
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
static struct hci_cb iso_cb = {
|
|
.name = "ISO",
|
|
.connect_cfm = iso_connect_cfm,
|
|
.disconn_cfm = iso_disconn_cfm,
|
|
};
|
|
|
|
static int iso_debugfs_show(struct seq_file *f, void *p)
|
|
{
|
|
struct sock *sk;
|
|
|
|
read_lock(&iso_sk_list.lock);
|
|
|
|
sk_for_each(sk, &iso_sk_list.head) {
|
|
seq_printf(f, "%pMR %pMR %d\n", &iso_pi(sk)->src,
|
|
&iso_pi(sk)->dst, sk->sk_state);
|
|
}
|
|
|
|
read_unlock(&iso_sk_list.lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_SHOW_ATTRIBUTE(iso_debugfs);
|
|
|
|
static struct dentry *iso_debugfs;
|
|
|
|
static const struct proto_ops iso_sock_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.release = iso_sock_release,
|
|
.bind = iso_sock_bind,
|
|
.connect = iso_sock_connect,
|
|
.listen = iso_sock_listen,
|
|
.accept = iso_sock_accept,
|
|
.getname = iso_sock_getname,
|
|
.sendmsg = iso_sock_sendmsg,
|
|
.recvmsg = iso_sock_recvmsg,
|
|
.poll = bt_sock_poll,
|
|
.ioctl = bt_sock_ioctl,
|
|
.mmap = sock_no_mmap,
|
|
.socketpair = sock_no_socketpair,
|
|
.shutdown = iso_sock_shutdown,
|
|
.setsockopt = iso_sock_setsockopt,
|
|
.getsockopt = iso_sock_getsockopt
|
|
};
|
|
|
|
static const struct net_proto_family iso_sock_family_ops = {
|
|
.family = PF_BLUETOOTH,
|
|
.owner = THIS_MODULE,
|
|
.create = iso_sock_create,
|
|
};
|
|
|
|
static bool iso_inited;
|
|
|
|
bool iso_enabled(void)
|
|
{
|
|
return iso_inited;
|
|
}
|
|
|
|
int iso_init(void)
|
|
{
|
|
int err;
|
|
|
|
BUILD_BUG_ON(sizeof(struct sockaddr_iso) > sizeof(struct sockaddr));
|
|
|
|
if (iso_inited)
|
|
return -EALREADY;
|
|
|
|
err = proto_register(&iso_proto, 0);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
err = bt_sock_register(BTPROTO_ISO, &iso_sock_family_ops);
|
|
if (err < 0) {
|
|
BT_ERR("ISO socket registration failed");
|
|
goto error;
|
|
}
|
|
|
|
err = bt_procfs_init(&init_net, "iso", &iso_sk_list, NULL);
|
|
if (err < 0) {
|
|
BT_ERR("Failed to create ISO proc file");
|
|
bt_sock_unregister(BTPROTO_ISO);
|
|
goto error;
|
|
}
|
|
|
|
BT_INFO("ISO socket layer initialized");
|
|
|
|
hci_register_cb(&iso_cb);
|
|
|
|
if (IS_ERR_OR_NULL(bt_debugfs))
|
|
return 0;
|
|
|
|
if (!iso_debugfs) {
|
|
iso_debugfs = debugfs_create_file("iso", 0444, bt_debugfs,
|
|
NULL, &iso_debugfs_fops);
|
|
}
|
|
|
|
iso_inited = true;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
proto_unregister(&iso_proto);
|
|
return err;
|
|
}
|
|
|
|
int iso_exit(void)
|
|
{
|
|
if (!iso_inited)
|
|
return -EALREADY;
|
|
|
|
bt_procfs_cleanup(&init_net, "iso");
|
|
|
|
debugfs_remove(iso_debugfs);
|
|
iso_debugfs = NULL;
|
|
|
|
hci_unregister_cb(&iso_cb);
|
|
|
|
bt_sock_unregister(BTPROTO_ISO);
|
|
|
|
proto_unregister(&iso_proto);
|
|
|
|
iso_inited = false;
|
|
|
|
return 0;
|
|
}
|