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Bluetooth: ISO: Add broadcast support
This adds broadcast support for BTPROTO_ISO by extending the sockaddr_iso with a new struct sockaddr_iso_bc where the socket user can set the broadcast address when receiving, the SID and the BIS indexes it wants to synchronize. When using BTPROTO_ISO for broadcast the roles are: Broadcaster -> uses connect with address set to BDADDR_ANY: > tools/isotest -s 00:00:00:00:00:00 Broadcast Receiver -> uses listen with address set to broadcaster: > tools/isotest -d 00:AA:01:00:00:00 Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz
parent
eca0ae4aea
commit
f764a6c2c1
3 changed files with 371 additions and 35 deletions
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@ -220,6 +220,8 @@ struct bt_codecs {
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#define BT_CODEC_TRANSPARENT 0x03
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#define BT_CODEC_MSBC 0x05
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#define BT_ISO_BASE 20
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__printf(1, 2)
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void bt_info(const char *fmt, ...);
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__printf(1, 2)
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@ -10,12 +10,23 @@
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/* ISO defaults */
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#define ISO_DEFAULT_MTU 251
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#define ISO_MAX_NUM_BIS 0x1f
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/* ISO socket broadcast address */
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struct sockaddr_iso_bc {
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bdaddr_t bc_bdaddr;
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__u8 bc_bdaddr_type;
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__u8 bc_sid;
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__u8 bc_num_bis;
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__u8 bc_bis[ISO_MAX_NUM_BIS];
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};
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/* ISO socket address */
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struct sockaddr_iso {
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sa_family_t iso_family;
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bdaddr_t iso_bdaddr;
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__u8 iso_bdaddr_type;
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struct sockaddr_iso_bc iso_bc[];
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};
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#endif /* __ISO_H */
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@ -50,8 +50,14 @@ struct iso_pinfo {
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__u8 src_type;
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bdaddr_t dst;
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__u8 dst_type;
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__u8 bc_sid;
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__u8 bc_num_bis;
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__u8 bc_bis[ISO_MAX_NUM_BIS];
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__u16 sync_handle;
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__u32 flags;
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struct bt_iso_qos qos;
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__u8 base_len;
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__u8 base[HCI_MAX_PER_AD_LENGTH];
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struct iso_conn *conn;
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};
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@ -130,6 +136,7 @@ static struct iso_conn *iso_conn_add(struct hci_conn *hcon)
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static void iso_chan_del(struct sock *sk, int err)
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{
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struct iso_conn *conn;
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struct sock *parent;
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conn = iso_pi(sk)->conn;
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@ -147,7 +154,14 @@ static void iso_chan_del(struct sock *sk, int err)
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sk->sk_state = BT_CLOSED;
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sk->sk_err = err;
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parent = bt_sk(sk)->parent;
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if (parent) {
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bt_accept_unlink(sk);
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parent->sk_data_ready(parent);
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} else {
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sk->sk_state_change(sk);
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}
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sock_set_flag(sk, SOCK_ZAPPED);
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}
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@ -218,7 +232,70 @@ static int iso_chan_add(struct iso_conn *conn, struct sock *sk,
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return err;
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}
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static int iso_connect(struct sock *sk)
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static int iso_connect_bis(struct sock *sk)
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{
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struct iso_conn *conn;
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struct hci_conn *hcon;
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struct hci_dev *hdev;
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int err;
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BT_DBG("%pMR", &iso_pi(sk)->src);
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hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
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iso_pi(sk)->src_type);
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if (!hdev)
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return -EHOSTUNREACH;
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hci_dev_lock(hdev);
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if (!bis_capable(hdev)) {
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err = -EOPNOTSUPP;
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goto done;
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}
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/* Fail if out PHYs are marked as disabled */
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if (!iso_pi(sk)->qos.out.phy) {
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err = -EINVAL;
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goto done;
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}
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hcon = hci_connect_bis(hdev, &iso_pi(sk)->dst, iso_pi(sk)->dst_type,
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&iso_pi(sk)->qos, iso_pi(sk)->base_len,
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iso_pi(sk)->base);
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if (IS_ERR(hcon)) {
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err = PTR_ERR(hcon);
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goto done;
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}
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conn = iso_conn_add(hcon);
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if (!conn) {
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hci_conn_drop(hcon);
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err = -ENOMEM;
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goto done;
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}
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/* Update source addr of the socket */
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bacpy(&iso_pi(sk)->src, &hcon->src);
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err = iso_chan_add(conn, sk, NULL);
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if (err)
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goto done;
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if (hcon->state == BT_CONNECTED) {
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iso_sock_clear_timer(sk);
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sk->sk_state = BT_CONNECTED;
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} else {
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sk->sk_state = BT_CONNECT;
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iso_sock_set_timer(sk, sk->sk_sndtimeo);
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}
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done:
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hci_dev_unlock(hdev);
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hci_dev_put(hdev);
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return err;
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}
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static int iso_connect_cis(struct sock *sk)
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{
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struct iso_conn *conn;
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struct hci_conn *hcon;
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@ -359,10 +436,39 @@ static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *ba)
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return NULL;
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}
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/* Find socket listening on source bdaddr.
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static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc,
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__u8 sid)
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{
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struct sock *sk;
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sk_for_each(sk, &iso_sk_list.head) {
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if (sk->sk_state != BT_LISTEN)
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continue;
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if (bacmp(&iso_pi(sk)->src, ba))
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continue;
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if (bacmp(&iso_pi(sk)->dst, bc))
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continue;
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if (iso_pi(sk)->bc_sid == sid)
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return sk;
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}
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return NULL;
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}
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typedef bool (*iso_sock_match_t)(struct sock *sk, void *data);
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/* Find socket listening:
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* source bdaddr (Unicast)
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* destination bdaddr (Broadcast only)
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* match func - pass NULL to ignore
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* match func data - pass -1 to ignore
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* Returns closest match.
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*/
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static struct sock *iso_get_sock_listen(bdaddr_t *src)
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static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst,
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iso_sock_match_t match, void *data)
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{
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struct sock *sk = NULL, *sk1 = NULL;
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@ -372,6 +478,14 @@ static struct sock *iso_get_sock_listen(bdaddr_t *src)
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if (sk->sk_state != BT_LISTEN)
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continue;
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/* Match Broadcast destination */
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if (bacmp(dst, BDADDR_ANY) && bacmp(&iso_pi(sk)->dst, dst))
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continue;
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/* Use Match function if provided */
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if (match && !match(sk, data))
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continue;
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/* Exact match. */
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if (!bacmp(&iso_pi(sk)->src, src))
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break;
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@ -587,6 +701,38 @@ static int iso_sock_create(struct net *net, struct socket *sock, int protocol,
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return 0;
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}
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static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr,
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int addr_len)
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{
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struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
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struct sock *sk = sock->sk;
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int i;
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BT_DBG("sk %p bc_sid %u bc_num_bis %u", sk, sa->iso_bc->bc_sid,
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sa->iso_bc->bc_num_bis);
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if (addr_len > sizeof(*sa) + sizeof(*sa->iso_bc) ||
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sa->iso_bc->bc_num_bis < 0x01 || sa->iso_bc->bc_num_bis > 0x1f)
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return -EINVAL;
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bacpy(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr);
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iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type;
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iso_pi(sk)->sync_handle = -1;
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iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid;
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iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
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for (i = 0; i < iso_pi(sk)->bc_num_bis; i++) {
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if (sa->iso_bc->bc_bis[i] < 0x01 ||
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sa->iso_bc->bc_bis[i] > 0x1f)
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return -EINVAL;
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memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
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iso_pi(sk)->bc_num_bis);
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}
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return 0;
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}
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static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
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int addr_len)
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{
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@ -621,6 +767,13 @@ static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
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bacpy(&iso_pi(sk)->src, &sa->iso_bdaddr);
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iso_pi(sk)->src_type = sa->iso_bdaddr_type;
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/* Check for Broadcast address */
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if (addr_len > sizeof(*sa)) {
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err = iso_sock_bind_bc(sock, addr, addr_len);
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if (err)
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goto done;
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}
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sk->sk_state = BT_BOUND;
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done:
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@ -656,7 +809,11 @@ static int iso_sock_connect(struct socket *sock, struct sockaddr *addr,
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bacpy(&iso_pi(sk)->dst, &sa->iso_bdaddr);
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iso_pi(sk)->dst_type = sa->iso_bdaddr_type;
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err = iso_connect(sk);
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if (bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
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err = iso_connect_cis(sk);
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else
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err = iso_connect_bis(sk);
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if (err)
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goto done;
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@ -670,10 +827,59 @@ static int iso_sock_connect(struct socket *sock, struct sockaddr *addr,
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return err;
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}
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static int iso_listen_bis(struct sock *sk)
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{
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struct hci_dev *hdev;
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int err = 0;
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BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src,
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&iso_pi(sk)->dst, iso_pi(sk)->bc_sid);
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write_lock(&iso_sk_list.lock);
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if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst,
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iso_pi(sk)->bc_sid))
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err = -EADDRINUSE;
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write_unlock(&iso_sk_list.lock);
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if (err)
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return err;
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hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
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iso_pi(sk)->src_type);
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if (!hdev)
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return -EHOSTUNREACH;
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hci_dev_lock(hdev);
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err = hci_pa_create_sync(hdev, &iso_pi(sk)->dst, iso_pi(sk)->dst_type,
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iso_pi(sk)->bc_sid);
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hci_dev_unlock(hdev);
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return err;
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}
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static int iso_listen_cis(struct sock *sk)
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{
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int err = 0;
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BT_DBG("%pMR", &iso_pi(sk)->src);
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write_lock(&iso_sk_list.lock);
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if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src))
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err = -EADDRINUSE;
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write_unlock(&iso_sk_list.lock);
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return err;
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}
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static int iso_sock_listen(struct socket *sock, int backlog)
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{
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struct sock *sk = sock->sk;
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bdaddr_t *src = &iso_pi(sk)->src;
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int err = 0;
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BT_DBG("sk %p backlog %d", sk, backlog);
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@ -690,21 +896,19 @@ static int iso_sock_listen(struct socket *sock, int backlog)
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goto done;
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}
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write_lock(&iso_sk_list.lock);
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if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
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err = iso_listen_cis(sk);
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else
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err = iso_listen_bis(sk);
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if (__iso_get_sock_listen_by_addr(src)) {
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err = -EADDRINUSE;
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goto unlock;
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}
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if (err)
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goto done;
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sk->sk_max_ack_backlog = backlog;
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sk->sk_ack_backlog = 0;
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sk->sk_state = BT_LISTEN;
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unlock:
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write_unlock(&iso_sk_list.lock);
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done:
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release_sock(sk);
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return err;
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@ -886,7 +1090,7 @@ static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,
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release_sock(sk);
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return 0;
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case BT_CONNECT:
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err = iso_connect(sk);
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err = iso_connect_cis(sk);
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release_sock(sk);
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return err;
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}
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@ -917,10 +1121,6 @@ static bool check_io_qos(struct bt_iso_io_qos *qos)
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static bool check_qos(struct bt_iso_qos *qos)
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{
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/* CIS shall not be set */
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if (qos->cis != BT_ISO_QOS_CIS_UNSET)
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return false;
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if (qos->sca > 0x07)
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return false;
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@ -996,6 +1196,29 @@ static int iso_sock_setsockopt(struct socket *sock, int level, int optname,
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break;
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case BT_ISO_BASE:
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if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
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sk->sk_state != BT_CONNECT2) {
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err = -EINVAL;
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break;
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}
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if (optlen > sizeof(iso_pi(sk)->base)) {
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err = -EOVERFLOW;
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break;
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}
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len = min_t(unsigned int, sizeof(iso_pi(sk)->base), optlen);
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if (copy_from_sockptr(iso_pi(sk)->base, optval, len)) {
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err = -EFAULT;
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break;
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}
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iso_pi(sk)->base_len = len;
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break;
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default:
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err = -ENOPROTOOPT;
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break;
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@ -1011,6 +1234,8 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
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struct sock *sk = sock->sk;
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int len, err = 0;
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struct bt_iso_qos qos;
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u8 base_len;
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u8 *base;
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BT_DBG("sk %p", sk);
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@ -1044,6 +1269,21 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
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break;
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case BT_ISO_BASE:
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if (sk->sk_state == BT_CONNECTED) {
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base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len;
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base = iso_pi(sk)->conn->hcon->le_per_adv_data;
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} else {
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base_len = iso_pi(sk)->base_len;
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base = iso_pi(sk)->base;
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}
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len = min_t(unsigned int, len, base_len);
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if (copy_to_user(optval, base, len))
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err = -EFAULT;
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break;
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default:
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err = -ENOPROTOOPT;
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break;
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@ -1126,10 +1366,18 @@ struct iso_list_data {
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int count;
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};
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static bool iso_match_big(struct sock *sk, void *data)
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{
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struct hci_evt_le_big_sync_estabilished *ev = data;
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return ev->handle == iso_pi(sk)->qos.big;
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}
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static void iso_conn_ready(struct iso_conn *conn)
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{
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struct sock *parent;
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struct sock *sk = conn->sk;
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struct hci_ev_le_big_sync_estabilished *ev;
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BT_DBG("conn %p", conn);
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@ -1143,7 +1391,16 @@ static void iso_conn_ready(struct iso_conn *conn)
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return;
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}
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parent = iso_get_sock_listen(&conn->hcon->src);
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ev = hci_recv_event_data(conn->hcon->hdev,
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HCI_EVT_LE_BIG_SYNC_ESTABILISHED);
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if (ev)
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parent = iso_get_sock_listen(&conn->hcon->src,
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&conn->hcon->dst,
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iso_match_big, ev);
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else
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parent = iso_get_sock_listen(&conn->hcon->src,
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BDADDR_ANY, NULL, NULL);
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if (!parent) {
|
||||
iso_conn_unlock(conn);
|
||||
return;
|
||||
|
|
@ -1163,6 +1420,17 @@ static void iso_conn_ready(struct iso_conn *conn)
|
|||
|
||||
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;
|
||||
|
||||
|
|
@ -1183,30 +1451,85 @@ static void iso_conn_ready(struct iso_conn *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_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr);
|
||||
bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
|
||||
|
||||
/* Find listening sockets */
|
||||
read_lock(&iso_sk_list.lock);
|
||||
sk_for_each(sk, &iso_sk_list.head) {
|
||||
if (sk->sk_state != BT_LISTEN)
|
||||
continue;
|
||||
/* 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;
|
||||
|
||||
if (!bacmp(&iso_pi(sk)->src, &hdev->bdaddr) ||
|
||||
!bacmp(&iso_pi(sk)->src, BDADDR_ANY)) {
|
||||
lm |= HCI_LM_ACCEPT;
|
||||
|
||||
if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
|
||||
*flags |= HCI_PROTO_DEFER;
|
||||
break;
|
||||
}
|
||||
}
|
||||
read_unlock(&iso_sk_list.lock);
|
||||
|
||||
return lm;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue