1 // SPDX-License-Identifier: GPL-2.0
3 * BlueZ - Bluetooth protocol stack for Linux
5 * Copyright (C) 2022 Intel Corporation
8 #include <linux/module.h>
9 #include <linux/debugfs.h>
10 #include <linux/seq_file.h>
11 #include <linux/sched/signal.h>
13 #include <net/bluetooth/bluetooth.h>
14 #include <net/bluetooth/hci_core.h>
15 #include <net/bluetooth/iso.h>
17 static const struct proto_ops iso_sock_ops;
19 static struct bt_sock_list iso_sk_list = {
20 .lock = __RW_LOCK_UNLOCKED(iso_sk_list.lock)
23 /* ---- ISO connections ---- */
25 struct hci_conn *hcon;
27 /* @lock: spinlock protecting changes to iso_conn fields */
31 struct delayed_work timeout_work;
33 struct sk_buff *rx_skb;
38 #define iso_conn_lock(c) spin_lock(&(c)->lock)
39 #define iso_conn_unlock(c) spin_unlock(&(c)->lock)
41 static void iso_sock_close(struct sock *sk);
42 static void iso_sock_kill(struct sock *sk);
44 /* ----- ISO socket info ----- */
45 #define iso_pi(sk) ((struct iso_pinfo *)sk)
55 __u8 bc_bis[ISO_MAX_NUM_BIS];
58 struct bt_iso_qos qos;
60 __u8 base[HCI_MAX_PER_AD_LENGTH];
61 struct iso_conn *conn;
64 /* ---- ISO timers ---- */
65 #define ISO_CONN_TIMEOUT (HZ * 40)
66 #define ISO_DISCONN_TIMEOUT (HZ * 2)
68 static void iso_sock_timeout(struct work_struct *work)
70 struct iso_conn *conn = container_of(work, struct iso_conn,
78 iso_conn_unlock(conn);
83 BT_DBG("sock %p state %d", sk, sk->sk_state);
86 sk->sk_err = ETIMEDOUT;
87 sk->sk_state_change(sk);
92 static void iso_sock_set_timer(struct sock *sk, long timeout)
94 if (!iso_pi(sk)->conn)
97 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
98 cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
99 schedule_delayed_work(&iso_pi(sk)->conn->timeout_work, timeout);
102 static void iso_sock_clear_timer(struct sock *sk)
104 if (!iso_pi(sk)->conn)
107 BT_DBG("sock %p state %d", sk, sk->sk_state);
108 cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
111 /* ---- ISO connections ---- */
112 static struct iso_conn *iso_conn_add(struct hci_conn *hcon)
114 struct iso_conn *conn = hcon->iso_data;
119 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
123 spin_lock_init(&conn->lock);
124 INIT_DELAYED_WORK(&conn->timeout_work, iso_sock_timeout);
126 hcon->iso_data = conn;
130 BT_DBG("hcon %p conn %p", hcon, conn);
135 /* Delete channel. Must be called on the locked socket. */
136 static void iso_chan_del(struct sock *sk, int err)
138 struct iso_conn *conn;
141 conn = iso_pi(sk)->conn;
143 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
148 iso_pi(sk)->conn = NULL;
149 iso_conn_unlock(conn);
152 hci_conn_drop(conn->hcon);
155 sk->sk_state = BT_CLOSED;
158 parent = bt_sk(sk)->parent;
160 bt_accept_unlink(sk);
161 parent->sk_data_ready(parent);
163 sk->sk_state_change(sk);
166 sock_set_flag(sk, SOCK_ZAPPED);
169 static void iso_conn_del(struct hci_conn *hcon, int err)
171 struct iso_conn *conn = hcon->iso_data;
177 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
184 iso_conn_unlock(conn);
188 iso_sock_clear_timer(sk);
189 iso_chan_del(sk, err);
194 /* Ensure no more work items will run before freeing conn. */
195 cancel_delayed_work_sync(&conn->timeout_work);
197 hcon->iso_data = NULL;
201 static int __iso_chan_add(struct iso_conn *conn, struct sock *sk,
204 BT_DBG("conn %p", conn);
206 if (iso_pi(sk)->conn == conn && conn->sk == sk)
210 BT_ERR("conn->sk already set");
214 iso_pi(sk)->conn = conn;
218 bt_accept_enqueue(parent, sk, true);
223 static int iso_chan_add(struct iso_conn *conn, struct sock *sk,
229 err = __iso_chan_add(conn, sk, parent);
230 iso_conn_unlock(conn);
235 static int iso_connect_bis(struct sock *sk)
237 struct iso_conn *conn;
238 struct hci_conn *hcon;
239 struct hci_dev *hdev;
242 BT_DBG("%pMR", &iso_pi(sk)->src);
244 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
245 iso_pi(sk)->src_type);
247 return -EHOSTUNREACH;
251 if (!bis_capable(hdev)) {
256 /* Fail if out PHYs are marked as disabled */
257 if (!iso_pi(sk)->qos.out.phy) {
262 hcon = hci_connect_bis(hdev, &iso_pi(sk)->dst, iso_pi(sk)->dst_type,
263 &iso_pi(sk)->qos, iso_pi(sk)->base_len,
270 conn = iso_conn_add(hcon);
277 /* Update source addr of the socket */
278 bacpy(&iso_pi(sk)->src, &hcon->src);
280 err = iso_chan_add(conn, sk, NULL);
284 if (hcon->state == BT_CONNECTED) {
285 iso_sock_clear_timer(sk);
286 sk->sk_state = BT_CONNECTED;
288 sk->sk_state = BT_CONNECT;
289 iso_sock_set_timer(sk, sk->sk_sndtimeo);
293 hci_dev_unlock(hdev);
298 static int iso_connect_cis(struct sock *sk)
300 struct iso_conn *conn;
301 struct hci_conn *hcon;
302 struct hci_dev *hdev;
305 BT_DBG("%pMR -> %pMR", &iso_pi(sk)->src, &iso_pi(sk)->dst);
307 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
308 iso_pi(sk)->src_type);
310 return -EHOSTUNREACH;
314 if (!cis_central_capable(hdev)) {
319 /* Fail if either PHYs are marked as disabled */
320 if (!iso_pi(sk)->qos.in.phy && !iso_pi(sk)->qos.out.phy) {
325 /* Just bind if DEFER_SETUP has been set */
326 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
327 hcon = hci_bind_cis(hdev, &iso_pi(sk)->dst,
328 iso_pi(sk)->dst_type, &iso_pi(sk)->qos);
334 hcon = hci_connect_cis(hdev, &iso_pi(sk)->dst,
335 iso_pi(sk)->dst_type, &iso_pi(sk)->qos);
342 conn = iso_conn_add(hcon);
349 /* Update source addr of the socket */
350 bacpy(&iso_pi(sk)->src, &hcon->src);
352 err = iso_chan_add(conn, sk, NULL);
356 if (hcon->state == BT_CONNECTED) {
357 iso_sock_clear_timer(sk);
358 sk->sk_state = BT_CONNECTED;
359 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
360 iso_sock_clear_timer(sk);
361 sk->sk_state = BT_CONNECT;
363 sk->sk_state = BT_CONNECT;
364 iso_sock_set_timer(sk, sk->sk_sndtimeo);
368 hci_dev_unlock(hdev);
373 static int iso_send_frame(struct sock *sk, struct sk_buff *skb)
375 struct iso_conn *conn = iso_pi(sk)->conn;
376 struct hci_iso_data_hdr *hdr;
379 BT_DBG("sk %p len %d", sk, skb->len);
381 if (skb->len > iso_pi(sk)->qos.out.sdu)
386 /* Push ISO data header */
387 hdr = skb_push(skb, HCI_ISO_DATA_HDR_SIZE);
388 hdr->sn = cpu_to_le16(conn->tx_sn++);
389 hdr->slen = cpu_to_le16(hci_iso_data_len_pack(len,
390 HCI_ISO_STATUS_VALID));
392 if (sk->sk_state == BT_CONNECTED)
393 hci_send_iso(conn->hcon, skb);
400 static void iso_recv_frame(struct iso_conn *conn, struct sk_buff *skb)
406 iso_conn_unlock(conn);
411 BT_DBG("sk %p len %d", sk, skb->len);
413 if (sk->sk_state != BT_CONNECTED)
416 if (!sock_queue_rcv_skb(sk, skb))
423 /* -------- Socket interface ---------- */
424 static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *ba)
428 sk_for_each(sk, &iso_sk_list.head) {
429 if (sk->sk_state != BT_LISTEN)
432 if (!bacmp(&iso_pi(sk)->src, ba))
439 static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc,
444 sk_for_each(sk, &iso_sk_list.head) {
445 if (sk->sk_state != BT_LISTEN)
448 if (bacmp(&iso_pi(sk)->src, ba))
451 if (bacmp(&iso_pi(sk)->dst, bc))
454 if (iso_pi(sk)->bc_sid == sid)
461 typedef bool (*iso_sock_match_t)(struct sock *sk, void *data);
463 /* Find socket listening:
464 * source bdaddr (Unicast)
465 * destination bdaddr (Broadcast only)
466 * match func - pass NULL to ignore
467 * match func data - pass -1 to ignore
468 * Returns closest match.
470 static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst,
471 iso_sock_match_t match, void *data)
473 struct sock *sk = NULL, *sk1 = NULL;
475 read_lock(&iso_sk_list.lock);
477 sk_for_each(sk, &iso_sk_list.head) {
478 if (sk->sk_state != BT_LISTEN)
481 /* Match Broadcast destination */
482 if (bacmp(dst, BDADDR_ANY) && bacmp(&iso_pi(sk)->dst, dst))
485 /* Use Match function if provided */
486 if (match && !match(sk, data))
490 if (!bacmp(&iso_pi(sk)->src, src))
494 if (!bacmp(&iso_pi(sk)->src, BDADDR_ANY))
498 read_unlock(&iso_sk_list.lock);
500 return sk ? sk : sk1;
503 static void iso_sock_destruct(struct sock *sk)
507 skb_queue_purge(&sk->sk_receive_queue);
508 skb_queue_purge(&sk->sk_write_queue);
511 static void iso_sock_cleanup_listen(struct sock *parent)
515 BT_DBG("parent %p", parent);
517 /* Close not yet accepted channels */
518 while ((sk = bt_accept_dequeue(parent, NULL))) {
523 parent->sk_state = BT_CLOSED;
524 sock_set_flag(parent, SOCK_ZAPPED);
527 /* Kill socket (only if zapped and orphan)
528 * Must be called on unlocked socket.
530 static void iso_sock_kill(struct sock *sk)
532 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket ||
533 sock_flag(sk, SOCK_DEAD))
536 BT_DBG("sk %p state %d", sk, sk->sk_state);
538 /* Kill poor orphan */
539 bt_sock_unlink(&iso_sk_list, sk);
540 sock_set_flag(sk, SOCK_DEAD);
544 static void iso_conn_defer_reject(struct hci_conn *conn)
546 struct hci_cp_le_reject_cis cp;
548 BT_DBG("conn %p", conn);
550 memset(&cp, 0, sizeof(cp));
551 cp.handle = cpu_to_le16(conn->handle);
552 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
553 hci_send_cmd(conn->hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
556 static void __iso_sock_close(struct sock *sk)
558 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
560 switch (sk->sk_state) {
562 iso_sock_cleanup_listen(sk);
567 if (iso_pi(sk)->conn->hcon) {
568 sk->sk_state = BT_DISCONN;
569 iso_sock_set_timer(sk, ISO_DISCONN_TIMEOUT);
570 iso_conn_lock(iso_pi(sk)->conn);
571 hci_conn_drop(iso_pi(sk)->conn->hcon);
572 iso_pi(sk)->conn->hcon = NULL;
573 iso_conn_unlock(iso_pi(sk)->conn);
575 iso_chan_del(sk, ECONNRESET);
580 if (iso_pi(sk)->conn->hcon)
581 iso_conn_defer_reject(iso_pi(sk)->conn->hcon);
582 iso_chan_del(sk, ECONNRESET);
585 /* In case of DEFER_SETUP the hcon would be bound to CIG which
586 * needs to be removed so just call hci_conn_del so the cleanup
587 * callback do what is needed.
589 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags) &&
590 iso_pi(sk)->conn->hcon) {
591 hci_conn_del(iso_pi(sk)->conn->hcon);
592 iso_pi(sk)->conn->hcon = NULL;
595 iso_chan_del(sk, ECONNRESET);
598 iso_chan_del(sk, ECONNRESET);
602 sock_set_flag(sk, SOCK_ZAPPED);
607 /* Must be called on unlocked socket. */
608 static void iso_sock_close(struct sock *sk)
610 iso_sock_clear_timer(sk);
612 __iso_sock_close(sk);
617 static void iso_sock_init(struct sock *sk, struct sock *parent)
622 sk->sk_type = parent->sk_type;
623 bt_sk(sk)->flags = bt_sk(parent)->flags;
624 security_sk_clone(parent, sk);
628 static struct proto iso_proto = {
630 .owner = THIS_MODULE,
631 .obj_size = sizeof(struct iso_pinfo)
634 #define DEFAULT_IO_QOS \
636 .interval = 10000u, \
639 .phy = BT_ISO_PHY_2M, \
643 static struct bt_iso_qos default_qos = {
644 .cig = BT_ISO_QOS_CIG_UNSET,
645 .cis = BT_ISO_QOS_CIS_UNSET,
649 .in = DEFAULT_IO_QOS,
650 .out = DEFAULT_IO_QOS,
653 static struct sock *iso_sock_alloc(struct net *net, struct socket *sock,
654 int proto, gfp_t prio, int kern)
658 sk = sk_alloc(net, PF_BLUETOOTH, prio, &iso_proto, kern);
662 sock_init_data(sock, sk);
663 INIT_LIST_HEAD(&bt_sk(sk)->accept_q);
665 sk->sk_destruct = iso_sock_destruct;
666 sk->sk_sndtimeo = ISO_CONN_TIMEOUT;
668 sock_reset_flag(sk, SOCK_ZAPPED);
670 sk->sk_protocol = proto;
671 sk->sk_state = BT_OPEN;
673 /* Set address type as public as default src address is BDADDR_ANY */
674 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
676 iso_pi(sk)->qos = default_qos;
678 bt_sock_link(&iso_sk_list, sk);
682 static int iso_sock_create(struct net *net, struct socket *sock, int protocol,
687 BT_DBG("sock %p", sock);
689 sock->state = SS_UNCONNECTED;
691 if (sock->type != SOCK_SEQPACKET)
692 return -ESOCKTNOSUPPORT;
694 sock->ops = &iso_sock_ops;
696 sk = iso_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
700 iso_sock_init(sk, NULL);
704 static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr,
707 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
708 struct sock *sk = sock->sk;
711 BT_DBG("sk %p bc_sid %u bc_num_bis %u", sk, sa->iso_bc->bc_sid,
712 sa->iso_bc->bc_num_bis);
714 if (addr_len > sizeof(*sa) + sizeof(*sa->iso_bc) ||
715 sa->iso_bc->bc_num_bis < 0x01 || sa->iso_bc->bc_num_bis > 0x1f)
718 bacpy(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr);
719 iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type;
720 iso_pi(sk)->sync_handle = -1;
721 iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid;
722 iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
724 for (i = 0; i < iso_pi(sk)->bc_num_bis; i++) {
725 if (sa->iso_bc->bc_bis[i] < 0x01 ||
726 sa->iso_bc->bc_bis[i] > 0x1f)
729 memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
730 iso_pi(sk)->bc_num_bis);
736 static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
739 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
740 struct sock *sk = sock->sk;
743 BT_DBG("sk %p %pMR type %u", sk, &sa->iso_bdaddr, sa->iso_bdaddr_type);
745 if (!addr || addr_len < sizeof(struct sockaddr_iso) ||
746 addr->sa_family != AF_BLUETOOTH)
751 if (sk->sk_state != BT_OPEN) {
756 if (sk->sk_type != SOCK_SEQPACKET) {
761 /* Check if the address type is of LE type */
762 if (!bdaddr_type_is_le(sa->iso_bdaddr_type)) {
767 bacpy(&iso_pi(sk)->src, &sa->iso_bdaddr);
768 iso_pi(sk)->src_type = sa->iso_bdaddr_type;
770 /* Check for Broadcast address */
771 if (addr_len > sizeof(*sa)) {
772 err = iso_sock_bind_bc(sock, addr, addr_len);
777 sk->sk_state = BT_BOUND;
784 static int iso_sock_connect(struct socket *sock, struct sockaddr *addr,
787 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
788 struct sock *sk = sock->sk;
793 if (alen < sizeof(struct sockaddr_iso) ||
794 addr->sa_family != AF_BLUETOOTH)
797 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
800 if (sk->sk_type != SOCK_SEQPACKET)
803 /* Check if the address type is of LE type */
804 if (!bdaddr_type_is_le(sa->iso_bdaddr_type))
809 bacpy(&iso_pi(sk)->dst, &sa->iso_bdaddr);
810 iso_pi(sk)->dst_type = sa->iso_bdaddr_type;
812 if (bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
813 err = iso_connect_cis(sk);
815 err = iso_connect_bis(sk);
820 if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
821 err = bt_sock_wait_state(sk, BT_CONNECTED,
822 sock_sndtimeo(sk, flags & O_NONBLOCK));
830 static int iso_listen_bis(struct sock *sk)
832 struct hci_dev *hdev;
835 BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src,
836 &iso_pi(sk)->dst, iso_pi(sk)->bc_sid);
838 write_lock(&iso_sk_list.lock);
840 if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst,
844 write_unlock(&iso_sk_list.lock);
849 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
850 iso_pi(sk)->src_type);
852 return -EHOSTUNREACH;
856 err = hci_pa_create_sync(hdev, &iso_pi(sk)->dst, iso_pi(sk)->dst_type,
859 hci_dev_unlock(hdev);
864 static int iso_listen_cis(struct sock *sk)
868 BT_DBG("%pMR", &iso_pi(sk)->src);
870 write_lock(&iso_sk_list.lock);
872 if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src))
875 write_unlock(&iso_sk_list.lock);
880 static int iso_sock_listen(struct socket *sock, int backlog)
882 struct sock *sk = sock->sk;
885 BT_DBG("sk %p backlog %d", sk, backlog);
889 if (sk->sk_state != BT_BOUND) {
894 if (sk->sk_type != SOCK_SEQPACKET) {
899 if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
900 err = iso_listen_cis(sk);
902 err = iso_listen_bis(sk);
907 sk->sk_max_ack_backlog = backlog;
908 sk->sk_ack_backlog = 0;
910 sk->sk_state = BT_LISTEN;
917 static int iso_sock_accept(struct socket *sock, struct socket *newsock,
918 int flags, bool kern)
920 DEFINE_WAIT_FUNC(wait, woken_wake_function);
921 struct sock *sk = sock->sk, *ch;
927 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
929 BT_DBG("sk %p timeo %ld", sk, timeo);
931 /* Wait for an incoming connection. (wake-one). */
932 add_wait_queue_exclusive(sk_sleep(sk), &wait);
934 if (sk->sk_state != BT_LISTEN) {
939 ch = bt_accept_dequeue(sk, newsock);
948 if (signal_pending(current)) {
949 err = sock_intr_errno(timeo);
955 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
958 remove_wait_queue(sk_sleep(sk), &wait);
963 newsock->state = SS_CONNECTED;
965 BT_DBG("new socket %p", ch);
972 static int iso_sock_getname(struct socket *sock, struct sockaddr *addr,
975 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
976 struct sock *sk = sock->sk;
978 BT_DBG("sock %p, sk %p", sock, sk);
980 addr->sa_family = AF_BLUETOOTH;
983 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->dst);
984 sa->iso_bdaddr_type = iso_pi(sk)->dst_type;
986 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->src);
987 sa->iso_bdaddr_type = iso_pi(sk)->src_type;
990 return sizeof(struct sockaddr_iso);
993 static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
996 struct sock *sk = sock->sk;
997 struct iso_conn *conn = iso_pi(sk)->conn;
998 struct sk_buff *skb, **frag;
1001 BT_DBG("sock %p, sk %p", sock, sk);
1003 err = sock_error(sk);
1007 if (msg->msg_flags & MSG_OOB)
1010 if (sk->sk_state != BT_CONNECTED)
1013 skb = bt_skb_sendmsg(sk, msg, len, conn->hcon->hdev->iso_mtu,
1014 HCI_ISO_DATA_HDR_SIZE, 0);
1016 return PTR_ERR(skb);
1020 BT_DBG("skb %p len %d", sk, skb->len);
1022 /* Continuation fragments */
1023 frag = &skb_shinfo(skb)->frag_list;
1025 struct sk_buff *tmp;
1027 tmp = bt_skb_sendmsg(sk, msg, len, conn->hcon->hdev->iso_mtu,
1031 return PTR_ERR(tmp);
1038 skb->len += tmp->len;
1039 skb->data_len += tmp->len;
1041 BT_DBG("frag %p len %d", *frag, tmp->len);
1043 frag = &(*frag)->next;
1048 if (sk->sk_state == BT_CONNECTED)
1049 err = iso_send_frame(sk, skb);
1060 static void iso_conn_defer_accept(struct hci_conn *conn)
1062 struct hci_cp_le_accept_cis cp;
1063 struct hci_dev *hdev = conn->hdev;
1065 BT_DBG("conn %p", conn);
1067 conn->state = BT_CONFIG;
1069 cp.handle = cpu_to_le16(conn->handle);
1071 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
1074 static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1075 size_t len, int flags)
1077 struct sock *sk = sock->sk;
1078 struct iso_pinfo *pi = iso_pi(sk);
1081 BT_DBG("sk %p", sk);
1085 if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
1086 switch (sk->sk_state) {
1088 iso_conn_defer_accept(pi->conn->hcon);
1089 sk->sk_state = BT_CONFIG;
1093 err = iso_connect_cis(sk);
1101 return bt_sock_recvmsg(sock, msg, len, flags);
1104 static bool check_io_qos(struct bt_iso_io_qos *qos)
1106 /* If no PHY is enable SDU must be 0 */
1107 if (!qos->phy && qos->sdu)
1110 if (qos->interval && (qos->interval < 0xff || qos->interval > 0xfffff))
1113 if (qos->latency && (qos->latency < 0x05 || qos->latency > 0xfa0))
1116 if (qos->phy > BT_ISO_PHY_ANY)
1122 static bool check_qos(struct bt_iso_qos *qos)
1124 if (qos->sca > 0x07)
1127 if (qos->packing > 0x01)
1130 if (qos->framing > 0x01)
1133 if (!check_io_qos(&qos->in))
1136 if (!check_io_qos(&qos->out))
1142 static int iso_sock_setsockopt(struct socket *sock, int level, int optname,
1143 sockptr_t optval, unsigned int optlen)
1145 struct sock *sk = sock->sk;
1147 struct bt_iso_qos qos;
1150 BT_DBG("sk %p", sk);
1155 case BT_DEFER_SETUP:
1156 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
1161 if (copy_from_sockptr(&opt, optval, sizeof(u32))) {
1167 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
1169 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
1173 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
1174 sk->sk_state != BT_CONNECT2) {
1179 len = min_t(unsigned int, sizeof(qos), optlen);
1180 if (len != sizeof(qos))
1183 memset(&qos, 0, sizeof(qos));
1185 if (copy_from_sockptr(&qos, optval, len)) {
1190 if (!check_qos(&qos)) {
1195 iso_pi(sk)->qos = qos;
1200 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
1201 sk->sk_state != BT_CONNECT2) {
1206 if (optlen > sizeof(iso_pi(sk)->base)) {
1211 len = min_t(unsigned int, sizeof(iso_pi(sk)->base), optlen);
1213 if (copy_from_sockptr(iso_pi(sk)->base, optval, len)) {
1218 iso_pi(sk)->base_len = len;
1231 static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
1232 char __user *optval, int __user *optlen)
1234 struct sock *sk = sock->sk;
1236 struct bt_iso_qos qos;
1240 BT_DBG("sk %p", sk);
1242 if (get_user(len, optlen))
1248 case BT_DEFER_SETUP:
1249 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
1254 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
1255 (u32 __user *)optval))
1261 if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONNECT2)
1262 qos = iso_pi(sk)->conn->hcon->iso_qos;
1264 qos = iso_pi(sk)->qos;
1266 len = min_t(unsigned int, len, sizeof(qos));
1267 if (copy_to_user(optval, (char *)&qos, len))
1273 if (sk->sk_state == BT_CONNECTED) {
1274 base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len;
1275 base = iso_pi(sk)->conn->hcon->le_per_adv_data;
1277 base_len = iso_pi(sk)->base_len;
1278 base = iso_pi(sk)->base;
1281 len = min_t(unsigned int, len, base_len);
1282 if (copy_to_user(optval, base, len))
1296 static int iso_sock_shutdown(struct socket *sock, int how)
1298 struct sock *sk = sock->sk;
1301 BT_DBG("sock %p, sk %p", sock, sk);
1309 if (!sk->sk_shutdown) {
1310 sk->sk_shutdown = SHUTDOWN_MASK;
1311 iso_sock_clear_timer(sk);
1312 __iso_sock_close(sk);
1314 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1315 !(current->flags & PF_EXITING))
1316 err = bt_sock_wait_state(sk, BT_CLOSED,
1326 static int iso_sock_release(struct socket *sock)
1328 struct sock *sk = sock->sk;
1331 BT_DBG("sock %p, sk %p", sock, sk);
1338 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1339 !(current->flags & PF_EXITING)) {
1341 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1350 static void iso_sock_ready(struct sock *sk)
1352 BT_DBG("sk %p", sk);
1358 iso_sock_clear_timer(sk);
1359 sk->sk_state = BT_CONNECTED;
1360 sk->sk_state_change(sk);
1364 struct iso_list_data {
1365 struct hci_conn *hcon;
1369 static bool iso_match_big(struct sock *sk, void *data)
1371 struct hci_evt_le_big_sync_estabilished *ev = data;
1373 return ev->handle == iso_pi(sk)->qos.big;
1376 static void iso_conn_ready(struct iso_conn *conn)
1378 struct sock *parent;
1379 struct sock *sk = conn->sk;
1380 struct hci_ev_le_big_sync_estabilished *ev;
1382 BT_DBG("conn %p", conn);
1385 iso_sock_ready(conn->sk);
1387 iso_conn_lock(conn);
1390 iso_conn_unlock(conn);
1394 ev = hci_recv_event_data(conn->hcon->hdev,
1395 HCI_EVT_LE_BIG_SYNC_ESTABILISHED);
1397 parent = iso_get_sock_listen(&conn->hcon->src,
1401 parent = iso_get_sock_listen(&conn->hcon->src,
1402 BDADDR_ANY, NULL, NULL);
1405 iso_conn_unlock(conn);
1411 sk = iso_sock_alloc(sock_net(parent), NULL,
1412 BTPROTO_ISO, GFP_ATOMIC, 0);
1414 release_sock(parent);
1415 iso_conn_unlock(conn);
1419 iso_sock_init(sk, parent);
1421 bacpy(&iso_pi(sk)->src, &conn->hcon->src);
1422 iso_pi(sk)->src_type = conn->hcon->src_type;
1424 /* If hcon has no destination address (BDADDR_ANY) it means it
1425 * was created by HCI_EV_LE_BIG_SYNC_ESTABILISHED so we need to
1426 * initialize using the parent socket destination address.
1428 if (!bacmp(&conn->hcon->dst, BDADDR_ANY)) {
1429 bacpy(&conn->hcon->dst, &iso_pi(parent)->dst);
1430 conn->hcon->dst_type = iso_pi(parent)->dst_type;
1431 conn->hcon->sync_handle = iso_pi(parent)->sync_handle;
1434 bacpy(&iso_pi(sk)->dst, &conn->hcon->dst);
1435 iso_pi(sk)->dst_type = conn->hcon->dst_type;
1437 hci_conn_hold(conn->hcon);
1438 __iso_chan_add(conn, sk, parent);
1440 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1441 sk->sk_state = BT_CONNECT2;
1443 sk->sk_state = BT_CONNECTED;
1445 /* Wake up parent */
1446 parent->sk_data_ready(parent);
1448 release_sock(parent);
1450 iso_conn_unlock(conn);
1454 static bool iso_match_sid(struct sock *sk, void *data)
1456 struct hci_ev_le_pa_sync_established *ev = data;
1458 return ev->sid == iso_pi(sk)->bc_sid;
1461 static bool iso_match_sync_handle(struct sock *sk, void *data)
1463 struct hci_evt_le_big_info_adv_report *ev = data;
1465 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
1468 /* ----- ISO interface with lower layer (HCI) ----- */
1470 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1472 struct hci_ev_le_pa_sync_established *ev1;
1473 struct hci_evt_le_big_info_adv_report *ev2;
1477 bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
1479 /* Broadcast receiver requires handling of some events before it can
1480 * proceed to establishing a BIG sync:
1482 * 1. HCI_EV_LE_PA_SYNC_ESTABLISHED: The socket may specify a specific
1483 * SID to listen to and once sync is estabilished its handle needs to
1484 * be stored in iso_pi(sk)->sync_handle so it can be matched once
1485 * receiving the BIG Info.
1486 * 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a
1487 * a BIG Info it attempts to check if there any listening socket with
1488 * the same sync_handle and if it does then attempt to create a sync.
1490 ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED);
1492 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr, iso_match_sid,
1495 iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle);
1500 ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT);
1502 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1503 iso_match_sync_handle, ev2);
1507 if (ev2->num_bis < iso_pi(sk)->bc_num_bis)
1508 iso_pi(sk)->bc_num_bis = ev2->num_bis;
1510 err = hci_le_big_create_sync(hdev,
1512 iso_pi(sk)->sync_handle,
1513 iso_pi(sk)->bc_num_bis,
1514 iso_pi(sk)->bc_bis);
1516 bt_dev_err(hdev, "hci_le_big_create_sync: %d",
1522 sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL);
1529 lm |= HCI_LM_ACCEPT;
1531 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1532 *flags |= HCI_PROTO_DEFER;
1537 static void iso_connect_cfm(struct hci_conn *hcon, __u8 status)
1539 if (hcon->type != ISO_LINK) {
1540 if (hcon->type != LE_LINK)
1543 /* Check if LE link has failed */
1546 iso_conn_del(hcon->link, bt_to_errno(status));
1550 /* Create CIS if pending */
1551 hci_le_create_cis(hcon);
1555 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
1558 struct iso_conn *conn;
1560 conn = iso_conn_add(hcon);
1562 iso_conn_ready(conn);
1564 iso_conn_del(hcon, bt_to_errno(status));
1568 static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason)
1570 if (hcon->type != ISO_LINK)
1573 BT_DBG("hcon %p reason %d", hcon, reason);
1575 iso_conn_del(hcon, bt_to_errno(reason));
1578 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
1580 struct iso_conn *conn = hcon->iso_data;
1581 struct hci_iso_data_hdr *hdr;
1587 pb = hci_iso_flags_pb(flags);
1588 ts = hci_iso_flags_ts(flags);
1590 BT_DBG("conn %p len %d pb 0x%x ts 0x%x", conn, skb->len, pb, ts);
1596 BT_ERR("Unexpected start frame (len %d)", skb->len);
1597 kfree_skb(conn->rx_skb);
1598 conn->rx_skb = NULL;
1603 /* TODO: add timestamp to the packet? */
1604 hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE);
1606 BT_ERR("Frame is too short (len %d)", skb->len);
1611 hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE);
1613 BT_ERR("Frame is too short (len %d)", skb->len);
1618 len = __le16_to_cpu(hdr->slen);
1619 flags = hci_iso_data_flags(len);
1620 len = hci_iso_data_len(len);
1622 BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x", len,
1625 if (len == skb->len) {
1626 /* Complete frame received */
1627 iso_recv_frame(conn, skb);
1631 if (pb == ISO_SINGLE) {
1632 BT_ERR("Frame malformed (len %d, expected len %d)",
1637 if (skb->len > len) {
1638 BT_ERR("Frame is too long (len %d, expected len %d)",
1643 /* Allocate skb for the complete frame (with header) */
1644 conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL);
1648 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
1650 conn->rx_len = len - skb->len;
1654 BT_DBG("Cont: frag len %d (expecting %d)", skb->len,
1657 if (!conn->rx_len) {
1658 BT_ERR("Unexpected continuation frame (len %d)",
1663 if (skb->len > conn->rx_len) {
1664 BT_ERR("Fragment is too long (len %d, expected %d)",
1665 skb->len, conn->rx_len);
1666 kfree_skb(conn->rx_skb);
1667 conn->rx_skb = NULL;
1672 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
1674 conn->rx_len -= skb->len;
1678 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
1680 conn->rx_len -= skb->len;
1682 if (!conn->rx_len) {
1683 struct sk_buff *rx_skb = conn->rx_skb;
1685 /* Complete frame received. iso_recv_frame
1686 * takes ownership of the skb so set the global
1687 * rx_skb pointer to NULL first.
1689 conn->rx_skb = NULL;
1690 iso_recv_frame(conn, rx_skb);
1699 static struct hci_cb iso_cb = {
1701 .connect_cfm = iso_connect_cfm,
1702 .disconn_cfm = iso_disconn_cfm,
1705 static int iso_debugfs_show(struct seq_file *f, void *p)
1709 read_lock(&iso_sk_list.lock);
1711 sk_for_each(sk, &iso_sk_list.head) {
1712 seq_printf(f, "%pMR %pMR %d\n", &iso_pi(sk)->src,
1713 &iso_pi(sk)->dst, sk->sk_state);
1716 read_unlock(&iso_sk_list.lock);
1721 DEFINE_SHOW_ATTRIBUTE(iso_debugfs);
1723 static struct dentry *iso_debugfs;
1725 static const struct proto_ops iso_sock_ops = {
1726 .family = PF_BLUETOOTH,
1727 .owner = THIS_MODULE,
1728 .release = iso_sock_release,
1729 .bind = iso_sock_bind,
1730 .connect = iso_sock_connect,
1731 .listen = iso_sock_listen,
1732 .accept = iso_sock_accept,
1733 .getname = iso_sock_getname,
1734 .sendmsg = iso_sock_sendmsg,
1735 .recvmsg = iso_sock_recvmsg,
1736 .poll = bt_sock_poll,
1737 .ioctl = bt_sock_ioctl,
1738 .mmap = sock_no_mmap,
1739 .socketpair = sock_no_socketpair,
1740 .shutdown = iso_sock_shutdown,
1741 .setsockopt = iso_sock_setsockopt,
1742 .getsockopt = iso_sock_getsockopt
1745 static const struct net_proto_family iso_sock_family_ops = {
1746 .family = PF_BLUETOOTH,
1747 .owner = THIS_MODULE,
1748 .create = iso_sock_create,
1751 static bool iso_inited;
1753 bool iso_enabled(void)
1762 BUILD_BUG_ON(sizeof(struct sockaddr_iso) > sizeof(struct sockaddr));
1767 err = proto_register(&iso_proto, 0);
1771 err = bt_sock_register(BTPROTO_ISO, &iso_sock_family_ops);
1773 BT_ERR("ISO socket registration failed");
1777 err = bt_procfs_init(&init_net, "iso", &iso_sk_list, NULL);
1779 BT_ERR("Failed to create ISO proc file");
1780 bt_sock_unregister(BTPROTO_ISO);
1784 BT_INFO("ISO socket layer initialized");
1786 hci_register_cb(&iso_cb);
1788 if (IS_ERR_OR_NULL(bt_debugfs))
1792 iso_debugfs = debugfs_create_file("iso", 0444, bt_debugfs,
1793 NULL, &iso_debugfs_fops);
1801 proto_unregister(&iso_proto);
1810 bt_procfs_cleanup(&init_net, "iso");
1812 debugfs_remove(iso_debugfs);
1815 hci_unregister_cb(&iso_cb);
1817 bt_sock_unregister(BTPROTO_ISO);
1819 proto_unregister(&iso_proto);