1 // SPDX-License-Identifier: GPL-2.0
3 * BlueZ - Bluetooth protocol stack for Linux
5 * Copyright (C) 2022 Intel Corporation
9 #include <linux/module.h>
10 #include <linux/debugfs.h>
11 #include <linux/seq_file.h>
12 #include <linux/sched/signal.h>
14 #include <net/bluetooth/bluetooth.h>
15 #include <net/bluetooth/hci_core.h>
16 #include <net/bluetooth/iso.h>
19 static const struct proto_ops iso_sock_ops;
21 static struct bt_sock_list iso_sk_list = {
22 .lock = __RW_LOCK_UNLOCKED(iso_sk_list.lock)
25 /* ---- ISO connections ---- */
27 struct hci_conn *hcon;
29 /* @lock: spinlock protecting changes to iso_conn fields */
33 struct delayed_work timeout_work;
35 struct sk_buff *rx_skb;
40 #define iso_conn_lock(c) spin_lock(&(c)->lock)
41 #define iso_conn_unlock(c) spin_unlock(&(c)->lock)
43 static void iso_sock_close(struct sock *sk);
44 static void iso_sock_kill(struct sock *sk);
46 /* ----- ISO socket info ----- */
47 #define iso_pi(sk) ((struct iso_pinfo *)sk)
49 #define EIR_SERVICE_DATA_LENGTH 4
50 #define BASE_MAX_LENGTH (HCI_MAX_PER_AD_LENGTH - EIR_SERVICE_DATA_LENGTH)
51 #define EIR_BAA_SERVICE_UUID 0x1851
53 /* iso_pinfo flags values */
68 __u8 bc_bis[ISO_MAX_NUM_BIS];
71 struct bt_iso_qos qos;
74 __u8 base[BASE_MAX_LENGTH];
75 struct iso_conn *conn;
78 static struct bt_iso_qos default_qos;
80 static bool check_ucast_qos(struct bt_iso_qos *qos);
81 static bool check_bcast_qos(struct bt_iso_qos *qos);
82 static bool iso_match_sid(struct sock *sk, void *data);
83 static bool iso_match_sync_handle(struct sock *sk, void *data);
84 static void iso_sock_disconn(struct sock *sk);
86 typedef bool (*iso_sock_match_t)(struct sock *sk, void *data);
88 static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst,
89 iso_sock_match_t match, void *data);
91 /* ---- ISO timers ---- */
92 #define ISO_CONN_TIMEOUT (HZ * 40)
93 #define ISO_DISCONN_TIMEOUT (HZ * 2)
95 static void iso_sock_timeout(struct work_struct *work)
97 struct iso_conn *conn = container_of(work, struct iso_conn,
105 iso_conn_unlock(conn);
110 BT_DBG("sock %p state %d", sk, sk->sk_state);
113 sk->sk_err = ETIMEDOUT;
114 sk->sk_state_change(sk);
119 static void iso_sock_set_timer(struct sock *sk, long timeout)
121 if (!iso_pi(sk)->conn)
124 BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout);
125 cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
126 schedule_delayed_work(&iso_pi(sk)->conn->timeout_work, timeout);
129 static void iso_sock_clear_timer(struct sock *sk)
131 if (!iso_pi(sk)->conn)
134 BT_DBG("sock %p state %d", sk, sk->sk_state);
135 cancel_delayed_work(&iso_pi(sk)->conn->timeout_work);
138 /* ---- ISO connections ---- */
139 static struct iso_conn *iso_conn_add(struct hci_conn *hcon)
141 struct iso_conn *conn = hcon->iso_data;
149 conn = kzalloc(sizeof(*conn), GFP_KERNEL);
153 spin_lock_init(&conn->lock);
154 INIT_DELAYED_WORK(&conn->timeout_work, iso_sock_timeout);
156 hcon->iso_data = conn;
160 BT_DBG("hcon %p conn %p", hcon, conn);
165 /* Delete channel. Must be called on the locked socket. */
166 static void iso_chan_del(struct sock *sk, int err)
168 struct iso_conn *conn;
171 conn = iso_pi(sk)->conn;
173 BT_DBG("sk %p, conn %p, err %d", sk, conn, err);
178 iso_pi(sk)->conn = NULL;
179 iso_conn_unlock(conn);
182 hci_conn_drop(conn->hcon);
185 sk->sk_state = BT_CLOSED;
188 parent = bt_sk(sk)->parent;
190 bt_accept_unlink(sk);
191 parent->sk_data_ready(parent);
193 sk->sk_state_change(sk);
196 sock_set_flag(sk, SOCK_ZAPPED);
199 static bool iso_match_conn_sync_handle(struct sock *sk, void *data)
201 struct hci_conn *hcon = data;
203 if (test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags))
206 return hcon->sync_handle == iso_pi(sk)->sync_handle;
209 static void iso_conn_del(struct hci_conn *hcon, int err)
211 struct iso_conn *conn = hcon->iso_data;
218 BT_DBG("hcon %p conn %p, err %d", hcon, conn, err);
225 iso_conn_unlock(conn);
230 /* While a PA sync hcon is in the process of closing,
231 * mark parent socket with a flag, so that any residual
232 * BIGInfo adv reports that arrive before PA sync is
233 * terminated are not processed anymore.
235 if (test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) {
236 parent = iso_get_sock_listen(&hcon->src,
238 iso_match_conn_sync_handle,
242 set_bit(BT_SK_PA_SYNC_TERM,
243 &iso_pi(parent)->flags);
248 iso_sock_clear_timer(sk);
249 iso_chan_del(sk, err);
254 /* Ensure no more work items will run before freeing conn. */
255 cancel_delayed_work_sync(&conn->timeout_work);
257 hcon->iso_data = NULL;
261 static int __iso_chan_add(struct iso_conn *conn, struct sock *sk,
264 BT_DBG("conn %p", conn);
266 if (iso_pi(sk)->conn == conn && conn->sk == sk)
270 BT_ERR("conn->sk already set");
274 iso_pi(sk)->conn = conn;
278 bt_accept_enqueue(parent, sk, true);
283 static int iso_chan_add(struct iso_conn *conn, struct sock *sk,
289 err = __iso_chan_add(conn, sk, parent);
290 iso_conn_unlock(conn);
295 static inline u8 le_addr_type(u8 bdaddr_type)
297 if (bdaddr_type == BDADDR_LE_PUBLIC)
298 return ADDR_LE_DEV_PUBLIC;
300 return ADDR_LE_DEV_RANDOM;
303 static int iso_connect_bis(struct sock *sk)
305 struct iso_conn *conn;
306 struct hci_conn *hcon;
307 struct hci_dev *hdev;
310 BT_DBG("%pMR", &iso_pi(sk)->src);
312 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
313 iso_pi(sk)->src_type);
315 return -EHOSTUNREACH;
319 if (!bis_capable(hdev)) {
324 /* Fail if user set invalid QoS */
325 if (iso_pi(sk)->qos_user_set && !check_bcast_qos(&iso_pi(sk)->qos)) {
326 iso_pi(sk)->qos = default_qos;
331 /* Fail if out PHYs are marked as disabled */
332 if (!iso_pi(sk)->qos.bcast.out.phy) {
337 /* Just bind if DEFER_SETUP has been set */
338 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
339 hcon = hci_bind_bis(hdev, &iso_pi(sk)->dst,
340 &iso_pi(sk)->qos, iso_pi(sk)->base_len,
347 hcon = hci_connect_bis(hdev, &iso_pi(sk)->dst,
348 le_addr_type(iso_pi(sk)->dst_type),
349 &iso_pi(sk)->qos, iso_pi(sk)->base_len,
357 conn = iso_conn_add(hcon);
366 err = iso_chan_add(conn, sk, NULL);
372 /* Update source addr of the socket */
373 bacpy(&iso_pi(sk)->src, &hcon->src);
375 if (hcon->state == BT_CONNECTED) {
376 iso_sock_clear_timer(sk);
377 sk->sk_state = BT_CONNECTED;
378 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
379 iso_sock_clear_timer(sk);
380 sk->sk_state = BT_CONNECT;
382 sk->sk_state = BT_CONNECT;
383 iso_sock_set_timer(sk, sk->sk_sndtimeo);
389 hci_dev_unlock(hdev);
394 static int iso_connect_cis(struct sock *sk)
396 struct iso_conn *conn;
397 struct hci_conn *hcon;
398 struct hci_dev *hdev;
401 BT_DBG("%pMR -> %pMR", &iso_pi(sk)->src, &iso_pi(sk)->dst);
403 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
404 iso_pi(sk)->src_type);
406 return -EHOSTUNREACH;
410 if (!cis_central_capable(hdev)) {
415 /* Fail if user set invalid QoS */
416 if (iso_pi(sk)->qos_user_set && !check_ucast_qos(&iso_pi(sk)->qos)) {
417 iso_pi(sk)->qos = default_qos;
422 /* Fail if either PHYs are marked as disabled */
423 if (!iso_pi(sk)->qos.ucast.in.phy && !iso_pi(sk)->qos.ucast.out.phy) {
428 /* Just bind if DEFER_SETUP has been set */
429 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
430 hcon = hci_bind_cis(hdev, &iso_pi(sk)->dst,
431 le_addr_type(iso_pi(sk)->dst_type),
438 hcon = hci_connect_cis(hdev, &iso_pi(sk)->dst,
439 le_addr_type(iso_pi(sk)->dst_type),
447 conn = iso_conn_add(hcon);
456 err = iso_chan_add(conn, sk, NULL);
462 /* Update source addr of the socket */
463 bacpy(&iso_pi(sk)->src, &hcon->src);
465 if (hcon->state == BT_CONNECTED) {
466 iso_sock_clear_timer(sk);
467 sk->sk_state = BT_CONNECTED;
468 } else if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
469 iso_sock_clear_timer(sk);
470 sk->sk_state = BT_CONNECT;
472 sk->sk_state = BT_CONNECT;
473 iso_sock_set_timer(sk, sk->sk_sndtimeo);
479 hci_dev_unlock(hdev);
484 static struct bt_iso_qos *iso_sock_get_qos(struct sock *sk)
486 if (sk->sk_state == BT_CONNECTED || sk->sk_state == BT_CONNECT2)
487 return &iso_pi(sk)->conn->hcon->iso_qos;
489 return &iso_pi(sk)->qos;
492 static int iso_send_frame(struct sock *sk, struct sk_buff *skb)
494 struct iso_conn *conn = iso_pi(sk)->conn;
495 struct bt_iso_qos *qos = iso_sock_get_qos(sk);
496 struct hci_iso_data_hdr *hdr;
499 BT_DBG("sk %p len %d", sk, skb->len);
501 if (skb->len > qos->ucast.out.sdu)
506 /* Push ISO data header */
507 hdr = skb_push(skb, HCI_ISO_DATA_HDR_SIZE);
508 hdr->sn = cpu_to_le16(conn->tx_sn++);
509 hdr->slen = cpu_to_le16(hci_iso_data_len_pack(len,
510 HCI_ISO_STATUS_VALID));
512 if (sk->sk_state == BT_CONNECTED)
513 hci_send_iso(conn->hcon, skb);
520 static void iso_recv_frame(struct iso_conn *conn, struct sk_buff *skb)
526 iso_conn_unlock(conn);
531 BT_DBG("sk %p len %d", sk, skb->len);
533 if (sk->sk_state != BT_CONNECTED)
536 if (!sock_queue_rcv_skb(sk, skb))
543 /* -------- Socket interface ---------- */
544 static struct sock *__iso_get_sock_listen_by_addr(bdaddr_t *src, bdaddr_t *dst)
548 sk_for_each(sk, &iso_sk_list.head) {
549 if (sk->sk_state != BT_LISTEN)
552 if (bacmp(&iso_pi(sk)->dst, dst))
555 if (!bacmp(&iso_pi(sk)->src, src))
562 static struct sock *__iso_get_sock_listen_by_sid(bdaddr_t *ba, bdaddr_t *bc,
567 sk_for_each(sk, &iso_sk_list.head) {
568 if (sk->sk_state != BT_LISTEN)
571 if (bacmp(&iso_pi(sk)->src, ba))
574 if (bacmp(&iso_pi(sk)->dst, bc))
577 if (iso_pi(sk)->bc_sid == sid)
584 /* Find socket listening:
585 * source bdaddr (Unicast)
586 * destination bdaddr (Broadcast only)
587 * match func - pass NULL to ignore
588 * match func data - pass -1 to ignore
589 * Returns closest match.
591 static struct sock *iso_get_sock_listen(bdaddr_t *src, bdaddr_t *dst,
592 iso_sock_match_t match, void *data)
594 struct sock *sk = NULL, *sk1 = NULL;
596 read_lock(&iso_sk_list.lock);
598 sk_for_each(sk, &iso_sk_list.head) {
599 if (sk->sk_state != BT_LISTEN)
602 /* Match Broadcast destination */
603 if (bacmp(dst, BDADDR_ANY) && bacmp(&iso_pi(sk)->dst, dst))
606 /* Use Match function if provided */
607 if (match && !match(sk, data))
611 if (!bacmp(&iso_pi(sk)->src, src)) {
617 if (!bacmp(&iso_pi(sk)->src, BDADDR_ANY)) {
629 read_unlock(&iso_sk_list.lock);
631 return sk ? sk : sk1;
634 static struct sock *iso_get_sock_big(struct sock *match_sk, bdaddr_t *src,
635 bdaddr_t *dst, uint8_t big)
637 struct sock *sk = NULL;
639 read_lock(&iso_sk_list.lock);
641 sk_for_each(sk, &iso_sk_list.head) {
645 /* Look for sockets that have already been
646 * connected to the BIG
648 if (sk->sk_state != BT_CONNECTED &&
649 sk->sk_state != BT_CONNECT)
652 /* Match Broadcast destination */
653 if (bacmp(&iso_pi(sk)->dst, dst))
656 /* Match BIG handle */
657 if (iso_pi(sk)->qos.bcast.big != big)
660 /* Match source address */
661 if (bacmp(&iso_pi(sk)->src, src))
668 read_unlock(&iso_sk_list.lock);
673 static void iso_sock_destruct(struct sock *sk)
677 skb_queue_purge(&sk->sk_receive_queue);
678 skb_queue_purge(&sk->sk_write_queue);
681 static void iso_sock_cleanup_listen(struct sock *parent)
685 BT_DBG("parent %p", parent);
687 /* Close not yet accepted channels */
688 while ((sk = bt_accept_dequeue(parent, NULL))) {
693 /* If listening socket stands for a PA sync connection,
694 * properly disconnect the hcon and socket.
696 if (iso_pi(parent)->conn && iso_pi(parent)->conn->hcon &&
697 test_bit(HCI_CONN_PA_SYNC, &iso_pi(parent)->conn->hcon->flags)) {
698 iso_sock_disconn(parent);
702 parent->sk_state = BT_CLOSED;
703 sock_set_flag(parent, SOCK_ZAPPED);
706 /* Kill socket (only if zapped and orphan)
707 * Must be called on unlocked socket.
709 static void iso_sock_kill(struct sock *sk)
711 if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket ||
712 sock_flag(sk, SOCK_DEAD))
715 BT_DBG("sk %p state %d", sk, sk->sk_state);
717 /* Kill poor orphan */
718 bt_sock_unlink(&iso_sk_list, sk);
719 sock_set_flag(sk, SOCK_DEAD);
723 static void iso_sock_disconn(struct sock *sk)
726 struct hci_conn *hcon = iso_pi(sk)->conn->hcon;
728 if (test_bit(HCI_CONN_BIG_CREATED, &hcon->flags)) {
729 bis_sk = iso_get_sock_big(sk, &iso_pi(sk)->src,
731 iso_pi(sk)->qos.bcast.big);
733 /* If there are any other connected sockets for the
734 * same BIG, just delete the sk and leave the bis
735 * hcon active, in case later rebinding is needed.
738 hcon->state = BT_OPEN;
739 iso_pi(sk)->conn->hcon = NULL;
740 iso_sock_clear_timer(sk);
741 iso_chan_del(sk, bt_to_errno(hcon->abort_reason));
747 sk->sk_state = BT_DISCONN;
748 iso_sock_set_timer(sk, ISO_DISCONN_TIMEOUT);
749 iso_conn_lock(iso_pi(sk)->conn);
750 hci_conn_drop(iso_pi(sk)->conn->hcon);
751 iso_pi(sk)->conn->hcon = NULL;
752 iso_conn_unlock(iso_pi(sk)->conn);
755 static void __iso_sock_close(struct sock *sk)
757 BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket);
759 switch (sk->sk_state) {
761 iso_sock_cleanup_listen(sk);
767 if (iso_pi(sk)->conn->hcon)
768 iso_sock_disconn(sk);
770 iso_chan_del(sk, ECONNRESET);
774 if (iso_pi(sk)->conn->hcon &&
775 (test_bit(HCI_CONN_PA_SYNC, &iso_pi(sk)->conn->hcon->flags) ||
776 test_bit(HCI_CONN_PA_SYNC_FAILED, &iso_pi(sk)->conn->hcon->flags)))
777 iso_sock_disconn(sk);
779 iso_chan_del(sk, ECONNRESET);
782 iso_chan_del(sk, ECONNRESET);
786 sock_set_flag(sk, SOCK_ZAPPED);
791 /* Must be called on unlocked socket. */
792 static void iso_sock_close(struct sock *sk)
794 iso_sock_clear_timer(sk);
796 __iso_sock_close(sk);
801 static void iso_sock_init(struct sock *sk, struct sock *parent)
806 sk->sk_type = parent->sk_type;
807 bt_sk(sk)->flags = bt_sk(parent)->flags;
808 security_sk_clone(parent, sk);
812 static struct proto iso_proto = {
814 .owner = THIS_MODULE,
815 .obj_size = sizeof(struct iso_pinfo)
818 #define DEFAULT_IO_QOS \
820 .interval = 10000u, \
823 .phy = BT_ISO_PHY_2M, \
827 static struct bt_iso_qos default_qos = {
829 .big = BT_ISO_QOS_BIG_UNSET,
830 .bis = BT_ISO_QOS_BIS_UNSET,
834 .in = DEFAULT_IO_QOS,
835 .out = DEFAULT_IO_QOS,
840 .sync_timeout = BT_ISO_SYNC_TIMEOUT,
841 .sync_cte_type = 0x00,
843 .timeout = BT_ISO_SYNC_TIMEOUT,
847 static struct sock *iso_sock_alloc(struct net *net, struct socket *sock,
848 int proto, gfp_t prio, int kern)
852 sk = bt_sock_alloc(net, sock, &iso_proto, proto, prio, kern);
856 sk->sk_destruct = iso_sock_destruct;
857 sk->sk_sndtimeo = ISO_CONN_TIMEOUT;
859 /* Set address type as public as default src address is BDADDR_ANY */
860 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
862 iso_pi(sk)->qos = default_qos;
864 bt_sock_link(&iso_sk_list, sk);
868 static int iso_sock_create(struct net *net, struct socket *sock, int protocol,
873 BT_DBG("sock %p", sock);
875 sock->state = SS_UNCONNECTED;
877 if (sock->type != SOCK_SEQPACKET)
878 return -ESOCKTNOSUPPORT;
880 sock->ops = &iso_sock_ops;
882 sk = iso_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern);
886 iso_sock_init(sk, NULL);
890 static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr,
893 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
894 struct sock *sk = sock->sk;
897 BT_DBG("sk %p bc_sid %u bc_num_bis %u", sk, sa->iso_bc->bc_sid,
898 sa->iso_bc->bc_num_bis);
900 if (addr_len != sizeof(*sa) + sizeof(*sa->iso_bc))
903 bacpy(&iso_pi(sk)->dst, &sa->iso_bc->bc_bdaddr);
905 /* Check if the address type is of LE type */
906 if (!bdaddr_type_is_le(sa->iso_bc->bc_bdaddr_type))
909 iso_pi(sk)->dst_type = sa->iso_bc->bc_bdaddr_type;
910 iso_pi(sk)->sync_handle = -1;
912 if (sa->iso_bc->bc_sid > 0x0f)
915 iso_pi(sk)->bc_sid = sa->iso_bc->bc_sid;
917 if (sa->iso_bc->bc_num_bis > ISO_MAX_NUM_BIS)
920 iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
922 for (i = 0; i < iso_pi(sk)->bc_num_bis; i++)
923 if (sa->iso_bc->bc_bis[i] < 0x01 ||
924 sa->iso_bc->bc_bis[i] > 0x1f)
927 memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
928 iso_pi(sk)->bc_num_bis);
933 static int iso_sock_bind_pa_sk(struct sock *sk, struct sockaddr_iso *sa,
938 if (sk->sk_type != SOCK_SEQPACKET) {
943 if (addr_len != sizeof(*sa) + sizeof(*sa->iso_bc)) {
948 if (sa->iso_bc->bc_num_bis > ISO_MAX_NUM_BIS) {
953 iso_pi(sk)->bc_num_bis = sa->iso_bc->bc_num_bis;
955 for (int i = 0; i < iso_pi(sk)->bc_num_bis; i++)
956 if (sa->iso_bc->bc_bis[i] < 0x01 ||
957 sa->iso_bc->bc_bis[i] > 0x1f) {
962 memcpy(iso_pi(sk)->bc_bis, sa->iso_bc->bc_bis,
963 iso_pi(sk)->bc_num_bis);
969 static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
972 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
973 struct sock *sk = sock->sk;
976 BT_DBG("sk %p %pMR type %u", sk, &sa->iso_bdaddr, sa->iso_bdaddr_type);
978 if (!addr || addr_len < sizeof(struct sockaddr_iso) ||
979 addr->sa_family != AF_BLUETOOTH)
984 /* Allow the user to bind a PA sync socket to a number
985 * of BISes to sync to.
987 if (sk->sk_state == BT_CONNECT2 &&
988 test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags)) {
989 err = iso_sock_bind_pa_sk(sk, sa, addr_len);
993 if (sk->sk_state != BT_OPEN) {
998 if (sk->sk_type != SOCK_SEQPACKET) {
1003 /* Check if the address type is of LE type */
1004 if (!bdaddr_type_is_le(sa->iso_bdaddr_type)) {
1009 bacpy(&iso_pi(sk)->src, &sa->iso_bdaddr);
1010 iso_pi(sk)->src_type = sa->iso_bdaddr_type;
1012 /* Check for Broadcast address */
1013 if (addr_len > sizeof(*sa)) {
1014 err = iso_sock_bind_bc(sock, addr, addr_len);
1019 sk->sk_state = BT_BOUND;
1026 static int iso_sock_connect(struct socket *sock, struct sockaddr *addr,
1027 int alen, int flags)
1029 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
1030 struct sock *sk = sock->sk;
1033 BT_DBG("sk %p", sk);
1035 if (alen < sizeof(struct sockaddr_iso) ||
1036 addr->sa_family != AF_BLUETOOTH)
1039 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND)
1042 if (sk->sk_type != SOCK_SEQPACKET)
1045 /* Check if the address type is of LE type */
1046 if (!bdaddr_type_is_le(sa->iso_bdaddr_type))
1051 bacpy(&iso_pi(sk)->dst, &sa->iso_bdaddr);
1052 iso_pi(sk)->dst_type = sa->iso_bdaddr_type;
1056 if (bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
1057 err = iso_connect_cis(sk);
1059 err = iso_connect_bis(sk);
1066 if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
1067 err = bt_sock_wait_state(sk, BT_CONNECTED,
1068 sock_sndtimeo(sk, flags & O_NONBLOCK));
1075 static int iso_listen_bis(struct sock *sk)
1077 struct hci_dev *hdev;
1080 BT_DBG("%pMR -> %pMR (SID 0x%2.2x)", &iso_pi(sk)->src,
1081 &iso_pi(sk)->dst, iso_pi(sk)->bc_sid);
1083 write_lock(&iso_sk_list.lock);
1085 if (__iso_get_sock_listen_by_sid(&iso_pi(sk)->src, &iso_pi(sk)->dst,
1086 iso_pi(sk)->bc_sid))
1089 write_unlock(&iso_sk_list.lock);
1094 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
1095 iso_pi(sk)->src_type);
1097 return -EHOSTUNREACH;
1099 /* Fail if user set invalid QoS */
1100 if (iso_pi(sk)->qos_user_set && !check_bcast_qos(&iso_pi(sk)->qos)) {
1101 iso_pi(sk)->qos = default_qos;
1105 err = hci_pa_create_sync(hdev, &iso_pi(sk)->dst,
1106 le_addr_type(iso_pi(sk)->dst_type),
1107 iso_pi(sk)->bc_sid, &iso_pi(sk)->qos);
1114 static int iso_listen_cis(struct sock *sk)
1118 BT_DBG("%pMR", &iso_pi(sk)->src);
1120 write_lock(&iso_sk_list.lock);
1122 if (__iso_get_sock_listen_by_addr(&iso_pi(sk)->src, &iso_pi(sk)->dst))
1125 write_unlock(&iso_sk_list.lock);
1130 static int iso_sock_listen(struct socket *sock, int backlog)
1132 struct sock *sk = sock->sk;
1135 BT_DBG("sk %p backlog %d", sk, backlog);
1139 if (sk->sk_state != BT_BOUND) {
1144 if (sk->sk_type != SOCK_SEQPACKET) {
1149 if (!bacmp(&iso_pi(sk)->dst, BDADDR_ANY))
1150 err = iso_listen_cis(sk);
1152 err = iso_listen_bis(sk);
1157 sk->sk_max_ack_backlog = backlog;
1158 sk->sk_ack_backlog = 0;
1160 sk->sk_state = BT_LISTEN;
1167 static int iso_sock_accept(struct socket *sock, struct socket *newsock,
1168 int flags, bool kern)
1170 DEFINE_WAIT_FUNC(wait, woken_wake_function);
1171 struct sock *sk = sock->sk, *ch;
1177 timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK);
1179 BT_DBG("sk %p timeo %ld", sk, timeo);
1181 /* Wait for an incoming connection. (wake-one). */
1182 add_wait_queue_exclusive(sk_sleep(sk), &wait);
1184 if (sk->sk_state != BT_LISTEN) {
1189 ch = bt_accept_dequeue(sk, newsock);
1198 if (signal_pending(current)) {
1199 err = sock_intr_errno(timeo);
1205 timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo);
1208 remove_wait_queue(sk_sleep(sk), &wait);
1213 newsock->state = SS_CONNECTED;
1215 BT_DBG("new socket %p", ch);
1222 static int iso_sock_getname(struct socket *sock, struct sockaddr *addr,
1225 struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
1226 struct sock *sk = sock->sk;
1228 BT_DBG("sock %p, sk %p", sock, sk);
1230 addr->sa_family = AF_BLUETOOTH;
1233 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->dst);
1234 sa->iso_bdaddr_type = iso_pi(sk)->dst_type;
1236 bacpy(&sa->iso_bdaddr, &iso_pi(sk)->src);
1237 sa->iso_bdaddr_type = iso_pi(sk)->src_type;
1240 return sizeof(struct sockaddr_iso);
1243 static int iso_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1246 struct sock *sk = sock->sk;
1247 struct sk_buff *skb, **frag;
1251 BT_DBG("sock %p, sk %p", sock, sk);
1253 err = sock_error(sk);
1257 if (msg->msg_flags & MSG_OOB)
1262 if (sk->sk_state != BT_CONNECTED) {
1267 mtu = iso_pi(sk)->conn->hcon->hdev->iso_mtu;
1271 skb = bt_skb_sendmsg(sk, msg, len, mtu, HCI_ISO_DATA_HDR_SIZE, 0);
1273 return PTR_ERR(skb);
1277 BT_DBG("skb %p len %d", sk, skb->len);
1279 /* Continuation fragments */
1280 frag = &skb_shinfo(skb)->frag_list;
1282 struct sk_buff *tmp;
1284 tmp = bt_skb_sendmsg(sk, msg, len, mtu, 0, 0);
1287 return PTR_ERR(tmp);
1294 skb->len += tmp->len;
1295 skb->data_len += tmp->len;
1297 BT_DBG("frag %p len %d", *frag, tmp->len);
1299 frag = &(*frag)->next;
1304 if (sk->sk_state == BT_CONNECTED)
1305 err = iso_send_frame(sk, skb);
1316 static void iso_conn_defer_accept(struct hci_conn *conn)
1318 struct hci_cp_le_accept_cis cp;
1319 struct hci_dev *hdev = conn->hdev;
1321 BT_DBG("conn %p", conn);
1323 conn->state = BT_CONFIG;
1325 cp.handle = cpu_to_le16(conn->handle);
1327 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
1330 static void iso_conn_big_sync(struct sock *sk)
1333 struct hci_dev *hdev;
1335 hdev = hci_get_route(&iso_pi(sk)->dst, &iso_pi(sk)->src,
1336 iso_pi(sk)->src_type);
1341 if (!test_and_set_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags)) {
1342 err = hci_le_big_create_sync(hdev, iso_pi(sk)->conn->hcon,
1344 iso_pi(sk)->sync_handle,
1345 iso_pi(sk)->bc_num_bis,
1346 iso_pi(sk)->bc_bis);
1348 bt_dev_err(hdev, "hci_le_big_create_sync: %d",
1353 static int iso_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1354 size_t len, int flags)
1356 struct sock *sk = sock->sk;
1357 struct iso_pinfo *pi = iso_pi(sk);
1359 BT_DBG("sk %p", sk);
1361 if (test_and_clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) {
1363 switch (sk->sk_state) {
1365 if (pi->conn->hcon &&
1366 test_bit(HCI_CONN_PA_SYNC, &pi->conn->hcon->flags)) {
1367 iso_conn_big_sync(sk);
1368 sk->sk_state = BT_LISTEN;
1370 iso_conn_defer_accept(pi->conn->hcon);
1371 sk->sk_state = BT_CONFIG;
1377 return iso_connect_cis(sk);
1384 return bt_sock_recvmsg(sock, msg, len, flags);
1387 static bool check_io_qos(struct bt_iso_io_qos *qos)
1389 /* If no PHY is enable SDU must be 0 */
1390 if (!qos->phy && qos->sdu)
1393 if (qos->interval && (qos->interval < 0xff || qos->interval > 0xfffff))
1396 if (qos->latency && (qos->latency < 0x05 || qos->latency > 0xfa0))
1399 if (qos->phy > BT_ISO_PHY_ANY)
1405 static bool check_ucast_qos(struct bt_iso_qos *qos)
1407 if (qos->ucast.cig > 0xef && qos->ucast.cig != BT_ISO_QOS_CIG_UNSET)
1410 if (qos->ucast.cis > 0xef && qos->ucast.cis != BT_ISO_QOS_CIS_UNSET)
1413 if (qos->ucast.sca > 0x07)
1416 if (qos->ucast.packing > 0x01)
1419 if (qos->ucast.framing > 0x01)
1422 if (!check_io_qos(&qos->ucast.in))
1425 if (!check_io_qos(&qos->ucast.out))
1431 static bool check_bcast_qos(struct bt_iso_qos *qos)
1433 if (!qos->bcast.sync_factor)
1434 qos->bcast.sync_factor = 0x01;
1436 if (qos->bcast.packing > 0x01)
1439 if (qos->bcast.framing > 0x01)
1442 if (!check_io_qos(&qos->bcast.in))
1445 if (!check_io_qos(&qos->bcast.out))
1448 if (qos->bcast.encryption > 0x01)
1451 if (qos->bcast.options > 0x07)
1454 if (qos->bcast.skip > 0x01f3)
1457 if (!qos->bcast.sync_timeout)
1458 qos->bcast.sync_timeout = BT_ISO_SYNC_TIMEOUT;
1460 if (qos->bcast.sync_timeout < 0x000a || qos->bcast.sync_timeout > 0x4000)
1463 if (qos->bcast.sync_cte_type > 0x1f)
1466 if (qos->bcast.mse > 0x1f)
1469 if (!qos->bcast.timeout)
1470 qos->bcast.sync_timeout = BT_ISO_SYNC_TIMEOUT;
1472 if (qos->bcast.timeout < 0x000a || qos->bcast.timeout > 0x4000)
1478 static int iso_sock_setsockopt(struct socket *sock, int level, int optname,
1479 sockptr_t optval, unsigned int optlen)
1481 struct sock *sk = sock->sk;
1483 struct bt_iso_qos qos = default_qos;
1486 BT_DBG("sk %p", sk);
1491 case BT_DEFER_SETUP:
1492 if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) {
1497 err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen);
1502 set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
1504 clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags);
1508 err = bt_copy_from_sockptr(&opt, sizeof(opt), optval, optlen);
1513 set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
1515 clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags);
1519 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
1520 sk->sk_state != BT_CONNECT2) {
1525 err = bt_copy_from_sockptr(&qos, sizeof(qos), optval, optlen);
1529 iso_pi(sk)->qos = qos;
1530 iso_pi(sk)->qos_user_set = true;
1535 if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND &&
1536 sk->sk_state != BT_CONNECT2) {
1541 if (optlen > sizeof(iso_pi(sk)->base)) {
1546 err = bt_copy_from_sockptr(iso_pi(sk)->base, optlen, optval,
1551 iso_pi(sk)->base_len = optlen;
1564 static int iso_sock_getsockopt(struct socket *sock, int level, int optname,
1565 char __user *optval, int __user *optlen)
1567 struct sock *sk = sock->sk;
1569 struct bt_iso_qos *qos;
1573 BT_DBG("sk %p", sk);
1575 if (get_user(len, optlen))
1581 case BT_DEFER_SETUP:
1582 if (sk->sk_state == BT_CONNECTED) {
1587 if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags),
1588 (u32 __user *)optval))
1594 if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags),
1595 (int __user *)optval))
1600 qos = iso_sock_get_qos(sk);
1602 len = min_t(unsigned int, len, sizeof(*qos));
1603 if (copy_to_user(optval, qos, len))
1609 if (sk->sk_state == BT_CONNECTED &&
1610 !bacmp(&iso_pi(sk)->dst, BDADDR_ANY)) {
1611 base_len = iso_pi(sk)->conn->hcon->le_per_adv_data_len;
1612 base = iso_pi(sk)->conn->hcon->le_per_adv_data;
1614 base_len = iso_pi(sk)->base_len;
1615 base = iso_pi(sk)->base;
1618 len = min_t(unsigned int, len, base_len);
1619 if (copy_to_user(optval, base, len))
1621 if (put_user(len, optlen))
1635 static int iso_sock_shutdown(struct socket *sock, int how)
1637 struct sock *sk = sock->sk;
1640 BT_DBG("sock %p, sk %p, how %d", sock, sk, how);
1650 if (sk->sk_shutdown & RCV_SHUTDOWN)
1652 sk->sk_shutdown |= RCV_SHUTDOWN;
1655 if (sk->sk_shutdown & SEND_SHUTDOWN)
1657 sk->sk_shutdown |= SEND_SHUTDOWN;
1660 if (sk->sk_shutdown & SHUTDOWN_MASK)
1662 sk->sk_shutdown |= SHUTDOWN_MASK;
1666 iso_sock_clear_timer(sk);
1667 __iso_sock_close(sk);
1669 if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime &&
1670 !(current->flags & PF_EXITING))
1671 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1680 static int iso_sock_release(struct socket *sock)
1682 struct sock *sk = sock->sk;
1685 BT_DBG("sock %p, sk %p", sock, sk);
1692 if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) &&
1693 !(current->flags & PF_EXITING)) {
1695 err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime);
1704 static void iso_sock_ready(struct sock *sk)
1706 BT_DBG("sk %p", sk);
1712 iso_sock_clear_timer(sk);
1713 sk->sk_state = BT_CONNECTED;
1714 sk->sk_state_change(sk);
1718 struct iso_list_data {
1719 struct hci_conn *hcon;
1723 static bool iso_match_big(struct sock *sk, void *data)
1725 struct hci_evt_le_big_sync_estabilished *ev = data;
1727 return ev->handle == iso_pi(sk)->qos.bcast.big;
1730 static bool iso_match_pa_sync_flag(struct sock *sk, void *data)
1732 return test_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags);
1735 static void iso_conn_ready(struct iso_conn *conn)
1737 struct sock *parent = NULL;
1738 struct sock *sk = conn->sk;
1739 struct hci_ev_le_big_sync_estabilished *ev = NULL;
1740 struct hci_ev_le_pa_sync_established *ev2 = NULL;
1741 struct hci_evt_le_big_info_adv_report *ev3 = NULL;
1742 struct hci_conn *hcon;
1744 BT_DBG("conn %p", conn);
1747 iso_sock_ready(conn->sk);
1753 if (test_bit(HCI_CONN_BIG_SYNC, &hcon->flags) ||
1754 test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags)) {
1755 ev = hci_recv_event_data(hcon->hdev,
1756 HCI_EVT_LE_BIG_SYNC_ESTABILISHED);
1758 /* Get reference to PA sync parent socket, if it exists */
1759 parent = iso_get_sock_listen(&hcon->src,
1761 iso_match_pa_sync_flag, NULL);
1763 parent = iso_get_sock_listen(&hcon->src,
1766 } else if (test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) {
1767 ev2 = hci_recv_event_data(hcon->hdev,
1768 HCI_EV_LE_PA_SYNC_ESTABLISHED);
1770 parent = iso_get_sock_listen(&hcon->src,
1772 iso_match_sid, ev2);
1773 } else if (test_bit(HCI_CONN_PA_SYNC, &hcon->flags)) {
1774 ev3 = hci_recv_event_data(hcon->hdev,
1775 HCI_EVT_LE_BIG_INFO_ADV_REPORT);
1777 parent = iso_get_sock_listen(&hcon->src,
1779 iso_match_sync_handle, ev3);
1783 parent = iso_get_sock_listen(&hcon->src,
1784 BDADDR_ANY, NULL, NULL);
1791 sk = iso_sock_alloc(sock_net(parent), NULL,
1792 BTPROTO_ISO, GFP_ATOMIC, 0);
1794 release_sock(parent);
1798 iso_sock_init(sk, parent);
1800 bacpy(&iso_pi(sk)->src, &hcon->src);
1802 /* Convert from HCI to three-value type */
1803 if (hcon->src_type == ADDR_LE_DEV_PUBLIC)
1804 iso_pi(sk)->src_type = BDADDR_LE_PUBLIC;
1806 iso_pi(sk)->src_type = BDADDR_LE_RANDOM;
1808 /* If hcon has no destination address (BDADDR_ANY) it means it
1809 * was created by HCI_EV_LE_BIG_SYNC_ESTABILISHED or
1810 * HCI_EV_LE_PA_SYNC_ESTABLISHED so we need to initialize using
1811 * the parent socket destination address.
1813 if (!bacmp(&hcon->dst, BDADDR_ANY)) {
1814 bacpy(&hcon->dst, &iso_pi(parent)->dst);
1815 hcon->dst_type = iso_pi(parent)->dst_type;
1816 hcon->sync_handle = iso_pi(parent)->sync_handle;
1820 iso_pi(sk)->qos = iso_pi(parent)->qos;
1821 iso_pi(sk)->qos.bcast.encryption = ev3->encryption;
1822 hcon->iso_qos = iso_pi(sk)->qos;
1823 iso_pi(sk)->bc_num_bis = iso_pi(parent)->bc_num_bis;
1824 memcpy(iso_pi(sk)->bc_bis, iso_pi(parent)->bc_bis, ISO_MAX_NUM_BIS);
1825 set_bit(BT_SK_PA_SYNC, &iso_pi(sk)->flags);
1828 bacpy(&iso_pi(sk)->dst, &hcon->dst);
1829 iso_pi(sk)->dst_type = hcon->dst_type;
1830 iso_pi(sk)->sync_handle = iso_pi(parent)->sync_handle;
1831 memcpy(iso_pi(sk)->base, iso_pi(parent)->base, iso_pi(parent)->base_len);
1832 iso_pi(sk)->base_len = iso_pi(parent)->base_len;
1834 hci_conn_hold(hcon);
1835 iso_chan_add(conn, sk, parent);
1837 if ((ev && ((struct hci_evt_le_big_sync_estabilished *)ev)->status) ||
1838 (ev2 && ev2->status)) {
1839 /* Trigger error signal on child socket */
1840 sk->sk_err = ECONNREFUSED;
1841 sk->sk_error_report(sk);
1844 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags))
1845 sk->sk_state = BT_CONNECT2;
1847 sk->sk_state = BT_CONNECTED;
1849 /* Wake up parent */
1850 parent->sk_data_ready(parent);
1852 release_sock(parent);
1857 static bool iso_match_sid(struct sock *sk, void *data)
1859 struct hci_ev_le_pa_sync_established *ev = data;
1861 return ev->sid == iso_pi(sk)->bc_sid;
1864 static bool iso_match_sync_handle(struct sock *sk, void *data)
1866 struct hci_evt_le_big_info_adv_report *ev = data;
1868 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
1871 static bool iso_match_sync_handle_pa_report(struct sock *sk, void *data)
1873 struct hci_ev_le_per_adv_report *ev = data;
1875 return le16_to_cpu(ev->sync_handle) == iso_pi(sk)->sync_handle;
1878 /* ----- ISO interface with lower layer (HCI) ----- */
1880 int iso_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags)
1882 struct hci_ev_le_pa_sync_established *ev1;
1883 struct hci_evt_le_big_info_adv_report *ev2;
1884 struct hci_ev_le_per_adv_report *ev3;
1888 bt_dev_dbg(hdev, "bdaddr %pMR", bdaddr);
1890 /* Broadcast receiver requires handling of some events before it can
1891 * proceed to establishing a BIG sync:
1893 * 1. HCI_EV_LE_PA_SYNC_ESTABLISHED: The socket may specify a specific
1894 * SID to listen to and once sync is estabilished its handle needs to
1895 * be stored in iso_pi(sk)->sync_handle so it can be matched once
1896 * receiving the BIG Info.
1897 * 2. HCI_EVT_LE_BIG_INFO_ADV_REPORT: When connect_ind is triggered by a
1898 * a BIG Info it attempts to check if there any listening socket with
1899 * the same sync_handle and if it does then attempt to create a sync.
1900 * 3. HCI_EV_LE_PER_ADV_REPORT: When a PA report is received, it is stored
1901 * in iso_pi(sk)->base so it can be passed up to user, in the case of a
1904 ev1 = hci_recv_event_data(hdev, HCI_EV_LE_PA_SYNC_ESTABLISHED);
1906 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr, iso_match_sid,
1908 if (sk && !ev1->status)
1909 iso_pi(sk)->sync_handle = le16_to_cpu(ev1->handle);
1914 ev2 = hci_recv_event_data(hdev, HCI_EVT_LE_BIG_INFO_ADV_REPORT);
1916 /* Try to get PA sync listening socket, if it exists */
1917 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1918 iso_match_pa_sync_flag, NULL);
1921 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1922 iso_match_sync_handle, ev2);
1924 /* If PA Sync is in process of terminating,
1925 * do not handle any more BIGInfo adv reports.
1928 if (sk && test_bit(BT_SK_PA_SYNC_TERM,
1929 &iso_pi(sk)->flags))
1936 if (ev2->num_bis < iso_pi(sk)->bc_num_bis)
1937 iso_pi(sk)->bc_num_bis = ev2->num_bis;
1939 if (!test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags) &&
1940 !test_and_set_bit(BT_SK_BIG_SYNC, &iso_pi(sk)->flags)) {
1941 err = hci_le_big_create_sync(hdev, NULL,
1943 iso_pi(sk)->sync_handle,
1944 iso_pi(sk)->bc_num_bis,
1945 iso_pi(sk)->bc_bis);
1947 bt_dev_err(hdev, "hci_le_big_create_sync: %d",
1956 ev3 = hci_recv_event_data(hdev, HCI_EV_LE_PER_ADV_REPORT);
1958 size_t base_len = ev3->length;
1961 sk = iso_get_sock_listen(&hdev->bdaddr, bdaddr,
1962 iso_match_sync_handle_pa_report, ev3);
1963 base = eir_get_service_data(ev3->data, ev3->length,
1964 EIR_BAA_SERVICE_UUID, &base_len);
1965 if (base && sk && base_len <= sizeof(iso_pi(sk)->base)) {
1966 memcpy(iso_pi(sk)->base, base, base_len);
1967 iso_pi(sk)->base_len = base_len;
1970 sk = iso_get_sock_listen(&hdev->bdaddr, BDADDR_ANY, NULL, NULL);
1977 lm |= HCI_LM_ACCEPT;
1979 if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))
1980 *flags |= HCI_PROTO_DEFER;
1987 static void iso_connect_cfm(struct hci_conn *hcon, __u8 status)
1989 if (hcon->type != ISO_LINK) {
1990 if (hcon->type != LE_LINK)
1993 /* Check if LE link has failed */
1995 struct hci_link *link, *t;
1997 list_for_each_entry_safe(link, t, &hcon->link_list,
1999 iso_conn_del(link->conn, bt_to_errno(status));
2004 /* Create CIS if pending */
2005 hci_le_create_cis_pending(hcon->hdev);
2009 BT_DBG("hcon %p bdaddr %pMR status %d", hcon, &hcon->dst, status);
2011 /* Similar to the success case, if HCI_CONN_BIG_SYNC_FAILED or
2012 * HCI_CONN_PA_SYNC_FAILED is set, queue the failed connection
2013 * into the accept queue of the listening socket and wake up
2014 * userspace, to inform the user about the event.
2016 if (!status || test_bit(HCI_CONN_BIG_SYNC_FAILED, &hcon->flags) ||
2017 test_bit(HCI_CONN_PA_SYNC_FAILED, &hcon->flags)) {
2018 struct iso_conn *conn;
2020 conn = iso_conn_add(hcon);
2022 iso_conn_ready(conn);
2024 iso_conn_del(hcon, bt_to_errno(status));
2028 static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason)
2030 if (hcon->type != ISO_LINK)
2033 BT_DBG("hcon %p reason %d", hcon, reason);
2035 iso_conn_del(hcon, bt_to_errno(reason));
2038 void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags)
2040 struct iso_conn *conn = hcon->iso_data;
2046 pb = hci_iso_flags_pb(flags);
2047 ts = hci_iso_flags_ts(flags);
2049 BT_DBG("conn %p len %d pb 0x%x ts 0x%x", conn, skb->len, pb, ts);
2055 BT_ERR("Unexpected start frame (len %d)", skb->len);
2056 kfree_skb(conn->rx_skb);
2057 conn->rx_skb = NULL;
2062 struct hci_iso_ts_data_hdr *hdr;
2064 /* TODO: add timestamp to the packet? */
2065 hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE);
2067 BT_ERR("Frame is too short (len %d)", skb->len);
2071 len = __le16_to_cpu(hdr->slen);
2073 struct hci_iso_data_hdr *hdr;
2075 hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE);
2077 BT_ERR("Frame is too short (len %d)", skb->len);
2081 len = __le16_to_cpu(hdr->slen);
2084 flags = hci_iso_data_flags(len);
2085 len = hci_iso_data_len(len);
2087 BT_DBG("Start: total len %d, frag len %d flags 0x%4.4x", len,
2090 if (len == skb->len) {
2091 /* Complete frame received */
2092 hci_skb_pkt_status(skb) = flags & 0x03;
2093 iso_recv_frame(conn, skb);
2097 if (pb == ISO_SINGLE) {
2098 BT_ERR("Frame malformed (len %d, expected len %d)",
2103 if (skb->len > len) {
2104 BT_ERR("Frame is too long (len %d, expected len %d)",
2109 /* Allocate skb for the complete frame (with header) */
2110 conn->rx_skb = bt_skb_alloc(len, GFP_KERNEL);
2114 hci_skb_pkt_status(conn->rx_skb) = flags & 0x03;
2115 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
2117 conn->rx_len = len - skb->len;
2121 BT_DBG("Cont: frag len %d (expecting %d)", skb->len,
2124 if (!conn->rx_len) {
2125 BT_ERR("Unexpected continuation frame (len %d)",
2130 if (skb->len > conn->rx_len) {
2131 BT_ERR("Fragment is too long (len %d, expected %d)",
2132 skb->len, conn->rx_len);
2133 kfree_skb(conn->rx_skb);
2134 conn->rx_skb = NULL;
2139 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
2141 conn->rx_len -= skb->len;
2145 skb_copy_from_linear_data(skb, skb_put(conn->rx_skb, skb->len),
2147 conn->rx_len -= skb->len;
2149 if (!conn->rx_len) {
2150 struct sk_buff *rx_skb = conn->rx_skb;
2152 /* Complete frame received. iso_recv_frame
2153 * takes ownership of the skb so set the global
2154 * rx_skb pointer to NULL first.
2156 conn->rx_skb = NULL;
2157 iso_recv_frame(conn, rx_skb);
2166 static struct hci_cb iso_cb = {
2168 .connect_cfm = iso_connect_cfm,
2169 .disconn_cfm = iso_disconn_cfm,
2172 static int iso_debugfs_show(struct seq_file *f, void *p)
2176 read_lock(&iso_sk_list.lock);
2178 sk_for_each(sk, &iso_sk_list.head) {
2179 seq_printf(f, "%pMR %pMR %d\n", &iso_pi(sk)->src,
2180 &iso_pi(sk)->dst, sk->sk_state);
2183 read_unlock(&iso_sk_list.lock);
2188 DEFINE_SHOW_ATTRIBUTE(iso_debugfs);
2190 static struct dentry *iso_debugfs;
2192 static const struct proto_ops iso_sock_ops = {
2193 .family = PF_BLUETOOTH,
2194 .owner = THIS_MODULE,
2195 .release = iso_sock_release,
2196 .bind = iso_sock_bind,
2197 .connect = iso_sock_connect,
2198 .listen = iso_sock_listen,
2199 .accept = iso_sock_accept,
2200 .getname = iso_sock_getname,
2201 .sendmsg = iso_sock_sendmsg,
2202 .recvmsg = iso_sock_recvmsg,
2203 .poll = bt_sock_poll,
2204 .ioctl = bt_sock_ioctl,
2205 .mmap = sock_no_mmap,
2206 .socketpair = sock_no_socketpair,
2207 .shutdown = iso_sock_shutdown,
2208 .setsockopt = iso_sock_setsockopt,
2209 .getsockopt = iso_sock_getsockopt
2212 static const struct net_proto_family iso_sock_family_ops = {
2213 .family = PF_BLUETOOTH,
2214 .owner = THIS_MODULE,
2215 .create = iso_sock_create,
2218 static bool iso_inited;
2220 bool iso_enabled(void)
2229 BUILD_BUG_ON(sizeof(struct sockaddr_iso) > sizeof(struct sockaddr));
2234 err = proto_register(&iso_proto, 0);
2238 err = bt_sock_register(BTPROTO_ISO, &iso_sock_family_ops);
2240 BT_ERR("ISO socket registration failed");
2244 err = bt_procfs_init(&init_net, "iso", &iso_sk_list, NULL);
2246 BT_ERR("Failed to create ISO proc file");
2247 bt_sock_unregister(BTPROTO_ISO);
2251 BT_INFO("ISO socket layer initialized");
2253 hci_register_cb(&iso_cb);
2255 if (IS_ERR_OR_NULL(bt_debugfs))
2259 iso_debugfs = debugfs_create_file("iso", 0444, bt_debugfs,
2260 NULL, &iso_debugfs_fops);
2268 proto_unregister(&iso_proto);
2277 bt_procfs_cleanup(&init_net, "iso");
2279 debugfs_remove(iso_debugfs);
2282 hci_unregister_cb(&iso_cb);
2284 bt_sock_unregister(BTPROTO_ISO);
2286 proto_unregister(&iso_proto);