diff options
Diffstat (limited to 'net/bluetooth/sco.c')
| -rw-r--r-- | net/bluetooth/sco.c | 1499 |
1 files changed, 1499 insertions, 0 deletions
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c new file mode 100644 index 0000000000..c736186aba --- /dev/null +++ b/net/bluetooth/sco.c @@ -0,0 +1,1499 @@ +/* + BlueZ - Bluetooth protocol stack for Linux + Copyright (C) 2000-2001 Qualcomm Incorporated + + Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License version 2 as + published by the Free Software Foundation; + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. + IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY + CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + + ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, + COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS + SOFTWARE IS DISCLAIMED. +*/ + +/* Bluetooth SCO sockets. */ + +#include <linux/module.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/sched/signal.h> + +#include <net/bluetooth/bluetooth.h> +#include <net/bluetooth/hci_core.h> +#include <net/bluetooth/sco.h> + +static bool disable_esco; + +static const struct proto_ops sco_sock_ops; + +static struct bt_sock_list sco_sk_list = { + .lock = __RW_LOCK_UNLOCKED(sco_sk_list.lock) +}; + +/* ---- SCO connections ---- */ +struct sco_conn { + struct hci_conn *hcon; + + spinlock_t lock; + struct sock *sk; + + struct delayed_work timeout_work; + + unsigned int mtu; +}; + +#define sco_conn_lock(c) spin_lock(&c->lock) +#define sco_conn_unlock(c) spin_unlock(&c->lock) + +static void sco_sock_close(struct sock *sk); +static void sco_sock_kill(struct sock *sk); + +/* ----- SCO socket info ----- */ +#define sco_pi(sk) ((struct sco_pinfo *) sk) + +struct sco_pinfo { + struct bt_sock bt; + bdaddr_t src; + bdaddr_t dst; + __u32 flags; + __u16 setting; + struct bt_codec codec; + struct sco_conn *conn; +}; + +/* ---- SCO timers ---- */ +#define SCO_CONN_TIMEOUT (HZ * 40) +#define SCO_DISCONN_TIMEOUT (HZ * 2) + +static void sco_sock_timeout(struct work_struct *work) +{ + struct sco_conn *conn = container_of(work, struct sco_conn, + timeout_work.work); + struct sock *sk; + + sco_conn_lock(conn); + sk = conn->sk; + if (sk) + sock_hold(sk); + sco_conn_unlock(conn); + + if (!sk) + return; + + BT_DBG("sock %p state %d", sk, sk->sk_state); + + lock_sock(sk); + sk->sk_err = ETIMEDOUT; + sk->sk_state_change(sk); + release_sock(sk); + sock_put(sk); +} + +static void sco_sock_set_timer(struct sock *sk, long timeout) +{ + if (!sco_pi(sk)->conn) + return; + + BT_DBG("sock %p state %d timeout %ld", sk, sk->sk_state, timeout); + cancel_delayed_work(&sco_pi(sk)->conn->timeout_work); + schedule_delayed_work(&sco_pi(sk)->conn->timeout_work, timeout); +} + +static void sco_sock_clear_timer(struct sock *sk) +{ + if (!sco_pi(sk)->conn) + return; + + BT_DBG("sock %p state %d", sk, sk->sk_state); + cancel_delayed_work(&sco_pi(sk)->conn->timeout_work); +} + +/* ---- SCO connections ---- */ +static struct sco_conn *sco_conn_add(struct hci_conn *hcon) +{ + struct hci_dev *hdev = hcon->hdev; + struct sco_conn *conn = hcon->sco_data; + + if (conn) { + if (!conn->hcon) + conn->hcon = hcon; + return conn; + } + + conn = kzalloc(sizeof(struct sco_conn), GFP_KERNEL); + if (!conn) + return NULL; + + spin_lock_init(&conn->lock); + INIT_DELAYED_WORK(&conn->timeout_work, sco_sock_timeout); + + hcon->sco_data = conn; + conn->hcon = hcon; + + if (hdev->sco_mtu > 0) + conn->mtu = hdev->sco_mtu; + else + conn->mtu = 60; + + BT_DBG("hcon %p conn %p", hcon, conn); + + return conn; +} + +/* Delete channel. + * Must be called on the locked socket. */ +static void sco_chan_del(struct sock *sk, int err) +{ + struct sco_conn *conn; + + conn = sco_pi(sk)->conn; + + BT_DBG("sk %p, conn %p, err %d", sk, conn, err); + + if (conn) { + sco_conn_lock(conn); + conn->sk = NULL; + sco_pi(sk)->conn = NULL; + sco_conn_unlock(conn); + + if (conn->hcon) + hci_conn_drop(conn->hcon); + } + + sk->sk_state = BT_CLOSED; + sk->sk_err = err; + sk->sk_state_change(sk); + + sock_set_flag(sk, SOCK_ZAPPED); +} + +static void sco_conn_del(struct hci_conn *hcon, int err) +{ + struct sco_conn *conn = hcon->sco_data; + struct sock *sk; + + if (!conn) + return; + + BT_DBG("hcon %p conn %p, err %d", hcon, conn, err); + + /* Kill socket */ + sco_conn_lock(conn); + sk = conn->sk; + if (sk) + sock_hold(sk); + sco_conn_unlock(conn); + + if (sk) { + lock_sock(sk); + sco_sock_clear_timer(sk); + sco_chan_del(sk, err); + release_sock(sk); + sock_put(sk); + } + + /* Ensure no more work items will run before freeing conn. */ + cancel_delayed_work_sync(&conn->timeout_work); + + hcon->sco_data = NULL; + kfree(conn); +} + +static void __sco_chan_add(struct sco_conn *conn, struct sock *sk, + struct sock *parent) +{ + BT_DBG("conn %p", conn); + + sco_pi(sk)->conn = conn; + conn->sk = sk; + + if (parent) + bt_accept_enqueue(parent, sk, true); +} + +static int sco_chan_add(struct sco_conn *conn, struct sock *sk, + struct sock *parent) +{ + int err = 0; + + sco_conn_lock(conn); + if (conn->sk) + err = -EBUSY; + else + __sco_chan_add(conn, sk, parent); + + sco_conn_unlock(conn); + return err; +} + +static int sco_connect(struct sock *sk) +{ + struct sco_conn *conn; + struct hci_conn *hcon; + struct hci_dev *hdev; + int err, type; + + BT_DBG("%pMR -> %pMR", &sco_pi(sk)->src, &sco_pi(sk)->dst); + + hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR); + if (!hdev) + return -EHOSTUNREACH; + + hci_dev_lock(hdev); + + if (lmp_esco_capable(hdev) && !disable_esco) + type = ESCO_LINK; + else + type = SCO_LINK; + + if (sco_pi(sk)->setting == BT_VOICE_TRANSPARENT && + (!lmp_transp_capable(hdev) || !lmp_esco_capable(hdev))) { + err = -EOPNOTSUPP; + goto unlock; + } + + hcon = hci_connect_sco(hdev, type, &sco_pi(sk)->dst, + sco_pi(sk)->setting, &sco_pi(sk)->codec); + if (IS_ERR(hcon)) { + err = PTR_ERR(hcon); + goto unlock; + } + + conn = sco_conn_add(hcon); + if (!conn) { + hci_conn_drop(hcon); + err = -ENOMEM; + goto unlock; + } + + lock_sock(sk); + + err = sco_chan_add(conn, sk, NULL); + if (err) { + release_sock(sk); + goto unlock; + } + + /* Update source addr of the socket */ + bacpy(&sco_pi(sk)->src, &hcon->src); + + if (hcon->state == BT_CONNECTED) { + sco_sock_clear_timer(sk); + sk->sk_state = BT_CONNECTED; + } else { + sk->sk_state = BT_CONNECT; + sco_sock_set_timer(sk, sk->sk_sndtimeo); + } + + release_sock(sk); + +unlock: + hci_dev_unlock(hdev); + hci_dev_put(hdev); + return err; +} + +static int sco_send_frame(struct sock *sk, struct sk_buff *skb) +{ + struct sco_conn *conn = sco_pi(sk)->conn; + int len = skb->len; + + /* Check outgoing MTU */ + if (len > conn->mtu) + return -EINVAL; + + BT_DBG("sk %p len %d", sk, len); + + hci_send_sco(conn->hcon, skb); + + return len; +} + +static void sco_recv_frame(struct sco_conn *conn, struct sk_buff *skb) +{ + struct sock *sk; + + sco_conn_lock(conn); + sk = conn->sk; + sco_conn_unlock(conn); + + if (!sk) + goto drop; + + BT_DBG("sk %p len %u", sk, skb->len); + + if (sk->sk_state != BT_CONNECTED) + goto drop; + + if (!sock_queue_rcv_skb(sk, skb)) + return; + +drop: + kfree_skb(skb); +} + +/* -------- Socket interface ---------- */ +static struct sock *__sco_get_sock_listen_by_addr(bdaddr_t *ba) +{ + struct sock *sk; + + sk_for_each(sk, &sco_sk_list.head) { + if (sk->sk_state != BT_LISTEN) + continue; + + if (!bacmp(&sco_pi(sk)->src, ba)) + return sk; + } + + return NULL; +} + +/* Find socket listening on source bdaddr. + * Returns closest match. + */ +static struct sock *sco_get_sock_listen(bdaddr_t *src) +{ + struct sock *sk = NULL, *sk1 = NULL; + + read_lock(&sco_sk_list.lock); + + sk_for_each(sk, &sco_sk_list.head) { + if (sk->sk_state != BT_LISTEN) + continue; + + /* Exact match. */ + if (!bacmp(&sco_pi(sk)->src, src)) + break; + + /* Closest match */ + if (!bacmp(&sco_pi(sk)->src, BDADDR_ANY)) + sk1 = sk; + } + + read_unlock(&sco_sk_list.lock); + + return sk ? sk : sk1; +} + +static void sco_sock_destruct(struct sock *sk) +{ + BT_DBG("sk %p", sk); + + skb_queue_purge(&sk->sk_receive_queue); + skb_queue_purge(&sk->sk_write_queue); +} + +static void sco_sock_cleanup_listen(struct sock *parent) +{ + struct sock *sk; + + BT_DBG("parent %p", parent); + + /* Close not yet accepted channels */ + while ((sk = bt_accept_dequeue(parent, NULL))) { + sco_sock_close(sk); + sco_sock_kill(sk); + } + + parent->sk_state = BT_CLOSED; + sock_set_flag(parent, SOCK_ZAPPED); +} + +/* Kill socket (only if zapped and orphan) + * Must be called on unlocked socket. + */ +static void sco_sock_kill(struct sock *sk) +{ + if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) + return; + + BT_DBG("sk %p state %d", sk, sk->sk_state); + + /* Kill poor orphan */ + bt_sock_unlink(&sco_sk_list, sk); + sock_set_flag(sk, SOCK_DEAD); + sock_put(sk); +} + +static void __sco_sock_close(struct sock *sk) +{ + BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); + + switch (sk->sk_state) { + case BT_LISTEN: + sco_sock_cleanup_listen(sk); + break; + + case BT_CONNECTED: + case BT_CONFIG: + if (sco_pi(sk)->conn->hcon) { + sk->sk_state = BT_DISCONN; + sco_sock_set_timer(sk, SCO_DISCONN_TIMEOUT); + sco_conn_lock(sco_pi(sk)->conn); + hci_conn_drop(sco_pi(sk)->conn->hcon); + sco_pi(sk)->conn->hcon = NULL; + sco_conn_unlock(sco_pi(sk)->conn); + } else + sco_chan_del(sk, ECONNRESET); + break; + + case BT_CONNECT2: + case BT_CONNECT: + case BT_DISCONN: + sco_chan_del(sk, ECONNRESET); + break; + + default: + sock_set_flag(sk, SOCK_ZAPPED); + break; + } + +} + +/* Must be called on unlocked socket. */ +static void sco_sock_close(struct sock *sk) +{ + lock_sock(sk); + sco_sock_clear_timer(sk); + __sco_sock_close(sk); + release_sock(sk); +} + +static void sco_sock_init(struct sock *sk, struct sock *parent) +{ + BT_DBG("sk %p", sk); + + if (parent) { + sk->sk_type = parent->sk_type; + bt_sk(sk)->flags = bt_sk(parent)->flags; + security_sk_clone(parent, sk); + } +} + +static struct proto sco_proto = { + .name = "SCO", + .owner = THIS_MODULE, + .obj_size = sizeof(struct sco_pinfo) +}; + +static struct sock *sco_sock_alloc(struct net *net, struct socket *sock, + int proto, gfp_t prio, int kern) +{ + struct sock *sk; + + sk = bt_sock_alloc(net, sock, &sco_proto, proto, prio, kern); + if (!sk) + return NULL; + + sk->sk_destruct = sco_sock_destruct; + sk->sk_sndtimeo = SCO_CONN_TIMEOUT; + + sco_pi(sk)->setting = BT_VOICE_CVSD_16BIT; + sco_pi(sk)->codec.id = BT_CODEC_CVSD; + sco_pi(sk)->codec.cid = 0xffff; + sco_pi(sk)->codec.vid = 0xffff; + sco_pi(sk)->codec.data_path = 0x00; + + bt_sock_link(&sco_sk_list, sk); + return sk; +} + +static int sco_sock_create(struct net *net, struct socket *sock, int protocol, + int kern) +{ + struct sock *sk; + + BT_DBG("sock %p", sock); + + sock->state = SS_UNCONNECTED; + + if (sock->type != SOCK_SEQPACKET) + return -ESOCKTNOSUPPORT; + + sock->ops = &sco_sock_ops; + + sk = sco_sock_alloc(net, sock, protocol, GFP_ATOMIC, kern); + if (!sk) + return -ENOMEM; + + sco_sock_init(sk, NULL); + return 0; +} + +static int sco_sock_bind(struct socket *sock, struct sockaddr *addr, + int addr_len) +{ + struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; + struct sock *sk = sock->sk; + int err = 0; + + if (!addr || addr_len < sizeof(struct sockaddr_sco) || + addr->sa_family != AF_BLUETOOTH) + return -EINVAL; + + BT_DBG("sk %p %pMR", sk, &sa->sco_bdaddr); + + lock_sock(sk); + + if (sk->sk_state != BT_OPEN) { + err = -EBADFD; + goto done; + } + + if (sk->sk_type != SOCK_SEQPACKET) { + err = -EINVAL; + goto done; + } + + bacpy(&sco_pi(sk)->src, &sa->sco_bdaddr); + + sk->sk_state = BT_BOUND; + +done: + release_sock(sk); + return err; +} + +static int sco_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) +{ + struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; + struct sock *sk = sock->sk; + int err; + + BT_DBG("sk %p", sk); + + if (alen < sizeof(struct sockaddr_sco) || + addr->sa_family != AF_BLUETOOTH) + return -EINVAL; + + if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) + return -EBADFD; + + if (sk->sk_type != SOCK_SEQPACKET) + err = -EINVAL; + + lock_sock(sk); + /* Set destination address and psm */ + bacpy(&sco_pi(sk)->dst, &sa->sco_bdaddr); + release_sock(sk); + + err = sco_connect(sk); + if (err) + return err; + + lock_sock(sk); + + err = bt_sock_wait_state(sk, BT_CONNECTED, + sock_sndtimeo(sk, flags & O_NONBLOCK)); + + release_sock(sk); + return err; +} + +static int sco_sock_listen(struct socket *sock, int backlog) +{ + struct sock *sk = sock->sk; + bdaddr_t *src = &sco_pi(sk)->src; + int err = 0; + + BT_DBG("sk %p backlog %d", sk, backlog); + + lock_sock(sk); + + if (sk->sk_state != BT_BOUND) { + err = -EBADFD; + goto done; + } + + if (sk->sk_type != SOCK_SEQPACKET) { + err = -EINVAL; + goto done; + } + + write_lock(&sco_sk_list.lock); + + if (__sco_get_sock_listen_by_addr(src)) { + err = -EADDRINUSE; + goto unlock; + } + + sk->sk_max_ack_backlog = backlog; + sk->sk_ack_backlog = 0; + + sk->sk_state = BT_LISTEN; + +unlock: + write_unlock(&sco_sk_list.lock); + +done: + release_sock(sk); + return err; +} + +static int sco_sock_accept(struct socket *sock, struct socket *newsock, + int flags, bool kern) +{ + DEFINE_WAIT_FUNC(wait, woken_wake_function); + struct sock *sk = sock->sk, *ch; + long timeo; + int err = 0; + + lock_sock(sk); + + timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); + + BT_DBG("sk %p timeo %ld", sk, timeo); + + /* Wait for an incoming connection. (wake-one). */ + add_wait_queue_exclusive(sk_sleep(sk), &wait); + while (1) { + if (sk->sk_state != BT_LISTEN) { + err = -EBADFD; + break; + } + + ch = bt_accept_dequeue(sk, newsock); + if (ch) + break; + + if (!timeo) { + err = -EAGAIN; + break; + } + + if (signal_pending(current)) { + err = sock_intr_errno(timeo); + break; + } + + release_sock(sk); + + timeo = wait_woken(&wait, TASK_INTERRUPTIBLE, timeo); + lock_sock(sk); + } + remove_wait_queue(sk_sleep(sk), &wait); + + if (err) + goto done; + + newsock->state = SS_CONNECTED; + + BT_DBG("new socket %p", ch); + +done: + release_sock(sk); + return err; +} + +static int sco_sock_getname(struct socket *sock, struct sockaddr *addr, + int peer) +{ + struct sockaddr_sco *sa = (struct sockaddr_sco *) addr; + struct sock *sk = sock->sk; + + BT_DBG("sock %p, sk %p", sock, sk); + + addr->sa_family = AF_BLUETOOTH; + + if (peer) + bacpy(&sa->sco_bdaddr, &sco_pi(sk)->dst); + else + bacpy(&sa->sco_bdaddr, &sco_pi(sk)->src); + + return sizeof(struct sockaddr_sco); +} + +static int sco_sock_sendmsg(struct socket *sock, struct msghdr *msg, + size_t len) +{ + struct sock *sk = sock->sk; + struct sk_buff *skb; + int err; + + BT_DBG("sock %p, sk %p", sock, sk); + + err = sock_error(sk); + if (err) + return err; + + if (msg->msg_flags & MSG_OOB) + return -EOPNOTSUPP; + + skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0); + if (IS_ERR(skb)) + return PTR_ERR(skb); + + lock_sock(sk); + + if (sk->sk_state == BT_CONNECTED) + err = sco_send_frame(sk, skb); + else + err = -ENOTCONN; + + release_sock(sk); + + if (err < 0) + kfree_skb(skb); + return err; +} + +static void sco_conn_defer_accept(struct hci_conn *conn, u16 setting) +{ + struct hci_dev *hdev = conn->hdev; + + BT_DBG("conn %p", conn); + + conn->state = BT_CONFIG; + + if (!lmp_esco_capable(hdev)) { + struct hci_cp_accept_conn_req cp; + + bacpy(&cp.bdaddr, &conn->dst); + cp.role = 0x00; /* Ignored */ + + hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp); + } else { + struct hci_cp_accept_sync_conn_req cp; + + bacpy(&cp.bdaddr, &conn->dst); + cp.pkt_type = cpu_to_le16(conn->pkt_type); + + cp.tx_bandwidth = cpu_to_le32(0x00001f40); + cp.rx_bandwidth = cpu_to_le32(0x00001f40); + cp.content_format = cpu_to_le16(setting); + + switch (setting & SCO_AIRMODE_MASK) { + case SCO_AIRMODE_TRANSP: + if (conn->pkt_type & ESCO_2EV3) + cp.max_latency = cpu_to_le16(0x0008); + else + cp.max_latency = cpu_to_le16(0x000D); + cp.retrans_effort = 0x02; + break; + case SCO_AIRMODE_CVSD: + cp.max_latency = cpu_to_le16(0xffff); + cp.retrans_effort = 0xff; + break; + default: + /* use CVSD settings as fallback */ + cp.max_latency = cpu_to_le16(0xffff); + cp.retrans_effort = 0xff; + break; + } + + hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, + sizeof(cp), &cp); + } +} + +static int sco_sock_recvmsg(struct socket *sock, struct msghdr *msg, + size_t len, int flags) +{ + struct sock *sk = sock->sk; + struct sco_pinfo *pi = sco_pi(sk); + + lock_sock(sk); + + if (sk->sk_state == BT_CONNECT2 && + test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags)) { + sco_conn_defer_accept(pi->conn->hcon, pi->setting); + sk->sk_state = BT_CONFIG; + + release_sock(sk); + return 0; + } + + release_sock(sk); + + return bt_sock_recvmsg(sock, msg, len, flags); +} + +static int sco_sock_setsockopt(struct socket *sock, int level, int optname, + sockptr_t optval, unsigned int optlen) +{ + struct sock *sk = sock->sk; + int len, err = 0; + struct bt_voice voice; + u32 opt; + struct bt_codecs *codecs; + struct hci_dev *hdev; + __u8 buffer[255]; + + BT_DBG("sk %p", sk); + + lock_sock(sk); + + switch (optname) { + + case BT_DEFER_SETUP: + if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { + err = -EINVAL; + break; + } + + if (copy_from_sockptr(&opt, optval, sizeof(u32))) { + err = -EFAULT; + break; + } + + if (opt) + set_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); + else + clear_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags); + break; + + case BT_VOICE: + if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && + sk->sk_state != BT_CONNECT2) { + err = -EINVAL; + break; + } + + voice.setting = sco_pi(sk)->setting; + + len = min_t(unsigned int, sizeof(voice), optlen); + if (copy_from_sockptr(&voice, optval, len)) { + err = -EFAULT; + break; + } + + /* Explicitly check for these values */ + if (voice.setting != BT_VOICE_TRANSPARENT && + voice.setting != BT_VOICE_CVSD_16BIT) { + err = -EINVAL; + break; + } + + sco_pi(sk)->setting = voice.setting; + hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, + BDADDR_BREDR); + if (!hdev) { + err = -EBADFD; + break; + } + if (enhanced_sync_conn_capable(hdev) && + voice.setting == BT_VOICE_TRANSPARENT) + sco_pi(sk)->codec.id = BT_CODEC_TRANSPARENT; + hci_dev_put(hdev); + break; + + case BT_PKT_STATUS: + if (copy_from_sockptr(&opt, optval, sizeof(u32))) { + err = -EFAULT; + break; + } + + if (opt) + set_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); + else + clear_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags); + break; + + case BT_CODEC: + if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND && + sk->sk_state != BT_CONNECT2) { + err = -EINVAL; + break; + } + + hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, + BDADDR_BREDR); + if (!hdev) { + err = -EBADFD; + break; + } + + if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) { + hci_dev_put(hdev); + err = -EOPNOTSUPP; + break; + } + + if (!hdev->get_data_path_id) { + hci_dev_put(hdev); + err = -EOPNOTSUPP; + break; + } + + if (optlen < sizeof(struct bt_codecs) || + optlen > sizeof(buffer)) { + hci_dev_put(hdev); + err = -EINVAL; + break; + } + + if (copy_from_sockptr(buffer, optval, optlen)) { + hci_dev_put(hdev); + err = -EFAULT; + break; + } + + codecs = (void *)buffer; + + if (codecs->num_codecs > 1) { + hci_dev_put(hdev); + err = -EINVAL; + break; + } + + sco_pi(sk)->codec = codecs->codecs[0]; + hci_dev_put(hdev); + break; + + default: + err = -ENOPROTOOPT; + break; + } + + release_sock(sk); + return err; +} + +static int sco_sock_getsockopt_old(struct socket *sock, int optname, + char __user *optval, int __user *optlen) +{ + struct sock *sk = sock->sk; + struct sco_options opts; + struct sco_conninfo cinfo; + int len, err = 0; + + BT_DBG("sk %p", sk); + + if (get_user(len, optlen)) + return -EFAULT; + + lock_sock(sk); + + switch (optname) { + case SCO_OPTIONS: + if (sk->sk_state != BT_CONNECTED && + !(sk->sk_state == BT_CONNECT2 && + test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { + err = -ENOTCONN; + break; + } + + opts.mtu = sco_pi(sk)->conn->mtu; + + BT_DBG("mtu %u", opts.mtu); + + len = min_t(unsigned int, len, sizeof(opts)); + if (copy_to_user(optval, (char *)&opts, len)) + err = -EFAULT; + + break; + + case SCO_CONNINFO: + if (sk->sk_state != BT_CONNECTED && + !(sk->sk_state == BT_CONNECT2 && + test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags))) { + err = -ENOTCONN; + break; + } + + memset(&cinfo, 0, sizeof(cinfo)); + cinfo.hci_handle = sco_pi(sk)->conn->hcon->handle; + memcpy(cinfo.dev_class, sco_pi(sk)->conn->hcon->dev_class, 3); + + len = min_t(unsigned int, len, sizeof(cinfo)); + if (copy_to_user(optval, (char *)&cinfo, len)) + err = -EFAULT; + + break; + + default: + err = -ENOPROTOOPT; + break; + } + + release_sock(sk); + return err; +} + +static int sco_sock_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *optlen) +{ + struct sock *sk = sock->sk; + int len, err = 0; + struct bt_voice voice; + u32 phys; + int buf_len; + struct codec_list *c; + u8 num_codecs, i, __user *ptr; + struct hci_dev *hdev; + struct hci_codec_caps *caps; + struct bt_codec codec; + + BT_DBG("sk %p", sk); + + if (level == SOL_SCO) + return sco_sock_getsockopt_old(sock, optname, optval, optlen); + + if (get_user(len, optlen)) + return -EFAULT; + + lock_sock(sk); + + switch (optname) { + + case BT_DEFER_SETUP: + if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { + err = -EINVAL; + break; + } + + if (put_user(test_bit(BT_SK_DEFER_SETUP, &bt_sk(sk)->flags), + (u32 __user *)optval)) + err = -EFAULT; + + break; + + case BT_VOICE: + voice.setting = sco_pi(sk)->setting; + + len = min_t(unsigned int, len, sizeof(voice)); + if (copy_to_user(optval, (char *)&voice, len)) + err = -EFAULT; + + break; + + case BT_PHY: + if (sk->sk_state != BT_CONNECTED) { + err = -ENOTCONN; + break; + } + + phys = hci_conn_get_phy(sco_pi(sk)->conn->hcon); + + if (put_user(phys, (u32 __user *) optval)) + err = -EFAULT; + break; + + case BT_PKT_STATUS: + if (put_user(test_bit(BT_SK_PKT_STATUS, &bt_sk(sk)->flags), + (int __user *)optval)) + err = -EFAULT; + break; + + case BT_SNDMTU: + case BT_RCVMTU: + if (sk->sk_state != BT_CONNECTED) { + err = -ENOTCONN; + break; + } + + if (put_user(sco_pi(sk)->conn->mtu, (u32 __user *)optval)) + err = -EFAULT; + break; + + case BT_CODEC: + num_codecs = 0; + buf_len = 0; + + hdev = hci_get_route(&sco_pi(sk)->dst, &sco_pi(sk)->src, BDADDR_BREDR); + if (!hdev) { + err = -EBADFD; + break; + } + + if (!hci_dev_test_flag(hdev, HCI_OFFLOAD_CODECS_ENABLED)) { + hci_dev_put(hdev); + err = -EOPNOTSUPP; + break; + } + + if (!hdev->get_data_path_id) { + hci_dev_put(hdev); + err = -EOPNOTSUPP; + break; + } + + release_sock(sk); + + /* find total buffer size required to copy codec + caps */ + hci_dev_lock(hdev); + list_for_each_entry(c, &hdev->local_codecs, list) { + if (c->transport != HCI_TRANSPORT_SCO_ESCO) + continue; + num_codecs++; + for (i = 0, caps = c->caps; i < c->num_caps; i++) { + buf_len += 1 + caps->len; + caps = (void *)&caps->data[caps->len]; + } + buf_len += sizeof(struct bt_codec); + } + hci_dev_unlock(hdev); + + buf_len += sizeof(struct bt_codecs); + if (buf_len > len) { + hci_dev_put(hdev); + return -ENOBUFS; + } + ptr = optval; + + if (put_user(num_codecs, ptr)) { + hci_dev_put(hdev); + return -EFAULT; + } + ptr += sizeof(num_codecs); + + /* Iterate all the codecs supported over SCO and populate + * codec data + */ + hci_dev_lock(hdev); + list_for_each_entry(c, &hdev->local_codecs, list) { + if (c->transport != HCI_TRANSPORT_SCO_ESCO) + continue; + + codec.id = c->id; + codec.cid = c->cid; + codec.vid = c->vid; + err = hdev->get_data_path_id(hdev, &codec.data_path); + if (err < 0) + break; + codec.num_caps = c->num_caps; + if (copy_to_user(ptr, &codec, sizeof(codec))) { + err = -EFAULT; + break; + } + ptr += sizeof(codec); + + /* find codec capabilities data length */ + len = 0; + for (i = 0, caps = c->caps; i < c->num_caps; i++) { + len += 1 + caps->len; + caps = (void *)&caps->data[caps->len]; + } + + /* copy codec capabilities data */ + if (len && copy_to_user(ptr, c->caps, len)) { + err = -EFAULT; + break; + } + ptr += len; + } + + hci_dev_unlock(hdev); + hci_dev_put(hdev); + + lock_sock(sk); + + if (!err && put_user(buf_len, optlen)) + err = -EFAULT; + + break; + + default: + err = -ENOPROTOOPT; + break; + } + + release_sock(sk); + return err; +} + +static int sco_sock_shutdown(struct socket *sock, int how) +{ + struct sock *sk = sock->sk; + int err = 0; + + BT_DBG("sock %p, sk %p", sock, sk); + + if (!sk) + return 0; + + sock_hold(sk); + lock_sock(sk); + + if (!sk->sk_shutdown) { + sk->sk_shutdown = SHUTDOWN_MASK; + sco_sock_clear_timer(sk); + __sco_sock_close(sk); + + if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime && + !(current->flags & PF_EXITING)) + err = bt_sock_wait_state(sk, BT_CLOSED, + sk->sk_lingertime); + } + + release_sock(sk); + sock_put(sk); + + return err; +} + +static int sco_sock_release(struct socket *sock) +{ + struct sock *sk = sock->sk; + int err = 0; + + BT_DBG("sock %p, sk %p", sock, sk); + + if (!sk) + return 0; + + sco_sock_close(sk); + + if (sock_flag(sk, SOCK_LINGER) && READ_ONCE(sk->sk_lingertime) && + !(current->flags & PF_EXITING)) { + lock_sock(sk); + err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); + release_sock(sk); + } + + sock_orphan(sk); + sco_sock_kill(sk); + return err; +} + +static void sco_conn_ready(struct sco_conn *conn) +{ + struct sock *parent; + struct sock *sk = conn->sk; + + BT_DBG("conn %p", conn); + + if (sk) { + lock_sock(sk); + sco_sock_clear_timer(sk); + sk->sk_state = BT_CONNECTED; + sk->sk_state_change(sk); + release_sock(sk); + } else { + sco_conn_lock(conn); + + if (!conn->hcon) { + sco_conn_unlock(conn); + return; + } + + parent = sco_get_sock_listen(&conn->hcon->src); + if (!parent) { + sco_conn_unlock(conn); + return; + } + + lock_sock(parent); + + sk = sco_sock_alloc(sock_net(parent), NULL, + BTPROTO_SCO, GFP_ATOMIC, 0); + if (!sk) { + release_sock(parent); + sco_conn_unlock(conn); + return; + } + + sco_sock_init(sk, parent); + + bacpy(&sco_pi(sk)->src, &conn->hcon->src); + bacpy(&sco_pi(sk)->dst, &conn->hcon->dst); + + hci_conn_hold(conn->hcon); + __sco_chan_add(conn, sk, parent); + + if (test_bit(BT_SK_DEFER_SETUP, &bt_sk(parent)->flags)) + sk->sk_state = BT_CONNECT2; + else + sk->sk_state = BT_CONNECTED; + + /* Wake up parent */ + parent->sk_data_ready(parent); + + release_sock(parent); + + sco_conn_unlock(conn); + } +} + +/* ----- SCO interface with lower layer (HCI) ----- */ +int sco_connect_ind(struct hci_dev *hdev, bdaddr_t *bdaddr, __u8 *flags) +{ + struct sock *sk; + int lm = 0; + + BT_DBG("hdev %s, bdaddr %pMR", hdev->name, bdaddr); + + /* Find listening sockets */ + read_lock(&sco_sk_list.lock); + sk_for_each(sk, &sco_sk_list.head) { + if (sk->sk_state != BT_LISTEN) + continue; + + if (!bacmp(&sco_pi(sk)->src, &hdev->bdaddr) || + !bacmp(&sco_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(&sco_sk_list.lock); + + return lm; +} + +static void sco_connect_cfm(struct hci_conn *hcon, __u8 status) +{ + if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) + return; + + BT_DBG("hcon %p bdaddr %pMR status %u", hcon, &hcon->dst, status); + + if (!status) { + struct sco_conn *conn; + + conn = sco_conn_add(hcon); + if (conn) + sco_conn_ready(conn); + } else + sco_conn_del(hcon, bt_to_errno(status)); +} + +static void sco_disconn_cfm(struct hci_conn *hcon, __u8 reason) +{ + if (hcon->type != SCO_LINK && hcon->type != ESCO_LINK) + return; + + BT_DBG("hcon %p reason %d", hcon, reason); + + sco_conn_del(hcon, bt_to_errno(reason)); +} + +void sco_recv_scodata(struct hci_conn *hcon, struct sk_buff *skb) +{ + struct sco_conn *conn = hcon->sco_data; + + if (!conn) + goto drop; + + BT_DBG("conn %p len %u", conn, skb->len); + + if (skb->len) { + sco_recv_frame(conn, skb); + return; + } + +drop: + kfree_skb(skb); +} + +static struct hci_cb sco_cb = { + .name = "SCO", + .connect_cfm = sco_connect_cfm, + .disconn_cfm = sco_disconn_cfm, +}; + +static int sco_debugfs_show(struct seq_file *f, void *p) +{ + struct sock *sk; + + read_lock(&sco_sk_list.lock); + + sk_for_each(sk, &sco_sk_list.head) { + seq_printf(f, "%pMR %pMR %d\n", &sco_pi(sk)->src, + &sco_pi(sk)->dst, sk->sk_state); + } + + read_unlock(&sco_sk_list.lock); + + return 0; +} + +DEFINE_SHOW_ATTRIBUTE(sco_debugfs); + +static struct dentry *sco_debugfs; + +static const struct proto_ops sco_sock_ops = { + .family = PF_BLUETOOTH, + .owner = THIS_MODULE, + .release = sco_sock_release, + .bind = sco_sock_bind, + .connect = sco_sock_connect, + .listen = sco_sock_listen, + .accept = sco_sock_accept, + .getname = sco_sock_getname, + .sendmsg = sco_sock_sendmsg, + .recvmsg = sco_sock_recvmsg, + .poll = bt_sock_poll, + .ioctl = bt_sock_ioctl, + .gettstamp = sock_gettstamp, + .mmap = sock_no_mmap, + .socketpair = sock_no_socketpair, + .shutdown = sco_sock_shutdown, + .setsockopt = sco_sock_setsockopt, + .getsockopt = sco_sock_getsockopt +}; + +static const struct net_proto_family sco_sock_family_ops = { + .family = PF_BLUETOOTH, + .owner = THIS_MODULE, + .create = sco_sock_create, +}; + +int __init sco_init(void) +{ + int err; + + BUILD_BUG_ON(sizeof(struct sockaddr_sco) > sizeof(struct sockaddr)); + + err = proto_register(&sco_proto, 0); + if (err < 0) + return err; + + err = bt_sock_register(BTPROTO_SCO, &sco_sock_family_ops); + if (err < 0) { + BT_ERR("SCO socket registration failed"); + goto error; + } + + err = bt_procfs_init(&init_net, "sco", &sco_sk_list, NULL); + if (err < 0) { + BT_ERR("Failed to create SCO proc file"); + bt_sock_unregister(BTPROTO_SCO); + goto error; + } + + BT_INFO("SCO socket layer initialized"); + + hci_register_cb(&sco_cb); + + if (IS_ERR_OR_NULL(bt_debugfs)) + return 0; + + sco_debugfs = debugfs_create_file("sco", 0444, bt_debugfs, + NULL, &sco_debugfs_fops); + + return 0; + +error: + proto_unregister(&sco_proto); + return err; +} + +void sco_exit(void) +{ + bt_procfs_cleanup(&init_net, "sco"); + + debugfs_remove(sco_debugfs); + + hci_unregister_cb(&sco_cb); + + bt_sock_unregister(BTPROTO_SCO); + + proto_unregister(&sco_proto); +} + +module_param(disable_esco, bool, 0644); +MODULE_PARM_DESC(disable_esco, "Disable eSCO connection creation"); |