diff options
Diffstat (limited to 'net/bluetooth_tizen/rfcomm/sock.c')
-rw-r--r-- | net/bluetooth_tizen/rfcomm/sock.c | 1078 |
1 files changed, 0 insertions, 1078 deletions
diff --git a/net/bluetooth_tizen/rfcomm/sock.c b/net/bluetooth_tizen/rfcomm/sock.c deleted file mode 100644 index 22169c3..0000000 --- a/net/bluetooth_tizen/rfcomm/sock.c +++ /dev/null @@ -1,1078 +0,0 @@ -/* - RFCOMM implementation for Linux Bluetooth stack (BlueZ). - Copyright (C) 2002 Maxim Krasnyansky <maxk@qualcomm.com> - Copyright (C) 2002 Marcel Holtmann <marcel@holtmann.org> - - 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. -*/ - -/* - * RFCOMM sockets. - */ - -#include <linux/module.h> - -#include <linux/types.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/poll.h> -#include <linux/fcntl.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/socket.h> -#include <linux/skbuff.h> -#include <linux/list.h> -#include <linux/device.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/security.h> -#include <net/sock.h> - -#include <asm/system.h> -#include <linux/uaccess.h> - -#include <net/bluetooth/bluetooth.h> -#include <net/bluetooth/hci_core.h> -#include <net/bluetooth/l2cap.h> -#include <net/bluetooth/rfcomm.h> - -static const struct proto_ops rfcomm_sock_ops; - -static struct bt_sock_list rfcomm_sk_list = { - .lock = __RW_LOCK_UNLOCKED(rfcomm_sk_list.lock) -}; - -static void rfcomm_sock_close(struct sock *sk); -static void rfcomm_sock_kill(struct sock *sk); - -/* ---- DLC callbacks ---- - * - * called under rfcomm_dlc_lock() - */ -static void rfcomm_sk_data_ready(struct rfcomm_dlc *d, struct sk_buff *skb) -{ - struct sock *sk = d->owner; - if (!sk) - return; - - atomic_add(skb->len, &sk->sk_rmem_alloc); - skb_queue_tail(&sk->sk_receive_queue, skb); - sk->sk_data_ready(sk, skb->len); - - if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_rcvbuf) - rfcomm_dlc_throttle(d); -} - -static void rfcomm_sk_state_change(struct rfcomm_dlc *d, int err) -{ - struct sock *sk = d->owner, *parent; - unsigned long flags; - - if (!sk) - return; - - BT_DBG("dlc %p state %ld err %d", d, d->state, err); - - local_irq_save(flags); - bh_lock_sock(sk); - - if (err) - sk->sk_err = err; - - sk->sk_state = d->state; - - parent = bt_sk(sk)->parent; - if (parent) { - if (d->state == BT_CLOSED) { - sock_set_flag(sk, SOCK_ZAPPED); - bt_accept_unlink(sk); - } - parent->sk_data_ready(parent, 0); - } else { - if (d->state == BT_CONNECTED) - rfcomm_session_getaddr(d->session, &bt_sk(sk)->src, NULL); - sk->sk_state_change(sk); - } - - bh_unlock_sock(sk); - local_irq_restore(flags); - - if (parent && sock_flag(sk, SOCK_ZAPPED)) { - /* We have to drop DLC lock here, otherwise - * rfcomm_sock_destruct() will dead lock. */ - rfcomm_dlc_unlock(d); - rfcomm_sock_kill(sk); - rfcomm_dlc_lock(d); - } -} - -/* ---- Socket functions ---- */ -static struct sock *__rfcomm_get_sock_by_addr(u8 channel, bdaddr_t *src) -{ - struct sock *sk = NULL; - struct hlist_node *node; - - sk_for_each(sk, node, &rfcomm_sk_list.head) { - if (rfcomm_pi(sk)->channel == channel && - !bacmp(&bt_sk(sk)->src, src)) - break; - } - - return node ? sk : NULL; -} - -/* Find socket with channel and source bdaddr. - * Returns closest match. - */ -static struct sock *rfcomm_get_sock_by_channel(int state, u8 channel, bdaddr_t *src) -{ - struct sock *sk = NULL, *sk1 = NULL; - struct hlist_node *node; - - read_lock(&rfcomm_sk_list.lock); - - sk_for_each(sk, node, &rfcomm_sk_list.head) { - if (state && sk->sk_state != state) - continue; - - if (rfcomm_pi(sk)->channel == channel) { - /* Exact match. */ - if (!bacmp(&bt_sk(sk)->src, src)) - break; - - /* Closest match */ - if (!bacmp(&bt_sk(sk)->src, BDADDR_ANY)) - sk1 = sk; - } - } - - read_unlock(&rfcomm_sk_list.lock); - - return node ? sk : sk1; -} - -static void rfcomm_sock_destruct(struct sock *sk) -{ - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - - BT_DBG("sk %p dlc %p", sk, d); - - skb_queue_purge(&sk->sk_receive_queue); - skb_queue_purge(&sk->sk_write_queue); - - rfcomm_dlc_lock(d); - rfcomm_pi(sk)->dlc = NULL; - - /* Detach DLC if it's owned by this socket */ - if (d->owner == sk) - d->owner = NULL; - rfcomm_dlc_unlock(d); - - rfcomm_dlc_put(d); -} - -static void rfcomm_sock_cleanup_listen(struct sock *parent) -{ - struct sock *sk; - - BT_DBG("parent %p", parent); - - /* Close not yet accepted dlcs */ - while ((sk = bt_accept_dequeue(parent, NULL))) { - rfcomm_sock_close(sk); - rfcomm_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 rfcomm_sock_kill(struct sock *sk) -{ - if (!sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket) - return; - - BT_DBG("sk %p state %d refcnt %d", sk, sk->sk_state, atomic_read(&sk->sk_refcnt)); - - /* Kill poor orphan */ - bt_sock_unlink(&rfcomm_sk_list, sk); - sock_set_flag(sk, SOCK_DEAD); - sock_put(sk); -} - -static void __rfcomm_sock_close(struct sock *sk) -{ - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - - BT_DBG("sk %p state %d socket %p", sk, sk->sk_state, sk->sk_socket); - - switch (sk->sk_state) { - case BT_LISTEN: - rfcomm_sock_cleanup_listen(sk); - break; - - case BT_CONNECT: - case BT_CONNECT2: - case BT_CONFIG: - case BT_CONNECTED: - rfcomm_dlc_close(d, 0); - - default: - sock_set_flag(sk, SOCK_ZAPPED); - break; - } -} - -/* Close socket. - * Must be called on unlocked socket. - */ -static void rfcomm_sock_close(struct sock *sk) -{ - lock_sock(sk); - __rfcomm_sock_close(sk); - release_sock(sk); -} - -static void rfcomm_sock_init(struct sock *sk, struct sock *parent) -{ - struct rfcomm_pinfo *pi = rfcomm_pi(sk); - - BT_DBG("sk %p", sk); - - if (parent) { - sk->sk_type = parent->sk_type; - pi->dlc->defer_setup = bt_sk(parent)->defer_setup; - - pi->sec_level = rfcomm_pi(parent)->sec_level; - pi->role_switch = rfcomm_pi(parent)->role_switch; - - security_sk_clone(parent, sk); - } else { - pi->dlc->defer_setup = 0; - - pi->sec_level = BT_SECURITY_LOW; - pi->role_switch = 0; - } - - pi->dlc->sec_level = pi->sec_level; - pi->dlc->role_switch = pi->role_switch; -} - -static struct proto rfcomm_proto = { - .name = "RFCOMM", - .owner = THIS_MODULE, - .obj_size = sizeof(struct rfcomm_pinfo) -}; - -static struct sock *rfcomm_sock_alloc(struct net *net, struct socket *sock, int proto, gfp_t prio) -{ - struct rfcomm_dlc *d; - struct sock *sk; - - sk = sk_alloc(net, PF_BLUETOOTH, prio, &rfcomm_proto); - if (!sk) - return NULL; - - sock_init_data(sock, sk); - INIT_LIST_HEAD(&bt_sk(sk)->accept_q); - - d = rfcomm_dlc_alloc(prio); - if (!d) { - sk_free(sk); - return NULL; - } - - d->data_ready = rfcomm_sk_data_ready; - d->state_change = rfcomm_sk_state_change; - - rfcomm_pi(sk)->dlc = d; - d->owner = sk; - - sk->sk_destruct = rfcomm_sock_destruct; - sk->sk_sndtimeo = RFCOMM_CONN_TIMEOUT; - - sk->sk_sndbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; - sk->sk_rcvbuf = RFCOMM_MAX_CREDITS * RFCOMM_DEFAULT_MTU * 10; - - sock_reset_flag(sk, SOCK_ZAPPED); - - sk->sk_protocol = proto; - sk->sk_state = BT_OPEN; - - bt_sock_link(&rfcomm_sk_list, sk); - - BT_DBG("sk %p", sk); - return sk; -} - -static int rfcomm_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_STREAM && sock->type != SOCK_RAW) - return -ESOCKTNOSUPPORT; - - sock->ops = &rfcomm_sock_ops; - - sk = rfcomm_sock_alloc(net, sock, protocol, GFP_ATOMIC); - if (!sk) - return -ENOMEM; - - rfcomm_sock_init(sk, NULL); - return 0; -} - -static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) -{ - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; - struct sock *sk = sock->sk; - int err = 0; - - BT_DBG("sk %p %s", sk, batostr(&sa->rc_bdaddr)); - - if (!addr || addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - lock_sock(sk); - - if (sk->sk_state != BT_OPEN) { - err = -EBADFD; - goto done; - } - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - write_lock(&rfcomm_sk_list.lock); - - if (sa->rc_channel && __rfcomm_get_sock_by_addr(sa->rc_channel, &sa->rc_bdaddr)) { - err = -EADDRINUSE; - } else { - /* Save source address */ - bacpy(&bt_sk(sk)->src, &sa->rc_bdaddr); - rfcomm_pi(sk)->channel = sa->rc_channel; - sk->sk_state = BT_BOUND; - } - - write_unlock(&rfcomm_sk_list.lock); - -done: - release_sock(sk); - return err; -} - -static int rfcomm_sock_connect(struct socket *sock, struct sockaddr *addr, int alen, int flags) -{ - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; - struct sock *sk = sock->sk; - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - int err = 0; - - BT_DBG("sk %p", sk); - - if (alen < sizeof(struct sockaddr_rc) || - addr->sa_family != AF_BLUETOOTH) - return -EINVAL; - - lock_sock(sk); - - if (sk->sk_state != BT_OPEN && sk->sk_state != BT_BOUND) { - err = -EBADFD; - goto done; - } - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - sk->sk_state = BT_CONNECT; - bacpy(&bt_sk(sk)->dst, &sa->rc_bdaddr); - rfcomm_pi(sk)->channel = sa->rc_channel; - - d->sec_level = rfcomm_pi(sk)->sec_level; - d->role_switch = rfcomm_pi(sk)->role_switch; - - err = rfcomm_dlc_open(d, &bt_sk(sk)->src, &sa->rc_bdaddr, sa->rc_channel); - if (!err) - err = bt_sock_wait_state(sk, BT_CONNECTED, - sock_sndtimeo(sk, flags & O_NONBLOCK)); - -done: - release_sock(sk); - return err; -} - -static int rfcomm_sock_listen(struct socket *sock, int backlog) -{ - struct sock *sk = sock->sk; - int err = 0; - - BT_DBG("sk %p backlog %d", sk, backlog); - - lock_sock(sk); - - if (sk->sk_state != BT_BOUND) { - err = -EBADFD; - goto done; - } - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - if (!rfcomm_pi(sk)->channel) { - bdaddr_t *src = &bt_sk(sk)->src; - u8 channel; - - err = -EINVAL; - - write_lock(&rfcomm_sk_list.lock); - - for (channel = 1; channel < 31; channel++) - if (!__rfcomm_get_sock_by_addr(channel, src)) { - rfcomm_pi(sk)->channel = channel; - err = 0; - break; - } - - write_unlock(&rfcomm_sk_list.lock); - - if (err < 0) - goto done; - } - - sk->sk_max_ack_backlog = backlog; - sk->sk_ack_backlog = 0; - sk->sk_state = BT_LISTEN; - -done: - release_sock(sk); - return err; -} - -static int rfcomm_sock_accept(struct socket *sock, struct socket *newsock, int flags) -{ - DECLARE_WAITQUEUE(wait, current); - struct sock *sk = sock->sk, *nsk; - long timeo; - int err = 0; - - lock_sock(sk); - - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - goto done; - } - - 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) { - set_current_state(TASK_INTERRUPTIBLE); - - if (sk->sk_state != BT_LISTEN) { - err = -EBADFD; - break; - } - - nsk = bt_accept_dequeue(sk, newsock); - if (nsk) - break; - - if (!timeo) { - err = -EAGAIN; - break; - } - - if (signal_pending(current)) { - err = sock_intr_errno(timeo); - break; - } - - release_sock(sk); - timeo = schedule_timeout(timeo); - lock_sock(sk); - } - __set_current_state(TASK_RUNNING); - remove_wait_queue(sk_sleep(sk), &wait); - - if (err) - goto done; - - newsock->state = SS_CONNECTED; - - BT_DBG("new socket %p", nsk); - -done: - release_sock(sk); - return err; -} - -static int rfcomm_sock_getname(struct socket *sock, struct sockaddr *addr, int *len, int peer) -{ - struct sockaddr_rc *sa = (struct sockaddr_rc *) addr; - struct sock *sk = sock->sk; - - BT_DBG("sock %p, sk %p", sock, sk); - - sa->rc_family = AF_BLUETOOTH; - sa->rc_channel = rfcomm_pi(sk)->channel; - if (peer) - bacpy(&sa->rc_bdaddr, &bt_sk(sk)->dst); - else - bacpy(&sa->rc_bdaddr, &bt_sk(sk)->src); - - *len = sizeof(struct sockaddr_rc); - return 0; -} - -static int rfcomm_sock_sendmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t len) -{ - struct sock *sk = sock->sk; - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - struct sk_buff *skb; - int sent = 0; - - if (test_bit(RFCOMM_DEFER_SETUP, &d->flags)) - return -ENOTCONN; - - if (msg->msg_flags & MSG_OOB) - return -EOPNOTSUPP; - - if (sk->sk_shutdown & SEND_SHUTDOWN) - return -EPIPE; - - BT_DBG("sock %p, sk %p", sock, sk); - - lock_sock(sk); - - while (len) { - size_t size = min_t(size_t, len, d->mtu); - int err; - - skb = sock_alloc_send_skb(sk, size + RFCOMM_SKB_RESERVE, - msg->msg_flags & MSG_DONTWAIT, &err); - if (!skb) { - if (sent == 0) - sent = err; - break; - } - skb_reserve(skb, RFCOMM_SKB_HEAD_RESERVE); - - err = memcpy_fromiovec(skb_put(skb, size), msg->msg_iov, size); - if (err) { - kfree_skb(skb); - if (sent == 0) - sent = err; - break; - } - - skb->priority = sk->sk_priority; - - err = rfcomm_dlc_send(d, skb); - if (err < 0) { - kfree_skb(skb); - if (sent == 0) - sent = err; - break; - } - - sent += size; - len -= size; - } - - release_sock(sk); - - return sent; -} - -static int rfcomm_sock_recvmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t size, int flags) -{ - struct sock *sk = sock->sk; - struct rfcomm_dlc *d = rfcomm_pi(sk)->dlc; - int len; - - if (test_and_clear_bit(RFCOMM_DEFER_SETUP, &d->flags)) { - rfcomm_dlc_accept(d); - return 0; - } - - len = bt_sock_stream_recvmsg(iocb, sock, msg, size, flags); - - lock_sock(sk); - if (!(flags & MSG_PEEK) && len > 0) - atomic_sub(len, &sk->sk_rmem_alloc); - - if (atomic_read(&sk->sk_rmem_alloc) <= (sk->sk_rcvbuf >> 2)) - rfcomm_dlc_unthrottle(rfcomm_pi(sk)->dlc); - release_sock(sk); - - return len; -} - -static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen) -{ - struct sock *sk = sock->sk; - int err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - lock_sock(sk); - - switch (optname) { - case RFCOMM_LM: - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - if (opt & RFCOMM_LM_AUTH) - rfcomm_pi(sk)->sec_level = BT_SECURITY_LOW; - if (opt & RFCOMM_LM_ENCRYPT) - rfcomm_pi(sk)->sec_level = BT_SECURITY_MEDIUM; - if (opt & RFCOMM_LM_SECURE) - rfcomm_pi(sk)->sec_level = BT_SECURITY_HIGH; - - rfcomm_pi(sk)->role_switch = (opt & RFCOMM_LM_MASTER); - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen) -{ - struct sock *sk = sock->sk; - struct bt_security sec; - int err = 0; - size_t len; - u32 opt; - - BT_DBG("sk %p", sk); - - if (level == SOL_RFCOMM) - return rfcomm_sock_setsockopt_old(sock, optname, optval, optlen); - - if (level != SOL_BLUETOOTH) - return -ENOPROTOOPT; - - lock_sock(sk); - - switch (optname) { - case BT_SECURITY: - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - break; - } - - sec.level = BT_SECURITY_LOW; - - len = min_t(unsigned int, sizeof(sec), optlen); - if (copy_from_user((char *) &sec, optval, len)) { - err = -EFAULT; - break; - } - - if (sec.level > BT_SECURITY_HIGH) { - err = -EINVAL; - break; - } - - rfcomm_pi(sk)->sec_level = sec.level; - break; - - case BT_DEFER_SETUP: - if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { - err = -EINVAL; - break; - } - - if (get_user(opt, (u32 __user *) optval)) { - err = -EFAULT; - break; - } - - bt_sk(sk)->defer_setup = opt; - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int rfcomm_sock_getsockopt_old(struct socket *sock, int optname, char __user *optval, int __user *optlen) -{ - struct sock *sk = sock->sk; - struct rfcomm_conninfo cinfo; - struct l2cap_conn *conn = l2cap_pi(sk)->chan->conn; - int len, err = 0; - u32 opt; - - BT_DBG("sk %p", sk); - - if (get_user(len, optlen)) - return -EFAULT; - - lock_sock(sk); - - switch (optname) { - case RFCOMM_LM: - switch (rfcomm_pi(sk)->sec_level) { - case BT_SECURITY_LOW: - opt = RFCOMM_LM_AUTH; - break; - case BT_SECURITY_MEDIUM: - opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT; - break; - case BT_SECURITY_HIGH: - opt = RFCOMM_LM_AUTH | RFCOMM_LM_ENCRYPT | - RFCOMM_LM_SECURE; - break; - default: - opt = 0; - break; - } - - if (rfcomm_pi(sk)->role_switch) - opt |= RFCOMM_LM_MASTER; - - if (put_user(opt, (u32 __user *) optval)) - err = -EFAULT; - break; - - case RFCOMM_CONNINFO: - if (sk->sk_state != BT_CONNECTED && - !rfcomm_pi(sk)->dlc->defer_setup) { - err = -ENOTCONN; - break; - } - - memset(&cinfo, 0, sizeof(cinfo)); - cinfo.hci_handle = conn->hcon->handle; - memcpy(cinfo.dev_class, 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 rfcomm_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) -{ - struct sock *sk = sock->sk; - struct bt_security sec; - int len, err = 0; - - BT_DBG("sk %p", sk); - - if (level == SOL_RFCOMM) - return rfcomm_sock_getsockopt_old(sock, optname, optval, optlen); - - if (level != SOL_BLUETOOTH) - return -ENOPROTOOPT; - - if (get_user(len, optlen)) - return -EFAULT; - - lock_sock(sk); - - switch (optname) { - case BT_SECURITY: - if (sk->sk_type != SOCK_STREAM) { - err = -EINVAL; - break; - } - - sec.level = rfcomm_pi(sk)->sec_level; - - len = min_t(unsigned int, len, sizeof(sec)); - if (copy_to_user(optval, (char *) &sec, len)) - err = -EFAULT; - - break; - - case BT_DEFER_SETUP: - if (sk->sk_state != BT_BOUND && sk->sk_state != BT_LISTEN) { - err = -EINVAL; - break; - } - - if (put_user(bt_sk(sk)->defer_setup, (u32 __user *) optval)) - err = -EFAULT; - - break; - - default: - err = -ENOPROTOOPT; - break; - } - - release_sock(sk); - return err; -} - -static int rfcomm_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) -{ - struct sock *sk __maybe_unused = sock->sk; - int err; - - BT_DBG("sk %p cmd %x arg %lx", sk, cmd, arg); - - err = bt_sock_ioctl(sock, cmd, arg); - - if (err == -ENOIOCTLCMD) { -#ifdef CONFIG_BT_RFCOMM_TTY - lock_sock(sk); - err = rfcomm_dev_ioctl(sk, cmd, (void __user *) arg); - release_sock(sk); -#else - err = -EOPNOTSUPP; -#endif - } - - return err; -} - -static int rfcomm_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; - - lock_sock(sk); - if (!sk->sk_shutdown) { - sk->sk_shutdown = SHUTDOWN_MASK; - __rfcomm_sock_close(sk); - - if (sock_flag(sk, SOCK_LINGER) && sk->sk_lingertime) - err = bt_sock_wait_state(sk, BT_CLOSED, sk->sk_lingertime); - } - release_sock(sk); - return err; -} - -static int rfcomm_sock_release(struct socket *sock) -{ - struct sock *sk = sock->sk; - int err; - - BT_DBG("sock %p, sk %p", sock, sk); - - if (!sk) - return 0; - - err = rfcomm_sock_shutdown(sock, 2); - - sock_orphan(sk); - rfcomm_sock_kill(sk); - return err; -} - -/* ---- RFCOMM core layer callbacks ---- - * - * called under rfcomm_lock() - */ -int rfcomm_connect_ind(struct rfcomm_session *s, u8 channel, struct rfcomm_dlc **d) -{ - struct sock *sk, *parent; - bdaddr_t src, dst; - int result = 0; - - BT_DBG("session %p channel %d", s, channel); - - rfcomm_session_getaddr(s, &src, &dst); - - /* Check if we have socket listening on channel */ - parent = rfcomm_get_sock_by_channel(BT_LISTEN, channel, &src); - if (!parent) - return 0; - - bh_lock_sock(parent); - - /* Check for backlog size */ - if (sk_acceptq_is_full(parent)) { - BT_DBG("backlog full %d", parent->sk_ack_backlog); - goto done; - } - - sk = rfcomm_sock_alloc(sock_net(parent), NULL, BTPROTO_RFCOMM, GFP_ATOMIC); - if (!sk) - goto done; - - bt_sock_reclassify_lock(sk, BTPROTO_RFCOMM); - - rfcomm_sock_init(sk, parent); - bacpy(&bt_sk(sk)->src, &src); - bacpy(&bt_sk(sk)->dst, &dst); - rfcomm_pi(sk)->channel = channel; - - sk->sk_state = BT_CONFIG; - bt_accept_enqueue(parent, sk); - - /* Accept connection and return socket DLC */ - *d = rfcomm_pi(sk)->dlc; - result = 1; - -done: - bh_unlock_sock(parent); - - if (bt_sk(parent)->defer_setup) - parent->sk_state_change(parent); - - return result; -} - -static int rfcomm_sock_debugfs_show(struct seq_file *f, void *p) -{ - struct sock *sk; - struct hlist_node *node; - - read_lock(&rfcomm_sk_list.lock); - - sk_for_each(sk, node, &rfcomm_sk_list.head) { - seq_printf(f, "%s %s %d %d\n", - batostr(&bt_sk(sk)->src), - batostr(&bt_sk(sk)->dst), - sk->sk_state, rfcomm_pi(sk)->channel); - } - - read_unlock(&rfcomm_sk_list.lock); - - return 0; -} - -static int rfcomm_sock_debugfs_open(struct inode *inode, struct file *file) -{ - return single_open(file, rfcomm_sock_debugfs_show, inode->i_private); -} - -static const struct file_operations rfcomm_sock_debugfs_fops = { - .open = rfcomm_sock_debugfs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static struct dentry *rfcomm_sock_debugfs; - -static const struct proto_ops rfcomm_sock_ops = { - .family = PF_BLUETOOTH, - .owner = THIS_MODULE, - .release = rfcomm_sock_release, - .bind = rfcomm_sock_bind, - .connect = rfcomm_sock_connect, - .listen = rfcomm_sock_listen, - .accept = rfcomm_sock_accept, - .getname = rfcomm_sock_getname, - .sendmsg = rfcomm_sock_sendmsg, - .recvmsg = rfcomm_sock_recvmsg, - .shutdown = rfcomm_sock_shutdown, - .setsockopt = rfcomm_sock_setsockopt, - .getsockopt = rfcomm_sock_getsockopt, - .ioctl = rfcomm_sock_ioctl, - .poll = bt_sock_poll, - .socketpair = sock_no_socketpair, - .mmap = sock_no_mmap -}; - -static const struct net_proto_family rfcomm_sock_family_ops = { - .family = PF_BLUETOOTH, - .owner = THIS_MODULE, - .create = rfcomm_sock_create -}; - -int __init rfcomm_init_sockets(void) -{ - int err; - - err = proto_register(&rfcomm_proto, 0); - if (err < 0) - return err; - - err = bt_sock_register(BTPROTO_RFCOMM, &rfcomm_sock_family_ops); - if (err < 0) - goto error; - - if (bt_debugfs) { - rfcomm_sock_debugfs = debugfs_create_file("rfcomm", 0444, - bt_debugfs, NULL, &rfcomm_sock_debugfs_fops); - if (!rfcomm_sock_debugfs) - BT_ERR("Failed to create RFCOMM debug file"); - } - - BT_INFO("RFCOMM socket layer initialized"); - - return 0; - -error: - BT_ERR("RFCOMM socket layer registration failed"); - proto_unregister(&rfcomm_proto); - return err; -} - -void __exit rfcomm_cleanup_sockets(void) -{ - debugfs_remove(rfcomm_sock_debugfs); - - if (bt_sock_unregister(BTPROTO_RFCOMM) < 0) - BT_ERR("RFCOMM socket layer unregistration failed"); - - proto_unregister(&rfcomm_proto); -} |