2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
5 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License version 2 as
9 published by the Free Software Foundation;
11 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
12 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
14 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
15 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
16 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
21 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
22 SOFTWARE IS DISCLAIMED.
25 /* Bluetooth HCI sockets. */
27 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/capability.h>
31 #include <linux/errno.h>
32 #include <linux/kernel.h>
33 #include <linux/slab.h>
34 #include <linux/poll.h>
35 #include <linux/fcntl.h>
36 #include <linux/init.h>
37 #include <linux/skbuff.h>
38 #include <linux/workqueue.h>
39 #include <linux/interrupt.h>
40 #include <linux/compat.h>
41 #include <linux/socket.h>
42 #include <linux/ioctl.h>
45 #include <asm/system.h>
46 #include <asm/uaccess.h>
47 #include <asm/unaligned.h>
49 #include <net/bluetooth/bluetooth.h>
50 #include <net/bluetooth/hci_core.h>
52 /* ----- HCI socket interface ----- */
54 static inline int hci_test_bit(int nr, void *addr)
56 return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
60 static struct hci_sec_filter hci_sec_filter = {
64 { 0x1000d9fe, 0x0000b00c },
69 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
71 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
73 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
75 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
76 /* OGF_STATUS_PARAM */
77 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
81 static struct bt_sock_list hci_sk_list = {
82 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
85 /* Send frame to RAW socket */
86 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
89 struct hlist_node *node;
91 BT_DBG("hdev %p len %d", hdev, skb->len);
93 read_lock(&hci_sk_list.lock);
94 sk_for_each(sk, node, &hci_sk_list.head) {
95 struct hci_filter *flt;
98 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
101 /* Don't send frame to the socket it came from */
106 flt = &hci_pi(sk)->filter;
108 if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ?
109 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask))
112 if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) {
113 register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
115 if (!hci_test_bit(evt, &flt->event_mask))
119 ((evt == HCI_EV_CMD_COMPLETE &&
121 get_unaligned((__le16 *)(skb->data + 3))) ||
122 (evt == HCI_EV_CMD_STATUS &&
124 get_unaligned((__le16 *)(skb->data + 4)))))
128 if (!(nskb = skb_clone(skb, GFP_ATOMIC)))
131 /* Put type byte before the data */
132 memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
134 if (sock_queue_rcv_skb(sk, nskb))
137 read_unlock(&hci_sk_list.lock);
140 static int hci_sock_release(struct socket *sock)
142 struct sock *sk = sock->sk;
143 struct hci_dev *hdev;
145 BT_DBG("sock %p sk %p", sock, sk);
150 hdev = hci_pi(sk)->hdev;
152 bt_sock_unlink(&hci_sk_list, sk);
155 atomic_dec(&hdev->promisc);
161 skb_queue_purge(&sk->sk_receive_queue);
162 skb_queue_purge(&sk->sk_write_queue);
168 /* Ioctls that require bound socket */
169 static inline int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
171 struct hci_dev *hdev = hci_pi(sk)->hdev;
178 if (!capable(CAP_NET_ADMIN))
181 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
185 set_bit(HCI_RAW, &hdev->flags);
187 clear_bit(HCI_RAW, &hdev->flags);
192 return hci_get_conn_info(hdev, (void __user *) arg);
195 return hci_get_auth_info(hdev, (void __user *) arg);
199 return hdev->ioctl(hdev, cmd, arg);
204 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
206 struct sock *sk = sock->sk;
207 void __user *argp = (void __user *) arg;
210 BT_DBG("cmd %x arg %lx", cmd, arg);
214 return hci_get_dev_list(argp);
217 return hci_get_dev_info(argp);
220 return hci_get_conn_list(argp);
223 if (!capable(CAP_NET_ADMIN))
225 return hci_dev_open(arg);
228 if (!capable(CAP_NET_ADMIN))
230 return hci_dev_close(arg);
233 if (!capable(CAP_NET_ADMIN))
235 return hci_dev_reset(arg);
238 if (!capable(CAP_NET_ADMIN))
240 return hci_dev_reset_stat(arg);
250 if (!capable(CAP_NET_ADMIN))
252 return hci_dev_cmd(cmd, argp);
255 return hci_inquiry(argp);
259 err = hci_sock_bound_ioctl(sk, cmd, arg);
265 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
267 struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
268 struct sock *sk = sock->sk;
269 struct hci_dev *hdev = NULL;
272 BT_DBG("sock %p sk %p", sock, sk);
274 if (!haddr || haddr->hci_family != AF_BLUETOOTH)
279 if (hci_pi(sk)->hdev) {
284 if (haddr->hci_dev != HCI_DEV_NONE) {
285 if (!(hdev = hci_dev_get(haddr->hci_dev))) {
290 atomic_inc(&hdev->promisc);
293 hci_pi(sk)->hdev = hdev;
294 sk->sk_state = BT_BOUND;
301 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer)
303 struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
304 struct sock *sk = sock->sk;
305 struct hci_dev *hdev = hci_pi(sk)->hdev;
307 BT_DBG("sock %p sk %p", sock, sk);
314 *addr_len = sizeof(*haddr);
315 haddr->hci_family = AF_BLUETOOTH;
316 haddr->hci_dev = hdev->id;
322 static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
324 __u32 mask = hci_pi(sk)->cmsg_mask;
326 if (mask & HCI_CMSG_DIR) {
327 int incoming = bt_cb(skb)->incoming;
328 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming);
331 if (mask & HCI_CMSG_TSTAMP) {
333 struct compat_timeval ctv;
339 skb_get_timestamp(skb, &tv);
344 if (msg->msg_flags & MSG_CMSG_COMPAT) {
345 ctv.tv_sec = tv.tv_sec;
346 ctv.tv_usec = tv.tv_usec;
352 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
356 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
357 struct msghdr *msg, size_t len, int flags)
359 int noblock = flags & MSG_DONTWAIT;
360 struct sock *sk = sock->sk;
364 BT_DBG("sock %p, sk %p", sock, sk);
366 if (flags & (MSG_OOB))
369 if (sk->sk_state == BT_CLOSED)
372 if (!(skb = skb_recv_datagram(sk, flags, noblock, &err)))
375 msg->msg_namelen = 0;
379 msg->msg_flags |= MSG_TRUNC;
383 skb_reset_transport_header(skb);
384 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
386 hci_sock_cmsg(sk, msg, skb);
388 skb_free_datagram(sk, skb);
390 return err ? : copied;
393 static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
394 struct msghdr *msg, size_t len)
396 struct sock *sk = sock->sk;
397 struct hci_dev *hdev;
401 BT_DBG("sock %p sk %p", sock, sk);
403 if (msg->msg_flags & MSG_OOB)
406 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
409 if (len < 4 || len > HCI_MAX_FRAME_SIZE)
414 if (!(hdev = hci_pi(sk)->hdev)) {
419 if (!test_bit(HCI_UP, &hdev->flags)) {
424 if (!(skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err)))
427 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
432 bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
434 skb->dev = (void *) hdev;
436 if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
437 u16 opcode = get_unaligned_le16(skb->data);
438 u16 ogf = hci_opcode_ogf(opcode);
439 u16 ocf = hci_opcode_ocf(opcode);
441 if (((ogf > HCI_SFLT_MAX_OGF) ||
442 !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) &&
443 !capable(CAP_NET_RAW)) {
448 if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
449 skb_queue_tail(&hdev->raw_q, skb);
450 tasklet_schedule(&hdev->tx_task);
452 skb_queue_tail(&hdev->cmd_q, skb);
453 tasklet_schedule(&hdev->cmd_task);
456 if (!capable(CAP_NET_RAW)) {
461 skb_queue_tail(&hdev->raw_q, skb);
462 tasklet_schedule(&hdev->tx_task);
476 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,31))
477 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len)
479 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int len)
482 struct hci_ufilter uf = { .opcode = 0 };
483 struct sock *sk = sock->sk;
484 int err = 0, opt = 0;
486 BT_DBG("sk %p, opt %d", sk, optname);
492 if (get_user(opt, (int __user *)optval)) {
498 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
500 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
504 if (get_user(opt, (int __user *)optval)) {
510 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
512 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
517 struct hci_filter *f = &hci_pi(sk)->filter;
519 uf.type_mask = f->type_mask;
520 uf.opcode = f->opcode;
521 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
522 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
525 len = min_t(unsigned int, len, sizeof(uf));
526 if (copy_from_user(&uf, optval, len)) {
531 if (!capable(CAP_NET_RAW)) {
532 uf.type_mask &= hci_sec_filter.type_mask;
533 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
534 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
538 struct hci_filter *f = &hci_pi(sk)->filter;
540 f->type_mask = uf.type_mask;
541 f->opcode = uf.opcode;
542 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
543 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
556 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
558 struct hci_ufilter uf;
559 struct sock *sk = sock->sk;
562 if (get_user(len, optlen))
567 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
572 if (put_user(opt, optval))
577 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
582 if (put_user(opt, optval))
588 struct hci_filter *f = &hci_pi(sk)->filter;
590 uf.type_mask = f->type_mask;
591 uf.opcode = f->opcode;
592 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
593 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
596 len = min_t(unsigned int, len, sizeof(uf));
597 if (copy_to_user(optval, &uf, len))
609 static const struct proto_ops hci_sock_ops = {
610 .family = PF_BLUETOOTH,
611 .owner = THIS_MODULE,
612 .release = hci_sock_release,
613 .bind = hci_sock_bind,
614 .getname = hci_sock_getname,
615 .sendmsg = hci_sock_sendmsg,
616 .recvmsg = hci_sock_recvmsg,
617 .ioctl = hci_sock_ioctl,
618 .poll = datagram_poll,
619 .listen = sock_no_listen,
620 .shutdown = sock_no_shutdown,
621 .setsockopt = hci_sock_setsockopt,
622 .getsockopt = hci_sock_getsockopt,
623 .connect = sock_no_connect,
624 .socketpair = sock_no_socketpair,
625 .accept = sock_no_accept,
629 static struct proto hci_sk_proto = {
631 .owner = THIS_MODULE,
632 .obj_size = sizeof(struct hci_pinfo)
635 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,32))
636 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
639 static int hci_sock_create(struct net *net, struct socket *sock, int protocol)
644 BT_DBG("sock %p", sock);
646 if (sock->type != SOCK_RAW)
647 return -ESOCKTNOSUPPORT;
649 sock->ops = &hci_sock_ops;
651 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto);
655 sock_init_data(sock, sk);
657 sock_reset_flag(sk, SOCK_ZAPPED);
659 sk->sk_protocol = protocol;
661 sock->state = SS_UNCONNECTED;
662 sk->sk_state = BT_OPEN;
664 bt_sock_link(&hci_sk_list, sk);
668 static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
670 struct hci_dev *hdev = (struct hci_dev *) ptr;
671 struct hci_ev_si_device ev;
673 BT_DBG("hdev %s event %ld", hdev->name, event);
675 /* Send event to sockets */
677 ev.dev_id = hdev->id;
678 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
680 if (event == HCI_DEV_UNREG) {
682 struct hlist_node *node;
684 /* Detach sockets from device */
685 read_lock(&hci_sk_list.lock);
686 sk_for_each(sk, node, &hci_sk_list.head) {
688 bh_lock_sock_nested(sk);
689 if (hci_pi(sk)->hdev == hdev) {
690 hci_pi(sk)->hdev = NULL;
692 sk->sk_state = BT_OPEN;
693 sk->sk_state_change(sk);
700 read_unlock(&hci_sk_list.lock);
706 static const struct net_proto_family hci_sock_family_ops = {
707 .family = PF_BLUETOOTH,
708 .owner = THIS_MODULE,
709 .create = hci_sock_create,
712 static struct notifier_block hci_sock_nblock = {
713 .notifier_call = hci_sock_dev_event
716 int __init hci_sock_init(void)
720 err = proto_register(&hci_sk_proto, 0);
724 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
728 hci_register_notifier(&hci_sock_nblock);
730 BT_INFO("HCI socket layer initialized");
735 BT_ERR("HCI socket registration failed");
736 proto_unregister(&hci_sk_proto);
740 void __exit hci_sock_cleanup(void)
742 if (bt_sock_unregister(BTPROTO_HCI) < 0)
743 BT_ERR("HCI socket unregistration failed");
745 hci_unregister_notifier(&hci_sock_nblock);
747 proto_unregister(&hci_sk_proto);