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 <linux/uaccess.h>
47 #include <asm/unaligned.h>
49 #include <net/bluetooth/bluetooth.h>
50 #include <net/bluetooth/hci_core.h>
52 static int enable_mgmt;
54 /* ----- HCI socket interface ----- */
56 static inline int hci_test_bit(int nr, void *addr)
58 return *((__u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
62 static struct hci_sec_filter hci_sec_filter = {
66 { 0x1000d9fe, 0x0000b00c },
71 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
73 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
75 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
77 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
78 /* OGF_STATUS_PARAM */
79 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
83 static struct bt_sock_list hci_sk_list = {
84 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
87 /* Send frame to RAW socket */
88 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb,
92 struct hlist_node *node;
94 BT_DBG("hdev %p len %d", hdev, skb->len);
96 read_lock(&hci_sk_list.lock);
97 sk_for_each(sk, node, &hci_sk_list.head) {
98 struct hci_filter *flt;
104 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
107 /* Don't send frame to the socket it came from */
111 if (bt_cb(skb)->channel != hci_pi(sk)->channel)
114 if (bt_cb(skb)->channel == HCI_CHANNEL_CONTROL)
118 flt = &hci_pi(sk)->filter;
120 if (!test_bit((bt_cb(skb)->pkt_type == HCI_VENDOR_PKT) ?
121 0 : (bt_cb(skb)->pkt_type & HCI_FLT_TYPE_BITS), &flt->type_mask))
124 if (bt_cb(skb)->pkt_type == HCI_EVENT_PKT) {
125 register int evt = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
127 if (!hci_test_bit(evt, &flt->event_mask))
131 ((evt == HCI_EV_CMD_COMPLETE &&
133 get_unaligned((__le16 *)(skb->data + 3))) ||
134 (evt == HCI_EV_CMD_STATUS &&
136 get_unaligned((__le16 *)(skb->data + 4)))))
141 nskb = skb_clone(skb, GFP_ATOMIC);
145 /* Put type byte before the data */
146 if (bt_cb(skb)->channel == HCI_CHANNEL_RAW)
147 memcpy(skb_push(nskb, 1), &bt_cb(nskb)->pkt_type, 1);
149 if (sock_queue_rcv_skb(sk, nskb))
152 read_unlock(&hci_sk_list.lock);
155 static int hci_sock_release(struct socket *sock)
157 struct sock *sk = sock->sk;
158 struct hci_dev *hdev;
160 BT_DBG("sock %p sk %p", sock, sk);
165 hdev = hci_pi(sk)->hdev;
167 bt_sock_unlink(&hci_sk_list, sk);
170 atomic_dec(&hdev->promisc);
176 skb_queue_purge(&sk->sk_receive_queue);
177 skb_queue_purge(&sk->sk_write_queue);
183 static int hci_sock_blacklist_add(struct hci_dev *hdev, void __user *arg)
188 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
191 hci_dev_lock_bh(hdev);
193 err = hci_blacklist_add(hdev, &bdaddr);
195 hci_dev_unlock_bh(hdev);
200 static int hci_sock_blacklist_del(struct hci_dev *hdev, void __user *arg)
205 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
208 hci_dev_lock_bh(hdev);
210 err = hci_blacklist_del(hdev, &bdaddr);
212 hci_dev_unlock_bh(hdev);
217 /* Ioctls that require bound socket */
218 static inline int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
220 struct hci_dev *hdev = hci_pi(sk)->hdev;
227 if (!capable(CAP_NET_ADMIN))
230 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
234 set_bit(HCI_RAW, &hdev->flags);
236 clear_bit(HCI_RAW, &hdev->flags);
241 return hci_get_conn_info(hdev, (void __user *) arg);
244 return hci_get_auth_info(hdev, (void __user *) arg);
247 if (!capable(CAP_NET_ADMIN))
249 return hci_sock_blacklist_add(hdev, (void __user *) arg);
252 if (!capable(CAP_NET_ADMIN))
254 return hci_sock_blacklist_del(hdev, (void __user *) arg);
258 return hdev->ioctl(hdev, cmd, arg);
263 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
265 struct sock *sk = sock->sk;
266 void __user *argp = (void __user *) arg;
269 BT_DBG("cmd %x arg %lx", cmd, arg);
273 return hci_get_dev_list(argp);
276 return hci_get_dev_info(argp);
279 return hci_get_conn_list(argp);
282 if (!capable(CAP_NET_ADMIN))
284 return hci_dev_open(arg);
287 if (!capable(CAP_NET_ADMIN))
289 return hci_dev_close(arg);
292 if (!capable(CAP_NET_ADMIN))
294 return hci_dev_reset(arg);
297 if (!capable(CAP_NET_ADMIN))
299 return hci_dev_reset_stat(arg);
309 if (!capable(CAP_NET_ADMIN))
311 return hci_dev_cmd(cmd, argp);
314 return hci_inquiry(argp);
318 err = hci_sock_bound_ioctl(sk, cmd, arg);
324 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
326 struct sockaddr_hci haddr;
327 struct sock *sk = sock->sk;
328 struct hci_dev *hdev = NULL;
331 BT_DBG("sock %p sk %p", sock, sk);
336 memset(&haddr, 0, sizeof(haddr));
337 len = min_t(unsigned int, sizeof(haddr), addr_len);
338 memcpy(&haddr, addr, len);
340 if (haddr.hci_family != AF_BLUETOOTH)
343 if (haddr.hci_channel > HCI_CHANNEL_CONTROL)
346 if (haddr.hci_channel == HCI_CHANNEL_CONTROL && !enable_mgmt)
351 if (sk->sk_state == BT_BOUND || hci_pi(sk)->hdev) {
356 if (haddr.hci_dev != HCI_DEV_NONE) {
357 hdev = hci_dev_get(haddr.hci_dev);
363 atomic_inc(&hdev->promisc);
366 hci_pi(sk)->channel = haddr.hci_channel;
367 hci_pi(sk)->hdev = hdev;
368 sk->sk_state = BT_BOUND;
375 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr, int *addr_len, int peer)
377 struct sockaddr_hci *haddr = (struct sockaddr_hci *) addr;
378 struct sock *sk = sock->sk;
379 struct hci_dev *hdev = hci_pi(sk)->hdev;
381 BT_DBG("sock %p sk %p", sock, sk);
388 *addr_len = sizeof(*haddr);
389 haddr->hci_family = AF_BLUETOOTH;
390 haddr->hci_dev = hdev->id;
396 static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
398 __u32 mask = hci_pi(sk)->cmsg_mask;
400 if (mask & HCI_CMSG_DIR) {
401 int incoming = bt_cb(skb)->incoming;
402 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming);
405 if (mask & HCI_CMSG_TSTAMP) {
407 struct compat_timeval ctv;
413 skb_get_timestamp(skb, &tv);
418 if (msg->msg_flags & MSG_CMSG_COMPAT) {
419 ctv.tv_sec = tv.tv_sec;
420 ctv.tv_usec = tv.tv_usec;
426 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
430 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
431 struct msghdr *msg, size_t len, int flags)
433 int noblock = flags & MSG_DONTWAIT;
434 struct sock *sk = sock->sk;
438 BT_DBG("sock %p, sk %p", sock, sk);
440 if (flags & (MSG_OOB))
443 if (sk->sk_state == BT_CLOSED)
446 skb = skb_recv_datagram(sk, flags, noblock, &err);
450 msg->msg_namelen = 0;
454 msg->msg_flags |= MSG_TRUNC;
458 skb_reset_transport_header(skb);
459 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
461 hci_sock_cmsg(sk, msg, skb);
463 skb_free_datagram(sk, skb);
465 return err ? : copied;
468 static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
469 struct msghdr *msg, size_t len)
471 struct sock *sk = sock->sk;
472 struct hci_dev *hdev;
476 BT_DBG("sock %p sk %p", sock, sk);
478 if (msg->msg_flags & MSG_OOB)
481 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
484 if (len < 4 || len > HCI_MAX_FRAME_SIZE)
489 switch (hci_pi(sk)->channel) {
490 case HCI_CHANNEL_RAW:
492 case HCI_CHANNEL_CONTROL:
493 err = mgmt_control(sk, msg, len);
500 hdev = hci_pi(sk)->hdev;
506 if (!test_bit(HCI_UP, &hdev->flags)) {
511 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
515 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
520 bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
522 skb->dev = (void *) hdev;
524 if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
525 u16 opcode = get_unaligned_le16(skb->data);
526 u16 ogf = hci_opcode_ogf(opcode);
527 u16 ocf = hci_opcode_ocf(opcode);
529 if (((ogf > HCI_SFLT_MAX_OGF) ||
530 !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) &&
531 !capable(CAP_NET_RAW)) {
536 if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
537 skb_queue_tail(&hdev->raw_q, skb);
538 tasklet_schedule(&hdev->tx_task);
540 skb_queue_tail(&hdev->cmd_q, skb);
541 tasklet_schedule(&hdev->cmd_task);
544 if (!capable(CAP_NET_RAW)) {
549 skb_queue_tail(&hdev->raw_q, skb);
550 tasklet_schedule(&hdev->tx_task);
564 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len)
566 struct hci_ufilter uf = { .opcode = 0 };
567 struct sock *sk = sock->sk;
568 int err = 0, opt = 0;
570 BT_DBG("sk %p, opt %d", sk, optname);
576 if (get_user(opt, (int __user *)optval)) {
582 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
584 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
588 if (get_user(opt, (int __user *)optval)) {
594 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
596 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
601 struct hci_filter *f = &hci_pi(sk)->filter;
603 uf.type_mask = f->type_mask;
604 uf.opcode = f->opcode;
605 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
606 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
609 len = min_t(unsigned int, len, sizeof(uf));
610 if (copy_from_user(&uf, optval, len)) {
615 if (!capable(CAP_NET_RAW)) {
616 uf.type_mask &= hci_sec_filter.type_mask;
617 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
618 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
622 struct hci_filter *f = &hci_pi(sk)->filter;
624 f->type_mask = uf.type_mask;
625 f->opcode = uf.opcode;
626 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
627 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
640 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
642 struct hci_ufilter uf;
643 struct sock *sk = sock->sk;
646 if (get_user(len, optlen))
651 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
656 if (put_user(opt, optval))
661 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
666 if (put_user(opt, optval))
672 struct hci_filter *f = &hci_pi(sk)->filter;
674 uf.type_mask = f->type_mask;
675 uf.opcode = f->opcode;
676 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
677 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
680 len = min_t(unsigned int, len, sizeof(uf));
681 if (copy_to_user(optval, &uf, len))
693 static const struct proto_ops hci_sock_ops = {
694 .family = PF_BLUETOOTH,
695 .owner = THIS_MODULE,
696 .release = hci_sock_release,
697 .bind = hci_sock_bind,
698 .getname = hci_sock_getname,
699 .sendmsg = hci_sock_sendmsg,
700 .recvmsg = hci_sock_recvmsg,
701 .ioctl = hci_sock_ioctl,
702 .poll = datagram_poll,
703 .listen = sock_no_listen,
704 .shutdown = sock_no_shutdown,
705 .setsockopt = hci_sock_setsockopt,
706 .getsockopt = hci_sock_getsockopt,
707 .connect = sock_no_connect,
708 .socketpair = sock_no_socketpair,
709 .accept = sock_no_accept,
713 static struct proto hci_sk_proto = {
715 .owner = THIS_MODULE,
716 .obj_size = sizeof(struct hci_pinfo)
719 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
724 BT_DBG("sock %p", sock);
726 if (sock->type != SOCK_RAW)
727 return -ESOCKTNOSUPPORT;
729 sock->ops = &hci_sock_ops;
731 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto);
735 sock_init_data(sock, sk);
737 sock_reset_flag(sk, SOCK_ZAPPED);
739 sk->sk_protocol = protocol;
741 sock->state = SS_UNCONNECTED;
742 sk->sk_state = BT_OPEN;
744 bt_sock_link(&hci_sk_list, sk);
748 static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
750 struct hci_dev *hdev = (struct hci_dev *) ptr;
751 struct hci_ev_si_device ev;
753 BT_DBG("hdev %s event %ld", hdev->name, event);
755 /* Send event to sockets */
757 ev.dev_id = hdev->id;
758 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
760 if (event == HCI_DEV_UNREG) {
762 struct hlist_node *node;
764 /* Detach sockets from device */
765 read_lock(&hci_sk_list.lock);
766 sk_for_each(sk, node, &hci_sk_list.head) {
768 bh_lock_sock_nested(sk);
769 if (hci_pi(sk)->hdev == hdev) {
770 hci_pi(sk)->hdev = NULL;
772 sk->sk_state = BT_OPEN;
773 sk->sk_state_change(sk);
780 read_unlock(&hci_sk_list.lock);
786 static const struct net_proto_family hci_sock_family_ops = {
787 .family = PF_BLUETOOTH,
788 .owner = THIS_MODULE,
789 .create = hci_sock_create,
792 static struct notifier_block hci_sock_nblock = {
793 .notifier_call = hci_sock_dev_event
796 int __init hci_sock_init(void)
800 err = proto_register(&hci_sk_proto, 0);
804 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
808 hci_register_notifier(&hci_sock_nblock);
810 BT_INFO("HCI socket layer initialized");
815 BT_ERR("HCI socket registration failed");
816 proto_unregister(&hci_sk_proto);
820 void hci_sock_cleanup(void)
822 if (bt_sock_unregister(BTPROTO_HCI) < 0)
823 BT_ERR("HCI socket unregistration failed");
825 hci_unregister_notifier(&hci_sock_nblock);
827 proto_unregister(&hci_sk_proto);
830 module_param(enable_mgmt, bool, 0644);
831 MODULE_PARM_DESC(enable_mgmt, "Enable Management interface");