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;
391 haddr->hci_channel= 0;
397 static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_buff *skb)
399 __u32 mask = hci_pi(sk)->cmsg_mask;
401 if (mask & HCI_CMSG_DIR) {
402 int incoming = bt_cb(skb)->incoming;
403 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming), &incoming);
406 if (mask & HCI_CMSG_TSTAMP) {
408 struct compat_timeval ctv;
414 skb_get_timestamp(skb, &tv);
419 if (msg->msg_flags & MSG_CMSG_COMPAT) {
420 ctv.tv_sec = tv.tv_sec;
421 ctv.tv_usec = tv.tv_usec;
427 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
431 static int hci_sock_recvmsg(struct kiocb *iocb, struct socket *sock,
432 struct msghdr *msg, size_t len, int flags)
434 int noblock = flags & MSG_DONTWAIT;
435 struct sock *sk = sock->sk;
439 BT_DBG("sock %p, sk %p", sock, sk);
441 if (flags & (MSG_OOB))
444 if (sk->sk_state == BT_CLOSED)
447 skb = skb_recv_datagram(sk, flags, noblock, &err);
451 msg->msg_namelen = 0;
455 msg->msg_flags |= MSG_TRUNC;
459 skb_reset_transport_header(skb);
460 err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
462 hci_sock_cmsg(sk, msg, skb);
464 skb_free_datagram(sk, skb);
466 return err ? : copied;
469 static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
470 struct msghdr *msg, size_t len)
472 struct sock *sk = sock->sk;
473 struct hci_dev *hdev;
477 BT_DBG("sock %p sk %p", sock, sk);
479 if (msg->msg_flags & MSG_OOB)
482 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE))
485 if (len < 4 || len > HCI_MAX_FRAME_SIZE)
490 switch (hci_pi(sk)->channel) {
491 case HCI_CHANNEL_RAW:
493 case HCI_CHANNEL_CONTROL:
494 err = mgmt_control(sk, msg, len);
501 hdev = hci_pi(sk)->hdev;
507 if (!test_bit(HCI_UP, &hdev->flags)) {
512 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
516 if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
521 bt_cb(skb)->pkt_type = *((unsigned char *) skb->data);
523 skb->dev = (void *) hdev;
525 if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT) {
526 u16 opcode = get_unaligned_le16(skb->data);
527 u16 ogf = hci_opcode_ogf(opcode);
528 u16 ocf = hci_opcode_ocf(opcode);
530 if (((ogf > HCI_SFLT_MAX_OGF) ||
531 !hci_test_bit(ocf & HCI_FLT_OCF_BITS, &hci_sec_filter.ocf_mask[ogf])) &&
532 !capable(CAP_NET_RAW)) {
537 if (test_bit(HCI_RAW, &hdev->flags) || (ogf == 0x3f)) {
538 skb_queue_tail(&hdev->raw_q, skb);
539 tasklet_schedule(&hdev->tx_task);
541 skb_queue_tail(&hdev->cmd_q, skb);
542 tasklet_schedule(&hdev->cmd_task);
545 if (!capable(CAP_NET_RAW)) {
550 skb_queue_tail(&hdev->raw_q, skb);
551 tasklet_schedule(&hdev->tx_task);
565 static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len)
567 struct hci_ufilter uf = { .opcode = 0 };
568 struct sock *sk = sock->sk;
569 int err = 0, opt = 0;
571 BT_DBG("sk %p, opt %d", sk, optname);
577 if (get_user(opt, (int __user *)optval)) {
583 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
585 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
589 if (get_user(opt, (int __user *)optval)) {
595 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
597 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
602 struct hci_filter *f = &hci_pi(sk)->filter;
604 uf.type_mask = f->type_mask;
605 uf.opcode = f->opcode;
606 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
607 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
610 len = min_t(unsigned int, len, sizeof(uf));
611 if (copy_from_user(&uf, optval, len)) {
616 if (!capable(CAP_NET_RAW)) {
617 uf.type_mask &= hci_sec_filter.type_mask;
618 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
619 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
623 struct hci_filter *f = &hci_pi(sk)->filter;
625 f->type_mask = uf.type_mask;
626 f->opcode = uf.opcode;
627 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
628 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
641 static int hci_sock_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen)
643 struct hci_ufilter uf;
644 struct sock *sk = sock->sk;
647 if (get_user(len, optlen))
652 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
657 if (put_user(opt, optval))
662 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
667 if (put_user(opt, optval))
673 struct hci_filter *f = &hci_pi(sk)->filter;
675 memset(&uf, 0, sizeof(uf));
676 uf.type_mask = f->type_mask;
677 uf.opcode = f->opcode;
678 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
679 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
682 len = min_t(unsigned int, len, sizeof(uf));
683 if (copy_to_user(optval, &uf, len))
695 static const struct proto_ops hci_sock_ops = {
696 .family = PF_BLUETOOTH,
697 .owner = THIS_MODULE,
698 .release = hci_sock_release,
699 .bind = hci_sock_bind,
700 .getname = hci_sock_getname,
701 .sendmsg = hci_sock_sendmsg,
702 .recvmsg = hci_sock_recvmsg,
703 .ioctl = hci_sock_ioctl,
704 .poll = datagram_poll,
705 .listen = sock_no_listen,
706 .shutdown = sock_no_shutdown,
707 .setsockopt = hci_sock_setsockopt,
708 .getsockopt = hci_sock_getsockopt,
709 .connect = sock_no_connect,
710 .socketpair = sock_no_socketpair,
711 .accept = sock_no_accept,
715 static struct proto hci_sk_proto = {
717 .owner = THIS_MODULE,
718 .obj_size = sizeof(struct hci_pinfo)
721 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
726 BT_DBG("sock %p", sock);
728 if (sock->type != SOCK_RAW)
729 return -ESOCKTNOSUPPORT;
731 sock->ops = &hci_sock_ops;
733 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto);
737 sock_init_data(sock, sk);
739 sock_reset_flag(sk, SOCK_ZAPPED);
741 sk->sk_protocol = protocol;
743 sock->state = SS_UNCONNECTED;
744 sk->sk_state = BT_OPEN;
746 bt_sock_link(&hci_sk_list, sk);
750 static int hci_sock_dev_event(struct notifier_block *this, unsigned long event, void *ptr)
752 struct hci_dev *hdev = (struct hci_dev *) ptr;
753 struct hci_ev_si_device ev;
755 BT_DBG("hdev %s event %ld", hdev->name, event);
757 /* Send event to sockets */
759 ev.dev_id = hdev->id;
760 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
762 if (event == HCI_DEV_UNREG) {
764 struct hlist_node *node;
766 /* Detach sockets from device */
767 read_lock(&hci_sk_list.lock);
768 sk_for_each(sk, node, &hci_sk_list.head) {
770 bh_lock_sock_nested(sk);
771 if (hci_pi(sk)->hdev == hdev) {
772 hci_pi(sk)->hdev = NULL;
774 sk->sk_state = BT_OPEN;
775 sk->sk_state_change(sk);
782 read_unlock(&hci_sk_list.lock);
788 static const struct net_proto_family hci_sock_family_ops = {
789 .family = PF_BLUETOOTH,
790 .owner = THIS_MODULE,
791 .create = hci_sock_create,
794 static struct notifier_block hci_sock_nblock = {
795 .notifier_call = hci_sock_dev_event
798 int __init hci_sock_init(void)
802 err = proto_register(&hci_sk_proto, 0);
806 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
810 hci_register_notifier(&hci_sock_nblock);
812 BT_INFO("HCI socket layer initialized");
817 BT_ERR("HCI socket registration failed");
818 proto_unregister(&hci_sk_proto);
822 void hci_sock_cleanup(void)
824 if (bt_sock_unregister(BTPROTO_HCI) < 0)
825 BT_ERR("HCI socket unregistration failed");
827 hci_unregister_notifier(&hci_sock_nblock);
829 proto_unregister(&hci_sk_proto);
832 module_param(enable_mgmt, bool, 0644);
833 MODULE_PARM_DESC(enable_mgmt, "Enable Management interface");