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. */
26 #include <linux/compat.h>
27 #include <linux/export.h>
28 #include <linux/utsname.h>
29 #include <linux/sched.h>
30 #include <asm/unaligned.h>
32 #include <net/bluetooth/bluetooth.h>
33 #include <net/bluetooth/hci_core.h>
34 #include <net/bluetooth/hci_mon.h>
35 #include <net/bluetooth/mgmt.h>
37 #include "mgmt_util.h"
39 static LIST_HEAD(mgmt_chan_list);
40 static DEFINE_MUTEX(mgmt_chan_list_lock);
42 static DEFINE_IDA(sock_cookie_ida);
44 static atomic_t monitor_promisc = ATOMIC_INIT(0);
46 /* ----- HCI socket interface ----- */
49 #define hci_pi(sk) ((struct hci_pinfo *) sk)
54 struct hci_filter filter;
56 unsigned short channel;
59 char comm[TASK_COMM_LEN];
62 static struct hci_dev *hci_hdev_from_sock(struct sock *sk)
64 struct hci_dev *hdev = hci_pi(sk)->hdev;
67 return ERR_PTR(-EBADFD);
68 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
69 return ERR_PTR(-EPIPE);
73 void hci_sock_set_flag(struct sock *sk, int nr)
75 set_bit(nr, &hci_pi(sk)->flags);
78 void hci_sock_clear_flag(struct sock *sk, int nr)
80 clear_bit(nr, &hci_pi(sk)->flags);
83 int hci_sock_test_flag(struct sock *sk, int nr)
85 return test_bit(nr, &hci_pi(sk)->flags);
88 unsigned short hci_sock_get_channel(struct sock *sk)
90 return hci_pi(sk)->channel;
93 u32 hci_sock_get_cookie(struct sock *sk)
95 return hci_pi(sk)->cookie;
98 static bool hci_sock_gen_cookie(struct sock *sk)
100 int id = hci_pi(sk)->cookie;
103 id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
107 hci_pi(sk)->cookie = id;
108 get_task_comm(hci_pi(sk)->comm, current);
115 static void hci_sock_free_cookie(struct sock *sk)
117 int id = hci_pi(sk)->cookie;
120 hci_pi(sk)->cookie = 0xffffffff;
121 ida_simple_remove(&sock_cookie_ida, id);
125 static inline int hci_test_bit(int nr, const void *addr)
127 return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
130 /* Security filter */
131 #define HCI_SFLT_MAX_OGF 5
133 struct hci_sec_filter {
136 __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
139 static const struct hci_sec_filter hci_sec_filter = {
143 { 0x1000d9fe, 0x0000b00c },
148 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
149 /* OGF_LINK_POLICY */
150 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
152 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
154 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
155 /* OGF_STATUS_PARAM */
156 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
160 static struct bt_sock_list hci_sk_list = {
161 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
164 static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb)
166 struct hci_filter *flt;
167 int flt_type, flt_event;
170 flt = &hci_pi(sk)->filter;
172 flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS;
174 if (!test_bit(flt_type, &flt->type_mask))
177 /* Extra filter for event packets only */
178 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT)
181 flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
183 if (!hci_test_bit(flt_event, &flt->event_mask))
186 /* Check filter only when opcode is set */
190 if (flt_event == HCI_EV_CMD_COMPLETE &&
191 flt->opcode != get_unaligned((__le16 *)(skb->data + 3)))
194 if (flt_event == HCI_EV_CMD_STATUS &&
195 flt->opcode != get_unaligned((__le16 *)(skb->data + 4)))
201 /* Send frame to RAW socket */
202 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
205 struct sk_buff *skb_copy = NULL;
207 BT_DBG("hdev %p len %d", hdev, skb->len);
209 read_lock(&hci_sk_list.lock);
211 sk_for_each(sk, &hci_sk_list.head) {
212 struct sk_buff *nskb;
214 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
217 /* Don't send frame to the socket it came from */
221 if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) {
222 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
223 hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
224 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
225 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
226 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
228 if (is_filtered_packet(sk, skb))
230 } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
231 if (!bt_cb(skb)->incoming)
233 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
234 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
235 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
236 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
239 /* Don't send frame to other channel types */
244 /* Create a private copy with headroom */
245 skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true);
249 /* Put type byte before the data */
250 memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1);
253 nskb = skb_clone(skb_copy, GFP_ATOMIC);
257 if (sock_queue_rcv_skb(sk, nskb))
261 read_unlock(&hci_sk_list.lock);
266 /* Send frame to sockets with specific channel */
267 static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
268 int flag, struct sock *skip_sk)
272 BT_DBG("channel %u len %d", channel, skb->len);
274 sk_for_each(sk, &hci_sk_list.head) {
275 struct sk_buff *nskb;
277 /* Ignore socket without the flag set */
278 if (!hci_sock_test_flag(sk, flag))
281 /* Skip the original socket */
285 if (sk->sk_state != BT_BOUND)
288 if (hci_pi(sk)->channel != channel)
291 nskb = skb_clone(skb, GFP_ATOMIC);
295 if (sock_queue_rcv_skb(sk, nskb))
301 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
302 int flag, struct sock *skip_sk)
304 read_lock(&hci_sk_list.lock);
305 __hci_send_to_channel(channel, skb, flag, skip_sk);
306 read_unlock(&hci_sk_list.lock);
309 /* Send frame to monitor socket */
310 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
312 struct sk_buff *skb_copy = NULL;
313 struct hci_mon_hdr *hdr;
316 if (!atomic_read(&monitor_promisc))
319 BT_DBG("hdev %p len %d", hdev, skb->len);
321 switch (hci_skb_pkt_type(skb)) {
322 case HCI_COMMAND_PKT:
323 opcode = cpu_to_le16(HCI_MON_COMMAND_PKT);
326 opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
328 case HCI_ACLDATA_PKT:
329 if (bt_cb(skb)->incoming)
330 opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
332 opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
334 case HCI_SCODATA_PKT:
335 if (bt_cb(skb)->incoming)
336 opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
338 opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
340 case HCI_ISODATA_PKT:
341 if (bt_cb(skb)->incoming)
342 opcode = cpu_to_le16(HCI_MON_ISO_RX_PKT);
344 opcode = cpu_to_le16(HCI_MON_ISO_TX_PKT);
347 opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
353 /* Create a private copy with headroom */
354 skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true);
358 /* Put header before the data */
359 hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE);
360 hdr->opcode = opcode;
361 hdr->index = cpu_to_le16(hdev->id);
362 hdr->len = cpu_to_le16(skb->len);
364 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
365 HCI_SOCK_TRUSTED, NULL);
369 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
370 void *data, u16 data_len, ktime_t tstamp,
371 int flag, struct sock *skip_sk)
377 index = cpu_to_le16(hdev->id);
379 index = cpu_to_le16(MGMT_INDEX_NONE);
381 read_lock(&hci_sk_list.lock);
383 sk_for_each(sk, &hci_sk_list.head) {
384 struct hci_mon_hdr *hdr;
387 if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
390 /* Ignore socket without the flag set */
391 if (!hci_sock_test_flag(sk, flag))
394 /* Skip the original socket */
398 skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
402 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
403 put_unaligned_le16(event, skb_put(skb, 2));
406 skb_put_data(skb, data, data_len);
408 skb->tstamp = tstamp;
410 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
411 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
413 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
415 __hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
416 HCI_SOCK_TRUSTED, NULL);
420 read_unlock(&hci_sk_list.lock);
423 static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
425 struct hci_mon_hdr *hdr;
426 struct hci_mon_new_index *ni;
427 struct hci_mon_index_info *ii;
433 skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
437 ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
438 ni->type = hdev->dev_type;
440 bacpy(&ni->bdaddr, &hdev->bdaddr);
441 memcpy_and_pad(ni->name, sizeof(ni->name), hdev->name,
442 strnlen(hdev->name, sizeof(ni->name)), '\0');
444 opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
448 skb = bt_skb_alloc(0, GFP_ATOMIC);
452 opcode = cpu_to_le16(HCI_MON_DEL_INDEX);
456 if (hdev->manufacturer == 0xffff)
461 skb = bt_skb_alloc(HCI_MON_INDEX_INFO_SIZE, GFP_ATOMIC);
465 ii = skb_put(skb, HCI_MON_INDEX_INFO_SIZE);
466 bacpy(&ii->bdaddr, &hdev->bdaddr);
467 ii->manufacturer = cpu_to_le16(hdev->manufacturer);
469 opcode = cpu_to_le16(HCI_MON_INDEX_INFO);
473 skb = bt_skb_alloc(0, GFP_ATOMIC);
477 opcode = cpu_to_le16(HCI_MON_OPEN_INDEX);
481 skb = bt_skb_alloc(0, GFP_ATOMIC);
485 opcode = cpu_to_le16(HCI_MON_CLOSE_INDEX);
492 __net_timestamp(skb);
494 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
495 hdr->opcode = opcode;
496 hdr->index = cpu_to_le16(hdev->id);
497 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
502 static struct sk_buff *create_monitor_ctrl_open(struct sock *sk)
504 struct hci_mon_hdr *hdr;
510 /* No message needed when cookie is not present */
511 if (!hci_pi(sk)->cookie)
514 switch (hci_pi(sk)->channel) {
515 case HCI_CHANNEL_RAW:
517 ver[0] = BT_SUBSYS_VERSION;
518 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
520 case HCI_CHANNEL_USER:
522 ver[0] = BT_SUBSYS_VERSION;
523 put_unaligned_le16(BT_SUBSYS_REVISION, ver + 1);
525 case HCI_CHANNEL_CONTROL:
527 mgmt_fill_version_info(ver);
530 /* No message for unsupported format */
534 skb = bt_skb_alloc(14 + TASK_COMM_LEN , GFP_ATOMIC);
538 flags = hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) ? 0x1 : 0x0;
540 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
541 put_unaligned_le16(format, skb_put(skb, 2));
542 skb_put_data(skb, ver, sizeof(ver));
543 put_unaligned_le32(flags, skb_put(skb, 4));
544 skb_put_u8(skb, TASK_COMM_LEN);
545 skb_put_data(skb, hci_pi(sk)->comm, TASK_COMM_LEN);
547 __net_timestamp(skb);
549 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
550 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_OPEN);
551 if (hci_pi(sk)->hdev)
552 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
554 hdr->index = cpu_to_le16(HCI_DEV_NONE);
555 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
560 static struct sk_buff *create_monitor_ctrl_close(struct sock *sk)
562 struct hci_mon_hdr *hdr;
565 /* No message needed when cookie is not present */
566 if (!hci_pi(sk)->cookie)
569 switch (hci_pi(sk)->channel) {
570 case HCI_CHANNEL_RAW:
571 case HCI_CHANNEL_USER:
572 case HCI_CHANNEL_CONTROL:
575 /* No message for unsupported format */
579 skb = bt_skb_alloc(4, GFP_ATOMIC);
583 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
585 __net_timestamp(skb);
587 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
588 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_CLOSE);
589 if (hci_pi(sk)->hdev)
590 hdr->index = cpu_to_le16(hci_pi(sk)->hdev->id);
592 hdr->index = cpu_to_le16(HCI_DEV_NONE);
593 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
598 static struct sk_buff *create_monitor_ctrl_command(struct sock *sk, u16 index,
602 struct hci_mon_hdr *hdr;
605 skb = bt_skb_alloc(6 + len, GFP_ATOMIC);
609 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
610 put_unaligned_le16(opcode, skb_put(skb, 2));
613 skb_put_data(skb, buf, len);
615 __net_timestamp(skb);
617 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
618 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_COMMAND);
619 hdr->index = cpu_to_le16(index);
620 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
625 static void __printf(2, 3)
626 send_monitor_note(struct sock *sk, const char *fmt, ...)
629 struct hci_mon_hdr *hdr;
634 len = vsnprintf(NULL, 0, fmt, args);
637 skb = bt_skb_alloc(len + 1, GFP_ATOMIC);
642 vsprintf(skb_put(skb, len), fmt, args);
643 *(u8 *)skb_put(skb, 1) = 0;
646 __net_timestamp(skb);
648 hdr = (void *)skb_push(skb, HCI_MON_HDR_SIZE);
649 hdr->opcode = cpu_to_le16(HCI_MON_SYSTEM_NOTE);
650 hdr->index = cpu_to_le16(HCI_DEV_NONE);
651 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
653 if (sock_queue_rcv_skb(sk, skb))
657 static void send_monitor_replay(struct sock *sk)
659 struct hci_dev *hdev;
661 read_lock(&hci_dev_list_lock);
663 list_for_each_entry(hdev, &hci_dev_list, list) {
666 skb = create_monitor_event(hdev, HCI_DEV_REG);
670 if (sock_queue_rcv_skb(sk, skb))
673 if (!test_bit(HCI_RUNNING, &hdev->flags))
676 skb = create_monitor_event(hdev, HCI_DEV_OPEN);
680 if (sock_queue_rcv_skb(sk, skb))
683 if (test_bit(HCI_UP, &hdev->flags))
684 skb = create_monitor_event(hdev, HCI_DEV_UP);
685 else if (hci_dev_test_flag(hdev, HCI_SETUP))
686 skb = create_monitor_event(hdev, HCI_DEV_SETUP);
691 if (sock_queue_rcv_skb(sk, skb))
696 read_unlock(&hci_dev_list_lock);
699 static void send_monitor_control_replay(struct sock *mon_sk)
703 read_lock(&hci_sk_list.lock);
705 sk_for_each(sk, &hci_sk_list.head) {
708 skb = create_monitor_ctrl_open(sk);
712 if (sock_queue_rcv_skb(mon_sk, skb))
716 read_unlock(&hci_sk_list.lock);
719 /* Generate internal stack event */
720 static void hci_si_event(struct hci_dev *hdev, int type, int dlen, void *data)
722 struct hci_event_hdr *hdr;
723 struct hci_ev_stack_internal *ev;
726 skb = bt_skb_alloc(HCI_EVENT_HDR_SIZE + sizeof(*ev) + dlen, GFP_ATOMIC);
730 hdr = skb_put(skb, HCI_EVENT_HDR_SIZE);
731 hdr->evt = HCI_EV_STACK_INTERNAL;
732 hdr->plen = sizeof(*ev) + dlen;
734 ev = skb_put(skb, sizeof(*ev) + dlen);
736 memcpy(ev->data, data, dlen);
738 bt_cb(skb)->incoming = 1;
739 __net_timestamp(skb);
741 hci_skb_pkt_type(skb) = HCI_EVENT_PKT;
742 hci_send_to_sock(hdev, skb);
746 void hci_sock_dev_event(struct hci_dev *hdev, int event)
748 BT_DBG("hdev %s event %d", hdev->name, event);
750 if (atomic_read(&monitor_promisc)) {
753 /* Send event to monitor */
754 skb = create_monitor_event(hdev, event);
756 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
757 HCI_SOCK_TRUSTED, NULL);
762 if (event <= HCI_DEV_DOWN) {
763 struct hci_ev_si_device ev;
765 /* Send event to sockets */
767 ev.dev_id = hdev->id;
768 hci_si_event(NULL, HCI_EV_SI_DEVICE, sizeof(ev), &ev);
771 if (event == HCI_DEV_UNREG) {
774 /* Wake up sockets using this dead device */
775 read_lock(&hci_sk_list.lock);
776 sk_for_each(sk, &hci_sk_list.head) {
777 if (hci_pi(sk)->hdev == hdev) {
779 sk->sk_state_change(sk);
782 read_unlock(&hci_sk_list.lock);
786 static struct hci_mgmt_chan *__hci_mgmt_chan_find(unsigned short channel)
788 struct hci_mgmt_chan *c;
790 list_for_each_entry(c, &mgmt_chan_list, list) {
791 if (c->channel == channel)
798 static struct hci_mgmt_chan *hci_mgmt_chan_find(unsigned short channel)
800 struct hci_mgmt_chan *c;
802 mutex_lock(&mgmt_chan_list_lock);
803 c = __hci_mgmt_chan_find(channel);
804 mutex_unlock(&mgmt_chan_list_lock);
809 int hci_mgmt_chan_register(struct hci_mgmt_chan *c)
811 if (c->channel < HCI_CHANNEL_CONTROL)
814 mutex_lock(&mgmt_chan_list_lock);
815 if (__hci_mgmt_chan_find(c->channel)) {
816 mutex_unlock(&mgmt_chan_list_lock);
820 list_add_tail(&c->list, &mgmt_chan_list);
822 mutex_unlock(&mgmt_chan_list_lock);
826 EXPORT_SYMBOL(hci_mgmt_chan_register);
828 void hci_mgmt_chan_unregister(struct hci_mgmt_chan *c)
830 mutex_lock(&mgmt_chan_list_lock);
832 mutex_unlock(&mgmt_chan_list_lock);
834 EXPORT_SYMBOL(hci_mgmt_chan_unregister);
836 static int hci_sock_release(struct socket *sock)
838 struct sock *sk = sock->sk;
839 struct hci_dev *hdev;
842 BT_DBG("sock %p sk %p", sock, sk);
849 switch (hci_pi(sk)->channel) {
850 case HCI_CHANNEL_MONITOR:
851 atomic_dec(&monitor_promisc);
853 case HCI_CHANNEL_RAW:
854 case HCI_CHANNEL_USER:
855 case HCI_CHANNEL_CONTROL:
856 /* Send event to monitor */
857 skb = create_monitor_ctrl_close(sk);
859 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
860 HCI_SOCK_TRUSTED, NULL);
864 hci_sock_free_cookie(sk);
868 bt_sock_unlink(&hci_sk_list, sk);
870 hdev = hci_pi(sk)->hdev;
872 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
873 /* When releasing a user channel exclusive access,
874 * call hci_dev_do_close directly instead of calling
875 * hci_dev_close to ensure the exclusive access will
876 * be released and the controller brought back down.
878 * The checking of HCI_AUTO_OFF is not needed in this
879 * case since it will have been cleared already when
880 * opening the user channel.
882 hci_dev_do_close(hdev);
883 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
884 mgmt_index_added(hdev);
887 atomic_dec(&hdev->promisc);
897 static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg)
902 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
907 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
909 hci_dev_unlock(hdev);
914 static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg)
919 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
924 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
926 hci_dev_unlock(hdev);
931 /* Ioctls that require bound socket */
932 static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
935 struct hci_dev *hdev = hci_hdev_from_sock(sk);
938 return PTR_ERR(hdev);
940 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
943 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
946 if (hdev->dev_type != HCI_PRIMARY)
951 if (!capable(CAP_NET_ADMIN))
956 return hci_get_conn_info(hdev, (void __user *)arg);
959 return hci_get_auth_info(hdev, (void __user *)arg);
962 if (!capable(CAP_NET_ADMIN))
964 return hci_sock_reject_list_add(hdev, (void __user *)arg);
967 if (!capable(CAP_NET_ADMIN))
969 return hci_sock_reject_list_del(hdev, (void __user *)arg);
975 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
978 void __user *argp = (void __user *)arg;
979 struct sock *sk = sock->sk;
982 BT_DBG("cmd %x arg %lx", cmd, arg);
984 /* Make sure the cmd is valid before doing anything */
1003 case HCIGETCONNINFO:
1004 case HCIGETAUTHINFO:
1006 case HCIUNBLOCKADDR:
1009 return -ENOIOCTLCMD;
1014 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1019 /* When calling an ioctl on an unbound raw socket, then ensure
1020 * that the monitor gets informed. Ensure that the resulting event
1021 * is only send once by checking if the cookie exists or not. The
1022 * socket cookie will be only ever generated once for the lifetime
1023 * of a given socket.
1025 if (hci_sock_gen_cookie(sk)) {
1026 struct sk_buff *skb;
1028 /* Perform careful checks before setting the HCI_SOCK_TRUSTED
1029 * flag. Make sure that not only the current task but also
1030 * the socket opener has the required capability, since
1031 * privileged programs can be tricked into making ioctl calls
1032 * on HCI sockets, and the socket should not be marked as
1033 * trusted simply because the ioctl caller is privileged.
1035 if (sk_capable(sk, CAP_NET_ADMIN))
1036 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1038 /* Send event to monitor */
1039 skb = create_monitor_ctrl_open(sk);
1041 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1042 HCI_SOCK_TRUSTED, NULL);
1051 return hci_get_dev_list(argp);
1054 return hci_get_dev_info(argp);
1056 case HCIGETCONNLIST:
1057 return hci_get_conn_list(argp);
1060 if (!capable(CAP_NET_ADMIN))
1062 return hci_dev_open(arg);
1065 if (!capable(CAP_NET_ADMIN))
1067 return hci_dev_close(arg);
1070 if (!capable(CAP_NET_ADMIN))
1072 return hci_dev_reset(arg);
1075 if (!capable(CAP_NET_ADMIN))
1077 return hci_dev_reset_stat(arg);
1084 case HCISETLINKMODE:
1087 if (!capable(CAP_NET_ADMIN))
1089 return hci_dev_cmd(cmd, argp);
1092 return hci_inquiry(argp);
1097 err = hci_sock_bound_ioctl(sk, cmd, arg);
1104 #ifdef CONFIG_COMPAT
1105 static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
1113 return hci_sock_ioctl(sock, cmd, arg);
1116 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
1120 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
1123 struct sockaddr_hci haddr;
1124 struct sock *sk = sock->sk;
1125 struct hci_dev *hdev = NULL;
1126 struct sk_buff *skb;
1129 BT_DBG("sock %p sk %p", sock, sk);
1134 memset(&haddr, 0, sizeof(haddr));
1135 len = min_t(unsigned int, sizeof(haddr), addr_len);
1136 memcpy(&haddr, addr, len);
1138 if (haddr.hci_family != AF_BLUETOOTH)
1143 /* Allow detaching from dead device and attaching to alive device, if
1144 * the caller wants to re-bind (instead of close) this socket in
1145 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
1147 hdev = hci_pi(sk)->hdev;
1148 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1149 hci_pi(sk)->hdev = NULL;
1150 sk->sk_state = BT_OPEN;
1155 if (sk->sk_state == BT_BOUND) {
1160 switch (haddr.hci_channel) {
1161 case HCI_CHANNEL_RAW:
1162 if (hci_pi(sk)->hdev) {
1167 if (haddr.hci_dev != HCI_DEV_NONE) {
1168 hdev = hci_dev_get(haddr.hci_dev);
1174 atomic_inc(&hdev->promisc);
1177 hci_pi(sk)->channel = haddr.hci_channel;
1179 if (!hci_sock_gen_cookie(sk)) {
1180 /* In the case when a cookie has already been assigned,
1181 * then there has been already an ioctl issued against
1182 * an unbound socket and with that triggerd an open
1183 * notification. Send a close notification first to
1184 * allow the state transition to bounded.
1186 skb = create_monitor_ctrl_close(sk);
1188 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1189 HCI_SOCK_TRUSTED, NULL);
1194 if (capable(CAP_NET_ADMIN))
1195 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1197 hci_pi(sk)->hdev = hdev;
1199 /* Send event to monitor */
1200 skb = create_monitor_ctrl_open(sk);
1202 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1203 HCI_SOCK_TRUSTED, NULL);
1208 case HCI_CHANNEL_USER:
1209 if (hci_pi(sk)->hdev) {
1214 if (haddr.hci_dev == HCI_DEV_NONE) {
1219 if (!capable(CAP_NET_ADMIN)) {
1224 hdev = hci_dev_get(haddr.hci_dev);
1230 if (test_bit(HCI_INIT, &hdev->flags) ||
1231 hci_dev_test_flag(hdev, HCI_SETUP) ||
1232 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1233 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1234 test_bit(HCI_UP, &hdev->flags))) {
1240 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
1246 mgmt_index_removed(hdev);
1248 err = hci_dev_open(hdev->id);
1250 if (err == -EALREADY) {
1251 /* In case the transport is already up and
1252 * running, clear the error here.
1254 * This can happen when opening a user
1255 * channel and HCI_AUTO_OFF grace period
1260 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
1261 mgmt_index_added(hdev);
1267 hci_pi(sk)->channel = haddr.hci_channel;
1269 if (!hci_sock_gen_cookie(sk)) {
1270 /* In the case when a cookie has already been assigned,
1271 * this socket will transition from a raw socket into
1272 * a user channel socket. For a clean transition, send
1273 * the close notification first.
1275 skb = create_monitor_ctrl_close(sk);
1277 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1278 HCI_SOCK_TRUSTED, NULL);
1283 /* The user channel is restricted to CAP_NET_ADMIN
1284 * capabilities and with that implicitly trusted.
1286 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1288 hci_pi(sk)->hdev = hdev;
1290 /* Send event to monitor */
1291 skb = create_monitor_ctrl_open(sk);
1293 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1294 HCI_SOCK_TRUSTED, NULL);
1298 atomic_inc(&hdev->promisc);
1301 case HCI_CHANNEL_MONITOR:
1302 if (haddr.hci_dev != HCI_DEV_NONE) {
1307 if (!capable(CAP_NET_RAW)) {
1312 hci_pi(sk)->channel = haddr.hci_channel;
1314 /* The monitor interface is restricted to CAP_NET_RAW
1315 * capabilities and with that implicitly trusted.
1317 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1319 send_monitor_note(sk, "Linux version %s (%s)",
1320 init_utsname()->release,
1321 init_utsname()->machine);
1322 send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
1323 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
1324 send_monitor_replay(sk);
1325 send_monitor_control_replay(sk);
1327 atomic_inc(&monitor_promisc);
1330 case HCI_CHANNEL_LOGGING:
1331 if (haddr.hci_dev != HCI_DEV_NONE) {
1336 if (!capable(CAP_NET_ADMIN)) {
1341 hci_pi(sk)->channel = haddr.hci_channel;
1345 if (!hci_mgmt_chan_find(haddr.hci_channel)) {
1350 if (haddr.hci_dev != HCI_DEV_NONE) {
1355 /* Users with CAP_NET_ADMIN capabilities are allowed
1356 * access to all management commands and events. For
1357 * untrusted users the interface is restricted and
1358 * also only untrusted events are sent.
1360 if (capable(CAP_NET_ADMIN))
1361 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1363 hci_pi(sk)->channel = haddr.hci_channel;
1365 /* At the moment the index and unconfigured index events
1366 * are enabled unconditionally. Setting them on each
1367 * socket when binding keeps this functionality. They
1368 * however might be cleared later and then sending of these
1369 * events will be disabled, but that is then intentional.
1371 * This also enables generic events that are safe to be
1372 * received by untrusted users. Example for such events
1373 * are changes to settings, class of device, name etc.
1375 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
1376 if (!hci_sock_gen_cookie(sk)) {
1377 /* In the case when a cookie has already been
1378 * assigned, this socket will transtion from
1379 * a raw socket into a control socket. To
1380 * allow for a clean transtion, send the
1381 * close notification first.
1383 skb = create_monitor_ctrl_close(sk);
1385 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1386 HCI_SOCK_TRUSTED, NULL);
1391 /* Send event to monitor */
1392 skb = create_monitor_ctrl_open(sk);
1394 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1395 HCI_SOCK_TRUSTED, NULL);
1399 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
1400 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
1401 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
1402 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
1403 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
1404 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
1409 sk->sk_state = BT_BOUND;
1416 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
1419 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
1420 struct sock *sk = sock->sk;
1421 struct hci_dev *hdev;
1424 BT_DBG("sock %p sk %p", sock, sk);
1431 hdev = hci_hdev_from_sock(sk);
1433 err = PTR_ERR(hdev);
1437 haddr->hci_family = AF_BLUETOOTH;
1438 haddr->hci_dev = hdev->id;
1439 haddr->hci_channel= hci_pi(sk)->channel;
1440 err = sizeof(*haddr);
1447 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
1448 struct sk_buff *skb)
1450 __u8 mask = hci_pi(sk)->cmsg_mask;
1452 if (mask & HCI_CMSG_DIR) {
1453 int incoming = bt_cb(skb)->incoming;
1454 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
1458 if (mask & HCI_CMSG_TSTAMP) {
1459 #ifdef CONFIG_COMPAT
1460 struct old_timeval32 ctv;
1462 struct __kernel_old_timeval tv;
1466 skb_get_timestamp(skb, &tv);
1470 #ifdef CONFIG_COMPAT
1471 if (!COMPAT_USE_64BIT_TIME &&
1472 (msg->msg_flags & MSG_CMSG_COMPAT)) {
1473 ctv.tv_sec = tv.tv_sec;
1474 ctv.tv_usec = tv.tv_usec;
1480 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
1484 static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1485 size_t len, int flags)
1487 int noblock = flags & MSG_DONTWAIT;
1488 struct sock *sk = sock->sk;
1489 struct sk_buff *skb;
1491 unsigned int skblen;
1493 BT_DBG("sock %p, sk %p", sock, sk);
1495 if (flags & MSG_OOB)
1498 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
1501 if (sk->sk_state == BT_CLOSED)
1504 skb = skb_recv_datagram(sk, flags, noblock, &err);
1511 msg->msg_flags |= MSG_TRUNC;
1515 skb_reset_transport_header(skb);
1516 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1518 switch (hci_pi(sk)->channel) {
1519 case HCI_CHANNEL_RAW:
1520 hci_sock_cmsg(sk, msg, skb);
1522 case HCI_CHANNEL_USER:
1523 case HCI_CHANNEL_MONITOR:
1524 sock_recv_timestamp(msg, sk, skb);
1527 if (hci_mgmt_chan_find(hci_pi(sk)->channel))
1528 sock_recv_timestamp(msg, sk, skb);
1532 skb_free_datagram(sk, skb);
1534 if (flags & MSG_TRUNC)
1537 return err ? : copied;
1540 static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
1541 struct msghdr *msg, size_t msglen)
1545 struct mgmt_hdr *hdr;
1546 u16 opcode, index, len;
1547 struct hci_dev *hdev = NULL;
1548 const struct hci_mgmt_handler *handler;
1549 bool var_len, no_hdev;
1552 BT_DBG("got %zu bytes", msglen);
1554 if (msglen < sizeof(*hdr))
1557 buf = kmalloc(msglen, GFP_KERNEL);
1561 if (memcpy_from_msg(buf, msg, msglen)) {
1567 opcode = __le16_to_cpu(hdr->opcode);
1568 index = __le16_to_cpu(hdr->index);
1569 len = __le16_to_cpu(hdr->len);
1571 if (len != msglen - sizeof(*hdr)) {
1576 if (chan->channel == HCI_CHANNEL_CONTROL) {
1577 struct sk_buff *skb;
1579 /* Send event to monitor */
1580 skb = create_monitor_ctrl_command(sk, index, opcode, len,
1581 buf + sizeof(*hdr));
1583 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1584 HCI_SOCK_TRUSTED, NULL);
1589 if (opcode >= chan->handler_count ||
1590 chan->handlers[opcode].func == NULL) {
1591 BT_DBG("Unknown op %u", opcode);
1592 err = mgmt_cmd_status(sk, index, opcode,
1593 MGMT_STATUS_UNKNOWN_COMMAND);
1597 handler = &chan->handlers[opcode];
1599 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
1600 !(handler->flags & HCI_MGMT_UNTRUSTED)) {
1601 err = mgmt_cmd_status(sk, index, opcode,
1602 MGMT_STATUS_PERMISSION_DENIED);
1606 if (index != MGMT_INDEX_NONE) {
1607 hdev = hci_dev_get(index);
1609 err = mgmt_cmd_status(sk, index, opcode,
1610 MGMT_STATUS_INVALID_INDEX);
1614 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1615 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1616 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1617 err = mgmt_cmd_status(sk, index, opcode,
1618 MGMT_STATUS_INVALID_INDEX);
1622 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1623 !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
1624 err = mgmt_cmd_status(sk, index, opcode,
1625 MGMT_STATUS_INVALID_INDEX);
1630 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
1631 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
1632 if (no_hdev != !hdev) {
1633 err = mgmt_cmd_status(sk, index, opcode,
1634 MGMT_STATUS_INVALID_INDEX);
1639 var_len = (handler->flags & HCI_MGMT_VAR_LEN);
1640 if ((var_len && len < handler->data_len) ||
1641 (!var_len && len != handler->data_len)) {
1642 err = mgmt_cmd_status(sk, index, opcode,
1643 MGMT_STATUS_INVALID_PARAMS);
1647 if (hdev && chan->hdev_init)
1648 chan->hdev_init(sk, hdev);
1650 cp = buf + sizeof(*hdr);
1652 err = handler->func(sk, hdev, cp, len);
1666 static int hci_logging_frame(struct sock *sk, struct msghdr *msg, int len)
1668 struct hci_mon_hdr *hdr;
1669 struct sk_buff *skb;
1670 struct hci_dev *hdev;
1674 /* The logging frame consists at minimum of the standard header,
1675 * the priority byte, the ident length byte and at least one string
1676 * terminator NUL byte. Anything shorter are invalid packets.
1678 if (len < sizeof(*hdr) + 3)
1681 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
1685 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1690 hdr = (void *)skb->data;
1692 if (__le16_to_cpu(hdr->len) != len - sizeof(*hdr)) {
1697 if (__le16_to_cpu(hdr->opcode) == 0x0000) {
1698 __u8 priority = skb->data[sizeof(*hdr)];
1699 __u8 ident_len = skb->data[sizeof(*hdr) + 1];
1701 /* Only the priorities 0-7 are valid and with that any other
1702 * value results in an invalid packet.
1704 * The priority byte is followed by an ident length byte and
1705 * the NUL terminated ident string. Check that the ident
1706 * length is not overflowing the packet and also that the
1707 * ident string itself is NUL terminated. In case the ident
1708 * length is zero, the length value actually doubles as NUL
1709 * terminator identifier.
1711 * The message follows the ident string (if present) and
1712 * must be NUL terminated. Otherwise it is not a valid packet.
1714 if (priority > 7 || skb->data[len - 1] != 0x00 ||
1715 ident_len > len - sizeof(*hdr) - 3 ||
1716 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00) {
1725 index = __le16_to_cpu(hdr->index);
1727 if (index != MGMT_INDEX_NONE) {
1728 hdev = hci_dev_get(index);
1737 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
1739 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
1750 static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1753 struct sock *sk = sock->sk;
1754 struct hci_mgmt_chan *chan;
1755 struct hci_dev *hdev;
1756 struct sk_buff *skb;
1759 BT_DBG("sock %p sk %p", sock, sk);
1761 if (msg->msg_flags & MSG_OOB)
1764 if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_NOSIGNAL|MSG_ERRQUEUE|
1768 if (len < 4 || len > HCI_MAX_FRAME_SIZE)
1773 switch (hci_pi(sk)->channel) {
1774 case HCI_CHANNEL_RAW:
1775 case HCI_CHANNEL_USER:
1777 case HCI_CHANNEL_MONITOR:
1780 case HCI_CHANNEL_LOGGING:
1781 err = hci_logging_frame(sk, msg, len);
1784 mutex_lock(&mgmt_chan_list_lock);
1785 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
1787 err = hci_mgmt_cmd(chan, sk, msg, len);
1791 mutex_unlock(&mgmt_chan_list_lock);
1795 hdev = hci_hdev_from_sock(sk);
1797 err = PTR_ERR(hdev);
1801 if (!test_bit(HCI_UP, &hdev->flags)) {
1806 skb = bt_skb_send_alloc(sk, len, msg->msg_flags & MSG_DONTWAIT, &err);
1810 if (memcpy_from_msg(skb_put(skb, len), msg, len)) {
1815 hci_skb_pkt_type(skb) = skb->data[0];
1818 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
1819 /* No permission check is needed for user channel
1820 * since that gets enforced when binding the socket.
1822 * However check that the packet type is valid.
1824 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
1825 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1826 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1827 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1832 skb_queue_tail(&hdev->raw_q, skb);
1833 queue_work(hdev->workqueue, &hdev->tx_work);
1834 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
1835 u16 opcode = get_unaligned_le16(skb->data);
1836 u16 ogf = hci_opcode_ogf(opcode);
1837 u16 ocf = hci_opcode_ocf(opcode);
1839 if (((ogf > HCI_SFLT_MAX_OGF) ||
1840 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
1841 &hci_sec_filter.ocf_mask[ogf])) &&
1842 !capable(CAP_NET_RAW)) {
1847 /* Since the opcode has already been extracted here, store
1848 * a copy of the value for later use by the drivers.
1850 hci_skb_opcode(skb) = opcode;
1853 skb_queue_tail(&hdev->raw_q, skb);
1854 queue_work(hdev->workqueue, &hdev->tx_work);
1856 /* Stand-alone HCI commands must be flagged as
1857 * single-command requests.
1859 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
1861 skb_queue_tail(&hdev->cmd_q, skb);
1862 queue_work(hdev->workqueue, &hdev->cmd_work);
1865 if (!capable(CAP_NET_RAW)) {
1870 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1871 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1872 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1877 skb_queue_tail(&hdev->raw_q, skb);
1878 queue_work(hdev->workqueue, &hdev->tx_work);
1892 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
1893 sockptr_t optval, unsigned int len)
1895 struct hci_ufilter uf = { .opcode = 0 };
1896 struct sock *sk = sock->sk;
1897 int err = 0, opt = 0;
1899 BT_DBG("sk %p, opt %d", sk, optname);
1901 if (level != SOL_HCI)
1902 return -ENOPROTOOPT;
1906 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1913 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1919 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1921 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1924 case HCI_TIME_STAMP:
1925 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1931 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1933 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1938 struct hci_filter *f = &hci_pi(sk)->filter;
1940 uf.type_mask = f->type_mask;
1941 uf.opcode = f->opcode;
1942 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1943 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1946 len = min_t(unsigned int, len, sizeof(uf));
1947 if (copy_from_sockptr(&uf, optval, len)) {
1952 if (!capable(CAP_NET_RAW)) {
1953 uf.type_mask &= hci_sec_filter.type_mask;
1954 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1955 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1959 struct hci_filter *f = &hci_pi(sk)->filter;
1961 f->type_mask = uf.type_mask;
1962 f->opcode = uf.opcode;
1963 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1964 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1978 static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
1979 char __user *optval, int __user *optlen)
1981 struct hci_ufilter uf;
1982 struct sock *sk = sock->sk;
1983 int len, opt, err = 0;
1985 BT_DBG("sk %p, opt %d", sk, optname);
1987 if (level != SOL_HCI)
1988 return -ENOPROTOOPT;
1990 if (get_user(len, optlen))
1995 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
2002 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
2007 if (put_user(opt, optval))
2011 case HCI_TIME_STAMP:
2012 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
2017 if (put_user(opt, optval))
2023 struct hci_filter *f = &hci_pi(sk)->filter;
2025 memset(&uf, 0, sizeof(uf));
2026 uf.type_mask = f->type_mask;
2027 uf.opcode = f->opcode;
2028 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
2029 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
2032 len = min_t(unsigned int, len, sizeof(uf));
2033 if (copy_to_user(optval, &uf, len))
2047 static void hci_sock_destruct(struct sock *sk)
2049 skb_queue_purge(&sk->sk_receive_queue);
2050 skb_queue_purge(&sk->sk_write_queue);
2053 static const struct proto_ops hci_sock_ops = {
2054 .family = PF_BLUETOOTH,
2055 .owner = THIS_MODULE,
2056 .release = hci_sock_release,
2057 .bind = hci_sock_bind,
2058 .getname = hci_sock_getname,
2059 .sendmsg = hci_sock_sendmsg,
2060 .recvmsg = hci_sock_recvmsg,
2061 .ioctl = hci_sock_ioctl,
2062 #ifdef CONFIG_COMPAT
2063 .compat_ioctl = hci_sock_compat_ioctl,
2065 .poll = datagram_poll,
2066 .listen = sock_no_listen,
2067 .shutdown = sock_no_shutdown,
2068 .setsockopt = hci_sock_setsockopt,
2069 .getsockopt = hci_sock_getsockopt,
2070 .connect = sock_no_connect,
2071 .socketpair = sock_no_socketpair,
2072 .accept = sock_no_accept,
2073 .mmap = sock_no_mmap
2076 static struct proto hci_sk_proto = {
2078 .owner = THIS_MODULE,
2079 .obj_size = sizeof(struct hci_pinfo)
2082 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
2087 BT_DBG("sock %p", sock);
2089 if (sock->type != SOCK_RAW)
2090 return -ESOCKTNOSUPPORT;
2092 sock->ops = &hci_sock_ops;
2094 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
2098 sock_init_data(sock, sk);
2100 sock_reset_flag(sk, SOCK_ZAPPED);
2102 sk->sk_protocol = protocol;
2104 sock->state = SS_UNCONNECTED;
2105 sk->sk_state = BT_OPEN;
2106 sk->sk_destruct = hci_sock_destruct;
2108 bt_sock_link(&hci_sk_list, sk);
2112 static const struct net_proto_family hci_sock_family_ops = {
2113 .family = PF_BLUETOOTH,
2114 .owner = THIS_MODULE,
2115 .create = hci_sock_create,
2118 int __init hci_sock_init(void)
2122 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
2124 err = proto_register(&hci_sk_proto, 0);
2128 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
2130 BT_ERR("HCI socket registration failed");
2134 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
2136 BT_ERR("Failed to create HCI proc file");
2137 bt_sock_unregister(BTPROTO_HCI);
2141 BT_INFO("HCI socket layer initialized");
2146 proto_unregister(&hci_sk_proto);
2150 void hci_sock_cleanup(void)
2152 bt_procfs_cleanup(&init_net, "hci");
2153 bt_sock_unregister(BTPROTO_HCI);
2154 proto_unregister(&hci_sk_proto);