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];
63 static struct hci_dev *hci_hdev_from_sock(struct sock *sk)
65 struct hci_dev *hdev = hci_pi(sk)->hdev;
68 return ERR_PTR(-EBADFD);
69 if (hci_dev_test_flag(hdev, HCI_UNREGISTER))
70 return ERR_PTR(-EPIPE);
74 void hci_sock_set_flag(struct sock *sk, int nr)
76 set_bit(nr, &hci_pi(sk)->flags);
79 void hci_sock_clear_flag(struct sock *sk, int nr)
81 clear_bit(nr, &hci_pi(sk)->flags);
84 int hci_sock_test_flag(struct sock *sk, int nr)
86 return test_bit(nr, &hci_pi(sk)->flags);
89 unsigned short hci_sock_get_channel(struct sock *sk)
91 return hci_pi(sk)->channel;
94 u32 hci_sock_get_cookie(struct sock *sk)
96 return hci_pi(sk)->cookie;
99 static bool hci_sock_gen_cookie(struct sock *sk)
101 int id = hci_pi(sk)->cookie;
104 id = ida_simple_get(&sock_cookie_ida, 1, 0, GFP_KERNEL);
108 hci_pi(sk)->cookie = id;
109 get_task_comm(hci_pi(sk)->comm, current);
116 static void hci_sock_free_cookie(struct sock *sk)
118 int id = hci_pi(sk)->cookie;
121 hci_pi(sk)->cookie = 0xffffffff;
122 ida_simple_remove(&sock_cookie_ida, id);
126 static inline int hci_test_bit(int nr, const void *addr)
128 return *((const __u32 *) addr + (nr >> 5)) & ((__u32) 1 << (nr & 31));
131 /* Security filter */
132 #define HCI_SFLT_MAX_OGF 5
134 struct hci_sec_filter {
137 __u32 ocf_mask[HCI_SFLT_MAX_OGF + 1][4];
140 static const struct hci_sec_filter hci_sec_filter = {
144 { 0x1000d9fe, 0x0000b00c },
149 { 0xbe000006, 0x00000001, 0x00000000, 0x00 },
150 /* OGF_LINK_POLICY */
151 { 0x00005200, 0x00000000, 0x00000000, 0x00 },
153 { 0xaab00200, 0x2b402aaa, 0x05220154, 0x00 },
155 { 0x000002be, 0x00000000, 0x00000000, 0x00 },
156 /* OGF_STATUS_PARAM */
157 { 0x000000ea, 0x00000000, 0x00000000, 0x00 }
161 static struct bt_sock_list hci_sk_list = {
162 .lock = __RW_LOCK_UNLOCKED(hci_sk_list.lock)
165 static bool is_filtered_packet(struct sock *sk, struct sk_buff *skb)
167 struct hci_filter *flt;
168 int flt_type, flt_event;
171 flt = &hci_pi(sk)->filter;
173 flt_type = hci_skb_pkt_type(skb) & HCI_FLT_TYPE_BITS;
175 if (!test_bit(flt_type, &flt->type_mask))
178 /* Extra filter for event packets only */
179 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT)
182 flt_event = (*(__u8 *)skb->data & HCI_FLT_EVENT_BITS);
184 if (!hci_test_bit(flt_event, &flt->event_mask))
187 /* Check filter only when opcode is set */
191 if (flt_event == HCI_EV_CMD_COMPLETE &&
192 flt->opcode != get_unaligned((__le16 *)(skb->data + 3)))
195 if (flt_event == HCI_EV_CMD_STATUS &&
196 flt->opcode != get_unaligned((__le16 *)(skb->data + 4)))
202 /* Send frame to RAW socket */
203 void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
206 struct sk_buff *skb_copy = NULL;
208 BT_DBG("hdev %p len %d", hdev, skb->len);
210 read_lock(&hci_sk_list.lock);
212 sk_for_each(sk, &hci_sk_list.head) {
213 struct sk_buff *nskb;
215 if (sk->sk_state != BT_BOUND || hci_pi(sk)->hdev != hdev)
218 /* Don't send frame to the socket it came from */
222 if (hci_pi(sk)->channel == HCI_CHANNEL_RAW) {
223 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
224 hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
225 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
226 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
227 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
229 if (is_filtered_packet(sk, skb))
231 } else if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
232 if (!bt_cb(skb)->incoming)
234 if (hci_skb_pkt_type(skb) != HCI_EVENT_PKT &&
235 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
236 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
237 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT)
240 /* Don't send frame to other channel types */
245 /* Create a private copy with headroom */
246 skb_copy = __pskb_copy_fclone(skb, 1, GFP_ATOMIC, true);
250 /* Put type byte before the data */
251 memcpy(skb_push(skb_copy, 1), &hci_skb_pkt_type(skb), 1);
254 nskb = skb_clone(skb_copy, GFP_ATOMIC);
258 if (sock_queue_rcv_skb(sk, nskb))
262 read_unlock(&hci_sk_list.lock);
267 /* Send frame to sockets with specific channel */
268 static void __hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
269 int flag, struct sock *skip_sk)
273 BT_DBG("channel %u len %d", channel, skb->len);
275 sk_for_each(sk, &hci_sk_list.head) {
276 struct sk_buff *nskb;
278 /* Ignore socket without the flag set */
279 if (!hci_sock_test_flag(sk, flag))
282 /* Skip the original socket */
286 if (sk->sk_state != BT_BOUND)
289 if (hci_pi(sk)->channel != channel)
292 nskb = skb_clone(skb, GFP_ATOMIC);
296 if (sock_queue_rcv_skb(sk, nskb))
302 void hci_send_to_channel(unsigned short channel, struct sk_buff *skb,
303 int flag, struct sock *skip_sk)
305 read_lock(&hci_sk_list.lock);
306 __hci_send_to_channel(channel, skb, flag, skip_sk);
307 read_unlock(&hci_sk_list.lock);
310 /* Send frame to monitor socket */
311 void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
313 struct sk_buff *skb_copy = NULL;
314 struct hci_mon_hdr *hdr;
317 if (!atomic_read(&monitor_promisc))
320 BT_DBG("hdev %p len %d", hdev, skb->len);
322 switch (hci_skb_pkt_type(skb)) {
323 case HCI_COMMAND_PKT:
324 opcode = cpu_to_le16(HCI_MON_COMMAND_PKT);
327 opcode = cpu_to_le16(HCI_MON_EVENT_PKT);
329 case HCI_ACLDATA_PKT:
330 if (bt_cb(skb)->incoming)
331 opcode = cpu_to_le16(HCI_MON_ACL_RX_PKT);
333 opcode = cpu_to_le16(HCI_MON_ACL_TX_PKT);
335 case HCI_SCODATA_PKT:
336 if (bt_cb(skb)->incoming)
337 opcode = cpu_to_le16(HCI_MON_SCO_RX_PKT);
339 opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
341 case HCI_ISODATA_PKT:
342 if (bt_cb(skb)->incoming)
343 opcode = cpu_to_le16(HCI_MON_ISO_RX_PKT);
345 opcode = cpu_to_le16(HCI_MON_ISO_TX_PKT);
348 opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
354 /* Create a private copy with headroom */
355 skb_copy = __pskb_copy_fclone(skb, HCI_MON_HDR_SIZE, GFP_ATOMIC, true);
359 /* Put header before the data */
360 hdr = skb_push(skb_copy, HCI_MON_HDR_SIZE);
361 hdr->opcode = opcode;
362 hdr->index = cpu_to_le16(hdev->id);
363 hdr->len = cpu_to_le16(skb->len);
365 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb_copy,
366 HCI_SOCK_TRUSTED, NULL);
370 void hci_send_monitor_ctrl_event(struct hci_dev *hdev, u16 event,
371 void *data, u16 data_len, ktime_t tstamp,
372 int flag, struct sock *skip_sk)
378 index = cpu_to_le16(hdev->id);
380 index = cpu_to_le16(MGMT_INDEX_NONE);
382 read_lock(&hci_sk_list.lock);
384 sk_for_each(sk, &hci_sk_list.head) {
385 struct hci_mon_hdr *hdr;
388 if (hci_pi(sk)->channel != HCI_CHANNEL_CONTROL)
391 /* Ignore socket without the flag set */
392 if (!hci_sock_test_flag(sk, flag))
395 /* Skip the original socket */
399 skb = bt_skb_alloc(6 + data_len, GFP_ATOMIC);
403 put_unaligned_le32(hci_pi(sk)->cookie, skb_put(skb, 4));
404 put_unaligned_le16(event, skb_put(skb, 2));
407 skb_put_data(skb, data, data_len);
409 skb->tstamp = tstamp;
411 hdr = skb_push(skb, HCI_MON_HDR_SIZE);
412 hdr->opcode = cpu_to_le16(HCI_MON_CTRL_EVENT);
414 hdr->len = cpu_to_le16(skb->len - HCI_MON_HDR_SIZE);
416 __hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
417 HCI_SOCK_TRUSTED, NULL);
421 read_unlock(&hci_sk_list.lock);
424 static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
426 struct hci_mon_hdr *hdr;
427 struct hci_mon_new_index *ni;
428 struct hci_mon_index_info *ii;
434 skb = bt_skb_alloc(HCI_MON_NEW_INDEX_SIZE, GFP_ATOMIC);
438 ni = skb_put(skb, HCI_MON_NEW_INDEX_SIZE);
439 ni->type = hdev->dev_type;
441 bacpy(&ni->bdaddr, &hdev->bdaddr);
442 memcpy(ni->name, hdev->name, 8);
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 !hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
874 /* When releasing a user channel exclusive access,
875 * call hci_dev_do_close directly instead of calling
876 * hci_dev_close to ensure the exclusive access will
877 * be released and the controller brought back down.
879 * The checking of HCI_AUTO_OFF is not needed in this
880 * case since it will have been cleared already when
881 * opening the user channel.
883 * Make sure to also check that we haven't already
884 * unregistered since all the cleanup will have already
885 * been complete and hdev will get released when we put
888 hci_dev_do_close(hdev);
889 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
890 hci_register_suspend_notifier(hdev);
891 mgmt_index_added(hdev);
894 atomic_dec(&hdev->promisc);
904 static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg)
909 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
914 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
916 hci_dev_unlock(hdev);
921 static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg)
926 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
931 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
933 hci_dev_unlock(hdev);
938 /* Ioctls that require bound socket */
939 static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
942 struct hci_dev *hdev = hci_hdev_from_sock(sk);
945 return PTR_ERR(hdev);
947 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
950 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
953 if (hdev->dev_type != HCI_PRIMARY)
958 if (!capable(CAP_NET_ADMIN))
963 return hci_get_conn_info(hdev, (void __user *)arg);
966 return hci_get_auth_info(hdev, (void __user *)arg);
969 if (!capable(CAP_NET_ADMIN))
971 return hci_sock_reject_list_add(hdev, (void __user *)arg);
974 if (!capable(CAP_NET_ADMIN))
976 return hci_sock_reject_list_del(hdev, (void __user *)arg);
982 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
985 void __user *argp = (void __user *)arg;
986 struct sock *sk = sock->sk;
989 BT_DBG("cmd %x arg %lx", cmd, arg);
993 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
998 /* When calling an ioctl on an unbound raw socket, then ensure
999 * that the monitor gets informed. Ensure that the resulting event
1000 * is only send once by checking if the cookie exists or not. The
1001 * socket cookie will be only ever generated once for the lifetime
1002 * of a given socket.
1004 if (hci_sock_gen_cookie(sk)) {
1005 struct sk_buff *skb;
1007 if (capable(CAP_NET_ADMIN))
1008 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1010 /* Send event to monitor */
1011 skb = create_monitor_ctrl_open(sk);
1013 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1014 HCI_SOCK_TRUSTED, NULL);
1023 return hci_get_dev_list(argp);
1026 return hci_get_dev_info(argp);
1028 case HCIGETCONNLIST:
1029 return hci_get_conn_list(argp);
1032 if (!capable(CAP_NET_ADMIN))
1034 return hci_dev_open(arg);
1037 if (!capable(CAP_NET_ADMIN))
1039 return hci_dev_close(arg);
1042 if (!capable(CAP_NET_ADMIN))
1044 return hci_dev_reset(arg);
1047 if (!capable(CAP_NET_ADMIN))
1049 return hci_dev_reset_stat(arg);
1056 case HCISETLINKMODE:
1059 if (!capable(CAP_NET_ADMIN))
1061 return hci_dev_cmd(cmd, argp);
1064 return hci_inquiry(argp);
1069 err = hci_sock_bound_ioctl(sk, cmd, arg);
1076 #ifdef CONFIG_COMPAT
1077 static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
1085 return hci_sock_ioctl(sock, cmd, arg);
1088 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
1092 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
1095 struct sockaddr_hci haddr;
1096 struct sock *sk = sock->sk;
1097 struct hci_dev *hdev = NULL;
1098 struct sk_buff *skb;
1101 BT_DBG("sock %p sk %p", sock, sk);
1106 memset(&haddr, 0, sizeof(haddr));
1107 len = min_t(unsigned int, sizeof(haddr), addr_len);
1108 memcpy(&haddr, addr, len);
1110 if (haddr.hci_family != AF_BLUETOOTH)
1115 /* Allow detaching from dead device and attaching to alive device, if
1116 * the caller wants to re-bind (instead of close) this socket in
1117 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
1119 hdev = hci_pi(sk)->hdev;
1120 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1121 hci_pi(sk)->hdev = NULL;
1122 sk->sk_state = BT_OPEN;
1127 if (sk->sk_state == BT_BOUND) {
1132 switch (haddr.hci_channel) {
1133 case HCI_CHANNEL_RAW:
1134 if (hci_pi(sk)->hdev) {
1139 if (haddr.hci_dev != HCI_DEV_NONE) {
1140 hdev = hci_dev_get(haddr.hci_dev);
1146 atomic_inc(&hdev->promisc);
1149 hci_pi(sk)->channel = haddr.hci_channel;
1151 if (!hci_sock_gen_cookie(sk)) {
1152 /* In the case when a cookie has already been assigned,
1153 * then there has been already an ioctl issued against
1154 * an unbound socket and with that triggered an open
1155 * notification. Send a close notification first to
1156 * allow the state transition to bounded.
1158 skb = create_monitor_ctrl_close(sk);
1160 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1161 HCI_SOCK_TRUSTED, NULL);
1166 if (capable(CAP_NET_ADMIN))
1167 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1169 hci_pi(sk)->hdev = hdev;
1171 /* Send event to monitor */
1172 skb = create_monitor_ctrl_open(sk);
1174 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1175 HCI_SOCK_TRUSTED, NULL);
1180 case HCI_CHANNEL_USER:
1181 if (hci_pi(sk)->hdev) {
1186 if (haddr.hci_dev == HCI_DEV_NONE) {
1191 if (!capable(CAP_NET_ADMIN)) {
1196 hdev = hci_dev_get(haddr.hci_dev);
1202 if (test_bit(HCI_INIT, &hdev->flags) ||
1203 hci_dev_test_flag(hdev, HCI_SETUP) ||
1204 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1205 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1206 test_bit(HCI_UP, &hdev->flags))) {
1212 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
1218 mgmt_index_removed(hdev);
1219 hci_unregister_suspend_notifier(hdev);
1221 err = hci_dev_open(hdev->id);
1223 if (err == -EALREADY) {
1224 /* In case the transport is already up and
1225 * running, clear the error here.
1227 * This can happen when opening a user
1228 * channel and HCI_AUTO_OFF grace period
1233 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
1234 hci_register_suspend_notifier(hdev);
1235 mgmt_index_added(hdev);
1241 hci_pi(sk)->channel = haddr.hci_channel;
1243 if (!hci_sock_gen_cookie(sk)) {
1244 /* In the case when a cookie has already been assigned,
1245 * this socket will transition from a raw socket into
1246 * a user channel socket. For a clean transition, send
1247 * the close notification first.
1249 skb = create_monitor_ctrl_close(sk);
1251 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1252 HCI_SOCK_TRUSTED, NULL);
1257 /* The user channel is restricted to CAP_NET_ADMIN
1258 * capabilities and with that implicitly trusted.
1260 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1262 hci_pi(sk)->hdev = hdev;
1264 /* Send event to monitor */
1265 skb = create_monitor_ctrl_open(sk);
1267 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1268 HCI_SOCK_TRUSTED, NULL);
1272 atomic_inc(&hdev->promisc);
1275 case HCI_CHANNEL_MONITOR:
1276 if (haddr.hci_dev != HCI_DEV_NONE) {
1281 if (!capable(CAP_NET_RAW)) {
1286 hci_pi(sk)->channel = haddr.hci_channel;
1288 /* The monitor interface is restricted to CAP_NET_RAW
1289 * capabilities and with that implicitly trusted.
1291 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1293 send_monitor_note(sk, "Linux version %s (%s)",
1294 init_utsname()->release,
1295 init_utsname()->machine);
1296 send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
1297 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
1298 send_monitor_replay(sk);
1299 send_monitor_control_replay(sk);
1301 atomic_inc(&monitor_promisc);
1304 case HCI_CHANNEL_LOGGING:
1305 if (haddr.hci_dev != HCI_DEV_NONE) {
1310 if (!capable(CAP_NET_ADMIN)) {
1315 hci_pi(sk)->channel = haddr.hci_channel;
1319 if (!hci_mgmt_chan_find(haddr.hci_channel)) {
1324 if (haddr.hci_dev != HCI_DEV_NONE) {
1329 /* Users with CAP_NET_ADMIN capabilities are allowed
1330 * access to all management commands and events. For
1331 * untrusted users the interface is restricted and
1332 * also only untrusted events are sent.
1334 if (capable(CAP_NET_ADMIN))
1335 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1337 hci_pi(sk)->channel = haddr.hci_channel;
1339 /* At the moment the index and unconfigured index events
1340 * are enabled unconditionally. Setting them on each
1341 * socket when binding keeps this functionality. They
1342 * however might be cleared later and then sending of these
1343 * events will be disabled, but that is then intentional.
1345 * This also enables generic events that are safe to be
1346 * received by untrusted users. Example for such events
1347 * are changes to settings, class of device, name etc.
1349 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
1350 if (!hci_sock_gen_cookie(sk)) {
1351 /* In the case when a cookie has already been
1352 * assigned, this socket will transition from
1353 * a raw socket into a control socket. To
1354 * allow for a clean transition, send the
1355 * close notification first.
1357 skb = create_monitor_ctrl_close(sk);
1359 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1360 HCI_SOCK_TRUSTED, NULL);
1365 /* Send event to monitor */
1366 skb = create_monitor_ctrl_open(sk);
1368 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1369 HCI_SOCK_TRUSTED, NULL);
1373 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
1374 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
1375 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
1376 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
1377 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
1378 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
1383 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */
1384 if (!hci_pi(sk)->mtu)
1385 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE;
1387 sk->sk_state = BT_BOUND;
1394 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
1397 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
1398 struct sock *sk = sock->sk;
1399 struct hci_dev *hdev;
1402 BT_DBG("sock %p sk %p", sock, sk);
1409 hdev = hci_hdev_from_sock(sk);
1411 err = PTR_ERR(hdev);
1415 haddr->hci_family = AF_BLUETOOTH;
1416 haddr->hci_dev = hdev->id;
1417 haddr->hci_channel= hci_pi(sk)->channel;
1418 err = sizeof(*haddr);
1425 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
1426 struct sk_buff *skb)
1428 __u8 mask = hci_pi(sk)->cmsg_mask;
1430 if (mask & HCI_CMSG_DIR) {
1431 int incoming = bt_cb(skb)->incoming;
1432 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
1436 if (mask & HCI_CMSG_TSTAMP) {
1437 #ifdef CONFIG_COMPAT
1438 struct old_timeval32 ctv;
1440 struct __kernel_old_timeval tv;
1444 skb_get_timestamp(skb, &tv);
1448 #ifdef CONFIG_COMPAT
1449 if (!COMPAT_USE_64BIT_TIME &&
1450 (msg->msg_flags & MSG_CMSG_COMPAT)) {
1451 ctv.tv_sec = tv.tv_sec;
1452 ctv.tv_usec = tv.tv_usec;
1458 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
1462 static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1463 size_t len, int flags)
1465 struct sock *sk = sock->sk;
1466 struct sk_buff *skb;
1468 unsigned int skblen;
1470 BT_DBG("sock %p, sk %p", sock, sk);
1472 if (flags & MSG_OOB)
1475 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
1478 if (sk->sk_state == BT_CLOSED)
1481 skb = skb_recv_datagram(sk, flags, &err);
1488 msg->msg_flags |= MSG_TRUNC;
1492 skb_reset_transport_header(skb);
1493 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1495 switch (hci_pi(sk)->channel) {
1496 case HCI_CHANNEL_RAW:
1497 hci_sock_cmsg(sk, msg, skb);
1499 case HCI_CHANNEL_USER:
1500 case HCI_CHANNEL_MONITOR:
1501 sock_recv_timestamp(msg, sk, skb);
1504 if (hci_mgmt_chan_find(hci_pi(sk)->channel))
1505 sock_recv_timestamp(msg, sk, skb);
1509 skb_free_datagram(sk, skb);
1511 if (flags & MSG_TRUNC)
1514 return err ? : copied;
1517 static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
1518 struct sk_buff *skb)
1521 struct mgmt_hdr *hdr;
1522 u16 opcode, index, len;
1523 struct hci_dev *hdev = NULL;
1524 const struct hci_mgmt_handler *handler;
1525 bool var_len, no_hdev;
1528 BT_DBG("got %d bytes", skb->len);
1530 if (skb->len < sizeof(*hdr))
1533 hdr = (void *)skb->data;
1534 opcode = __le16_to_cpu(hdr->opcode);
1535 index = __le16_to_cpu(hdr->index);
1536 len = __le16_to_cpu(hdr->len);
1538 if (len != skb->len - sizeof(*hdr)) {
1543 if (chan->channel == HCI_CHANNEL_CONTROL) {
1544 struct sk_buff *cmd;
1546 /* Send event to monitor */
1547 cmd = create_monitor_ctrl_command(sk, index, opcode, len,
1548 skb->data + sizeof(*hdr));
1550 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd,
1551 HCI_SOCK_TRUSTED, NULL);
1556 if (opcode >= chan->handler_count ||
1557 chan->handlers[opcode].func == NULL) {
1558 BT_DBG("Unknown op %u", opcode);
1559 err = mgmt_cmd_status(sk, index, opcode,
1560 MGMT_STATUS_UNKNOWN_COMMAND);
1564 handler = &chan->handlers[opcode];
1566 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
1567 !(handler->flags & HCI_MGMT_UNTRUSTED)) {
1568 err = mgmt_cmd_status(sk, index, opcode,
1569 MGMT_STATUS_PERMISSION_DENIED);
1573 if (index != MGMT_INDEX_NONE) {
1574 hdev = hci_dev_get(index);
1576 err = mgmt_cmd_status(sk, index, opcode,
1577 MGMT_STATUS_INVALID_INDEX);
1581 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1582 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1583 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1584 err = mgmt_cmd_status(sk, index, opcode,
1585 MGMT_STATUS_INVALID_INDEX);
1589 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1590 !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
1591 err = mgmt_cmd_status(sk, index, opcode,
1592 MGMT_STATUS_INVALID_INDEX);
1597 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
1598 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
1599 if (no_hdev != !hdev) {
1600 err = mgmt_cmd_status(sk, index, opcode,
1601 MGMT_STATUS_INVALID_INDEX);
1606 var_len = (handler->flags & HCI_MGMT_VAR_LEN);
1607 if ((var_len && len < handler->data_len) ||
1608 (!var_len && len != handler->data_len)) {
1609 err = mgmt_cmd_status(sk, index, opcode,
1610 MGMT_STATUS_INVALID_PARAMS);
1614 if (hdev && chan->hdev_init)
1615 chan->hdev_init(sk, hdev);
1617 cp = skb->data + sizeof(*hdr);
1619 err = handler->func(sk, hdev, cp, len);
1632 static int hci_logging_frame(struct sock *sk, struct sk_buff *skb,
1635 struct hci_mon_hdr *hdr;
1636 struct hci_dev *hdev;
1640 /* The logging frame consists at minimum of the standard header,
1641 * the priority byte, the ident length byte and at least one string
1642 * terminator NUL byte. Anything shorter are invalid packets.
1644 if (skb->len < sizeof(*hdr) + 3)
1647 hdr = (void *)skb->data;
1649 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr))
1652 if (__le16_to_cpu(hdr->opcode) == 0x0000) {
1653 __u8 priority = skb->data[sizeof(*hdr)];
1654 __u8 ident_len = skb->data[sizeof(*hdr) + 1];
1656 /* Only the priorities 0-7 are valid and with that any other
1657 * value results in an invalid packet.
1659 * The priority byte is followed by an ident length byte and
1660 * the NUL terminated ident string. Check that the ident
1661 * length is not overflowing the packet and also that the
1662 * ident string itself is NUL terminated. In case the ident
1663 * length is zero, the length value actually doubles as NUL
1664 * terminator identifier.
1666 * The message follows the ident string (if present) and
1667 * must be NUL terminated. Otherwise it is not a valid packet.
1669 if (priority > 7 || skb->data[skb->len - 1] != 0x00 ||
1670 ident_len > skb->len - sizeof(*hdr) - 3 ||
1671 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00)
1677 index = __le16_to_cpu(hdr->index);
1679 if (index != MGMT_INDEX_NONE) {
1680 hdev = hci_dev_get(index);
1687 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
1689 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
1698 static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1701 struct sock *sk = sock->sk;
1702 struct hci_mgmt_chan *chan;
1703 struct hci_dev *hdev;
1704 struct sk_buff *skb;
1706 const unsigned int flags = msg->msg_flags;
1708 BT_DBG("sock %p sk %p", sock, sk);
1710 if (flags & MSG_OOB)
1713 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT))
1716 if (len < 4 || len > hci_pi(sk)->mtu)
1719 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
1721 return PTR_ERR(skb);
1725 switch (hci_pi(sk)->channel) {
1726 case HCI_CHANNEL_RAW:
1727 case HCI_CHANNEL_USER:
1729 case HCI_CHANNEL_MONITOR:
1732 case HCI_CHANNEL_LOGGING:
1733 err = hci_logging_frame(sk, skb, flags);
1736 mutex_lock(&mgmt_chan_list_lock);
1737 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
1739 err = hci_mgmt_cmd(chan, sk, skb);
1743 mutex_unlock(&mgmt_chan_list_lock);
1747 hdev = hci_hdev_from_sock(sk);
1749 err = PTR_ERR(hdev);
1753 if (!test_bit(HCI_UP, &hdev->flags)) {
1758 hci_skb_pkt_type(skb) = skb->data[0];
1761 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
1762 /* No permission check is needed for user channel
1763 * since that gets enforced when binding the socket.
1765 * However check that the packet type is valid.
1767 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
1768 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1769 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1770 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1775 skb_queue_tail(&hdev->raw_q, skb);
1776 queue_work(hdev->workqueue, &hdev->tx_work);
1777 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
1778 u16 opcode = get_unaligned_le16(skb->data);
1779 u16 ogf = hci_opcode_ogf(opcode);
1780 u16 ocf = hci_opcode_ocf(opcode);
1782 if (((ogf > HCI_SFLT_MAX_OGF) ||
1783 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
1784 &hci_sec_filter.ocf_mask[ogf])) &&
1785 !capable(CAP_NET_RAW)) {
1790 /* Since the opcode has already been extracted here, store
1791 * a copy of the value for later use by the drivers.
1793 hci_skb_opcode(skb) = opcode;
1796 skb_queue_tail(&hdev->raw_q, skb);
1797 queue_work(hdev->workqueue, &hdev->tx_work);
1799 /* Stand-alone HCI commands must be flagged as
1800 * single-command requests.
1802 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
1804 skb_queue_tail(&hdev->cmd_q, skb);
1805 queue_work(hdev->workqueue, &hdev->cmd_work);
1808 if (!capable(CAP_NET_RAW)) {
1813 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1814 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1815 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1820 skb_queue_tail(&hdev->raw_q, skb);
1821 queue_work(hdev->workqueue, &hdev->tx_work);
1835 static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
1836 sockptr_t optval, unsigned int len)
1838 struct hci_ufilter uf = { .opcode = 0 };
1839 struct sock *sk = sock->sk;
1840 int err = 0, opt = 0;
1842 BT_DBG("sk %p, opt %d", sk, optname);
1846 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1853 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1859 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1861 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1864 case HCI_TIME_STAMP:
1865 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1871 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1873 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1878 struct hci_filter *f = &hci_pi(sk)->filter;
1880 uf.type_mask = f->type_mask;
1881 uf.opcode = f->opcode;
1882 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1883 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1886 len = min_t(unsigned int, len, sizeof(uf));
1887 if (copy_from_sockptr(&uf, optval, len)) {
1892 if (!capable(CAP_NET_RAW)) {
1893 uf.type_mask &= hci_sec_filter.type_mask;
1894 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1895 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1899 struct hci_filter *f = &hci_pi(sk)->filter;
1901 f->type_mask = uf.type_mask;
1902 f->opcode = uf.opcode;
1903 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1904 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1918 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
1919 sockptr_t optval, unsigned int len)
1921 struct sock *sk = sock->sk;
1925 BT_DBG("sk %p, opt %d", sk, optname);
1927 if (level == SOL_HCI)
1928 return hci_sock_setsockopt_old(sock, level, optname, optval,
1931 if (level != SOL_BLUETOOTH)
1932 return -ENOPROTOOPT;
1939 switch (hci_pi(sk)->channel) {
1940 /* Don't allow changing MTU for channels that are meant for HCI
1943 case HCI_CHANNEL_RAW:
1944 case HCI_CHANNEL_USER:
1949 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1954 hci_pi(sk)->mtu = opt;
1967 static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname,
1968 char __user *optval, int __user *optlen)
1970 struct hci_ufilter uf;
1971 struct sock *sk = sock->sk;
1972 int len, opt, err = 0;
1974 BT_DBG("sk %p, opt %d", sk, optname);
1976 if (get_user(len, optlen))
1981 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1988 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
1993 if (put_user(opt, optval))
1997 case HCI_TIME_STAMP:
1998 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
2003 if (put_user(opt, optval))
2009 struct hci_filter *f = &hci_pi(sk)->filter;
2011 memset(&uf, 0, sizeof(uf));
2012 uf.type_mask = f->type_mask;
2013 uf.opcode = f->opcode;
2014 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
2015 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
2018 len = min_t(unsigned int, len, sizeof(uf));
2019 if (copy_to_user(optval, &uf, len))
2033 static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
2034 char __user *optval, int __user *optlen)
2036 struct sock *sk = sock->sk;
2039 BT_DBG("sk %p, opt %d", sk, optname);
2041 if (level == SOL_HCI)
2042 return hci_sock_getsockopt_old(sock, level, optname, optval,
2045 if (level != SOL_BLUETOOTH)
2046 return -ENOPROTOOPT;
2053 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval))
2066 static void hci_sock_destruct(struct sock *sk)
2068 skb_queue_purge(&sk->sk_receive_queue);
2069 skb_queue_purge(&sk->sk_write_queue);
2072 static const struct proto_ops hci_sock_ops = {
2073 .family = PF_BLUETOOTH,
2074 .owner = THIS_MODULE,
2075 .release = hci_sock_release,
2076 .bind = hci_sock_bind,
2077 .getname = hci_sock_getname,
2078 .sendmsg = hci_sock_sendmsg,
2079 .recvmsg = hci_sock_recvmsg,
2080 .ioctl = hci_sock_ioctl,
2081 #ifdef CONFIG_COMPAT
2082 .compat_ioctl = hci_sock_compat_ioctl,
2084 .poll = datagram_poll,
2085 .listen = sock_no_listen,
2086 .shutdown = sock_no_shutdown,
2087 .setsockopt = hci_sock_setsockopt,
2088 .getsockopt = hci_sock_getsockopt,
2089 .connect = sock_no_connect,
2090 .socketpair = sock_no_socketpair,
2091 .accept = sock_no_accept,
2092 .mmap = sock_no_mmap
2095 static struct proto hci_sk_proto = {
2097 .owner = THIS_MODULE,
2098 .obj_size = sizeof(struct hci_pinfo)
2101 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
2106 BT_DBG("sock %p", sock);
2108 if (sock->type != SOCK_RAW)
2109 return -ESOCKTNOSUPPORT;
2111 sock->ops = &hci_sock_ops;
2113 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
2117 sock_init_data(sock, sk);
2119 sock_reset_flag(sk, SOCK_ZAPPED);
2121 sk->sk_protocol = protocol;
2123 sock->state = SS_UNCONNECTED;
2124 sk->sk_state = BT_OPEN;
2125 sk->sk_destruct = hci_sock_destruct;
2127 bt_sock_link(&hci_sk_list, sk);
2131 static const struct net_proto_family hci_sock_family_ops = {
2132 .family = PF_BLUETOOTH,
2133 .owner = THIS_MODULE,
2134 .create = hci_sock_create,
2137 int __init hci_sock_init(void)
2141 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
2143 err = proto_register(&hci_sk_proto, 0);
2147 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
2149 BT_ERR("HCI socket registration failed");
2153 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
2155 BT_ERR("Failed to create HCI proc file");
2156 bt_sock_unregister(BTPROTO_HCI);
2160 BT_INFO("HCI socket layer initialized");
2165 proto_unregister(&hci_sk_proto);
2169 void hci_sock_cleanup(void)
2171 bt_procfs_cleanup(&init_net, "hci");
2172 bt_sock_unregister(BTPROTO_HCI);
2173 proto_unregister(&hci_sk_proto);