2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
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 /* 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);
986 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
991 /* When calling an ioctl on an unbound raw socket, then ensure
992 * that the monitor gets informed. Ensure that the resulting event
993 * is only send once by checking if the cookie exists or not. The
994 * socket cookie will be only ever generated once for the lifetime
997 if (hci_sock_gen_cookie(sk)) {
1000 if (capable(CAP_NET_ADMIN))
1001 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1003 /* Send event to monitor */
1004 skb = create_monitor_ctrl_open(sk);
1006 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1007 HCI_SOCK_TRUSTED, NULL);
1016 return hci_get_dev_list(argp);
1019 return hci_get_dev_info(argp);
1021 case HCIGETCONNLIST:
1022 return hci_get_conn_list(argp);
1025 if (!capable(CAP_NET_ADMIN))
1027 return hci_dev_open(arg);
1030 if (!capable(CAP_NET_ADMIN))
1032 return hci_dev_close(arg);
1035 if (!capable(CAP_NET_ADMIN))
1037 return hci_dev_reset(arg);
1040 if (!capable(CAP_NET_ADMIN))
1042 return hci_dev_reset_stat(arg);
1049 case HCISETLINKMODE:
1052 if (!capable(CAP_NET_ADMIN))
1054 return hci_dev_cmd(cmd, argp);
1057 return hci_inquiry(argp);
1062 err = hci_sock_bound_ioctl(sk, cmd, arg);
1069 #ifdef CONFIG_COMPAT
1070 static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
1078 return hci_sock_ioctl(sock, cmd, arg);
1081 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
1085 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
1088 struct sockaddr_hci haddr;
1089 struct sock *sk = sock->sk;
1090 struct hci_dev *hdev = NULL;
1091 struct sk_buff *skb;
1094 BT_DBG("sock %p sk %p", sock, sk);
1099 memset(&haddr, 0, sizeof(haddr));
1100 len = min_t(unsigned int, sizeof(haddr), addr_len);
1101 memcpy(&haddr, addr, len);
1103 if (haddr.hci_family != AF_BLUETOOTH)
1108 /* Allow detaching from dead device and attaching to alive device, if
1109 * the caller wants to re-bind (instead of close) this socket in
1110 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
1112 hdev = hci_pi(sk)->hdev;
1113 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1114 hci_pi(sk)->hdev = NULL;
1115 sk->sk_state = BT_OPEN;
1120 if (sk->sk_state == BT_BOUND) {
1125 switch (haddr.hci_channel) {
1126 case HCI_CHANNEL_RAW:
1127 if (hci_pi(sk)->hdev) {
1132 if (haddr.hci_dev != HCI_DEV_NONE) {
1133 hdev = hci_dev_get(haddr.hci_dev);
1139 atomic_inc(&hdev->promisc);
1142 hci_pi(sk)->channel = haddr.hci_channel;
1144 if (!hci_sock_gen_cookie(sk)) {
1145 /* In the case when a cookie has already been assigned,
1146 * then there has been already an ioctl issued against
1147 * an unbound socket and with that triggered an open
1148 * notification. Send a close notification first to
1149 * allow the state transition to bounded.
1151 skb = create_monitor_ctrl_close(sk);
1153 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1154 HCI_SOCK_TRUSTED, NULL);
1159 if (capable(CAP_NET_ADMIN))
1160 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1162 hci_pi(sk)->hdev = hdev;
1164 /* Send event to monitor */
1165 skb = create_monitor_ctrl_open(sk);
1167 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1168 HCI_SOCK_TRUSTED, NULL);
1173 case HCI_CHANNEL_USER:
1174 if (hci_pi(sk)->hdev) {
1179 if (haddr.hci_dev == HCI_DEV_NONE) {
1184 if (!capable(CAP_NET_ADMIN)) {
1189 hdev = hci_dev_get(haddr.hci_dev);
1195 if (test_bit(HCI_INIT, &hdev->flags) ||
1196 hci_dev_test_flag(hdev, HCI_SETUP) ||
1197 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1198 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1199 test_bit(HCI_UP, &hdev->flags))) {
1205 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
1211 mgmt_index_removed(hdev);
1213 err = hci_dev_open(hdev->id);
1215 if (err == -EALREADY) {
1216 /* In case the transport is already up and
1217 * running, clear the error here.
1219 * This can happen when opening a user
1220 * channel and HCI_AUTO_OFF grace period
1225 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
1226 mgmt_index_added(hdev);
1232 hci_pi(sk)->channel = haddr.hci_channel;
1234 if (!hci_sock_gen_cookie(sk)) {
1235 /* In the case when a cookie has already been assigned,
1236 * this socket will transition from a raw socket into
1237 * a user channel socket. For a clean transition, send
1238 * the close notification first.
1240 skb = create_monitor_ctrl_close(sk);
1242 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1243 HCI_SOCK_TRUSTED, NULL);
1248 /* The user channel is restricted to CAP_NET_ADMIN
1249 * capabilities and with that implicitly trusted.
1251 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1253 hci_pi(sk)->hdev = hdev;
1255 /* Send event to monitor */
1256 skb = create_monitor_ctrl_open(sk);
1258 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1259 HCI_SOCK_TRUSTED, NULL);
1263 atomic_inc(&hdev->promisc);
1266 case HCI_CHANNEL_MONITOR:
1267 if (haddr.hci_dev != HCI_DEV_NONE) {
1272 if (!capable(CAP_NET_RAW)) {
1277 hci_pi(sk)->channel = haddr.hci_channel;
1279 /* The monitor interface is restricted to CAP_NET_RAW
1280 * capabilities and with that implicitly trusted.
1282 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1284 send_monitor_note(sk, "Linux version %s (%s)",
1285 init_utsname()->release,
1286 init_utsname()->machine);
1287 send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
1288 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
1289 send_monitor_replay(sk);
1290 send_monitor_control_replay(sk);
1292 atomic_inc(&monitor_promisc);
1295 case HCI_CHANNEL_LOGGING:
1296 if (haddr.hci_dev != HCI_DEV_NONE) {
1301 if (!capable(CAP_NET_ADMIN)) {
1306 hci_pi(sk)->channel = haddr.hci_channel;
1310 if (!hci_mgmt_chan_find(haddr.hci_channel)) {
1315 if (haddr.hci_dev != HCI_DEV_NONE) {
1320 /* Users with CAP_NET_ADMIN capabilities are allowed
1321 * access to all management commands and events. For
1322 * untrusted users the interface is restricted and
1323 * also only untrusted events are sent.
1325 if (capable(CAP_NET_ADMIN))
1326 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1328 hci_pi(sk)->channel = haddr.hci_channel;
1330 /* At the moment the index and unconfigured index events
1331 * are enabled unconditionally. Setting them on each
1332 * socket when binding keeps this functionality. They
1333 * however might be cleared later and then sending of these
1334 * events will be disabled, but that is then intentional.
1336 * This also enables generic events that are safe to be
1337 * received by untrusted users. Example for such events
1338 * are changes to settings, class of device, name etc.
1340 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
1341 if (!hci_sock_gen_cookie(sk)) {
1342 /* In the case when a cookie has already been
1343 * assigned, this socket will transition from
1344 * a raw socket into a control socket. To
1345 * allow for a clean transition, send the
1346 * close notification first.
1348 skb = create_monitor_ctrl_close(sk);
1350 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1351 HCI_SOCK_TRUSTED, NULL);
1356 /* Send event to monitor */
1357 skb = create_monitor_ctrl_open(sk);
1359 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1360 HCI_SOCK_TRUSTED, NULL);
1364 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
1365 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
1366 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
1367 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
1368 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
1369 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
1374 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */
1375 if (!hci_pi(sk)->mtu)
1376 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE;
1378 sk->sk_state = BT_BOUND;
1385 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
1388 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
1389 struct sock *sk = sock->sk;
1390 struct hci_dev *hdev;
1393 BT_DBG("sock %p sk %p", sock, sk);
1400 hdev = hci_hdev_from_sock(sk);
1402 err = PTR_ERR(hdev);
1406 haddr->hci_family = AF_BLUETOOTH;
1407 haddr->hci_dev = hdev->id;
1408 haddr->hci_channel= hci_pi(sk)->channel;
1409 err = sizeof(*haddr);
1416 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
1417 struct sk_buff *skb)
1419 __u8 mask = hci_pi(sk)->cmsg_mask;
1421 if (mask & HCI_CMSG_DIR) {
1422 int incoming = bt_cb(skb)->incoming;
1423 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
1427 if (mask & HCI_CMSG_TSTAMP) {
1428 #ifdef CONFIG_COMPAT
1429 struct old_timeval32 ctv;
1431 struct __kernel_old_timeval tv;
1435 skb_get_timestamp(skb, &tv);
1439 #ifdef CONFIG_COMPAT
1440 if (!COMPAT_USE_64BIT_TIME &&
1441 (msg->msg_flags & MSG_CMSG_COMPAT)) {
1442 ctv.tv_sec = tv.tv_sec;
1443 ctv.tv_usec = tv.tv_usec;
1449 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
1453 static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1454 size_t len, int flags)
1456 struct sock *sk = sock->sk;
1457 struct sk_buff *skb;
1459 unsigned int skblen;
1461 BT_DBG("sock %p, sk %p", sock, sk);
1463 if (flags & MSG_OOB)
1466 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
1469 if (sk->sk_state == BT_CLOSED)
1472 skb = skb_recv_datagram(sk, flags, &err);
1479 msg->msg_flags |= MSG_TRUNC;
1483 skb_reset_transport_header(skb);
1484 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1486 switch (hci_pi(sk)->channel) {
1487 case HCI_CHANNEL_RAW:
1488 hci_sock_cmsg(sk, msg, skb);
1490 case HCI_CHANNEL_USER:
1491 case HCI_CHANNEL_MONITOR:
1492 sock_recv_timestamp(msg, sk, skb);
1495 if (hci_mgmt_chan_find(hci_pi(sk)->channel))
1496 sock_recv_timestamp(msg, sk, skb);
1500 skb_free_datagram(sk, skb);
1502 if (flags & MSG_TRUNC)
1505 return err ? : copied;
1508 static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
1509 struct sk_buff *skb)
1512 struct mgmt_hdr *hdr;
1513 u16 opcode, index, len;
1514 struct hci_dev *hdev = NULL;
1515 const struct hci_mgmt_handler *handler;
1516 bool var_len, no_hdev;
1519 BT_DBG("got %d bytes", skb->len);
1521 if (skb->len < sizeof(*hdr))
1524 hdr = (void *)skb->data;
1525 opcode = __le16_to_cpu(hdr->opcode);
1526 index = __le16_to_cpu(hdr->index);
1527 len = __le16_to_cpu(hdr->len);
1529 if (len != skb->len - sizeof(*hdr)) {
1534 if (chan->channel == HCI_CHANNEL_CONTROL) {
1535 struct sk_buff *cmd;
1537 /* Send event to monitor */
1538 cmd = create_monitor_ctrl_command(sk, index, opcode, len,
1539 skb->data + sizeof(*hdr));
1541 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd,
1542 HCI_SOCK_TRUSTED, NULL);
1547 if (opcode >= chan->handler_count ||
1548 chan->handlers[opcode].func == NULL) {
1549 BT_DBG("Unknown op %u", opcode);
1550 err = mgmt_cmd_status(sk, index, opcode,
1551 MGMT_STATUS_UNKNOWN_COMMAND);
1555 handler = &chan->handlers[opcode];
1557 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
1558 !(handler->flags & HCI_MGMT_UNTRUSTED)) {
1559 err = mgmt_cmd_status(sk, index, opcode,
1560 MGMT_STATUS_PERMISSION_DENIED);
1564 if (index != MGMT_INDEX_NONE) {
1565 hdev = hci_dev_get(index);
1567 err = mgmt_cmd_status(sk, index, opcode,
1568 MGMT_STATUS_INVALID_INDEX);
1572 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1573 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1574 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1575 err = mgmt_cmd_status(sk, index, opcode,
1576 MGMT_STATUS_INVALID_INDEX);
1580 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1581 !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
1582 err = mgmt_cmd_status(sk, index, opcode,
1583 MGMT_STATUS_INVALID_INDEX);
1588 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
1589 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
1590 if (no_hdev != !hdev) {
1591 err = mgmt_cmd_status(sk, index, opcode,
1592 MGMT_STATUS_INVALID_INDEX);
1597 var_len = (handler->flags & HCI_MGMT_VAR_LEN);
1598 if ((var_len && len < handler->data_len) ||
1599 (!var_len && len != handler->data_len)) {
1600 err = mgmt_cmd_status(sk, index, opcode,
1601 MGMT_STATUS_INVALID_PARAMS);
1605 if (hdev && chan->hdev_init)
1606 chan->hdev_init(sk, hdev);
1608 cp = skb->data + sizeof(*hdr);
1610 err = handler->func(sk, hdev, cp, len);
1623 static int hci_logging_frame(struct sock *sk, struct sk_buff *skb,
1626 struct hci_mon_hdr *hdr;
1627 struct hci_dev *hdev;
1631 /* The logging frame consists at minimum of the standard header,
1632 * the priority byte, the ident length byte and at least one string
1633 * terminator NUL byte. Anything shorter are invalid packets.
1635 if (skb->len < sizeof(*hdr) + 3)
1638 hdr = (void *)skb->data;
1640 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr))
1643 if (__le16_to_cpu(hdr->opcode) == 0x0000) {
1644 __u8 priority = skb->data[sizeof(*hdr)];
1645 __u8 ident_len = skb->data[sizeof(*hdr) + 1];
1647 /* Only the priorities 0-7 are valid and with that any other
1648 * value results in an invalid packet.
1650 * The priority byte is followed by an ident length byte and
1651 * the NUL terminated ident string. Check that the ident
1652 * length is not overflowing the packet and also that the
1653 * ident string itself is NUL terminated. In case the ident
1654 * length is zero, the length value actually doubles as NUL
1655 * terminator identifier.
1657 * The message follows the ident string (if present) and
1658 * must be NUL terminated. Otherwise it is not a valid packet.
1660 if (priority > 7 || skb->data[skb->len - 1] != 0x00 ||
1661 ident_len > skb->len - sizeof(*hdr) - 3 ||
1662 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00)
1668 index = __le16_to_cpu(hdr->index);
1670 if (index != MGMT_INDEX_NONE) {
1671 hdev = hci_dev_get(index);
1678 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
1680 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
1689 static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1692 struct sock *sk = sock->sk;
1693 struct hci_mgmt_chan *chan;
1694 struct hci_dev *hdev;
1695 struct sk_buff *skb;
1697 const unsigned int flags = msg->msg_flags;
1699 BT_DBG("sock %p sk %p", sock, sk);
1701 if (flags & MSG_OOB)
1704 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT))
1707 if (len < 4 || len > hci_pi(sk)->mtu)
1710 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
1712 return PTR_ERR(skb);
1716 switch (hci_pi(sk)->channel) {
1717 case HCI_CHANNEL_RAW:
1718 case HCI_CHANNEL_USER:
1720 case HCI_CHANNEL_MONITOR:
1723 case HCI_CHANNEL_LOGGING:
1724 err = hci_logging_frame(sk, skb, flags);
1727 mutex_lock(&mgmt_chan_list_lock);
1728 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
1730 err = hci_mgmt_cmd(chan, sk, skb);
1734 mutex_unlock(&mgmt_chan_list_lock);
1738 hdev = hci_hdev_from_sock(sk);
1740 err = PTR_ERR(hdev);
1744 if (!test_bit(HCI_UP, &hdev->flags)) {
1749 hci_skb_pkt_type(skb) = skb->data[0];
1752 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
1753 /* No permission check is needed for user channel
1754 * since that gets enforced when binding the socket.
1756 * However check that the packet type is valid.
1758 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
1759 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1760 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1761 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1766 skb_queue_tail(&hdev->raw_q, skb);
1767 queue_work(hdev->workqueue, &hdev->tx_work);
1768 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
1769 u16 opcode = get_unaligned_le16(skb->data);
1770 u16 ogf = hci_opcode_ogf(opcode);
1771 u16 ocf = hci_opcode_ocf(opcode);
1773 if (((ogf > HCI_SFLT_MAX_OGF) ||
1774 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
1775 &hci_sec_filter.ocf_mask[ogf])) &&
1776 !capable(CAP_NET_RAW)) {
1781 /* Since the opcode has already been extracted here, store
1782 * a copy of the value for later use by the drivers.
1784 hci_skb_opcode(skb) = opcode;
1787 skb_queue_tail(&hdev->raw_q, skb);
1788 queue_work(hdev->workqueue, &hdev->tx_work);
1790 /* Stand-alone HCI commands must be flagged as
1791 * single-command requests.
1793 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
1795 skb_queue_tail(&hdev->cmd_q, skb);
1796 queue_work(hdev->workqueue, &hdev->cmd_work);
1799 if (!capable(CAP_NET_RAW)) {
1804 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1805 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1806 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1811 skb_queue_tail(&hdev->raw_q, skb);
1812 queue_work(hdev->workqueue, &hdev->tx_work);
1826 static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
1827 sockptr_t optval, unsigned int len)
1829 struct hci_ufilter uf = { .opcode = 0 };
1830 struct sock *sk = sock->sk;
1831 int err = 0, opt = 0;
1833 BT_DBG("sk %p, opt %d", sk, optname);
1837 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1844 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1850 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1852 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1855 case HCI_TIME_STAMP:
1856 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1862 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1864 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1869 struct hci_filter *f = &hci_pi(sk)->filter;
1871 uf.type_mask = f->type_mask;
1872 uf.opcode = f->opcode;
1873 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1874 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1877 len = min_t(unsigned int, len, sizeof(uf));
1878 if (copy_from_sockptr(&uf, optval, len)) {
1883 if (!capable(CAP_NET_RAW)) {
1884 uf.type_mask &= hci_sec_filter.type_mask;
1885 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1886 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1890 struct hci_filter *f = &hci_pi(sk)->filter;
1892 f->type_mask = uf.type_mask;
1893 f->opcode = uf.opcode;
1894 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1895 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1909 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
1910 sockptr_t optval, unsigned int len)
1912 struct sock *sk = sock->sk;
1916 BT_DBG("sk %p, opt %d", sk, optname);
1918 if (level == SOL_HCI)
1919 return hci_sock_setsockopt_old(sock, level, optname, optval,
1922 if (level != SOL_BLUETOOTH)
1923 return -ENOPROTOOPT;
1930 switch (hci_pi(sk)->channel) {
1931 /* Don't allow changing MTU for channels that are meant for HCI
1934 case HCI_CHANNEL_RAW:
1935 case HCI_CHANNEL_USER:
1940 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1945 hci_pi(sk)->mtu = opt;
1958 static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname,
1959 char __user *optval, int __user *optlen)
1961 struct hci_ufilter uf;
1962 struct sock *sk = sock->sk;
1963 int len, opt, err = 0;
1965 BT_DBG("sk %p, opt %d", sk, optname);
1967 if (get_user(len, optlen))
1972 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1979 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
1984 if (put_user(opt, optval))
1988 case HCI_TIME_STAMP:
1989 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
1994 if (put_user(opt, optval))
2000 struct hci_filter *f = &hci_pi(sk)->filter;
2002 memset(&uf, 0, sizeof(uf));
2003 uf.type_mask = f->type_mask;
2004 uf.opcode = f->opcode;
2005 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
2006 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
2009 len = min_t(unsigned int, len, sizeof(uf));
2010 if (copy_to_user(optval, &uf, len))
2024 static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
2025 char __user *optval, int __user *optlen)
2027 struct sock *sk = sock->sk;
2030 BT_DBG("sk %p, opt %d", sk, optname);
2032 if (level == SOL_HCI)
2033 return hci_sock_getsockopt_old(sock, level, optname, optval,
2036 if (level != SOL_BLUETOOTH)
2037 return -ENOPROTOOPT;
2044 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval))
2057 static void hci_sock_destruct(struct sock *sk)
2059 skb_queue_purge(&sk->sk_receive_queue);
2060 skb_queue_purge(&sk->sk_write_queue);
2063 static const struct proto_ops hci_sock_ops = {
2064 .family = PF_BLUETOOTH,
2065 .owner = THIS_MODULE,
2066 .release = hci_sock_release,
2067 .bind = hci_sock_bind,
2068 .getname = hci_sock_getname,
2069 .sendmsg = hci_sock_sendmsg,
2070 .recvmsg = hci_sock_recvmsg,
2071 .ioctl = hci_sock_ioctl,
2072 #ifdef CONFIG_COMPAT
2073 .compat_ioctl = hci_sock_compat_ioctl,
2075 .poll = datagram_poll,
2076 .listen = sock_no_listen,
2077 .shutdown = sock_no_shutdown,
2078 .setsockopt = hci_sock_setsockopt,
2079 .getsockopt = hci_sock_getsockopt,
2080 .connect = sock_no_connect,
2081 .socketpair = sock_no_socketpair,
2082 .accept = sock_no_accept,
2083 .mmap = sock_no_mmap
2086 static struct proto hci_sk_proto = {
2088 .owner = THIS_MODULE,
2089 .obj_size = sizeof(struct hci_pinfo)
2092 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
2097 BT_DBG("sock %p", sock);
2099 if (sock->type != SOCK_RAW)
2100 return -ESOCKTNOSUPPORT;
2102 sock->ops = &hci_sock_ops;
2104 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
2108 sock_init_data(sock, sk);
2110 sock_reset_flag(sk, SOCK_ZAPPED);
2112 sk->sk_protocol = protocol;
2114 sock->state = SS_UNCONNECTED;
2115 sk->sk_state = BT_OPEN;
2116 sk->sk_destruct = hci_sock_destruct;
2118 bt_sock_link(&hci_sk_list, sk);
2122 static const struct net_proto_family hci_sock_family_ops = {
2123 .family = PF_BLUETOOTH,
2124 .owner = THIS_MODULE,
2125 .create = hci_sock_create,
2128 int __init hci_sock_init(void)
2132 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
2134 err = proto_register(&hci_sk_proto, 0);
2138 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
2140 BT_ERR("HCI socket registration failed");
2144 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
2146 BT_ERR("Failed to create HCI proc file");
2147 bt_sock_unregister(BTPROTO_HCI);
2151 BT_INFO("HCI socket layer initialized");
2156 proto_unregister(&hci_sk_proto);
2160 void hci_sock_cleanup(void)
2162 bt_procfs_cleanup(&init_net, "hci");
2163 bt_sock_unregister(BTPROTO_HCI);
2164 proto_unregister(&hci_sk_proto);