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 mgmt_index_added(hdev);
893 atomic_dec(&hdev->promisc);
903 static int hci_sock_reject_list_add(struct hci_dev *hdev, void __user *arg)
908 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
913 err = hci_bdaddr_list_add(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
915 hci_dev_unlock(hdev);
920 static int hci_sock_reject_list_del(struct hci_dev *hdev, void __user *arg)
925 if (copy_from_user(&bdaddr, arg, sizeof(bdaddr)))
930 err = hci_bdaddr_list_del(&hdev->reject_list, &bdaddr, BDADDR_BREDR);
932 hci_dev_unlock(hdev);
937 /* Ioctls that require bound socket */
938 static int hci_sock_bound_ioctl(struct sock *sk, unsigned int cmd,
941 struct hci_dev *hdev = hci_hdev_from_sock(sk);
944 return PTR_ERR(hdev);
946 if (hci_dev_test_flag(hdev, HCI_USER_CHANNEL))
949 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED))
952 if (hdev->dev_type != HCI_PRIMARY)
957 if (!capable(CAP_NET_ADMIN))
962 return hci_get_conn_info(hdev, (void __user *)arg);
965 return hci_get_auth_info(hdev, (void __user *)arg);
968 if (!capable(CAP_NET_ADMIN))
970 return hci_sock_reject_list_add(hdev, (void __user *)arg);
973 if (!capable(CAP_NET_ADMIN))
975 return hci_sock_reject_list_del(hdev, (void __user *)arg);
981 static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
984 void __user *argp = (void __user *)arg;
985 struct sock *sk = sock->sk;
988 BT_DBG("cmd %x arg %lx", cmd, arg);
992 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
997 /* When calling an ioctl on an unbound raw socket, then ensure
998 * that the monitor gets informed. Ensure that the resulting event
999 * is only send once by checking if the cookie exists or not. The
1000 * socket cookie will be only ever generated once for the lifetime
1001 * of a given socket.
1003 if (hci_sock_gen_cookie(sk)) {
1004 struct sk_buff *skb;
1006 if (capable(CAP_NET_ADMIN))
1007 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1009 /* Send event to monitor */
1010 skb = create_monitor_ctrl_open(sk);
1012 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1013 HCI_SOCK_TRUSTED, NULL);
1022 return hci_get_dev_list(argp);
1025 return hci_get_dev_info(argp);
1027 case HCIGETCONNLIST:
1028 return hci_get_conn_list(argp);
1031 if (!capable(CAP_NET_ADMIN))
1033 return hci_dev_open(arg);
1036 if (!capable(CAP_NET_ADMIN))
1038 return hci_dev_close(arg);
1041 if (!capable(CAP_NET_ADMIN))
1043 return hci_dev_reset(arg);
1046 if (!capable(CAP_NET_ADMIN))
1048 return hci_dev_reset_stat(arg);
1055 case HCISETLINKMODE:
1058 if (!capable(CAP_NET_ADMIN))
1060 return hci_dev_cmd(cmd, argp);
1063 return hci_inquiry(argp);
1068 err = hci_sock_bound_ioctl(sk, cmd, arg);
1075 #ifdef CONFIG_COMPAT
1076 static int hci_sock_compat_ioctl(struct socket *sock, unsigned int cmd,
1084 return hci_sock_ioctl(sock, cmd, arg);
1087 return hci_sock_ioctl(sock, cmd, (unsigned long)compat_ptr(arg));
1091 static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
1094 struct sockaddr_hci haddr;
1095 struct sock *sk = sock->sk;
1096 struct hci_dev *hdev = NULL;
1097 struct sk_buff *skb;
1100 BT_DBG("sock %p sk %p", sock, sk);
1105 memset(&haddr, 0, sizeof(haddr));
1106 len = min_t(unsigned int, sizeof(haddr), addr_len);
1107 memcpy(&haddr, addr, len);
1109 if (haddr.hci_family != AF_BLUETOOTH)
1114 /* Allow detaching from dead device and attaching to alive device, if
1115 * the caller wants to re-bind (instead of close) this socket in
1116 * response to hci_sock_dev_event(HCI_DEV_UNREG) notification.
1118 hdev = hci_pi(sk)->hdev;
1119 if (hdev && hci_dev_test_flag(hdev, HCI_UNREGISTER)) {
1120 hci_pi(sk)->hdev = NULL;
1121 sk->sk_state = BT_OPEN;
1126 if (sk->sk_state == BT_BOUND) {
1131 switch (haddr.hci_channel) {
1132 case HCI_CHANNEL_RAW:
1133 if (hci_pi(sk)->hdev) {
1138 if (haddr.hci_dev != HCI_DEV_NONE) {
1139 hdev = hci_dev_get(haddr.hci_dev);
1145 atomic_inc(&hdev->promisc);
1148 hci_pi(sk)->channel = haddr.hci_channel;
1150 if (!hci_sock_gen_cookie(sk)) {
1151 /* In the case when a cookie has already been assigned,
1152 * then there has been already an ioctl issued against
1153 * an unbound socket and with that triggered an open
1154 * notification. Send a close notification first to
1155 * allow the state transition to bounded.
1157 skb = create_monitor_ctrl_close(sk);
1159 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1160 HCI_SOCK_TRUSTED, NULL);
1165 if (capable(CAP_NET_ADMIN))
1166 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1168 hci_pi(sk)->hdev = hdev;
1170 /* Send event to monitor */
1171 skb = create_monitor_ctrl_open(sk);
1173 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1174 HCI_SOCK_TRUSTED, NULL);
1179 case HCI_CHANNEL_USER:
1180 if (hci_pi(sk)->hdev) {
1185 if (haddr.hci_dev == HCI_DEV_NONE) {
1190 if (!capable(CAP_NET_ADMIN)) {
1195 hdev = hci_dev_get(haddr.hci_dev);
1201 if (test_bit(HCI_INIT, &hdev->flags) ||
1202 hci_dev_test_flag(hdev, HCI_SETUP) ||
1203 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1204 (!hci_dev_test_flag(hdev, HCI_AUTO_OFF) &&
1205 test_bit(HCI_UP, &hdev->flags))) {
1211 if (hci_dev_test_and_set_flag(hdev, HCI_USER_CHANNEL)) {
1217 mgmt_index_removed(hdev);
1219 err = hci_dev_open(hdev->id);
1221 if (err == -EALREADY) {
1222 /* In case the transport is already up and
1223 * running, clear the error here.
1225 * This can happen when opening a user
1226 * channel and HCI_AUTO_OFF grace period
1231 hci_dev_clear_flag(hdev, HCI_USER_CHANNEL);
1232 mgmt_index_added(hdev);
1238 hci_pi(sk)->channel = haddr.hci_channel;
1240 if (!hci_sock_gen_cookie(sk)) {
1241 /* In the case when a cookie has already been assigned,
1242 * this socket will transition from a raw socket into
1243 * a user channel socket. For a clean transition, send
1244 * the close notification first.
1246 skb = create_monitor_ctrl_close(sk);
1248 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1249 HCI_SOCK_TRUSTED, NULL);
1254 /* The user channel is restricted to CAP_NET_ADMIN
1255 * capabilities and with that implicitly trusted.
1257 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1259 hci_pi(sk)->hdev = hdev;
1261 /* Send event to monitor */
1262 skb = create_monitor_ctrl_open(sk);
1264 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1265 HCI_SOCK_TRUSTED, NULL);
1269 atomic_inc(&hdev->promisc);
1272 case HCI_CHANNEL_MONITOR:
1273 if (haddr.hci_dev != HCI_DEV_NONE) {
1278 if (!capable(CAP_NET_RAW)) {
1283 hci_pi(sk)->channel = haddr.hci_channel;
1285 /* The monitor interface is restricted to CAP_NET_RAW
1286 * capabilities and with that implicitly trusted.
1288 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1290 send_monitor_note(sk, "Linux version %s (%s)",
1291 init_utsname()->release,
1292 init_utsname()->machine);
1293 send_monitor_note(sk, "Bluetooth subsystem version %u.%u",
1294 BT_SUBSYS_VERSION, BT_SUBSYS_REVISION);
1295 send_monitor_replay(sk);
1296 send_monitor_control_replay(sk);
1298 atomic_inc(&monitor_promisc);
1301 case HCI_CHANNEL_LOGGING:
1302 if (haddr.hci_dev != HCI_DEV_NONE) {
1307 if (!capable(CAP_NET_ADMIN)) {
1312 hci_pi(sk)->channel = haddr.hci_channel;
1316 if (!hci_mgmt_chan_find(haddr.hci_channel)) {
1321 if (haddr.hci_dev != HCI_DEV_NONE) {
1326 /* Users with CAP_NET_ADMIN capabilities are allowed
1327 * access to all management commands and events. For
1328 * untrusted users the interface is restricted and
1329 * also only untrusted events are sent.
1331 if (capable(CAP_NET_ADMIN))
1332 hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
1334 hci_pi(sk)->channel = haddr.hci_channel;
1336 /* At the moment the index and unconfigured index events
1337 * are enabled unconditionally. Setting them on each
1338 * socket when binding keeps this functionality. They
1339 * however might be cleared later and then sending of these
1340 * events will be disabled, but that is then intentional.
1342 * This also enables generic events that are safe to be
1343 * received by untrusted users. Example for such events
1344 * are changes to settings, class of device, name etc.
1346 if (hci_pi(sk)->channel == HCI_CHANNEL_CONTROL) {
1347 if (!hci_sock_gen_cookie(sk)) {
1348 /* In the case when a cookie has already been
1349 * assigned, this socket will transition from
1350 * a raw socket into a control socket. To
1351 * allow for a clean transition, send the
1352 * close notification first.
1354 skb = create_monitor_ctrl_close(sk);
1356 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1357 HCI_SOCK_TRUSTED, NULL);
1362 /* Send event to monitor */
1363 skb = create_monitor_ctrl_open(sk);
1365 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb,
1366 HCI_SOCK_TRUSTED, NULL);
1370 hci_sock_set_flag(sk, HCI_MGMT_INDEX_EVENTS);
1371 hci_sock_set_flag(sk, HCI_MGMT_UNCONF_INDEX_EVENTS);
1372 hci_sock_set_flag(sk, HCI_MGMT_OPTION_EVENTS);
1373 hci_sock_set_flag(sk, HCI_MGMT_SETTING_EVENTS);
1374 hci_sock_set_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
1375 hci_sock_set_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
1380 /* Default MTU to HCI_MAX_FRAME_SIZE if not set */
1381 if (!hci_pi(sk)->mtu)
1382 hci_pi(sk)->mtu = HCI_MAX_FRAME_SIZE;
1384 sk->sk_state = BT_BOUND;
1391 static int hci_sock_getname(struct socket *sock, struct sockaddr *addr,
1394 struct sockaddr_hci *haddr = (struct sockaddr_hci *)addr;
1395 struct sock *sk = sock->sk;
1396 struct hci_dev *hdev;
1399 BT_DBG("sock %p sk %p", sock, sk);
1406 hdev = hci_hdev_from_sock(sk);
1408 err = PTR_ERR(hdev);
1412 haddr->hci_family = AF_BLUETOOTH;
1413 haddr->hci_dev = hdev->id;
1414 haddr->hci_channel= hci_pi(sk)->channel;
1415 err = sizeof(*haddr);
1422 static void hci_sock_cmsg(struct sock *sk, struct msghdr *msg,
1423 struct sk_buff *skb)
1425 __u8 mask = hci_pi(sk)->cmsg_mask;
1427 if (mask & HCI_CMSG_DIR) {
1428 int incoming = bt_cb(skb)->incoming;
1429 put_cmsg(msg, SOL_HCI, HCI_CMSG_DIR, sizeof(incoming),
1433 if (mask & HCI_CMSG_TSTAMP) {
1434 #ifdef CONFIG_COMPAT
1435 struct old_timeval32 ctv;
1437 struct __kernel_old_timeval tv;
1441 skb_get_timestamp(skb, &tv);
1445 #ifdef CONFIG_COMPAT
1446 if (!COMPAT_USE_64BIT_TIME &&
1447 (msg->msg_flags & MSG_CMSG_COMPAT)) {
1448 ctv.tv_sec = tv.tv_sec;
1449 ctv.tv_usec = tv.tv_usec;
1455 put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
1459 static int hci_sock_recvmsg(struct socket *sock, struct msghdr *msg,
1460 size_t len, int flags)
1462 struct sock *sk = sock->sk;
1463 struct sk_buff *skb;
1465 unsigned int skblen;
1467 BT_DBG("sock %p, sk %p", sock, sk);
1469 if (flags & MSG_OOB)
1472 if (hci_pi(sk)->channel == HCI_CHANNEL_LOGGING)
1475 if (sk->sk_state == BT_CLOSED)
1478 skb = skb_recv_datagram(sk, flags, &err);
1485 msg->msg_flags |= MSG_TRUNC;
1489 skb_reset_transport_header(skb);
1490 err = skb_copy_datagram_msg(skb, 0, msg, copied);
1492 switch (hci_pi(sk)->channel) {
1493 case HCI_CHANNEL_RAW:
1494 hci_sock_cmsg(sk, msg, skb);
1496 case HCI_CHANNEL_USER:
1497 case HCI_CHANNEL_MONITOR:
1498 sock_recv_timestamp(msg, sk, skb);
1501 if (hci_mgmt_chan_find(hci_pi(sk)->channel))
1502 sock_recv_timestamp(msg, sk, skb);
1506 skb_free_datagram(sk, skb);
1508 if (flags & MSG_TRUNC)
1511 return err ? : copied;
1514 static int hci_mgmt_cmd(struct hci_mgmt_chan *chan, struct sock *sk,
1515 struct sk_buff *skb)
1518 struct mgmt_hdr *hdr;
1519 u16 opcode, index, len;
1520 struct hci_dev *hdev = NULL;
1521 const struct hci_mgmt_handler *handler;
1522 bool var_len, no_hdev;
1525 BT_DBG("got %d bytes", skb->len);
1527 if (skb->len < sizeof(*hdr))
1530 hdr = (void *)skb->data;
1531 opcode = __le16_to_cpu(hdr->opcode);
1532 index = __le16_to_cpu(hdr->index);
1533 len = __le16_to_cpu(hdr->len);
1535 if (len != skb->len - sizeof(*hdr)) {
1540 if (chan->channel == HCI_CHANNEL_CONTROL) {
1541 struct sk_buff *cmd;
1543 /* Send event to monitor */
1544 cmd = create_monitor_ctrl_command(sk, index, opcode, len,
1545 skb->data + sizeof(*hdr));
1547 hci_send_to_channel(HCI_CHANNEL_MONITOR, cmd,
1548 HCI_SOCK_TRUSTED, NULL);
1553 if (opcode >= chan->handler_count ||
1554 chan->handlers[opcode].func == NULL) {
1555 BT_DBG("Unknown op %u", opcode);
1556 err = mgmt_cmd_status(sk, index, opcode,
1557 MGMT_STATUS_UNKNOWN_COMMAND);
1561 handler = &chan->handlers[opcode];
1563 if (!hci_sock_test_flag(sk, HCI_SOCK_TRUSTED) &&
1564 !(handler->flags & HCI_MGMT_UNTRUSTED)) {
1565 err = mgmt_cmd_status(sk, index, opcode,
1566 MGMT_STATUS_PERMISSION_DENIED);
1570 if (index != MGMT_INDEX_NONE) {
1571 hdev = hci_dev_get(index);
1573 err = mgmt_cmd_status(sk, index, opcode,
1574 MGMT_STATUS_INVALID_INDEX);
1578 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
1579 hci_dev_test_flag(hdev, HCI_CONFIG) ||
1580 hci_dev_test_flag(hdev, HCI_USER_CHANNEL)) {
1581 err = mgmt_cmd_status(sk, index, opcode,
1582 MGMT_STATUS_INVALID_INDEX);
1586 if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED) &&
1587 !(handler->flags & HCI_MGMT_UNCONFIGURED)) {
1588 err = mgmt_cmd_status(sk, index, opcode,
1589 MGMT_STATUS_INVALID_INDEX);
1594 if (!(handler->flags & HCI_MGMT_HDEV_OPTIONAL)) {
1595 no_hdev = (handler->flags & HCI_MGMT_NO_HDEV);
1596 if (no_hdev != !hdev) {
1597 err = mgmt_cmd_status(sk, index, opcode,
1598 MGMT_STATUS_INVALID_INDEX);
1603 var_len = (handler->flags & HCI_MGMT_VAR_LEN);
1604 if ((var_len && len < handler->data_len) ||
1605 (!var_len && len != handler->data_len)) {
1606 err = mgmt_cmd_status(sk, index, opcode,
1607 MGMT_STATUS_INVALID_PARAMS);
1611 if (hdev && chan->hdev_init)
1612 chan->hdev_init(sk, hdev);
1614 cp = skb->data + sizeof(*hdr);
1616 err = handler->func(sk, hdev, cp, len);
1629 static int hci_logging_frame(struct sock *sk, struct sk_buff *skb,
1632 struct hci_mon_hdr *hdr;
1633 struct hci_dev *hdev;
1637 /* The logging frame consists at minimum of the standard header,
1638 * the priority byte, the ident length byte and at least one string
1639 * terminator NUL byte. Anything shorter are invalid packets.
1641 if (skb->len < sizeof(*hdr) + 3)
1644 hdr = (void *)skb->data;
1646 if (__le16_to_cpu(hdr->len) != skb->len - sizeof(*hdr))
1649 if (__le16_to_cpu(hdr->opcode) == 0x0000) {
1650 __u8 priority = skb->data[sizeof(*hdr)];
1651 __u8 ident_len = skb->data[sizeof(*hdr) + 1];
1653 /* Only the priorities 0-7 are valid and with that any other
1654 * value results in an invalid packet.
1656 * The priority byte is followed by an ident length byte and
1657 * the NUL terminated ident string. Check that the ident
1658 * length is not overflowing the packet and also that the
1659 * ident string itself is NUL terminated. In case the ident
1660 * length is zero, the length value actually doubles as NUL
1661 * terminator identifier.
1663 * The message follows the ident string (if present) and
1664 * must be NUL terminated. Otherwise it is not a valid packet.
1666 if (priority > 7 || skb->data[skb->len - 1] != 0x00 ||
1667 ident_len > skb->len - sizeof(*hdr) - 3 ||
1668 skb->data[sizeof(*hdr) + ident_len + 1] != 0x00)
1674 index = __le16_to_cpu(hdr->index);
1676 if (index != MGMT_INDEX_NONE) {
1677 hdev = hci_dev_get(index);
1684 hdr->opcode = cpu_to_le16(HCI_MON_USER_LOGGING);
1686 hci_send_to_channel(HCI_CHANNEL_MONITOR, skb, HCI_SOCK_TRUSTED, NULL);
1695 static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
1698 struct sock *sk = sock->sk;
1699 struct hci_mgmt_chan *chan;
1700 struct hci_dev *hdev;
1701 struct sk_buff *skb;
1703 const unsigned int flags = msg->msg_flags;
1705 BT_DBG("sock %p sk %p", sock, sk);
1707 if (flags & MSG_OOB)
1710 if (flags & ~(MSG_DONTWAIT | MSG_NOSIGNAL | MSG_ERRQUEUE | MSG_CMSG_COMPAT))
1713 if (len < 4 || len > hci_pi(sk)->mtu)
1716 skb = bt_skb_sendmsg(sk, msg, len, len, 0, 0);
1718 return PTR_ERR(skb);
1722 switch (hci_pi(sk)->channel) {
1723 case HCI_CHANNEL_RAW:
1724 case HCI_CHANNEL_USER:
1726 case HCI_CHANNEL_MONITOR:
1729 case HCI_CHANNEL_LOGGING:
1730 err = hci_logging_frame(sk, skb, flags);
1733 mutex_lock(&mgmt_chan_list_lock);
1734 chan = __hci_mgmt_chan_find(hci_pi(sk)->channel);
1736 err = hci_mgmt_cmd(chan, sk, skb);
1740 mutex_unlock(&mgmt_chan_list_lock);
1744 hdev = hci_hdev_from_sock(sk);
1746 err = PTR_ERR(hdev);
1750 if (!test_bit(HCI_UP, &hdev->flags)) {
1755 hci_skb_pkt_type(skb) = skb->data[0];
1758 if (hci_pi(sk)->channel == HCI_CHANNEL_USER) {
1759 /* No permission check is needed for user channel
1760 * since that gets enforced when binding the socket.
1762 * However check that the packet type is valid.
1764 if (hci_skb_pkt_type(skb) != HCI_COMMAND_PKT &&
1765 hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1766 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1767 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1772 skb_queue_tail(&hdev->raw_q, skb);
1773 queue_work(hdev->workqueue, &hdev->tx_work);
1774 } else if (hci_skb_pkt_type(skb) == HCI_COMMAND_PKT) {
1775 u16 opcode = get_unaligned_le16(skb->data);
1776 u16 ogf = hci_opcode_ogf(opcode);
1777 u16 ocf = hci_opcode_ocf(opcode);
1779 if (((ogf > HCI_SFLT_MAX_OGF) ||
1780 !hci_test_bit(ocf & HCI_FLT_OCF_BITS,
1781 &hci_sec_filter.ocf_mask[ogf])) &&
1782 !capable(CAP_NET_RAW)) {
1787 /* Since the opcode has already been extracted here, store
1788 * a copy of the value for later use by the drivers.
1790 hci_skb_opcode(skb) = opcode;
1793 skb_queue_tail(&hdev->raw_q, skb);
1794 queue_work(hdev->workqueue, &hdev->tx_work);
1796 /* Stand-alone HCI commands must be flagged as
1797 * single-command requests.
1799 bt_cb(skb)->hci.req_flags |= HCI_REQ_START;
1801 skb_queue_tail(&hdev->cmd_q, skb);
1802 queue_work(hdev->workqueue, &hdev->cmd_work);
1805 if (!capable(CAP_NET_RAW)) {
1810 if (hci_skb_pkt_type(skb) != HCI_ACLDATA_PKT &&
1811 hci_skb_pkt_type(skb) != HCI_SCODATA_PKT &&
1812 hci_skb_pkt_type(skb) != HCI_ISODATA_PKT) {
1817 skb_queue_tail(&hdev->raw_q, skb);
1818 queue_work(hdev->workqueue, &hdev->tx_work);
1832 static int hci_sock_setsockopt_old(struct socket *sock, int level, int optname,
1833 sockptr_t optval, unsigned int len)
1835 struct hci_ufilter uf = { .opcode = 0 };
1836 struct sock *sk = sock->sk;
1837 int err = 0, opt = 0;
1839 BT_DBG("sk %p, opt %d", sk, optname);
1843 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1850 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1856 hci_pi(sk)->cmsg_mask |= HCI_CMSG_DIR;
1858 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_DIR;
1861 case HCI_TIME_STAMP:
1862 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1868 hci_pi(sk)->cmsg_mask |= HCI_CMSG_TSTAMP;
1870 hci_pi(sk)->cmsg_mask &= ~HCI_CMSG_TSTAMP;
1875 struct hci_filter *f = &hci_pi(sk)->filter;
1877 uf.type_mask = f->type_mask;
1878 uf.opcode = f->opcode;
1879 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
1880 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
1883 len = min_t(unsigned int, len, sizeof(uf));
1884 if (copy_from_sockptr(&uf, optval, len)) {
1889 if (!capable(CAP_NET_RAW)) {
1890 uf.type_mask &= hci_sec_filter.type_mask;
1891 uf.event_mask[0] &= *((u32 *) hci_sec_filter.event_mask + 0);
1892 uf.event_mask[1] &= *((u32 *) hci_sec_filter.event_mask + 1);
1896 struct hci_filter *f = &hci_pi(sk)->filter;
1898 f->type_mask = uf.type_mask;
1899 f->opcode = uf.opcode;
1900 *((u32 *) f->event_mask + 0) = uf.event_mask[0];
1901 *((u32 *) f->event_mask + 1) = uf.event_mask[1];
1915 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
1916 sockptr_t optval, unsigned int len)
1918 struct sock *sk = sock->sk;
1922 BT_DBG("sk %p, opt %d", sk, optname);
1924 if (level == SOL_HCI)
1925 return hci_sock_setsockopt_old(sock, level, optname, optval,
1928 if (level != SOL_BLUETOOTH)
1929 return -ENOPROTOOPT;
1936 switch (hci_pi(sk)->channel) {
1937 /* Don't allow changing MTU for channels that are meant for HCI
1940 case HCI_CHANNEL_RAW:
1941 case HCI_CHANNEL_USER:
1946 if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
1951 hci_pi(sk)->mtu = opt;
1964 static int hci_sock_getsockopt_old(struct socket *sock, int level, int optname,
1965 char __user *optval, int __user *optlen)
1967 struct hci_ufilter uf;
1968 struct sock *sk = sock->sk;
1969 int len, opt, err = 0;
1971 BT_DBG("sk %p, opt %d", sk, optname);
1973 if (get_user(len, optlen))
1978 if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
1985 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_DIR)
1990 if (put_user(opt, optval))
1994 case HCI_TIME_STAMP:
1995 if (hci_pi(sk)->cmsg_mask & HCI_CMSG_TSTAMP)
2000 if (put_user(opt, optval))
2006 struct hci_filter *f = &hci_pi(sk)->filter;
2008 memset(&uf, 0, sizeof(uf));
2009 uf.type_mask = f->type_mask;
2010 uf.opcode = f->opcode;
2011 uf.event_mask[0] = *((u32 *) f->event_mask + 0);
2012 uf.event_mask[1] = *((u32 *) f->event_mask + 1);
2015 len = min_t(unsigned int, len, sizeof(uf));
2016 if (copy_to_user(optval, &uf, len))
2030 static int hci_sock_getsockopt(struct socket *sock, int level, int optname,
2031 char __user *optval, int __user *optlen)
2033 struct sock *sk = sock->sk;
2036 BT_DBG("sk %p, opt %d", sk, optname);
2038 if (level == SOL_HCI)
2039 return hci_sock_getsockopt_old(sock, level, optname, optval,
2042 if (level != SOL_BLUETOOTH)
2043 return -ENOPROTOOPT;
2050 if (put_user(hci_pi(sk)->mtu, (u16 __user *)optval))
2063 static void hci_sock_destruct(struct sock *sk)
2066 skb_queue_purge(&sk->sk_receive_queue);
2067 skb_queue_purge(&sk->sk_write_queue);
2070 static const struct proto_ops hci_sock_ops = {
2071 .family = PF_BLUETOOTH,
2072 .owner = THIS_MODULE,
2073 .release = hci_sock_release,
2074 .bind = hci_sock_bind,
2075 .getname = hci_sock_getname,
2076 .sendmsg = hci_sock_sendmsg,
2077 .recvmsg = hci_sock_recvmsg,
2078 .ioctl = hci_sock_ioctl,
2079 #ifdef CONFIG_COMPAT
2080 .compat_ioctl = hci_sock_compat_ioctl,
2082 .poll = datagram_poll,
2083 .listen = sock_no_listen,
2084 .shutdown = sock_no_shutdown,
2085 .setsockopt = hci_sock_setsockopt,
2086 .getsockopt = hci_sock_getsockopt,
2087 .connect = sock_no_connect,
2088 .socketpair = sock_no_socketpair,
2089 .accept = sock_no_accept,
2090 .mmap = sock_no_mmap
2093 static struct proto hci_sk_proto = {
2095 .owner = THIS_MODULE,
2096 .obj_size = sizeof(struct hci_pinfo)
2099 static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
2104 BT_DBG("sock %p", sock);
2106 if (sock->type != SOCK_RAW)
2107 return -ESOCKTNOSUPPORT;
2109 sock->ops = &hci_sock_ops;
2111 sk = sk_alloc(net, PF_BLUETOOTH, GFP_ATOMIC, &hci_sk_proto, kern);
2115 sock_init_data(sock, sk);
2117 sock_reset_flag(sk, SOCK_ZAPPED);
2119 sk->sk_protocol = protocol;
2121 sock->state = SS_UNCONNECTED;
2122 sk->sk_state = BT_OPEN;
2123 sk->sk_destruct = hci_sock_destruct;
2125 bt_sock_link(&hci_sk_list, sk);
2129 static const struct net_proto_family hci_sock_family_ops = {
2130 .family = PF_BLUETOOTH,
2131 .owner = THIS_MODULE,
2132 .create = hci_sock_create,
2135 int __init hci_sock_init(void)
2139 BUILD_BUG_ON(sizeof(struct sockaddr_hci) > sizeof(struct sockaddr));
2141 err = proto_register(&hci_sk_proto, 0);
2145 err = bt_sock_register(BTPROTO_HCI, &hci_sock_family_ops);
2147 BT_ERR("HCI socket registration failed");
2151 err = bt_procfs_init(&init_net, "hci", &hci_sk_list, NULL);
2153 BT_ERR("Failed to create HCI proc file");
2154 bt_sock_unregister(BTPROTO_HCI);
2158 BT_INFO("HCI socket layer initialized");
2163 proto_unregister(&hci_sk_proto);
2167 void hci_sock_cleanup(void)
2169 bt_procfs_cleanup(&init_net, "hci");
2170 bt_sock_unregister(BTPROTO_HCI);
2171 proto_unregister(&hci_sk_proto);