1 /* $DragonFly: src/sys/netbt/hci_link.c,v 1.2 2008/03/18 13:41:42 hasso Exp $ */
2 /* $OpenBSD: src/sys/netbt/hci_link.c,v 1.7 2008/02/24 21:34:48 uwe Exp $ */
3 /* $NetBSD: hci_link.c,v 1.16 2007/11/10 23:12:22 plunky Exp $ */
6 * Copyright (c) 2005 Iain Hibbert.
7 * Copyright (c) 2006 Itronix Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The name of Itronix Inc. may not be used to endorse
19 * or promote products derived from this software without specific
20 * prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
26 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
27 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29 * ON ANY THEORY OF LIABILITY, WHETHER IN
30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
32 * POSSIBILITY OF SUCH DAMAGE.
35 #include <sys/param.h>
36 #include <sys/kernel.h>
37 #include <sys/malloc.h>
40 #include <sys/queue.h>
41 #include <sys/systm.h>
42 #include <sys/endian.h>
43 #include <sys/callout.h>
45 #include <net/pf/pfvar.h>
48 #include <netbt/bluetooth.h>
49 #include <netbt/hci.h>
50 #include <netbt/l2cap.h>
51 #include <netbt/sco.h>
53 /*******************************************************************************
59 * Automatically expire unused ACL connections after this number of
60 * seconds (if zero, do not expire unused connections) [sysctl]
62 int hci_acl_expiry = 10; /* seconds */
65 * hci_acl_open(unit, bdaddr)
67 * open ACL connection to remote bdaddr. Only one ACL connection is permitted
68 * between any two Bluetooth devices, so we look for an existing one before
69 * trying to start a new one.
72 hci_acl_open(struct hci_unit *unit, bdaddr_t *bdaddr)
74 struct hci_link *link;
75 struct hci_memo *memo;
79 KKASSERT(unit != NULL);
80 KKASSERT(bdaddr != NULL);
82 link = hci_link_lookup_bdaddr(unit, bdaddr, HCI_LINK_ACL);
84 link = hci_link_alloc(unit);
88 link->hl_type = HCI_LINK_ACL;
89 bdaddr_copy(&link->hl_bdaddr, bdaddr);
92 switch(link->hl_state) {
95 * open connection to remote device
97 memset(&cp, 0, sizeof(cp));
98 bdaddr_copy(&cp.bdaddr, bdaddr);
99 cp.pkt_type = htole16(unit->hci_packet_type);
101 memo = hci_memo_find(unit, bdaddr);
103 cp.page_scan_rep_mode = memo->page_scan_rep_mode;
104 cp.page_scan_mode = memo->page_scan_mode;
105 cp.clock_offset = memo->clock_offset;
108 if (unit->hci_link_policy & HCI_LINK_POLICY_ENABLE_ROLE_SWITCH)
109 cp.accept_role_switch = 1;
111 err = hci_send_cmd(unit, HCI_CMD_CREATE_CON, &cp, sizeof(cp));
113 hci_link_free(link, err);
117 link->hl_state = HCI_LINK_WAIT_CONNECT;
120 case HCI_LINK_WAIT_CONNECT:
121 case HCI_LINK_WAIT_AUTH:
122 case HCI_LINK_WAIT_ENCRYPT:
123 case HCI_LINK_WAIT_SECURE:
125 * somebody else already trying to connect, we just
126 * sit on the bench with them..
132 * If already open, halt any expiry callouts. We dont need
133 * to care about already invoking callouts since refcnt >0
134 * will keep the link alive.
136 callout_stop(&link->hl_expire);
140 UNKNOWN(link->hl_state);
151 * Close ACL connection. When there are no more references to this link,
152 * we can either close it down or schedule a delayed closedown.
155 hci_acl_close(struct hci_link *link, int err)
157 KKASSERT(link != NULL);
159 if (--link->hl_refcnt == 0) {
160 if (link->hl_state == HCI_LINK_CLOSED)
161 hci_link_free(link, err);
162 else if (hci_acl_expiry > 0)
163 callout_reset(&link->hl_expire, hci_acl_expiry * hz,
164 hci_acl_timeout, link);
169 * Incoming ACL connection.
171 * For now, we accept all connections but it would be better to check
172 * the L2CAP listen list and only accept when there is a listener
175 * There should not be a link to the same bdaddr already, we check
176 * anyway though its left unhandled for now.
179 hci_acl_newconn(struct hci_unit *unit, bdaddr_t *bdaddr)
181 struct hci_link *link;
183 link = hci_link_lookup_bdaddr(unit, bdaddr, HCI_LINK_ACL);
187 link = hci_link_alloc(unit);
189 link->hl_state = HCI_LINK_WAIT_CONNECT;
190 link->hl_type = HCI_LINK_ACL;
191 bdaddr_copy(&link->hl_bdaddr, bdaddr);
193 if (hci_acl_expiry > 0)
194 callout_reset(&link->hl_expire, hci_acl_expiry * hz,
195 hci_acl_timeout, link);
202 hci_acl_timeout(void *arg)
204 struct hci_link *link = arg;
210 if (link->hl_refcnt > 0)
213 DPRINTF("link #%d expired\n", link->hl_handle);
215 switch (link->hl_state) {
216 case HCI_LINK_CLOSED:
217 case HCI_LINK_WAIT_CONNECT:
218 hci_link_free(link, ECONNRESET);
221 case HCI_LINK_WAIT_AUTH:
222 case HCI_LINK_WAIT_ENCRYPT:
223 case HCI_LINK_WAIT_SECURE:
225 cp.con_handle = htole16(link->hl_handle);
226 cp.reason = 0x13; /* "Remote User Terminated Connection" */
228 err = hci_send_cmd(link->hl_unit, HCI_CMD_DISCONNECT,
232 DPRINTF("error %d sending HCI_CMD_DISCONNECT\n",
239 UNKNOWN(link->hl_state);
248 * Initiate any Link Mode change requests.
251 hci_acl_setmode(struct hci_link *link)
255 KKASSERT(link != NULL);
256 KKASSERT(link->hl_unit != NULL);
258 if (link->hl_state != HCI_LINK_OPEN)
261 if ((link->hl_flags & HCI_LINK_AUTH_REQ)
262 && !(link->hl_flags & HCI_LINK_AUTH)) {
265 DPRINTF("(%s) requesting auth for handle #%d\n",
266 device_get_nameunit(link->hl_unit->hci_dev),
269 link->hl_state = HCI_LINK_WAIT_AUTH;
270 cp.con_handle = htole16(link->hl_handle);
271 err = hci_send_cmd(link->hl_unit, HCI_CMD_AUTH_REQ,
274 return (err == 0 ? EINPROGRESS : err);
277 if ((link->hl_flags & HCI_LINK_ENCRYPT_REQ)
278 && !(link->hl_flags & HCI_LINK_ENCRYPT)) {
279 hci_set_con_encryption_cp cp;
281 /* XXX we should check features for encryption capability */
283 DPRINTF("(%s) requesting encryption for handle #%d\n",
284 device_get_nameunit(link->hl_unit->hci_dev),
287 link->hl_state = HCI_LINK_WAIT_ENCRYPT;
288 cp.con_handle = htole16(link->hl_handle);
289 cp.encryption_enable = 0x01;
291 err = hci_send_cmd(link->hl_unit, HCI_CMD_SET_CON_ENCRYPTION,
294 return (err == 0 ? EINPROGRESS : err);
297 if ((link->hl_flags & HCI_LINK_SECURE_REQ)) {
298 hci_change_con_link_key_cp cp;
300 /* always change link key for SECURE requests */
301 link->hl_flags &= ~HCI_LINK_SECURE;
303 DPRINTF("(%s) changing link key for handle #%d\n",
304 device_get_nameunit(link->hl_unit->hci_dev),
307 link->hl_state = HCI_LINK_WAIT_SECURE;
308 cp.con_handle = htole16(link->hl_handle);
310 err = hci_send_cmd(link->hl_unit, HCI_CMD_CHANGE_CON_LINK_KEY,
313 return (err == 0 ? EINPROGRESS : err);
322 * This is called from event handlers when the mode change
323 * is complete. We notify upstream and restart the link.
326 hci_acl_linkmode(struct hci_link *link)
328 struct l2cap_channel *chan, *next;
331 DPRINTF("(%s) handle #%d, auth %s, encrypt %s, secure %s\n",
332 device_get_nameunit(link->hl_unit->hci_dev), link->hl_handle,
333 (link->hl_flags & HCI_LINK_AUTH ? "on" : "off"),
334 (link->hl_flags & HCI_LINK_ENCRYPT ? "on" : "off"),
335 (link->hl_flags & HCI_LINK_SECURE ? "on" : "off"));
337 if (link->hl_flags & HCI_LINK_AUTH)
338 mode |= L2CAP_LM_AUTH;
340 if (link->hl_flags & HCI_LINK_ENCRYPT)
341 mode |= L2CAP_LM_ENCRYPT;
343 if (link->hl_flags & HCI_LINK_SECURE)
344 mode |= L2CAP_LM_SECURE;
347 * The link state will only be OPEN here if the mode change
348 * was successful. So, we can proceed with L2CAP connections,
349 * or notify already establshed channels, to allow any that
350 * are dissatisfied to disconnect before we restart.
352 next = LIST_FIRST(&l2cap_active_list);
353 while ((chan = next) != NULL) {
354 next = LIST_NEXT(chan, lc_ncid);
356 if (chan->lc_link != link)
359 switch(chan->lc_state) {
360 case L2CAP_WAIT_SEND_CONNECT_REQ: /* we are connecting */
361 if ((mode & chan->lc_mode) != chan->lc_mode) {
362 l2cap_close(chan, ECONNABORTED);
366 chan->lc_state = L2CAP_WAIT_RECV_CONNECT_RSP;
367 err = l2cap_send_connect_req(chan);
369 l2cap_close(chan, err);
374 case L2CAP_WAIT_SEND_CONNECT_RSP: /* they are connecting */
375 if ((mode & chan->lc_mode) != chan->lc_mode) {
376 l2cap_send_connect_rsp(link, chan->lc_ident,
378 L2CAP_SECURITY_BLOCK);
380 l2cap_close(chan, ECONNABORTED);
384 l2cap_send_connect_rsp(link, chan->lc_ident,
385 chan->lc_lcid, chan->lc_rcid,
388 chan->lc_state = L2CAP_WAIT_CONFIG;
389 chan->lc_flags |= (L2CAP_WAIT_CONFIG_RSP | L2CAP_WAIT_CONFIG_REQ);
390 err = l2cap_send_config_req(chan);
392 l2cap_close(chan, err);
397 case L2CAP_WAIT_RECV_CONNECT_RSP:
398 case L2CAP_WAIT_CONFIG:
399 case L2CAP_OPEN: /* already established */
400 (*chan->lc_proto->linkmode)(chan->lc_upper, mode);
408 link->hl_state = HCI_LINK_OPEN;
415 * we accumulate packet fragments on the hci_link structure
416 * until a full L2CAP frame is ready, then send it on.
419 hci_acl_recv(struct mbuf *m, struct hci_unit *unit)
421 struct hci_link *link;
422 hci_acldata_hdr_t hdr;
423 uint16_t handle, want;
427 KKASSERT(unit != NULL);
429 KKASSERT(m->m_pkthdr.len >= sizeof(hdr));
430 m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
431 m_adj(m, sizeof(hdr));
434 if (hdr.type != HCI_ACL_DATA_PKT) {
435 kprintf("%s: bad ACL packet type\n",
436 device_get_nameunit(unit->hci_dev));
440 if (m->m_pkthdr.len != letoh16(hdr.length)) {
441 kprintf("%s: bad ACL packet length (%d != %d)\n",
442 device_get_nameunit(unit->hci_dev), m->m_pkthdr.len,
443 letoh16(hdr.length));
448 hdr.length = letoh16(hdr.length);
449 hdr.con_handle = letoh16(hdr.con_handle);
450 handle = HCI_CON_HANDLE(hdr.con_handle);
451 pb = HCI_PB_FLAG(hdr.con_handle);
453 link = hci_link_lookup_handle(unit, handle);
457 DPRINTF("%s: dumping packet for unknown handle #%d\n",
458 device_get_nameunit(unit->hci_dev), handle);
461 * There is no way to find out what this connection handle is
462 * for, just get rid of it. This may happen, if a USB dongle
463 * is plugged into a self powered hub and does not reset when
464 * the system is shut down.
466 cp.con_handle = htole16(handle);
467 cp.reason = 0x13; /* "Remote User Terminated Connection" */
468 hci_send_cmd(unit, HCI_CMD_DISCONNECT, &cp, sizeof(cp));
473 case HCI_PACKET_START:
474 if (link->hl_rxp != NULL)
475 kprintf("%s: dropped incomplete ACL packet\n",
476 device_get_nameunit(unit->hci_dev));
478 if (m->m_pkthdr.len < sizeof(l2cap_hdr_t)) {
479 kprintf("%s: short ACL packet\n",
480 device_get_nameunit(unit->hci_dev));
486 got = m->m_pkthdr.len;
489 case HCI_PACKET_FRAGMENT:
490 if (link->hl_rxp == NULL) {
491 kprintf("%s: unexpected packet fragment\n",
492 device_get_nameunit(unit->hci_dev));
497 got = m->m_pkthdr.len + link->hl_rxp->m_pkthdr.len;
498 m_cat(link->hl_rxp, m);
500 m->m_pkthdr.len = got;
504 kprintf("%s: unknown packet type\n",
505 device_get_nameunit(unit->hci_dev));
510 m_copydata(m, 0, sizeof(want), (caddr_t)&want);
511 want = letoh16(want) + sizeof(l2cap_hdr_t) - got;
519 l2cap_recv_frame(m, link);
528 * Send ACL data on link
530 * We must fragment packets into chunks of less than unit->hci_max_acl_size and
531 * prepend a relevant ACL header to each fragment. We keep a PDU structure
532 * attached to the link, so that completed fragments can be marked off and
533 * more data requested from above once the PDU is sent.
536 hci_acl_send(struct mbuf *m, struct hci_link *link,
537 struct l2cap_channel *chan)
539 struct l2cap_pdu *pdu;
540 struct mbuf *n = NULL;
541 int plen, mlen, num = 0;
543 KKASSERT(link != NULL);
545 KKASSERT(m->m_flags & M_PKTHDR);
546 KKASSERT(m->m_pkthdr.len > 0);
548 if (link->hl_state == HCI_LINK_CLOSED) {
553 pdu = pool_get(&l2cap_pdu_pool, PR_NOWAIT);
557 bzero(pdu, sizeof *pdu);
561 plen = m->m_pkthdr.len;
562 mlen = link->hl_unit->hci_max_acl_size;
564 DPRINTFN(5, "%s: handle #%d, plen = %d, max = %d\n",
565 device_get_nameunit(link->hl_unit->hci_dev),
566 link->hl_handle, plen, mlen);
570 n = m_split(m, mlen, MB_DONTWAIT);
578 m->m_flags |= M_PROTO1; /* tag first fragment */
580 DPRINTFN(10, "(%s) chunk of %d (plen = %d) bytes\n",
581 device_get_nameunit(link->hl_unit->hci_dev), mlen, plen);
582 IF_ENQUEUE(&pdu->lp_data, m);
587 TAILQ_INSERT_TAIL(&link->hl_txq, pdu, lp_next);
588 link->hl_txqlen += num;
597 IF_DRAIN(&pdu->lp_data);
598 pool_put(&l2cap_pdu_pool, pdu);
605 * Start sending ACL data on link.
607 * This is called when the queue may need restarting: as new data
608 * is queued, after link mode changes have completed, or when device
609 * buffers have cleared.
611 * We may use all the available packet slots. The reason that we add
612 * the ACL encapsulation here rather than in hci_acl_send() is that L2CAP
613 * signal packets may be queued before the handle is given to us..
616 hci_acl_start(struct hci_link *link)
618 struct hci_unit *unit;
619 hci_acldata_hdr_t *hdr;
620 struct l2cap_pdu *pdu;
624 KKASSERT(link != NULL);
626 unit = link->hl_unit;
627 KKASSERT(unit != NULL);
629 /* this is mainly to block ourselves (below) */
630 if (link->hl_state != HCI_LINK_OPEN)
633 if (link->hl_txqlen == 0 || unit->hci_num_acl_pkts == 0)
636 /* find first PDU with data to send */
637 pdu = TAILQ_FIRST(&link->hl_txq);
642 if (!IF_QEMPTY(&pdu->lp_data))
645 pdu = TAILQ_NEXT(pdu, lp_next);
648 while (unit->hci_num_acl_pkts > 0) {
649 IF_DEQUEUE(&pdu->lp_data, m);
652 if (m->m_flags & M_PROTO1)
653 handle = HCI_MK_CON_HANDLE(link->hl_handle,
654 HCI_PACKET_START, 0);
656 handle = HCI_MK_CON_HANDLE(link->hl_handle,
657 HCI_PACKET_FRAGMENT, 0);
659 M_PREPEND(m, sizeof(*hdr), MB_DONTWAIT);
663 hdr = mtod(m, hci_acldata_hdr_t *);
664 hdr->type = HCI_ACL_DATA_PKT;
665 hdr->con_handle = htole16(handle);
666 hdr->length = htole16(m->m_pkthdr.len - sizeof(*hdr));
671 hci_output_acl(unit, m);
673 if (IF_QEMPTY(&pdu->lp_data)) {
676 * This should enable streaming of PDUs - when
677 * we have placed all the fragments on the acl
678 * output queue, we trigger the L2CAP layer to
679 * send us down one more. Use a false state so
680 * we dont run into ourselves coming back from
683 link->hl_state = HCI_LINK_BLOCK;
684 l2cap_start(pdu->lp_chan);
685 link->hl_state = HCI_LINK_OPEN;
688 pdu = TAILQ_NEXT(pdu, lp_next);
695 * We had our turn now, move to the back of the queue to let
696 * other links have a go at the output buffers..
698 if (TAILQ_NEXT(link, hl_next)) {
699 TAILQ_REMOVE(&unit->hci_links, link, hl_next);
700 TAILQ_INSERT_TAIL(&unit->hci_links, link, hl_next);
705 * Confirm ACL packets cleared from Controller buffers. We scan our PDU
706 * list to clear pending fragments and signal upstream for more data
707 * when a PDU is complete.
710 hci_acl_complete(struct hci_link *link, int num)
712 struct l2cap_pdu *pdu;
713 struct l2cap_channel *chan;
715 DPRINTFN(5, "(%s) handle #%d (%d)\n",
716 device_get_nameunit(link->hl_unit->hci_dev), link->hl_handle, num);
719 pdu = TAILQ_FIRST(&link->hl_txq);
721 kprintf("%s: %d packets completed on handle #%x "
722 "but none pending!\n",
723 device_get_nameunit(link->hl_unit->hci_dev),
724 num, link->hl_handle);
728 if (num >= pdu->lp_pending) {
729 num -= pdu->lp_pending;
732 if (IF_QEMPTY(&pdu->lp_data)) {
733 TAILQ_REMOVE(&link->hl_txq, pdu, lp_next);
737 (*chan->lc_proto->complete)
740 if (chan->lc_pending == 0)
744 pool_put(&l2cap_pdu_pool, pdu);
747 pdu->lp_pending -= num;
753 /*******************************************************************************
755 * HCI SCO Connections
759 * Incoming SCO Connection. We check the list for anybody willing
763 hci_sco_newconn(struct hci_unit *unit, bdaddr_t *bdaddr)
765 struct sockaddr_bt laddr, raddr;
766 struct sco_pcb *pcb, *new;
767 struct hci_link *sco, *acl;
769 memset(&laddr, 0, sizeof(laddr));
770 laddr.bt_len = sizeof(laddr);
771 laddr.bt_family = AF_BLUETOOTH;
772 bdaddr_copy(&laddr.bt_bdaddr, &unit->hci_bdaddr);
774 memset(&raddr, 0, sizeof(raddr));
775 raddr.bt_len = sizeof(raddr);
776 raddr.bt_family = AF_BLUETOOTH;
777 bdaddr_copy(&raddr.bt_bdaddr, bdaddr);
780 * There should already be an ACL link up and running before
781 * the controller sends us SCO connection requests, but you
784 acl = hci_link_lookup_bdaddr(unit, bdaddr, HCI_LINK_ACL);
785 if (acl == NULL || acl->hl_state != HCI_LINK_OPEN)
788 LIST_FOREACH(pcb, &sco_pcb, sp_next) {
789 if ((pcb->sp_flags & SP_LISTENING) == 0)
792 new = (*pcb->sp_proto->newconn)(pcb->sp_upper, &laddr, &raddr);
797 * Ok, got new pcb so we can start a new link and fill
798 * in all the details.
800 bdaddr_copy(&new->sp_laddr, &unit->hci_bdaddr);
801 bdaddr_copy(&new->sp_raddr, bdaddr);
803 sco = hci_link_alloc(unit);
809 sco->hl_type = HCI_LINK_SCO;
810 bdaddr_copy(&sco->hl_bdaddr, bdaddr);
812 sco->hl_link = hci_acl_open(unit, bdaddr);
813 KKASSERT(sco->hl_link == acl);
818 new->sp_mtu = unit->hci_max_sco_size;
826 * receive SCO packet, we only need to strip the header and send
827 * it to the right handler
830 hci_sco_recv(struct mbuf *m, struct hci_unit *unit)
832 struct hci_link *link;
833 hci_scodata_hdr_t hdr;
837 KKASSERT(unit != NULL);
839 KKASSERT(m->m_pkthdr.len >= sizeof(hdr));
840 m_copydata(m, 0, sizeof(hdr), (caddr_t)&hdr);
841 m_adj(m, sizeof(hdr));
844 if (hdr.type != HCI_SCO_DATA_PKT) {
845 kprintf("%s: bad SCO packet type\n",
846 device_get_nameunit(unit->hci_dev));
850 if (m->m_pkthdr.len != hdr.length) {
851 kprintf("%s: bad SCO packet length (%d != %d)\n",
852 device_get_nameunit(unit->hci_dev), m->m_pkthdr.len,
858 hdr.con_handle = letoh16(hdr.con_handle);
859 handle = HCI_CON_HANDLE(hdr.con_handle);
861 link = hci_link_lookup_handle(unit, handle);
862 if (link == NULL || link->hl_type == HCI_LINK_ACL) {
863 DPRINTF("%s: dumping packet for unknown handle #%d\n",
864 device_get_nameunit(unit->hci_dev), handle);
869 (*link->hl_sco->sp_proto->input)(link->hl_sco->sp_upper, m);
877 hci_sco_start(struct hci_link *link)
882 * SCO packets have completed at the controller, so we can
883 * signal up to free the buffer space.
886 hci_sco_complete(struct hci_link *link, int num)
889 DPRINTFN(5, "handle #%d (num=%d)\n", link->hl_handle, num);
890 link->hl_sco->sp_pending--;
891 (*link->hl_sco->sp_proto->complete)(link->hl_sco->sp_upper, num);
894 /*******************************************************************************
896 * Generic HCI Connection alloc/free/lookup etc
900 hci_link_alloc(struct hci_unit *unit)
902 struct hci_link *link;
904 KKASSERT(unit != NULL);
906 link = kmalloc(sizeof *link, M_BLUETOOTH, M_NOWAIT | M_ZERO);
910 link->hl_unit = unit;
911 link->hl_state = HCI_LINK_CLOSED;
913 /* init ACL portion */
914 callout_init(&link->hl_expire);
917 TAILQ_INIT(&link->hl_txq); /* outgoing packets */
918 TAILQ_INIT(&link->hl_reqs); /* request queue */
920 link->hl_mtu = L2CAP_MTU_DEFAULT; /* L2CAP signal mtu */
921 link->hl_flush = L2CAP_FLUSH_TIMO_DEFAULT; /* flush timeout */
923 /* init SCO portion */
924 /* &link->hl_data is already zero-initialized. */
927 TAILQ_INSERT_HEAD(&unit->hci_links, link, hl_next);
933 hci_link_free(struct hci_link *link, int err)
935 struct l2cap_req *req;
936 struct l2cap_pdu *pdu;
937 struct l2cap_channel *chan, *next;
939 KKASSERT(link != NULL);
941 DPRINTF("(%s) #%d, type = %d, state = %d, refcnt = %d\n",
942 device_get_nameunit(link->hl_unit->hci_dev), link->hl_handle,
943 link->hl_type, link->hl_state, link->hl_refcnt);
945 /* ACL reference count */
946 if (link->hl_refcnt > 0) {
947 next = LIST_FIRST(&l2cap_active_list);
948 while ((chan = next) != NULL) {
949 next = LIST_NEXT(chan, lc_ncid);
950 if (chan->lc_link == link)
951 l2cap_close(chan, err);
954 KKASSERT(link->hl_refcnt == 0);
956 /* ACL L2CAP requests.. */
957 while ((req = TAILQ_FIRST(&link->hl_reqs)) != NULL)
958 l2cap_request_free(req);
960 KKASSERT(TAILQ_EMPTY(&link->hl_reqs));
962 /* ACL outgoing data queue */
963 while ((pdu = TAILQ_FIRST(&link->hl_txq)) != NULL) {
964 TAILQ_REMOVE(&link->hl_txq, pdu, lp_next);
965 IF_DRAIN(&pdu->lp_data);
967 link->hl_unit->hci_num_acl_pkts += pdu->lp_pending;
969 pool_put(&l2cap_pdu_pool, pdu);
972 KKASSERT(TAILQ_EMPTY(&link->hl_txq));
974 /* ACL incoming data packet */
975 if (link->hl_rxp != NULL) {
976 m_freem(link->hl_rxp);
980 /* SCO master ACL link */
981 if (link->hl_link != NULL) {
982 hci_acl_close(link->hl_link, err);
983 link->hl_link = NULL;
987 if (link->hl_sco != NULL) {
993 (*pcb->sp_proto->disconnected)(pcb->sp_upper, err);
996 /* flush any SCO data */
998 IF_DRAIN(&link->hl_data);
1002 * Halt the timeout - if its already running we cannot free the
1003 * link structure but the timeout function will call us back in
1006 link->hl_state = HCI_LINK_CLOSED;
1007 callout_stop(&link->hl_expire);
1008 if (callout_active(&link->hl_expire))
1012 * If we made a note of clock offset, keep it in a memo
1013 * to facilitate reconnections to this device
1015 if (link->hl_clock != 0) {
1016 struct hci_memo *memo;
1018 memo = hci_memo_new(link->hl_unit, &link->hl_bdaddr);
1020 memo->clock_offset = link->hl_clock;
1024 TAILQ_REMOVE(&link->hl_unit->hci_links, link, hl_next);
1026 kfree(link, M_BLUETOOTH);
1030 * Lookup HCI link by type and state.
1033 hci_link_lookup_state(struct hci_unit *unit, uint16_t type, uint16_t state)
1035 struct hci_link *link;
1037 TAILQ_FOREACH(link, &unit->hci_links, hl_next) {
1038 if (link->hl_type == type && link->hl_state == state)
1046 * Lookup HCI link by address and type. Note that for SCO links there may
1047 * be more than one link per address, so we only return links with no
1048 * handle (ie new links)
1051 hci_link_lookup_bdaddr(struct hci_unit *unit, bdaddr_t *bdaddr, uint16_t type)
1053 struct hci_link *link;
1055 KKASSERT(unit != NULL);
1056 KKASSERT(bdaddr != NULL);
1058 TAILQ_FOREACH(link, &unit->hci_links, hl_next) {
1059 if (link->hl_type != type)
1062 if (type == HCI_LINK_SCO && link->hl_handle != 0)
1065 if (bdaddr_same(&link->hl_bdaddr, bdaddr))
1073 hci_link_lookup_handle(struct hci_unit *unit, uint16_t handle)
1075 struct hci_link *link;
1077 KKASSERT(unit != NULL);
1079 TAILQ_FOREACH(link, &unit->hci_links, hl_next) {
1080 if (handle == link->hl_handle)