6 * SPDX-License-Identifier: BSD-2-Clause
8 * Copyright (c) 2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #include <sys/types.h>
34 #include <sys/sysctl.h>
37 #define L2CAP_SOCKET_CHECKED
38 #include <bluetooth.h>
47 #define MIN(a, b) (((a) < (b))? (a) : (b))
49 static int bt_devany_cb(int s, struct bt_devinfo const *di, void *xdevname);
50 static char * bt_dev2node (char const *devname, char *nodename, int nnlen);
51 static time_t bt_get_default_hci_command_timeout(void);
54 bt_devopen(char const *devname)
56 struct sockaddr_hci ha;
60 if (devname == NULL) {
65 memset(&ha, 0, sizeof(ha));
66 ha.hci_len = sizeof(ha);
67 ha.hci_family = AF_BLUETOOTH;
69 if (bt_aton(devname, &ba)) {
70 if (!bt_devname(ha.hci_node, &ba))
72 } else if (bt_dev2node(devname, ha.hci_node,
73 sizeof(ha.hci_node)) == NULL) {
78 s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
82 if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
83 connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0) {
98 bt_devsend(int s, uint16_t opcode, void *param, size_t plen)
104 if ((plen == 0 && param != NULL) ||
105 (plen > 0 && param == NULL) ||
112 iv[0].iov_len = sizeof(h);
115 h.type = NG_HCI_CMD_PKT;
116 h.opcode = htole16(opcode);
120 iv[1].iov_base = param;
121 iv[1].iov_len = plen;
126 while (writev(s, iv, ivn) < 0) {
127 if (errno == EAGAIN || errno == EINTR)
137 bt_devrecv(int s, void *buf, size_t size, time_t to)
141 if (buf == NULL || size == 0) {
156 while ((n = select(s + 1, &rfd, NULL, NULL, &tv)) < 0) {
157 if (errno == EAGAIN || errno == EINTR)
168 assert(FD_ISSET(s, &rfd));
171 while ((n = read(s, buf, size)) < 0) {
172 if (errno == EAGAIN || errno == EINTR)
178 switch (*((uint8_t *) buf)) {
179 case NG_HCI_CMD_PKT: {
180 ng_hci_cmd_pkt_t *h = (ng_hci_cmd_pkt_t *) buf;
182 if (n >= sizeof(*h) && n == (sizeof(*h) + h->length))
186 case NG_HCI_ACL_DATA_PKT: {
187 ng_hci_acldata_pkt_t *h = (ng_hci_acldata_pkt_t *) buf;
189 if (n >= sizeof(*h) && n == (sizeof(*h) + le16toh(h->length)))
193 case NG_HCI_SCO_DATA_PKT: {
194 ng_hci_scodata_pkt_t *h = (ng_hci_scodata_pkt_t *) buf;
196 if (n >= sizeof(*h) && n == (sizeof(*h) + h->length))
200 case NG_HCI_EVENT_PKT: {
201 ng_hci_event_pkt_t *h = (ng_hci_event_pkt_t *) buf;
203 if (n >= sizeof(*h) && n == (sizeof(*h) + h->length))
213 bt_devreq(int s, struct bt_devreq *r, time_t to)
215 uint8_t buf[320]; /* more than enough */
216 ng_hci_event_pkt_t *e = (ng_hci_event_pkt_t *) buf;
217 ng_hci_command_compl_ep *cc = (ng_hci_command_compl_ep *)(e+1);
218 ng_hci_command_status_ep *cs = (ng_hci_command_status_ep*)(e+1);
219 struct bt_devfilter old, new;
225 if (s < 0 || r == NULL || to < 0) {
230 if ((r->rlen == 0 && r->rparam != NULL) ||
231 (r->rlen > 0 && r->rparam == NULL)) {
236 memset(&new, 0, sizeof(new));
237 bt_devfilter_pkt_set(&new, NG_HCI_EVENT_PKT);
238 bt_devfilter_evt_set(&new, NG_HCI_EVENT_COMMAND_COMPL);
239 bt_devfilter_evt_set(&new, NG_HCI_EVENT_COMMAND_STATUS);
241 bt_devfilter_evt_set(&new, r->event);
243 if (bt_devfilter(s, &new, &old) < 0)
248 n = bt_devsend(s, r->opcode, r->cparam, r->clen);
254 opcode = htole16(r->opcode);
255 t_end = time(NULL) + to;
258 to = t_end - time(NULL);
262 n = bt_devrecv(s, buf, sizeof(buf), to);
268 if (e->type != NG_HCI_EVENT_PKT) {
276 case NG_HCI_EVENT_COMMAND_COMPL:
277 if (cc->opcode == opcode) {
282 memcpy(r->rparam, cc + 1, r->rlen);
289 case NG_HCI_EVENT_COMMAND_STATUS:
290 if (cs->opcode == opcode) {
291 if (r->event != NG_HCI_EVENT_COMMAND_STATUS) {
292 if (cs->status != 0) {
299 memcpy(r->rparam, cs, r->rlen);
308 if (e->event == r->event) {
311 memcpy(r->rparam, e + 1, r->rlen);
322 bt_devfilter(s, &old, NULL);
333 bt_devfilter(int s, struct bt_devfilter const *new, struct bt_devfilter *old)
335 struct ng_btsocket_hci_raw_filter f;
338 if (new == NULL && old == NULL) {
345 if (getsockopt(s, SOL_HCI_RAW, SO_HCI_RAW_FILTER, &f, &len) < 0)
348 memset(old, 0, sizeof(*old));
349 memcpy(old->packet_mask, &f.packet_mask,
350 MIN(sizeof(old->packet_mask), sizeof(f.packet_mask)));
351 memcpy(old->event_mask, &f.event_mask,
352 MIN(sizeof(old->event_mask), sizeof(f.packet_mask)));
356 memset(&f, 0, sizeof(f));
357 memcpy(&f.packet_mask, new->packet_mask,
358 MIN(sizeof(f.packet_mask), sizeof(new->event_mask)));
359 memcpy(&f.event_mask, new->event_mask,
360 MIN(sizeof(f.event_mask), sizeof(new->event_mask)));
363 if (setsockopt(s, SOL_HCI_RAW, SO_HCI_RAW_FILTER, &f, len) < 0)
371 bt_devfilter_pkt_set(struct bt_devfilter *filter, uint8_t type)
373 bit_set(filter->packet_mask, type - 1);
377 bt_devfilter_pkt_clr(struct bt_devfilter *filter, uint8_t type)
379 bit_clear(filter->packet_mask, type - 1);
383 bt_devfilter_pkt_tst(struct bt_devfilter const *filter, uint8_t type)
385 return (bit_test(filter->packet_mask, type - 1));
389 bt_devfilter_evt_set(struct bt_devfilter *filter, uint8_t event)
391 bit_set(filter->event_mask, event - 1);
395 bt_devfilter_evt_clr(struct bt_devfilter *filter, uint8_t event)
397 bit_clear(filter->event_mask, event - 1);
401 bt_devfilter_evt_tst(struct bt_devfilter const *filter, uint8_t event)
403 return (bit_test(filter->event_mask, event - 1));
407 bt_devinquiry(char const *devname, time_t length, int num_rsp,
408 struct bt_devinquiry **ii)
411 char _devname[HCI_DEVNAME_SIZE];
412 struct bt_devfilter f;
413 ng_hci_inquiry_cp *cp = (ng_hci_inquiry_cp *) buf;
414 ng_hci_event_pkt_t *e = (ng_hci_event_pkt_t *) buf;
415 ng_hci_inquiry_result_ep *ep = (ng_hci_inquiry_result_ep *)(e+1);
416 ng_hci_inquiry_response *ir;
417 struct bt_devinquiry *i;
425 if (devname == NULL) {
426 memset(_devname, 0, sizeof(_devname));
429 n = bt_devenum(bt_devany_cb, _devname);
438 s = bt_devopen(devname);
442 if (bt_devfilter(s, NULL, &f) < 0) {
447 bt_devfilter_evt_set(&f, NG_HCI_EVENT_INQUIRY_COMPL);
448 bt_devfilter_evt_set(&f, NG_HCI_EVENT_INQUIRY_RESULT);
450 if (bt_devfilter(s, &f, NULL) < 0) {
455 /* Always use GIAC LAP */
461 * Calculate inquire length in 1.28 second units
462 * v2.x specification says that 1.28 -> 61.44 seconds
463 * range is acceptable
468 else if (length == 1)
470 else if (length > 62)
473 cp->inquiry_length = (uint8_t)((length * 100) / 128);
475 if (num_rsp <= 0 || num_rsp > 255)
477 cp->num_responses = (uint8_t) num_rsp;
479 i = *ii = calloc(num_rsp, sizeof(struct bt_devinquiry));
487 NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL, NG_HCI_OCF_INQUIRY),
488 cp, sizeof(*cp)) < 0) {
496 n = bt_devrecv(s, buf, sizeof(buf), length);
503 if (n < sizeof(ng_hci_event_pkt_t)) {
511 case NG_HCI_EVENT_INQUIRY_COMPL:
514 case NG_HCI_EVENT_INQUIRY_RESULT:
515 ir = (ng_hci_inquiry_response *)(ep + 1);
517 for (n = 0; n < MIN(ep->num_responses, num_rsp); n ++) {
518 bdaddr_copy(&i->bdaddr, &ir->bdaddr);
519 i->pscan_rep_mode = ir->page_scan_rep_mode;
520 i->pscan_period_mode = ir->page_scan_period_mode;
521 memcpy(i->dev_class, ir->uclass, sizeof(i->dev_class));
522 i->clock_offset = le16toh(ir->clock_offset);
541 bt_devremote_name(char const *devname, const bdaddr_t *remote, time_t to,
542 uint16_t clk_off, uint8_t ps_rep_mode, uint8_t ps_mode)
544 char _devname[HCI_DEVNAME_SIZE];
546 ng_hci_remote_name_req_cp cp;
547 ng_hci_remote_name_req_compl_ep ep;
549 char *remote_name = NULL;
551 if (remote == NULL || to < 0) {
557 to = bt_get_default_hci_command_timeout();
563 if (devname == NULL) {
564 memset(_devname, 0, sizeof(_devname));
566 if (bt_devenum(bt_devany_cb, _devname) <= 0)
570 memset(&r, 0, sizeof(r));
571 memset(&cp, 0, sizeof(cp));
572 memset(&ep, 0, sizeof(ep));
573 cp.clock_offset = htole16(clk_off);
574 cp.page_scan_rep_mode = ps_rep_mode;
575 cp.page_scan_mode = ps_mode;
576 bdaddr_copy(&cp.bdaddr, remote);
577 r.opcode = NG_HCI_OPCODE(NG_HCI_OGF_LINK_CONTROL,
578 NG_HCI_OCF_REMOTE_NAME_REQ);
579 r.event = NG_HCI_EVENT_REMOTE_NAME_REQ_COMPL;
585 s = bt_devopen(devname);
589 if (bt_devreq(s, &r, to) == 0 || ep.status == 0x00)
590 remote_name = strndup((const char *)&ep.name, sizeof(ep.name));
594 return (remote_name);
598 bt_devinfo(struct bt_devinfo *di)
601 struct ng_btsocket_hci_raw_node_state r0;
602 struct ng_btsocket_hci_raw_node_bdaddr r1;
603 struct ng_btsocket_hci_raw_node_features r2;
604 struct ng_btsocket_hci_raw_node_buffer r3;
605 struct ng_btsocket_hci_raw_node_stat r4;
606 struct ng_btsocket_hci_raw_node_link_policy_mask r5;
607 struct ng_btsocket_hci_raw_node_packet_mask r6;
608 struct ng_btsocket_hci_raw_node_role_switch r7;
609 struct ng_btsocket_hci_raw_node_debug r8;
611 struct sockaddr_hci ha;
620 s = bt_devopen(di->devname);
627 if (getsockname(s, (struct sockaddr *) &ha, &halen) < 0)
629 strlcpy(di->devname, ha.hci_node, sizeof(di->devname));
631 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_STATE, &rp.r0, sizeof(rp.r0)) < 0)
633 di->state = rp.r0.state;
635 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_BDADDR, &rp.r1, sizeof(rp.r1)) < 0)
637 bdaddr_copy(&di->bdaddr, &rp.r1.bdaddr);
639 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_FEATURES, &rp.r2, sizeof(rp.r2)) < 0)
641 memcpy(di->features, rp.r2.features, sizeof(di->features));
643 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_BUFFER, &rp.r3, sizeof(rp.r3)) < 0)
645 di->cmd_free = rp.r3.buffer.cmd_free;
646 di->sco_size = rp.r3.buffer.sco_size;
647 di->sco_pkts = rp.r3.buffer.sco_pkts;
648 di->sco_free = rp.r3.buffer.sco_free;
649 di->acl_size = rp.r3.buffer.acl_size;
650 di->acl_pkts = rp.r3.buffer.acl_pkts;
651 di->acl_free = rp.r3.buffer.acl_free;
653 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_STAT, &rp.r4, sizeof(rp.r4)) < 0)
655 di->cmd_sent = rp.r4.stat.cmd_sent;
656 di->evnt_recv = rp.r4.stat.evnt_recv;
657 di->acl_recv = rp.r4.stat.acl_recv;
658 di->acl_sent = rp.r4.stat.acl_sent;
659 di->sco_recv = rp.r4.stat.sco_recv;
660 di->sco_sent = rp.r4.stat.sco_sent;
661 di->bytes_recv = rp.r4.stat.bytes_recv;
662 di->bytes_sent = rp.r4.stat.bytes_sent;
664 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_LINK_POLICY_MASK,
665 &rp.r5, sizeof(rp.r5)) < 0)
667 di->link_policy_info = rp.r5.policy_mask;
669 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_PACKET_MASK,
670 &rp.r6, sizeof(rp.r6)) < 0)
672 di->packet_type_info = rp.r6.packet_mask;
674 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_ROLE_SWITCH,
675 &rp.r7, sizeof(rp.r7)) < 0)
677 di->role_switch_info = rp.r7.role_switch;
679 if (ioctl(s, SIOC_HCI_RAW_NODE_GET_DEBUG, &rp.r8, sizeof(rp.r8)) < 0)
681 di->debug = rp.r8.debug;
691 bt_devenum(bt_devenum_cb_t cb, void *arg)
693 struct ng_btsocket_hci_raw_node_list_names rp;
694 struct bt_devinfo di;
695 struct sockaddr_hci ha;
698 rp.num_names = HCI_DEVMAX;
699 rp.names = (struct nodeinfo *) calloc(rp.num_names,
700 sizeof(struct nodeinfo));
701 if (rp.names == NULL) {
706 memset(&ha, 0, sizeof(ha));
707 ha.hci_len = sizeof(ha);
708 ha.hci_family = AF_BLUETOOTH;
709 ha.hci_node[0] = 'x';
711 s = socket(PF_BLUETOOTH, SOCK_RAW, BLUETOOTH_PROTO_HCI);
718 if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
719 connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
720 ioctl(s, SIOC_HCI_RAW_NODE_LIST_NAMES, &rp, sizeof(rp)) < 0) {
727 for (count = 0, i = 0; i < rp.num_names; i ++) {
728 strlcpy(di.devname, rp.names[i].name, sizeof(di.devname));
729 if (bt_devinfo(&di) < 0)
737 strlcpy(ha.hci_node, rp.names[i].name, sizeof(ha.hci_node));
738 if (bind(s, (struct sockaddr *) &ha, sizeof(ha)) < 0 ||
739 connect(s, (struct sockaddr *) &ha, sizeof(ha)) < 0)
742 if ((*cb)(s, &di, arg) > 0)
753 bt_devany_cb(int s, struct bt_devinfo const *di, void *xdevname)
755 strlcpy((char *) xdevname, di->devname, HCI_DEVNAME_SIZE);
760 bt_dev2node(char const *devname, char *nodename, int nnlen)
762 static char const * bt_dev_prefix[] = {
763 "ubt", /* Bluetooth USB devices */
764 NULL /* should be last */
767 static char _nodename[HCI_DEVNAME_SIZE];
772 if (nodename == NULL) {
773 nodename = _nodename;
774 nnlen = HCI_DEVNAME_SIZE;
777 for (p = bt_dev_prefix; *p != NULL; p ++) {
779 if (strncmp(devname, *p, plen) != 0)
782 unit = strtoul(devname + plen, &ep, 10);
784 strcmp(ep, "hci") != 0 &&
785 strcmp(ep, "l2cap") != 0)
786 return (NULL); /* can't make sense of device name */
788 snprintf(nodename, nnlen, "%s%uhci", *p, unit);
797 bt_get_default_hci_command_timeout(void)
800 size_t to_size = sizeof(to);
802 if (sysctlbyname("net.bluetooth.hci.command_timeout",
803 &to, &to_size, NULL, 0) < 0)
806 /* Should not happen */