tools/hcitool.c

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2000-2001  Qualcomm Incorporated
 *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
 *  Copyright (C) 2002-2004  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation;
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
 *  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
 *  CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES 
 *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 
 *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 
 *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *  ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, 
 *  COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS 
 *  SOFTWARE IS DISCLAIMED.
 *
 *
 *  $Id$
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>

#include <termios.h>
#include <fcntl.h>
#include <getopt.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>

#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>

extern int optind,opterr,optopt;
extern char *optarg;

#define for_each_opt(opt, long, short) while ((opt=getopt_long(argc, argv, short ? short:"+", long, NULL)) != -1)

static void usage(void);

static int dev_info(int s, int dev_id, long arg)
{
	struct hci_dev_info di = {dev_id: dev_id};
	char addr[18];

	if (ioctl(s, HCIGETDEVINFO, (void *) &di))
		return 0;

	ba2str(&di.bdaddr, addr);
	printf("\t%s\t%s\n", di.name, addr);
	return 0;
}

static int conn_list(int s, int dev_id, long arg)
{
	struct hci_conn_list_req *cl;
	struct hci_conn_info *ci;
	int id = arg;
	int i;

	if (id != -1 && dev_id != id)
		return 0;

	if (!(cl = malloc(10 * sizeof(*ci) + sizeof(*cl)))) {
		perror("Can't allocate memory");
		exit(1);
	}
	cl->dev_id = dev_id;
	cl->conn_num = 10;
	ci = cl->conn_info;

	if (ioctl(s, HCIGETCONNLIST, (void *) cl)) {
		perror("Can't get connection list");
		exit(1);
	}

	for (i = 0; i < cl->conn_num; i++, ci++) {
		char addr[18];
		ba2str(&ci->bdaddr, addr);
		printf("\t%s %s %s handle %d state %d lm %s\n",
			ci->out ? "<" : ">",
			ci->type == ACL_LINK ? "ACL" : "SCO",
			addr, ci->handle, ci->state,
			hci_lmtostr(ci->link_mode));
	}

	return 0;
}

static int find_conn(int s, int dev_id, long arg)
{
	struct hci_conn_list_req *cl;
	struct hci_conn_info *ci;
	int i;

	if (!(cl = malloc(10 * sizeof(*ci) + sizeof(*cl)))) {
		perror("Can't allocate memory");
		exit(1);
	}
	cl->dev_id = dev_id;
	cl->conn_num = 10;
	ci = cl->conn_info;

	if (ioctl(s, HCIGETCONNLIST, (void *) cl)) {
		perror("Can't get connection list");
		exit(1);
	}

	for (i = 0; i < cl->conn_num; i++, ci++)
		if (!bacmp((bdaddr_t *) arg, &ci->bdaddr))
			return 1;

	return 0;
}

static void hex_dump(char *pref, int width, unsigned char *buf, int len)
{
	register int i,n;

	for (i = 0, n = 1; i < len; i++, n++) {
		if (n == 1)
			printf("%s", pref);
		printf("%2.2X ", buf[i]);
		if (n == width) {
			printf("\n");
			n = 0;
		}
	}
	if (i && n!=1)
		printf("\n");
}

/* Display local devices */

static struct option dev_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *dev_help = 
	"Usage:\n"
	"\tdev\n";

static void cmd_dev(int dev_id, int argc, char **argv)
{
	int opt;
	for_each_opt(opt, dev_options, NULL) {
		switch (opt) {
		default:
			printf(dev_help);
			return;
		}
	}

	printf("Devices:\n");
	hci_for_each_dev(HCI_UP, dev_info, 0);
}

/* Inquiry */

static struct option inq_options[] = {
	{"help",	0,0, 'h'},
	{"length",	1,0, 'l'},
	{"numrsp",	1,0, 'n'},
	{"flush",	0,0, 'f'},
	{0, 0, 0, 0}
};

static char *inq_help = 
	"Usage:\n"
	"\tinq [--length=N] maximum inquiry duration in 1.28 s units\n"
	"\t    [--numrsp=N] specify maximum number of inquiry responses\n"
	"\t    [--flush]    flush the inquiry cache\n";

static void cmd_inq(int dev_id, int argc, char **argv)
{
	int num_rsp, length, flags;
	inquiry_info *info = NULL;
	char addr[18];
	int i, opt;

	length  = 8;	/* ~10 seconds */
	num_rsp = 100;
	flags   = 0;

	for_each_opt(opt, inq_options, NULL) {
		switch (opt) {
		case 'l':
			length = atoi(optarg);
			break;

		case 'n':
			num_rsp = atoi(optarg);
			break;

		case 'f':
			flags |= IREQ_CACHE_FLUSH;
			break;

		default:
			printf(inq_help);
			return;
		}
	}

	printf("Inquiring ...\n");
	num_rsp = hci_inquiry(dev_id, length, num_rsp, NULL, &info, flags);
	if (num_rsp < 0) {
		perror("Inquiry failed.");
		exit(1);
	}

	for (i = 0; i < num_rsp; i++) {
		ba2str(&(info+i)->bdaddr, addr);
		printf("\t%s\tclock offset: 0x%4.4x\tclass: 0x%2.2x%2.2x%2.2x\n",
			addr, (info+i)->clock_offset,
			(info+i)->dev_class[2], 
			(info+i)->dev_class[1], 
			(info+i)->dev_class[0]);
	}
	free(info);
}

/* Device scanning */

static struct option scan_options[] = {
	{"help",	0,0, 'h'},
	{"length",	1,0, 'l'},
	{"numrsp",	1,0, 'n'},
	{"flush",	0,0, 'f'},
	{0, 0, 0, 0}
};

static char *scan_help = 
	"Usage:\n"
	"\tscan [--length=N] [--numrsp=N] [--flush]\n";

static void cmd_scan(int dev_id, int argc, char **argv)
{
	inquiry_info *info = NULL;
	int num_rsp, length, flags;
	char addr[18];
	char name[248];
	int i, opt, dd;

	length  = 8;	/* ~10 seconds */
	num_rsp = 100;
	flags   = 0;

	for_each_opt(opt, scan_options, NULL) {
		switch (opt) {
		case 'l':
			length = atoi(optarg);
			break;

		case 'n':
			num_rsp = atoi(optarg);
			break;

		case 'f':
			flags |= IREQ_CACHE_FLUSH;
			break;

		default:
			printf(scan_help);
			return;
		}
	}

	if (dev_id < 0) {
		dev_id = hci_get_route(NULL);
		if (dev_id < 0) {
			perror("Device is not available");
			exit(1);
		}
	}

	printf("Scanning ...\n");
	num_rsp = hci_inquiry(dev_id, length, num_rsp, NULL, &info, flags);
	if (num_rsp < 0) {
		perror("Inquiry failed");
		exit(1);
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		free(info);
		exit(1);
	}

	for (i = 0; i < num_rsp; i++) {
		memset(name, 0, sizeof(name));
		if (hci_read_remote_name(dd, &(info+i)->bdaddr, sizeof(name), name, 100000) < 0)
			strcpy(name, "n/a");
		ba2str(&(info+i)->bdaddr, addr);
		printf("\t%s\t%s\n", addr, name);
	}

	close(dd);
	free(info);
}

/* Remote name */

static struct option name_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *name_help =
	"Usage:\n"
	"\tname <bdaddr>\n";

static void cmd_name(int dev_id, int argc, char **argv)
{
	bdaddr_t bdaddr;
	char name[248];
	int opt, dd;

	for_each_opt(opt, name_options, NULL) {
		switch (opt) {
		default:
			printf(name_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(name_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_get_route(&bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Device is not available.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	if (hci_read_remote_name(dd, &bdaddr, sizeof(name), name, 25000) == 0)
		printf("%s\n", name);

	close(dd);
}

/* Info about remote device */

static struct option info_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *info_help = 
	"Usage:\n"
	"\tinfo <bdaddr>\n";

static void cmd_info(int dev_id, int argc, char **argv)
{
	bdaddr_t bdaddr;
	uint16_t handle;
	char name[248];
	unsigned char features[8];
	struct hci_version version;
	struct hci_dev_info di;
	struct hci_conn_info_req *cr;
	int opt, dd, cc = 0;

	for_each_opt(opt, info_options, NULL) {
		switch (opt) {
		default:
			printf(info_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(info_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0)
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);

	if (dev_id < 0)
		dev_id = hci_get_route(&bdaddr);

	if (dev_id < 0) {
		fprintf(stderr, "Device is not available or not connected.\n");
		exit(1);
	}

	if (hci_devinfo(dev_id, &di) < 0) {
		perror("Can't get device info");
		exit(1);
	}

	printf("Requesting information ...\n");

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr) {
		perror("Can't get connection info");
		close(dd);
		exit(1);
	}

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		if (hci_create_connection(dd, &bdaddr,
					htobs(di.pkt_type & ACL_PTYPE_MASK),
					0, 0x01, &handle, 25000) < 0) {
			perror("Can't create connection");
			close(dd);
			exit(1);
		}
		cc = 1;
	} else
		handle = htobs(cr->conn_info->handle);

	printf("\tBD Address:  %s\n", argv[0]);

	if (hci_read_remote_name(dd, &bdaddr, sizeof(name), name, 25000) == 0)
		printf("\tDevice Name: %s\n", name);

	if (hci_read_remote_version(dd, handle, &version, 20000) == 0) {
		printf("\tLMP Version: %s (0x%x) LMP Subversion: 0x%x\n"
			"\tManufacturer: %s (%d)\n",
			lmp_vertostr(version.lmp_ver),
			version.lmp_ver,
			version.lmp_subver,
			bt_compidtostr(version.manufacturer),
			version.manufacturer);
	}

	if (hci_read_remote_features(dd, handle, features, 20000) == 0) {
		printf("\tFeatures: 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x 0x%2.2x\n%s\n",
			features[0], features[1], features[2], features[3],
			features[4], features[5], features[6], features[7],
			lmp_featurestostr(features, "\t\t", 63));
	}

	if (cc) {
		usleep(10000);
		hci_disconnect(dd, handle, HCI_OE_USER_ENDED_CONNECTION, 10000);
	}

	close(dd);
}

/* Send arbitrary HCI commands */

static struct option cmd_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *cmd_help = 
	"Usage:\n"
	"\tcmd <ogf> <ocf> [parameters]\n"
	"Example:\n"
	"\tcmd 0x03 0x0013 0x41 0x42 0x43 0x44\n";

static void cmd_cmd(int dev_id, int argc, char **argv)
{
	char buf[HCI_MAX_EVENT_SIZE], *ptr = buf;
	struct hci_filter flt;
	hci_event_hdr *hdr;
	int i, opt, len, dd;
	uint16_t ocf;
	uint8_t ogf;

	for_each_opt(opt, cmd_options, NULL) {
		switch (opt) {
		default:
			printf(cmd_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 2) {
		printf(cmd_help);
		return;
	}

	if (dev_id < 0)
		dev_id = hci_get_route(NULL);

	errno = 0;
	ogf = strtol(argv[0], NULL, 16);
	ocf = strtol(argv[1], NULL, 16);
	if (errno == ERANGE || (ogf > 0x3f) || (ocf > 0x3ff)) {
		printf(cmd_help);
		return;
	}

	for (i = 2, len = 0; i < argc && len < sizeof(buf); i++, len++)
		*ptr++ = (uint8_t) strtol(argv[i], NULL, 16);

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("Device open failed");
		exit(EXIT_FAILURE);
	}

	/* Setup filter */
	hci_filter_clear(&flt);
	hci_filter_set_ptype(HCI_EVENT_PKT, &flt);
	hci_filter_all_events(&flt);
	if (setsockopt(dd, SOL_HCI, HCI_FILTER, &flt, sizeof(flt)) < 0) {
		perror("HCI filter setup failed");
		exit(EXIT_FAILURE);
	}

	printf("< HCI Command: ogf 0x%02x, ocf 0x%04x, plen %d\n", ogf, ocf, len);
	hex_dump("  ", 20, buf, len); fflush(stdout);

	if (hci_send_cmd(dd, ogf, ocf, len, buf) < 0) {
		perror("Send failed");
		exit(EXIT_FAILURE);
	}

	len = read(dd, buf, sizeof(buf));
	if (len < 0) {
		perror("Read failed");
		exit(EXIT_FAILURE);
	}

	hdr = (void *)(buf + 1);
	ptr = buf + (1 + HCI_EVENT_HDR_SIZE);
	len -= (1 + HCI_EVENT_HDR_SIZE);

	printf("> HCI Event: 0x%02x plen %d\n", hdr->evt, hdr->plen);
	hex_dump("  ", 20, ptr, len); fflush(stdout);

	hci_close_dev(dd);
}

/* Display active connections */

static struct option con_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *con_help = 
	"Usage:\n"
	"\tcon\n";

static void cmd_con(int dev_id, int argc, char **argv)
{
	int opt;

	for_each_opt(opt, con_options, NULL) {
		switch (opt) {
		default:
			printf(con_help);
			return;
		}
	}

	printf("Connections:\n");
	hci_for_each_dev(HCI_UP, conn_list, dev_id);
}

/* Create connection */

static struct option cc_options[] = {
	{"help",	0,0, 'h'},
	{"role",	1,0, 'r'},
	{"ptype",	1,0, 'p'},
	{0, 0, 0, 0}
};

static char *cc_help = 
	"Usage:\n"
	"\tcc [--role=m|s] [--ptype=pkt_types] <bdaddr>\n"
	"Example:\n"
	"\tcc --ptype=dm1,dh3,dh5 01:02:03:04:05:06\n"
	"\tcc --role=m 01:02:03:04:05:06\n";

static void cmd_cc(int dev_id, int argc, char **argv)
{
	bdaddr_t bdaddr;
	int opt, ptype, dd;
	uint16_t handle;
	uint8_t role;

	role = 0x01;
	ptype = HCI_DM1 | HCI_DM3 | HCI_DM5 | HCI_DH1 | HCI_DH3 | HCI_DH5;

	for_each_opt(opt, cc_options, NULL) {
		switch (opt) {
		case 'p':
			hci_strtoptype(optarg, &ptype);
			break;

		case 'r':
			role = optarg[0] == 'm' ? 0 : 1;
			break;

		default:
			printf(cc_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(cc_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_get_route(&bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Device is not available.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	if (hci_create_connection(dd, &bdaddr, htobs(ptype),
					0, role, &handle, 25000) < 0)
		perror("Can't create connection");
	hci_close_dev(dd);
}

/* Close connection */

static struct option dc_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *dc_help = 
	"Usage:\n"
	"\tdc <bdaddr>\n";

static void cmd_dc(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	bdaddr_t bdaddr;
	int opt, dd;

	for_each_opt(opt, dc_options, NULL) {
		switch (opt) {
		default:
			printf(dc_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(dc_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	if (hci_disconnect(dd, htobs(cr->conn_info->handle),
				HCI_OE_USER_ENDED_CONNECTION, 10000) < 0)
		perror("Disconnect failed");

	close(dd);
	free(cr);
}

/* Role switch */

static struct option sr_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *sr_help = 
	"Usage:\n"
	"\tsr <bdaddr> <role>\n";

static void cmd_sr(int dev_id, int argc, char **argv)
{
	bdaddr_t bdaddr;
	uint8_t role;
	int opt, dd;

	for_each_opt(opt, sr_options, NULL) {
		switch (opt) {
		default:
			printf(sr_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 2) {
		printf(sr_help);
		return;
	}

	str2ba(argv[0], &bdaddr);
	switch (argv[1][0]) {
	case 'm':
		role = 0;
		break;
	case 's':
		role = 1;
		break;
	default:
		role = atoi(argv[1]);
		break;
	}

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	if (hci_switch_role(dd, &bdaddr, role, 10000) < 0) {
		perror("Switch role request failed");
		exit(1);
	}

	close(dd);
}

/* Read RSSI */

static struct option rssi_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *rssi_help = 
	"Usage:\n"
	"\trssi <bdaddr>\n";

static void cmd_rssi(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	struct hci_request rq;
	read_rssi_rp rp;
	bdaddr_t bdaddr;
	uint16_t handle;
	int opt, dd;

	for_each_opt(opt, rssi_options, NULL) {
		switch (opt) {
		default:
			printf(rssi_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(rssi_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	handle = htobs(cr->conn_info->handle);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_STATUS_PARAM;
	rq.ocf    = OCF_READ_RSSI;
	rq.cparam = &handle;
	rq.clen   = 2;
	rq.rparam = &rp;
	rq.rlen   = READ_RSSI_RP_SIZE;

	if (hci_send_req(dd, &rq, 100) < 0) {
		perror("Read RSSI failed");
		exit(1);
	}

	if (rp.status) {
		printf("Read RSSI returned (error) status 0x%2.2X\n",
				rp.status);
		exit(1);
	}
	printf("RSSI return value: %d\n", rp.rssi);

	close(dd);
	free(cr);
}

/* Get link quality */

static struct option lq_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *lq_help = 
	"Usage:\n"
	"\tlq <bdaddr>\n";

static void cmd_lq(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	struct hci_request rq;
	get_link_quality_rp rp;
	bdaddr_t bdaddr;
	uint16_t handle;
	int opt, dd;

	for_each_opt(opt, lq_options, NULL) {
		switch (opt) {
		default:
			printf(lq_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(lq_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	handle = htobs(cr->conn_info->handle);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_STATUS_PARAM;
	rq.ocf    = OCF_GET_LINK_QUALITY;
	rq.cparam = &handle;
	rq.clen   = 2;
	rq.rparam = &rp;
	rq.rlen   = GET_LINK_QUALITY_RP_SIZE;

	if (hci_send_req(dd, &rq, 100) < 0) {
		perror("HCI get_link_quality request failed");
		exit(1);
	}

	if (rp.status) {
		fprintf(stderr, "HCI get_link_quality cmd failed (0x%2.2X)\n",
				rp.status);
		exit(1);
	}
	printf("Link quality: %d\n", rp.link_quality);

	close(dd);
	free(cr);
}

/* Get transmit power level */

static struct option tpl_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *tpl_help = 
	"Usage:\n"
	"\ttpl <bdaddr> [type]\n";

static void cmd_tpl(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	struct hci_request rq;
	read_transmit_power_level_cp cp;
	read_transmit_power_level_rp rp;
	bdaddr_t bdaddr;
	int opt, dd;

	for_each_opt(opt, tpl_options, NULL) {
		switch (opt) {
		default:
			printf(tpl_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(tpl_help);
		return;
	}

	str2ba(argv[0], &bdaddr);
	cp.type = (argc > 1) ? atoi(argv[1]) : 0;

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}
	cp.handle = htobs(cr->conn_info->handle);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_HOST_CTL;
	rq.ocf    = OCF_READ_TRANSMIT_POWER_LEVEL;
	rq.cparam = &cp;
	rq.clen   = READ_TRANSMIT_POWER_LEVEL_CP_SIZE;
	rq.rparam = &rp;
	rq.rlen   = READ_TRANSMIT_POWER_LEVEL_RP_SIZE;

	if (hci_send_req(dd, &rq, 100) < 0) {
		perror("HCI read transmit power level request failed");
		exit(1);
	}

	if (rp.status) {
		fprintf(stderr, "HCI read_transmit_power_level cmd failed (0x%2.2X)\n", 
				rp.status);
		exit(1);
	}
	printf("%s transmit power level: %d\n",
		(cp.type == 0) ? "Current" : "Maximum", rp.level);

	close(dd);
	free(cr);
}

/* Get AFH channel map */

static struct option afh_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *afh_help = 
	"Usage:\n"
	"\tafh <bdaddr>\n";

static void cmd_afh(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	bdaddr_t bdaddr;
	uint16_t handle;
	uint8_t mode, map[10];
	int opt, dd;

	for_each_opt(opt, afh_options, NULL) {
		switch (opt) {
		default:
			printf(afh_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(afh_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	handle = htobs(cr->conn_info->handle);

	if (hci_read_afh_map(dd, handle, &mode, map, 1000) < 0) {
		perror("HCI read AFH map request failed");
		exit(1);
	}

	if (mode == 0x01) {
		int i;
		printf("AFH map: 0x");
		for (i = 0; i < 10; i++)
			printf("%02x", map[i]);
		printf("\n");
	} else
		printf("AFH disabled\n");

	close(dd);
	free(cr);
}

/* Set connection packet type */

static struct option cpt_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *cpt_help = 
	"Usage:\n"
	"\tcpt <bdaddr> <packet_types>\n";

static void cmd_cpt(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	struct hci_request rq;
	set_conn_ptype_cp cp;
	evt_conn_ptype_changed rp;
	bdaddr_t bdaddr;
	int opt, dd, ptype;

	for_each_opt(opt, cpt_options, NULL) {
		switch (opt) {
		default:
			printf(cpt_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 2) {
		printf(cpt_help);
		return;
	}

	str2ba(argv[0], &bdaddr);
	hci_strtoptype(argv[1], &ptype);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	cp.handle   = htobs(cr->conn_info->handle);
	cp.pkt_type = ptype;

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_LINK_CTL;
	rq.ocf    = OCF_SET_CONN_PTYPE;
	rq.cparam = &cp;
	rq.clen   = SET_CONN_PTYPE_CP_SIZE;
	rq.rparam = &rp;
	rq.rlen   = EVT_CONN_PTYPE_CHANGED_SIZE;
	rq.event  = EVT_CONN_PTYPE_CHANGED;

	if (hci_send_req(dd, &rq, 100) < 0) {
		perror("Packet type change failed");
		exit(1);
	}

	close(dd);
	free(cr);
}

/* Get/Set link supervision timeout */

static struct option lst_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *lst_help = 
	"Usage:\n"
	"\tlst <bdaddr> [new value in slots]\n";

static void cmd_lst(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	struct hci_request rq;
	read_link_supervision_timeout_rp rp;
	write_link_supervision_timeout_cp cp;
	bdaddr_t bdaddr;
	uint16_t handle;
	int opt, dd;

	for_each_opt(opt, lst_options, NULL) {
		switch (opt) {
		default:
			printf(lst_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(lst_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	handle = htobs(cr->conn_info->handle);

	if (argc == 1) {
		memset(&rq, 0, sizeof(rq));
		rq.ogf    = OGF_HOST_CTL;
		rq.ocf    = OCF_READ_LINK_SUPERVISION_TIMEOUT;
		rq.cparam = &handle;
		rq.clen   = 2;
		rq.rparam = &rp;
		rq.rlen   = READ_LINK_SUPERVISION_TIMEOUT_RP_SIZE;

		if (hci_send_req(dd, &rq, 100) < 0) {
			perror("HCI read_link_supervision_timeout request failed");
			exit(1);
		}

		if (rp.status) {
			fprintf(stderr, "HCI read_link_supervision_timeout failed (0x%2.2X)\n", 
				rp.status);
			exit(1);
		}
		if (rp.link_sup_to)
			printf("Link supervision timeout: %u slots (%.2f msec)\n",
				rp.link_sup_to, (float)rp.link_sup_to * 0.625);
		else
			printf("Link supervision timeout never expires\n");
	} else {
		cp.handle      = htobs(cr->conn_info->handle);
		cp.link_sup_to = strtol(argv[1], NULL, 10);

		memset(&rq, 0, sizeof(rq));
		rq.ogf    = OGF_HOST_CTL;
		rq.ocf    = OCF_WRITE_LINK_SUPERVISION_TIMEOUT;
		rq.cparam = &cp;
		rq.clen   = WRITE_LINK_SUPERVISION_TIMEOUT_CP_SIZE;

		if (hci_send_req(dd, &rq, 100) < 0) {
			perror("HCI write_link_supervision_timeout request failed");
			exit(1);
		}
	}

	close(dd);
	free(cr);
}

/* Request authentication */

static struct option auth_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *auth_help = 
	"Usage:\n"
	"\tauth <bdaddr>\n";

static void cmd_auth(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	bdaddr_t bdaddr;
	int opt, dd;

	for_each_opt(opt, auth_options, NULL) {
		switch (opt) {
		default:
			printf(auth_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(auth_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	if (hci_authenticate_link(dd, htobs(cr->conn_info->handle), 25000) < 0) {
		perror("HCI authentication request failed");
		exit(1);
	}

	close(dd);
	free(cr);
}

/* Activate encryption */

static struct option enc_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *enc_help = 
	"Usage:\n"
	"\tenc <bdaddr> [encrypt enable]\n";

static void cmd_enc(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	bdaddr_t bdaddr;
	uint8_t encrypt;
	int opt, dd;

	for_each_opt(opt, enc_options, NULL) {
		switch (opt) {
		default:
			printf(enc_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(enc_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	encrypt = (argc > 1) ? atoi(argv[1]) : 1;

	if (hci_encrypt_link(dd, htobs(cr->conn_info->handle), encrypt, 25000) < 0) {
		perror("HCI set encryption request failed");
		exit(1);
	}

	close(dd);
	free(cr);
}

/* Change connection link key */

static struct option key_options[] = {
	{"help",	0,0, 'h'},
	{0, 0, 0, 0}
};

static char *key_help = 
	"Usage:\n"
	"\tkey <bdaddr>\n";

static void cmd_key(int dev_id, int argc, char **argv)
{
	struct hci_conn_info_req *cr;
	bdaddr_t bdaddr;
	int opt, dd;

	for_each_opt(opt, key_options, NULL) {
		switch (opt) {
		default:
			printf(key_help);
			return;
		}
	}
	argc -= optind;
	argv += optind;

	if (argc < 1) {
		printf(key_help);
		return;
	}

	str2ba(argv[0], &bdaddr);

	if (dev_id < 0) {
		dev_id = hci_for_each_dev(HCI_UP, find_conn, (long) &bdaddr);
		if (dev_id < 0) {
			fprintf(stderr, "Not connected.\n");
			exit(1);
		}
	}

	dd = hci_open_dev(dev_id);
	if (dd < 0) {
		perror("HCI device open failed");
		exit(1);
	}

	cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
	if (!cr)
		return;

	bacpy(&cr->bdaddr, &bdaddr);
	cr->type = ACL_LINK;
	if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0) {
		perror("Get connection info failed");
		exit(1);
	}

	if (hci_change_link_key(dd, htobs(cr->conn_info->handle), 25000) < 0) {
		perror("Changing link key failed");
		exit(1);
	}

	close(dd);
	free(cr);
}

static struct {
	char *cmd;
	void (*func)(int dev_id, int argc, char **argv);
	char *doc;
} command[] = {
	{ "dev",  cmd_dev,  "Display local devices"                },
	{ "inq",  cmd_inq,  "Inquire remote devices"               },
	{ "scan", cmd_scan, "Scan for remote devices"              },
	{ "name", cmd_name, "Get name from remote device"          },
	{ "info", cmd_info, "Get information from remote device"   },
	{ "cmd",  cmd_cmd,  "Submit arbitrary HCI commands"        },
	{ "con",  cmd_con,  "Display active connections"           },
	{ "cc",   cmd_cc,   "Create connection to remote device"   },
	{ "dc",   cmd_dc,   "Disconnect from remote device"        },
	{ "sr",   cmd_sr,   "Switch master/slave role"             },
	{ "cpt",  cmd_cpt,  "Change connection packet type"        },
	{ "rssi", cmd_rssi, "Display connection RSSI"              },
	{ "lq",   cmd_lq,   "Display link quality"                 },
	{ "tpl",  cmd_tpl,  "Display transmit power level"         },
	{ "afh",  cmd_afh,  "Display AFH channel map"              },
	{ "lst",  cmd_lst,  "Set/display link supervision timeout" },
	{ "auth", cmd_auth, "Request authentication"               },
	{ "enc",  cmd_enc,  "Set connection encryption"            },
	{ "key",  cmd_key,  "Change connection link key"           },
	{ NULL, NULL, 0 }
};

static void usage(void)
{
	int i;

	printf("hcitool - HCI Tool ver %s\n", VERSION);
	printf("Usage:\n"
		"\thcitool [options] <command> [command parameters]\n");
	printf("Options:\n"
		"\t--help\tDisplay help\n"
		"\t-i dev\tHCI device\n");
	printf("Commands:\n");
	for (i = 0; command[i].cmd; i++)
		printf("\t%-4s\t%s\n", command[i].cmd,
		command[i].doc);
	printf("\n"
		"For more information on the usage of each command use:\n"
		"\thcitool <command> --help\n" );
}

static struct option main_options[] = {
	{"help",	0,0, 'h'},
	{"device",	1,0, 'i'},
	{0, 0, 0, 0}
};

int main(int argc, char **argv)
{
	int opt, i, dev_id = -1;
	bdaddr_t ba;

	while ((opt=getopt_long(argc, argv, "+i:h", main_options, NULL)) != -1) {
		switch (opt) {
		case 'i':
			dev_id = hci_devid(optarg);
			if (dev_id < 0) {
				perror("Invalid device");
				exit(1);
			}
			break;

		case 'h':
		default:
			usage();
			exit(0);
		}
	}

	argc -= optind;
	argv += optind;
	optind = 0;

	if (argc < 1) {
		usage();
		exit(0);
	}

	if (dev_id != -1 && hci_devba(dev_id, &ba) < 0) {
		perror("Device is not available");
		exit(1);
	}

	for (i = 0; command[i].cmd; i++) {
		if (strncmp(command[i].cmd, argv[0], 3))
			continue;
		command[i].func(dev_id, argc, argv);
		break;
	}
	return 0;
}