// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2004-2010  Marcel Holtmann <marcel@holtmann.org>
 *
 *
 */

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

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <getopt.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>

#include "bluetooth/bluetooth.h"
#include "bluetooth/hci.h"
#include "bluetooth/hci_lib.h"

#include "src/oui.h"

static int transient = 0;

static int generic_reset_device(int dd)
{
	bdaddr_t bdaddr;
	int err;

	err = hci_send_cmd(dd, 0x03, 0x0003, 0, NULL);
	if (err < 0)
		return err;

	return hci_read_bd_addr(dd, &bdaddr, 10000);
}

#define OCF_ERICSSON_WRITE_BD_ADDR	0x000d
typedef struct {
	bdaddr_t	bdaddr;
} __attribute__ ((packed)) ericsson_write_bd_addr_cp;

static int ericsson_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	struct hci_request rq;
	ericsson_write_bd_addr_cp cp;

	memset(&cp, 0, sizeof(cp));
	bacpy(&cp.bdaddr, bdaddr);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = OCF_ERICSSON_WRITE_BD_ADDR;
	rq.cparam = &cp;
	rq.clen   = sizeof(cp);
	rq.rparam = NULL;
	rq.rlen   = 0;

	if (hci_send_req(dd, &rq, 1000) < 0)
		return -1;

	return 0;
}

#define OCF_ERICSSON_STORE_IN_FLASH	0x0022
typedef struct {
	uint8_t		user_id;
	uint8_t		flash_length;
	uint8_t		flash_data[253];
} __attribute__ ((packed)) ericsson_store_in_flash_cp;

static int ericsson_store_in_flash(int dd, uint8_t user_id, uint8_t flash_length, uint8_t *flash_data)
{
	struct hci_request rq;
	ericsson_store_in_flash_cp cp;

	memset(&cp, 0, sizeof(cp));
	cp.user_id = user_id;
	cp.flash_length = flash_length;
	if (flash_length > 0)
		memcpy(cp.flash_data, flash_data, flash_length);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = OCF_ERICSSON_STORE_IN_FLASH;
	rq.cparam = &cp;
	rq.clen   = sizeof(cp);
	rq.rparam = NULL;
	rq.rlen   = 0;

	if (hci_send_req(dd, &rq, 1000) < 0)
		return -1;

	return 0;
}

static int csr_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	unsigned char cmd[] = { 0x02, 0x00, 0x0c, 0x00, 0x11, 0x47, 0x03, 0x70,
				0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x00, 0x00,
				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

	unsigned char cp[254], rp[254];
	struct hci_request rq;

	if (transient)
		cmd[14] = 0x08;

	cmd[16] = bdaddr->b[2];
	cmd[17] = 0x00;
	cmd[18] = bdaddr->b[0];
	cmd[19] = bdaddr->b[1];
	cmd[20] = bdaddr->b[3];
	cmd[21] = 0x00;
	cmd[22] = bdaddr->b[4];
	cmd[23] = bdaddr->b[5];

	memset(&cp, 0, sizeof(cp));
	cp[0] = 0xc2;
	memcpy(cp + 1, cmd, sizeof(cmd));

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = 0x00;
	rq.event  = EVT_VENDOR;
	rq.cparam = cp;
	rq.clen   = sizeof(cmd) + 1;
	rq.rparam = rp;
	rq.rlen   = sizeof(rp);

	if (hci_send_req(dd, &rq, 2000) < 0)
		return -1;

	if (rp[0] != 0xc2) {
		errno = EIO;
		return -1;
	}

	if ((rp[9] + (rp[10] << 8)) != 0) {
		errno = ENXIO;
		return -1;
	}

	return 0;
}

static int csr_reset_device(int dd)
{
	unsigned char cmd[] = { 0x02, 0x00, 0x09, 0x00,
				0x00, 0x00, 0x01, 0x40, 0x00, 0x00,
				0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };

	unsigned char cp[254], rp[254];
	struct hci_request rq;

	if (transient)
		cmd[6] = 0x02;

	memset(&cp, 0, sizeof(cp));
	cp[0] = 0xc2;
	memcpy(cp + 1, cmd, sizeof(cmd));

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = 0x00;
	rq.event  = EVT_VENDOR;
	rq.cparam = cp;
	rq.clen   = sizeof(cmd) + 1;
	rq.rparam = rp;
	rq.rlen   = sizeof(rp);

	if (hci_send_req(dd, &rq, 2000) < 0)
		return -1;

	return 0;
}

#define OCF_TI_WRITE_BD_ADDR		0x0006
typedef struct {
	bdaddr_t	bdaddr;
} __attribute__ ((packed)) ti_write_bd_addr_cp;

static int ti_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	struct hci_request rq;
	ti_write_bd_addr_cp cp;

	memset(&cp, 0, sizeof(cp));
	bacpy(&cp.bdaddr, bdaddr);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = OCF_TI_WRITE_BD_ADDR;
	rq.cparam = &cp;
	rq.clen   = sizeof(cp);
	rq.rparam = NULL;
	rq.rlen   = 0;

	if (hci_send_req(dd, &rq, 1000) < 0)
		return -1;

	return 0;
}

#define OCF_BCM_WRITE_BD_ADDR		0x0001
typedef struct {
	bdaddr_t	bdaddr;
} __attribute__ ((packed)) bcm_write_bd_addr_cp;

static int bcm_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	struct hci_request rq;
	bcm_write_bd_addr_cp cp;

	memset(&cp, 0, sizeof(cp));
	bacpy(&cp.bdaddr, bdaddr);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = OCF_BCM_WRITE_BD_ADDR;
	rq.cparam = &cp;
	rq.clen   = sizeof(cp);
	rq.rparam = NULL;
	rq.rlen   = 0;

	if (hci_send_req(dd, &rq, 1000) < 0)
		return -1;

	return 0;
}

#define OCF_ZEEVO_WRITE_BD_ADDR		0x0001
typedef struct {
	bdaddr_t	bdaddr;
} __attribute__ ((packed)) zeevo_write_bd_addr_cp;

static int zeevo_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	struct hci_request rq;
	zeevo_write_bd_addr_cp cp;

	memset(&cp, 0, sizeof(cp));
	bacpy(&cp.bdaddr, bdaddr);

	memset(&rq, 0, sizeof(rq));
	rq.ogf    = OGF_VENDOR_CMD;
	rq.ocf    = OCF_ZEEVO_WRITE_BD_ADDR;
	rq.cparam = &cp;
	rq.clen   = sizeof(cp);
	rq.rparam = NULL;
	rq.rlen   = 0;

	if (hci_send_req(dd, &rq, 1000) < 0)
		return -1;

	return 0;
}

#define OCF_MRVL_WRITE_BD_ADDR		0x0022
typedef struct {
	uint8_t		parameter_id;
	uint8_t		bdaddr_len;
	bdaddr_t	bdaddr;
} __attribute__ ((packed)) mrvl_write_bd_addr_cp;

static int mrvl_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	mrvl_write_bd_addr_cp cp;

	memset(&cp, 0, sizeof(cp));
	cp.parameter_id = 0xFE;
	cp.bdaddr_len = 6;
	bacpy(&cp.bdaddr, bdaddr);

	if (hci_send_cmd(dd, OGF_VENDOR_CMD, OCF_MRVL_WRITE_BD_ADDR,
							sizeof(cp), &cp) < 0)
		return -1;

	sleep(1);
	return 0;
}

static int st_write_bd_addr(int dd, bdaddr_t *bdaddr)
{
	return ericsson_store_in_flash(dd, 0xfe, 6, (uint8_t *) bdaddr);
}

static struct {
	uint16_t compid;
	int (*write_bd_addr)(int dd, bdaddr_t *bdaddr);
	int (*reset_device)(int dd);
} vendor[] = {
	{ 0,		ericsson_write_bd_addr,	NULL			},
	{ 10,		csr_write_bd_addr,	csr_reset_device	},
	{ 13,		ti_write_bd_addr,	NULL			},
	{ 15,		bcm_write_bd_addr,	generic_reset_device	},
	{ 18,		zeevo_write_bd_addr,	NULL			},
	{ 48,		st_write_bd_addr,	generic_reset_device	},
	{ 57,		ericsson_write_bd_addr,	generic_reset_device	},
	{ 72,		mrvl_write_bd_addr,	generic_reset_device	},
	{ 305,		bcm_write_bd_addr,	generic_reset_device	},
	{ 65535,	NULL,			NULL			},
};

static void usage(void)
{
	printf("bdaddr - Utility for changing the Bluetooth device address\n\n");
	printf("Usage:\n"
		"\tbdaddr [-i <dev>] [-r] [-t] [new bdaddr]\n");
}

static struct option main_options[] = {
	{ "device",	1, 0, 'i' },
	{ "reset",	0, 0, 'r' },
	{ "transient",	0, 0, 't' },
	{ "help",	0, 0, 'h' },
	{ 0, 0, 0, 0 }
};

int main(int argc, char *argv[])
{
	struct hci_dev_info di;
	struct hci_version ver;
	bdaddr_t bdaddr;
	char addr[18], *comp;
	int i, dd, opt, dev = 0, reset = 0;

	bacpy(&bdaddr, BDADDR_ANY);

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

		case 'r':
			reset = 1;
			break;

		case 't':
			transient = 1;
			break;

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

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

	dd = hci_open_dev(dev);
	if (dd < 0) {
		fprintf(stderr, "Can't open device hci%d: %s (%d)\n",
						dev, strerror(errno), errno);
		exit(1);
	}

	if (hci_devinfo(dev, &di) < 0) {
		fprintf(stderr, "Can't get device info for hci%d: %s (%d)\n",
						dev, strerror(errno), errno);
		hci_close_dev(dd);
		exit(1);
	}

	if (hci_read_local_version(dd, &ver, 1000) < 0) {
		fprintf(stderr, "Can't read version info for hci%d: %s (%d)\n",
						dev, strerror(errno), errno);
		hci_close_dev(dd);
		exit(1);
	}

	if (!bacmp(&di.bdaddr, BDADDR_ANY)) {
		if (hci_read_bd_addr(dd, &bdaddr, 1000) < 0) {
			fprintf(stderr, "Can't read address for hci%d: %s (%d)\n",
						dev, strerror(errno), errno);
			hci_close_dev(dd);
			exit(1);
		}
	} else
		bacpy(&bdaddr, &di.bdaddr);

	printf("Manufacturer:   %s (%d)\n",
			bt_compidtostr(ver.manufacturer), ver.manufacturer);

	comp = batocomp(&bdaddr);

	ba2str(&bdaddr, addr);
	printf("Device address: %s", addr);

	if (comp) {
		printf(" (%s)\n", comp);
		free(comp);
	} else
		printf("\n");

	if (argc < 1) {
		hci_close_dev(dd);
		exit(0);
	}

	str2ba(argv[0], &bdaddr);
	if (!bacmp(&bdaddr, BDADDR_ANY)) {
		hci_close_dev(dd);
		exit(0);
	}

	for (i = 0; vendor[i].compid != 65535; i++)
		if (ver.manufacturer == vendor[i].compid) {
			comp = batocomp(&bdaddr);

			ba2str(&bdaddr, addr);
			printf("New BD address: %s", addr);

			if (comp) {
				printf(" (%s)\n\n", comp);
				free(comp);
			} else
				printf("\n\n");


			if (vendor[i].write_bd_addr(dd, &bdaddr) < 0) {
				fprintf(stderr, "Can't write new address\n");
				hci_close_dev(dd);
				exit(1);
			}

			printf("Address changed - ");

			if (reset && vendor[i].reset_device) {
				if (vendor[i].reset_device(dd) < 0) {
					printf("Reset device manually\n");
				} else {
					ioctl(dd, HCIDEVRESET, dev);
					printf("Device reset successfully\n");
				}
			} else {
				printf("Reset device now\n");
			}

			//ioctl(dd, HCIDEVRESET, dev);
			//ioctl(dd, HCIDEVDOWN, dev);
			//ioctl(dd, HCIDEVUP, dev);

			hci_close_dev(dd);
			exit(0);
		}

	hci_close_dev(dd);

	printf("\n");
	fprintf(stderr, "Unsupported manufacturer\n");

	exit(1);
}
