hcid/storage.c

/*
 *
 *  BlueZ - Bluetooth protocol stack for Linux
 *
 *  Copyright (C) 2000-2001  Qualcomm Incorporated
 *  Copyright (C) 2002-2003  Maxim Krasnyansky <maxk@qualcomm.com>
 *  Copyright (C) 2002-2005  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 <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <malloc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/socket.h>

#include <bluetooth/bluetooth.h>

#include "textfile.h"
#include "hcid.h"

static int create_dirs(char *filename, mode_t mode)
{
	struct stat st;
	char dir[PATH_MAX + 1], *prev, *next;
	int err;

	err = stat(filename, &st);
	if (!err && S_ISREG(st.st_mode))
		return 0;

	memset(dir, 0, PATH_MAX + 1);
	strcat(dir, "/");

	prev = strchr(filename, '/');

	while (prev) {
		next = strchr(prev + 1, '/');
		if (!next)
			break;

		if (next - prev == 1) {
			prev = next;
			continue;
		}

		strncat(dir, prev + 1, next - prev);
		mkdir(dir, mode);

		prev = next;
	}

	return 0;
}

static inline int create_file(char *filename, mode_t mode)
{
	int fd;

	umask(S_IWGRP | S_IWOTH);
	create_dirs(filename, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);

	fd = open(filename, O_RDWR | O_CREAT, mode);
	if (fd < 0)
		return fd;

	close(fd);

	return 0;
}

int write_device_name(bdaddr_t *local, bdaddr_t *peer, char *name)
{
	char filename[PATH_MAX + 1], addr[18], str[249];
	int i;

	memset(str, 0, sizeof(str));
	for (i = 0; i < 248 && name[i]; i++)
		if (isprint(name[i]))
			str[i] = name[i];
		else
			str[i] = '.';

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/names", STORAGEDIR, addr);

	create_file(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

	ba2str(peer, addr);
	return textfile_put(filename, addr, str);
}

int read_device_name(bdaddr_t *local, bdaddr_t *peer, char *name)
{
	char filename[PATH_MAX + 1], addr[18], *str;
	int len;

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/names", STORAGEDIR, addr);

	ba2str(peer, addr);
	str = textfile_get(filename, addr);
	if (!str)
		return -ENOENT;

	len = strlen(str);
	if (len > 248)
		str[248] = '\0';
	strcpy(name, str);

	return 0;
}

int write_version_info(bdaddr_t *local, bdaddr_t *peer, uint16_t manufacturer, uint8_t lmp_ver, uint16_t lmp_subver)
{
	char filename[PATH_MAX + 1], addr[18], str[16];

	memset(str, 0, sizeof(str));
	sprintf(str, "%d %d %d", manufacturer, lmp_ver, lmp_subver);

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/manufacturers", STORAGEDIR, addr);

	create_file(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

	ba2str(peer, addr);
	return textfile_put(filename, addr, str);
}

int write_features_info(bdaddr_t *local, bdaddr_t *peer, unsigned char *features)
{
	char filename[PATH_MAX + 1], addr[18], str[17];
	int i;

	memset(str, 0, sizeof(str));
	for (i = 0; i < 8; i++)
		sprintf(str + (i * 2), "%2.2X", features[i]);

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/features", STORAGEDIR, addr);

	create_file(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);

	ba2str(peer, addr);
	return textfile_put(filename, addr, str);
}

int write_link_key(bdaddr_t *local, bdaddr_t *peer, unsigned char *key, int type)
{
	char filename[PATH_MAX + 1], addr[18], str[35];
	int i;

	memset(str, 0, sizeof(str));
	for (i = 0; i < 16; i++)
		sprintf(str + (i * 2), "%2.2X", key[i]);
	sprintf(str + 32, " %d", type);

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/linkkeys", STORAGEDIR, addr);

	create_file(filename, S_IRUSR | S_IWUSR);

	ba2str(peer, addr);
	return textfile_put(filename, addr, str);
}

int read_link_key(bdaddr_t *local, bdaddr_t *peer, unsigned char *key)
{
	char filename[PATH_MAX + 1], addr[18], tmp[3], *str;
	int i;

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/linkkeys", STORAGEDIR, addr);

	ba2str(peer, addr);
	str = textfile_get(filename, addr);
	if (!str)
		return -ENOENT;

	memset(tmp, 0, sizeof(tmp));
	for (i = 0; i < 16; i++) {
		memcpy(tmp, str + (i * 2), 2);
		key[i] = (uint8_t) strtol(tmp, NULL, 16);
	}

	return 0;
}

int read_pin_code(bdaddr_t *local, bdaddr_t *peer, char *pin)
{
	char filename[PATH_MAX + 1], addr[18], *str;
	int len;

	ba2str(local, addr);
	snprintf(filename, PATH_MAX, "%s/%s/pincodes", STORAGEDIR, addr);

	ba2str(peer, addr);
	str = textfile_get(filename, addr);
	if (!str)
		return -ENOENT;

	strncpy(pin, str, 16);
	len = strlen(pin);

	return len;
}