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/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2007 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 as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <malloc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hidp.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
#include "textfile.h"
#include "logging.h"
#include "storage.h"
static inline int create_filename(char *buf, size_t size,
bdaddr_t *bdaddr, const char *name)
{
char addr[18];
ba2str(bdaddr, addr);
return create_name(buf, size, STORAGEDIR, addr, name);
}
int parse_stored_device_info(const char *str, struct hidp_connadd_req *req)
{
char tmp[3], *desc;
unsigned int vendor, product, version, subclass, country, parser, pos;
int i;
desc = malloc(4096);
if (!desc)
return -ENOMEM;
memset(desc, 0, 4096);
sscanf(str, "%04X:%04X:%04X %02X %02X %04X %4095s %08X %n",
&vendor, &product, &version, &subclass, &country,
&parser, desc, &req->flags, &pos);
req->vendor = vendor;
req->product = product;
req->version = version;
req->subclass = subclass;
req->country = country;
req->parser = parser;
snprintf(req->name, 128, str + pos);
req->rd_size = strlen(desc) / 2;
req->rd_data = malloc(req->rd_size);
if (!req->rd_data) {
free(desc);
return -ENOMEM;
}
memset(tmp, 0, sizeof(tmp));
for (i = 0; i < req->rd_size; i++) {
memcpy(tmp, desc + (i * 2), 2);
req->rd_data[i] = (uint8_t) strtol(tmp, NULL, 16);
}
free(desc);
return 0;
}
int get_stored_device_info(bdaddr_t *src, bdaddr_t *dst,
struct hidp_connadd_req *req)
{
char filename[PATH_MAX + 1], *str;
char peer[18];
int err;
create_filename(filename, PATH_MAX, src, "hidd");
ba2str(dst, peer);
str = textfile_get(filename, peer);
if (!str)
return -ENOENT;
err = parse_stored_device_info(str, req);
free(str);
return err;
}
int del_stored_device_info(bdaddr_t *src, bdaddr_t *dst)
{
char filename[PATH_MAX + 1];
char addr[18];
create_filename(filename, PATH_MAX, src, "hidd");
ba2str(dst, addr);
return textfile_del(filename, addr);
}
int store_device_info(bdaddr_t *src, bdaddr_t *dst, struct hidp_connadd_req *req)
{
char filename[PATH_MAX + 1], *str, *desc;
int i, err, size;
char addr[18];
create_filename(filename, PATH_MAX, src, "hidd");
size = 15 + 3 + 3 + 5 + (req->rd_size * 2) + 1 + 9 + strlen(req->name) + 2;
str = malloc(size);
if (!str)
return -ENOMEM;
desc = malloc((req->rd_size * 2) + 1);
if (!desc) {
free(str);
return -ENOMEM;
}
memset(desc, 0, (req->rd_size * 2) + 1);
for (i = 0; i < req->rd_size; i++)
sprintf(desc + (i * 2), "%2.2X", req->rd_data[i]);
snprintf(str, size - 1, "%04X:%04X:%04X %02X %02X %04X %s %08X %s",
req->vendor, req->product, req->version,
req->subclass, req->country, req->parser, desc,
req->flags, req->name);
free(desc);
create_file(filename, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
ba2str(dst, addr);
err = textfile_put(filename, addr, str);
free(str);
return err;
}
int encrypt_link(bdaddr_t *src, bdaddr_t *dst)
{
char filename[PATH_MAX + 1];
struct hci_conn_info_req *cr;
int dd, err, dev_id;
char addr[18], *str;
create_filename(filename, PATH_MAX, src, "linkkeys");
ba2str(dst, addr);
str = textfile_get(filename, addr);
if (!str) {
error("Encryption link key not found");
return -ENOKEY;
}
free(str);
cr = malloc(sizeof(*cr) + sizeof(struct hci_conn_info));
if (!cr)
return -ENOMEM;
ba2str(src, addr);
dev_id = hci_devid(addr);
if (dev_id < 0) {
free(cr);
return -errno;
}
dd = hci_open_dev(dev_id);
if (dd < 0) {
free(cr);
return -errno;
}
memset(cr, 0, sizeof(*cr) + sizeof(struct hci_conn_info));
bacpy(&cr->bdaddr, dst);
cr->type = ACL_LINK;
if (ioctl(dd, HCIGETCONNINFO, (unsigned long) cr) < 0)
goto fail;
if (hci_authenticate_link(dd, htobs(cr->conn_info->handle), 1000) < 0) {
error("Link authentication failed: %s (%d)",
strerror(errno), errno);
goto fail;
}
if (hci_encrypt_link(dd, htobs(cr->conn_info->handle), 1, 1000) < 0) {
error("Link encryption failed: %s (%d)",
strerror(errno), errno);
goto fail;
}
free(cr);
hci_close_dev(dd);
return 0;
fail:
free(cr);
err = errno;
hci_close_dev(dd);
return -err;
}
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