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/*
* Compaq Ownership Tag
*
* Copyright (C) 2003-2005 Jean Delvare <jdelvare@suse.de>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For the avoidance of doubt the "preferred form" of this code is one which
* is in an open unpatent encumbered format. Where cryptographic key signing
* forms part of the process of creating an executable the information
* including keys needed to generate an equivalently functional executable
* are deemed to be part of the source code.
*
* References:
* - Compaq "Technical Reference Guide for Compaq Deskpro 4000 and 6000"
* First Edition
* http://h18000.www1.hp.com/support/techpubs/technical_reference_guides/113a1097.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <getopt.h>
#include "version.h"
#include "config.h"
#include "types.h"
#include "util.h"
/* Options are global */
struct opt
{
const char *devmem;
unsigned int flags;
};
static struct opt opt;
#define FLAG_VERSION (1 << 0)
#define FLAG_HELP (1 << 1)
static void ownership(u32 base, const char *pname, const char *devmem)
{
u8 *buf;
int i;
/* read the ownership tag */
if ((buf = mem_chunk(base, 0x51, devmem)) == NULL)
{
perror(pname);
return;
}
/* chop the trailing garbage */
i = 0x4f;
while (i >= 0 && (buf[i] == 0x20 || buf[i] == 0x00))
i--;
buf[i + 1] = '\0';
/* filter and print */
if (i >= 0)
{
for (; i >= 0; i--)
{
if (buf[i] < 32 || (buf[i] >= 127 && buf[i] < 160))
buf[i] = '?';
}
printf("%s\n", (char *)buf);
}
free(buf);
}
static u32 decode(const u8 *p)
{
int i;
/* integrity checking (lack of checksum) */
for (i = 0; i < p[4]; i++)
{
if (p[5 + i * 10] != '$'
|| !(p[6 + i * 10] >= 'A' && p[6 + i * 10] <= 'Z')
|| !(p[7 + i * 10] >= 'A' && p[7 + i * 10] <= 'Z')
|| !(p[8 + i * 10] >= 'A' && p[8 + i * 10] <= 'Z'))
{
printf("\t Abnormal Entry! Please report. [%02x %02x %02x %02x]\n",
p[5 + i * 10], p[6 + i * 10],
p[7 + i * 10], p[8 + i * 10]);
return 0;
}
}
/* search for the right entry */
for (i = 0; i < p[4]; i++)
if (memcmp(p + 5 + i * 10, "$ERB", 4) == 0)
return DWORD(p + 9 + i * 10);
return 0;
}
/* Return -1 on error, 0 on success */
static int parse_command_line(int argc, char * const argv[])
{
int option;
const char *optstring = "d:hV";
struct option longopts[] = {
{ "dev-mem", required_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }
};
while ((option = getopt_long(argc, argv, optstring, longopts, NULL)) != -1)
switch (option)
{
case 'd':
opt.devmem = optarg;
break;
case 'h':
opt.flags |= FLAG_HELP;
break;
case 'V':
opt.flags |= FLAG_VERSION;
break;
case '?':
return -1;
}
return 0;
}
static void print_help(void)
{
static const char *help =
"Usage: ownership [OPTIONS]\n"
"Options are:\n"
" -d, --dev-mem FILE Read memory from device FILE (default: " DEFAULT_MEM_DEV ")\n"
" -h, --help Display this help text and exit\n"
" -V, --version Display the version and exit\n";
printf("%s", help);
}
int main(int argc, char * const argv[])
{
u8 *buf;
off_t fp;
int ok = 0;
if (sizeof(u8) != 1 || sizeof(u32) != 4)
{
fprintf(stderr, "%s: compiler incompatibility\n", argv[0]);
exit(255);
}
/* Set default option values */
opt.devmem = DEFAULT_MEM_DEV;
opt.flags = 0;
if (parse_command_line(argc, argv)<0)
exit(2);
if (opt.flags & FLAG_HELP)
{
print_help();
return 0;
}
if (opt.flags & FLAG_VERSION)
{
printf("%s\n", VERSION);
return 0;
}
if ((buf = mem_chunk(0xE0000, 0x20000, opt.devmem)) == NULL)
exit(1);
for (fp = 0; !ok && fp <= 0x1FFF0; fp += 16)
{
u8 *p = buf + fp;
if (memcmp((char *)p, "32OS", 4) == 0)
{
off_t len = p[4] * 10 + 5;
if (fp + len - 1 <= 0x1FFFF)
{
u32 base;
if ((base = decode(p)))
{
ok = 1;
ownership(base, argv[0], opt.devmem);
}
}
}
}
free(buf);
return 0;
}
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