UWfirmforce
/* $Id: trx.c,v 1.1 2009/02/21 21:25:20 khorben Exp $ */
/* Copyright (c) 2007 khorben of Uberwall */
/* 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 version 2 of the License.
*
* 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 */
#include <stdint.h>
#include "plugin.h"
/* trx */
/* public */
/* types */
#pragma pack(1)
struct trx
{
uint32_t magic;
uint32_t len;
uint32_t crc;
uint16_t flags; /* FIXME not sure about flags|version */
uint16_t version;
uint32_t offset[3];
};
#pragma pack()
/* constants */
#define TRX_MAGIC 0x30524448
/* variables */
/* magic */
static unsigned char sig1[] = "HDR0";
static unsigned char sig2[] = "0RDH";
static PluginMagic trx_magic[] =
{
{ 0, 0, sig1, sizeof(sig1)-1 },
{ 0, 0, sig2, sizeof(sig2)-1 },
{ 0, 0, NULL, 0 }
};
/* functions */
static int trx_callback(PluginHelper * ph, int signature, FILE * fp);
/* plugin */
Plugin plugin =
{
PT_ARCHIVE,
"TRX",
trx_magic,
trx_callback
};
/* private */
/* functions */
/* trx_callback */
static void _callback_endian_little(struct trx * hdr);
static void _callback_endian_big(struct trx * hdr);
static int trx_callback(PluginHelper * ph, int signature, FILE * fp)
{
int score = 100;
struct trx buf;
ph->printf(ph, "%s, ", signature == 0 ? "big endian" : "little endian");
if(fread(&buf, sizeof(buf), 1, fp) != 1)
return -1;
if(buf.magic != TRX_MAGIC)
{
if(htol32(buf.magic) == TRX_MAGIC)
_callback_endian_little(&buf);
else if(htob32(buf.magic) == TRX_MAGIC)
_callback_endian_big(&buf);
else
score = 0;
}
if(buf.version == 1)
score += 100;
ph->printf(ph, "%s%u%s%u%s%u%s%08x%s%08x%s%08x\n", "length ",
buf.len, ", flags ", buf.flags, ", version ",
buf.version, ", offset #0 0x", buf.offset[0],
", offset #1 0x", buf.offset[1], ", offset #2 0x",
buf.offset[2]); /* FIXME check offsets */
return score / 2;
}
static void _callback_endian_little(struct trx * hdr)
{
int i;
hdr->magic = htol32(hdr->magic);
hdr->len = htol32(hdr->len);
hdr->crc = htol32(hdr->crc);
hdr->flags = htol16(hdr->flags);
hdr->version = htol16(hdr->version);
for(i = 0; i < 3; i++)
hdr->offset[i] = htol32(hdr->offset[i]);
}
static void _callback_endian_big(struct trx * hdr)
{
int i;
hdr->magic = htob32(hdr->magic);
hdr->len = htob32(hdr->len);
hdr->crc = htob32(hdr->crc);
hdr->flags = htob16(hdr->flags);
hdr->version = htob16(hdr->version);
for(i = 0; i < 3; i++)
hdr->offset[i] = htob32(hdr->offset[i]);
}