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87a80acbe7
lz4/tests/checkFrame.c
Yann Collet 87a80acbe7 updated license & header dates
2020-11-25 14:45:14 -08:00

304 lines
10 KiB
C
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/*
checkFrame - verify frame headers
Copyright (C) Yann Collet 2014-2020
GPL v2 License
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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
You can contact the author at :
- LZ4 homepage : http://www.lz4.org
- LZ4 source repository : https://github.com/lz4/lz4
*/
/*-************************************
* Includes
**************************************/
#include "util.h" /* U32 */
#include <stdlib.h> /* malloc, free */
#include <stdio.h> /* fprintf */
#include <string.h> /* strcmp */
#include <time.h> /* clock_t, clock(), CLOCKS_PER_SEC */
#include <assert.h>
#include "lz4frame.h" /* include multiple times to test correctness/safety */
#include "lz4frame.h"
#define LZ4F_STATIC_LINKING_ONLY
#include "lz4frame.h"
#include "lz4frame.h"
#include "lz4.h" /* LZ4_VERSION_STRING */
#define XXH_STATIC_LINKING_ONLY
#include "xxhash.h" /* XXH64 */
/*-************************************
* Constants
**************************************/
#define KB *(1U<<10)
#define MB *(1U<<20)
#define GB *(1U<<30)
/*-************************************
* Macros
**************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (displayLevel>=l) { DISPLAY(__VA_ARGS__); }
/**************************************
* Exceptions
***************************************/
#ifndef DEBUG
# define DEBUG 0
#endif
#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
#define EXM_THROW(error, ...) \
{ \
DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "Error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, " \n"); \
return(error); \
}
/*-***************************************
* Local Parameters
*****************************************/
static U32 no_prompt = 0;
static U32 displayLevel = 2;
static U32 use_pause = 0;
/*-*******************************************************
* Fuzzer functions
*********************************************************/
#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
#define MAX(a,b) ( (a) > (b) ? (a) : (b) )
typedef struct {
void* srcBuffer;
size_t srcBufferSize;
void* dstBuffer;
size_t dstBufferSize;
LZ4F_decompressionContext_t ctx;
} cRess_t;
static int createCResources(cRess_t* ress)
{
ress->srcBufferSize = 4 MB;
ress->srcBuffer = malloc(ress->srcBufferSize);
ress->dstBufferSize = 4 MB;
ress->dstBuffer = malloc(ress->dstBufferSize);
if (!ress->srcBuffer || !ress->dstBuffer) {
free(ress->srcBuffer);
free(ress->dstBuffer);
EXM_THROW(20, "Allocation error : not enough memory");
}
if (LZ4F_isError( LZ4F_createDecompressionContext(&(ress->ctx), LZ4F_VERSION) )) {
free(ress->srcBuffer);
free(ress->dstBuffer);
EXM_THROW(21, "Unable to create decompression context");
}
return 0;
}
static void freeCResources(cRess_t ress)
{
free(ress.srcBuffer);
free(ress.dstBuffer);
(void) LZ4F_freeDecompressionContext(ress.ctx);
}
int frameCheck(cRess_t ress, FILE* const srcFile, unsigned bsid, size_t blockSize)
{
LZ4F_errorCode_t nextToLoad = 0;
size_t curblocksize = 0;
int partialBlock = 0;
/* Main Loop */
for (;;) {
size_t readSize;
size_t pos = 0;
size_t decodedBytes = ress.dstBufferSize;
size_t remaining;
LZ4F_frameInfo_t frameInfo;
/* Read input */
readSize = fread(ress.srcBuffer, 1, ress.srcBufferSize, srcFile);
if (!readSize) break; /* reached end of file or stream */
while (pos < readSize) { /* still to read */
/* Decode Input (at least partially) */
if (!nextToLoad) {
/* LZ4F_decompress returned 0 : starting new frame */
curblocksize = 0;
remaining = readSize - pos;
nextToLoad = LZ4F_getFrameInfo(ress.ctx, &frameInfo, (char*)(ress.srcBuffer)+pos, &remaining);
if (LZ4F_isError(nextToLoad))
EXM_THROW(22, "Error getting frame info: %s",
LZ4F_getErrorName(nextToLoad));
if (frameInfo.blockSizeID != bsid)
EXM_THROW(23, "Block size ID %u != expected %u",
frameInfo.blockSizeID, bsid);
pos += remaining;
/* nextToLoad should be block header size */
remaining = nextToLoad;
decodedBytes = ress.dstBufferSize;
nextToLoad = LZ4F_decompress(ress.ctx, ress.dstBuffer, &decodedBytes, (char*)(ress.srcBuffer)+pos, &remaining, NULL);
if (LZ4F_isError(nextToLoad)) EXM_THROW(24, "Decompression error : %s", LZ4F_getErrorName(nextToLoad));
pos += remaining;
}
decodedBytes = ress.dstBufferSize;
/* nextToLoad should be just enough to cover the next block */
if (nextToLoad > (readSize - pos)) {
/* block is not fully contained in current buffer */
partialBlock = 1;
remaining = readSize - pos;
} else {
if (partialBlock) {
partialBlock = 0;
}
remaining = nextToLoad;
}
nextToLoad = LZ4F_decompress(ress.ctx, ress.dstBuffer, &decodedBytes, (char*)(ress.srcBuffer)+pos, &remaining, NULL);
if (LZ4F_isError(nextToLoad)) EXM_THROW(24, "Decompression error : %s", LZ4F_getErrorName(nextToLoad));
curblocksize += decodedBytes;
pos += remaining;
if (!partialBlock) {
/* detect small block due to end of frame; the final 4-byte frame checksum could be left in the buffer */
if ((curblocksize != 0) && (nextToLoad > 4)) {
if (curblocksize != blockSize)
EXM_THROW(25, "Block size %u != expected %u, pos %u\n",
(unsigned)curblocksize, (unsigned)blockSize, (unsigned)pos);
}
curblocksize = 0;
}
}
}
/* can be out because readSize == 0, which could be an fread() error */
if (ferror(srcFile)) EXM_THROW(26, "Read error");
if (nextToLoad!=0) EXM_THROW(27, "Unfinished stream");
return 0;
}
int FUZ_usage(const char* programName)
{
DISPLAY( "Usage :\n");
DISPLAY( " %s [args] filename\n", programName);
DISPLAY( "\n");
DISPLAY( "Arguments :\n");
DISPLAY( " -b# : expected blocksizeID [4-7] (required)\n");
DISPLAY( " -B# : expected blocksize [32-4194304] (required)\n");
DISPLAY( " -v : verbose\n");
DISPLAY( " -h : display help and exit\n");
return 0;
}
int main(int argc, const char** argv)
{
int argNb;
unsigned bsid=0;
size_t blockSize=0;
const char* const programName = argv[0];
/* Check command line */
for (argNb=1; argNb<argc; argNb++) {
const char* argument = argv[argNb];
if(!argument) continue; /* Protection if argument empty */
/* Decode command (note : aggregated short commands are allowed) */
if (argument[0]=='-') {
if (!strcmp(argument, "--no-prompt")) {
no_prompt=1;
displayLevel=1;
continue;
}
argument++;
while (*argument!=0) {
switch(*argument)
{
case 'h':
return FUZ_usage(programName);
case 'v':
argument++;
displayLevel++;
break;
case 'q':
argument++;
displayLevel--;
break;
case 'p': /* pause at the end */
argument++;
use_pause = 1;
break;
case 'b':
argument++;
bsid=0;
while ((*argument>='0') && (*argument<='9')) {
bsid *= 10;
bsid += (unsigned)(*argument - '0');
argument++;
}
break;
case 'B':
argument++;
blockSize=0;
while ((*argument>='0') && (*argument<='9')) {
blockSize *= 10;
blockSize += (size_t)(*argument - '0');
argument++;
}
break;
default:
;
return FUZ_usage(programName);
}
}
} else {
int err;
FILE *srcFile;
cRess_t ress;
if (bsid == 0 || blockSize == 0)
return FUZ_usage(programName);
DISPLAY("Starting frame checker (%i-bits, %s)\n", (int)(sizeof(size_t)*8), LZ4_VERSION_STRING);
err = createCResources(&ress);
if (err) return (err);
srcFile = fopen(argument, "rb");
if ( srcFile==NULL ) {
freeCResources(ress);
EXM_THROW(1, "%s: %s \n", argument, strerror(errno));
}
assert (srcFile != NULL);
err = frameCheck(ress, srcFile, bsid, blockSize);
freeCResources(ress);
fclose(srcFile);
return (err);
}
}
return 0;
}
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