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/*
* Copyright (C) 2017-2019 Red Hat, Inc. All rights reserved.
*
* Author: Fabio M. Di Nitto <fabbione@kronosnet.org>
*
* This software licensed under LGPL-2.0+
*/
#define KNET_MODULE
#include "config.h"
#include <errno.h>
#include <bzlib.h>
#include "logging.h"
#include "compress_model.h"
#ifdef BZIP2_COMPRESS_LEVEL
#define KNET_COMPRESS_DEFAULT BZIP2_COMPRESS_LEVEL
#else
#define KNET_COMPRESS_DEFAULT KNET_COMPRESS_UNKNOWN_DEFAULT
#endif
static int bzip2_compress(
knet_handle_t knet_h,
const unsigned char *buf_in,
const ssize_t buf_in_len,
unsigned char *buf_out,
ssize_t *buf_out_len)
{
int err = 0;
int savederrno = 0;
unsigned int destLen = KNET_DATABUFSIZE_COMPRESS;
err = BZ2_bzBuffToBuffCompress((char *)buf_out, &destLen,
(char *)buf_in, buf_in_len,
knet_h->compress_level,
0, 0);
switch(err) {
case BZ_OK:
*buf_out_len = destLen;
break;
case BZ_MEM_ERROR:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 compress has not enough memory");
savederrno = ENOMEM;
err = -1;
break;
case BZ_OUTBUFF_FULL:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 unable to compress source in destination buffer");
savederrno = E2BIG;
err = -1;
break;
default:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 compress unknown error %d", err);
savederrno = EINVAL;
err = -1;
break;
}
errno = savederrno;
return err;
}
static int bzip2_decompress(
knet_handle_t knet_h,
const unsigned char *buf_in,
const ssize_t buf_in_len,
unsigned char *buf_out,
ssize_t *buf_out_len)
{
int err = 0;
int savederrno = 0;
unsigned int destLen = KNET_DATABUFSIZE_COMPRESS;
err = BZ2_bzBuffToBuffDecompress((char *)buf_out, &destLen,
(char *)buf_in, buf_in_len,
0, 0);
switch(err) {
case BZ_OK:
*buf_out_len = destLen;
break;
case BZ_MEM_ERROR:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 decompress has not enough memory");
savederrno = ENOMEM;
err = -1;
break;
case BZ_OUTBUFF_FULL:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 unable to decompress source in destination buffer");
savederrno = E2BIG;
err = -1;
break;
case BZ_DATA_ERROR:
case BZ_DATA_ERROR_MAGIC:
case BZ_UNEXPECTED_EOF:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 decompress detected input data corruption");
savederrno = EINVAL;
err = -1;
break;
default:
log_err(knet_h, KNET_SUB_BZIP2COMP, "bzip2 decompress unknown error %d", err);
savederrno = EINVAL;
err = -1;
break;
}
errno = savederrno;
return err;
}
static int bzip2_get_default_level()
{
return KNET_COMPRESS_DEFAULT;
}
compress_ops_t compress_model = {
KNET_COMPRESS_MODEL_ABI,
NULL,
NULL,
NULL,
NULL,
bzip2_compress,
bzip2_decompress,
bzip2_get_default_level
};

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