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/* bz2.c: compression module using bz2 for heartbeat.
*
* Copyright (C) 2005 Guochun Shi <gshi@ncsa.uiuc.edu>
*
* SECURITY NOTE: It would be very easy for someone to masquerade as the
* device that you're pinging. If they don't know the password, all they can
* do is echo back the packets that you're sending out, or send out old ones.
* This does mean that if you're using such an approach, that someone could
* make you think you have quorum when you don't during a cluster partition.
* The danger in that seems small, but you never know ;-)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#define PIL_PLUGINTYPE HB_COMPRESS_TYPE
#define PIL_PLUGINTYPE_S HB_COMPRESS_TYPE_S
#define PIL_PLUGIN bz2
#define PIL_PLUGIN_S "bz2"
#define PIL_PLUGINLICENSE LICENSE_LGPL
#define PIL_PLUGINLICENSEURL URL_LGPL
#include <lha_internal.h>
#include <stdio.h>
#include <pils/plugin.h>
#include <compress.h>
#include <bzlib.h>
#include <clplumbing/cl_log.h>
#include <string.h>
static struct hb_compress_fns bz2Ops;
PIL_PLUGIN_BOILERPLATE2("1.0", Debug)
static const PILPluginImports* PluginImports;
static PILPlugin* OurPlugin;
static PILInterface* OurInterface;
static struct hb_media_imports* OurImports;
static void* interfprivate;
#define LOG PluginImports->log
#define MALLOC PluginImports->alloc
#define STRDUP PluginImports->mstrdup
#define FREE PluginImports->mfree
PIL_rc
PIL_PLUGIN_INIT(PILPlugin*us, const PILPluginImports* imports);
PIL_rc
PIL_PLUGIN_INIT(PILPlugin*us, const PILPluginImports* imports)
{
/* Force the compiler to do a little type checking */
(void)(PILPluginInitFun)PIL_PLUGIN_INIT;
PluginImports = imports;
OurPlugin = us;
/* Register ourself as a plugin */
imports->register_plugin(us, &OurPIExports);
/* Register our interface implementation */
return imports->register_interface(us, PIL_PLUGINTYPE_S
, PIL_PLUGIN_S
, &bz2Ops
, NULL /*close */
, &OurInterface
, (void*)&OurImports
, interfprivate);
}
static int
bz2_compress(char* dest, size_t* destlen,
const char* _src, size_t srclen)
{
int ret;
char* src;
unsigned int tmpdestlen;
memcpy(&src, &_src, sizeof(char*));
tmpdestlen = *destlen;
ret = BZ2_bzBuffToBuffCompress(dest, &tmpdestlen, src, srclen, 1, 0, 30);
if (ret != BZ_OK){
cl_log(LOG_ERR, "%s: compression failed",
__FUNCTION__);
return HA_FAIL;
}
*destlen = tmpdestlen;
return HA_OK;
}
static int
bz2_decompress(char* dest, size_t* destlen,
const char* _src, size_t srclen)
{
int ret;
char* src;
unsigned int tmpdestlen;
memcpy(&src, &_src, sizeof(char*));
tmpdestlen = *destlen;
ret = BZ2_bzBuffToBuffDecompress(dest, &tmpdestlen, src, srclen, 1, 0);
if (ret != BZ_OK){
cl_log(LOG_ERR, "%s: decompression failed",
__FUNCTION__);
return HA_FAIL;
}
*destlen = tmpdestlen;
return HA_OK;
}
static const char*
bz2_getname(void)
{
return "bz2";
}
static struct hb_compress_fns bz2Ops ={
bz2_compress,
bz2_decompress,
bz2_getname,
};
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