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/*
* ndpi_filter.c
*
* Copyright (C) 2011-23 - ntop.org and contributors
*
* This file is part of nDPI, an open source deep packet inspection
* library based on the OpenDPI and PACE technology by ipoque GmbH
*
* nDPI 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 3 of the License, or
* (at your option) any later version.
*
* nDPI 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 nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include <sys/types.h>
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_UNKNOWN
#include "ndpi_config.h"
#include "ndpi_api.h"
#include "ndpi_includes.h"
#include "ndpi_encryption.h"
#include "third_party/include/MurmurHash3.h"
/* ******************************************* */
ndpi_filter* ndpi_filter_alloc() {
return((ndpi_filter*)ndpi_bitmap_alloc());
}
/* ******************************************* */
bool ndpi_filter_add(ndpi_filter *f, u_int32_t value) {
if(!f)
return(false);
else {
ndpi_bitmap *filter = (ndpi_bitmap*)f;
ndpi_bitmap_set(filter, value);
return(true);
}
}
/* ******************************************* */
bool ndpi_filter_add_string(ndpi_filter *f, char *string) {
return(ndpi_filter_add(f, ndpi_hash_string(string)));
}
/* ******************************************* */
bool ndpi_filter_contains(ndpi_filter *f, u_int32_t value) {
if(!f)
return(false);
else {
ndpi_bitmap *filter = (ndpi_bitmap*)f;
return(ndpi_bitmap_isset(filter, value));
}
}
/* ******************************************* */
bool ndpi_filter_contains_string(ndpi_filter *f, char *string) {
return(ndpi_filter_contains(f, ndpi_hash_string(string)));
}
/* ******************************************* */
void ndpi_filter_free(ndpi_filter *f) {
if(f != NULL) {
ndpi_bitmap *filter = (ndpi_bitmap*)f;
ndpi_bitmap_free(filter);
}
}
/* ******************************************* */
size_t ndpi_filter_size(ndpi_filter *f) {
if(f != NULL) {
char *buf;
size_t s = ndpi_bitmap_serialize(f, &buf);
if(buf) ndpi_free(buf);
return(s);
} else
return(0);
}
/* ******************************************* */
u_int32_t ndpi_filter_cardinality(ndpi_filter *f) {
return(f ? ndpi_bitmap_cardinality(f) : 0);
}
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