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/*
* ndpi_geoip.c
*
* Copyright (C) 2021 - ntop.org
*
* This file is part of nDPI, an open source deep packet inspection
* library.
*
* 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 <sys/types.h>
#include <stdint.h>
#include "ndpi_api.h"
#include "ndpi_config.h"
#ifdef HAVE_MAXMINDDB
#include <maxminddb.h>
#endif
/* ********************************************************************************* */
int ndpi_load_geoip(struct ndpi_detection_module_struct *ndpi_str,
const char *ip_city_data, const char *ip_as_data) {
#ifdef HAVE_MAXMINDDB
int status;
ndpi_str->mmdb_city = (void*)ndpi_malloc(sizeof(MMDB_s));
ndpi_str->mmdb_as = (void*)ndpi_malloc(sizeof(MMDB_s));
if((ndpi_str->mmdb_city == NULL) || (ndpi_str->mmdb_as == NULL))
return(-1);
/* Open the MMDB files */
if((status = MMDB_open(ip_city_data, MMDB_MODE_MMAP, (MMDB_s*)ndpi_str->mmdb_city)) != MMDB_SUCCESS)
return(-1);
else
ndpi_str->mmdb_city_loaded = 1;
if((status = MMDB_open(ip_as_data, MMDB_MODE_MMAP, (MMDB_s*)ndpi_str->mmdb_as)) != MMDB_SUCCESS)
return(-2);
else
ndpi_str->mmdb_as_loaded = 1;
return(0);
#else
return(-3);
#endif
}
/* ********************************************************************************* */
void ndpi_free_geoip(struct ndpi_detection_module_struct *ndpi_str) {
#ifdef HAVE_MAXMINDDB
if(ndpi_str->mmdb_city_loaded) MMDB_close((MMDB_s*)ndpi_str->mmdb_city);
if(ndpi_str->mmdb_as_loaded) MMDB_close((MMDB_s*)ndpi_str->mmdb_as);
ndpi_free(ndpi_str->mmdb_city);
ndpi_free(ndpi_str->mmdb_as);
#endif
}
/* ********************************************************************************* */
int ndpi_get_geoip_asn(struct ndpi_detection_module_struct *ndpi_str, char *ip, u_int32_t *asn) {
#ifdef HAVE_MAXMINDDB
int gai_error, mmdb_error, status;
MMDB_lookup_result_s result;
MMDB_entry_data_s entry_data;
if(ndpi_str->mmdb_as_loaded) {
result = MMDB_lookup_string((MMDB_s*)ndpi_str->mmdb_as, ip, &gai_error, &mmdb_error);
if((gai_error != 0)
|| (mmdb_error != MMDB_SUCCESS)
|| (!result.found_entry))
*asn = 0;
else {
/* Get the ASN */
if((status = MMDB_get_value(&result.entry, &entry_data, "autonomous_system_number", NULL)) == MMDB_SUCCESS) {
if(entry_data.has_data && entry_data.type == MMDB_DATA_TYPE_UINT32)
*asn = entry_data.uint32;
else
*asn = 0;
}
}
return(0);
}
#endif
return(-2);
}
/* ********************************************************************************* */
int ndpi_get_geoip_country_continent(struct ndpi_detection_module_struct *ndpi_str, char *ip,
char *country_code, u_int8_t country_code_len,
char *continent, u_int8_t continent_len) {
#ifdef HAVE_MAXMINDDB
int gai_error, mmdb_error;
MMDB_lookup_result_s result;
MMDB_entry_data_s entry_data;
if(ndpi_str->mmdb_city_loaded) {
int status;
result = MMDB_lookup_string((MMDB_s*)ndpi_str->mmdb_city, ip, &gai_error, &mmdb_error);
if((gai_error != 0)
|| (mmdb_error != MMDB_SUCCESS)
|| (!result.found_entry))
country_code[0] = '\0';
else {
if(country_code_len > 0) {
status = MMDB_get_value(&result.entry, &entry_data, "country", "iso_code", NULL);
if((status != MMDB_SUCCESS) || (!entry_data.has_data))
country_code[0] = '\0';
else {
int str_len = ndpi_min(entry_data.data_size, country_code_len);
memcpy(country_code, entry_data.utf8_string, str_len);
country_code[str_len] = '\0';
}
}
if(continent_len > 0) {
status = MMDB_get_value(&result.entry, &entry_data, "continent", "names", "en", NULL);
if((status != MMDB_SUCCESS) || (!entry_data.has_data))
continent[0] = '\0';
else {
int str_len = ndpi_min(entry_data.data_size, continent_len);
memcpy(continent, entry_data.utf8_string, str_len);
continent[str_len] = '\0';
}
}
}
return(0);
}
#endif
return(-2);
}
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