mirror of
https://github.com/vel21ripn/nDPI.git
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0a47f745cc
The host automa is used for two tasks: * protocol sub-classification (obviously); * DGA evaluation: the idea is that if a domain is present in this automa, it can't be a DGA, regardless of its format/name. In most dissectors both checks are executed, i.e. the code is something like: ``` ndpi_match_host_subprotocol(..., flow->host_server_name, ...); ndpi_check_dga_name(..., flow->host_server_name,...); ``` In that common case, we can perform only one automa lookup: if we check the sub-classification before the DGA, we can avoid the second lookup in the DGA function itself.
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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* dga.c
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*
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* Copyright (C) 2019-20 - ntop.org
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*
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* nDPI is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* nDPI is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <stdint.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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#include <unistd.h>
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#include <ndpi_api.h>
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#include <ndpi_main.h>
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#include <ndpi_typedefs.h>
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#include "ndpi_config.h"
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void help() {
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printf("dga_evaluate <file name> [<verbose>]\n");
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exit(0);
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}
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/* *********************************************** */
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extern int ndpi_verbose_dga_detection;
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int main(int argc, char **argv) {
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FILE *fd;
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char buffer[512];
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int verbose = 0;
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int num_detections = 0;
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if(argc < 2) help();
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fd = fopen(argv[1], "r");
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if(fd == NULL) {
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printf("Unable to open file %s\n", argv[1]);
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exit(0);
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}
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if(argv[2] != NULL) {
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verbose = 1;
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if(argv[3] != NULL)
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ndpi_verbose_dga_detection = 1;
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}
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if (ndpi_get_api_version() != NDPI_API_VERSION) {
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printf("nDPI Library version mismatch: please make sure this code and the nDPI library are in sync\n");
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return -1;
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}
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/* Initialize nDPI detection module*/
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NDPI_PROTOCOL_BITMASK all;
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struct ndpi_detection_module_struct *ndpi_str = ndpi_init_detection_module(ndpi_no_prefs);
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assert(ndpi_str != NULL);
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NDPI_BITMASK_SET_ALL(all);
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ndpi_set_protocol_detection_bitmask2(ndpi_str, &all);
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ndpi_finalize_initialization(ndpi_str);
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assert(ndpi_str != NULL);
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while(fgets(buffer, sizeof(buffer), fd) != NULL) {
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char *hostname = strtok(buffer, "\n");
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if(ndpi_check_dga_name(ndpi_str, NULL, hostname, 1, 1)) {
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if(verbose)
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printf("%10s\t%s\n", "[DGA]", hostname);
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num_detections++;
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} else {
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if(verbose)
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printf("%10s\t%s\n", "[NON DGA]", hostname);
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}
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}
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fclose(fd);
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ndpi_exit_detection_module(ndpi_str);
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printf("%i", num_detections);
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return 0;
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}
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