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/*
* ndpi_domains.c
*
* Copyright (C) 2011-24 - ntop.org and contributors
*
* 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 "ndpi_config.h"
#include "ndpi_api.h"
#include "ndpi_includes.h"
#include "ndpi_private.h"
/* ******************************* */
int ndpi_load_domain_suffixes(struct ndpi_detection_module_struct *ndpi_str,
char *public_suffix_list_path) {
char buf[256], *line;
FILE *fd;
u_int16_t domain_id = 1;
if(ndpi_str == NULL || public_suffix_list_path == NULL)
return(-1);
if((fd = fopen(public_suffix_list_path, "r")) == NULL)
return(-2);
if(ndpi_str->public_domain_suffixes != NULL) {
/* An existing license was aleady loaded: free it and start over */
ndpi_hash_free(&ndpi_str->public_domain_suffixes);
}
if(ndpi_hash_init(&ndpi_str->public_domain_suffixes) != 0)
return(-3);
while((line = fgets(buf, sizeof(buf), fd)) != NULL) {
u_int offset, len;
/* Skip private domains */
if(strstr(line, "// ===END ICANN DOMAINS==="))
break;
/* Skip empty lines or comments */
if((line[0] == '\0') || (line[0] == '/') || (line[0] == '\n') || (line[0] == '\r'))
continue;
if((line[0] == '*') && (line[1] == '.') && (line[2] != '\0'))
offset = 2;
else
offset = 0;
len = strlen(line) - 1;
while((len > 0) && (line[len] == '\n'))
line[len--] = '\0';
if(ndpi_hash_add_entry(&ndpi_str->public_domain_suffixes,
&line[offset], strlen(&line[offset]), domain_id) != 0) {
NDPI_LOG_ERR(ndpi_str, "Error while processing domain %s\n", &line[offset]);
} else
domain_id++;
}
fclose(fd);
if(domain_id > 0)
NDPI_LOG_DBG(ndpi_str, "Loaded %u domains\n", domain_id-1);
return(0);
}
/* ******************************* */
/*
Example
- www.ntop.org -> org
- www.bbc.co.uk -> co.uk
*/
const char* ndpi_get_host_domain_suffix(struct ndpi_detection_module_struct *ndpi_str,
const char *hostname,
u_int16_t *domain_id /* out */) {
char *dot, *prev_dot;
if(!ndpi_str || !hostname || !domain_id)
return NULL;
*domain_id = 0;
if(ndpi_str->public_domain_suffixes == NULL)
return(hostname);
prev_dot = dot = strrchr(hostname, '.');
while(dot != NULL) {
while((dot != hostname) && (dot[0] != '.'))
dot--;
if((dot == hostname)
|| (ndpi_hash_find_entry(ndpi_str->public_domain_suffixes,
&dot[1], strlen(&dot[1]), domain_id) != 0)) {
/* Not found: end of search */
return(&prev_dot[1]);
}
prev_dot = dot;
dot--;
}
return(hostname);
}
/*
Example
- www.ntop.org -> ntop.org
- www.bbc.co.uk -> bbc.co.uk
*/
const char* ndpi_get_host_domain(struct ndpi_detection_module_struct *ndpi_str,
const char *hostname) {
const char *ret;
char *dot;
u_int16_t domain_id;
if(!ndpi_str)
return NULL;
if(ndpi_str->public_domain_suffixes == NULL)
return(hostname);
ret = ndpi_get_host_domain_suffix(ndpi_str, hostname, &domain_id);
if((ret == NULL) || (ret == hostname))
return(hostname);
dot = ndpi_strrstr(hostname, ret);
if(dot == NULL || dot == hostname)
return(hostname);
dot--;
while(dot != hostname) {
dot--;
if(dot[0] == '.')
return(&dot[1]);
}
return(hostname);
}
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