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/*
* Copyright (C) 2014-2024 Firejail Authors
*
* This file is part of firejail project
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "fnettrace.h"
#include "radix.h"
#define MAXBUF 1024
int geoip_calls = 0;
static int geoip_not_found = 0;
static char buf[MAXBUF];
char *retrieve_hostname(uint32_t ip) {
if (geoip_not_found)
return NULL;
if (access("/usr/bin/geoiplookup", X_OK)) {
geoip_not_found = 1;
return NULL;
}
geoip_calls++;
char *rv = NULL;
char *cmd;
if (asprintf(&cmd, "/usr/bin/geoiplookup %d.%d.%d.%d", PRINT_IP(ip)) == -1)
errExit("asprintf");
FILE *fp = popen(cmd, "r");
if (!fp) {
geoip_not_found = 1;
goto out;
}
char *ptr;
if (fgets(buf, MAXBUF, fp)) {
ptr = strchr(buf, '\n');
if (ptr)
*ptr = '\0';
if (strncmp(buf, "GeoIP Country Edition:", 22) == 0) {
ptr = buf + 22;
if (*ptr == ' ' && *(ptr + 3) == ',' && *(ptr + 4) == ' ') {
rv = ptr + 5;
if (strcmp(rv, "United States") == 0)
rv = "US";
}
}
}
pclose(fp);
if (rv)
rv = strdup(rv);
out:
free(cmd);
return rv;
}
void load_hostnames(const char *fname) {
assert(fname);
FILE *fp = fopen(fname, "r");
if (!fp) {
fprintf(stderr, "Warning: cannot find %s file\n", fname);
return;
}
char buf[MAXBUF];
int line = 0;
while (fgets(buf, MAXBUF, fp)) {
line++;
// skip empty spaces
char *start = buf;
while (*start == ' ' || *start == '\t')
start++;
// comments
if (*start == '#')
continue;
char *end = strchr(start, '#');
if (end)
*end = '\0';
// end
end = strchr(start, '\n');
if (end)
*end = '\0';
end = start + strlen(start);
if (end == start) // empty line
continue;
// line format: 1.2.3.4/32 name_without_empty_spaces
// a single empty space between address and name
end = strchr(start, ' ');
if (!end)
goto errexit;
*end = '\0';
end++;
if (*end == '\0')
goto errexit;
uint32_t ip;
uint32_t mask;
if (atocidr(start, &ip, &mask)) {
fprintf(stderr, "Error: invalid CIDR address\n");
goto errexit;
}
radix_add(ip, mask, end);
}
fclose(fp);
return;
errexit:
fprintf(stderr, "Error: invalid line %d in file %s\n", line, fname);
exit(1);
}
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