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/* Copyright (C) 2014 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* 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
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/**
* \file
*
* \author Eric Leblond <eric@regit.org>
*
* Get information on running host
*
*/
#include "suricata-common.h"
#include "util-host-info.h"
#include "util-byte.h"
#include "util-debug.h"
#ifndef OS_WIN32
#include <sys/utsname.h>
#define VERSION_REGEX "^([0-9]+)\\.([0-9]+)"
int SCKernelVersionIsAtLeast(int major, int minor)
{
struct utsname kuname;
pcre2_code *version_regex;
pcre2_match_data *version_regex_match;
int en;
int opts = 0;
PCRE2_SIZE eo;
int ret;
int kmajor, kminor;
PCRE2_UCHAR **list;
/* get local version */
if (uname(&kuname) != 0) {
SCLogError("Invalid uname return: %s", strerror(errno));
return 0;
}
SCLogDebug("Kernel release is '%s'", kuname.release);
version_regex =
pcre2_compile((PCRE2_SPTR8)VERSION_REGEX, PCRE2_ZERO_TERMINATED, opts, &en, &eo, NULL);
if (version_regex == NULL) {
PCRE2_UCHAR errbuffer[256];
pcre2_get_error_message(en, errbuffer, sizeof(errbuffer));
SCLogError("pcre2 compile of \"%s\" failed at "
"offset %d: %s",
VERSION_REGEX, (int)eo, errbuffer);
goto error;
}
version_regex_match = pcre2_match_data_create_from_pattern(version_regex, NULL);
ret = pcre2_match(version_regex, (PCRE2_SPTR8)kuname.release, strlen(kuname.release), 0, 0,
version_regex_match, NULL);
if (ret < 0) {
SCLogError("Version did not cut");
goto error;
}
if (ret < 3) {
SCLogError("Version major and minor not found (ret %d)", ret);
goto error;
}
pcre2_substring_list_get(version_regex_match, &list, NULL);
bool err = false;
if (StringParseInt32(&kmajor, 10, 0, (const char *)list[1]) < 0) {
SCLogError("Invalid value for kmajor: '%s'", list[1]);
err = true;
}
if (StringParseInt32(&kminor, 10, 0, (const char *)list[2]) < 0) {
SCLogError("Invalid value for kminor: '%s'", list[2]);
err = true;
}
pcre2_substring_list_free((PCRE2_SPTR *)list);
pcre2_match_data_free(version_regex_match);
pcre2_code_free(version_regex);
if (err)
goto error;
if (kmajor > major)
return 1;
if (kmajor == major && kminor >= minor)
return 1;
error:
return 0;
}
#else /* OS_WIN32 */
int SCKernelVersionIsAtLeast(int major, int minor)
{
SCLogError("OS compare is not supported on Windows");
return 0;
}
#endif /* OS_WIN32 */
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