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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 "config.h"
#ifndef OS_WIN32
#include <sys/utsname.h>
#define VERSION_REGEX "^([0-9]+)\\.([0-9]+)"
int SCKernelVersionIsAtLeast(int major, int minor)
{
struct utsname kuname;
pcre *version_regex;
pcre_extra *version_regex_study;
const char *eb;
int opts = 0;
int eo;
#define MAX_SUBSTRINGS 3 * 6
int ov[MAX_SUBSTRINGS];
int ret;
int kmajor, kminor;
const char **list;
/* get local version */
if (uname(&kuname) != 0) {
SCLogError(SC_ERR_INVALID_VALUE, "Invalid uname return: %s",
strerror(errno));
return 0;
}
SCLogDebug("Kernel release is '%s'", kuname.release);
version_regex = pcre_compile(VERSION_REGEX, opts, &eb, &eo, NULL);
if (version_regex == NULL) {
SCLogError(SC_ERR_PCRE_COMPILE, "pcre compile of \"%s\" failed at offset %" PRId32 ": %s", VERSION_REGEX, eo, eb);
goto error;
}
version_regex_study = pcre_study(version_regex, 0, &eb);
if (eb != NULL) {
SCLogError(SC_ERR_PCRE_STUDY, "pcre study failed: %s", eb);
goto error;
}
ret = pcre_exec(version_regex, version_regex_study, kuname.release,
strlen(kuname.release), 0, 0, ov, MAX_SUBSTRINGS);
if (ret < 0) {
SCLogError(SC_ERR_PCRE_MATCH, "Version did not cut");
goto error;
}
if (ret < 3) {
SCLogError(SC_ERR_PCRE_MATCH, "Version major and minor not found (ret %d)", ret);
goto error;
}
pcre_get_substring_list(kuname.release, ov, ret, &list);
kmajor = atoi(list[1]);
kminor = atoi(list[2]);
pcre_free_substring_list(list);
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(SC_ERR_NOT_SUPPORTED, "OS compare is not supported on Windows");
return 0;
}
#endif /* OS_WIN32 */
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