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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 Giuseppe Longo <giuseppelng@gmail.com>
*/
#include "suricata-common.h"
#include "config.h"
#include "tm-threads.h"
#include "conf.h"
#include "runmodes.h"
#include "runmode-nflog.h"
#include "util-debug.h"
#include "util-device.h"
#include "util-runmodes.h"
#include "util-misc.h"
#include "source-nflog.h"
static const char *default_mode = NULL;
const char *RunModeIdsNflogGetDefaultMode(void)
{
return default_mode;
}
void RunModeIdsNflogRegister(void)
{
default_mode = "autofp";
RunModeRegisterNewRunMode(RUNMODE_NFLOG, "autofp",
"Multi threaded nflog mode",
RunModeIdsNflogAutoFp);
RunModeRegisterNewRunMode(RUNMODE_NFLOG, "single",
"Single threaded nflog mode",
RunModeIdsNflogSingle);
RunModeRegisterNewRunMode(RUNMODE_NFLOG, "workers",
"Workers nflog mode",
RunModeIdsNflogWorkers);
return;
}
static void NflogDerefConfig(void *data)
{
NflogGroupConfig *nflogconf = (NflogGroupConfig *)data;
SCFree(nflogconf);
}
void *ParseNflogConfig(const char *group)
{
ConfNode *group_root;
ConfNode *group_default = NULL;
ConfNode *nflog_node;
NflogGroupConfig *nflogconf = SCMalloc(sizeof(*nflogconf));
intmax_t bufsize;
intmax_t bufsize_max;
intmax_t qthreshold;
intmax_t qtimeout;
int boolval;
if (unlikely(nflogconf == NULL))
return NULL;
if (group == NULL) {
SCFree(nflogconf);
return NULL;
}
nflogconf->DerefFunc = NflogDerefConfig;
nflog_node = ConfGetNode("nflog");
if (nflog_node == NULL) {
SCLogInfo("Unable to find nflog config using default value");
return nflogconf;
}
group_root = ConfNodeLookupKeyValue(nflog_node, "group", group);
group_default = ConfNodeLookupKeyValue(nflog_node, "group", "default");
if (group_root == NULL && group_default == NULL) {
SCLogInfo("Unable to find nflog config for "
"group \"%s\" or \"default\", using default value",
group);
return nflogconf;
}
nflogconf->nful_overrun_warned = 0;
strlcpy(nflogconf->numgroup, group, sizeof(nflogconf->numgroup));
if (ParseSizeStringU16(group, &nflogconf->group) < 0) {
SCLogError(SC_ERR_NFLOG_GROUP, "NFLOG's group number invalid.");
exit(EXIT_FAILURE);
}
boolval = ConfGetChildValueIntWithDefault(group_root, group_default,
"buffer-size", &bufsize);
if (boolval)
nflogconf->nlbufsiz = bufsize;
else {
SCLogError(SC_ERR_INVALID_ARGUMENT, "Invalid buffer-size value");
SCFree(nflogconf);
return NULL;
}
boolval = ConfGetChildValueIntWithDefault(group_root, group_default,
"max-size", &bufsize_max);
if (boolval)
nflogconf->nlbufsiz_max = bufsize_max;
else {
SCLogError(SC_ERR_INVALID_ARGUMENT, "Invalid max-size value");
SCFree(nflogconf);
return NULL;
}
if (nflogconf->nlbufsiz > nflogconf->nlbufsiz_max) {
SCLogWarning(SC_ERR_INVALID_ARGUMENT, "buffer-size value larger "
"than max-size value, adjusting buffer-size");
nflogconf->nlbufsiz = nflogconf->nlbufsiz_max;
}
boolval = ConfGetChildValueIntWithDefault(group_root, group_default,
"qthreshold", &qthreshold);
if (boolval)
nflogconf->qthreshold = qthreshold;
else {
SCLogError(SC_ERR_INVALID_ARGUMENT, "Invalid qthreshold value");
SCFree(nflogconf);
return NULL;
}
boolval = ConfGetChildValueIntWithDefault(group_root, group_default,
"qtimeout", &qtimeout);
if (boolval)
nflogconf->qtimeout = qtimeout;
else {
SCLogError(SC_ERR_INVALID_ARGUMENT, "Invalid qtimeout value");
SCFree(nflogconf);
return NULL;
}
return nflogconf;
}
int NflogConfigGeThreadsCount(void *conf)
{
/* for each nflog group there is no reason to use more than 1 thread */
return 1;
}
int RunModeIdsNflogAutoFp(void)
{
SCEnter();
#ifdef HAVE_NFLOG
int ret = 0;
char *live_dev = NULL;
RunModeInitialize();
TimeModeSetLive();
ret = RunModeSetLiveCaptureAutoFp(ParseNflogConfig,
NflogConfigGeThreadsCount,
"ReceiveNFLOG",
"DecodeNFLOG",
"RecvNFLOG",
live_dev);
if (ret != 0) {
SCLogError(SC_ERR_RUNMODE, "Unable to start runmode");
exit(EXIT_FAILURE);
}
SCLogInfo("RunModeIdsNflogAutoFp initialised");
#endif /* HAVE_NFLOG */
SCReturnInt(0);
}
int RunModeIdsNflogSingle(void)
{
SCEnter();
#ifdef HAVE_NFLOG
int ret = 0;
char *live_dev = NULL;
RunModeInitialize();
TimeModeSetLive();
ret = RunModeSetLiveCaptureSingle(ParseNflogConfig,
NflogConfigGeThreadsCount,
"ReceiveNFLOG",
"DecodeNFLOG",
"RecvNFLOG",
live_dev);
if (ret != 0) {
SCLogError(SC_ERR_RUNMODE, "Unable to start runmode");
exit(EXIT_FAILURE);
}
SCLogInfo("RunModeIdsNflogSingle initialised");
#endif /* HAVE_NFLOG */
SCReturnInt(0);
}
int RunModeIdsNflogWorkers(void)
{
SCEnter();
#ifdef HAVE_NFLOG
int ret = 0;
char *live_dev = NULL;
RunModeInitialize();
TimeModeSetLive();
ret = RunModeSetLiveCaptureWorkers(ParseNflogConfig,
NflogConfigGeThreadsCount,
"ReceiveNFLOG",
"DecodeNFLOG",
"RecvNFLOG",
live_dev);
if (ret != 0) {
SCLogError(SC_ERR_RUNMODE, "Unable to start runmode");
exit(EXIT_FAILURE);
}
SCLogInfo("RunModeIdsNflogWorkers initialised");
#endif /* HAVE_NFLOG */
SCReturnInt(0);
}
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