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/* Copyright (C) 2016-2018 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 <eleblond@stamus-networks.com>
*/
#include "suricata-common.h"
#include "tm-threads.h"
#include "flow.h"
#include "flow-bypass.h"
#include "flow-private.h"
#include "util-ebpf.h"
#include "runmodes.h"
#ifdef CAPTURE_OFFLOAD_MANAGER
#define FLOW_BYPASS_DELAY 10
#ifndef TIMEVAL_TO_TIMESPEC
#define TIMEVAL_TO_TIMESPEC(tv, ts) { \
(ts)->tv_sec = (tv)->tv_sec; \
(ts)->tv_nsec = (tv)->tv_usec * 1000; \
}
#endif
typedef struct BypassedFlowManagerThreadData_ {
uint16_t flow_bypassed_cnt_clo;
uint16_t flow_bypassed_pkts;
uint16_t flow_bypassed_bytes;
} BypassedFlowManagerThreadData;
#define BYPASSFUNCMAX 4
typedef struct BypassedCheckFuncItem_ {
BypassedCheckFunc Func;
BypassedCheckFuncInit FuncInit;
void *data;
} BypassedCheckFuncItem;
int g_bypassed_func_max_index = 0;
BypassedCheckFuncItem bypassedfunclist[BYPASSFUNCMAX];
typedef struct BypassedUpdateFuncItem_ {
BypassedUpdateFunc Func;
void *data;
} BypassedUpdateFuncItem;
int g_bypassed_update_max_index = 0;
BypassedUpdateFuncItem updatefunclist[BYPASSFUNCMAX];
static TmEcode BypassedFlowManager(ThreadVars *th_v, void *thread_data)
{
int tcount = 0;
int i;
BypassedFlowManagerThreadData *ftd = thread_data;
struct timespec curtime = {0, 0};
struct timeval tv;
gettimeofday(&tv, NULL);
TIMEVAL_TO_TIMESPEC(&tv, &curtime);
for (i = 0; i < g_bypassed_func_max_index; i++) {
if (bypassedfunclist[i].FuncInit) {
bypassedfunclist[i].FuncInit(th_v, &curtime, bypassedfunclist[i].data);
}
}
/* check if we have a periodic check function */
bool found = false;
for (i = 0; i < g_bypassed_func_max_index; i++) {
if (bypassedfunclist[i].FuncInit) {
found = true;
break;
}
}
if (!found)
return TM_ECODE_OK;
TmThreadsSetFlag(th_v, THV_RUNNING);
while (1) {
if (TmThreadsCheckFlag(th_v, THV_PAUSE)) {
TmThreadsSetFlag(th_v, THV_PAUSED);
TmThreadTestThreadUnPaused(th_v);
TmThreadsUnsetFlag(th_v, THV_PAUSED);
}
SCLogDebug("Dumping the table");
gettimeofday(&tv, NULL);
TIMEVAL_TO_TIMESPEC(&tv, &curtime);
for (i = 0; i < g_bypassed_func_max_index; i++) {
struct flows_stats bypassstats = { 0, 0, 0};
if (bypassedfunclist[i].Func == NULL)
continue;
tcount = bypassedfunclist[i].Func(th_v, &bypassstats, &curtime, bypassedfunclist[i].data);
if (tcount) {
StatsAddUI64(th_v, ftd->flow_bypassed_cnt_clo, (uint64_t)bypassstats.count);
}
StatsAddUI64(th_v, ftd->flow_bypassed_pkts, (uint64_t)bypassstats.packets);
StatsAddUI64(th_v, ftd->flow_bypassed_bytes, (uint64_t)bypassstats.bytes);
}
if (TmThreadsCheckFlag(th_v, THV_KILL)) {
StatsSyncCounters(th_v);
return TM_ECODE_OK;
}
for (i = 0; i < FLOW_BYPASS_DELAY * 100; i++) {
if (TmThreadsCheckFlag(th_v, THV_KILL)) {
StatsSyncCounters(th_v);
return TM_ECODE_OK;
}
StatsSyncCountersIfSignalled(th_v);
usleep(10000);
}
}
return TM_ECODE_OK;
}
static TmEcode BypassedFlowManagerThreadInit(ThreadVars *t, const void *initdata, void **data)
{
BypassedFlowManagerThreadData *ftd = SCCalloc(1, sizeof(BypassedFlowManagerThreadData));
if (ftd == NULL)
return TM_ECODE_FAILED;
*data = ftd;
ftd->flow_bypassed_cnt_clo = StatsRegisterCounter("flow_bypassed.closed", t);
ftd->flow_bypassed_pkts = StatsRegisterCounter("flow_bypassed.pkts", t);
ftd->flow_bypassed_bytes = StatsRegisterCounter("flow_bypassed.bytes", t);
return TM_ECODE_OK;
}
static TmEcode BypassedFlowManagerThreadDeinit(ThreadVars *t, void *data)
{
if (data)
SCFree(data);
return TM_ECODE_OK;
}
int BypassedFlowManagerRegisterCheckFunc(BypassedCheckFunc CheckFunc,
BypassedCheckFuncInit CheckFuncInit,
void *data)
{
if (g_bypassed_func_max_index < BYPASSFUNCMAX) {
bypassedfunclist[g_bypassed_func_max_index].Func = CheckFunc;
bypassedfunclist[g_bypassed_func_max_index].FuncInit = CheckFuncInit;
bypassedfunclist[g_bypassed_func_max_index].data = data;
g_bypassed_func_max_index++;
} else {
return -1;
}
return 0;
}
int BypassedFlowManagerRegisterUpdateFunc(BypassedUpdateFunc UpdateFunc,
void *data)
{
if (!UpdateFunc) {
return -1;
}
if (g_bypassed_update_max_index < BYPASSFUNCMAX) {
updatefunclist[g_bypassed_update_max_index].Func = UpdateFunc;
updatefunclist[g_bypassed_update_max_index].data = data;
g_bypassed_update_max_index++;
} else {
return -1;
}
return 0;
}
#endif
/** \brief spawn the flow bypass manager thread */
void BypassedFlowManagerThreadSpawn(void)
{
#ifdef CAPTURE_OFFLOAD_MANAGER
ThreadVars *tv_flowmgr = NULL;
tv_flowmgr = TmThreadCreateMgmtThreadByName(thread_name_flow_bypass,
"BypassedFlowManager", 0);
BUG_ON(tv_flowmgr == NULL);
if (tv_flowmgr == NULL) {
printf("ERROR: TmThreadsCreate failed\n");
exit(1);
}
if (TmThreadSpawn(tv_flowmgr) != TM_ECODE_OK) {
printf("ERROR: TmThreadSpawn failed\n");
exit(1);
}
#endif
}
void BypassedFlowUpdate(Flow *f, Packet *p)
{
#ifdef CAPTURE_OFFLOAD_MANAGER
for (int i = 0; i < g_bypassed_update_max_index; i++) {
if (updatefunclist[i].Func(f, p, updatefunclist[i].data)) {
return;
}
}
#endif
}
void TmModuleBypassedFlowManagerRegister (void)
{
#ifdef CAPTURE_OFFLOAD_MANAGER
tmm_modules[TMM_BYPASSEDFLOWMANAGER].name = "BypassedFlowManager";
tmm_modules[TMM_BYPASSEDFLOWMANAGER].ThreadInit = BypassedFlowManagerThreadInit;
tmm_modules[TMM_BYPASSEDFLOWMANAGER].ThreadDeinit = BypassedFlowManagerThreadDeinit;
tmm_modules[TMM_BYPASSEDFLOWMANAGER].Management = BypassedFlowManager;
tmm_modules[TMM_BYPASSEDFLOWMANAGER].cap_flags = 0;
tmm_modules[TMM_BYPASSEDFLOWMANAGER].flags = TM_FLAG_MANAGEMENT_TM;
SCLogDebug("%s registered", tmm_modules[TMM_BYPASSEDFLOWMANAGER].name);
#endif
}
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