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/* Copyright (C) 2007-2014 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 Anoop Saldanha <anoopsaldanha@gmail.com>
*
*/
#ifndef __UTIL_MPM_AC__H__
#define __UTIL_MPM_AC__H__
#define SC_AC_STATE_TYPE_U16 uint16_t
#define SC_AC_STATE_TYPE_U32 uint32_t
#ifdef __SC_CUDA_SUPPORT__
#include "suricata-common.h"
#include "util-cuda.h"
#include "util-cuda-vars.h"
#include "decode.h"
#include "util-cuda-buffer.h"
#include "util-mpm.h"
#include "flow.h"
#endif /* __SC_CUDA_SUPPORT__ */
typedef struct SCACPattern_ {
/* length of the pattern */
uint16_t len;
/* flags decribing the pattern */
uint8_t flags;
/* holds the original pattern that was added */
uint8_t *original_pat;
/* case sensitive */
uint8_t *cs;
/* case INsensitive */
uint8_t *ci;
/* pattern id */
uint32_t id;
/* sid(s) for this pattern */
uint32_t sids_size;
SigIntId *sids;
struct SCACPattern_ *next;
} SCACPattern;
typedef struct SCACPatternList_ {
uint8_t *cs;
uint16_t patlen;
/* sid(s) for this pattern */
uint32_t sids_size;
SigIntId *sids;
} SCACPatternList;
typedef struct SCACOutputTable_ {
/* list of pattern sids */
uint32_t *pids;
/* no of entries we have in pids */
uint32_t no_of_entries;
} SCACOutputTable;
typedef struct SCACCtx_ {
/* hash used during ctx initialization */
SCACPattern **init_hash;
/* pattern arrays. We need this only during the goto table creation phase */
SCACPattern **parray;
/* no of states used by ac */
uint32_t state_count;
/* the all important memory hungry state_table */
SC_AC_STATE_TYPE_U16 (*state_table_u16)[256];
/* the all important memory hungry state_table */
SC_AC_STATE_TYPE_U32 (*state_table_u32)[256];
/* goto_table, failure table and output table. Needed to create state_table.
* Will be freed, once we have created the state_table */
int32_t (*goto_table)[256];
int32_t *failure_table;
SCACOutputTable *output_table;
SCACPatternList *pid_pat_list;
/* the size of each state */
uint16_t single_state_size;
uint16_t max_pat_id;
uint32_t allocated_state_count;
#ifdef __SC_CUDA_SUPPORT__
CUdeviceptr state_table_u16_cuda;
CUdeviceptr state_table_u32_cuda;
#endif /* __SC_CUDA_SUPPORT__ */
} SCACCtx;
typedef struct SCACThreadCtx_ {
/* the total calls we make to the search function */
uint32_t total_calls;
/* the total patterns that we ended up matching against */
uint64_t total_matches;
} SCACThreadCtx;
void MpmACRegister(void);
#ifdef __SC_CUDA_SUPPORT__
#define MPM_AC_CUDA_MODULE_NAME "ac_cuda"
#define MPM_AC_CUDA_MODULE_CUDA_BUFFER_NAME "ac_cuda_cb"
static inline void CudaBufferPacket(CudaThreadVars *ctv, Packet *p)
{
if (p->cuda_pkt_vars.cuda_mpm_enabled) {
while (!p->cuda_pkt_vars.cuda_done) {
SCMutexLock(&p->cuda_pkt_vars.cuda_mutex);
if (p->cuda_pkt_vars.cuda_done) {
SCMutexUnlock(&p->cuda_pkt_vars.cuda_mutex);
break;
} else {
SCCondWait(&p->cuda_pkt_vars.cuda_cond, &p->cuda_pkt_vars.cuda_mutex);
SCMutexUnlock(&p->cuda_pkt_vars.cuda_mutex);
}
}
}
p->cuda_pkt_vars.cuda_done = 0;
if (p->payload_len == 0 ||
(p->flags & (PKT_NOPAYLOAD_INSPECTION & PKT_NOPACKET_INSPECTION)) ||
(p->flags & PKT_ALLOC) ||
(ctv->data_buffer_size_min_limit != 0 && p->payload_len < ctv->data_buffer_size_min_limit) ||
(p->payload_len > ctv->data_buffer_size_max_limit && ctv->data_buffer_size_max_limit != 0) ) {
p->cuda_pkt_vars.cuda_mpm_enabled = 0;
return;
}
MpmCtx *mpm_ctx = NULL;
if (p->proto == IPPROTO_TCP) {
if (p->flowflags & FLOW_PKT_TOSERVER)
mpm_ctx = ctv->mpm_proto_tcp_ctx_ts;
else
mpm_ctx = ctv->mpm_proto_tcp_ctx_tc;
} else if (p->proto == IPPROTO_UDP) {
if (p->flowflags & FLOW_PKT_TOSERVER)
mpm_ctx = ctv->mpm_proto_udp_ctx_ts;
else
mpm_ctx = ctv->mpm_proto_udp_ctx_tc;
} else {
mpm_ctx = ctv->mpm_proto_other_ctx;
}
if (mpm_ctx == NULL || mpm_ctx->pattern_cnt == 0) {
p->cuda_pkt_vars.cuda_mpm_enabled = 0;
return;
}
#if __WORDSIZE==64
CudaBufferSlice *slice = CudaBufferGetSlice(ctv->cuda_ac_cb,
p->payload_len + sizeof(uint64_t) + sizeof(CUdeviceptr),
(void *)p);
if (slice == NULL) {
SCLogError(SC_ERR_FATAL, "Error retrieving slice. Please report "
"this to dev.");
p->cuda_pkt_vars.cuda_mpm_enabled = 0;
return;
}
*((uint64_t *)(slice->buffer + slice->start_offset)) = p->payload_len;
*((CUdeviceptr *)(slice->buffer + slice->start_offset + sizeof(uint64_t))) = ((SCACCtx *)(mpm_ctx->ctx))->state_table_u32_cuda;
memcpy(slice->buffer + slice->start_offset + sizeof(uint64_t) + sizeof(CUdeviceptr), p->payload, p->payload_len);
#else
CudaBufferSlice *slice = CudaBufferGetSlice(ctv->cuda_ac_cb,
p->payload_len + sizeof(uint32_t) + sizeof(CUdeviceptr),
(void *)p);
if (slice == NULL) {
SCLogError(SC_ERR_FATAL, "Error retrieving slice. Please report "
"this to dev.");
p->cuda_pkt_vars.cuda_mpm_enabled = 0;
return;
}
*((uint32_t *)(slice->buffer + slice->start_offset)) = p->payload_len;
*((CUdeviceptr *)(slice->buffer + slice->start_offset + sizeof(uint32_t))) = ((SCACCtx *)(mpm_ctx->ctx))->state_table_u32_cuda;
memcpy(slice->buffer + slice->start_offset + sizeof(uint32_t) + sizeof(CUdeviceptr), p->payload, p->payload_len);
#endif
p->cuda_pkt_vars.cuda_mpm_enabled = 1;
SC_ATOMIC_SET(slice->done, 1);
SCLogDebug("cuda ac buffering packet %p, payload_len - %"PRIu16" and deviceptr - %"PRIu64"\n",
p, p->payload_len, (unsigned long)((SCACCtx *)(mpm_ctx->ctx))->state_table_u32_cuda);
return;
}
void MpmACCudaRegister(void);
void SCACConstructBoth16and32StateTables(void);
int MpmCudaBufferSetup(void);
int MpmCudaBufferDeSetup(void);
void SCACCudaStartDispatcher(void);
void SCACCudaKillDispatcher(void);
uint32_t SCACCudaPacketResultsProcessing(Packet *p, MpmCtx *mpm_ctx,
PatternMatcherQueue *pmq);
void DetermineCudaStateTableSize(DetectEngineCtx *de_ctx);
void CudaReleasePacket(Packet *p);
#endif /* __SC_CUDA_SUPPORT__ */
#endif /* __UTIL_MPM_AC__H__ */
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