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suricata/src/output-json-smb.c

209 lines
5.0 KiB
C

/* Copyright (C) 2017 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 Victor Julien <victor@inliniac.net>
*
* Implement JSON/eve logging app-layer SMB.
*/
#include "suricata-common.h"
#include "debug.h"
#include "pkt-var.h"
#include "conf.h"
#include "threads.h"
#include "threadvars.h"
#include "tm-threads.h"
#include "util-unittest.h"
#include "util-buffer.h"
#include "util-debug.h"
#include "util-byte.h"
#include "output.h"
#include "output-json.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "output-json-smb.h"
#ifdef HAVE_RUST
#ifdef HAVE_LIBJANSSON
#include "rust.h"
#include "rust-smb-log-gen.h"
typedef struct LogSMBFileCtx_ {
LogFileCtx *file_ctx;
uint32_t flags;
} LogSMBFileCtx;
typedef struct LogSMBLogThread_ {
LogSMBFileCtx *smblog_ctx;
uint32_t count;
MemBuffer *buffer;
} LogSMBLogThread;
json_t *JsonSMBAddMetadata(const Flow *f, uint64_t tx_id)
{
SMBState *state = FlowGetAppState(f);
if (state) {
SMBTransaction *tx = AppLayerParserGetTx(f->proto, ALPROTO_SMB, state, tx_id);
if (tx) {
return rs_smb_log_json_response(state, tx);
}
}
return NULL;
}
static int JsonSMBLogger(ThreadVars *tv, void *thread_data,
const Packet *p, Flow *f, void *state, void *tx, uint64_t tx_id)
{
//SMBTransaction *smbtx = tx;
LogSMBLogThread *thread = thread_data;
json_t *js, *smbjs;
js = CreateJSONHeader((Packet *)p, 0, "smb");
if (unlikely(js == NULL)) {
return TM_ECODE_FAILED;
}
smbjs = rs_smb_log_json_response(state, tx);
if (unlikely(smbjs == NULL)) {
goto error;
}
json_object_set_new(js, "smb", smbjs);
MemBufferReset(thread->buffer);
OutputJSONBuffer(js, thread->smblog_ctx->file_ctx, &thread->buffer);
json_decref(js);
return TM_ECODE_OK;
error:
json_decref(js);
return TM_ECODE_FAILED;
}
static void OutputSMBLogDeInitCtxSub(OutputCtx *output_ctx)
{
LogSMBFileCtx *smblog_ctx = (LogSMBFileCtx *)output_ctx->data;
SCFree(smblog_ctx);
SCFree(output_ctx);
}
static OutputInitResult OutputSMBLogInitSub(ConfNode *conf,
OutputCtx *parent_ctx)
{
OutputInitResult result = { NULL, false };
OutputJsonCtx *ajt = parent_ctx->data;
LogSMBFileCtx *smblog_ctx = SCCalloc(1, sizeof(*smblog_ctx));
if (unlikely(smblog_ctx == NULL)) {
return result;
}
smblog_ctx->file_ctx = ajt->file_ctx;
OutputCtx *output_ctx = SCCalloc(1, sizeof(*output_ctx));
if (unlikely(output_ctx == NULL)) {
SCFree(smblog_ctx);
return result;
}
output_ctx->data = smblog_ctx;
output_ctx->DeInit = OutputSMBLogDeInitCtxSub;
SCLogDebug("SMB log sub-module initialized.");
AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SMB);
AppLayerParserRegisterLogger(IPPROTO_UDP, ALPROTO_SMB);
result.ctx = output_ctx;
result.ok = true;
return result;
}
#define OUTPUT_BUFFER_SIZE 65535
static TmEcode JsonSMBLogThreadInit(ThreadVars *t, const void *initdata, void **data)
{
LogSMBLogThread *thread = SCCalloc(1, sizeof(*thread));
if (unlikely(thread == NULL)) {
return TM_ECODE_FAILED;
}
if (initdata == NULL) {
SCLogDebug("Error getting context for EveLogSMB. \"initdata\" is NULL.");
SCFree(thread);
return TM_ECODE_FAILED;
}
thread->buffer = MemBufferCreateNew(OUTPUT_BUFFER_SIZE);
if (unlikely(thread->buffer == NULL)) {
SCFree(thread);
return TM_ECODE_FAILED;
}
thread->smblog_ctx = ((OutputCtx *)initdata)->data;
*data = (void *)thread;
return TM_ECODE_OK;
}
static TmEcode JsonSMBLogThreadDeinit(ThreadVars *t, void *data)
{
LogSMBLogThread *thread = (LogSMBLogThread *)data;
if (thread == NULL) {
return TM_ECODE_OK;
}
if (thread->buffer != NULL) {
MemBufferFree(thread->buffer);
}
SCFree(thread);
return TM_ECODE_OK;
}
void JsonSMBLogRegister(void)
{
/* Register as an eve sub-module. */
OutputRegisterTxSubModule(LOGGER_JSON_SMB, "eve-log", "JsonSMBLog",
"eve-log.smb", OutputSMBLogInitSub, ALPROTO_SMB,
JsonSMBLogger, JsonSMBLogThreadInit,
JsonSMBLogThreadDeinit, NULL);
SCLogDebug("SMB JSON logger registered.");
}
#else /* No JSON support. */
void JsonSMBLogRegister(void)
{
}
#endif /* HAVE_LIBJANSSON */
#else /* no rust */
void JsonSMBLogRegister(void)
{
}
#endif /* HAVE_RUST */