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/* Copyright (C) 2018-2021 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 Pierre Chifflier <chifflier@wzdftpd.net>
* \author Frank Honza <frank.honza@dcso.de>
*
* Implement JSON/eve logging app-layer IKE.
*/
#include "suricata-common.h"
#include "detect.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 "app-layer-ike.h"
#include "output-json-ike.h"
#include "rust.h"
#define LOG_IKE_DEFAULT 0
#define LOG_IKE_EXTENDED (1 << 0)
typedef struct LogIKEFileCtx_ {
uint32_t flags;
OutputJsonCtx *eve_ctx;
} LogIKEFileCtx;
typedef struct LogIKELogThread_ {
LogIKEFileCtx *ikelog_ctx;
OutputJsonThreadCtx *ctx;
} LogIKELogThread;
bool EveIKEAddMetadata(const Flow *f, uint64_t tx_id, JsonBuilder *js)
{
IKEState *state = FlowGetAppState(f);
if (state) {
IKETransaction *tx = AppLayerParserGetTx(f->proto, ALPROTO_IKE, state, tx_id);
if (tx) {
return rs_ike_logger_log(state, tx, LOG_IKE_EXTENDED, js);
}
}
return false;
}
static int JsonIKELogger(ThreadVars *tv, void *thread_data, const Packet *p, Flow *f, void *state,
void *tx, uint64_t tx_id)
{
LogIKELogThread *thread = thread_data;
JsonBuilder *jb =
CreateEveHeader((Packet *)p, LOG_DIR_PACKET, "ike", NULL, thread->ikelog_ctx->eve_ctx);
if (unlikely(jb == NULL)) {
return TM_ECODE_FAILED;
}
LogIKEFileCtx *ike_ctx = thread->ikelog_ctx;
if (!rs_ike_logger_log(state, tx, ike_ctx->flags, jb)) {
goto error;
}
OutputJsonBuilderBuffer(jb, thread->ctx);
jb_free(jb);
return TM_ECODE_OK;
error:
jb_free(jb);
return TM_ECODE_FAILED;
}
static void OutputIKELogDeInitCtxSub(OutputCtx *output_ctx)
{
LogIKEFileCtx *ikelog_ctx = (LogIKEFileCtx *)output_ctx->data;
SCFree(ikelog_ctx);
SCFree(output_ctx);
}
static OutputInitResult OutputIKELogInitSub(ConfNode *conf, OutputCtx *parent_ctx)
{
OutputInitResult result = { NULL, false };
OutputJsonCtx *ajt = parent_ctx->data;
LogIKEFileCtx *ikelog_ctx = SCCalloc(1, sizeof(*ikelog_ctx));
if (unlikely(ikelog_ctx == NULL)) {
return result;
}
ikelog_ctx->eve_ctx = ajt;
OutputCtx *output_ctx = SCCalloc(1, sizeof(*output_ctx));
if (unlikely(output_ctx == NULL)) {
SCFree(ikelog_ctx);
return result;
}
ikelog_ctx->flags = LOG_IKE_DEFAULT;
const char *extended = ConfNodeLookupChildValue(conf, "extended");
if (extended) {
if (ConfValIsTrue(extended)) {
ikelog_ctx->flags = LOG_IKE_EXTENDED;
}
}
output_ctx->data = ikelog_ctx;
output_ctx->DeInit = OutputIKELogDeInitCtxSub;
AppLayerParserRegisterLogger(IPPROTO_UDP, ALPROTO_IKE);
result.ctx = output_ctx;
result.ok = true;
return result;
}
static TmEcode JsonIKELogThreadInit(ThreadVars *t, const void *initdata, void **data)
{
LogIKELogThread *thread = SCCalloc(1, sizeof(*thread));
if (unlikely(thread == NULL)) {
return TM_ECODE_FAILED;
}
if (initdata == NULL) {
SCLogDebug("Error getting context for EveLogIKE. \"initdata\" is NULL.");
goto error_exit;
}
thread->ikelog_ctx = ((OutputCtx *)initdata)->data;
thread->ctx = CreateEveThreadCtx(t, thread->ikelog_ctx->eve_ctx);
if (!thread->ctx) {
goto error_exit;
}
*data = (void *)thread;
return TM_ECODE_OK;
error_exit:
SCFree(thread);
return TM_ECODE_FAILED;
}
static TmEcode JsonIKELogThreadDeinit(ThreadVars *t, void *data)
{
LogIKELogThread *thread = (LogIKELogThread *)data;
if (thread == NULL) {
return TM_ECODE_OK;
}
FreeEveThreadCtx(thread->ctx);
SCFree(thread);
return TM_ECODE_OK;
}
void JsonIKELogRegister(void)
{
/* Register as an eve sub-module. */
OutputRegisterTxSubModule(LOGGER_JSON_TX, "eve-log", "JsonIKELog", "eve-log.ike",
OutputIKELogInitSub, ALPROTO_IKE, JsonIKELogger, JsonIKELogThreadInit,
JsonIKELogThreadDeinit, NULL);
}
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