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/* Copyright (C) 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
*
* Implement JSON/eve logging app-layer BitTorrent DHT.
*/
#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 "output-json-bittorrent-dht.h"
#include "rust.h"
typedef struct LogBitTorrentDHTFileCtx_ {
uint32_t flags;
OutputJsonCtx *eve_ctx;
} LogBitTorrentDHTFileCtx;
typedef struct LogBitTorrentDHTLogThread_ {
LogBitTorrentDHTFileCtx *bittorrent_dht_log_ctx;
OutputJsonThreadCtx *ctx;
} LogBitTorrentDHTLogThread;
static int JsonBitTorrentDHTLogger(ThreadVars *tv, void *thread_data, const Packet *p, Flow *f,
void *state, void *tx, uint64_t tx_id)
{
LogBitTorrentDHTLogThread *thread = thread_data;
JsonBuilder *js = CreateEveHeader(
p, LOG_DIR_PACKET, "bittorrent_dht", NULL, thread->bittorrent_dht_log_ctx->eve_ctx);
if (unlikely(js == NULL)) {
return TM_ECODE_FAILED;
}
jb_open_object(js, "bittorrent_dht");
if (!rs_bittorrent_dht_logger_log(tx, js)) {
goto error;
}
jb_close(js);
OutputJsonBuilderBuffer(js, thread->ctx);
jb_free(js);
return TM_ECODE_OK;
error:
jb_free(js);
return TM_ECODE_FAILED;
}
static void OutputBitTorrentDHTLogDeInitCtxSub(OutputCtx *output_ctx)
{
LogBitTorrentDHTFileCtx *bittorrent_dht_log_ctx = (LogBitTorrentDHTFileCtx *)output_ctx->data;
SCFree(bittorrent_dht_log_ctx);
SCFree(output_ctx);
}
static OutputInitResult OutputBitTorrentDHTLogInitSub(ConfNode *conf, OutputCtx *parent_ctx)
{
OutputInitResult result = { NULL, false };
OutputJsonCtx *ajt = parent_ctx->data;
LogBitTorrentDHTFileCtx *bittorrent_dht_log_ctx = SCCalloc(1, sizeof(*bittorrent_dht_log_ctx));
if (unlikely(bittorrent_dht_log_ctx == NULL)) {
return result;
}
bittorrent_dht_log_ctx->eve_ctx = ajt;
OutputCtx *output_ctx = SCCalloc(1, sizeof(*output_ctx));
if (unlikely(output_ctx == NULL)) {
SCFree(bittorrent_dht_log_ctx);
return result;
}
output_ctx->data = bittorrent_dht_log_ctx;
output_ctx->DeInit = OutputBitTorrentDHTLogDeInitCtxSub;
AppLayerParserRegisterLogger(IPPROTO_UDP, ALPROTO_BITTORRENT_DHT);
result.ctx = output_ctx;
result.ok = true;
return result;
}
static TmEcode JsonBitTorrentDHTLogThreadInit(ThreadVars *t, const void *initdata, void **data)
{
LogBitTorrentDHTLogThread *thread = SCCalloc(1, sizeof(*thread));
if (unlikely(thread == NULL)) {
return TM_ECODE_FAILED;
}
if (initdata == NULL) {
SCLogDebug("Error getting context for EveLogBitTorrentDHT. \"initdata\" is NULL.");
goto error_exit;
}
thread->bittorrent_dht_log_ctx = ((OutputCtx *)initdata)->data;
thread->ctx = CreateEveThreadCtx(t, thread->bittorrent_dht_log_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 JsonBitTorrentDHTLogThreadDeinit(ThreadVars *t, void *data)
{
LogBitTorrentDHTLogThread *thread = (LogBitTorrentDHTLogThread *)data;
if (thread == NULL) {
return TM_ECODE_OK;
}
FreeEveThreadCtx(thread->ctx);
SCFree(thread);
return TM_ECODE_OK;
}
void JsonBitTorrentDHTLogRegister(void)
{
if (ConfGetNode("app-layer.protocols.bittorrent-dht") == NULL) {
return;
}
/* Register as an eve sub-module. */
OutputRegisterTxSubModule(LOGGER_JSON_TX, "eve-log", "JsonBitTorrentDHTLog",
"eve-log.bittorrent-dht", OutputBitTorrentDHTLogInitSub, ALPROTO_BITTORRENT_DHT,
JsonBitTorrentDHTLogger, JsonBitTorrentDHTLogThreadInit,
JsonBitTorrentDHTLogThreadDeinit, NULL);
}
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