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/* Copyright (C) 2020-2021 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 Philippe Antoine <p.antoine@catenacyber.fr>
*
* Implements HTTP2 JSON logging portion of the engine.
*/
#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-print.h"
#include "util-unittest.h"
#include "util-debug.h"
#include "app-layer-parser.h"
#include "output.h"
#include "app-layer-http2.h"
#include "app-layer.h"
#include "util-privs.h"
#include "util-buffer.h"
#include "util-logopenfile.h"
#include "output-json.h"
#include "output-json-http2.h"
#include "rust.h"
#define MODULE_NAME "LogHttp2Log"
typedef struct OutputHttp2Ctx_ {
OutputJsonCtx *eve_ctx;
} OutputHttp2Ctx;
typedef struct JsonHttp2LogThread_ {
OutputHttp2Ctx *http2log_ctx;
OutputJsonThreadCtx *ctx;
} JsonHttp2LogThread;
bool EveHTTP2AddMetadata(const Flow *f, uint64_t tx_id, JsonBuilder *jb)
{
void *state = FlowGetAppState(f);
if (state) {
void *tx = AppLayerParserGetTx(f->proto, ALPROTO_HTTP2, state, tx_id);
if (tx) {
return rs_http2_log_json(tx, jb);
}
}
return false;
}
static int JsonHttp2Logger(ThreadVars *tv, void *thread_data, const Packet *p,
Flow *f, void *state, void *txptr, uint64_t tx_id)
{
JsonHttp2LogThread *aft = (JsonHttp2LogThread *)thread_data;
if (unlikely(state == NULL)) {
return 0;
}
JsonBuilder *js = CreateEveHeaderWithTxId(
p, LOG_DIR_FLOW, "http", NULL, tx_id, aft->http2log_ctx->eve_ctx);
if (unlikely(js == NULL))
return 0;
jb_open_object(js, "http");
if (!rs_http2_log_json(txptr, js)) {
goto end;
}
jb_close(js);
OutputJsonBuilderBuffer(js, aft->ctx);
end:
jb_free(js);
return 0;
}
static TmEcode JsonHttp2LogThreadInit(ThreadVars *t, const void *initdata, void **data)
{
JsonHttp2LogThread *aft = SCCalloc(1, sizeof(JsonHttp2LogThread));
if (unlikely(aft == NULL))
return TM_ECODE_FAILED;
if(initdata == NULL)
{
SCLogDebug("Error getting context for EveLogHTTP2. \"initdata\" argument NULL");
goto error_exit;
}
/* Use the Output Context (file pointer and mutex) */
aft->http2log_ctx = ((OutputCtx *)initdata)->data;
aft->ctx = CreateEveThreadCtx(t, aft->http2log_ctx->eve_ctx);
if (!aft->ctx) {
goto error_exit;
}
*data = (void *)aft;
return TM_ECODE_OK;
error_exit:
SCFree(aft);
return TM_ECODE_FAILED;
}
static TmEcode JsonHttp2LogThreadDeinit(ThreadVars *t, void *data)
{
JsonHttp2LogThread *aft = (JsonHttp2LogThread *)data;
if (aft == NULL) {
return TM_ECODE_OK;
}
FreeEveThreadCtx(aft->ctx);
/* clear memory */
memset(aft, 0, sizeof(JsonHttp2LogThread));
SCFree(aft);
return TM_ECODE_OK;
}
static void OutputHttp2LogDeinitSub(OutputCtx *output_ctx)
{
OutputHttp2Ctx *http2_ctx = output_ctx->data;
SCFree(http2_ctx);
SCFree(output_ctx);
}
static OutputInitResult OutputHttp2LogInitSub(ConfNode *conf, OutputCtx *parent_ctx)
{
OutputInitResult result = { NULL, false };
OutputJsonCtx *ojc = parent_ctx->data;
OutputHttp2Ctx *http2_ctx = SCMalloc(sizeof(OutputHttp2Ctx));
if (unlikely(http2_ctx == NULL))
return result;
OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx));
if (unlikely(output_ctx == NULL)) {
SCFree(http2_ctx);
return result;
}
http2_ctx->eve_ctx = ojc;
output_ctx->data = http2_ctx;
output_ctx->DeInit = OutputHttp2LogDeinitSub;
AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_HTTP2);
result.ctx = output_ctx;
result.ok = true;
return result;
}
void JsonHttp2LogRegister (void)
{
/* also register as child of eve-log */
OutputRegisterTxSubModuleWithProgress(LOGGER_JSON_TX, "eve-log", MODULE_NAME, "eve-log.http2",
OutputHttp2LogInitSub, ALPROTO_HTTP2, JsonHttp2Logger, HTTP2StateClosed,
HTTP2StateClosed, JsonHttp2LogThreadInit, JsonHttp2LogThreadDeinit, NULL);
}
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