/* Copyright (C) 2015-2021 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 Victor Julien <victor@inliniac.net>

 *

 * Implement JSON/eve logging app-layer NFS.

 */

#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-nfs.h"

#include "rust.h"

bool EveNFSAddMetadataRPC(const Flow *f, uint64_t tx_id, JsonBuilder *jb)

{

    NFSState *state = FlowGetAppState(f);

    if (state) {

        NFSTransaction *tx = AppLayerParserGetTx(f->proto, ALPROTO_NFS, state, tx_id);

        if (tx) {

            return rs_rpc_log_json_response(tx, jb);

        }

    }

    return false;

}

bool EveNFSAddMetadata(const Flow *f, uint64_t tx_id, JsonBuilder *jb)

{

    NFSState *state = FlowGetAppState(f);

    if (state) {

        NFSTransaction *tx = AppLayerParserGetTx(f->proto, ALPROTO_NFS, state, tx_id);

        if (tx) {

            return rs_nfs_log_json_response(state, tx, jb);

        }

    }

    return false;

}

static int JsonNFSLogger(ThreadVars *tv, void *thread_data,

    const Packet *p, Flow *f, void *state, void *tx, uint64_t tx_id)

{

    NFSTransaction *nfstx = tx;

    OutputJsonThreadCtx *thread = thread_data;

    if (rs_nfs_tx_logging_is_filtered(state, nfstx))

        return TM_ECODE_OK;

    JsonBuilder *jb = CreateEveHeader(p, LOG_DIR_PACKET, "nfs", NULL, thread->ctx);

    if (unlikely(jb == NULL)) {

        return TM_ECODE_OK;

    }

    jb_open_object(jb, "rpc");

    rs_rpc_log_json_response(tx, jb);

    jb_close(jb);

    jb_open_object(jb, "nfs");

    rs_nfs_log_json_response(state, tx, jb);

    jb_close(jb);

    MemBufferReset(thread->buffer);

    OutputJsonBuilderBuffer(jb, thread);

    jb_free(jb);

    return TM_ECODE_OK;

}

static OutputInitResult NFSLogInitSub(ConfNode *conf,

    OutputCtx *parent_ctx)

{

    AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_NFS);

    AppLayerParserRegisterLogger(IPPROTO_UDP, ALPROTO_NFS);

    return OutputJsonLogInitSub(conf, parent_ctx);

}

void JsonNFSLogRegister(void)

{

    /* Register as an eve sub-module. */

    OutputRegisterTxSubModule(LOGGER_JSON_TX, "eve-log", "JsonNFSLog", "eve-log.nfs", NFSLogInitSub,

            ALPROTO_NFS, JsonNFSLogger, JsonLogThreadInit, JsonLogThreadDeinit, NULL);

    SCLogDebug("NFS JSON logger registered.");

}