/* 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 Jason Ish <jason.ish@oisf.net>

 */

#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-dhcp.h"

#include "rust.h"

typedef struct LogDHCPFileCtx_ {

    void       *rs_logger;

    OutputJsonCtx *eve_ctx;

} LogDHCPFileCtx;

typedef struct LogDHCPLogThread_ {

    LogDHCPFileCtx *dhcplog_ctx;

    OutputJsonThreadCtx *thread;

} LogDHCPLogThread;

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

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

{

    LogDHCPLogThread *thread = thread_data;

    LogDHCPFileCtx *ctx = thread->dhcplog_ctx;

    if (!rs_dhcp_logger_do_log(ctx->rs_logger, tx)) {

        return TM_ECODE_OK;

    }

    JsonBuilder *js = CreateEveHeader((Packet *)p, 0, "dhcp", NULL, ctx->eve_ctx);

    if (unlikely(js == NULL)) {

        return TM_ECODE_FAILED;

    }

    rs_dhcp_logger_log(ctx->rs_logger, tx, js);

    OutputJsonBuilderBuffer(js, thread->thread);

    jb_free(js);

    return TM_ECODE_OK;

}

static void OutputDHCPLogDeInitCtxSub(OutputCtx *output_ctx)

{

    LogDHCPFileCtx *dhcplog_ctx = (LogDHCPFileCtx *)output_ctx->data;

    rs_dhcp_logger_free(dhcplog_ctx->rs_logger);

    SCFree(dhcplog_ctx);

    SCFree(output_ctx);

}

static OutputInitResult OutputDHCPLogInitSub(ConfNode *conf,

    OutputCtx *parent_ctx)

{

    OutputInitResult result = { NULL, false };

    LogDHCPFileCtx *dhcplog_ctx = SCCalloc(1, sizeof(*dhcplog_ctx));

    if (unlikely(dhcplog_ctx == NULL)) {

        return result;

    }

    dhcplog_ctx->eve_ctx = parent_ctx->data;

    OutputCtx *output_ctx = SCCalloc(1, sizeof(*output_ctx));

    if (unlikely(output_ctx == NULL)) {

        SCFree(dhcplog_ctx);

        return result;

    }

    output_ctx->data = dhcplog_ctx;

    output_ctx->DeInit = OutputDHCPLogDeInitCtxSub;

    dhcplog_ctx->rs_logger = rs_dhcp_logger_new(conf);

    AppLayerParserRegisterLogger(IPPROTO_UDP, ALPROTO_DHCP);

    result.ctx = output_ctx;

    result.ok = true;

    return result;

}

static TmEcode JsonDHCPLogThreadInit(ThreadVars *t, const void *initdata, void **data)

{

    LogDHCPLogThread *thread = SCCalloc(1, sizeof(*thread));

    if (unlikely(thread == NULL)) {

        return TM_ECODE_FAILED;

    }

    LogDHCPFileCtx *ctx = ((OutputCtx *)initdata)->data;

    thread->dhcplog_ctx = ctx;

    thread->thread = CreateEveThreadCtx(t, ctx->eve_ctx);

    if (thread->thread == NULL) {

        SCFree(thread);

        return TM_ECODE_FAILED;

    }

    *data = (void *)thread;

    return TM_ECODE_OK;

}

static TmEcode JsonDHCPLogThreadDeinit(ThreadVars *t, void *data)

{

    LogDHCPLogThread *thread = (LogDHCPLogThread *)data;

    if (thread == NULL) {

        return TM_ECODE_OK;

    }

    FreeEveThreadCtx(thread->thread);

    SCFree(thread);

    return TM_ECODE_OK;

}

void JsonDHCPLogRegister(void)

{

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

    OutputRegisterTxSubModule(LOGGER_JSON_TX, "eve-log", "JsonDHCPLog", "eve-log.dhcp",

            OutputDHCPLogInitSub, ALPROTO_DHCP, JsonDHCPLogger, JsonDHCPLogThreadInit,

            JsonDHCPLogThreadDeinit, NULL);

}