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/* 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);
}
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