/* Copyright (C) 2007-2013 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 Tom DeCanio
*
* Implements SMTP JSON logging portion of the engine.
*/
#include "suricata-common.h"
#include "debug.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 "output.h"
#include "app-layer-smtp.h"
#include "app-layer.h"
#include "app-layer-parser.h"
#include "util-privs.h"
#include "util-buffer.h"
#include "util-proto-name.h"
#include "util-logopenfile.h"
#include "util-time.h"
#include "output-json.h"
#include "output-json-email-common.h"
#ifdef HAVE_LIBJANSSON
#include
static int JsonSmtpLogger(ThreadVars *tv, void *thread_data, const Packet *p, Flow *f, void *state, void *tx, uint64_t tx_id)
{
SCEnter();
int r = JsonEmailLogger(tv, thread_data, p, f, state, tx, tx_id);
SCReturnInt(r);
}
static void OutputSmtpLogDeInitCtx(OutputCtx *output_ctx)
{
OutputJsonEmailCtx *email_ctx = output_ctx->data;
if (email_ctx != NULL) {
LogFileFreeCtx(email_ctx->file_ctx);
SCFree(email_ctx);
}
SCFree(output_ctx);
}
static void OutputSmtpLogDeInitCtxSub(OutputCtx *output_ctx)
{
SCLogDebug("cleaning up sub output_ctx %p", output_ctx);
OutputJsonEmailCtx *email_ctx = output_ctx->data;
if (email_ctx != NULL) {
SCFree(email_ctx);
}
SCFree(output_ctx);
}
#define DEFAULT_LOG_FILENAME "smtp.json"
OutputCtx *OutputSmtpLogInit(ConfNode *conf)
{
LogFileCtx *file_ctx = LogFileNewCtx();
if(file_ctx == NULL) {
SCLogError(SC_ERR_HTTP_LOG_GENERIC, "couldn't create new file_ctx");
return NULL;
}
if (SCConfLogOpenGeneric(conf, file_ctx, DEFAULT_LOG_FILENAME, 1) < 0) {
LogFileFreeCtx(file_ctx);
return NULL;
}
OutputJsonEmailCtx *email_ctx = SCMalloc(sizeof(OutputJsonEmailCtx));
if (unlikely(email_ctx == NULL)) {
LogFileFreeCtx(file_ctx);
return NULL;
}
OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx));
if (unlikely(output_ctx == NULL)) {
LogFileFreeCtx(file_ctx);
SCFree(email_ctx);
return NULL;
}
email_ctx->file_ctx = file_ctx;
output_ctx->data = email_ctx;
output_ctx->DeInit = OutputSmtpLogDeInitCtx;
/* enable the logger for the app layer */
AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SMTP);
return output_ctx;
}
static OutputCtx *OutputSmtpLogInitSub(ConfNode *conf, OutputCtx *parent_ctx)
{
OutputJsonCtx *ojc = parent_ctx->data;
OutputJsonEmailCtx *email_ctx = SCMalloc(sizeof(OutputJsonEmailCtx));
if (unlikely(email_ctx == NULL))
return NULL;
OutputCtx *output_ctx = SCCalloc(1, sizeof(OutputCtx));
if (unlikely(output_ctx == NULL)) {
SCFree(email_ctx);
return NULL;
}
email_ctx->file_ctx = ojc->file_ctx;
output_ctx->data = email_ctx;
output_ctx->DeInit = OutputSmtpLogDeInitCtxSub;
/* enable the logger for the app layer */
AppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SMTP);
return output_ctx;
}
#define OUTPUT_BUFFER_SIZE 65535
static TmEcode JsonSmtpLogThreadInit(ThreadVars *t, void *initdata, void **data)
{
JsonEmailLogThread *aft = SCMalloc(sizeof(JsonEmailLogThread));
if (unlikely(aft == NULL))
return TM_ECODE_FAILED;
memset(aft, 0, sizeof(JsonEmailLogThread));
if(initdata == NULL)
{
SCLogDebug("Error getting context for HTTPLog. \"initdata\" argument NULL");
SCFree(aft);
return TM_ECODE_FAILED;
}
/* Use the Ouptut Context (file pointer and mutex) */
aft->emaillog_ctx = ((OutputCtx *)initdata)->data;
aft->buffer = MemBufferCreateNew(OUTPUT_BUFFER_SIZE);
if (aft->buffer == NULL) {
SCFree(aft);
return TM_ECODE_FAILED;
}
*data = (void *)aft;
return TM_ECODE_OK;
}
static TmEcode JsonSmtpLogThreadDeinit(ThreadVars *t, void *data)
{
JsonEmailLogThread *aft = (JsonEmailLogThread *)data;
if (aft == NULL) {
return TM_ECODE_OK;
}
MemBufferFree(aft->buffer);
/* clear memory */
memset(aft, 0, sizeof(JsonEmailLogThread));
SCFree(aft);
return TM_ECODE_OK;
}
void TmModuleJsonSmtpLogRegister (void) {
tmm_modules[TMM_JSONSMTPLOG].name = "JsonSmtpLog";
tmm_modules[TMM_JSONSMTPLOG].ThreadInit = JsonSmtpLogThreadInit;
tmm_modules[TMM_JSONSMTPLOG].ThreadDeinit = JsonSmtpLogThreadDeinit;
tmm_modules[TMM_JSONSMTPLOG].RegisterTests = NULL;
tmm_modules[TMM_JSONSMTPLOG].cap_flags = 0;
tmm_modules[TMM_JSONSMTPLOG].flags = TM_FLAG_LOGAPI_TM;
/* register as separate module */
OutputRegisterTxModule("JsonSmtpLog", "smtp-json-log",
OutputSmtpLogInit, ALPROTO_SMTP,
JsonSmtpLogger);
/* also register as child of eve-log */
OutputRegisterTxSubModule("eve-log", "JsonSmtpLog",
"eve-log.smtp",
OutputSmtpLogInitSub, ALPROTO_SMTP,
JsonSmtpLogger);
}
#else
static TmEcode OutputJsonThreadInit(ThreadVars *t, void *initdata, void **data)
{
SCLogInfo("Can't init JSON output - JSON support was disabled during build.");
return TM_ECODE_FAILED;
}
void TmModuleJsonSmtpLogRegister (void)
{
tmm_modules[TMM_JSONSMTPLOG].name = "JsonSmtpLog";
tmm_modules[TMM_JSONSMTPLOG].ThreadInit = OutputJsonThreadInit;
}
#endif
|