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/* smtradfwd.c
* This is a strgen module for the traditional forwarding format.
*
* Format generated:
* "<%PRI%>%TIMESTAMP% %HOSTNAME% %syslogtag:1:32%%msg:::sp-if-no-1st-sp%%msg%"
*
* NOTE: read comments in module-template.h to understand how this file
* works!
*
* File begun on 2010-06-01 by RGerhards
*
* Copyright 2010-2014 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* -or-
* see COPYING.ASL20 in the source distribution
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include "rsyslog.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include "syslogd.h"
#include "conf.h"
#include "syslogd-types.h"
#include "template.h"
#include "msg.h"
#include "module-template.h"
#include "unicode-helper.h"
MODULE_TYPE_STRGEN
MODULE_TYPE_NOKEEP
STRGEN_NAME("RSYSLOG_TraditionalForwardFormat")
/* internal structures
*/
DEF_SMOD_STATIC_DATA
/* config data */
/* This strgen tries to minimize the amount of reallocs be first obtaining pointers to all strings
* needed (including their length) and then calculating the actual space required. So when we
* finally copy, we know exactly what we need. So we do at most one alloc.
*/
BEGINstrgen
register int iBuf;
const char *pPRI;
size_t lenPRI;
uchar *pTimeStamp;
uchar *pHOSTNAME;
size_t lenHOSTNAME;
uchar *pTAG;
int lenTAG;
uchar *pMSG;
size_t lenMSG;
size_t lenTotal;
CODESTARTstrgen
/* first obtain all strings and their length (if not fixed) */
pPRI = getPRI(pMsg);
lenPRI = strlen(pPRI);
pTimeStamp = (uchar*) getTimeReported(pMsg, tplFmtRFC3164Date);
pHOSTNAME = (uchar*) getHOSTNAME(pMsg);
lenHOSTNAME = getHOSTNAMELen(pMsg);
getTAG(pMsg, &pTAG, &lenTAG, LOCK_MUTEX);
if(lenTAG > 32)
lenTAG = 32; /* for forwarding, a max of 32 chars is permitted (RFC!) */
pMSG = getMSG(pMsg);
lenMSG = getMSGLen(pMsg);
/* calculate len, constants for spaces and similar fixed strings */
lenTotal = 1 + lenPRI + 1 + CONST_LEN_TIMESTAMP_3164 + 1 + lenHOSTNAME + 1 + lenTAG + lenMSG + 1;
if(pMSG[0] != ' ')
++lenTotal; /* then we need to introduce one additional space */
/* now make sure buffer is large enough */
if(lenTotal >= iparam->lenBuf)
CHKiRet(ExtendBuf(iparam, lenTotal));
/* and concatenate the resulting string */
iparam->param[0] = '<';
memcpy(iparam->param + 1, pPRI, lenPRI);
iBuf = lenPRI + 1;
iparam->param[iBuf++] = '>';
memcpy(iparam->param + iBuf, pTimeStamp, CONST_LEN_TIMESTAMP_3164);
iBuf += CONST_LEN_TIMESTAMP_3164;
iparam->param[iBuf++] = ' ';
memcpy(iparam->param + iBuf, pHOSTNAME, lenHOSTNAME);
iBuf += lenHOSTNAME;
iparam->param[iBuf++] = ' ';
memcpy(iparam->param + iBuf, pTAG, lenTAG);
iBuf += lenTAG;
if(pMSG[0] != ' ')
iparam->param[iBuf++] = ' ';
memcpy(iparam->param + iBuf, pMSG, lenMSG);
iBuf += lenMSG;
/* string terminator */
iparam->param[iBuf] = '\0';
iparam->lenStr = lenTotal - 1; /* do not count \0! */
finalize_it:
ENDstrgen
BEGINmodExit
CODESTARTmodExit
ENDmodExit
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_SMOD_QUERIES
ENDqueryEtryPt
BEGINmodInit(smtradfwd)
CODESTARTmodInit
*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
CODEmodInit_QueryRegCFSLineHdlr
dbgprintf("rsyslog traditional (network) forward format strgen init called, compiled with "
"version %s\n", VERSION);
ENDmodInit
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