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145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* smfwd.c
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* This is a strgen module for the traditional (network) forwarding format.
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*
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* Format generated:
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* "<%PRI%>%TIMESTAMP:::date-rfc3339% %HOSTNAME% %syslogtag:1:32%%msg:::sp-if-no-1st-sp%%msg%"
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*
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* NOTE: read comments in module-template.h to understand how this file
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* works!
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*
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* File begun on 2010-06-01 by RGerhards
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*
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* Copyright 2010-2014 Rainer Gerhards and Adiscon GmbH.
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*
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* This file is part of rsyslog.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* -or-
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* see COPYING.ASL20 in the source distribution
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "config.h"
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#include "rsyslog.h"
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include "syslogd.h"
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#include "conf.h"
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#include "syslogd-types.h"
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#include "template.h"
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#include "msg.h"
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#include "module-template.h"
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#include "unicode-helper.h"
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MODULE_TYPE_STRGEN
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MODULE_TYPE_NOKEEP
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STRGEN_NAME("RSYSLOG_ForwardFormat")
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/* internal structures
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*/
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DEF_SMOD_STATIC_DATA
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/* config data */
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/* This strgen tries to minimize the amount of reallocs be first obtaining pointers to all strings
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* needed (including their length) and then calculating the actual space required. So when we
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* finally copy, we know exactly what we need. So we do at most one alloc.
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*/
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BEGINstrgen
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register int iBuf;
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char *pPRI;
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size_t lenPRI;
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uchar *pTimeStamp;
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size_t lenTimeStamp;
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uchar *pHOSTNAME;
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size_t lenHOSTNAME;
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uchar *pTAG;
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int lenTAG;
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uchar *pMSG;
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size_t lenMSG;
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size_t lenTotal;
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CODESTARTstrgen
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/* first obtain all strings and their length (if not fixed) */
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pPRI = getPRI(pMsg);
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lenPRI = strlen(pPRI);
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pTimeStamp = (uchar*) getTimeReported(pMsg, tplFmtRFC3339Date);
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lenTimeStamp = ustrlen(pTimeStamp);
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pHOSTNAME = (uchar*) getHOSTNAME(pMsg);
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lenHOSTNAME = getHOSTNAMELen(pMsg);
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getTAG(pMsg, &pTAG, &lenTAG);
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if(lenTAG > 32)
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lenTAG = 32; /* for forwarding, a max of 32 chars is permitted (RFC!) */
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pMSG = getMSG(pMsg);
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lenMSG = getMSGLen(pMsg);
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/* calculate len, constants for spaces and similar fixed strings */
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lenTotal = 1 + lenPRI + 1 + lenTimeStamp + 1 + lenHOSTNAME + 1 + lenTAG + lenMSG + 1;
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if(pMSG[0] != ' ')
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++lenTotal; /* then we need to introduce one additional space */
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/* now make sure buffer is large enough */
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if(lenTotal >= iparam->lenBuf)
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CHKiRet(ExtendBuf(iparam, lenTotal));
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/* and concatenate the resulting string */
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iparam->param[0] = '<';
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memcpy(iparam->param + 1, pPRI, lenPRI);
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iBuf = lenPRI + 1;
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iparam->param[iBuf++] = '>';
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memcpy(iparam->param + iBuf, pTimeStamp, lenTimeStamp);
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iBuf += lenTimeStamp;
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iparam->param[iBuf++] = ' ';
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memcpy(iparam->param + iBuf, pHOSTNAME, lenHOSTNAME);
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iBuf += lenHOSTNAME;
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iparam->param[iBuf++] = ' ';
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memcpy(iparam->param + iBuf, pTAG, lenTAG);
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iBuf += lenTAG;
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if(pMSG[0] != ' ')
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iparam->param[iBuf++] = ' ';
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memcpy(iparam->param + iBuf, pMSG, lenMSG);
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iBuf += lenMSG;
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/* string terminator */
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iparam->param[iBuf] = '\0';
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iparam->lenStr = lenTotal - 1; /* do not count \0! */
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finalize_it:
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ENDstrgen
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BEGINmodExit
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CODESTARTmodExit
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ENDmodExit
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BEGINqueryEtryPt
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CODESTARTqueryEtryPt
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CODEqueryEtryPt_STD_SMOD_QUERIES
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ENDqueryEtryPt
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BEGINmodInit(smfwd)
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CODESTARTmodInit
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*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
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CODEmodInit_QueryRegCFSLineHdlr
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dbgprintf("rsyslog standard (network) forward format strgen init called, compiled with version %s\n", VERSION);
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ENDmodInit
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