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template.h
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template.h
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/* This is the header for template processing code of rsyslog.
* begun 2004-11-17 rgerhards
*
* Copyright (C) 2004-2013 by 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.
*
* Note: there is a tiny bit of code left where I could not get any response
* from the author if this code can be placed under ASL2.0. I have guarded this
* with #ifdef STRICT_GPLV3. Only if that macro is defined, the code will be
* compiled. Otherwise this feature is not present. The plan is to do a
* different implementation in the future to get rid of this problem.
* rgerhards, 2012-08-25
*/
#ifndef TEMPLATE_H_INCLUDED
#define TEMPLATE_H_INCLUDED 1
#include <json.h>
#include <libestr.h>
#include "regexp.h"
#include "stringbuf.h"
struct template {
struct template *pNext;
char *pszName;
int iLenName;
rsRetVal (*pStrgen)(const msg_t*const, actWrkrIParams_t *const iparam);
sbool bHaveSubtree;
msgPropDescr_t subtree; /* subtree property name for subtree-type templates */
int tpenElements; /* number of elements in templateEntry list */
struct templateEntry *pEntryRoot;
struct templateEntry *pEntryLast;
char optFormatEscape; /* in text fields, */
# define NO_ESCAPE 0 /* 0 - do not escape, */
# define SQL_ESCAPE 1 /* 1 - escape "the MySQL way" */
# define STDSQL_ESCAPE 2 /* 2 - escape quotes by double quotes, */
# define JSON_ESCAPE 3 /* 3 - escape double quotes for JSON. */
/* following are options. All are 0/1 defined (either on or off).
* we use chars because they are faster than bit fields and smaller
* than short...
*/
};
enum EntryTypes { UNDEFINED = 0, CONSTANT = 1, FIELD = 2 };
enum tplFormatTypes { tplFmtDefault = 0, tplFmtMySQLDate = 1,
tplFmtRFC3164Date = 2, tplFmtRFC3339Date = 3, tplFmtPgSQLDate = 4,
tplFmtSecFrac = 5, tplFmtRFC3164BuggyDate = 6, tplFmtUnixDate = 7,
tplFmtWDayName = 8, tplFmtYear = 9, tplFmtMonth = 10, tplFmtDay = 11,
tplFmtHour = 12, tplFmtMinute = 13, tplFmtSecond = 14,
tplFmtTZOffsHour = 15, tplFmtTZOffsMin = 16, tplFmtTZOffsDirection = 17,
tplFmtWDay = 18, tplFmtOrdinal = 19, tplFmtWeek = 20};
enum tplFormatCaseConvTypes { tplCaseConvNo = 0, tplCaseConvUpper = 1, tplCaseConvLower = 2 };
enum tplRegexType { TPL_REGEX_BRE = 0, /* posix BRE */
TPL_REGEX_ERE = 1 /* posix ERE */
};
#include "msg.h"
/* a specific parse entry */
struct templateEntry {
struct templateEntry *pNext;
enum EntryTypes eEntryType;
uchar *fieldName; /**< field name to be used for structured output */
int lenFieldName;
sbool bComplexProcessing; /**< set if complex processing (options, etc) is required */
union {
struct {
uchar *pConstant; /* pointer to constant value */
int iLenConstant; /* its length */
} constant;
struct {
msgPropDescr_t msgProp; /* property to be used */
unsigned iFromPos; /* for partial strings only chars from this position ... */
unsigned iToPos; /* up to that one... */
unsigned iFieldNr; /* for field extraction: field to extract */
#ifdef FEATURE_REGEXP
regex_t re; /* APR: this is the regular expression */
short has_regex;
short iMatchToUse;/* which match should be obtained (10 max) */
short iSubMatchToUse;/* which submatch should be obtained (10 max) */
enum tplRegexType typeRegex;
enum tlpRegexNoMatchType {
TPL_REGEX_NOMATCH_USE_DFLTSTR = 0, /* use the (old style) default "**NO MATCH**" string */
TPL_REGEX_NOMATCH_USE_BLANK = 1, /* use a blank string */
TPL_REGEX_NOMATCH_USE_WHOLE_FIELD = 2, /* use the full field contents that we were searching in*/
TPL_REGEX_NOMATCH_USE_ZERO = 3 /* use 0 (useful for numerical values) */
} nomatchAction; /**< what to do if we do not have a match? */
#endif
unsigned has_fields; /* support for field-counting: field to extract */
unsigned char field_delim; /* support for field-counting: field delemiter char */
#ifdef STRICT_GPLV3
int field_expand; /* use multiple instances of the field delimiter as a single one? */
#endif
enum tplFormatTypes eDateFormat;
enum tplFormatCaseConvTypes eCaseConv;
struct { /* bit fields! */
unsigned bDropCC: 1; /* drop control characters? */
unsigned bSpaceCC: 1; /* change control characters to spaceescape? */
unsigned bEscapeCC: 1; /* escape control characters? */
unsigned bDropLastLF: 1; /* drop last LF char in msg (PIX!) */
unsigned bSecPathDrop: 1; /* drop slashes, replace dots, empty string */
unsigned bSecPathReplace: 1; /* replace slashes, replace dots, empty string */
unsigned bSPIffNo1stSP: 1; /* be a space if 1st pos if field is no space*/
unsigned bCSV: 1; /* format field in CSV (RFC 4180) format */
unsigned bJSON: 1; /* format field JSON escaped */
unsigned bJSONf: 1; /* format field JSON *field* (n/v pair) */
unsigned bJSONr: 1; /* format field JSON non escaped */
unsigned bJSONfr: 1; /* format field JSON *field* non escaped (n/v pair) */
unsigned bMandatory: 1; /* mandatory field - emit even if empty */
unsigned bFromPosEndRelative: 1;/* is From/To-Pos relative to end of string? */
} options; /* options as bit fields */
} field;
} data;
};
/* interfaces */
BEGINinterface(tpl) /* name must also be changed in ENDinterface macro! */
ENDinterface(tpl)
#define tplCURR_IF_VERSION 1 /* increment whenever you change the interface structure! */
/* prototypes */
PROTOTYPEObj(tpl);
//struct template* tplConstruct(void);
struct template *tplAddLine(rsconf_t *conf, char* pName, unsigned char** pRestOfConfLine);
struct template *tplFind(rsconf_t *conf, char *pName, int iLenName);
int tplGetEntryCount(struct template *pTpl);
void tplDeleteAll(rsconf_t *conf);
void tplDeleteNew(rsconf_t *conf);
void tplPrintList(rsconf_t *conf);
void tplLastStaticInit(rsconf_t *conf, struct template *tpl);
rsRetVal ExtendBuf(actWrkrIParams_t *const iparam, const size_t iMinSize);
int tplRequiresDateCall(struct template *pTpl);
/* note: if a compiler warning for undefined type tells you to look at this
* code line below, the actual cause is that you currently MUST include template.h
* BEFORE msg.h, even if your code file does not actually need it.
* rgerhards, 2007-08-06
*/
rsRetVal tplToArray(struct template *pTpl, msg_t *pMsg, uchar*** ppArr, struct syslogTime *ttNow);
rsRetVal tplToJSON(struct template *pTpl, msg_t *pMsg, struct json_object **, struct syslogTime *ttNow);
rsRetVal doEscape(uchar **pp, rs_size_t *pLen, unsigned short *pbMustBeFreed, int escapeMode);
rsRetVal
tplToString(struct template *__restrict__ const pTpl,
msg_t *__restrict__ const pMsg,
actWrkrIParams_t *__restrict const iparam,
struct syslogTime *const ttNow);
rsRetVal templateInit();
rsRetVal tplProcessCnf(struct cnfobj *o);
#endif /* #ifndef TEMPLATE_H_INCLUDED */
/* vim:set ai:
*/