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template.c
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template.c
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/* This is the template processing code of rsyslog.
* begun 2004-11-17 rgerhards
*
* Copyright 2004-2012 Rainer Gerhards and Adiscon
*
* 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
*/
#include "config.h"
#include "rsyslog.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <json/json.h>
#include "stringbuf.h"
#include "syslogd-types.h"
#include "template.h"
#include "msg.h"
#include "dirty.h"
#include "obj.h"
#include "errmsg.h"
#include "strgen.h"
#include "rsconf.h"
#include "msg.h"
#include "unicode-helper.h"
/* static data */
DEFobjCurrIf(obj)
DEFobjCurrIf(errmsg)
DEFobjCurrIf(strgen)
/* tables for interfacing with the v6 config system */
static struct cnfparamdescr cnfparamdescr[] = {
{ "name", eCmdHdlrString, 1 },
{ "type", eCmdHdlrString, 1 },
{ "string", eCmdHdlrString, 0 },
{ "plugin", eCmdHdlrString, 0 },
{ "subtree", eCmdHdlrString, 0 },
{ "option.stdsql", eCmdHdlrBinary, 0 },
{ "option.sql", eCmdHdlrBinary, 0 },
{ "option.json", eCmdHdlrBinary, 0 }
};
static struct cnfparamblk pblk =
{ CNFPARAMBLK_VERSION,
sizeof(cnfparamdescr)/sizeof(struct cnfparamdescr),
cnfparamdescr
};
static struct cnfparamdescr cnfparamdescrProperty[] = {
{ "name", eCmdHdlrString, 1 },
{ "outname", eCmdHdlrString, 0 },
{ "dateformat", eCmdHdlrString, 0 },
{ "caseconversion", eCmdHdlrString, 0 },
{ "controlcharacters", eCmdHdlrString, 0 },
{ "securepath", eCmdHdlrString, 0 },
{ "format", eCmdHdlrString, 0 },
{ "position.from", eCmdHdlrInt, 0 },
{ "position.to", eCmdHdlrInt, 0 },
{ "field.number", eCmdHdlrInt, 0 },
{ "field.delimiter", eCmdHdlrInt, 0 },
{ "regex.expression", eCmdHdlrString, 0 },
{ "regex.type", eCmdHdlrString, 0 },
{ "regex.nomatchmode", eCmdHdlrString, 0 },
{ "regex.match", eCmdHdlrInt, 0 },
{ "regex.submatch", eCmdHdlrInt, 0 },
{ "droplastlf", eCmdHdlrBinary, 0 },
{ "mandatory", eCmdHdlrBinary, 0 },
{ "spifno1stsp", eCmdHdlrBinary, 0 }
};
static struct cnfparamblk pblkProperty =
{ CNFPARAMBLK_VERSION,
sizeof(cnfparamdescrProperty)/sizeof(struct cnfparamdescr),
cnfparamdescrProperty
};
static struct cnfparamdescr cnfparamdescrConstant[] = {
{ "value", eCmdHdlrString, 1 },
{ "outname", eCmdHdlrString, 0 },
};
static struct cnfparamblk pblkConstant =
{ CNFPARAMBLK_VERSION,
sizeof(cnfparamdescrConstant)/sizeof(struct cnfparamdescr),
cnfparamdescrConstant
};
#ifdef FEATURE_REGEXP
DEFobjCurrIf(regexp)
static int bFirstRegexpErrmsg = 1; /**< did we already do a "can't load regexp" error message? */
#endif
/* helper to tplToString and strgen's, extends buffer */
#define ALLOC_INC 128
rsRetVal
ExtendBuf(uchar **pBuf, size_t *pLenBuf, size_t iMinSize)
{
uchar *pNewBuf;
size_t iNewSize;
DEFiRet;
iNewSize = (iMinSize / ALLOC_INC + 1) * ALLOC_INC;
CHKmalloc(pNewBuf = (uchar*) realloc(*pBuf, iNewSize));
*pBuf = pNewBuf;
*pLenBuf = iNewSize;
finalize_it:
RETiRet;
}
/* This functions converts a template into a string.
*
* The function takes a pointer to a template and a pointer to a msg object
* as well as a pointer to an output buffer and its size. Note that the output
* buffer pointer may be NULL, size 0, in which case a new one is allocated.
* The outpub buffer is grown as required. It is the caller's duty to free the
* buffer when it is done. Note that it is advisable to reuse memory, as this
* offers big performance improvements.
* rewritten 2009-06-19 rgerhards
*/
rsRetVal
tplToString(struct template *pTpl, msg_t *pMsg, uchar **ppBuf, size_t *pLenBuf,
struct syslogTime *ttNow)
{
DEFiRet;
struct templateEntry *pTpe;
size_t iBuf;
unsigned short bMustBeFreed = 0;
uchar *pVal;
rs_size_t iLenVal = 0;
assert(pTpl != NULL);
assert(pMsg != NULL);
assert(ppBuf != NULL);
assert(pLenBuf != NULL);
if(pTpl->pStrgen != NULL) {
CHKiRet(pTpl->pStrgen(pMsg, ppBuf, pLenBuf));
FINALIZE;
}
if(pTpl->subtree != NULL) {
/* only a single CEE subtree must be provided */
/* note: we could optimize the code below, however, this is
* not worth the effort, as this passing mode is not expected
* in subtree mode and so most probably only used for debug & test.
*/
getCEEPropVal(pMsg, pTpl->subtree, &pVal, &iLenVal, &bMustBeFreed);
if(iLenVal >= (rs_size_t)*pLenBuf) /* we reserve one char for the final \0! */
CHKiRet(ExtendBuf(ppBuf, pLenBuf, iLenVal + 1));
memcpy(*ppBuf, pVal, iLenVal+1);
if(bMustBeFreed)
free(pVal);
FINALIZE;
}
/* we have a "regular" template with template entries */
/* loop through the template. We obtain one value
* and copy it over to our dynamic string buffer. Then, we
* free the obtained value (if requested). We continue this
* loop until we got hold of all values.
*/
pTpe = pTpl->pEntryRoot;
iBuf = 0;
while(pTpe != NULL) {
if(pTpe->eEntryType == CONSTANT) {
pVal = (uchar*) pTpe->data.constant.pConstant;
iLenVal = pTpe->data.constant.iLenConstant;
bMustBeFreed = 0;
} else if(pTpe->eEntryType == FIELD) {
pVal = (uchar*) MsgGetProp(pMsg, pTpe, pTpe->data.field.propid,
pTpe->data.field.propName, &iLenVal,
&bMustBeFreed, ttNow);
/* we now need to check if we should use SQL option. In this case,
* we must go over the generated string and escape '\'' characters.
* rgerhards, 2005-09-22: the option values below look somewhat misplaced,
* but they are handled in this way because of legacy (don't break any
* existing thing).
*/
if(pTpl->optFormatEscape == SQL_ESCAPE)
doEscape(&pVal, &iLenVal, &bMustBeFreed, SQL_ESCAPE);
else if(pTpl->optFormatEscape == JSON_ESCAPE)
doEscape(&pVal, &iLenVal, &bMustBeFreed, JSON_ESCAPE);
else if(pTpl->optFormatEscape == STDSQL_ESCAPE)
doEscape(&pVal, &iLenVal, &bMustBeFreed, STDSQL_ESCAPE);
}
/* got source, now copy over */
if(iLenVal > 0) { /* may be zero depending on property */
/* first, make sure buffer fits */
if(iBuf + iLenVal >= *pLenBuf) /* we reserve one char for the final \0! */
CHKiRet(ExtendBuf(ppBuf, pLenBuf, iBuf + iLenVal + 1));
memcpy(*ppBuf + iBuf, pVal, iLenVal);
iBuf += iLenVal;
}
if(bMustBeFreed)
free(pVal);
pTpe = pTpe->pNext;
}
if(iBuf == *pLenBuf) {
/* in the weired case of an *empty* template, this can happen.
* it is debatable if we should really fix it here or simply
* forbid that case. However, performance toll is minimal, so
* I tend to permit it. -- 201011-05 rgerhards
*/
CHKiRet(ExtendBuf(ppBuf, pLenBuf, iBuf + 1));
}
(*ppBuf)[iBuf] = '\0';
finalize_it:
RETiRet;
}
/* This functions converts a template into an array of strings.
* For further general details, see the very similar funtion
* tpltoString().
* Instead of a string, an array of string pointers is returned by
* thus function. The caller is repsonsible for destroying that array as
* well as all of its elements. The array is of fixed size. It's end
* is indicated by a NULL pointer.
* rgerhards, 2009-04-03
*/
rsRetVal
tplToArray(struct template *pTpl, msg_t *pMsg, uchar*** ppArr, struct syslogTime *ttNow)
{
DEFiRet;
struct templateEntry *pTpe;
uchar **pArr;
int iArr;
rs_size_t propLen;
unsigned short bMustBeFreed;
uchar *pVal;
assert(pTpl != NULL);
assert(pMsg != NULL);
assert(ppArr != NULL);
if(pTpl->subtree) {
/* Note: this mode is untested, as there is no official plugin
* using array passing, so I simply could not test it.
*/
CHKmalloc(pArr = calloc(2, sizeof(uchar*)));
getCEEPropVal(pMsg, pTpl->subtree, &pVal, &propLen, &bMustBeFreed);
if(bMustBeFreed) { /* if it must be freed, it is our own private copy... */
pArr[0] = pVal; /* ... so we can use it! */
} else {
CHKmalloc(pArr[0] = (uchar*)strdup((char*) pVal));
}
FINALIZE;
}
/* loop through the template. We obtain one value, create a
* private copy (if necessary), add it to the string array
* and then on to the next until we have processed everything.
*/
CHKmalloc(pArr = calloc(pTpl->tpenElements + 1, sizeof(uchar*)));
iArr = 0;
pTpe = pTpl->pEntryRoot;
while(pTpe != NULL) {
if(pTpe->eEntryType == CONSTANT) {
CHKmalloc(pArr[iArr] = (uchar*)strdup((char*) pTpe->data.constant.pConstant));
} else if(pTpe->eEntryType == FIELD) {
pVal = (uchar*) MsgGetProp(pMsg, pTpe, pTpe->data.field.propid,
pTpe->data.field.propName, &propLen,
&bMustBeFreed, ttNow);
if(bMustBeFreed) { /* if it must be freed, it is our own private copy... */
pArr[iArr] = pVal; /* ... so we can use it! */
} else {
CHKmalloc(pArr[iArr] = (uchar*)strdup((char*) pVal));
}
}
iArr++;
pTpe = pTpe->pNext;
}
finalize_it:
*ppArr = (iRet == RS_RET_OK) ? pArr : NULL;
RETiRet;
}
/* This functions converts a template into a json object.
* For further general details, see the very similar funtion
* tpltoString().
* rgerhards, 2012-08-29
*/
rsRetVal
tplToJSON(struct template *pTpl, msg_t *pMsg, struct json_object **pjson, struct syslogTime *ttNow)
{
struct templateEntry *pTpe;
rs_size_t propLen;
unsigned short bMustBeFreed;
uchar *pVal;
struct json_object *json, *jsonf;
rsRetVal localRet;
DEFiRet;
if(pTpl->subtree != NULL){
localRet = jsonFind(pMsg, pTpl->subtree, pjson);
if(*pjson == NULL) {
/* we need to have a root object! */
*pjson = json_object_new_object();
} else {
json_object_get(*pjson); /* inc refcount */
}
FINALIZE;
}
json = json_object_new_object();
for(pTpe = pTpl->pEntryRoot ; pTpe != NULL ; pTpe = pTpe->pNext) {
if(pTpe->eEntryType == CONSTANT) {
if(pTpe->fieldName == NULL)
continue;
jsonf = json_object_new_string((char*) pTpe->data.constant.pConstant);
json_object_object_add(json, (char*)pTpe->fieldName, jsonf);
} else if(pTpe->eEntryType == FIELD) {
if(pTpe->data.field.propid == PROP_CEE) {
localRet = msgGetCEEPropJSON(pMsg, pTpe->data.field.propName, &jsonf);
if(localRet == RS_RET_OK) {
json_object_object_add(json, (char*)pTpe->fieldName, json_object_get(jsonf));
} else {
DBGPRINTF("tplToJSON: error %d looking up property\n",
localRet);
if(pTpe->data.field.options.bMandatory) {
json_object_object_add(json, (char*)pTpe->fieldName, NULL);
}
}
} else {
pVal = (uchar*) MsgGetProp(pMsg, pTpe, pTpe->data.field.propid,
pTpe->data.field.propName, &propLen,
&bMustBeFreed, ttNow);
if(pTpe->data.field.options.bMandatory || propLen > 0) {
jsonf = json_object_new_string_len((char*)pVal, propLen);
json_object_object_add(json, (char*)pTpe->fieldName, jsonf);
}
if(bMustBeFreed) { /* json-c makes its own private copy! */
free(pVal);
}
}
}
}
*pjson = (iRet == RS_RET_OK) ? json : NULL;
finalize_it:
RETiRet;
}
/* Helper to doEscape. This is called if doEscape
* runs out of memory allocating the escaped string.
* Then we are in trouble. We can
* NOT simply return the unmodified string because this
* may cause SQL injection. But we also can not simply
* abort the run, this would be a DoS. I think an appropriate
* measure is to remove the dangerous \' characters (SQL). We
* replace them by \", which will break the message and
* signatures eventually present - but this is the
* best thing we can do now (or does anybody
* have a better idea?). rgerhards 2004-11-23
* added support for escape mode (see doEscape for details).
* if mode = SQL_ESCAPE, then backslashes are changed to slashes.
* rgerhards 2005-09-22
*/
static void doEmergencyEscape(register uchar *p, int mode)
{
while(*p) {
if((mode == SQL_ESCAPE||mode == STDSQL_ESCAPE) && *p == '\'')
*p = '"';
else if((mode == JSON_ESCAPE) && *p == '"')
*p = '\'';
else if((mode == SQL_ESCAPE) && *p == '\\')
*p = '/';
++p;
}
}
/* SQL-Escape a string. Single quotes are found and
* replaced by two of them. A new buffer is allocated
* for the provided string and the provided buffer is
* freed. The length is updated. Parameter pbMustBeFreed
* is set to 1 if a new buffer is allocated. Otherwise,
* it is left untouched.
* --
* We just discovered a security issue. MySQL is so
* "smart" to not only support the standard SQL mechanism
* for escaping quotes, but to also provide its own (using
* c-type syntax with backslashes). As such, it is actually
* possible to do sql injection via rsyslogd. The cure is now
* to escape backslashes, too. As we have found on the web, some
* other databases seem to be similar "smart" (why do we have standards
* at all if they are violated without any need???). Even better, MySQL's
* smartness depends on config settings. So we add a new option to this
* function that allows the caller to select if they want to standard or
* "smart" encoding ;)
* --
* Parameter "mode" is STDSQL_ESCAPE, SQL_ESCAPE "smart" SQL engines, or
* JSON_ESCAPE for everyone requiring escaped JSON (e.g. ElasticSearch).
* 2005-09-22 rgerhards
*/
rsRetVal
doEscape(uchar **pp, rs_size_t *pLen, unsigned short *pbMustBeFreed, int mode)
{
DEFiRet;
uchar *p = NULL;
int iLen;
cstr_t *pStrB = NULL;
uchar *pszGenerated;
assert(pp != NULL);
assert(*pp != NULL);
assert(pLen != NULL);
assert(pbMustBeFreed != NULL);
/* first check if we need to do anything at all... */
if(mode == STDSQL_ESCAPE)
for(p = *pp ; *p && *p != '\'' ; ++p)
;
else if(mode == SQL_ESCAPE)
for(p = *pp ; *p && *p != '\'' && *p != '\\' ; ++p)
;
else if(mode == JSON_ESCAPE)
for(p = *pp ; *p && *p != '"' ; ++p)
;
/* when we get out of the loop, we are either at the
* string terminator or the first character to escape */
if(p && *p == '\0')
FINALIZE; /* nothing to do in this case! */
p = *pp;
iLen = *pLen;
CHKiRet(cstrConstruct(&pStrB));
while(*p) {
if((mode == SQL_ESCAPE || mode == STDSQL_ESCAPE) && *p == '\'') {
CHKiRet(cstrAppendChar(pStrB, (mode == STDSQL_ESCAPE) ? '\'' : '\\'));
iLen++; /* reflect the extra character */
} else if((mode == SQL_ESCAPE) && *p == '\\') {
CHKiRet(cstrAppendChar(pStrB, '\\'));
iLen++; /* reflect the extra character */
} else if((mode == JSON_ESCAPE) && *p == '"') {
CHKiRet(cstrAppendChar(pStrB, '\\'));
iLen++; /* reflect the extra character */
}
CHKiRet(cstrAppendChar(pStrB, *p));
++p;
}
CHKiRet(cstrFinalize(pStrB));
CHKiRet(cstrConvSzStrAndDestruct(pStrB, &pszGenerated, 0));
if(*pbMustBeFreed)
free(*pp); /* discard previous value */
*pp = pszGenerated;
*pLen = iLen;
*pbMustBeFreed = 1;
finalize_it:
if(iRet != RS_RET_OK) {
doEmergencyEscape(*pp, mode);
if(pStrB != NULL)
cstrDestruct(&pStrB);
}
RETiRet;
}
/* Constructs a template entry object. Returns pointer to it
* or NULL (if it fails). Pointer to associated template list entry
* must be provided.
*/
struct templateEntry* tpeConstruct(struct template *pTpl)
{
struct templateEntry *pTpe;
assert(pTpl != NULL);
if((pTpe = calloc(1, sizeof(struct templateEntry))) == NULL)
return NULL;
/* basic initialization is done via calloc() - need to
* initialize only values != 0. */
if(pTpl->pEntryLast == NULL){
/* we are the first element! */
pTpl->pEntryRoot = pTpl->pEntryLast = pTpe;
} else {
pTpl->pEntryLast->pNext = pTpe;
pTpl->pEntryLast = pTpe;
}
pTpl->tpenElements++;
return(pTpe);
}
/* Constructs a template list object. Returns pointer to it
* or NULL (if it fails).
*/
static struct template*
tplConstruct(rsconf_t *conf)
{
struct template *pTpl;
if((pTpl = calloc(1, sizeof(struct template))) == NULL)
return NULL;
/* basic initialisation is done via calloc() - need to
* initialize only values != 0. */
if(conf->templates.last == NULL) {
/* we are the first element! */
conf->templates.root = conf->templates.last = pTpl;
} else {
conf->templates.last->pNext = pTpl;
conf->templates.last = pTpl;
}
return(pTpl);
}
/* helper to tplAddLine. Parses a constant and generates
* the necessary structure.
* Paramter "bDoEscapes" is to support legacy vs. v6+ config system. In
* legacy, we must do escapes ourselves, whereas v6+ passes in already
* escaped strings (which we are NOT permitted to further escape, this would
* cause invalid result strings!). Note: if escapes are not permitted,
* quotes (") are just a regular character and do NOT terminate the constant!
*/
static rsRetVal
do_Constant(unsigned char **pp, struct template *pTpl, int bDoEscapes)
{
register unsigned char *p;
cstr_t *pStrB;
struct templateEntry *pTpe;
int i;
DEFiRet;
assert(pp != NULL);
assert(*pp != NULL);
assert(pTpl != NULL);
p = *pp;
CHKiRet(cstrConstruct(&pStrB));
/* process the message and expand escapes
* (additional escapes can be added here if needed)
*/
while(*p && *p != '%' && !(bDoEscapes && *p == '\"')) {
if(bDoEscapes && *p == '\\') {
switch(*++p) {
case '\0':
/* the best we can do - it's invalid anyhow... */
cstrAppendChar(pStrB, *p);
break;
case 'n':
cstrAppendChar(pStrB, '\n');
++p;
break;
case 'r':
cstrAppendChar(pStrB, '\r');
++p;
break;
case '\\':
cstrAppendChar(pStrB, '\\');
++p;
break;
case '%':
cstrAppendChar(pStrB, '%');
++p;
break;
case '0': /* numerical escape sequence */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
i = 0;
while(*p && isdigit((int)*p)) {
i = i * 10 + *p++ - '0';
}
cstrAppendChar(pStrB, i);
break;
default:
cstrAppendChar(pStrB, *p++);
break;
}
}
else
cstrAppendChar(pStrB, *p++);
}
if((pTpe = tpeConstruct(pTpl)) == NULL) {
rsCStrDestruct(&pStrB);
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
pTpe->eEntryType = CONSTANT;
cstrFinalize(pStrB);
/* We obtain the length from the counted string object
* (before we delete it). Later we might take additional
* benefit from the counted string object.
* 2005-09-09 rgerhards
*/
pTpe->data.constant.iLenConstant = rsCStrLen(pStrB);
CHKiRet(cstrConvSzStrAndDestruct(pStrB, &pTpe->data.constant.pConstant, 0));
*pp = p;
finalize_it:
RETiRet;
}
/* Helper to do_Parameter(). This parses the formatting options
* specified in a template variable. It returns the passed-in pointer
* updated to the next processed character.
*/
static void doOptions(unsigned char **pp, struct templateEntry *pTpe)
{
register unsigned char *p;
unsigned char Buf[64];
size_t i;
assert(pp != NULL);
assert(*pp != NULL);
assert(pTpe != NULL);
p = *pp;
while(*p && *p != '%' && *p != ':') {
/* outer loop - until end of options */
i = 0;
while((i < sizeof(Buf) / sizeof(char)) &&
*p && *p != '%' && *p != ':' && *p != ',') {
/* inner loop - until end of ONE option */
Buf[i++] = tolower((int)*p);
++p;
}
Buf[i] = '\0'; /* terminate */
/* check if we need to skip oversize option */
while(*p && *p != '%' && *p != ':' && *p != ',')
++p; /* just skip */
if(*p == ',')
++p; /* eat ',' */
/* OK, we got the option, so now lets look what
* it tells us...
*/
if(!strcmp((char*)Buf, "date-mysql")) {
pTpe->data.field.eDateFormat = tplFmtMySQLDate;
} else if(!strcmp((char*)Buf, "date-pgsql")) {
pTpe->data.field.eDateFormat = tplFmtPgSQLDate;
} else if(!strcmp((char*)Buf, "date-rfc3164")) {
pTpe->data.field.eDateFormat = tplFmtRFC3164Date;
} else if(!strcmp((char*)Buf, "date-rfc3164-buggyday")) {
pTpe->data.field.eDateFormat = tplFmtRFC3164BuggyDate;
} else if(!strcmp((char*)Buf, "date-rfc3339")) {
pTpe->data.field.eDateFormat = tplFmtRFC3339Date;
} else if(!strcmp((char*)Buf, "date-unixtimestamp")) {
pTpe->data.field.eDateFormat = tplFmtUnixDate;
} else if(!strcmp((char*)Buf, "date-subseconds")) {
pTpe->data.field.eDateFormat = tplFmtSecFrac;
} else if(!strcmp((char*)Buf, "lowercase")) {
pTpe->data.field.eCaseConv = tplCaseConvLower;
} else if(!strcmp((char*)Buf, "uppercase")) {
pTpe->data.field.eCaseConv = tplCaseConvUpper;
} else if(!strcmp((char*)Buf, "sp-if-no-1st-sp")) {
pTpe->data.field.options.bSPIffNo1stSP = 1;
} else if(!strcmp((char*)Buf, "escape-cc")) {
pTpe->data.field.options.bEscapeCC = 1;
} else if(!strcmp((char*)Buf, "drop-cc")) {
pTpe->data.field.options.bDropCC = 1;
} else if(!strcmp((char*)Buf, "space-cc")) {
pTpe->data.field.options.bSpaceCC = 1;
} else if(!strcmp((char*)Buf, "drop-last-lf")) {
pTpe->data.field.options.bDropLastLF = 1;
} else if(!strcmp((char*)Buf, "secpath-drop")) {
pTpe->data.field.options.bSecPathDrop = 1;
} else if(!strcmp((char*)Buf, "secpath-replace")) {
pTpe->data.field.options.bSecPathReplace = 1;
} else if(!strcmp((char*)Buf, "csv")) {
if(pTpe->data.field.options.bJSON || pTpe->data.field.options.bJSONf) {
errmsg.LogError(0, NO_ERRCODE, "error: can only specify "
"one option out of (json, jsonf, csv) - csv ignored");
} else {
pTpe->data.field.options.bCSV = 1;
}
} else if(!strcmp((char*)Buf, "json")) {
if(pTpe->data.field.options.bCSV || pTpe->data.field.options.bJSON) {
errmsg.LogError(0, NO_ERRCODE, "error: can only specify "
"one option out of (json, jsonf, csv) - json ignored");
} else {
pTpe->data.field.options.bJSON = 1;
}
} else if(!strcmp((char*)Buf, "jsonf")) {
if(pTpe->data.field.options.bCSV || pTpe->data.field.options.bJSON) {
errmsg.LogError(0, NO_ERRCODE, "error: can only specify "
"one option out of (json, jsonf, csv) - jsonf ignored");
} else {
pTpe->data.field.options.bJSONf = 1;
}
} else if(!strcmp((char*)Buf, "mandatory-field")) {
pTpe->data.field.options.bMandatory = 1;
} else {
errmsg.LogError(0, NO_ERRCODE, "template error: invalid field option '%s' "
"specified - ignored", Buf);
}
}
*pp = p;
}
/* helper to tplAddLine. Parses a parameter and generates
* the necessary structure.
*/
static rsRetVal
do_Parameter(uchar **pp, struct template *pTpl)
{
uchar *p;
cstr_t *pStrProp;
cstr_t *pStrField = NULL;
struct templateEntry *pTpe;
int iNum; /* to compute numbers */
#ifdef FEATURE_REGEXP
/* APR: variables for regex */
rsRetVal iRetLocal;
int longitud;
unsigned char *regex_char;
unsigned char *regex_end;
#endif
DEFiRet;
assert(pp != NULL);
assert(*pp != NULL);
assert(pTpl != NULL);
p = (uchar*) *pp;
CHKiRet(cstrConstruct(&pStrProp));
CHKmalloc(pTpe = tpeConstruct(pTpl));
pTpe->eEntryType = FIELD;
while(*p && *p != '%' && *p != ':') {
cstrAppendChar(pStrProp, tolower(*p));
++p; /* do NOT do this in tolower()! */
}
/* got the name */
cstrFinalize(pStrProp);
if(propNameToID(pStrProp, &pTpe->data.field.propid) != RS_RET_OK) {
errmsg.LogError(0, RS_RET_TPL_INVLD_PROP, "template '%s': invalid parameter '%s'",
pTpl->pszName, cstrGetSzStrNoNULL(pStrProp));
cstrDestruct(&pStrProp);
ABORT_FINALIZE(RS_RET_TPL_INVLD_PROP);
}
if(pTpe->data.field.propid == PROP_CEE) {
/* in CEE case, we need to preserve the actual property name */
if((pTpe->data.field.propName = es_newStrFromCStr((char*)cstrGetSzStrNoNULL(pStrProp)+1, cstrLen(pStrProp)-1)) == NULL) {
cstrDestruct(&pStrProp);
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
}
/* Check frompos, if it has an R, then topos should be a regex */
if(*p == ':') {
pTpe->bComplexProcessing = 1;
++p; /* eat ':' */
#ifdef FEATURE_REGEXP
if(*p == 'R') {
/* APR: R found! regex alarm ! :) */
++p; /* eat ':' */
/* first come the regex type */
if(*p == ',') {
++p; /* eat ',' */
if(p[0] == 'B' && p[1] == 'R' && p[2] == 'E' && (p[3] == ',' || p[3] == ':')) {
pTpe->data.field.typeRegex = TPL_REGEX_BRE;
p += 3; /* eat indicator sequence */
} else if(p[0] == 'E' && p[1] == 'R' && p[2] == 'E' && (p[3] == ',' || p[3] == ':')) {
pTpe->data.field.typeRegex = TPL_REGEX_ERE;
p += 3; /* eat indicator sequence */
} else {
errmsg.LogError(0, NO_ERRCODE, "error: invalid regular expression type, rest of line %s",
(char*) p);
}
}
/* now check for submatch ID */
pTpe->data.field.iSubMatchToUse = 0;
if(*p == ',') {
/* in this case a number follows, which indicates which match
* shall be used. This must be a single digit.
*/
++p; /* eat ',' */
if(isdigit((int) *p)) {
pTpe->data.field.iSubMatchToUse = *p - '0';
++p; /* eat digit */
}
}
/* now pull what to do if we do not find a match */
if(*p == ',') {
++p; /* eat ',' */
if(p[0] == 'D' && p[1] == 'F' && p[2] == 'L' && p[3] == 'T'
&& (p[4] == ',' || p[4] == ':')) {
pTpe->data.field.nomatchAction = TPL_REGEX_NOMATCH_USE_DFLTSTR;
p += 4; /* eat indicator sequence */
} else if(p[0] == 'B' && p[1] == 'L' && p[2] == 'A' && p[3] == 'N' && p[4] == 'K'
&& (p[5] == ',' || p[5] == ':')) {
pTpe->data.field.nomatchAction = TPL_REGEX_NOMATCH_USE_BLANK;
p += 5; /* eat indicator sequence */
} else if(p[0] == 'F' && p[1] == 'I' && p[2] == 'E' && p[3] == 'L' && p[4] == 'D'
&& (p[5] == ',' || p[5] == ':')) {
pTpe->data.field.nomatchAction = TPL_REGEX_NOMATCH_USE_WHOLE_FIELD;
p += 5; /* eat indicator sequence */
} else if(p[0] == 'Z' && p[1] == 'E' && p[2] == 'R' && p[3] == 'O'
&& (p[4] == ',' || p[4] == ':')) {
pTpe->data.field.nomatchAction = TPL_REGEX_NOMATCH_USE_ZERO;
p += 4; /* eat indicator sequence */
} else if(p[0] == ',') { /* empty, use default */
pTpe->data.field.nomatchAction = TPL_REGEX_NOMATCH_USE_DFLTSTR;
/* do NOT eat indicator sequence, as this was already eaten - the
* comma itself is already part of the next field.
*/
} else {
errmsg.LogError(0, NO_ERRCODE, "template %s error: invalid regular expression type, rest of line %s",
pTpl->pszName, (char*) p);
}
}
/* now check for match ID */
pTpe->data.field.iMatchToUse = 0;
if(*p == ',') {
/* in this case a number follows, which indicates which match
* shall be used. This must be a single digit.
*/
++p; /* eat ',' */
if(isdigit((int) *p)) {
pTpe->data.field.iMatchToUse = *p - '0';
++p; /* eat digit */
}
}
if(*p != ':') {
/* There is something more than an R , this is invalid ! */
/* Complain on extra characters */
errmsg.LogError(0, NO_ERRCODE, "error: invalid character in frompos after \"R\", property: '%%%s'",
(char*) *pp);
} else {
pTpe->data.field.has_regex = 1;
dbgprintf("we have a regexp and use match #%d, submatch #%d\n",
pTpe->data.field.iMatchToUse, pTpe->data.field.iSubMatchToUse);
}
} else {
/* now we fall through the "regular" FromPos code */
#endif /* #ifdef FEATURE_REGEXP */
if(*p == 'F') {
#ifdef STRICT_GPLV3
pTpe->data.field.field_expand = 0;
#endif
/* we have a field counter, so indicate it in the template */
++p; /* eat 'F' */
if (*p == ':') {
/* no delimiter specified, so use the default (HT) */
pTpe->data.field.has_fields = 1;
pTpe->data.field.field_delim = 9;
} else if (*p == ',') {
++p; /* eat ',' */
/* configured delimiter follows, so we need to obtain
* it. Important: the following number must be the
* **DECIMAL** ASCII value of the delimiter character.
*/
pTpe->data.field.has_fields = 1;
if(!isdigit((int)*p)) {
/* complain and use default */
errmsg.LogError(0, NO_ERRCODE, "error: invalid character in frompos after \"F,\", property: '%%%s' - using 9 (HT) as field delimiter",
(char*) *pp);
pTpe->data.field.field_delim = 9;
} else {
iNum = 0;
while(isdigit((int)*p))
iNum = iNum * 10 + *p++ - '0';
if(iNum < 0 || iNum > 255) {
errmsg.LogError(0, NO_ERRCODE, "error: non-USASCII delimiter character value %d in template - using 9 (HT) as substitute", iNum);
pTpe->data.field.field_delim = 9;
} else {
pTpe->data.field.field_delim = iNum;
# ifdef STRICT_GPLV3
if (*p == '+') {
pTpe->data.field.field_expand = 1;
p ++;
}
# endif
if(*p == ',') { /* real fromPos? */
++p;
iNum = 0;
while(isdigit((int)*p))
iNum = iNum * 10 + *p++ - '0';
pTpe->data.field.iFromPos = iNum;
}
}
}
} else {
/* invalid character after F, so we need to reject
* this.
*/
errmsg.LogError(0, NO_ERRCODE, "error: invalid character in frompos after \"F\", property: '%%%s'",
(char*) *pp);
}
} else {
/* we now have a simple offset in frompos (the previously "normal" case) */
iNum = 0;
while(isdigit((int)*p))
iNum = iNum * 10 + *p++ - '0';
pTpe->data.field.iFromPos = iNum;
/* skip to next known good */
while(*p && *p != '%' && *p != ':') {
/* TODO: complain on extra characters */
dbgprintf("error: extra character in frompos: '%s'\n", p);
++p;
}
}
#ifdef FEATURE_REGEXP
}
#endif /* #ifdef FEATURE_REGEXP */
}
/* check topos (holds an regex if FromPos is "R"*/
if(*p == ':') {
++p; /* eat ':' */
#ifdef FEATURE_REGEXP
if (pTpe->data.field.has_regex) {
dbgprintf("debug: has regex \n");
/* APR 2005-09 I need the string that represent the regex */
/* The regex end is: "--end" */
/* TODO : this is hardcoded and cant be escaped, please change */
regex_end = (unsigned char*) strstr((char*)p, "--end");
if (regex_end == NULL) {
dbgprintf("error: can not find regex end in: '%s'\n", p);
pTpe->data.field.has_regex = 0;
} else {
/* We get here ONLY if the regex end was found */
longitud = regex_end - p;
/* Malloc for the regex string */
regex_char = (unsigned char *) MALLOC(longitud + 1);
if(regex_char == NULL) {
dbgprintf("Could not allocate memory for template parameter!\n");
pTpe->data.field.has_regex = 0;
ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
}
/* Get the regex string for compiling later */
memcpy(regex_char, p, longitud);
regex_char[longitud] = '\0';
dbgprintf("debug: regex detected: '%s'\n", regex_char);
/* Now i compile the regex */
/* Remember that the re is an attribute of the Template entry */
if((iRetLocal = objUse(regexp, LM_REGEXP_FILENAME)) == RS_RET_OK) {
int iOptions;
iOptions = (pTpe->data.field.typeRegex == TPL_REGEX_ERE) ? REG_EXTENDED : 0;
if(regexp.regcomp(&(pTpe->data.field.re), (char*) regex_char, iOptions) != 0) {
dbgprintf("error: can not compile regex: '%s'\n", regex_char);
pTpe->data.field.has_regex = 2;
}
} else {