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/* glbl.c - this module holds global defintions and data items.
* These are shared among the runtime library. Their use should be
* limited to cases where it is actually needed. The main intension for
* implementing them was support for the transistion from v2 to v4
* (with fully modular design), but it turned out that there may also
* be some other good use cases besides backwards-compatibility.
*
* Module begun 2008-04-16 by Rainer Gerhards
*
* Copyright 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* The rsyslog runtime library is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The rsyslog runtime library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
*/
#include "config.h"
#include <stdlib.h>
#include <sys/socket.h>
#include <assert.h>
#include "rsyslog.h"
#include "obj.h"
#include "cfsysline.h"
#include "glbl.h"
/* static data */
DEFobjStaticHelpers
/* static data
* For this object, these variables are obviously what makes the "meat" of the
* class...
*/
static uchar *pszWorkDir = NULL;
static int iDefPFFamily = PF_UNSPEC; /* protocol family (IPv4, IPv6 or both) */
static int bDropMalPTRMsgs = 0;/* Drop messages which have malicious PTR records during DNS lookup */
static int option_DisallowWarning = 1; /* complain if message from disallowed sender is received */
static int bDisableDNS = 0; /* don't look up IP addresses of remote messages */
static uchar *LocalHostName = NULL;/* our hostname - read-only after startup */
static uchar *LocalDomain; /* our local domain name - read-only after startup */
static char **StripDomains = NULL;/* these domains may be stripped before writing logs - r/o after s.u., never touched by init */
static char **LocalHosts = NULL;/* these hosts are logged with their hostname - read-only after startup, never touched by init */
/* define a macro for the simple properties' set and get functions
* (which are always the same). This is only suitable for pretty
* simple cases which require neither checks nor memory allocation.
*/
#define SIMP_PROP(nameFunc, nameVar, dataType) \
SIMP_PROP_GET(nameFunc, nameVar, dataType) \
SIMP_PROP_SET(nameFunc, nameVar, dataType)
#define SIMP_PROP_SET(nameFunc, nameVar, dataType) \
static rsRetVal Set##nameFunc(dataType newVal) \
{ \
nameVar = newVal; \
return RS_RET_OK; \
}
#define SIMP_PROP_GET(nameFunc, nameVar, dataType) \
static dataType Get##nameFunc(void) \
{ \
return(nameVar); \
}
SIMP_PROP(DefPFFamily, iDefPFFamily, int) /* note that in the future we may check the family argument */
SIMP_PROP(DropMalPTRMsgs, bDropMalPTRMsgs, int)
SIMP_PROP(Option_DisallowWarning, option_DisallowWarning, int)
SIMP_PROP(DisableDNS, bDisableDNS, int)
SIMP_PROP(LocalDomain, LocalDomain, uchar*)
SIMP_PROP(StripDomains, StripDomains, char**)
SIMP_PROP(LocalHosts, LocalHosts, char**)
SIMP_PROP_SET(LocalHostName, LocalHostName, uchar*)
#undef SIMP_PROP
#undef SIMP_PROP_SET
#undef SIMP_PROP_GET
/* return our local hostname. if it is not set, "[localhost]" is returned
*/
static uchar*
GetLocalHostName(void)
{
return(LocalHostName == NULL ? (uchar*) "[localhost]" : LocalHostName);
}
/* return the current working directory.
*/
static uchar*
GetWorkDir(void)
{
return(pszWorkDir == NULL ? (uchar*) "" : pszWorkDir);
}
/* queryInterface function
* rgerhards, 2008-02-21
*/
BEGINobjQueryInterface(glbl)
CODESTARTobjQueryInterface(glbl)
if(pIf->ifVersion != glblCURR_IF_VERSION) { /* check for current version, increment on each change */
ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
}
/* ok, we have the right interface, so let's fill it
* Please note that we may also do some backwards-compatibility
* work here (if we can support an older interface version - that,
* of course, also affects the "if" above).
*/
pIf->GetWorkDir = GetWorkDir;
#define SIMP_PROP(name) \
pIf->Get##name = Get##name; \
pIf->Set##name = Set##name;
SIMP_PROP(DefPFFamily);
SIMP_PROP(DropMalPTRMsgs);
SIMP_PROP(Option_DisallowWarning);
SIMP_PROP(DisableDNS);
SIMP_PROP(LocalHostName)
SIMP_PROP(LocalDomain)
SIMP_PROP(StripDomains)
SIMP_PROP(LocalHosts)
#undef SIMP_PROP
finalize_it:
ENDobjQueryInterface(glbl)
/* Reset config variables to default values.
* rgerhards, 2008-04-17
*/
static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
{
if(pszWorkDir != NULL) {
free(pszWorkDir);
pszWorkDir = NULL;
}
bDropMalPTRMsgs = 0;
return RS_RET_OK;
}
/* Initialize the glbl class. Must be called as the very first method
* before anything else is called inside this class.
* rgerhards, 2008-02-19
*/
BEGINAbstractObjClassInit(glbl, 1, OBJ_IS_CORE_MODULE) /* class, version */
/* request objects we use */
/* register config handlers (TODO: we need to implement a way to unregister them) */
CHKiRet(regCfSysLineHdlr((uchar *)"workdirectory", 0, eCmdHdlrGetWord, NULL, &pszWorkDir, NULL));
CHKiRet(regCfSysLineHdlr((uchar *)"dropmsgswithmaliciousdnsptrrecords", 0, eCmdHdlrBinary, NULL, &bDropMalPTRMsgs, NULL));
CHKiRet(regCfSysLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, resetConfigVariables, NULL, NULL));
ENDObjClassInit(glbl)
/* Exit the glbl class.
* rgerhards, 2008-04-17
*/
BEGINObjClassExit(glbl, OBJ_IS_CORE_MODULE) /* class, version */
if(pszWorkDir != NULL)
free(pszWorkDir);
if(LocalHostName != NULL)
free(LocalHostName);
ENDObjClassExit(glbl)
/* vi:set ai:
*/
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