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/* netstrms.c
*
* Work on this module begung 2008-04-23 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 <assert.h>
#include <errno.h>
#include "rsyslog.h"
#include "module-template.h"
#include "obj.h"
//#include "errmsg.h"
//#include "net.h"
#include "nsd.h"
#include "netstrm.h"
#include "netstrms.h"
MODULE_TYPE_LIB
/* static data */
DEFobjStaticHelpers
//DEFobjCurrIf(errmsg)
DEFobjCurrIf(glbl)
DEFobjCurrIf(netstrm)
//DEFobjCurrIf(net)
/* load our low-level driver. This must be done before any
* driver-specific functions (allmost all...) can be carried
* out. Note that the driver's .ifIsLoaded is correctly
* initialized by calloc() and we depend on that.
* rgerhards, 2008-04-18
*/
static rsRetVal
loadDrvr(netstrms_t *pThis)
{
uchar *pDrvrName;
DEFiRet;
pDrvrName = pThis->pDrvrName;
if(pDrvrName == NULL) /* if no drvr name is set, use system default */
pDrvrName = glbl.GetDfltNetstrmDrvr();
pThis->Drvr.ifVersion = nsdCURR_IF_VERSION;
/* The pDrvrName+2 below is a hack to obtain the object name. It
* safes us to have yet another variable with the name without "lm" in
* front of it. If we change the module load interface, we may re-think
* about this hack, but for the time being it is efficient and clean
* enough. -- rgerhards, 2008-04-18
*/
CHKiRet(obj.UseObj(__FILE__, pDrvrName+2, pDrvrName, (void*) &pThis->Drvr));
finalize_it:
RETiRet;
}
/* Standard-Constructor */
BEGINobjConstruct(netstrms) /* be sure to specify the object type also in END macro! */
ENDobjConstruct(netstrms)
/* destructor for the netstrms object */
BEGINobjDestruct(netstrms) /* be sure to specify the object type also in END and CODESTART macros! */
CODESTARTobjDestruct(netstrms)
if(pThis->pDrvrName != NULL)
free(pThis->pDrvrName);
ENDobjDestruct(netstrms)
/* ConstructionFinalizer */
static rsRetVal
netstrmsConstructFinalize(netstrms_t *pThis)
{
DEFiRet;
ISOBJ_TYPE_assert(pThis, netstrms);
CHKiRet(loadDrvr(pThis));
finalize_it:
RETiRet;
}
/* create an instance of a netstrm object. It is initialized with default
* values. The current driver is used. The caller may set netstrm properties
* and must call ConstructFinalize().
*/
static rsRetVal
CreateStrm(netstrms_t *pThis, netstrm_t **ppStrm)
{
netstrm_t *pStrm = NULL;
DEFiRet;
CHKiRet(objUse(netstrm, LM_NETSTRM_FILENAME));
CHKiRet(netstrm.Construct(&pStrm));
/* we copy over our driver structure. We could provide a pointer to
* ourselves, but that costs some performance on each driver invocation.
* As we already have hefty indirection (and thus performance toll), I
* prefer to copy over the function pointers here. -- rgerhards, 2008-04-23
*/
memcpy(&pStrm->Drvr, &pThis->Drvr, sizeof(pThis->Drvr));
pStrm->pNS = pThis;
*ppStrm = pStrm;
finalize_it:
if(iRet != RS_RET_OK) {
if(pStrm != NULL)
netstrm.Destruct(&pStrm);
}
RETiRet;
}
/* queryInterface function */
BEGINobjQueryInterface(netstrms)
CODESTARTobjQueryInterface(netstrms)
if(pIf->ifVersion != netstrmsCURR_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->Construct = netstrmsConstruct;
pIf->ConstructFinalize = netstrmsConstructFinalize;
pIf->Destruct = netstrmsDestruct;
pIf->CreateStrm = CreateStrm;
finalize_it:
ENDobjQueryInterface(netstrms)
/* exit our class */
BEGINObjClassExit(netstrms, OBJ_IS_LOADABLE_MODULE) /* CHANGE class also in END MACRO! */
CODESTARTObjClassExit(netstrms)
/* release objects we no longer need */
//objRelease(net, CORE_COMPONENT);
objRelease(glbl, CORE_COMPONENT);
objRelease(netstrm, LM_NETSTRM_FILENAME);
ENDObjClassExit(netstrms)
/* Initialize the netstrms class. Must be called as the very first method
* before anything else is called inside this class.
* rgerhards, 2008-02-19
*/
BEGINAbstractObjClassInit(netstrms, 1, OBJ_IS_CORE_MODULE) /* class, version */
/* request objects we use */
CHKiRet(objUse(glbl, CORE_COMPONENT));
//CHKiRet(objUse(net, CORE_COMPONENT));
/* set our own handlers */
ENDObjClassInit(netstrms)
/* --------------- here now comes the plumbing that makes as a library module --------------- */
BEGINmodExit
CODESTARTmodExit
netstrmsClassExit();
ENDmodExit
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_LIB_QUERIES
ENDqueryEtryPt
BEGINmodInit()
CODESTARTmodInit
*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
/* Initialize all classes that are in our module - this includes ourselfs */
CHKiRet(netstrmsClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
ENDmodInit
/* vi:set ai:
*/
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