1 files changed, 324 insertions, 0 deletions
diff --git a/runtime/netstrms.c b/runtime/netstrms.c
new file mode 100644
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--- /dev/null
+++ b/runtime/netstrms.c
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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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "rsyslog.h"
+#include "module-template.h"
+#include "obj.h"
+//#include "errmsg.h"
+#include "nsd.h"
+#include "netstrm.h"
+#include "nssel.h"
+#include "netstrms.h"
+
+MODULE_TYPE_LIB
+
+/* static data */
+DEFobjStaticHelpers
+//DEFobjCurrIf(errmsg)
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(netstrm)
+
+
+/* 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.
+ * WARNING: this code is mostly identical to similar code in 
+ * nssel.c - TODO: abstract it and move it to some common place.
+ * rgerhards, 2008-04-18
+ */
+static rsRetVal
+loadDrvr(netstrms_t *pThis)
+{
+	DEFiRet;
+	uchar *pBaseDrvrName;
+	uchar szDrvrName[48]; /* 48 shall be large enough */
+
+	pBaseDrvrName = pThis->pBaseDrvrName;
+	if(pBaseDrvrName == NULL) /* if no drvr name is set, use system default */
+		pBaseDrvrName = glbl.GetDfltNetstrmDrvr();
+	if(snprintf((char*)szDrvrName, sizeof(szDrvrName), "lmnsd_%s", pBaseDrvrName) == sizeof(szDrvrName))
+		ABORT_FINALIZE(RS_RET_DRVRNAME_TOO_LONG);
+	CHKmalloc(pThis->pDrvrName = (uchar*) strdup((char*)szDrvrName));
+
+	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__, szDrvrName+2, szDrvrName, (void*) &pThis->Drvr));
+
+finalize_it:
+	if(iRet != RS_RET_OK) {
+		if(pThis->pDrvrName != NULL)
+			free(pThis->pDrvrName);
+			pThis->pDrvrName = NULL;
+	}
+	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)
+	/* and now we must release our driver, if we got one. We use the presence of
+	 * a driver name string as load indicator (because we also need that string
+	 * to release the driver 
+	 */
+	if(pThis->pDrvrName != NULL) {
+		obj.ReleaseObj(__FILE__, pThis->pDrvrName+2, pThis->pDrvrName, (void*) &pThis->Drvr);
+		free(pThis->pDrvrName);
+	}
+	if(pThis->pBaseDrvrName != NULL) {
+		free(pThis->pBaseDrvrName);
+		pThis->pBaseDrvrName = NULL;
+	}
+ENDobjDestruct(netstrms)
+
+
+/* ConstructionFinalizer */
+static rsRetVal
+netstrmsConstructFinalize(netstrms_t *pThis)
+{
+	DEFiRet;
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	CHKiRet(loadDrvr(pThis));
+finalize_it:
+	RETiRet;
+}
+
+
+/* set the base driver name. If the driver name
+ * is set to NULL, the previously set name is deleted but
+ * no name set again (which results in the system default being
+ * used)-- rgerhards, 2008-05-05
+ */
+static rsRetVal
+SetDrvrName(netstrms_t *pThis, uchar *pszName)
+{
+	DEFiRet;
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	if(pThis->pBaseDrvrName != NULL) {
+		free(pThis->pBaseDrvrName);
+		pThis->pBaseDrvrName = NULL;
+	}
+
+	if(pszName != NULL) {
+		CHKmalloc(pThis->pBaseDrvrName = (uchar*) strdup((char*) pszName));
+	}
+finalize_it:
+	RETiRet;
+}
+
+
+/* set the driver's permitted peers -- rgerhards, 2008-05-19 */
+static rsRetVal
+SetDrvrPermPeers(netstrms_t *pThis, permittedPeers_t *pPermPeers)
+{
+	DEFiRet;
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	pThis->pPermPeers = pPermPeers;
+	RETiRet;
+}
+/* return the driver's permitted peers
+ * We use non-standard calling conventions because it makes an awful lot
+ * of sense here.
+ * rgerhards, 2008-05-19
+ */
+static permittedPeers_t*
+GetDrvrPermPeers(netstrms_t *pThis)
+{
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	return pThis->pPermPeers;
+}
+
+
+/* set the driver auth mode -- rgerhards, 2008-05-19 */
+static rsRetVal
+SetDrvrAuthMode(netstrms_t *pThis, uchar *mode)
+{
+	DEFiRet;
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	CHKmalloc(pThis->pszDrvrAuthMode = (uchar*)strdup((char*)mode));
+finalize_it:
+	RETiRet;
+}
+/* return the driver auth mode
+ * We use non-standard calling conventions because it makes an awful lot
+ * of sense here.
+ * rgerhards, 2008-05-19
+ */
+static uchar*
+GetDrvrAuthMode(netstrms_t *pThis)
+{
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	return pThis->pszDrvrAuthMode;
+}
+
+
+/* set the driver mode -- rgerhards, 2008-04-30 */
+static rsRetVal
+SetDrvrMode(netstrms_t *pThis, int iMode)
+{
+	DEFiRet;
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	pThis->iDrvrMode = iMode;
+	RETiRet;
+}
+
+
+/* return the driver mode
+ * We use non-standard calling conventions because it makes an awful lot
+ * of sense here.
+ * rgerhards, 2008-04-30
+ */
+static int
+GetDrvrMode(netstrms_t *pThis)
+{
+	ISOBJ_TYPE_assert(pThis, netstrms);
+	return pThis->iDrvrMode;
+}
+
+
+/* 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, DONT_LOAD_LIB));
+	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;
+	pIf->SetDrvrName = SetDrvrName;
+	pIf->SetDrvrMode = SetDrvrMode;
+	pIf->GetDrvrMode = GetDrvrMode;
+	pIf->SetDrvrAuthMode = SetDrvrAuthMode;
+	pIf->GetDrvrAuthMode = GetDrvrAuthMode;
+	pIf->SetDrvrPermPeers = SetDrvrPermPeers;
+	pIf->GetDrvrPermPeers = GetDrvrPermPeers;
+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(glbl, CORE_COMPONENT);
+	objRelease(netstrm, DONT_LOAD_LIB);
+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));
+
+	/* set our own handlers */
+ENDObjClassInit(netstrms)
+
+
+/* --------------- here now comes the plumbing that makes as a library module --------------- */
+
+
+BEGINmodExit
+CODESTARTmodExit
+	nsselClassExit();
+	netstrmsClassExit();
+	netstrmClassExit(); /* we use this object, so we must exit it after we are finished */
+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(netstrmClassInit(pModInfo));
+	CHKiRet(nsselClassInit(pModInfo));
+	CHKiRet(netstrmsClassInit(pModInfo));
+ENDmodInit
+/* vi:set ai:
+ */