Adding upstream version 8.2402.0.upstream/8.2402.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 1967 insertions, 0 deletions

diff --git a/plugins/imdtls/Makefile.am b/plugins/imdtls/Makefile.am
new file mode 100644
index 0000000..bf544b3
--- /dev/null
+++ b/plugins/imdtls/Makefile.am
@@ -0,0 +1,6 @@
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+imdtls_la_DEPENDENCIES = ../../runtime/lmnsd_ossl.la
+imdtls_la_SOURCES = imdtls.c
+imdtls_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS) $(OPENSSL_CFLAGS)
+imdtls_la_LDFLAGS = -module -avoid-version
+imdtls_la_LIBADD = $(OPENSSL_LIBS) ../../runtime/lmnsd_ossl.la
diff --git a/plugins/imdtls/Makefile.in b/plugins/imdtls/Makefile.in
new file mode 100644
index 0000000..03043f4
--- /dev/null
+++ b/plugins/imdtls/Makefile.in
@@ -0,0 +1,797 @@
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+
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+	@list='$(pkglib_LTLIBRARIES)'; \
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+	      sed 's|^[^/]*$$|.|; s|/[^/]*$$||; s|$$|/so_locations|' | \
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+	test -z "$$locs" || { \
+	  echo rm -f $${locs}; \
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+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
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+	$(am__define_uniq_tagged_files); mkid -fID $$unique
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+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
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+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plugins/imdtls/imdtls.c b/plugins/imdtls/imdtls.c
new file mode 100644
index 0000000..6501d9c
--- /dev/null
+++ b/plugins/imdtls/imdtls.c
@@ -0,0 +1,1164 @@
+/**
+ * The dtls input module, uses OpenSSL as library to implement DTLS.
+ *
+ * \author  Andre Lorbach <alorbach@adiscon.com>
+ *
+ * Copyright (C) 2023 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.
+ */
+#include "config.h"
+
+#include <stdio.h>
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/errno.h>
+#include <poll.h>
+#include <assert.h>
+#include <time.h>
+
+// --- Include openssl headers as well
+#include <openssl/ssl.h>
+#include <openssl/x509v3.h>
+#include <openssl/err.h>
+#if OPENSSL_VERSION_NUMBER >= 0x30000000L && !defined(LIBRESSL_VERSION_NUMBER)
+#	include <openssl/bioerr.h>
+#endif
+#include <openssl/engine.h>
+// ---
+
+#include "rsyslog.h"
+#include "dirty.h"
+#include "module-template.h"
+#include "cfsysline.h"
+#include "msg.h"
+#include "errmsg.h"
+#include "glbl.h"
+#include "srUtils.h"
+#include "msg.h"
+#include "parser.h"
+#include "datetime.h"
+#include "net.h"
+#include "net_ossl.h"
+#include "prop.h"
+#include "ruleset.h"
+#include "statsobj.h"
+#include "unicode-helper.h"
+
+MODULE_TYPE_INPUT
+MODULE_TYPE_NOKEEP
+MODULE_CNFNAME("imdtls")
+
+/* defines */
+#define MAX_DTLS_CLIENTS 1024
+#define MAX_DTLS_MSGSIZE 65536
+#define DTLS_LISTEN_PORT "4433"
+// 1800 seconds = 30 minutes
+#define DTLS_DEFAULT_TIMEOUT 1800
+
+/* Module static data */
+DEF_OMOD_STATIC_DATA
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(datetime)
+DEFobjCurrIf(prop)
+DEFobjCurrIf(ruleset)
+DEFobjCurrIf(statsobj)
+DEFobjCurrIf(net)
+DEFobjCurrIf(net_ossl)
+
+#define DTLS_MAX_RCVBUF 8192	/* Maximum DTLS packet is 8192 bytes which fits into Jumbo Frames. If not enabled
+				*  message fragmentation (Ethernet MTU of ~ 1500 bytes) can occur.*/
+
+/* config settings */
+typedef struct configSettings_s {
+	uchar *pszBindRuleset;		/* name of Ruleset to bind to */
+} configSettings_t;
+static configSettings_t cs;
+
+struct dtlsClient_s {
+	SSL* sslClient;			/* DTSL (SSL) Client */
+	time_t lastActivityTime;	/* Last Activity Time */
+	int clientfd;			/* ClientFD */
+};
+
+// Use typedef to define a type 'dtlsClient_t' based on 'struct dtlsClient_s'
+typedef struct dtlsClient_s dtlsClient_t;
+
+struct instanceConf_s {
+	/* Network properties */
+	uchar *pszBindAddr;		/* Listening IP Address */
+	uchar *pszBindPort;		/* Port to bind socket to */
+	int timeout;			/* Default timeout for DTLS Sessions */
+	/* Common properties */
+	uchar *pszBindRuleset;		/* name of ruleset to bind to */
+	uchar *pszInputName;
+	prop_t *pInputName;		/* InputName in property format for fast access */
+	ruleset_t *pBindRuleset;	/* ruleset to bind listener to (use system default if unspecified) */
+	sbool bEnableLstn;		/* flag to permit disabling of listener in error case */
+	statsobj_t *stats;		/* listener stats */
+	STATSCOUNTER_DEF(ctrSubmit, mutCtrSubmit)
+	/* OpenSSL properties */
+	uchar *tlscfgcmd;			/* OpenSSL Config Command used to override any OpenSSL Settings */
+	permittedPeers_t *pPermPeersRoot;	/* permitted peers */
+	int CertVerifyDepth;			/* Verify Depth for certificate chains */
+	/* Instance Variables */
+	char *pszRcvBuf;
+	int lenRcvBuf;
+	/**< -1: empty, 0: connection closed, 1..NSD_OSSL_MAX_RCVBUF-1: data of that size present */
+	int ptrRcvBuf;			/**< offset for next recv operation if 0 < lenRcvBuf < NSD_OSSL_MAX_RCVBUF */
+
+	/* OpenSSL and Config Cert vars inside net_ossl_t now */
+	net_ossl_t *pNetOssl;		/* OSSL shared Config and object vars are here */
+	int nClients;			/* */
+	dtlsClient_t **dtlsClients;	/* Array of DTSL (SSL) Clients */
+	int sockfd;			/* UDP Socket used to bind to */
+	struct sockaddr_in server_addr;	/* Server Sockaddr */
+	int port;			/* Server Port as integer */
+
+	int id;				/* Thread ID */
+	thrdInfo_t *pThrd;		/* Thread Instance Info */
+	pthread_t tid;			/* the instances thread ID */
+
+	struct instanceConf_s *next;
+	struct instanceConf_s *prev;
+};
+
+/* config variables */
+struct modConfData_s {
+	rsconf_t *pConf;		/* our overall config object */
+	instanceConf_t *root, *tail;
+	uchar *pszBindRuleset;		/* default name of Ruleset to bind to */
+	AuthMode drvrAuthMode;		/* authenticate peer if no other name given */
+};
+
+static modConfData_t *loadModConf = NULL;/* modConf ptr to use for the current load process */
+static modConfData_t *runModConf = NULL;/* modConf ptr to use for the current load process */
+
+static prop_t *pInputName = NULL;
+
+/* module-global parameters */
+static struct cnfparamdescr modpdescr[] = {
+	{ "ruleset", eCmdHdlrGetWord, 0 },
+	{ "tls.authmode", eCmdHdlrString, 0 },
+};
+static struct cnfparamblk modpblk =
+	{ CNFPARAMBLK_VERSION,
+	  sizeof(modpdescr)/sizeof(struct cnfparamdescr),
+	  modpdescr
+	};
+
+/* input instance parameters */
+static struct cnfparamdescr inppdescr[] = {
+	{ "port", eCmdHdlrString, CNFPARAM_REQUIRED },
+	{ "address", eCmdHdlrString, 0 },
+	{ "timeout", eCmdHdlrPositiveInt, 0 },
+	{ "name", eCmdHdlrString, 0 },
+	{ "ruleset", eCmdHdlrString, 0 },
+	{ "tls.permittedpeer", eCmdHdlrArray, 0 },
+	{ "tls.authmode", eCmdHdlrString, 0 },
+	{ "tls.cacert", eCmdHdlrString, 0 },
+	{ "tls.mycert", eCmdHdlrString, 0 },
+	{ "tls.myprivkey", eCmdHdlrString, 0 },
+	{ "tls.tlscfgcmd", eCmdHdlrString, 0 }
+};
+static struct cnfparamblk inppblk =
+	{ CNFPARAMBLK_VERSION,
+	  sizeof(inppdescr)/sizeof(struct cnfparamdescr),
+	  inppdescr
+	};
+#include "im-helper.h" /* must be included AFTER the type definitions! */
+
+/* create input instance, set default parameters, and
+ * add it to the list of instances.
+ */
+static rsRetVal
+createInstance(instanceConf_t **pinst)
+{
+	instanceConf_t *inst;
+	DEFiRet;
+	CHKmalloc(inst = malloc(sizeof(instanceConf_t)));
+	inst->next = NULL;
+
+	inst->pszBindAddr = NULL;
+	inst->pszBindPort = NULL;
+	inst->timeout = 1800;
+	inst->pszBindRuleset = loadModConf->pszBindRuleset;
+	inst->pszInputName = NULL;
+	inst->pBindRuleset = NULL;
+	inst->bEnableLstn = 0;
+
+	inst->tlscfgcmd = NULL;
+	inst->pPermPeersRoot = NULL;
+	inst->CertVerifyDepth = 2;
+
+	/* node created, let's add to config */
+	if(loadModConf->tail == NULL) {
+		loadModConf->tail = loadModConf->root = inst;
+	} else {
+		loadModConf->tail->next = inst;
+		loadModConf->tail = inst;
+	}
+
+	// Construct pNetOssl helper
+	CHKiRet(net_ossl.Construct(&inst->pNetOssl));
+	inst->pNetOssl->authMode = loadModConf->drvrAuthMode;
+
+	*pinst = inst;
+finalize_it:
+	RETiRet;
+}
+
+
+/* function to generate an error message if the ruleset cannot be found */
+static inline void
+std_checkRuleset_genErrMsg(__attribute__((unused)) modConfData_t *modConf, instanceConf_t *inst)
+{
+	LogError(0, NO_ERRCODE, "imdtls[%s]: ruleset '%s' not found - "
+			"using default ruleset instead",
+			inst->pszBindPort, inst->pszBindRuleset);
+}
+
+static void
+DTLSCloseSocket(instanceConf_t *inst) {
+	DBGPRINTF("imdtls: DTLSCloseSocket for %s:%d\n", inst->pszBindAddr, inst->port);
+	// Close UDP Socket
+	close(inst->sockfd);
+	inst->sockfd = 0;
+}
+
+static rsRetVal
+DTLSCreateSocket(instanceConf_t *inst) {
+	DEFiRet;
+	int optval = 1;
+	int flags;
+
+	struct in_addr ip_struct;
+	DBGPRINTF("imdtls: DTLSCreateSocket for %s:%d\n", inst->pszBindAddr, inst->port);
+	
+	// Create UDP Socket
+	inst->sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+	if (inst->sockfd < 0) {
+		LogError(0, NO_ERRCODE, "imdtls: Unable to create DTLS listener,"
+				" failed to create socket, "
+				" ignoring port %d bind-address %s.",
+				inst->port, inst->pszBindAddr);
+		ABORT_FINALIZE(RS_RET_ERR);
+	}
+	setsockopt(inst->sockfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
+	setsockopt(inst->sockfd, SOL_SOCKET, SO_REUSEPORT, &optval, sizeof(optval));
+
+	// Set NON Blcoking Flags
+	flags = fcntl(inst->sockfd, F_GETFL, 0);
+	fcntl(inst->sockfd, F_SETFL, flags | O_NONBLOCK);
+
+	// Convert IP Address into numeric
+	if (inet_pton(AF_INET, (char*) inst->pszBindAddr, &ip_struct) <= 0) {
+		LogError(0, NO_ERRCODE, "imdtls: Unable to create DTLS listener,"
+				" invalid Bind Address, "
+				" ignoring port %d bind-address %s.",
+				inst->port, inst->pszBindAddr);
+		ABORT_FINALIZE(RS_RET_ERR);
+	}
+
+	// Set Server Address
+	memset(&inst->server_addr, 0, sizeof(struct sockaddr_in));
+	inst->server_addr.sin_family = AF_INET;
+	inst->server_addr.sin_port = htons(inst->port);
+	inst->server_addr.sin_addr.s_addr = htonl(ip_struct.s_addr);
+
+	// Bind UDP Socket
+	if (bind(inst->sockfd, (struct sockaddr*)&inst->server_addr, sizeof(struct sockaddr_in)) < 0) {
+		LogError(0, NO_ERRCODE, "imdtls: Unable to create DTLS listener,"
+				" unable to bind, "
+				" ignoring port %d bind-address %s.",
+				inst->port, inst->pszBindAddr);
+		ABORT_FINALIZE(RS_RET_ERR);
+	}
+finalize_it:
+	RETiRet;
+}
+
+/* Verify Callback for X509 Certificate validation. Force visibility as this function is not called anywhere but
+*  only used as callback!
+*/
+static int
+imdtls_verify_callback(int status, SSL* ssl)
+{
+	DEFiRet;
+	X509 *certpeer;
+	instanceConf_t *inst = NULL;
+
+	dbgprintf("imdtls_verify_callback: get SSL [%p]\n", (void *)ssl);
+	inst = (instanceConf_t*) SSL_get_ex_data(ssl, 2);
+
+	/* Continue check if certificate verify was valid */
+	if (status == 1) {
+		if (	ssl != NULL &&
+			inst != NULL) {
+			/* call the actual function based on current auth mode */
+			switch(inst->pNetOssl->authMode) {
+				case OSSL_AUTH_CERTNAME:
+					/* if we check the name, we must ensure the cert is valid */
+					certpeer = net_ossl_getpeercert(inst->pNetOssl, ssl, NULL);
+					dbgprintf("imdtls_verify_callback: Check peer certname[%p]=%s\n",
+						(void *)ssl, (certpeer != NULL ? "VALID" : "NULL"));
+					CHKiRet(net_ossl_chkpeercertvalidity(inst->pNetOssl, ssl, NULL));
+					CHKiRet(net_ossl_chkpeername(inst->pNetOssl, certpeer, NULL));
+					break;
+				case OSSL_AUTH_CERTFINGERPRINT:
+					certpeer = net_ossl_getpeercert(inst->pNetOssl, ssl, NULL);
+					dbgprintf("imdtls_verify_callback: Check peer fingerprint[%p]=%s\n",
+						(void *)ssl, (certpeer != NULL ? "VALID" : "NULL"));
+					CHKiRet(net_ossl_chkpeercertvalidity(inst->pNetOssl, ssl, NULL));
+					CHKiRet(net_ossl_peerfingerprint(inst->pNetOssl, certpeer, NULL));
+					break;
+				case OSSL_AUTH_CERTVALID:
+					certpeer = net_ossl_getpeercert(inst->pNetOssl, ssl, NULL);
+					dbgprintf("imdtls_verify_callback: Check peer valid[%p]=%s\n",
+						(void *)ssl, (certpeer != NULL ? "VALID" : "NULL"));
+					CHKiRet(net_ossl_chkpeercertvalidity(inst->pNetOssl, ssl, NULL));
+					break;
+				case OSSL_AUTH_CERTANON:
+					dbgprintf("imdtls_verify_callback: ANON[%p]\n", (void *)ssl);
+					FINALIZE;
+					break;
+			}
+		} else {
+			LogMsg(0, RS_RET_NO_ERRCODE, LOG_WARNING, "imdtls_verify_callback: MISSING ssl or inst!");
+		}
+	}
+finalize_it:
+	if(iRet != RS_RET_OK) {
+		DBGPRINTF("imdtls_verify_callback: FAILED\n");
+		status = 0;
+	}
+	return status;
+}
+
+
+static rsRetVal
+addListner(modConfData_t __attribute__((unused)) *modConf, instanceConf_t *inst)
+{
+	uchar statname[64];
+	DEFiRet;
+	DBGPRINTF("imdtls: addListner ENTER\n");
+
+	if(!inst->bEnableLstn) {
+		DBGPRINTF("imdtls: DTLS Listener not started because it is disabled by config error\n");
+		FINALIZE;
+	}
+
+	inst->pszInputName = ustrdup((inst->pszInputName == NULL) ?  UCHAR_CONSTANT("imdtls") : inst->pszInputName);
+	CHKiRet(prop.Construct(&inst->pInputName));
+	CHKiRet(prop.SetString(inst->pInputName, inst->pszInputName, ustrlen(inst->pszInputName)));
+	CHKiRet(prop.ConstructFinalize(inst->pInputName));
+
+	/* Init defaults */
+	if (inst->pszBindPort == NULL) {
+		CHKmalloc(inst->pszBindPort = ustrdup((uchar*) DTLS_LISTEN_PORT));
+	}
+
+	/* Init SSL Handles! */
+	CHKmalloc(inst->dtlsClients = (dtlsClient_t**) calloc(MAX_DTLS_CLIENTS, sizeof(dtlsClient_t*)));
+	for (int i = 0; i < MAX_DTLS_CLIENTS; ++i) {
+		CHKmalloc(inst->dtlsClients[i] = (dtlsClient_t*) calloc(1, sizeof(dtlsClient_t)));
+	}
+	inst->nClients = 0;
+
+	/* support statistics gathering */
+	CHKiRet(statsobj.Construct(&(inst->stats)));
+	snprintf((char*)statname, sizeof(statname), "%s(%s)",
+		 inst->pszInputName, inst->pszBindPort);
+	statname[sizeof(statname)-1] = '\0'; /* just to be on the save side... */
+	CHKiRet(statsobj.SetName(inst->stats, statname));
+	CHKiRet(statsobj.SetOrigin(inst->stats, (uchar*)"imdtls"));
+	STATSCOUNTER_INIT(inst->ctrSubmit, inst->mutCtrSubmit);
+	CHKiRet(statsobj.AddCounter(inst->stats, UCHAR_CONSTANT("submitted"),
+		ctrType_IntCtr, CTR_FLAG_RESETTABLE, &(inst->ctrSubmit)));
+	CHKiRet(statsobj.ConstructFinalize(inst->stats));
+	/* end stats counters */
+
+	// Init OpenSSL Context with DTLS_server_method
+	CHKiRet(net_ossl.osslCtxInit(inst->pNetOssl, DTLS_method()));
+
+#	if OPENSSL_VERSION_NUMBER >= 0x10002000L
+	// Init OpenSSL Cookie Callbacks
+	CHKiRet(net_ossl.osslCtxInitCookie(inst->pNetOssl));
+#	endif
+	// Run openssl config commands in Context
+	CHKiRet(net_ossl_apply_tlscgfcmd(inst->pNetOssl, inst->tlscfgcmd));
+
+	// Init Socket
+	CHKiRet(DTLSCreateSocket(inst));
+finalize_it:
+	if(iRet != RS_RET_OK) {
+		LogError(0, NO_ERRCODE, "DTLS Listener for thread failed to create UDP socket "
+				"for thread %s is not functional!", inst->pszInputName);
+	} else {
+		DBGPRINTF("imdtls: DTLS Listener for thread %s added\n", inst->pszInputName);
+	}
+	RETiRet;
+}
+
+static rsRetVal
+processMsg(instanceConf_t *inst, dtlsClient_t *dtlsClient, char *msg, size_t lenMsg)
+{
+	DEFiRet;
+	smsg_t *pMsg = NULL;
+	prop_t *pProp = NULL;
+	BIO *wbio;
+	BIO_ADDR *peer_addr;
+
+	/* Get Gentime */
+	time_t ttGenTime = 0;
+	struct syslogTime stTime;
+	datetime.getCurrTime(&stTime, &ttGenTime, TIME_IN_LOCALTIME);
+
+	/* we now create our own message object and submit it to the queue */
+	CHKiRet(msgConstructWithTime(&pMsg, &stTime, ttGenTime));
+	MsgSetRawMsg(pMsg, msg, lenMsg);
+	MsgSetInputName(pMsg, inst->pInputName);
+	MsgSetRuleset(pMsg, inst->pBindRuleset);
+	MsgSetFlowControlType(pMsg, eFLOWCTL_NO_DELAY);
+	pMsg->msgFlags  = NEEDS_PARSING | PARSE_HOSTNAME;
+
+	// Obtain Sender from BIO
+	wbio = SSL_get_wbio(dtlsClient->sslClient);
+	peer_addr = BIO_ADDR_new();
+	if (BIO_dgram_get_peer(wbio, peer_addr)) {
+		char *pHostname = BIO_ADDR_hostname_string(peer_addr, 1);
+		DBGPRINTF("imdtls: processMsg Received message from %s: %s\n", pHostname, msg);
+		MsgSetRcvFromStr(pMsg, (uchar *)pHostname, strlen(pHostname), &pProp);
+		CHKiRet(prop.Destruct(&pProp));
+		OPENSSL_free(pHostname);
+	} else {
+		DBGPRINTF("imdtls: processMsg Received message from UNKNOWN: %s\n", msg);
+	}
+	BIO_ADDR_free(peer_addr);
+	
+	// Update Activity
+	dtlsClient->lastActivityTime = time(NULL);
+
+	// Submit Message
+	CHKiRet(submitMsg2(pMsg));
+	STATSCOUNTER_INC(inst->ctrSubmit, inst->mutCtrSubmit);
+finalize_it:
+	RETiRet;
+}
+
+static void
+DTLScleanupSession(instanceConf_t *inst, int idx) {
+	if (inst->dtlsClients[idx]->sslClient != NULL) {
+		BIO *rbio = SSL_get_rbio(inst->dtlsClients[idx]->sslClient);
+		if (rbio) {
+			// Close socket FIRST!
+			int clientfd = -1;
+			BIO_get_fd(rbio, &clientfd);
+			if (clientfd != -1) {
+				close(clientfd);
+			}
+		}
+		SSL_free(inst->dtlsClients[idx]->sslClient);
+		DBGPRINTF("imdtls: DTLScleanupSession Socket/SSL for Client idx (%d) terminated.\n", idx);
+	}
+	inst->dtlsClients[idx]->sslClient = NULL;
+	inst->dtlsClients[idx]->lastActivityTime = 0;
+}
+
+static void
+DTLSAcceptSession(instanceConf_t *inst, int idx) {
+	int ret, err;
+	SSL* ssl = inst->dtlsClients[idx]->sslClient;
+	DBGPRINTF("imdtls: DTLSAcceptSession for Client idx (%d).\n", idx);
+
+	// Check if the handshake has already been completed
+	ret = SSL_get_state(ssl);
+	if (ret != TLS_ST_OK) {
+		// Existing client Finish handshake
+		ret = SSL_accept(ssl);
+		if (ret <= 0) {
+			err = SSL_get_error(ssl, ret);
+			if (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE) {
+				// Non-blocking operation did not complete; retry later
+				DBGPRINTF("imdtls: SSL_accept didn't complete (%d). Will retry.\n", err);
+			} else if(err == SSL_ERROR_SYSCALL) {
+				DBGPRINTF("imdtls: SSL_accept failed SSL_ERROR_SYSCALL idx (%d), removing client.\n",
+					idx);
+				net_ossl_lastOpenSSLErrorMsg(NULL, err, ssl, LOG_WARNING,
+					"DTLSHandleSessions", "SSL_accept");
+				DTLScleanupSession(inst, idx);
+			} else {
+				// An actual error occurred
+				DBGPRINTF("imdtls: SSL_accept failed (%d) idx (%d), removing client.\n", err, idx);
+				net_ossl_lastOpenSSLErrorMsg(NULL, err, ssl, LOG_ERR,
+					"DTLSHandleSessions", "SSL_accept");
+				DTLScleanupSession(inst, idx);
+			}
+		} else {
+			DBGPRINTF("imdtls: SSL_accept success idx (%d), adding client.\n", idx);
+			inst->dtlsClients[idx]->lastActivityTime = time(NULL);
+
+			int status = 1;
+			status = imdtls_verify_callback(status, ssl);
+			if (status == 0) {
+				LogMsg(0, RS_RET_NO_ERRCODE, LOG_WARNING,
+					"imdtls: Cert Verify FAILED for DTLS client idx (%d)",idx);
+			} else {
+				DBGPRINTF("imdtls: Cert Verify SUCCESS for DTLS client idx (%d)\n", idx);
+			}
+		}
+	} else {
+		DBGPRINTF("imdtls: SSL_get_state for DTLS client idx (%d) is %d\n", idx, ret);
+	}
+}
+
+static void
+DTLSTerminateClients(instanceConf_t *inst) {
+	// Process pending Client Data first!
+	for (int i = 0; i < MAX_DTLS_CLIENTS; ++i) {
+		if (inst->dtlsClients[i]->sslClient != NULL) {
+			DTLScleanupSession(inst, i);
+		}
+	}
+}
+
+static void
+DTLSReadClient(instanceConf_t *inst, int idx, short revents) {
+	int err;
+	SSL* ssl = inst->dtlsClients[idx]->sslClient;
+	DBGPRINTF("imdtls: DEBUG Check Client activity on index %d.\n", idx);
+	if (revents & POLLIN) {
+		if (ssl == NULL) {
+			DBGPRINTF("imdtls: DTLSHandleSessions MISSING SSL OBJ for index %d.\n", idx);
+			return;
+		}
+		DBGPRINTF("imdtls: Read Client activity on index %d.\n", idx);
+		char buf[MAX_DTLS_MSGSIZE];
+		int len = 0;
+		do {
+			len = SSL_read(ssl, buf, sizeof(buf) - 1);
+			if (len > 0) {
+				buf[len] = '\0';
+				processMsg(inst, inst->dtlsClients[idx], buf, len);
+			} else {
+				err = SSL_get_error(ssl, len);
+				if (err == SSL_ERROR_WANT_READ) {
+					DBGPRINTF("imdtls: SSL_ERROR_WANT_READ flush rbio on index %d.\n", idx);
+					BIO *rbio = SSL_get_rbio(ssl);
+					BIO_flush(rbio);
+				} else if (err == SSL_ERROR_WANT_WRITE) {
+					DBGPRINTF("imdtls: SSL_ERROR_WANT_WRITE flush wbio on index %d.\n", idx);
+					BIO *wbio = SSL_get_wbio(ssl);
+					BIO_flush(wbio);
+				} else if (err == SSL_ERROR_ZERO_RETURN) {
+					DBGPRINTF("imdtls: SSL_ERROR_ZERO_RETURN on index %d.\n", idx);
+					break;
+				} else if (err == SSL_ERROR_SYSCALL) {
+					DBGPRINTF("imdtls: SSL_ERROR_SYSCALL on index %d ERRNO %d\n", idx, errno);
+					net_ossl_lastOpenSSLErrorMsg(NULL, err, ssl, LOG_ERR,
+						"DTLSReadClient", "SSL_read");
+					DTLScleanupSession(inst, idx);
+					break;
+				} else {
+					DBGPRINTF("imdtls: SSL_read error %d (%d) on idx %d, rem client.\n",
+						err, errno, idx);
+					DTLScleanupSession(inst, idx);
+					// Exit the loop if any error occurs
+					break;
+				}
+			}
+		} while (len > 0);
+	}
+}
+
+static void
+DTLSHandleSessions(instanceConf_t *inst) {
+	int fdToIndex[MAX_DTLS_CLIENTS + 1];
+	struct pollfd fds[MAX_DTLS_CLIENTS + 1];
+	int optval = 1;
+	int fdcount = 0;
+	int ret, err;
+	memset(fdToIndex, 0, sizeof(fdToIndex));
+	memset(fds, 0, sizeof(fds));
+	fds[0].fd = inst->sockfd;
+	fds[0].events = POLLIN;
+	DBGPRINTF("imdtls: DTLSHandleSessions ENTER \n");
+
+	// Create FDS Array for Polling sockets
+	for (int i = 0; i < MAX_DTLS_CLIENTS; ++i) {
+		if (inst->dtlsClients[i]->sslClient != NULL) {
+			int clientfd = -1;
+			fdcount++;
+			BIO_get_fd(SSL_get_wbio(inst->dtlsClients[i]->sslClient), &clientfd);
+			DBGPRINTF("imdtls: DTLSHandleSessions handle client %d (%d)\n", fdcount, clientfd);
+			fds[fdcount].fd = clientfd;
+			fds[fdcount].events = POLLIN;
+			fdToIndex[clientfd] = i; // Map fd to dtlsClients index
+		}
+	}
+
+	DBGPRINTF("imdtls: Waiting for poll (clients %d) ...\n", fdcount);
+	ret = poll(fds, fdcount+1, -1);
+	if(glbl.GetGlobalInputTermState() == 1) {
+		DBGPRINTF("imdtls: DTLSHandleSessions Terminate State\n");
+		return; /* terminate input! */
+	}
+	if (ret < 0) {
+		DBGPRINTF("imdtls: DTLSHandleSessions ERROR poll failed %d with err %d\n", ret , errno);
+		return;
+	}
+	
+	// Process pending Client Data first!
+	DBGPRINTF("imdtls: DTLSHandleSessions handle client sockets (%d) \n", fdcount);
+	for (int i = 1; i <= fdcount; ++i) {
+		DTLSReadClient(inst, fdToIndex[fds[i].fd], fds[i].revents);
+	}
+	
+	// Check session timeouts
+	for (int i = 0; i < MAX_DTLS_CLIENTS; ++i) {
+		if (inst->dtlsClients[i]->sslClient != NULL) {
+			if (difftime(time(NULL), inst->dtlsClients[i]->lastActivityTime) > inst->timeout) {
+				DBGPRINTF("imdtls: Session timeout (%d) for client index %d.\n", i, inst->timeout);
+				DTLScleanupSession(inst, i);
+				continue;
+			}
+		}
+	}
+
+	// Check MAIN socket for new connections
+	if (fds[0].revents & POLLIN) {
+		DBGPRINTF("imdtls: DTLSHandleSessions handle main socket\n");
+
+		// Create BIO Object for potential new client
+		BIO *sbio = BIO_new_dgram(inst->sockfd, BIO_NOCLOSE);
+		BIO_ctrl(sbio, BIO_CTRL_DGRAM_MTU_DISCOVER, 0, NULL);
+
+		// Create SSL Object for new client and apply default callbacks
+		SSL *ssl = SSL_new(inst->pNetOssl->ctx);
+		SSL_set_bio(ssl, sbio, sbio);
+		SSL_set_accept_state(ssl);
+		if (inst->pNetOssl->authMode != OSSL_AUTH_CERTANON) {
+			dbgprintf("imdtls: enable certificate checking (Mode=%d, VerifyDepth=%d)\n",
+				inst->pNetOssl->authMode, inst->CertVerifyDepth);
+			net_ossl_set_ssl_verify_callback(ssl,
+				SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT);
+			if (inst->CertVerifyDepth != 0) {
+				SSL_set_verify_depth(ssl, inst->CertVerifyDepth);
+			}
+		}
+
+		// Store reference in SSL obj
+		SSL_set_ex_data(ssl, 0, NULL); /* Reserved for pTcp */
+		SSL_set_ex_data(ssl, 1, NULL); /* Reserved for permitExpiredCerts */
+		SSL_set_ex_data(ssl, 2, inst); /* Used in imdtls */
+
+		// Debug Callback for conn sbio!
+		net_ossl_set_bio_callback(sbio);
+
+		// Connect the new Client
+		BIO_ADDR *client_addr = BIO_ADDR_new();
+
+		// Start DTLS Listen and Session
+		do {
+			ret = DTLSv1_listen(ssl, client_addr);
+			if (ret > 0) {
+				dbgprintf("imdtls: DTLSHandleSessions DTLSv1_listen SUCCESS\n");
+				// Create new CLIENT socket for communication!
+				int clientfd = socket(BIO_ADDR_family(client_addr), SOCK_DGRAM, 0);
+				if (clientfd < 0) {
+					LogError(0, NO_ERRCODE, "imdtls: DTLSHandleSessions unable to create"
+						" client socket");
+					return;
+				}
+				setsockopt(clientfd, SOL_SOCKET, SO_REUSEADDR, &optval, sizeof(optval));
+				setsockopt(clientfd, SOL_SOCKET, SO_REUSEPORT, &optval, sizeof(optval));
+				// Bind and Connect Client Socket
+				if (bind(clientfd,
+					(struct sockaddr*) &inst->server_addr, sizeof(struct sockaddr_in)) < 0) {
+					LogError(0, NO_ERRCODE, "imdtls: DTLSHandleSessions unable to bind"
+							" client socket"
+							" ignoring port %d bind-address %s.",
+							inst->port, inst->pszBindAddr);
+					return;
+				}
+				// Set new fd and set BIO to connected
+				BIO *rbio = SSL_get_rbio(ssl);
+				BIO_set_fd(rbio, clientfd, BIO_NOCLOSE);
+
+				// Set and activate timeouts
+				struct timeval timeout;
+				timeout.tv_sec = inst->timeout;
+				timeout.tv_usec = 0;
+				BIO_ctrl(rbio, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT, 0, &timeout);
+
+				// Set BIO to connected
+				ret = BIO_connect(clientfd, client_addr, 0);
+				if (ret == 0) {
+					err = SSL_get_error(ssl, ret);
+					DBGPRINTF("imdtls: DTLSHandleSessions BIO_connect ERROR %d\n", err);
+					net_ossl_lastOpenSSLErrorMsg(NULL, err, ssl, LOG_WARNING,
+						"DTLSHandleSessions", "BIO_connect");
+					LogMsg(0, RS_RET_NO_ERRCODE, LOG_WARNING,
+						"imdtls: BIO_connect failed for DTLS client");
+					SSL_free(ssl);
+				} else {
+					BIO_ctrl_set_connected(rbio, client_addr);
+					DBGPRINTF("imdtls: BIO_connect succeeded.\n");
+
+					// Add to DTLS Clients
+					for (int i = 0; i < MAX_DTLS_CLIENTS; ++i) {
+						if (inst->dtlsClients[i]->sslClient == NULL) {
+							inst->dtlsClients[i]->sslClient = ssl;
+							inst->dtlsClients[i]->lastActivityTime = time(NULL);
+							DBGPRINTF("imdtls: New Client added at idx %d.\n", i);
+							DTLSAcceptSession(inst, i);
+							break;
+						}
+					}
+				}
+				break;
+			} else {
+				err = SSL_get_error(ssl, ret);
+				if (	(ret == 0 && err == SSL_ERROR_SYSCALL) ||
+					(err == SSL_ERROR_SYSCALL && errno == EAGAIN)) {
+					DBGPRINTF("imdtls: DTLSv1_listen RET %d (ERR %d / ERRNO %d), retry\n",
+						ret, err, errno);
+					// Wait little and retry DTLSv1_listen
+					srSleep(0, 100000);
+					continue;
+				} else {
+					DBGPRINTF("imdtls: DTLSv1_listen RET %d (ERR %d / ERRNO %d), abort\n",
+						ret, err, errno);
+					net_ossl_lastOpenSSLErrorMsg(NULL, err, ssl, LOG_WARNING,
+						"DTLSHandleSessions", "DTLSv1_listen");
+					LogMsg(0, RS_RET_NO_ERRCODE, LOG_WARNING,
+						"imdtls: DTLSv1_listen failed for DTLS client");
+					SSL_free(ssl);
+					break;
+				}
+			}
+		}
+		while (1);
+		BIO_ADDR_free(client_addr);
+	}
+}
+
+static void*
+startDtlsHandler(void *myself) {
+	instanceConf_t *inst = (instanceConf_t *) myself;
+	DBGPRINTF("imdtls: start DtlsHandler for thread %s\n", inst->pszInputName);
+
+	/* DTLS Receiving Loop */
+	while(glbl.GetGlobalInputTermState() == 0) {
+		DBGPRINTF("imdtls: begin handle DTSL Client Sessions\n");
+		DTLSHandleSessions(inst);
+	}
+
+	/* DTLS Terminate Sessions */
+	DBGPRINTF("imdtls: Terminate DTLS Client Sessions\n");
+	DTLSTerminateClients(inst);
+
+	DBGPRINTF("imdtls: stop DtlsHandler for thread %s\n", inst->pszInputName);
+	return NULL;
+}
+
+/* Set permitted peers. It is depending on the auth mode if this are
+ * fingerprints or names. -- rgerhards, 2008-05-19
+ */
+static rsRetVal
+SetPermPeers(instanceConf_t *inst, permittedPeers_t *pPermPeers)
+{
+	DEFiRet;
+	if(pPermPeers == NULL)
+		FINALIZE;
+
+	if(inst->pNetOssl->authMode != OSSL_AUTH_CERTFINGERPRINT && inst->pNetOssl->authMode != OSSL_AUTH_CERTNAME) {
+		LogError(0, RS_RET_VALUE_NOT_IN_THIS_MODE, "authentication not supported by "
+				"imdtls in the configured authentication mode - ignored");
+		ABORT_FINALIZE(RS_RET_VALUE_NOT_IN_THIS_MODE);
+	}
+	inst->pNetOssl->pPermPeers = pPermPeers;
+finalize_it:
+	RETiRet;
+}
+BEGINnewInpInst
+	struct cnfparamvals *pvals;
+	instanceConf_t *inst = NULL;
+	int i,j;
+	FILE *fp;
+CODESTARTnewInpInst
+	DBGPRINTF("newInpInst (imdtls)\n");
+
+	if((pvals = nvlstGetParams(lst, &inppblk, NULL)) == NULL) {
+		ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS);
+	}
+
+	if(Debug) {
+		dbgprintf("input param blk in imdtls:\n");
+		cnfparamsPrint(&inppblk, pvals);
+	}
+
+	CHKiRet(createInstance(&inst));
+
+	for(i = 0 ; i < inppblk.nParams ; ++i) {
+		if(!pvals[i].bUsed)
+			continue;
+		if(!strcmp(inppblk.descr[i].name, "port")) {
+			inst->pszBindPort = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+		} else if(!strcmp(inppblk.descr[i].name, "address")) {
+			inst->pszBindAddr = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+		} else if(!strcmp(inppblk.descr[i].name, "timeout")) {
+			inst->timeout = (int) pvals[i].val.d.n;
+		} else if(!strcmp(inppblk.descr[i].name, "ruleset")) {
+			inst->pszBindRuleset = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+		} else if(!strcmp(inppblk.descr[i].name, "name")) {
+			inst->pszInputName = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+		} else if(!strcmp(inppblk.descr[i].name, "tls.authmode")) {
+			char* pszAuthMode = es_str2cstr(pvals[i].val.d.estr, NULL);
+			if(!strcasecmp(pszAuthMode, "fingerprint"))
+				inst->pNetOssl->authMode = OSSL_AUTH_CERTFINGERPRINT;
+			else if(!strcasecmp(pszAuthMode, "name"))
+				inst->pNetOssl->authMode = OSSL_AUTH_CERTNAME;
+			else if(!strcasecmp(pszAuthMode, "certvalid"))
+				inst->pNetOssl->authMode = OSSL_AUTH_CERTVALID;
+			else
+				inst->pNetOssl->authMode = OSSL_AUTH_CERTANON;
+			free(pszAuthMode);
+		} else if(!strcmp(inppblk.descr[i].name, "tls.cacert")) {
+			inst->pNetOssl->pszCAFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+			fp = fopen((const char*)inst->pNetOssl->pszCAFile, "r");
+			if(fp == NULL) {
+				char errStr[1024];
+				rs_strerror_r(errno, errStr, sizeof(errStr));
+				LogError(0, RS_RET_NO_FILE_ACCESS,
+				"error: certificate file %s couldn't be accessed: %s\n",
+				inst->pNetOssl->pszCAFile, errStr);
+			} else {
+				fclose(fp);
+			}
+		} else if(!strcmp(inppblk.descr[i].name, "tls.mycert")) {
+			inst->pNetOssl->pszCertFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+			fp = fopen((const char*)inst->pNetOssl->pszCertFile, "r");
+			if(fp == NULL) {
+				char errStr[1024];
+				rs_strerror_r(errno, errStr, sizeof(errStr));
+				LogError(0, RS_RET_NO_FILE_ACCESS,
+				"error: certificate file %s couldn't be accessed: %s\n",
+				inst->pNetOssl->pszCertFile, errStr);
+			} else {
+				fclose(fp);
+			}
+		} else if(!strcmp(inppblk.descr[i].name, "tls.myprivkey")) {
+			inst->pNetOssl->pszKeyFile = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+			fp = fopen((const char*)inst->pNetOssl->pszKeyFile, "r");
+			if(fp == NULL) {
+				char errStr[1024];
+				rs_strerror_r(errno, errStr, sizeof(errStr));
+				LogError(0, RS_RET_NO_FILE_ACCESS,
+				"error: certificate file %s couldn't be accessed: %s\n",
+				inst->pNetOssl->pszKeyFile, errStr);
+			} else {
+				fclose(fp);
+			}
+		} else if(!strcmp(inppblk.descr[i].name, "tls.tlscfgcmd")) {
+			inst->tlscfgcmd = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+		} else if(!strcmp(inppblk.descr[i].name, "tls.permittedpeer")) {
+			for(j = 0 ; j <  pvals[i].val.d.ar->nmemb ; ++j) {
+				uchar *const peer = (uchar*) es_str2cstr(pvals[i].val.d.ar->arr[j], NULL);
+				CHKiRet(net.AddPermittedPeer(&inst->pPermPeersRoot, peer));
+				free(peer);
+			}
+		} else {
+			dbgprintf("imdtls: program error, non-handled "
+			  "param '%s'\n", inppblk.descr[i].name);
+		}
+	}
+	
+	/* check if no port is set. If not, we use DEFAULT of 4433 */
+	if(inst->pszBindPort == NULL) {
+		CHKmalloc(inst->pszBindPort = (uchar*)strdup("4433"));
+	}
+	inst->port = atoi((char*)inst->pszBindPort);
+	/* check if BinAddr is set. If not, we use DEFAULT of 0.0.0.0 */
+	if(inst->pszBindAddr == NULL) {
+		CHKmalloc(inst->pszBindAddr = (uchar*)strdup("0.0.0.0"));
+	}
+
+	// Assign Loaded Peers to Netossl
+	SetPermPeers(inst, inst->pPermPeersRoot);
+
+	/* all ok, ready to start up */
+	inst->bEnableLstn = -1;
+
+finalize_it:
+CODE_STD_FINALIZERnewInpInst
+	cnfparamvalsDestruct(pvals, &inppblk);
+ENDnewInpInst
+
+
+BEGINbeginCnfLoad
+CODESTARTbeginCnfLoad
+	loadModConf = pModConf;
+	pModConf->pConf = pConf;
+	pModConf->pszBindRuleset = NULL;
+	pModConf->drvrAuthMode = OSSL_AUTH_CERTANON;
+	/* init legacy config variables */
+	cs.pszBindRuleset = NULL;
+ENDbeginCnfLoad
+
+
+BEGINsetModCnf
+	struct cnfparamvals *pvals = NULL;
+	int i;
+CODESTARTsetModCnf
+	pvals = nvlstGetParams(lst, &modpblk, NULL);
+	if(pvals == NULL) {
+		LogError(0, RS_RET_MISSING_CNFPARAMS, "imdtls: error processing module "
+				"config parameters [module(...)]");
+		ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS);
+	}
+
+	if(Debug) {
+		dbgprintf("module (global) param blk for imdtls:\n");
+		cnfparamsPrint(&modpblk, pvals);
+	}
+
+	for(i = 0 ; i < modpblk.nParams ; ++i) {
+		if(!pvals[i].bUsed)
+			continue;
+		if(!strcmp(modpblk.descr[i].name, "tls.authmode")) {
+			char* pszAuthMode = es_str2cstr(pvals[i].val.d.estr, NULL);
+			if(!strcasecmp(pszAuthMode, "fingerprint"))
+				loadModConf->drvrAuthMode = OSSL_AUTH_CERTFINGERPRINT;
+			else if(!strcasecmp(pszAuthMode, "name"))
+				loadModConf->drvrAuthMode = OSSL_AUTH_CERTNAME;
+			else if(!strcasecmp(pszAuthMode, "certvalid"))
+				loadModConf->drvrAuthMode = OSSL_AUTH_CERTVALID;
+			else
+				loadModConf->drvrAuthMode = OSSL_AUTH_CERTANON;
+			free(pszAuthMode);
+		} else if(!strcmp(modpblk.descr[i].name, "ruleset")) {
+			loadModConf->pszBindRuleset = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL);
+		} else {
+			dbgprintf("imdtls: program error, non-handled "
+			  "param '%s' in beginCnfLoad\n", modpblk.descr[i].name);
+		}
+	}
+finalize_it:
+	if(pvals != NULL)
+		cnfparamvalsDestruct(pvals, &modpblk);
+ENDsetModCnf
+
+
+BEGINendCnfLoad
+CODESTARTendCnfLoad
+	if(loadModConf->pszBindRuleset == NULL) {
+		if((cs.pszBindRuleset == NULL) || (cs.pszBindRuleset[0] == '\0')) {
+			loadModConf->pszBindRuleset = NULL;
+		} else {
+			CHKmalloc(loadModConf->pszBindRuleset = ustrdup(cs.pszBindRuleset));
+		}
+	} else {
+		if((cs.pszBindRuleset != NULL) && (cs.pszBindRuleset[0] != '\0')) {
+			LogError(0, RS_RET_DUP_PARAM, "imdtls: ruleset "
+					"set via legacy directive ignored");
+		}
+	}
+finalize_it:
+	free(cs.pszBindRuleset);
+	cs.pszBindRuleset = NULL;
+	loadModConf = NULL; /* done loading */
+ENDendCnfLoad
+
+
+BEGINcheckCnf
+	instanceConf_t *inst;
+CODESTARTcheckCnf
+	for(inst = pModConf->root ; inst != NULL ; inst = inst->next) {
+		if(inst->pszBindRuleset == NULL && pModConf->pszBindRuleset != NULL) {
+			CHKmalloc(inst->pszBindRuleset = ustrdup(pModConf->pszBindRuleset));
+		}
+		std_checkRuleset(pModConf, inst);
+	}
+finalize_it:
+ENDcheckCnf
+
+
+BEGINactivateCnfPrePrivDrop
+	instanceConf_t *inst;
+CODESTARTactivateCnfPrePrivDrop
+	runModConf = pModConf;
+	DBGPRINTF("imdtls: activate addListners for dtls\n");
+	for(inst = runModConf->root ; inst != NULL ; inst = inst->next) {
+		addListner(pModConf, inst);
+	}
+ENDactivateCnfPrePrivDrop
+
+BEGINactivateCnf
+CODESTARTactivateCnf
+ENDactivateCnf
+
+
+BEGINfreeCnf
+	instanceConf_t *inst, *del;
+	int i;
+CODESTARTfreeCnf
+	for(inst = pModConf->root ; inst != NULL ; ) {
+		free(inst->pszBindPort);
+		if (inst->pszBindAddr != NULL) {
+			free(inst->pszBindAddr);
+		}
+		free(inst->pszBindRuleset);
+		free(inst->pszInputName);
+
+		// --- CleanUP OpenSSL ressources
+		// Remove SSL CLients
+		if(inst->dtlsClients != NULL) {
+			for (i = 0; i < MAX_DTLS_CLIENTS; ++i) {
+				DTLScleanupSession(inst, i);
+				free(inst->dtlsClients[i]);
+			}
+			free(inst->dtlsClients);
+		}
+
+		// DeConstruct pNetOssl helper
+		net_ossl.Destruct(&inst->pNetOssl);
+
+		// ---
+
+		if(inst->pPermPeersRoot != NULL) {
+			net.DestructPermittedPeers(&inst->pPermPeersRoot);
+		}
+
+		if(inst->bEnableLstn) {
+			prop.Destruct(&inst->pInputName);
+			statsobj.Destruct(&(inst->stats));
+		}
+		del = inst;
+		inst = inst->next;
+		free(del);
+	}
+	free(pModConf->pszBindRuleset);
+ENDfreeCnf
+
+
+
+/* This function is called to gather input.
+ * In essence, it just starts the pool of workers. To save resources,
+ * we run one of the workers on our own thread -- otherwise that thread would
+ * just idle around and wait for the workers to finish.
+ */
+BEGINrunInput
+	instanceConf_t *inst;
+	pthread_attr_t wrkrThrdAttr;
+CODESTARTrunInput
+	pthread_attr_init(&wrkrThrdAttr);
+	pthread_attr_setstacksize(&wrkrThrdAttr, 4096*1024);
+
+	DBGPRINTF("imdtls: create dtls handling threads\n");
+	for(inst = runModConf->root ; inst != NULL ; inst = inst->next) {
+		if(inst->bEnableLstn) {
+			pthread_create(&inst->tid, &wrkrThrdAttr, startDtlsHandler, inst);
+		}
+	}
+	pthread_attr_destroy(&wrkrThrdAttr);
+
+	DBGPRINTF("imdtls: starting to wait for close condition\n");
+	while(glbl.GetGlobalInputTermState() == 0) {
+		srSleep(0, 400000);
+	}
+
+	DBGPRINTF("imdtls: received close signal, signaling instance threads...\n");
+	for (inst = runModConf->root; inst != NULL; inst = inst->next) {
+		pthread_kill(inst->tid, SIGTTIN);
+		DTLSCloseSocket(inst);
+	}
+
+	DBGPRINTF("imdtls: threads signaled, waiting for join...");
+	for (inst = runModConf->root ; inst != NULL ; inst = inst->next) {
+		pthread_join(inst->tid, NULL);
+	}
+
+	DBGPRINTF("imdtls: finished threads, stopping\n");
+ENDrunInput
+
+
+BEGINwillRun
+CODESTARTwillRun
+	/* we need to create the inputName property (only once during our lifetime) */
+	CHKiRet(prop.Construct(&pInputName));
+	CHKiRet(prop.SetString(pInputName, UCHAR_CONSTANT("imdtls"), sizeof("imdtls") - 1));
+	CHKiRet(prop.ConstructFinalize(pInputName));
+finalize_it:
+ENDwillRun
+
+/* This function is called by the framework after runInput() has been terminated. It
+ * shall free any resources and prepare the module for unload.
+ * CODEqueryEtryPt_STD_IMOD_QUERIES
+ */
+BEGINafterRun
+CODESTARTafterRun
+	/* TODO: do cleanup here ?! */
+	dbgprintf("imdtls: AfterRun\n");
+	if(pInputName != NULL)
+		prop.Destruct(&pInputName);
+ENDafterRun
+
+BEGINmodExit
+CODESTARTmodExit
+	DBGPRINTF("imdtls: modExit\n");
+	/* release objects we used */
+	objRelease(net_ossl, LM_NET_OSSL_FILENAME);
+	objRelease(statsobj, CORE_COMPONENT);
+	objRelease(ruleset, CORE_COMPONENT);
+	objRelease(datetime, CORE_COMPONENT);
+	objRelease(prop, CORE_COMPONENT);
+	objRelease(net, LM_NET_FILENAME);
+	objRelease(glbl, CORE_COMPONENT);
+ENDmodExit
+
+BEGINisCompatibleWithFeature
+CODESTARTisCompatibleWithFeature
+	if(eFeat == sFEATURENonCancelInputTermination)
+		iRet = RS_RET_OK;
+ENDisCompatibleWithFeature
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_IMOD_QUERIES
+CODEqueryEtryPt_STD_CONF2_QUERIES
+CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES
+CODEqueryEtryPt_STD_CONF2_PREPRIVDROP_QUERIES
+CODEqueryEtryPt_STD_CONF2_IMOD_QUERIES
+CODEqueryEtryPt_IsCompatibleWithFeature_IF_OMOD_QUERIES
+ENDqueryEtryPt
+
+BEGINmodInit()
+CODESTARTmodInit
+	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
+CODEmodInit_QueryRegCFSLineHdlr
+	DBGPRINTF("imdtls: modInit\n");
+	/* request objects we use */
+	CHKiRet(objUse(glbl, CORE_COMPONENT));
+	CHKiRet(objUse(prop, CORE_COMPONENT));
+	CHKiRet(objUse(net, LM_NET_FILENAME));
+	CHKiRet(objUse(net_ossl, LM_NET_OSSL_FILENAME));
+	CHKiRet(objUse(datetime, CORE_COMPONENT));
+	CHKiRet(objUse(ruleset, CORE_COMPONENT));
+	CHKiRet(objUse(statsobj, CORE_COMPONENT));
+ENDmodInit