Adding upstream version 8.2402.0.upstream/8.2402.0

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

3 files changed, 1626 insertions, 0 deletions

diff --git a/plugins/imgssapi/Makefile.am b/plugins/imgssapi/Makefile.am
new file mode 100644
index 0000000..ea01635
--- /dev/null
+++ b/plugins/imgssapi/Makefile.am
@@ -0,0 +1,6 @@
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+
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+imgssapi_la_LDFLAGS = -module -avoid-version
+imgssapi_la_LIBADD = $(GSS_LIBS)
diff --git a/plugins/imgssapi/Makefile.in b/plugins/imgssapi/Makefile.in
new file mode 100644
index 0000000..4b920e6
--- /dev/null
+++ b/plugins/imgssapi/Makefile.in
@@ -0,0 +1,797 @@
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+mostlyclean-libtool:
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+	      $$unique; \
+	  fi; \
+	fi
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+
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+	  if test -f "$$i"; then \
+	    echo "$(subdir)/$$i"; \
+	  else \
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+	  fi; \
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+
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+			   sort -u` ;; \
+	esac; \
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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/imgssapi/imgssapi.c b/plugins/imgssapi/imgssapi.c
new file mode 100644
index 0000000..65eceb9
--- /dev/null
+++ b/plugins/imgssapi/imgssapi.c
@@ -0,0 +1,823 @@
+/* imgssapi.c
+ * This is the implementation of the GSSAPI input module.
+ *
+ * Note: the root gssapi code was contributed by varmojfekoj and is most often
+ * maintened by him. I am just doing the plumbing around it (I event don't have a
+ * test lab for gssapi yet... ). I am very grateful for this useful code
+ * contribution -- rgerhards, 2008-03-05
+ *
+ * NOTE: read comments in module-template.h to understand how this file
+ *       works!
+ *
+ * Copyright 2007, 2017 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of rsyslog.
+ *
+ * Rsyslog is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Rsyslog 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Rsyslog.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <ctype.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#if HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+#include <gssapi/gssapi.h>
+#include "rsyslog.h"
+#include "dirty.h"
+#include "cfsysline.h"
+#include "module-template.h"
+#include "unicode-helper.h"
+#include "net.h"
+#include "srUtils.h"
+#include "gss-misc.h"
+#include "tcpsrv.h"
+#include "tcps_sess.h"
+#include "errmsg.h"
+#include "netstrm.h"
+#include "glbl.h"
+#include "debug.h"
+#include "unlimited_select.h"
+#include "rsconf.h"
+
+MODULE_TYPE_INPUT
+MODULE_TYPE_NOKEEP
+
+/* defines */
+#define ALLOWEDMETHOD_GSS 2
+#define ALLOWEDMETHOD_TCP 1
+
+
+/* some forward definitions - they may go away when we no longer include imtcp.c */
+static rsRetVal addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal);
+static rsRetVal actGSSListener(uchar *port);
+static int TCPSessGSSInit(void);
+static void TCPSessGSSClose(tcps_sess_t* pSess);
+static rsRetVal TCPSessGSSRecv(tcps_sess_t *pSess, void *buf, size_t buf_len, ssize_t *);
+static rsRetVal onSessAccept(tcpsrv_t *pThis, tcps_sess_t *ppSess);
+static rsRetVal OnSessAcceptGSS(tcpsrv_t *pThis, tcps_sess_t *ppSess);
+
+/* static data */
+DEF_IMOD_STATIC_DATA
+DEFobjCurrIf(tcpsrv)
+DEFobjCurrIf(tcps_sess)
+DEFobjCurrIf(gssutil)
+DEFobjCurrIf(netstrm)
+DEFobjCurrIf(net)
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(prop)
+
+static tcpsrv_t *pOurTcpsrv = NULL;  /* our TCP server(listener) TODO: change for multiple instances */
+static gss_cred_id_t gss_server_creds = GSS_C_NO_CREDENTIAL;
+static uchar *srvPort;
+
+/* our usr structure for the tcpsrv object */
+typedef struct gsssrv_s {
+	char allowedMethods;
+} gsssrv_t;
+
+/* our usr structure for the session object */
+typedef struct gss_sess_s {
+	OM_uint32 gss_flags;
+	gss_ctx_id_t gss_context;
+	char allowedMethods;
+} gss_sess_t;
+
+
+/* config variables */
+struct modConfData_s {
+	EMPTY_STRUCT;
+};
+
+static uchar *pszLstnPortFileName = NULL;	/* file for dynamic port */
+static int iTCPSessMax = 200; /* max number of sessions */
+static char *gss_listen_service_name = NULL;
+static int bPermitPlainTcp = 0; /* plain tcp syslog allowed on GSSAPI port? */
+static int bKeepAlive = 0; /* use SO_KEEPALIVE? */
+
+
+/* methods */
+/* callbacks */
+static rsRetVal OnSessConstructFinalize(void *ppUsr)
+{
+	DEFiRet;
+	gss_sess_t **ppGSess = (gss_sess_t**) ppUsr;
+	gss_sess_t *pGSess;
+
+	assert(ppGSess != NULL);
+
+	if((pGSess = calloc(1, sizeof(gss_sess_t))) == NULL)
+		ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+
+	pGSess->gss_flags = 0;
+	pGSess->gss_context = GSS_C_NO_CONTEXT;
+	pGSess->allowedMethods = 0;
+
+	*ppGSess = pGSess;
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* Destruct the user session pointer for a GSSAPI session. Please note
+ * that it *is* valid to receive a NULL user pointer. In this case, the
+ * sessions is to be torn down before it was fully initialized. This
+ * happens in error cases, e.g. when the host ACL did not match.
+ * rgerhards, 2008-03-03
+ */
+static rsRetVal
+OnSessDestruct(void *ppUsr)
+{
+	DEFiRet;
+	gss_sess_t **ppGSess = (gss_sess_t**) ppUsr;
+
+	assert(ppGSess != NULL);
+	if(*ppGSess == NULL)
+		FINALIZE;
+
+	if((*ppGSess)->allowedMethods & ALLOWEDMETHOD_GSS) {
+		OM_uint32 maj_stat, min_stat;
+		maj_stat = gss_delete_sec_context(&min_stat, &(*ppGSess)->gss_context, GSS_C_NO_BUFFER);
+		if (maj_stat != GSS_S_COMPLETE)
+			gssutil.display_status((char*)"deleting context", maj_stat, min_stat);
+	}
+
+	free(*ppGSess);
+	*ppGSess = NULL;
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* Check if the host is permitted to send us messages.
+ * Note: the pUsrSess may be zero if the server is running in tcp-only mode!
+ */
+static int
+isPermittedHost(struct sockaddr *addr, char *fromHostFQDN, void *pUsrSrv, void*pUsrSess)
+{
+	gsssrv_t *pGSrv;
+	gss_sess_t *pGSess;
+	char allowedMethods = 0;
+
+	assert(pUsrSrv != NULL);
+	pGSrv = (gsssrv_t*) pUsrSrv;
+	pGSess = (gss_sess_t*) pUsrSess;
+
+	if((pGSrv->allowedMethods & ALLOWEDMETHOD_TCP) &&
+	   net.isAllowedSender2((uchar*)"TCP", addr, (char*)fromHostFQDN, 1))
+		allowedMethods |= ALLOWEDMETHOD_TCP;
+	if((pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) &&
+	   net.isAllowedSender2((uchar*)"GSS", addr, (char*)fromHostFQDN, 1))
+		allowedMethods |= ALLOWEDMETHOD_GSS;
+	if(allowedMethods && pGSess != NULL)
+		pGSess->allowedMethods = allowedMethods;
+	return allowedMethods;
+}
+
+
+static rsRetVal
+onSessAccept(tcpsrv_t *pThis, tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gsssrv_t *pGSrv;
+
+	pGSrv = (gsssrv_t*) pThis->pUsr;
+
+	if(pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) {
+		iRet = OnSessAcceptGSS(pThis, pSess);
+	}
+
+	RETiRet;
+}
+
+
+static rsRetVal
+onRegularClose(tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	if(pGSess->allowedMethods & ALLOWEDMETHOD_GSS)
+		TCPSessGSSClose(pSess);
+	else {
+		/* process any incomplete frames left over */
+		tcps_sess.PrepareClose(pSess);
+		/* Session closed */
+		tcps_sess.Close(pSess);
+	}
+	RETiRet;
+}
+
+
+static rsRetVal
+onErrClose(tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	if(pGSess->allowedMethods & ALLOWEDMETHOD_GSS)
+		TCPSessGSSClose(pSess);
+	else
+		tcps_sess.Close(pSess);
+
+	RETiRet;
+}
+
+
+/* open the listen sockets */
+static rsRetVal
+doOpenLstnSocks(tcpsrv_t *pSrv)
+{
+	gsssrv_t *pGSrv;
+	DEFiRet;
+
+	ISOBJ_TYPE_assert(pSrv, tcpsrv);
+	pGSrv = pSrv->pUsr;
+	assert(pGSrv != NULL);
+
+	/* first apply some config settings */
+	if(pGSrv->allowedMethods) {
+		if(pGSrv->allowedMethods & ALLOWEDMETHOD_GSS) {
+			if(TCPSessGSSInit()) {
+				LogError(0, NO_ERRCODE, "GSS-API initialization failed\n");
+				pGSrv->allowedMethods &= ~(ALLOWEDMETHOD_GSS);
+			}
+		}
+		if(pGSrv->allowedMethods) {
+			/* fallback to plain TCP */
+			CHKiRet(tcpsrv.create_tcp_socket(pSrv));
+		} else {
+			ABORT_FINALIZE(RS_RET_GSS_ERR);
+		}
+	}
+
+finalize_it:
+	RETiRet;
+}
+
+
+static rsRetVal
+doRcvData(tcps_sess_t *pSess, char *buf, size_t lenBuf, ssize_t *piLenRcvd, int *const oserr)
+{
+	DEFiRet;
+	int allowedMethods;
+	gss_sess_t *pGSess;
+
+	assert(pSess != NULL);
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+	assert(piLenRcvd != NULL);
+
+	allowedMethods = pGSess->allowedMethods;
+	if(allowedMethods & ALLOWEDMETHOD_GSS) {
+		CHKiRet(TCPSessGSSRecv(pSess, buf, lenBuf, piLenRcvd));
+	} else {
+		*piLenRcvd = lenBuf;
+		CHKiRet(netstrm.Rcv(pSess->pStrm, (uchar*) buf, piLenRcvd, oserr));
+	}
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* end callbacks */
+
+static rsRetVal
+addGSSListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
+{
+	DEFiRet;
+
+	if((ustrcmp(pNewVal, UCHAR_CONSTANT("0")) == 0 && pszLstnPortFileName == NULL)
+			|| ustrcmp(pNewVal, UCHAR_CONSTANT("0")) < 0) {
+		CHKmalloc(srvPort = (uchar*)strdup("514"));
+	} else {
+		srvPort = pNewVal;
+	}
+
+finalize_it:
+	RETiRet;
+}
+
+static rsRetVal
+actGSSListener(uchar *port)
+{
+	DEFiRet;
+	tcpLstnParams_t *cnf_params = NULL;
+	gsssrv_t *pGSrv = NULL;
+
+	assert(pOurTcpsrv == NULL);
+	CHKmalloc(cnf_params = (tcpLstnParams_t*) calloc(1, sizeof(tcpLstnParams_t)));
+	/* first create/init the gsssrv "object" */
+	if((pGSrv = calloc(1, sizeof(gsssrv_t))) == NULL)
+		ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+
+	pGSrv->allowedMethods = ALLOWEDMETHOD_GSS;
+	if(bPermitPlainTcp)
+		pGSrv->allowedMethods |= ALLOWEDMETHOD_TCP;
+	/* gsssrv initialized */
+
+	CHKiRet(tcpsrv.Construct(&pOurTcpsrv));
+	CHKiRet(tcpsrv.SetUsrP(pOurTcpsrv, pGSrv));
+	CHKiRet(tcpsrv.SetCBOnSessConstructFinalize(pOurTcpsrv, OnSessConstructFinalize));
+	CHKiRet(tcpsrv.SetCBOnSessDestruct(pOurTcpsrv, OnSessDestruct));
+	CHKiRet(tcpsrv.SetCBIsPermittedHost(pOurTcpsrv, isPermittedHost));
+	CHKiRet(tcpsrv.SetCBRcvData(pOurTcpsrv, doRcvData));
+	CHKiRet(tcpsrv.SetCBOpenLstnSocks(pOurTcpsrv, doOpenLstnSocks));
+	CHKiRet(tcpsrv.SetCBOnSessAccept(pOurTcpsrv, onSessAccept));
+	CHKiRet(tcpsrv.SetCBOnRegularClose(pOurTcpsrv, onRegularClose));
+	CHKiRet(tcpsrv.SetCBOnErrClose(pOurTcpsrv, onErrClose));
+	CHKiRet(tcpsrv.SetInputName(pOurTcpsrv, cnf_params, UCHAR_CONSTANT("imgssapi")));
+	CHKiRet(tcpsrv.SetKeepAlive(pOurTcpsrv, bKeepAlive));
+	CHKiRet(tcpsrv.SetOrigin(pOurTcpsrv, UCHAR_CONSTANT("imgssapi")));
+	cnf_params->pszPort = port;
+	cnf_params->bSuppOctetFram = 1;
+	tcpsrv.configureTCPListen(pOurTcpsrv, cnf_params);
+	CHKiRet(tcpsrv.ConstructFinalize(pOurTcpsrv));
+	cnf_params = NULL;
+
+finalize_it:
+	if(iRet != RS_RET_OK) {
+		LogError(0, NO_ERRCODE, "error %d trying to add listener", iRet);
+		if(pOurTcpsrv != NULL)
+			tcpsrv.Destruct(&pOurTcpsrv);
+		free(pGSrv);
+	}
+	free(cnf_params);
+	RETiRet;
+}
+
+
+/* returns 0 if all went OK, -1 if it failed */
+static int TCPSessGSSInit(void)
+{
+	gss_buffer_desc name_buf;
+	gss_name_t server_name;
+	OM_uint32 maj_stat, min_stat;
+
+	if (gss_server_creds != GSS_C_NO_CREDENTIAL)
+		return 0;
+
+	name_buf.value = (gss_listen_service_name == NULL) ? (char*)"host" : gss_listen_service_name;
+	name_buf.length = strlen(name_buf.value) + 1;
+	maj_stat = gss_import_name(&min_stat, &name_buf, GSS_C_NT_HOSTBASED_SERVICE, &server_name);
+	if (maj_stat != GSS_S_COMPLETE) {
+		gssutil.display_status((char*)"importing name", maj_stat, min_stat);
+		return -1;
+	}
+
+	maj_stat = gss_acquire_cred(&min_stat, server_name, 0,
+				    GSS_C_NULL_OID_SET, GSS_C_ACCEPT,
+				    &gss_server_creds, NULL, NULL);
+	if (maj_stat != GSS_S_COMPLETE) {
+		gssutil.display_status((char*)"acquiring credentials", maj_stat, min_stat);
+		return -1;
+	}
+
+	gss_release_name(&min_stat, &server_name);
+	dbgprintf("GSS-API initialized\n");
+	return 0;
+}
+
+
+/* returns 0 if all went OK, -1 if it failed
+ * tries to guess if the connection uses gssapi.
+ */
+static rsRetVal
+OnSessAcceptGSS(tcpsrv_t *pThis, tcps_sess_t *pSess)
+{
+	DEFiRet;
+	gss_buffer_desc send_tok, recv_tok;
+	gss_name_t client;
+	OM_uint32 maj_stat, min_stat, acc_sec_min_stat;
+	gss_ctx_id_t *context;
+	OM_uint32 *sess_flags;
+	int fdSess;
+	char allowedMethods;
+	gsssrv_t *pGSrv;
+	gss_sess_t *pGSess;
+	uchar *pszPeer = NULL;
+	int lenPeer = 0;
+	char *buf = NULL;
+
+	assert(pSess != NULL);
+
+	pGSrv = (gsssrv_t*) pThis->pUsr;
+	pGSess = (gss_sess_t*) pSess->pUsr;
+	allowedMethods = pGSrv->allowedMethods;
+	if(allowedMethods & ALLOWEDMETHOD_GSS) {
+		int ret = 0;
+		const size_t bufsize = glbl.GetMaxLine(runConf);
+		CHKmalloc(buf = (char*) malloc(bufsize + 1));
+
+		prop.GetString(pSess->fromHostIP, &pszPeer, &lenPeer);
+
+		dbgprintf("GSS-API Trying to accept TCP session %p from %s\n", pSess, (char *)pszPeer);
+
+		CHKiRet(netstrm.GetSock(pSess->pStrm, &fdSess)); // TODO: method access!
+		if (allowedMethods & ALLOWEDMETHOD_TCP) {
+			int len;
+			struct timeval tv;
+#ifdef USE_UNLIMITED_SELECT
+			fd_set *pFds = malloc(glbl.GetFdSetSize());
+#else
+			fd_set fds;
+			fd_set *pFds = &fds;
+#endif
+
+			do {
+				FD_ZERO(pFds);
+				FD_SET(fdSess, pFds);
+				tv.tv_sec = 1;
+				tv.tv_usec = 0;
+				ret = select(fdSess + 1, pFds, NULL, NULL, &tv);
+			} while (ret < 0 && errno == EINTR);
+			if (ret < 0) {
+				LogError(0, RS_RET_ERR, "TCP session %p from %s will be "
+						"closed, error ignored\n", pSess, (char *)pszPeer);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			} else if (ret == 0) {
+				dbgprintf("GSS-API Reverting to plain TCP\n");
+				pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+				ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+			}
+
+			do {
+				ret = recv(fdSess, buf, bufsize, MSG_PEEK);
+			} while (ret < 0 && errno == EINTR);
+			if (ret <= 0) {
+				if (ret == 0) {
+					dbgprintf("GSS-API Connection closed by peer %s\n", (char *)pszPeer);
+				} else {
+					LogError(0, RS_RET_ERR, "TCP(GSS) session %p from %s will be closed, "
+					"error ignored\n", pSess, (char *)pszPeer);
+				}
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			}
+
+			if (ret < 4) {
+				dbgprintf("GSS-API Reverting to plain TCP from %s\n", (char *)pszPeer);
+				pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+				ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+			} else if (ret == 4) {
+				/* The client might has been interupted after sending
+				 * the data length (4B), give him another chance.
+				 */
+				srSleep(1, 0);
+				do {
+					ret = recv(fdSess, buf, bufsize, MSG_PEEK);
+				} while (ret < 0 && errno == EINTR);
+				if (ret <= 0) {
+					if (ret == 0) {
+						dbgprintf("GSS-API Connection closed by peer %s\n", (char *)pszPeer);
+					} else {
+						LogError(0, NO_ERRCODE, "TCP session %p from %s will be "
+						"closed, error ignored\n", pSess, (char *)pszPeer);
+					}
+					ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+				}
+			}
+
+			/* TODO: how does this work together with IPv6? Does it? */
+			len = ntohl((buf[0] << 24)
+				    | (buf[1] << 16)
+				    | (buf[2] << 8)
+				    | buf[3]);
+			if ((ret - 4) < len || len == 0) {
+				dbgprintf("GSS-API Reverting to plain TCP from %s\n", (char *)pszPeer);
+				pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+				ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+			}
+
+			freeFdSet(pFds);
+		}
+
+		context = &pGSess->gss_context;
+		*context = GSS_C_NO_CONTEXT;
+		sess_flags = &pGSess->gss_flags;
+		do {
+			if (gssutil.recv_token(fdSess, &recv_tok) <= 0) {
+				LogError(0, NO_ERRCODE, "TCP session %p from %s will be "
+						"closed, error ignored\n", pSess, (char *)pszPeer);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			}
+			maj_stat = gss_accept_sec_context(&acc_sec_min_stat, context, gss_server_creds,
+							  &recv_tok, GSS_C_NO_CHANNEL_BINDINGS, &client,
+							  NULL, &send_tok, sess_flags, NULL, NULL);
+			if (recv_tok.value) {
+				free(recv_tok.value);
+				recv_tok.value = NULL;
+			}
+			if (maj_stat != GSS_S_COMPLETE && maj_stat != GSS_S_CONTINUE_NEEDED) {
+				gss_release_buffer(&min_stat, &send_tok);
+				if (*context != GSS_C_NO_CONTEXT)
+					gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+				if ((allowedMethods & ALLOWEDMETHOD_TCP) &&
+				    (GSS_ROUTINE_ERROR(maj_stat) == GSS_S_DEFECTIVE_TOKEN)) {
+					dbgprintf("GSS-API Reverting to plain TCP from %s\n", (char *)pszPeer);
+					dbgprintf("tcp session socket with new data: #%d\n", fdSess);
+					if(tcps_sess.DataRcvd(pSess, buf, ret) != RS_RET_OK) {
+						LogError(0, NO_ERRCODE, "Tearing down TCP "
+							"Session %p from %s - see previous messages "
+							"for reason(s)\n", pSess, (char *)pszPeer);
+						ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+					}
+					pGSess->allowedMethods = ALLOWEDMETHOD_TCP;
+					ABORT_FINALIZE(RS_RET_OK); // TODO: define good error codes
+				}
+				gssutil.display_status((char*)"accepting context", maj_stat, acc_sec_min_stat);
+				ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+			}
+			if (send_tok.length != 0) {
+				if(gssutil.send_token(fdSess, &send_tok) < 0) {
+					gss_release_buffer(&min_stat, &send_tok);
+					LogError(0, NO_ERRCODE, "TCP session %p from %s will be "
+							"closed, error ignored\n", pSess, (char *)pszPeer);
+					if (*context != GSS_C_NO_CONTEXT)
+						gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+					ABORT_FINALIZE(RS_RET_ERR); // TODO: define good error codes
+				}
+				gss_release_buffer(&min_stat, &send_tok);
+			}
+		} while (maj_stat == GSS_S_CONTINUE_NEEDED);
+
+		maj_stat = gss_display_name(&min_stat, client, &recv_tok, NULL);
+		if (maj_stat != GSS_S_COMPLETE) {
+			gssutil.display_status((char*)"displaying name", maj_stat, min_stat);
+		} else {
+			dbgprintf("GSS-API Accepted connection from peer %s: %s\n", (char *)pszPeer,
+				(char*) recv_tok.value);
+		}
+		gss_release_name(&min_stat, &client);
+		gss_release_buffer(&min_stat, &recv_tok);
+
+		dbgprintf("GSS-API Provided context flags:\n");
+		gssutil.display_ctx_flags(*sess_flags);
+		pGSess->allowedMethods = ALLOWEDMETHOD_GSS;
+	}
+
+finalize_it:
+	free(buf);
+	RETiRet;
+}
+
+
+/* Replaces recv() for gssapi connections.
+ */
+rsRetVal TCPSessGSSRecv(tcps_sess_t *pSess, void *buf, size_t buf_len, ssize_t *piLenRcvd)
+{
+	DEFiRet;
+	gss_buffer_desc xmit_buf, msg_buf;
+	gss_ctx_id_t *context;
+	OM_uint32 maj_stat, min_stat;
+	int fdSess;
+	int     conf_state;
+	gss_sess_t *pGSess;
+
+	assert(pSess->pUsr != NULL);
+	assert(piLenRcvd != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	netstrm.GetSock(pSess->pStrm, &fdSess); // TODO: method access, CHKiRet!
+	if(gssutil.recv_token(fdSess, &xmit_buf) <= 0)
+		ABORT_FINALIZE(RS_RET_GSS_ERR);
+
+	context = &pGSess->gss_context;
+	maj_stat = gss_unwrap(&min_stat, *context, &xmit_buf, &msg_buf,
+			      &conf_state, (gss_qop_t *) NULL);
+	if(maj_stat != GSS_S_COMPLETE) {
+		gssutil.display_status((char*)"unsealing message", maj_stat, min_stat);
+		if(xmit_buf.value) {
+			free(xmit_buf.value);
+			xmit_buf.value = 0;
+		}
+		ABORT_FINALIZE(RS_RET_GSS_ERR);
+	}
+	if (xmit_buf.value) {
+		free(xmit_buf.value);
+		xmit_buf.value = 0;
+	}
+
+	*piLenRcvd = msg_buf.length < buf_len ? msg_buf.length : buf_len;
+	memcpy(buf, msg_buf.value, *piLenRcvd);
+	gss_release_buffer(&min_stat, &msg_buf);
+
+finalize_it:
+	RETiRet;
+}
+
+
+/* Takes care of cleaning up gssapi stuff and then calls
+ * TCPSessClose().
+ */
+void TCPSessGSSClose(tcps_sess_t* pSess)
+{
+	OM_uint32 maj_stat, min_stat;
+	gss_ctx_id_t *context;
+	gss_sess_t *pGSess;
+
+	assert(pSess->pUsr != NULL);
+	pGSess = (gss_sess_t*) pSess->pUsr;
+
+	context = &pGSess->gss_context;
+	maj_stat = gss_delete_sec_context(&min_stat, context, GSS_C_NO_BUFFER);
+	if (maj_stat != GSS_S_COMPLETE)
+		gssutil.display_status((char*)"deleting context", maj_stat, min_stat);
+	*context = GSS_C_NO_CONTEXT;
+	pGSess->gss_flags = 0;
+	pGSess->allowedMethods = 0;
+
+	tcps_sess.Close(pSess);
+}
+
+
+/* Counterpart of TCPSessGSSInit(). This is called to exit the GSS system
+ * at all. It is a server-based session exit.
+ */
+static rsRetVal
+TCPSessGSSDeinit(void)
+{
+	DEFiRet;
+	OM_uint32 maj_stat, min_stat;
+
+	if (gss_server_creds != GSS_C_NO_CREDENTIAL) {
+		maj_stat = gss_release_cred(&min_stat, &gss_server_creds);
+		if (maj_stat != GSS_S_COMPLETE)
+			gssutil.display_status((char*)"releasing credentials", maj_stat, min_stat);
+	}
+	RETiRet;
+}
+
+
+#if 0 /* can be used to integrate into new config system */
+BEGINbeginCnfLoad
+CODESTARTbeginCnfLoad
+ENDbeginCnfLoad
+
+
+BEGINendCnfLoad
+CODESTARTendCnfLoad
+ENDendCnfLoad
+
+
+BEGINcheckCnf
+CODESTARTcheckCnf
+ENDcheckCnf
+
+
+BEGINactivateCnf
+CODESTARTactivateCnf
+ENDactivateCnf
+
+
+BEGINfreeCnf
+CODESTARTfreeCnf
+ENDfreeCnf
+#endif
+
+/* This function is called to gather input.
+ */
+BEGINrunInput
+CODESTARTrunInput
+	/* This will fail if the priviledges are dropped. Should be
+	 * moved to the '*activateCnfPrePrivDrop' section eventually.
+	 */
+	actGSSListener(srvPort);
+
+	iRet = tcpsrv.Run(pOurTcpsrv);
+ENDrunInput
+
+
+/* initialize and return if will run or not */
+BEGINwillRun
+CODESTARTwillRun
+	if(srvPort == NULL)
+		ABORT_FINALIZE(RS_RET_NO_RUN);
+
+	net.PrintAllowedSenders(2); /* TCP */
+	net.PrintAllowedSenders(3); /* GSS */
+finalize_it:
+ENDwillRun
+
+
+
+BEGINmodExit
+CODESTARTmodExit
+	if(pOurTcpsrv != NULL)
+		iRet = tcpsrv.Destruct(&pOurTcpsrv);
+	TCPSessGSSDeinit();
+
+	/* release objects we used */
+	objRelease(tcps_sess, LM_TCPSRV_FILENAME);
+	objRelease(tcpsrv, LM_TCPSRV_FILENAME);
+	objRelease(gssutil, LM_GSSUTIL_FILENAME);
+	objRelease(glbl, CORE_COMPONENT);
+	objRelease(netstrm, LM_NETSTRM_FILENAME);
+	objRelease(net, LM_NET_FILENAME);
+	objRelease(prop, CORE_COMPONENT);
+ENDmodExit
+
+
+BEGINafterRun
+CODESTARTafterRun
+	/* do cleanup here */
+	net.clearAllowedSenders((uchar*)"TCP");
+	net.clearAllowedSenders((uchar*)"GSS");
+ENDafterRun
+
+
+BEGINisCompatibleWithFeature
+CODESTARTisCompatibleWithFeature
+	if(eFeat == sFEATURENonCancelInputTermination)
+		iRet = RS_RET_OK;
+ENDisCompatibleWithFeature
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_IMOD_QUERIES
+CODEqueryEtryPt_IsCompatibleWithFeature_IF_OMOD_QUERIES
+ENDqueryEtryPt
+
+
+static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
+{
+	if (gss_listen_service_name != NULL) {
+		free(gss_listen_service_name);
+		gss_listen_service_name = NULL;
+	}
+	if (pszLstnPortFileName != NULL) {
+		free(pszLstnPortFileName);
+		pszLstnPortFileName = NULL;
+	}
+	bPermitPlainTcp = 0;
+	iTCPSessMax = 200;
+	bKeepAlive = 0;
+	return RS_RET_OK;
+}
+
+
+BEGINmodInit()
+CODESTARTmodInit
+	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current definition */
+CODEmodInit_QueryRegCFSLineHdlr
+	pOurTcpsrv = NULL;
+	/* request objects we use */
+	CHKiRet(objUse(tcps_sess, LM_TCPSRV_FILENAME));
+	CHKiRet(objUse(tcpsrv, LM_TCPSRV_FILENAME));
+	CHKiRet(objUse(gssutil, LM_GSSUTIL_FILENAME));
+	CHKiRet(objUse(glbl, CORE_COMPONENT));
+	CHKiRet(objUse(netstrm, LM_NETSTRM_FILENAME));
+	CHKiRet(objUse(net, LM_NET_FILENAME));
+	CHKiRet(objUse(prop, CORE_COMPONENT));
+
+	/* register config file handlers */
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverpermitplaintcp", 0, eCmdHdlrBinary,
+				   NULL, &bPermitPlainTcp, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverrun", 0, eCmdHdlrGetWord,
+				   addGSSListener, NULL, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverservicename", 0, eCmdHdlrGetWord,
+				   NULL, &gss_listen_service_name, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgsslistenportfilename", 0, eCmdHdlrGetWord,
+				   NULL, &pszLstnPortFileName, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssservermaxsessions", 0, eCmdHdlrInt,
+				   NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputgssserverkeepalive", 0, eCmdHdlrBinary,
+				   NULL, &bKeepAlive, STD_LOADABLE_MODULE_ID));
+	CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
+		resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
+ENDmodInit
+
+/* vim:set ai:
+ */