Imported Upstream version 3.20.2upstream/3.20.2

1 files changed, 92 insertions, 0 deletions

diff --git a/runtime/nsd_gtls.h b/runtime/nsd_gtls.h
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+++ b/runtime/nsd_gtls.h
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+/* An implementation of the nsd interface for GnuTLS.
+ *
+ * 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.
+ */
+
+#ifndef INCLUDED_NSD_GTLS_H
+#define INCLUDED_NSD_GTLS_H
+
+#include "nsd.h"
+
+#define NSD_GTLS_MAX_RCVBUF 8 * 1024 /* max size of buffer for message reception */
+
+typedef enum {
+	gtlsRtry_None = 0,	/**< no call needs to be retried */
+	gtlsRtry_handshake = 1,
+	gtlsRtry_recv = 2
+} gtlsRtryCall_t;		/**< IDs of calls that needs to be retried */
+
+typedef nsd_if_t nsd_gtls_if_t; /* we just *implement* this interface */
+
+/* the nsd_gtls object */
+struct nsd_gtls_s {
+	BEGINobjInstance;	/* Data to implement generic object - MUST be the first data element! */
+	nsd_t *pTcp;		/**< our aggregated nsd_ptcp data */
+	uchar *pszConnectHost;	/**< hostname used for connect - may be used to authenticate peer if no other name given */
+	int iMode;		/* 0 - plain tcp, 1 - TLS */
+	int bAbortConn;		/* if set, abort conncection (fatal error had happened) */
+	enum { 
+		GTLS_AUTH_CERTNAME = 0,
+		GTLS_AUTH_CERTFINGERPRINT = 1,
+		GTLS_AUTH_CERTVALID = 2,
+		GTLS_AUTH_CERTANON = 3
+	} authMode;
+	gtlsRtryCall_t rtryCall;/**< what must we retry? */
+	int bIsInitiator;	/**< 0 if socket is the server end (listener), 1 if it is the initiator */
+	gnutls_session sess;
+	int bHaveSess;		/* as we don't know exactly which gnutls_session values are invalid, we use this one
+				   to flag whether or not we are in a session (same as -1 for a socket meaning no sess) */
+	int bReportAuthErr;	/* only the first auth error is to be reported, this var triggers it. Initially, it is
+				 * set to 1 and changed to 0 after the first report. It is changed back to 1 after
+				 * one successful authentication. */
+	permittedPeers_t *pPermPeers; /* permitted peers */
+	gnutls_x509_crt ourCert;	/**< our certificate, if in client mode (unused in server mode) */
+	gnutls_x509_privkey ourKey;	/**< our private key, if in client mode (unused in server mode) */
+	short	bOurCertIsInit;	/**< 1 if our certificate is initialized and must be deinit on destruction */
+	short	bOurKeyIsInit;	/**< 1 if our private key is initialized and must be deinit on destruction */
+	char *pszRcvBuf;
+	int lenRcvBuf;		/**< -1: empty, 0: connection closed, 1..NSD_GTLS_MAX_RCVBUF-1: data of that size present */
+	int ptrRcvBuf;		/**< offset for next recv operation if 0 < lenRcvBuf < NSD_GTLS_MAX_RCVBUF */
+};
+
+/* interface is defined in nsd.h, we just implement it! */
+#define nsd_gtlsCURR_IF_VERSION nsdCURR_IF_VERSION
+
+/* prototypes */
+PROTOTYPEObj(nsd_gtls);
+/* some prototypes for things used by our nsdsel_gtls helper class */
+uchar *gtlsStrerror(int error);
+rsRetVal gtlsChkPeerAuth(nsd_gtls_t *pThis);
+rsRetVal gtlsRecordRecv(nsd_gtls_t *pThis);
+static inline rsRetVal gtlsHasRcvInBuffer(nsd_gtls_t *pThis) {
+	/* we have a valid receive buffer one such is allocated and 
+	 * NOT exhausted!
+	 */
+	dbgprintf("hasRcvInBuffer on nsd %p: pszRcvBuf %p, lenRcvBuf %d\n", pThis,
+		pThis->pszRcvBuf, pThis->lenRcvBuf);
+	return(pThis->pszRcvBuf != NULL && pThis->lenRcvBuf != -1);
+	}
+
+
+/* the name of our library binary */
+#define LM_NSD_GTLS_FILENAME "lmnsd_gtls"
+
+#endif /* #ifndef INCLUDED_NSD_GTLS_H */