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Diffstat (limited to 'runtime/nsd_gtls.h')
| -rw-r--r-- | runtime/nsd_gtls.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/runtime/nsd_gtls.h b/runtime/nsd_gtls.h new file mode 100644 index 00000000..52eea8ee --- /dev/null +++ b/runtime/nsd_gtls.h @@ -0,0 +1,92 @@ +/* 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 */ |