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55e01da2ec
...by doing a connection check before sending. Credits to Martin Schuette for providing the idea. Details are available at http://blog.gerhards.net/2008/06/reliable-plain-tcp-syslog-once-again.html
74 lines
3.3 KiB
C
74 lines
3.3 KiB
C
/* Definitions for the stream-based netstrmworking class.
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*
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* Copyright 2007, 2008 Rainer Gerhards and Adiscon GmbH.
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*
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* This file is part of the rsyslog runtime library.
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*
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* The rsyslog runtime library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* The rsyslog runtime library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
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*
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* A copy of the GPL can be found in the file "COPYING" in this distribution.
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* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
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*/
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#ifndef INCLUDED_NETSTRM_H
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#define INCLUDED_NETSTRM_H
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#include "netstrms.h"
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/* the netstrm object */
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struct netstrm_s {
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BEGINobjInstance; /* Data to implement generic object - MUST be the first data element! */
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nsd_t *pDrvrData; /**< the driver's data elements (at most other places, this is called pNsd) */
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nsd_if_t Drvr; /**< our stream driver */
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netstrms_t *pNS; /**< pointer to our netstream subsystem object */
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};
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/* interface */
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BEGINinterface(netstrm) /* name must also be changed in ENDinterface macro! */
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rsRetVal (*Construct)(netstrm_t **ppThis);
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rsRetVal (*ConstructFinalize)(netstrm_t *pThis);
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rsRetVal (*Destruct)(netstrm_t **ppThis);
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rsRetVal (*AbortDestruct)(netstrm_t **ppThis);
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rsRetVal (*LstnInit)(netstrms_t *pNS, void *pUsr, rsRetVal(*)(void*,netstrm_t*),
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uchar *pLstnPort, uchar *pLstnIP, int iSessMax);
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rsRetVal (*AcceptConnReq)(netstrm_t *pThis, netstrm_t **ppNew);
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rsRetVal (*Rcv)(netstrm_t *pThis, uchar *pRcvBuf, ssize_t *pLenBuf);
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rsRetVal (*Send)(netstrm_t *pThis, uchar *pBuf, ssize_t *pLenBuf);
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rsRetVal (*Connect)(netstrm_t *pThis, int family, unsigned char *port, unsigned char *host);
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rsRetVal (*GetRemoteHName)(netstrm_t *pThis, uchar **pszName);
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rsRetVal (*GetRemoteIP)(netstrm_t *pThis, uchar **pszIP);
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rsRetVal (*SetDrvrMode)(netstrm_t *pThis, int iMode);
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rsRetVal (*SetDrvrAuthMode)(netstrm_t *pThis, uchar*);
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rsRetVal (*SetDrvrPermPeers)(netstrm_t *pThis, permittedPeers_t*);
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void (*CheckConnection)(netstrm_t *pThis); /* This is a trick mostly for plain tcp syslog */
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/* the GetSock() below is a hack to make imgssapi work. In the long term,
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* we should migrate imgssapi to a stream driver, which will relieve us of
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* this problem. Please note that nobody else should use GetSock(). Using it
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* will also tie the caller to nsd_ptcp, because other drivers may not support
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* it at all. Once the imgssapi problem is solved, GetSock should be removed from
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* this interface. -- rgerhards, 2008-05-05
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*/
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rsRetVal (*GetSock)(netstrm_t *pThis, int *pSock);
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ENDinterface(netstrm)
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#define netstrmCURR_IF_VERSION 2 /* increment whenever you change the interface structure! */
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/* prototypes */
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PROTOTYPEObj(netstrm);
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/* the name of our library binary */
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#define LM_NETSTRM_FILENAME LM_NETSTRMS_FILENAME
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#endif /* #ifndef INCLUDED_NETSTRM_H */
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