mirror of
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260 lines
6.7 KiB
C
260 lines
6.7 KiB
C
/* nsd_gtls.c
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*
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* An implementation of the nsd interface for GnuTLS.
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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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#include "config.h"
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#include "rsyslog.h"
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <signal.h>
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#include <ctype.h>
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#include <netdb.h>
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#include <fnmatch.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "rsyslog.h"
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#include "syslogd-types.h"
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#include "module-template.h"
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#include "parse.h"
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#include "srUtils.h"
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#include "obj.h"
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#include "errmsg.h"
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#include "nsd_ptcp.h"
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#include "nsd_gtls.h"
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MODULE_TYPE_LIB
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/* static data */
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DEFobjStaticHelpers
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DEFobjCurrIf(errmsg)
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DEFobjCurrIf(glbl)
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DEFobjCurrIf(nsd_ptcp)
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/* Standard-Constructor */
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BEGINobjConstruct(nsd_gtls) /* be sure to specify the object type also in END macro! */
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iRet = nsd_ptcp.Construct(&pThis->pTcp);
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ENDobjConstruct(nsd_gtls)
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/* destructor for the nsd_gtls object */
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BEGINobjDestruct(nsd_gtls) /* be sure to specify the object type also in END and CODESTART macros! */
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CODESTARTobjDestruct(nsd_gtls)
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if(pThis->pTcp != NULL)
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nsd_ptcp.Destruct(&pThis->pTcp);
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ENDobjDestruct(nsd_gtls)
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/* abort a connection. This is meant to be called immediately
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* before the Destruct call. -- rgerhards, 2008-03-24
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*/
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static rsRetVal
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Abort(nsd_t *pNsd)
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{
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nsd_gtls_t *pThis = (nsd_gtls_t*) pNsd;
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DEFiRet;
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ISOBJ_TYPE_assert((pThis), nsd_gtls);
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if(pThis->iMode == 0) {
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nsd_ptcp.Abort(pThis->pTcp);
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}
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RETiRet;
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}
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/* initialize the tcp socket for a listner
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* pLstnPort must point to a port name or number. NULL is NOT permitted
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* (hint: we need to be careful when we use this module together with librelp,
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* there NULL indicates the default port
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* default is used.
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* gerhards, 2008-03-17
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*/
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static rsRetVal
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LstnInit(nsd_t *pNsd, uchar *pLstnPort)
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{
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nsd_gtls_t *pThis = (nsd_gtls_t*) pNsd;
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DEFiRet;
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ISOBJ_TYPE_assert(pThis, nsd_gtls);
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assert(pLstnPort != NULL);
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if(pThis->iMode == 0) {
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CHKiRet(nsd_ptcp.LstnInit(pThis->pTcp, pLstnPort));
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}
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finalize_it:
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RETiRet;
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}
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/* receive data from a tcp socket
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* The lenBuf parameter must contain the max buffer size on entry and contains
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* the number of octets read (or -1 in case of error) on exit. This function
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* never blocks, not even when called on a blocking socket. That is important
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* for client sockets, which are set to block during send, but should not
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* block when trying to read data. If *pLenBuf is -1, an error occured and
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* errno holds the exact error cause.
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* rgerhards, 2008-03-17
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*/
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static rsRetVal
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Rcv(nsd_t *pNsd, uchar *pBuf, ssize_t *pLenBuf)
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{
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DEFiRet;
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nsd_gtls_t *pThis = (nsd_gtls_t*) pNsd;
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ISOBJ_TYPE_assert(pThis, nsd_gtls);
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if(pThis->iMode == 0) {
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CHKiRet(nsd_ptcp.Rcv(pThis->pTcp, pBuf, pLenBuf));
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}
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finalize_it:
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RETiRet;
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}
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/* send a buffer. On entry, pLenBuf contains the number of octets to
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* write. On exit, it contains the number of octets actually written.
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* If this number is lower than on entry, only a partial buffer has
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* been written.
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* rgerhards, 2008-03-19
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*/
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static rsRetVal
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Send(nsd_t *pNsd, uchar *pBuf, ssize_t *pLenBuf)
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{
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nsd_gtls_t *pThis = (nsd_gtls_t*) pNsd;
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DEFiRet;
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ISOBJ_TYPE_assert(pThis, nsd_gtls);
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if(pThis->iMode == 0) {
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CHKiRet(nsd_ptcp.Send(pThis->pTcp, pBuf, pLenBuf));
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}
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finalize_it:
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RETiRet;
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}
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/* open a connection to a remote host (server).
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* rgerhards, 2008-03-19
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*/
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static rsRetVal
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Connect(nsd_t *pNsd, int family, uchar *port, uchar *host)
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{
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nsd_gtls_t *pThis = (nsd_gtls_t*) pNsd;
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DEFiRet;
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ISOBJ_TYPE_assert(pThis, nsd_gtls);
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assert(port != NULL);
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assert(host != NULL);
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if(pThis->iMode == 0) {
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CHKiRet(nsd_ptcp.Connect(pThis->pTcp, family, port, host));
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}
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finalize_it:
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RETiRet;
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}
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/* queryInterface function */
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BEGINobjQueryInterface(nsd_gtls)
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CODESTARTobjQueryInterface(nsd_gtls)
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if(pIf->ifVersion != nsdCURR_IF_VERSION) {/* check for current version, increment on each change */
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ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
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}
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/* ok, we have the right interface, so let's fill it
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* Please note that we may also do some backwards-compatibility
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* work here (if we can support an older interface version - that,
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* of course, also affects the "if" above).
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*/
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pIf->Construct = (rsRetVal(*)(nsd_t**)) nsd_gtlsConstruct;
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pIf->Destruct = (rsRetVal(*)(nsd_t**)) nsd_gtlsDestruct;
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pIf->Abort = Abort;
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pIf->LstnInit = LstnInit;
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//pIf->AcceptConnReq = AcceptConnReq;
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pIf->Rcv = Rcv;
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pIf->Send = Send;
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pIf->Connect = Connect;
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finalize_it:
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ENDobjQueryInterface(nsd_gtls)
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/* exit our class
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*/
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BEGINObjClassExit(nsd_gtls, OBJ_IS_LOADABLE_MODULE) /* CHANGE class also in END MACRO! */
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CODESTARTObjClassExit(nsd_gtls)
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/* release objects we no longer need */
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objRelease(nsd_ptcp, LM_NSD_PTCP_FILENAME);
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objRelease(glbl, CORE_COMPONENT);
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objRelease(errmsg, CORE_COMPONENT);
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ENDObjClassExit(nsd_gtls)
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/* Initialize the nsd_gtls class. Must be called as the very first method
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* before anything else is called inside this class.
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* rgerhards, 2008-02-19
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*/
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BEGINObjClassInit(nsd_gtls, 1, OBJ_IS_LOADABLE_MODULE) /* class, version */
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/* request objects we use */
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CHKiRet(objUse(errmsg, CORE_COMPONENT));
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CHKiRet(objUse(glbl, CORE_COMPONENT));
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CHKiRet(objUse(nsd_ptcp, LM_NSD_PTCP_FILENAME));
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/* set our own handlers */
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ENDObjClassInit(nsd_gtls)
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/* --------------- here now comes the plumbing that makes as a library module --------------- */
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BEGINmodExit
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CODESTARTmodExit
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nsd_gtlsClassExit();
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ENDmodExit
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BEGINqueryEtryPt
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CODESTARTqueryEtryPt
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CODEqueryEtryPt_STD_LIB_QUERIES
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ENDqueryEtryPt
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BEGINmodInit()
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CODESTARTmodInit
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*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
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/* Initialize all classes that are in our module - this includes ourselfs */
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CHKiRet(nsd_gtlsClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
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ENDmodInit
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/* vi:set ai:
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*/
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