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/* imrelp.c
*
* This is the implementation of the RELP input module.
*
* File begun on 2008-03-13 by RGerhards
*
* Copyright 2008, 2009 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>
#include <librelp.h>
#include "rsyslog.h"
#include "dirty.h"
#include "cfsysline.h"
#include "module-template.h"
#include "net.h"
#include "msg.h"
#include "unicode-helper.h"
#include "prop.h"
MODULE_TYPE_INPUT
MODULE_TYPE_NOKEEP
/* static data */
DEF_IMOD_STATIC_DATA
DEFobjCurrIf(net)
DEFobjCurrIf(prop)
/* Module static data */
static relpEngine_t *pRelpEngine; /* our relp engine */
static prop_t *pInputName = NULL; /* there is only one global inputName for all messages generated by this module */
/* config settings */
static int iTCPSessMax = 200; /* max number of sessions */
/* ------------------------------ callbacks ------------------------------ */
#if 0
/* this shall go into a specific ACL module! */
static int
isPermittedHost(struct sockaddr *addr, char *fromHostFQDN, void __attribute__((unused)) *pUsrSrv,
void __attribute__((unused)) *pUsrSess)
{
return net.isAllowedSender(net.pAllowedSenders_TCP, addr, fromHostFQDN);
}
#endif // #if 0
/* callback for receiving syslog messages. This function is invoked from the
* RELP engine when a syslog message arrived. It must return a relpRetVal,
* with anything else but RELP_RET_OK terminating the relp session. Please note
* that RELP_RET_OK is equal to RS_RET_OK and the other libRELP error codes
* are different from our rsRetVal. So we can simply use our own iRet system
* to fulfill the requirement.
* rgerhards, 2008-03-21
* Note: librelp 1.0.0 is required in order to receive the IP address, otherwise
* we will only see the hostname (twice). -- rgerhards, 2009-10-14
*/
static relpRetVal
onSyslogRcv(uchar *pHostname, uchar *pIP, uchar *pMsg, size_t lenMsg)
{
DEFiRet;
parseAndSubmitMessage(pHostname, pIP, pMsg, lenMsg, PARSE_HOSTNAME,
eFLOWCTL_LIGHT_DELAY, pInputName, NULL, 0);
RETiRet;
}
/* ------------------------------ end callbacks ------------------------------ */
static rsRetVal addListener(void __attribute__((unused)) *pVal, uchar *pNewVal)
{
DEFiRet;
if(pRelpEngine == NULL) {
CHKiRet(relpEngineConstruct(&pRelpEngine));
CHKiRet(relpEngineSetDbgprint(pRelpEngine, dbgprintf));
CHKiRet(relpEngineSetEnableCmd(pRelpEngine, (uchar*) "syslog", eRelpCmdState_Required));
CHKiRet(relpEngineSetSyslogRcv(pRelpEngine, onSyslogRcv));
}
CHKiRet(relpEngineAddListner(pRelpEngine, pNewVal));
free(pNewVal); /* we do no longer need it */
finalize_it:
RETiRet;
}
/* This function is called to gather input.
*/
BEGINrunInput
CODESTARTrunInput
/* TODO: we must be careful to start the listener here. Currently, tcpsrv.c seems to
* do that in ConstructFinalize
*/
iRet = relpEngineRun(pRelpEngine);
ENDrunInput
/* initialize and return if will run or not */
BEGINwillRun
CODESTARTwillRun
/* first apply some config settings */
//net.PrintAllowedSenders(2); /* TCP */
if(pRelpEngine == NULL)
ABORT_FINALIZE(RS_RET_NO_RUN);
/* we need to create the inputName property (only once during our lifetime) */
CHKiRet(prop.Construct(&pInputName));
CHKiRet(prop.SetString(pInputName, UCHAR_CONSTANT("imrelp"), sizeof("imrelp") - 1));
CHKiRet(prop.ConstructFinalize(pInputName));
finalize_it:
ENDwillRun
BEGINafterRun
CODESTARTafterRun
/* do cleanup here */
#if 0
if(net.pAllowedSenders_TCP != NULL) {
net.clearAllowedSenders(net.pAllowedSenders_TCP);
net.pAllowedSenders_TCP = NULL;
}
#endif
if(pInputName != NULL)
prop.Destruct(&pInputName);
ENDafterRun
BEGINmodExit
CODESTARTmodExit
if(pRelpEngine != NULL)
iRet = relpEngineDestruct(&pRelpEngine);
/* release objects we used */
objRelease(prop, CORE_COMPONENT);
objRelease(net, LM_NET_FILENAME);
ENDmodExit
static rsRetVal
resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
{
iTCPSessMax = 200;
return RS_RET_OK;
}
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_IMOD_QUERIES
ENDqueryEtryPt
BEGINmodInit()
CODESTARTmodInit
*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
CODEmodInit_QueryRegCFSLineHdlr
pRelpEngine = NULL;
/* request objects we use */
CHKiRet(objUse(prop, CORE_COMPONENT));
CHKiRet(objUse(net, LM_NET_FILENAME));
/* register config file handlers */
CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputrelpserverrun", 0, eCmdHdlrGetWord,
addListener, NULL, STD_LOADABLE_MODULE_ID));
CHKiRet(omsdRegCFSLineHdlr((uchar *)"inputrelpmaxsessions", 0, eCmdHdlrInt,
NULL, &iTCPSessMax, STD_LOADABLE_MODULE_ID));
CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler,
resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID));
ENDmodInit
/* vim:set ai:
*/
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