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/** omoracle.c
This is an output module feeding directly to an Oracle
database. It uses Oracle Call Interface, a propietary module
provided by Oracle.
Config lines to be used are of this form:
:omoracle:dbstring,user,password;StatementTemplate
All fields are mandatory. The dbstring can be an Oracle easystring
or a DB name, as present in the tnsnames.ora file.
Author: Luis Fernando Muñoz Mejías
<Luis.Fernando.Munoz.Mejias@cern.ch>
This file is part of rsyslog.
*/
#include "config.h"
#include "rsyslog.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <oci.h>
#include <errno.h>
#include <stdarg.h>
#include <signal.h>
#include <time.h>
#include <assert.h>
#include "dirty.h"
#include "syslogd-types.h"
#include "srUtils.h"
#include "template.h"
#include "module-template.h"
#include "errmsg.h"
#include "cfsysline.h"
#include "omoracle.h"
MODULE_TYPE_OUTPUT
/** */
DEF_OMOD_STATIC_DATA
DEFobjCurrIf(errmsg)
typedef struct _instanceData {
/* Environment handler, the base for any OCI work. */
OCIEnv* environment;
/* Session handler, the actual DB connection object. */
OCISession* session;
/* Error handler for OCI calls. */
OCIError* error;
/* Prepared statement. */
OCIStmt* statement;
/* Service handler. */
OCISvcCtx* service;
/* Credentials object for the connection. */
OCIAuthInfo* authinfo;
/* Binding parameters, currently unused */
OCIBind* binding;
/* Connection string, kept here for possible retries. */
char* connection;
} instanceData;
/** Generic function for handling errors from OCI.
It will be called only inside CHECKERR and CHECKENV macros.
Arguments: handle The error or environment handle to check.
htype: OCI_HTYPE_* constant, usually OCI_HTYPE_ERROR or
OCI_HTYPE_ENV
status: status code to check, usually the return value of an OCI
function.
Returns OCI_SUCCESS on success, OCI_ERROR otherwise.
*/
static int oci_errors(void* handle, ub4 htype, sword status)
{
sb4 errcode;
unsigned char buf[MAX_BUFSIZE];
switch (status) {
case OCI_SUCCESS:
return OCI_SUCCESS;
break;
case OCI_SUCCESS_WITH_INFO:
errmsg.LogError(0, NO_ERRCODE, "OCI SUCCESS - With info\n");
break;
case OCI_NEED_DATA:
errmsg.LogError(0, NO_ERRCODE, "OCI NEEDS MORE DATA\n");
break;
case OCI_ERROR:
dbgprintf ("OCI GENERAL ERROR\n");
if (handle) {
OCIErrorGet(handle, 1, NULL, &errcode, buf,
sizeof buf, htype);
errmsg.LogError(0, NO_ERRCODE, "Error message: %s", buf);
} else
errmsg.LogError(0, NO_ERRCODE, "NULL handle\n"
"Unable to extract further "
"information");
break;
case OCI_INVALID_HANDLE:
errmsg.LogError(0, NO_ERRCODE, "OCI INVALID HANDLE\n");
break;
case OCI_STILL_EXECUTING:
errmsg.LogError(0, NO_ERRCODE, "Still executing...\n");
break;
case OCI_CONTINUE:
errmsg.LogError(0, NO_ERRCODE, "OCI CONTINUE\n");
break;
}
return OCI_ERROR;
}
/* Resource allocation */
BEGINcreateInstance
CODESTARTcreateInstance
ASSERT(pData != NULL);
CHECKENV(pData->environment,
OCIEnvCreate((void*) &(pData->environment), OCI_DEFAULT,
NULL, NULL, NULL, NULL, 0, NULL));
CHECKENV(pData->environment,
OCIHandleAlloc(pData->environment, (void*) &(pData->error),
OCI_HTYPE_ERROR, 0, NULL));
CHECKENV(pData->environment,
OCIHandleAlloc(pData->environment, (void*) &(pData->authinfo),
OCI_HTYPE_AUTHINFO, 0, NULL));
CHECKENV(pData->environment,
OCIHandleAlloc(pData->environment, (void*) &(pData->statement),
OCI_HTYPE_STMT, 0, NULL));
finalize_it:
ENDcreateInstance
/** Close the session and free anything allocated by
createInstance. */
BEGINfreeInstance
CODESTARTfreeInstance
OCISessionRelease(pData->service, pData->error, NULL, 0, OCI_DEFAULT);
OCIHandleFree(pData->environment, OCI_HTYPE_ENV);
OCIHandleFree(pData->error, OCI_HTYPE_ERROR);
OCIHandleFree(pData->service, OCI_HTYPE_SVCCTX);
OCIHandleFree(pData->authinfo, OCI_HTYPE_AUTHINFO);
OCIHandleFree(pData->statement, OCI_HTYPE_STMT);
free(pData->connection);
dbgprintf ("omoracle freed all its resources\n");
RETiRet;
ENDfreeInstance
BEGINtryResume
CODESTARTtryResume
dbgprintf("Attempting to restart the last action\n");
OCISessionRelease(pData->service, pData->error, NULL, 0, OCI_DEFAULT);
OCIHandleFree(pData->service, OCI_HTYPE_SVCCTX);
CHECKERR(pData->error, OCISessionGet(pData->environment, pData->error,
&pData->service, pData->authinfo,
pData->connection,
strlen(pData->connection), NULL, 0,
NULL, NULL, NULL, OCI_DEFAULT));
CHECKERR(pData->error, OCIStmtExecute(pData->service, pData->statement,
pData->error, 1, 0, NULL, NULL,
OCI_DEFAULT));
finalize_it:
ENDtryResume
static rsRetVal startSession(instanceData* pData, char* connection, char* user,
char * password)
{
DEFiRet;
CHECKERR(pData->error,
OCIAttrSet(pData->authinfo, OCI_HTYPE_AUTHINFO, user,
strlen(user), OCI_ATTR_USERNAME, pData->error));
CHECKERR(pData->error,
OCIAttrSet(pData->authinfo, OCI_HTYPE_AUTHINFO, password,
strlen(password), OCI_ATTR_PASSWORD, pData->error));
CHECKERR(pData->error,
OCISessionGet(pData->environment, pData->error,
&pData->service, pData->authinfo, connection,
strlen(connection), NULL, 0, NULL, NULL, NULL,
OCI_DEFAULT));
finalize_it:
if (iRet != RS_RET_OK)
errmsg.LogError(0, NO_ERRCODE, "Unable to start Oracle session\n");
RETiRet;
}
BEGINisCompatibleWithFeature
CODESTARTisCompatibleWithFeature
/* Right now, this module is compatible with nothing. */
dbgprintf ("***** OMORACLE ***** At isCompatibleWithFeature\n");
iRet = RS_RET_INCOMPATIBLE;
ENDisCompatibleWithFeature
BEGINparseSelectorAct
char user[_DB_MAXUNAMELEN];
char pwd[_DB_MAXPWDLEN];
char connection_string[MAXHOSTNAMELEN];
CODESTARTparseSelectorAct
CODE_STD_STRING_REQUESTparseSelectorAct(1);
if (strncmp((char*) p, ":omoracle:", sizeof ":omoracle:" - 1)) {
ABORT_FINALIZE(RS_RET_CONFLINE_UNPROCESSED);
}
p += sizeof ":omoracle:" - 1;
if (*p == '\0' || *p == ',') {
errmsg.LogError(0, NO_ERRCODE, "Wrong char processing module arguments: %c\n", *p);
ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
}
CHKiRet(getSubString(&p, connection_string, MAXHOSTNAMELEN, ','));
CHKiRet(getSubString(&p, user, _DB_MAXUNAMELEN, ','));
CHKiRet(getSubString(&p, pwd, _DB_MAXPWDLEN, ';'));
p--;
CHKiRet(cflineParseTemplateName(&p, *ppOMSR, 0,
OMSR_RQD_TPL_OPT_SQL, " StdFmt"));
CHKiRet(createInstance(&pData));
pData->connection = strdup(connection_string);
if (pData->connection == NULL) {
iRet = RS_RET_OUT_OF_MEMORY;
goto finalize_it;
}
CHKiRet(startSession(pData, connection_string, user, pwd));
dbgprintf ("omoracle module got all its resources allocated "
"and connected to the DB\n");
memset(user, 0, sizeof user);
memset(pwd, 0, sizeof pwd);
CODE_STD_FINALIZERparseSelectorAct
ENDparseSelectorAct
BEGINdoAction
CODESTARTdoAction
dbgprintf("omoracle attempting to execute statement %s\n", *ppString);
CHECKERR(pData->error,
OCIStmtPrepare(pData->statement, pData->error, *ppString,
strlen(*ppString), OCI_NTV_SYNTAX,
OCI_DEFAULT));
CHECKERR(pData->error,
OCIStmtExecute(pData->service, pData->statement, pData->error,
1, 0, NULL, NULL, OCI_DEFAULT));
CHECKERR(pData->error,
OCITransCommit(pData->service, pData->error, 0));
finalize_it:
dbgprintf ("omoracle %s at executing statement %s\n",
iRet?"did not succeed":"succeeded", *ppString);
/* Clean credentials to avoid leakage in case of core dump. */
ENDdoAction
BEGINmodExit
CODESTARTmodExit
ENDmodExit
BEGINdbgPrintInstInfo
CODESTARTdbgPrintInstInfo
ENDdbgPrintInstInfo
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_OMOD_QUERIES
ENDqueryEtryPt
static rsRetVal
resetConfigVariables(uchar __attribute__((unused)) *pp,
void __attribute__((unused)) *pVal)
{
DEFiRet;
RETiRet;
}
BEGINmodInit()
CODESTARTmodInit
*ipIFVersProvided = CURR_MOD_IF_VERSION;
CODEmodInit_QueryRegCFSLineHdlr
CHKiRet(objUse(errmsg, CORE_COMPONENT));
/* CHKiRet(omsdRegCFSLineHdlr((uchar*)"actionomoracle", */
CHKiRet(omsdRegCFSLineHdlr((uchar*) "resetconfigvariables", 1,
eCmdHdlrCustomHandler, resetConfigVariables,
NULL, STD_LOADABLE_MODULE_ID));
ENDmodInit
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