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-rw-r--r--plugins/ommysql/ommysql.c293
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diff --git a/plugins/ommysql/ommysql.c b/plugins/ommysql/ommysql.c
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+/* ommysql.c
+ * This is the implementation of the build-in output module for MySQL.
+ *
+ * NOTE: read comments in module-template.h to understand how this file
+ * works!
+ *
+ * File begun on 2007-07-20 by RGerhards (extracted from syslogd.c)
+ *
+ * Copyright 2007 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+#include "ommysql-config.h"
+#include "rsyslog.h"
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <signal.h>
+#include <errno.h>
+#include <time.h>
+#include <mysql/mysql.h>
+#include <mysql/errmsg.h>
+#include "syslogd.h"
+#include "syslogd-types.h"
+#include "srUtils.h"
+#include "template.h"
+#include "ommysql.h"
+#include "module-template.h"
+
+/* internal structures
+ */
+DEF_OMOD_STATIC_DATA
+
+typedef struct _instanceData {
+ MYSQL *f_hmysql; /* handle to MySQL */
+ char f_dbsrv[MAXHOSTNAMELEN+1]; /* IP or hostname of DB server*/
+ char f_dbname[_DB_MAXDBLEN+1]; /* DB name */
+ char f_dbuid[_DB_MAXUNAMELEN+1]; /* DB user */
+ char f_dbpwd[_DB_MAXPWDLEN+1]; /* DB user's password */
+ unsigned uLastMySQLErrno; /* last errno returned by MySQL or 0 if all is well */
+} instanceData;
+
+
+BEGINcreateInstance
+CODESTARTcreateInstance
+ENDcreateInstance
+
+
+BEGINisCompatibleWithFeature
+CODESTARTisCompatibleWithFeature
+ if(eFeat == sFEATURERepeatedMsgReduction)
+ iRet = RS_RET_OK;
+ENDisCompatibleWithFeature
+
+
+/* The following function is responsible for closing a
+ * MySQL connection.
+ * Initially added 2004-10-28
+ */
+static void closeMySQL(instanceData *pData)
+{
+ assert(pData != NULL);
+
+ if(pData->f_hmysql != NULL) { /* just to be on the safe side... */
+ mysql_server_end();
+ mysql_close(pData->f_hmysql);
+ pData->f_hmysql = NULL;
+ }
+}
+
+BEGINfreeInstance
+CODESTARTfreeInstance
+ closeMySQL(pData);
+ENDfreeInstance
+
+
+BEGINneedUDPSocket
+CODESTARTneedUDPSocket
+ENDneedUDPSocket
+
+
+BEGINdbgPrintInstInfo
+CODESTARTdbgPrintInstInfo
+ /* nothing special here */
+ENDdbgPrintInstInfo
+
+
+BEGINonSelectReadyWrite
+CODESTARTonSelectReadyWrite
+ENDonSelectReadyWrite
+
+
+BEGINgetWriteFDForSelect
+CODESTARTgetWriteFDForSelect
+ENDgetWriteFDForSelect
+
+
+/* log a database error with descriptive message.
+ * We check if we have a valid MySQL handle. If not, we simply
+ * report an error, but can not be specific. RGerhards, 2007-01-30
+ */
+static void reportDBError(instanceData *pData, int bSilent)
+{
+ char errMsg[512];
+ unsigned uMySQLErrno;
+
+ assert(pData != NULL);
+
+ /* output log message */
+ errno = 0;
+ if(pData->f_hmysql == NULL) {
+ logerror("unknown DB error occured - could not obtain MySQL handle");
+ } else { /* we can ask mysql for the error description... */
+ uMySQLErrno = mysql_errno(pData->f_hmysql);
+ snprintf(errMsg, sizeof(errMsg)/sizeof(char), "db error (%d): %s\n", uMySQLErrno,
+ mysql_error(pData->f_hmysql));
+ if(bSilent || uMySQLErrno == pData->uLastMySQLErrno)
+ dbgprintf("mysql, DBError(silent): %s\n", errMsg);
+ else {
+ pData->uLastMySQLErrno = uMySQLErrno;
+ logerror(errMsg);
+ }
+ }
+
+ return;
+}
+
+
+/* The following function is responsible for initializing a
+ * MySQL connection.
+ * Initially added 2004-10-28 mmeckelein
+ */
+static rsRetVal initMySQL(instanceData *pData, int bSilent)
+{
+ DEFiRet;
+
+ assert(pData != NULL);
+ assert(pData->f_hmysql == NULL);
+
+ pData->f_hmysql = mysql_init(NULL);
+ if(pData->f_hmysql == NULL) {
+ logerror("can not initialize MySQL handle");
+ iRet = RS_RET_SUSPENDED;
+ } else { /* we could get the handle, now on with work... */
+ /* Connect to database */
+ if(mysql_real_connect(pData->f_hmysql, pData->f_dbsrv, pData->f_dbuid,
+ pData->f_dbpwd, pData->f_dbname, 0, NULL, 0) == NULL) {
+ reportDBError(pData, bSilent);
+ closeMySQL(pData); /* ignore any error we may get */
+ iRet = RS_RET_SUSPENDED;
+ }
+ }
+
+ return iRet;
+}
+
+
+/* The following function writes the current log entry
+ * to an established MySQL session.
+ * Initially added 2004-10-28 mmeckelein
+ */
+rsRetVal writeMySQL(uchar *psz, instanceData *pData)
+{
+ DEFiRet;
+
+ assert(psz != NULL);
+ assert(pData != NULL);
+
+ /* try insert */
+ if(mysql_query(pData->f_hmysql, (char*)psz)) {
+ /* error occured, try to re-init connection and retry */
+ closeMySQL(pData); /* close the current handle */
+ CHKiRet(initMySQL(pData, 0)); /* try to re-open */
+ if(mysql_query(pData->f_hmysql, (char*)psz)) { /* re-try insert */
+ /* we failed, giving up for now */
+ reportDBError(pData, 0);
+ closeMySQL(pData); /* free ressources */
+ ABORT_FINALIZE(RS_RET_SUSPENDED);
+ }
+ }
+
+finalize_it:
+ if(iRet == RS_RET_OK) {
+ pData->uLastMySQLErrno = 0; /* reset error for error supression */
+ }
+
+ return iRet;
+}
+
+
+BEGINtryResume
+CODESTARTtryResume
+ if(pData->f_hmysql == NULL) {
+ iRet = initMySQL(pData, 1);
+ }
+ENDtryResume
+
+BEGINdoAction
+CODESTARTdoAction
+ dbgprintf("\n");
+ iRet = writeMySQL(ppString[0], pData);
+ENDdoAction
+
+
+BEGINparseSelectorAct
+ int iMySQLPropErr = 0;
+CODESTARTparseSelectorAct
+CODE_STD_STRING_REQUESTparseSelectorAct(1)
+ /* first check if this config line is actually for us */
+ if(*p != '>') {
+ ABORT_FINALIZE(RS_RET_CONFLINE_UNPROCESSED);
+ }
+
+ /* ok, if we reach this point, we have something for us */
+ if((iRet = createInstance(&pData)) != RS_RET_OK)
+ goto finalize_it;
+
+ p++; /* eat '>' '*/
+
+ /* rger 2004-10-28: added support for MySQL
+ * >server,dbname,userid,password
+ * Now we read the MySQL connection properties
+ * and verify that the properties are valid.
+ */
+ if(getSubString(&p, pData->f_dbsrv, MAXHOSTNAMELEN+1, ','))
+ iMySQLPropErr++;
+ if(*pData->f_dbsrv == '\0')
+ iMySQLPropErr++;
+ if(getSubString(&p, pData->f_dbname, _DB_MAXDBLEN+1, ','))
+ iMySQLPropErr++;
+ if(*pData->f_dbname == '\0')
+ iMySQLPropErr++;
+ if(getSubString(&p, pData->f_dbuid, _DB_MAXUNAMELEN+1, ','))
+ iMySQLPropErr++;
+ if(*pData->f_dbuid == '\0')
+ iMySQLPropErr++;
+ if(getSubString(&p, pData->f_dbpwd, _DB_MAXPWDLEN+1, ';'))
+ iMySQLPropErr++;
+ /* now check for template
+ * We specify that the SQL option must be present in the template.
+ * This is for your own protection (prevent sql injection).
+ */
+ if(*(p-1) == ';')
+ --p; /* TODO: the whole parsing of the MySQL module needs to be re-thought - but this here
+ * is clean enough for the time being -- rgerhards, 2007-07-30
+ */
+ CHKiRet(cflineParseTemplateName(&p, *ppOMSR, 0, OMSR_RQD_TPL_OPT_SQL, (uchar*) " StdDBFmt"));
+
+ /* If we detect invalid properties, we disable logging,
+ * because right properties are vital at this place.
+ * Retries make no sense.
+ */
+ if (iMySQLPropErr) {
+ logerror("Trouble with MySQL connection properties. -MySQL logging disabled");
+ ABORT_FINALIZE(RS_RET_INVALID_PARAMS);
+ } else {
+ CHKiRet(initMySQL(pData, 0));
+ }
+
+CODE_STD_FINALIZERparseSelectorAct
+ENDparseSelectorAct
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_OMOD_QUERIES
+ENDqueryEtryPt
+
+
+BEGINmodInit()
+CODESTARTmodInit
+ *ipIFVersProvided = 1; /* so far, we only support the initial definition */
+CODEmodInit_QueryRegCFSLineHdlr
+ENDmodInit
+/*
+ * vi:set ai:
+ */