1 files changed, 293 insertions, 0 deletions
diff --git a/plugins/ommysql/ommysql.c b/plugins/ommysql/ommysql.c
new file mode 100644
index 00000000..0f7a9b9c
--- /dev/null
+++ b/plugins/ommysql/ommysql.c
@@ -0,0 +1,293 @@
+/* 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:
+ */