added new parser modules

most importantly pmlastmsg, which handles the pathetic "last message
repeated n times" messages that some syslogd's emit.
Also some minor fixes, like wrong files names in make dist (for new
files introduced after last release)

1 files changed, 176 insertions, 0 deletions

diff --git a/plugins/pmlastmsg/pmlastmsg.c b/plugins/pmlastmsg/pmlastmsg.c
new file mode 100644
index 00000000..67a742c9
--- /dev/null
+++ b/plugins/pmlastmsg/pmlastmsg.c
@@ -0,0 +1,176 @@
+/* pmlastmsg.c
+ * This is a parser module specifically for those horrible
+ * "<PRI>last message repeated n times" messages notoriously generated
+ * by some syslog implementations. Note that this parser should be placed
+ * on top of the parser stack -- it takes out only these messages and
+ * leaves all others for processing by the other parsers.
+ *
+ * NOTE: read comments in module-template.h to understand how this file
+ *       works!
+ *
+ * File begun on 2010-07-13 by RGerhards
+ *
+ * Copyright 2010 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 "rsyslog.h"
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <ctype.h>
+#include "syslogd.h"
+#include "conf.h"
+#include "syslogd-types.h"
+#include "template.h"
+#include "msg.h"
+#include "module-template.h"
+#include "glbl.h"
+#include "errmsg.h"
+#include "parser.h"
+#include "datetime.h"
+#include "unicode-helper.h"
+
+MODULE_TYPE_PARSER
+PARSER_NAME("rsyslog.lastline")
+
+/* internal structures
+ */
+DEF_PMOD_STATIC_DATA
+DEFobjCurrIf(errmsg)
+DEFobjCurrIf(glbl)
+DEFobjCurrIf(parser)
+DEFobjCurrIf(datetime)
+
+
+/* static data */
+static int bParseHOSTNAMEandTAG;	/* cache for the equally-named global param - performance enhancement */
+
+
+BEGINisCompatibleWithFeature
+CODESTARTisCompatibleWithFeature
+	if(eFeat == sFEATUREAutomaticSanitazion)
+		iRet = RS_RET_OK;
+	if(eFeat == sFEATUREAutomaticPRIParsing)
+		iRet = RS_RET_OK;
+ENDisCompatibleWithFeature
+
+
+/* parse a legay-formatted syslog message.
+ */
+BEGINparse
+	uchar *p2parse;
+	int lenMsg;
+#define OpeningText "last message repeated "
+#define ClosingText " times"
+CODESTARTparse
+	dbgprintf("Message will now be parsed by \"last message repated n times\" parser.\n");
+	assert(pMsg != NULL);
+	assert(pMsg->pszRawMsg != NULL);
+	lenMsg = pMsg->iLenRawMsg - pMsg->offAfterPRI; /* note: offAfterPRI is already the number of PRI chars (do not add one!) */
+	p2parse = pMsg->pszRawMsg + pMsg->offAfterPRI; /* point to start of text, after PRI */
+
+	/* check if this message is of the type we handle in this (very limited) parser */
+	/* first, we permit SP */
+	while(lenMsg && *p2parse == ' ') {
+		--lenMsg;
+		++p2parse;
+	}
+dbgprintf("pmlastmsg: msg to look at: [%d]'%s'\n", lenMsg, p2parse);
+	if((unsigned) lenMsg < sizeof(OpeningText)-1 + sizeof(ClosingText)-1 + 1) {
+		/* too short, can not be "our" message */
+dbgprintf("msg too short!\n");
+		ABORT_FINALIZE(RS_RET_COULD_NOT_PARSE);
+	}
+
+	if(strncasecmp((char*) p2parse, OpeningText, sizeof(OpeningText)-1) != 0) {
+		/* wrong opening text */
+dbgprintf("wrong opening text!\n");
+		ABORT_FINALIZE(RS_RET_COULD_NOT_PARSE);
+	}
+	lenMsg -= sizeof(OpeningText) - 1;
+	p2parse += sizeof(OpeningText) - 1;
+
+	/* now we need an integer --> digits */
+	while(lenMsg && isdigit(*p2parse)) {
+		--lenMsg;
+		++p2parse;
+	}
+
+	if(lenMsg != sizeof(ClosingText)-1) {
+		/* size must fit, else it is not "our" message... */
+		ABORT_FINALIZE(RS_RET_COULD_NOT_PARSE);
+	}
+
+	if(strncasecmp((char*) p2parse, ClosingText, lenMsg) != 0) {
+		/* wrong closing text */
+dbgprintf("strcasecmp: %d\n", strncasecmp((char*) p2parse, ClosingText, lenMsg));
+dbgprintf("pmlastmsg: closing msg to look at: [%d]'%s', (%s)\n", lenMsg, p2parse, ClosingText);
+dbgprintf("wrong closing text!\n");
+		ABORT_FINALIZE(RS_RET_COULD_NOT_PARSE);
+	}
+
+	/* OK, now we know we need to process this message, so we do that
+	 * (and it is fairly simple in our case...)
+	 */
+	DBGPRINTF("pmlastmsg detected a \"last message repeated n times\" message\n");
+
+	setProtocolVersion(pMsg, 0);
+	memcpy(&pMsg->tTIMESTAMP, &pMsg->tRcvdAt, sizeof(struct syslogTime));
+	MsgSetMSGoffs(pMsg, pMsg->offAfterPRI); /* we don't have a header! */
+	MsgSetTAG(pMsg, (uchar*)"", 0);
+
+finalize_it:
+ENDparse
+
+
+BEGINmodExit
+CODESTARTmodExit
+	/* release what we no longer need */
+	objRelease(errmsg, CORE_COMPONENT);
+	objRelease(glbl, CORE_COMPONENT);
+	objRelease(parser, CORE_COMPONENT);
+	objRelease(datetime, CORE_COMPONENT);
+ENDmodExit
+
+
+BEGINqueryEtryPt
+CODESTARTqueryEtryPt
+CODEqueryEtryPt_STD_PMOD_QUERIES
+CODEqueryEtryPt_IsCompatibleWithFeature_IF_OMOD_QUERIES
+ENDqueryEtryPt
+
+
+BEGINmodInit()
+CODESTARTmodInit
+	*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
+CODEmodInit_QueryRegCFSLineHdlr
+	CHKiRet(objUse(glbl, CORE_COMPONENT));
+	CHKiRet(objUse(errmsg, CORE_COMPONENT));
+	CHKiRet(objUse(parser, CORE_COMPONENT));
+	CHKiRet(objUse(datetime, CORE_COMPONENT));
+
+	dbgprintf("lastmsg parser init called, compiled with version %s\n", VERSION);
+ 	bParseHOSTNAMEandTAG = glbl.GetParseHOSTNAMEandTAG(); /* cache value, is set only during rsyslogd option processing */
+
+
+ENDmodInit
+
+/* vim:set ai:
+ */