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authorBill Nottingham <notting@redhat.com>2006-06-19 19:40:20 +0000
committerBill Nottingham <notting@redhat.com>2006-06-19 19:40:20 +0000
commit618d5e9f3dd857bb5eff6ae70d93f6c82f9f1e2d (patch)
treeb2f365e2384ccb464bc8e12d1d4929f7b3dd40b5 /src/initlog.h
parent52349e3c25dd905a9c4d65eb46b210014140a30a (diff)
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/**
 * \brief This is the main file of the rsyslogd daemon.
 *
 * Please visit the rsyslog project at
 *
 * http://www.rsyslog.com
 *
 * to learn more about it and discuss any questions you may have.
 *
 * rsyslog had initially been forked from the sysklogd project.
 * I would like to express my thanks to the developers of the sysklogd
 * package - without it, I would have had a much harder start...
 *
 * Please note that while rsyslog started from the sysklogd code base,
 * it nowadays has almost nothing left in common with it. Allmost all
 * parts of the code have been rewritten.
 *
 * This Project was intiated and is maintained by
 * Rainer Gerhards <rgerhards@hq.adiscon.com>. See
 * AUTHORS to learn who helped make it become a reality.
 *
 * If you have questions about rsyslogd in general, please email
 * info@adiscon.com. To learn more about rsyslogd, please visit
 * http://www.rsyslog.com.
 *
 * \author Rainer Gerhards <rgerhards@adiscon.com>
 * \date 2003-10-17
 *       Some initial modifications on the sysklogd package to support
 *       liblogging. These have actually not yet been merged to the
 *       source you see currently (but they hopefully will)
 *
 * \date 2004-10-28
 *       Restarted the modifications of sysklogd. This time, we
 *       focus on a simpler approach first. The initial goal is to
 *       provide MySQL database support (so that syslogd can log
 *       to the database).
 *
 * rsyslog - An Enhanced syslogd Replacement.
 * Copyright 2003-2008 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"

/* change the following setting to e.g. 32768 if you would like to
 * support large message sizes for IHE (32k is the current maximum
 * needed for IHE). I was initially tempted to increase it to 32k,
 * but there is a large memory footprint with the current
 * implementation in rsyslog. This will change as the processing
 * changes, but I have re-set it to 1k, because the vast majority
 * of messages is below that and the memory savings is huge, at
 * least compared to the overall memory footprint.
 *
 * If you intend to receive Windows Event Log data (e.g. via
 * EventReporter - www.eventreporter.com), you might want to 
 * increase this number to an even higher value, as event
 * log messages can be very lengthy.
 * rgerhards, 2005-07-05
 *
 * during my recent testing, it showed that 4k seems to be
 * the typical maximum for UDP based syslog. This is a IP stack
 * restriction. Not always ... but very often. If you go beyond
 * that value, be sure to test that rsyslogd actually does what
 * you think it should do ;) Also, it is a good idea to check the
 * doc set for anything on IHE - it most probably has information on
 * message sizes.
 * rgerhards, 2005-08-05
 * 
 * I have increased the default message size to 2048 to be in sync
 * with recent IETF syslog standardization efforts.
 * rgerhards, 2006-11-30
 */
#define DEFUPRI		(LOG_USER|LOG_NOTICE)
#define TIMERINTVL	30		/* interval for checking flush, mark */

#ifdef MTRACE
#include <mcheck.h>
#endif
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <ctype.h>
#include <limits.h>
#define GNU_SOURCE
#include <string.h>
#include <stdarg.h>
#include <time.h>
#include <assert.h>
#include <libgen.h>

#ifdef	__sun
#	include <errno.h>
#else
#	include <sys/errno.h>
#endif
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <sys/file.h>

#if HAVE_SYS_TIMESPEC_H
# include <sys/timespec.h>
#endif

#if HAVE_SYS_STAT_H
#	include <sys/stat.h>
#endif

#include <signal.h>

#if HAVE_PATHS_H
#include <paths.h>
#endif

#ifdef USE_NETZIP
#include <zlib.h>
#endif

#include "pidfile.h"
#include "srUtils.h"
#include "stringbuf.h"
#include "syslogd-types.h"
#include "template.h"
#include "outchannel.h"
#include "syslogd.h"

#include "msg.h"
#include "modules.h"
#include "action.h"
#include "tcpsyslog.h"
#include "iminternal.h"
#include "cfsysline.h"
#include "omshell.h"
#include "omusrmsg.h"
#include "omfwd.h"
#include "omfile.h"
#include "omdiscard.h"
#include "threads.h"
#include "queue.h"
#include "stream.h"
#include "wti.h"
#include "wtp.h"
#include "expr.h"
#include "ctok.h"
#include "conf.h"
#include "vmop.h"
#include "vmstk.h"
#include "vm.h"
#include "vmprg.h"
#include "errmsg.h"
#include "datetime.h"
#include "sysvar.h"

/* definitions for objects we access */
DEFobjCurrIf(obj)
DEFobjCurrIf(datetime)
DEFobjCurrIf(conf)
DEFobjCurrIf(expr)
DEFobjCurrIf(vm)
DEFobjCurrIf(module)
DEFobjCurrIf(errmsg)
DEFobjCurrIf(net) /* TODO: make go away! */


/* forward definitions */
static rsRetVal GlobalClassExit(void);

/* We define our own set of syslog defintions so that we
 * do not need to rely on (possibly different) implementations.
 * 2007-07-19 rgerhards
 */
/* missing definitions for solaris
 * 2006-02-16 Rger
 */
#ifdef __sun
#	define LOG_AUTHPRIV LOG_AUTH
#endif
#define INTERNAL_NOPRI  0x10    /* the "no priority" priority */
#define LOG_FTP         (11<<3) /* ftp daemon */


#ifndef UTMP_FILE
#ifdef UTMP_FILENAME
#define UTMP_FILE UTMP_FILENAME
#else
#ifdef _PATH_UTMP
#define UTMP_FILE _PATH_UTMP
#else
#define UTMP_FILE "/etc/utmp"
#endif
#endif
#endif

#ifndef _PATH_LOGCONF 
#define _PATH_LOGCONF	"/etc/rsyslog.conf"
#endif

#ifndef _PATH_MODDIR
#define _PATH_MODDIR	"/lib/rsyslog/"
#endif

#if defined(SYSLOGD_PIDNAME)
#	undef _PATH_LOGPID
#	if defined(FSSTND)
#		ifdef BSD
#			define _PATH_VARRUN "/var/run/"
#		endif
#		if defined(__sun) || defined(__hpux)
#			define _PATH_VARRUN "/var/run/"
#		endif
#		define _PATH_LOGPID _PATH_VARRUN SYSLOGD_PIDNAME
#	else
#		define _PATH_LOGPID "/etc/" SYSLOGD_PIDNAME
#	endif
#else
#	ifndef _PATH_LOGPID
#		if defined(__sun) || defined(__hpux)
#			define _PATH_VARRUN "/var/run/"
#		endif
#		if defined(FSSTND)
#			define _PATH_LOGPID _PATH_VARRUN "rsyslogd.pid"
#		else
#			define _PATH_LOGPID "/etc/rsyslogd.pid"
#		endif
#	endif
#endif

#ifndef _PATH_DEV
#	define _PATH_DEV	"/dev/"
#endif

#ifndef _PATH_CONSOLE
#define _PATH_CONSOLE	"/dev/console"
#endif

#ifndef _PATH_TTY
#define _PATH_TTY	"/dev/tty"
#endif

static uchar	*ConfFile = (uchar*) _PATH_LOGCONF; /* read-only after startup */
static char	*PidFile = _PATH_LOGPID; /* read-only after startup */
char	ctty[] = _PATH_CONSOLE;	/* this is read-only; used by omfile -- TODO: remove that dependency */

static pid_t myPid;	/* our pid for use in self-generated messages, e.g. on startup */
/* mypid is read-only after the initial fork() */
static int restart = 0; /* do restart (config read) - multithread safe */

int glblHadMemShortage = 0; /* indicates if we had memory shortage some time during the run */


static int bParseHOSTNAMEandTAG = 1; /* global config var: should the hostname and tag be
                                      * parsed inside message - rgerhards, 2006-03-13 */
static int bFinished = 0;	/* used by termination signal handler, read-only except there
				 * is either 0 or the number of the signal that requested the
 				 * termination.
				 */

/* Intervals at which we flush out "message repeated" messages,
 * in seconds after previous message is logged.  After each flush,
 * we move to the next interval until we reach the largest.
 * TODO: this shall go into action object! -- rgerhards, 2008-01-29
 */
int	repeatinterval[2] = { 30, 60 };	/* # of secs before flush */

#define LIST_DELIMITER	':'		/* delimiter between two hosts */

struct	filed *Files = NULL; /* read-only after init() (but beware of sigusr1!) */

static pid_t ppid; /* This is a quick and dirty hack used for spliting main/startup thread */

typedef struct legacyOptsLL_s {
	uchar *line;
	struct legacyOptsLL_s *next;
} legacyOptsLL_t;
legacyOptsLL_t *pLegacyOptsLL = NULL;

/* global variables for config file state */
static int	bDropTrailingLF = 1; /* drop trailing LF's on reception? */
int	iCompatibilityMode = 0;		/* version we should be compatible with; 0 means sysklogd. It is
					   the default, so if no -c<n> option is given, we make ourselvs
					   as compatible to sysklogd as possible. */
static int	bDebugPrintTemplateList = 1;/* output template list in debug mode? */
static int	bDebugPrintCfSysLineHandlerList = 1;/* output cfsyslinehandler list in debug mode? */
static int	bDebugPrintModuleList = 1;/* output module list in debug mode? */
int	bDropMalPTRMsgs = 0;/* Drop messages which have malicious PTR records during DNS lookup */
static uchar	cCCEscapeChar = '\\';/* character to be used to start an escape sequence for control chars */
static int 	bEscapeCCOnRcv = 1; /* escape control characters on reception: 0 - no, 1 - yes */
int 	bReduceRepeatMsgs; /* reduce repeated message - 0 - no, 1 - yes */
int	bActExecWhenPrevSusp; /* execute action only when previous one was suspended? */
static int	logEveryMsg = 0;/* no repeat message processing  - read-only after startup
				 * 0 - suppress duplicate messages
				 * 1 - do NOT suppress duplicate messages
				 */
uchar *pszWorkDir = NULL;/* name of rsyslog's spool directory (without trailing slash) */
/* end global config file state variables */

char	LocalHostName[MAXHOSTNAMELEN+1];/* our hostname  - read-only after startup */
char	*LocalDomain;	/* our local domain name  - read-only after startup */
int	MarkInterval = 20 * 60;	/* interval between marks in seconds - read-only after startup */
int      family = PF_UNSPEC;     /* protocol family (IPv4, IPv6 or both), set via cmdline */
int      send_to_all = 0;        /* send message to all IPv4/IPv6 addresses */
static int	NoFork = 0; 	/* don't fork - don't run in daemon mode - read-only after startup */
int	DisableDNS = 0; /* don't look up IP addresses of remote messages */
char	**StripDomains = NULL;/* these domains may be stripped before writing logs  - r/o after s.u., never touched by init */
char	**LocalHosts = NULL;/* these hosts are logged with their hostname  - read-only after startup, never touched by init */
int	NoHops = 1;	/* Can we bounce syslog messages through an
				   intermediate host.  Read-only after startup */
static int	bHaveMainQueue = 0;/* set to 1 if the main queue - in queueing mode - is available
				 * If the main queue is either not yet ready or not running in 
				 * queueing mode (mode DIRECT!), then this is set to 0.
				 */

extern	int errno;

/* main message queue and its configuration parameters */
static queue_t *pMsgQueue = NULL;				/* the main message queue */
static int iMainMsgQueueSize = 10000;				/* size of the main message queue above */
static int iMainMsgQHighWtrMark = 8000;				/* high water mark for disk-assisted queues */
static int iMainMsgQLowWtrMark = 2000;				/* low water mark for disk-assisted queues */
static int iMainMsgQDiscardMark = 9800;				/* begin to discard messages */
static int iMainMsgQDiscardSeverity = 8;			/* by default, discard nothing to prevent unintentional loss */
static int iMainMsgQueueNumWorkers = 1;				/* number of worker threads for the mm queue above */
static queueType_t MainMsgQueType = QUEUETYPE_FIXED_ARRAY;	/* type of the main message queue above */
static uchar *pszMainMsgQFName = NULL;				/* prefix for the main message queue file */
static int64 iMainMsgQueMaxFileSize = 1024*1024;
static int iMainMsgQPersistUpdCnt = 0;				/* persist queue info every n updates */
static int iMainMsgQtoQShutdown = 0;				/* queue shutdown */ 
static int iMainMsgQtoActShutdown = 1000;			/* action shutdown (in phase 2) */ 
static int iMainMsgQtoEnq = 2000;				/* timeout for queue enque */ 
static int iMainMsgQtoWrkShutdown = 60000;			/* timeout for worker thread shutdown */
static int iMainMsgQWrkMinMsgs = 100;				/* minimum messages per worker needed to start a new one */
static int iMainMsgQDeqSlowdown = 0;				/* dequeue slowdown (simple rate limiting) */
static int bMainMsgQSaveOnShutdown = 1;				/* save queue on shutdown (when DA enabled)? */
static int64 iMainMsgQueMaxDiskSpace = 0;			/* max disk space allocated 0 ==> unlimited */


/* support for simple textual representation of FIOP names
 * rgerhards, 2005-09-27
 */
static char* getFIOPName(unsigned iFIOP)
{
	char *pRet;
	switch(iFIOP) {
		case FIOP_CONTAINS:
			pRet = "contains";
			break;
		case FIOP_ISEQUAL:
			pRet = "isequal";
			break;
		case FIOP_STARTSWITH:
			pRet = "startswith";
			break;
		case FIOP_REGEX:
			pRet = "regex";
			break;
		default:
			pRet = "NOP";
			break;
	}
	return pRet;
}


/* Reset config variables to default values.
 * rgerhards, 2007-07-17
 */
static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal)
{
	cCCEscapeChar = '#';
	bActExecWhenPrevSusp = 0;
	bDebugPrintTemplateList = 1;
	bDebugPrintCfSysLineHandlerList = 1;
	bDebugPrintModuleList = 1;
	bEscapeCCOnRcv = 1; /* default is to escape control characters */
	bReduceRepeatMsgs = (logEveryMsg == 1) ? 0 : 1;
	bDropMalPTRMsgs = 0;
	if(pszWorkDir != NULL) {
		free(pszWorkDir);
		pszWorkDir = NULL;
	}
	if(pszMainMsgQFName != NULL) {
		free(pszMainMsgQFName);
		pszMainMsgQFName = NULL;
	}
	iMainMsgQueueSize = 10000;
	iMainMsgQHighWtrMark = 8000;
	iMainMsgQLowWtrMark = 2000;
	iMainMsgQDiscardMark = 9800;
	iMainMsgQDiscardSeverity = 4;
	iMainMsgQueMaxFileSize = 1024 * 1024;
	iMainMsgQueueNumWorkers = 1;
	iMainMsgQPersistUpdCnt = 0;
	iMainMsgQtoQShutdown = 0;
	iMainMsgQtoActShutdown = 1000;
	iMainMsgQtoEnq = 2000;
	iMainMsgQtoWrkShutdown = 60000;
	iMainMsgQWrkMinMsgs = 100;
	iMainMsgQDeqSlowdown = 0;
	bMainMsgQSaveOnShutdown = 1;
	MainMsgQueType = QUEUETYPE_FIXED_ARRAY;
	iMainMsgQueMaxDiskSpace = 0;
	glbliActionResumeRetryCount = 0;

	return RS_RET_OK;
}



int option_DisallowWarning = 1;	/* complain if message from disallowed sender is received */


/* hardcoded standard templates (used for defaults) */
static uchar template_TraditionalFormat[] = "\"%TIMESTAMP% %HOSTNAME% %syslogtag%%msg:::drop-last-lf%\n\"";
static uchar template_WallFmt[] = "\"\r\n\7Message from syslogd@%HOSTNAME% at %timegenerated% ...\r\n %syslogtag%%msg%\n\r\"";
static uchar template_StdFwdFmt[] = "\"<%PRI%>%TIMESTAMP% %HOSTNAME% %syslogtag%%msg%\"";
static uchar template_StdUsrMsgFmt[] = "\" %syslogtag%%msg%\n\r\"";
static uchar template_StdDBFmt[] = "\"insert into SystemEvents (Message, Facility, FromHost, Priority, DeviceReportedTime, ReceivedAt, InfoUnitID, SysLogTag) values ('%msg%', %syslogfacility%, '%HOSTNAME%', %syslogpriority%, '%timereported:::date-mysql%', '%timegenerated:::date-mysql%', %iut%, '%syslogtag%')\",SQL";
static uchar template_StdPgSQLFmt[] = "\"insert into SystemEvents (Message, Facility, FromHost, Priority, DeviceReportedTime, ReceivedAt, InfoUnitID, SysLogTag) values ('%msg%', %syslogfacility%, '%HOSTNAME%', %syslogpriority%, '%timereported:::date-pgsql%', '%timegenerated:::date-pgsql%', %iut%, '%syslogtag%')\",STDSQL";
/* end template */


/* up to the next comment, prototypes that should be removed by reordering */
/* Function prototypes. */
static char **crunch_list(char *list);
static void reapchild();
static void debug_switch();
static void sighup_handler();
static void freeSelectors(void);
static void processImInternal(void);



static int usage(void)
{
	fprintf(stderr, "usage: rsyslogd [-46AdhqQvw] [-cversion] [-lhostlist] [-mmarkinterval] [-n] [-p path]\n" \
		" [-s domainlist] [-r[port]] [-tport[,max-sessions]] [-gport[,max-sessions]] [-f conffile] [-i pidfile] [-x]\n\n");
	fprintf(stderr, "The following options are deprecated and are provided\n"
 		        "for compatibility reasons only:\n"
			"-mmarkinterval\n\n"
			"For further information see http://www.rsyslog.com/doc\n"
	       );
	exit(1); /* "good" exit - done to terminate usage() */
}


/* function to destruct a selector_t object
 * rgerhards, 2007-08-01
 */
rsRetVal
selectorDestruct(void *pVal)
{
	selector_t *pThis = (selector_t *) pVal;

	assert(pThis != NULL);

	if(pThis->pCSHostnameComp != NULL)
		rsCStrDestruct(&pThis->pCSHostnameComp);
	if(pThis->pCSProgNameComp != NULL)
		rsCStrDestruct(&pThis->pCSProgNameComp);

	if(pThis->f_filter_type == FILTER_PROP) {
		if(pThis->f_filterData.prop.pCSPropName != NULL)
			rsCStrDestruct(&pThis->f_filterData.prop.pCSPropName);
		if(pThis->f_filterData.prop.pCSCompValue != NULL)
			rsCStrDestruct(&pThis->f_filterData.prop.pCSCompValue);
	} else if(pThis->f_filter_type == FILTER_EXPR) {
		if(pThis->f_filterData.f_expr != NULL)
			expr.Destruct(&pThis->f_filterData.f_expr);
	}

	llDestroy(&pThis->llActList);
	free(pThis);
	
	return RS_RET_OK;
}


/* function to construct a selector_t object
 * rgerhards, 2007-08-01
 */
rsRetVal
selectorConstruct(selector_t **ppThis)
{
	DEFiRet;
	selector_t *pThis;

	assert(ppThis != NULL);
	
	if((pThis = (selector_t*) calloc(1, sizeof(selector_t))) == NULL) {
		glblHadMemShortage = 1;
		ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
	}
	CHKiRet(llInit(&pThis->llActList, actionDestruct, NULL, NULL));

finalize_it:
	if(iRet != RS_RET_OK) {
		if(pThis != NULL) {
			selectorDestruct(pThis);
		}
	}
	*ppThis = pThis;
	RETiRet;
}


/* rgerhards, 2005-10-24: crunch_list is called only during option processing. So
 * it is never called once rsyslogd is running (not even when HUPed). This code
 * contains some exits, but they are considered safe because they only happen
 * during startup. Anyhow, when we review the code here, we might want to
 * reconsider the exit()s.
 */
static char **crunch_list(char *list)
{
	int count, i;
	char *p, *q;
	char **result = NULL;

	p = list;
	
	/* strip off trailing delimiters */
	while (p[strlen(p)-1] == LIST_DELIMITER) {
		count--;
		p[strlen(p)-1] = '\0';
	}
	/* cut off leading delimiters */
	while (p[0] == LIST_DELIMITER) {
		count--;
		p++; 
	}
	
	/* count delimiters to calculate elements */
	for (count=i=0; p[i]; i++)
		if (p[i] == LIST_DELIMITER) count++;
	
	if ((result = (char **)malloc(sizeof(char *) * (count+2))) == NULL) {
		printf ("Sorry, can't get enough memory, exiting.\n");
		exit(0); /* safe exit, because only called during startup */
	}
	
	/*
	 * We now can assume that the first and last
	 * characters are different from any delimiters,
	 * so we don't have to care about this.
	 */
	count = 0;
	while ((q=strchr(p, LIST_DELIMITER))) {
		result[count] = (char *) malloc((q - p + 1) * sizeof(char));
		if (result[count] == NULL) {
			printf ("Sorry, can't get enough memory, exiting.\n");
			exit(0); /* safe exit, because only called during startup */
		}
		strncpy(result[count], p, q - p);
		result[count][q - p] = '\0';
		p = q; p++;
		count++;
	}
	if ((result[count] = \
	     (char *)malloc(sizeof(char) * strlen(p) + 1)) == NULL) {
		printf ("Sorry, can't get enough memory, exiting.\n");
		exit(0); /* safe exit, because only called during startup */
	}
	strcpy(result[count],p);
	result[++count] = NULL;

#if 0
	count=0;
	while (result[count])
		dbgprintf("#%d: %s\n", count, StripDomains[count++]);
#endif
	return result;
}


void untty(void)
#ifdef HAVE_SETSID
{
	if ( !Debug ) {
		setsid();
	}
	return;
}
#else
{
	int i;

	if ( !Debug ) {
		i = open(_PATH_TTY, O_RDWR);
		if (i >= 0) {
#			if !defined(__hpux)
				(void) ioctl(i, (int) TIOCNOTTY, (char *)0);
#			else
				/* TODO: we need to implement something for HP UX! -- rgerhards, 2008-03-04 */
				/* actually, HP UX should have setsid, so the code directly above should
				 * trigger. So the actual question is why it doesn't do that...
				 */
#			endif
			(void) close(i);
		}
	}
}
#endif


/* Take a raw input line, decode the message, and print the message
 * on the appropriate log files.
 * rgerhards 2004-11-08: Please note
 * that this function does only a partial decoding. At best, it splits 
 * the PRI part. No further decode happens. The rest is done in 
 * logmsg().
 * Added the iSource parameter so that we know if we have to parse
 * HOSTNAME or not. rgerhards 2004-11-16.
 * changed parameter iSource to bParseHost. For details, see comment in
 * printchopped(). rgerhards 2005-10-06
 * rgerhards: 2008-03-06: added "flags" to allow an input module to specify
 * flags, most importantly to request ignoring the messages' timestamp.
 *
 * rgerhards, 2008-03-19:
 * I added an additional calling parameter to permit specifying the flow
 * control capability of the source.
 */
rsRetVal printline(char *hname, char *msg, int bParseHost, int flags, flowControl_t flowCtlType)
{
	DEFiRet;
	register char *p;
	int pri;
	msg_t *pMsg;

	/* Now it is time to create the message object (rgerhards)
	*/
	CHKiRet(msgConstruct(&pMsg));
	MsgSetFlowControlType(pMsg, flowCtlType);
	MsgSetRawMsg(pMsg, msg);
	
	pMsg->bParseHOSTNAME  = bParseHost;
	/* test for special codes */
	pri = DEFUPRI;
	p = msg;
	if (*p == '<') {
		pri = 0;
		while (isdigit((int) *++p))
		{
		   pri = 10 * pri + (*p - '0');
		}
		if (*p == '>')
			++p;
	}
	if (pri &~ (LOG_FACMASK|LOG_PRIMASK))
		pri = DEFUPRI;
	pMsg->iFacility = LOG_FAC(pri);
	pMsg->iSeverity = LOG_PRI(pri);

	/* Now we look at the HOSTNAME. That is a bit complicated...
	 * If we have a locally received message, it does NOT
	 * contain any hostname information in the message itself.
	 * As such, the HOSTNAME is the same as the system that
	 * the message was received from (that, for obvious reasons,
	 * being the local host).  rgerhards 2004-11-16
	 */
	if(bParseHost == 0)
		MsgSetHOSTNAME(pMsg, hname);
	MsgSetRcvFrom(pMsg, hname);

	/* rgerhards 2004-11-19: well, well... we've now seen that we
	 * have the "hostname problem" also with the traditional Unix
	 * message. As we like to emulate it, we need to add the hostname
	 * to it.
	 */
	if(MsgSetUxTradMsg(pMsg, p) != 0)
		ABORT_FINALIZE(RS_RET_ERR);

	logmsg(pMsg, flags | SYNC_FILE);

finalize_it:
	RETiRet;
}


/* This takes a received message that must be decoded and submits it to
 * the main message queue. The function calls the necessary parser.
 *
 * rgerhards, 2006-11-30: I have greatly changed this function. Formerly,
 * it tried to reassemble multi-part messages, which is a legacy stock
 * sysklogd concept. In essence, that was that messages not ending with
 * \0 were glued together. As far as I can see, this is a sysklogd
 * specific feature and, from looking at the code, seems to be used
 * pretty seldom (if at all). I remove this now, not the least because it is totally
 * incompatible with upcoming IETF syslog standards. If you experience
 * strange behaviour with messages beeing split across multiple lines,
 * this function here might be the place to look at.
 *
 * Some previous history worth noting:
 * I added the "iSource" parameter. This is needed to distinguish between
 * messages that have a hostname in them (received from the internet) and
 * those that do not have (most prominently /dev/log).  rgerhards 2004-11-16
 * And now I removed the "iSource" parameter and changed it to be "bParseHost",
 * because all that it actually controls is whether the host is parsed or not.
 * For rfc3195 support, we needed to modify the algo for host parsing, so we can
 * no longer rely just on the source (rfc3195d forwarded messages arrive via
 * unix domain sockets but contain the hostname). rgerhards, 2005-10-06
 *
 * rgerhards, 2008-02-18:
 * This function was previously called "printchopped"() and has been renamed
 * as part of the effort to create a clean internal message submission interface.
 * It also has been adopted to our usual calling interface, but currently does
 * not provide any useful return states. But we now have the hook and things can
 * improve in the future. <-- TODO!
 *
 * rgerhards, 2008-03-19:
 * I added an additional calling parameter to permit specifying the flow
 * control capability of the source.
 */
rsRetVal
parseAndSubmitMessage(char *hname, char *msg, int len, int bParseHost, int flags, flowControl_t flowCtlType)
{
	DEFiRet;
	register int iMsg;
	char *pMsg;
	char *pData;
	char *pEnd;
	char tmpline[MAXLINE + 1];
#	ifdef USE_NETZIP
	char deflateBuf[MAXLINE + 1];
	uLongf iLenDefBuf;
#	endif

	assert(hname != NULL);
	assert(msg != NULL);
	assert(len >= 0);

	/* we first check if we have a NUL character at the very end of the
	 * message. This seems to be a frequent problem with a number of senders.
	 * So I have now decided to drop these NULs. However, if they are intentional,
	 * that may cause us some problems, e.g. with syslog-sign. On the other hand,
	 * current code always has problems with intentional NULs (as it needs to escape
	 * them to prevent problems with the C string libraries), so that does not
	 * really matter. Just to be on the save side, we'll log destruction of such
	 * NULs in the debug log.
	 * rgerhards, 2007-09-14
	 */
	if(*(msg + len - 1) == '\0') {
		dbgprintf("dropped NUL at very end of message\n");
		len--;
	}

	/* then we check if we need to drop trailing LFs, which often make
	 * their way into syslog messages unintentionally. In order to remain
	 * compatible to recent IETF developments, we allow the user to
	 * turn on/off this handling.  rgerhards, 2007-07-23
	 */
	if(bDropTrailingLF && *(msg + len - 1) == '\n') {
		dbgprintf("dropped LF at very end of message (DropTrailingLF is set)\n");
		len--;
	}

	iMsg = 0;	/* initialize receiving buffer index */
	pMsg = tmpline; /* set receiving buffer pointer */
	pData = msg;	/* set source buffer pointer */
	pEnd = msg + len; /* this is one off, which is intensional */

#	ifdef USE_NETZIP
	/* we first need to check if we have a compressed record. If so,
	 * we must decompress it.
	 */
	if(len > 0 && *msg == 'z') { /* compressed data present? (do NOT change order if conditions!) */
		/* we have compressed data, so let's deflate it. We support a maximum
		 * message size of MAXLINE. If it is larger, an error message is logged
		 * and the message is dropped. We do NOT try to decompress larger messages
		 * as such might be used for denial of service. It might happen to later
		 * builds that such functionality be added as an optional, operator-configurable
		 * feature.
		 */
		int ret;
		iLenDefBuf = MAXLINE;
		ret = uncompress((uchar *) deflateBuf, &iLenDefBuf, (uchar *) msg+1, len-1);
		dbgprintf("Compressed message uncompressed with status %d, length: new %ld, old %d.\n",
		        ret, (long) iLenDefBuf, len-1);
		/* Now check if the uncompression worked. If not, there is not much we can do. In
		 * that case, we log an error message but ignore the message itself. Storing the
		 * compressed text is dangerous, as it contains control characters. So we do
		 * not do this. If someone would like to have a copy, this code here could be
		 * modified to do a hex-dump of the buffer in question. We do not include
		 * this functionality right now.
		 * rgerhards, 2006-12-07
		 */
		if(ret != Z_OK) {
			errmsg.LogError(NO_ERRCODE, "Uncompression of a message failed with return code %d "
			            "- enable debug logging if you need further information. "
				    "Message ignored.", ret);
			FINALIZE; /* unconditional exit, nothing left to do... */
		}
		pData = deflateBuf;
		pEnd = deflateBuf + iLenDefBuf;
	}
#	else /* ifdef USE_NETZIP */
	/* in this case, we still need to check if the message is compressed. If so, we must
	 * tell the user we can not accept it.
	 */
	if(len > 0 && *msg == 'z') {
		errmsg.LogError(NO_ERRCODE, "Received a compressed message, but rsyslogd does not have compression "
		         "support enabled. The message will be ignored.");
		FINALIZE;
	}	
#	endif /* ifdef USE_NETZIP */

	while(pData < pEnd) {
		if(iMsg >= MAXLINE) {
			/* emergency, we now need to flush, no matter if
			 * we are at end of message or not...
			 */
			if(iMsg == MAXLINE) {
				*(pMsg + iMsg) = '\0'; /* space *is* reserved for this! */
				printline(hname, tmpline, bParseHost, flags, flowCtlType);
			} else {
				/* This case in theory never can happen. If it happens, we have
				 * a logic error. I am checking for it, because if I would not,
				 * we would address memory invalidly with the code above. I
				 * do not care much about this case, just a debug log entry
				 * (I couldn't do any more smart things anyway...).
				 * rgerhards, 2007-9-20
				 */
				dbgprintf("internal error: iMsg > MAXLINE in printchopped()\n");
			}
			FINALIZE; /* in this case, we are done... nothing left we can do */
		}
		if(*pData == '\0') { /* guard against \0 characters... */
			/* changed to the sequence (somewhat) proposed in
			 * draft-ietf-syslog-protocol-19. rgerhards, 2006-11-30
			 */
			if(iMsg + 3 < MAXLINE) { /* do we have space? */
				*(pMsg + iMsg++) =  cCCEscapeChar;
				*(pMsg + iMsg++) = '0';
				*(pMsg + iMsg++) = '0';
				*(pMsg + iMsg++) = '0';
			} /* if we do not have space, we simply ignore the '\0'... */
			  /* log an error? Very questionable... rgerhards, 2006-11-30 */
			  /* decided: we do not log an error, it won't help... rger, 2007-06-21 */
			++pData;
		} else if(bEscapeCCOnRcv && iscntrl((int) *pData)) {
			/* we are configured to escape control characters. Please note
			 * that this most probably break non-western character sets like
			 * Japanese, Korean or Chinese. rgerhards, 2007-07-17
			 * Note: sysklogd logs octal values only for DEL and CCs above 127.
			 * For others, it logs ^n where n is the control char converted to an
			 * alphabet character. We like consistency and thus escape it to octal
			 * in all cases. If someone complains, we may change the mode. At least
			 * we known now what's going on.
			 * rgerhards, 2007-07-17
			 */
			if(iMsg + 3 < MAXLINE) { /* do we have space? */
				*(pMsg + iMsg++) = cCCEscapeChar;
				*(pMsg + iMsg++) = '0' + ((*pData & 0300) >> 6);
				*(pMsg + iMsg++) = '0' + ((*pData & 0070) >> 3);
				*(pMsg + iMsg++) = '0' + ((*pData & 0007));
			} /* again, if we do not have space, we ignore the char - see comment at '\0' */
			++pData;
		} else {
			*(pMsg + iMsg++) = *pData++;
		}
	}

	*(pMsg + iMsg) = '\0'; /* space *is* reserved for this! */

	/* typically, we should end up here! */
	printline(hname, tmpline, bParseHost, flags, flowCtlType);

finalize_it:
	RETiRet;
}

/* rgerhards 2004-11-09: the following is a function that can be used
 * to log a message orginating from the syslogd itself. In sysklogd code,
 * this is done by simply calling logmsg(). However, logmsg() is changed in
 * rsyslog so that it takes a msg "object". So it can no longer be called
 * directly. This method here solves the need. It provides an interface that
 * allows to construct a locally-generated message. Please note that this
 * function here probably is only an interim solution and that we need to
 * think on the best way to do this.
 */
rsRetVal
logmsgInternal(int pri, char *msg, int flags)
{
	DEFiRet;
	msg_t *pMsg;

	CHKiRet(msgConstruct(&pMsg));
	MsgSetUxTradMsg(pMsg, msg);
	MsgSetRawMsg(pMsg, msg);
	MsgSetHOSTNAME(pMsg, LocalHostName);
	MsgSetRcvFrom(pMsg, LocalHostName);
	MsgSetTAG(pMsg, "rsyslogd:");
	pMsg->iFacility = LOG_FAC(pri);
	pMsg->iSeverity = LOG_PRI(pri);
	pMsg->bParseHOSTNAME = 0;
	datetime.getCurrTime(&(pMsg->tTIMESTAMP)); /* use the current time! */
	flags |= INTERNAL_MSG;

	if(bHaveMainQueue == 0) { /* not yet in queued mode */
		iminternalAddMsg(pri, pMsg, flags);
	} else {
		/* we have the queue, so we can simply provide the 
		 * message to the queue engine.
		 */
		logmsg(pMsg, flags);
	}
finalize_it:
	RETiRet;
}

/* This functions looks at the given message and checks if it matches the
 * provided filter condition. If so, it returns true, else it returns
 * false. This is a helper to logmsg() and meant to drive the decision
 * process if a message is to be processed or not. As I expect this
 * decision code to grow more complex over time AND logmsg() is already
 * a very lengthy function, I thought a separate function is more appropriate.
 * 2005-09-19 rgerhards
 * 2008-02-25 rgerhards: changed interface, now utilizes iRet, bProcessMsg
 * returns is message should be procesed.
 */
static rsRetVal shouldProcessThisMessage(selector_t *f, msg_t *pMsg, int *bProcessMsg)
{
	DEFiRet;
	unsigned short pbMustBeFreed;
	char *pszPropVal;
	int bRet = 0;
	vm_t *pVM;
	var_t *pResult;

	assert(f != NULL);
	assert(pMsg != NULL);

	/* we first have a look at the global, BSD-style block filters (for tag
	 * and host). Only if they match, we evaluate the actual filter.
	 * rgerhards, 2005-10-18
	 */
	if(f->eHostnameCmpMode == HN_NO_COMP) {
		/* EMPTY BY INTENSION - we check this value first, because
		 * it is the one most often used, so this saves us time!
		 */
	} else if(f->eHostnameCmpMode == HN_COMP_MATCH) {
		if(rsCStrSzStrCmp(f->pCSHostnameComp, (uchar*) getHOSTNAME(pMsg), getHOSTNAMELen(pMsg))) {
			/* not equal, so we are already done... */
			dbgprintf("hostname filter '+%s' does not match '%s'\n", 
				rsCStrGetSzStrNoNULL(f->pCSHostnameComp), getHOSTNAME(pMsg));
			FINALIZE;
		}
	} else { /* must be -hostname */
		if(!rsCStrSzStrCmp(f->pCSHostnameComp, (uchar*) getHOSTNAME(pMsg), getHOSTNAMELen(pMsg))) {
			/* not equal, so we are already done... */
			dbgprintf("hostname filter '-%s' does not match '%s'\n", 
				rsCStrGetSzStrNoNULL(f->pCSHostnameComp), getHOSTNAME(pMsg));
			FINALIZE;
		}
	}
	
	if(f->pCSProgNameComp != NULL) {
		int bInv = 0, bEqv = 0, offset = 0;
		if(*(rsCStrGetSzStrNoNULL(f->pCSProgNameComp)) == '-') {
			if(*(rsCStrGetSzStrNoNULL(f->pCSProgNameComp) + 1) == '-')
				offset = 1;
			else {
				bInv = 1;
				offset = 1;
			}
		}
		if(!rsCStrOffsetSzStrCmp(f->pCSProgNameComp, offset, (uchar*) getProgramName(pMsg), getProgramNameLen(pMsg)))
			bEqv = 1;

		if((!bEqv && !bInv) || (bEqv && bInv)) {
			/* not equal or inverted selection, so we are already done... */
			dbgprintf("programname filter '%s' does not match '%s'\n", 
				rsCStrGetSzStrNoNULL(f->pCSProgNameComp), getProgramName(pMsg));
			FINALIZE;
		}
	}
	
	/* done with the BSD-style block filters */

	if(f->f_filter_type == FILTER_PRI) {
		/* skip messages that are incorrect priority */
		if ( (f->f_filterData.f_pmask[pMsg->iFacility] == TABLE_NOPRI) || \
		    ((f->f_filterData.f_pmask[pMsg->iFacility] & (1<<pMsg->iSeverity)) == 0) )
			bRet = 0;
		else
			bRet = 1;
	} else if(f->f_filter_type == FILTER_EXPR) {
		CHKiRet(vm.Construct(&pVM));
		CHKiRet(vm.ConstructFinalize(pVM));
		CHKiRet(vm.SetMsg(pVM, pMsg));
		CHKiRet(vm.ExecProg(pVM, f->f_filterData.f_expr->pVmprg));
		CHKiRet(vm.PopBoolFromStack(pVM, &pResult));
		dbgprintf("result of expression evaluation: %lld\n", pResult->val.num);
		CHKiRet(vm.Destruct(&pVM));
		bRet = (pResult->val.num) ? 1 : 0;
	} else {
		assert(f->f_filter_type == FILTER_PROP); /* assert() just in case... */
		pszPropVal = MsgGetProp(pMsg, NULL, f->f_filterData.prop.pCSPropName, &pbMustBeFreed);

		/* Now do the compares (short list currently ;)) */
		switch(f->f_filterData.prop.operation ) {
		case FIOP_CONTAINS:
			if(rsCStrLocateInSzStr(f->f_filterData.prop.pCSCompValue, (uchar*) pszPropVal) != -1)
				bRet = 1;
			break;
		case FIOP_ISEQUAL:
			if(rsCStrSzStrCmp(f->f_filterData.prop.pCSCompValue,
					  (uchar*) pszPropVal, strlen(pszPropVal)) == 0)
				bRet = 1; /* process message! */
			break;
		case FIOP_STARTSWITH:
			if(rsCStrSzStrStartsWithCStr(f->f_filterData.prop.pCSCompValue,
					  (uchar*) pszPropVal, strlen(pszPropVal)) == 0)
				bRet = 1; /* process message! */
			break;
		case FIOP_REGEX:
			if(rsCStrSzStrMatchRegex(f->f_filterData.prop.pCSCompValue,
					  (unsigned char*) pszPropVal) == 0)
				bRet = 1;
			break;
		default:
			/* here, it handles NOP (for performance reasons) */
			assert(f->f_filterData.prop.operation == FIOP_NOP);
			bRet = 1; /* as good as any other default ;) */
			break;
		}

		/* now check if the value must be negated */
		if(f->f_filterData.prop.isNegated)
			bRet = (bRet == 1) ?  0 : 1;

		if(Debug) {
			dbgprintf("Filter: check for property '%s' (value '%s') ",
			        rsCStrGetSzStrNoNULL(f->f_filterData.prop.pCSPropName),
			        pszPropVal);
			if(f->f_filterData.prop.isNegated)
				dbgprintf("NOT ");
			dbgprintf("%s '%s': %s\n",
			       getFIOPName(f->f_filterData.prop.operation),
			       rsCStrGetSzStrNoNULL(f->f_filterData.prop.pCSCompValue),
			       bRet ? "TRUE" : "FALSE");
		}

		/* cleanup */
		if(pbMustBeFreed)
			free(pszPropVal);
	}

finalize_it:
	*bProcessMsg = bRet;
	RETiRet;
}


/* helper to processMsg(), used to call the configured actions. It is
 * executed from within llExecFunc() of the action list.
 * rgerhards, 2007-08-02
 */
typedef struct processMsgDoActions_s {
	int bPrevWasSuspended; /* was the previous action suspended? */
	msg_t *pMsg;
} processMsgDoActions_t;
DEFFUNC_llExecFunc(processMsgDoActions)
{
	DEFiRet;
	rsRetVal iRetMod;	/* return value of module - we do not always pass that back */
	action_t *pAction = (action_t*) pData;
	processMsgDoActions_t *pDoActData = (processMsgDoActions_t*) pParam;

	assert(pAction != NULL);

	if((pAction->bExecWhenPrevSusp  == 1) && (pDoActData->bPrevWasSuspended == 0)) {
		dbgprintf("not calling action because the previous one is not suspended\n");
		ABORT_FINALIZE(RS_RET_OK);
	}

	iRetMod = actionCallAction(pAction, pDoActData->pMsg);
	if(iRetMod == RS_RET_DISCARDMSG) {
		ABORT_FINALIZE(RS_RET_DISCARDMSG);
	} else if(iRetMod == RS_RET_SUSPENDED) {
		/* indicate suspension for next module to be called */
		pDoActData->bPrevWasSuspended = 1;
	} else {
		pDoActData->bPrevWasSuspended = 0;
	}

finalize_it:
	RETiRet;
}


/* Process (consume) a received message. Calls the actions configured.
 * rgerhards, 2005-10-13
 */
static void
processMsg(msg_t *pMsg)
{
	selector_t *f;
	int bContinue;
	int bProcessMsg;
	processMsgDoActions_t DoActData;
	rsRetVal iRet;

	BEGINfunc
	assert(pMsg != NULL);

	/* log the message to the particular outputs */

	bContinue = 1;
	for (f = Files; f != NULL && bContinue ; f = f->f_next) {
		/* first check the filters... */
		iRet = shouldProcessThisMessage(f, pMsg, &bProcessMsg);
		if(!bProcessMsg) {
			continue;
		}

		/* ok -- from here, we have action-specific code, nothing really selector-specific -- rger 2007-08-01 */
		DoActData.pMsg = pMsg;
		DoActData.bPrevWasSuspended = 0;
		if(llExecFunc(&f->llActList, processMsgDoActions, (void*)&DoActData) == RS_RET_DISCARDMSG)
			bContinue = 0;
	}
	ENDfunc
}


/* The consumer of dequeued messages. This function is called by the
 * queue engine on dequeueing of a message. It runs on a SEPARATE
 * THREAD.
 * NOTE: Having more than one worker requires guarding of some
 * message object structures and potentially others - need to be checked
 * before we support multiple worker threads on the message queue.
 * Please note: the message object is destructed by the queue itself!
 */
static rsRetVal
msgConsumer(void __attribute__((unused)) *notNeeded, void *pUsr)
{
	DEFiRet;
	msg_t *pMsg = (msg_t*) pUsr;

	assert(pMsg != NULL);

	processMsg(pMsg);
	msgDestruct(&pMsg);

	RETiRet;
}


/* Helper to parseRFCSyslogMsg. This function parses a field up to
 * (and including) the SP character after it. The field contents is
 * returned in a caller-provided buffer. The parsepointer is advanced
 * to after the terminating SP. The caller must ensure that the 
 * provided buffer is large enough to hold the to be extracted value.
 * Returns 0 if everything is fine or 1 if either the field is not
 * SP-terminated or any other error occurs.
 * rger, 2005-11-24
 */
static int parseRFCField(char **pp2parse, char *pResult)
{
	char *p2parse;
	int iRet = 0;

	assert(pp2parse != NULL);
	assert(*pp2parse != NULL);
	assert(pResult != NULL);

	p2parse = *pp2parse;

	/* this is the actual parsing loop */
	while(*p2parse && *p2parse != ' ') {
		*pResult++ = *p2parse++;
	}

	if(*p2parse == ' ')
		++p2parse; /* eat SP, but only if not at end of string */
	else
		iRet = 1; /* there MUST be an SP! */
	*pResult = '\0';

	/* set the new parse pointer */
	*pp2parse = p2parse;
	return 0;
}


/* Helper to parseRFCSyslogMsg. This function parses the structured
 * data field of a message. It does NOT parse inside structured data,
 * just gets the field as whole. Parsing the single entities is left
 * to other functions. The parsepointer is advanced
 * to after the terminating SP. The caller must ensure that the 
 * provided buffer is large enough to hold the to be extracted value.
 * Returns 0 if everything is fine or 1 if either the field is not
 * SP-terminated or any other error occurs.
 * rger, 2005-11-24
 */
static int parseRFCStructuredData(char **pp2parse, char *pResult)
{
	char *p2parse;
	int bCont = 1;
	int iRet = 0;

	assert(pp2parse != NULL);
	assert(*pp2parse != NULL);
	assert(pResult != NULL);

	p2parse = *pp2parse;

	/* this is the actual parsing loop
	 * Remeber: structured data starts with [ and includes any characters
	 * until the first ] followed by a SP. There may be spaces inside
	 * structured data. There may also be \] inside the structured data, which
	 * do NOT terminate an element.
	 */
	if(*p2parse != '[')
		return 1; /* this is NOT structured data! */

	while(bCont) {
		if(*p2parse == '\0') {
			iRet = 1; /* this is not valid! */
			bCont = 0;
		} else if(*p2parse == '\\' && *(p2parse+1) == ']') {
			/* this is escaped, need to copy both */
			*pResult++ = *p2parse++;
			*pResult++ = *p2parse++;
		} else if(*p2parse == ']' && *(p2parse+1) == ' ') {
			/* found end, just need to copy the ] and eat the SP */
			*pResult++ = *p2parse;
			p2parse += 2;
			bCont = 0;
		} else {
			*pResult++ = *p2parse++;
		}
	}

	if(*p2parse == ' ')
		++p2parse; /* eat SP, but only if not at end of string */
	else
		iRet = 1; /* there MUST be an SP! */
	*pResult = '\0';

	/* set the new parse pointer */
	*pp2parse = p2parse;
	return 0;
}

/* parse a RFC-formatted syslog message. This function returns
 * 0 if processing of the message shall continue and 1 if something
 * went wrong and this messe should be ignored. This function has been
 * implemented in the effort to support syslog-protocol. Please note that
 * the name (parse *RFC*) stems from the hope that syslog-protocol will
 * some time become an RFC. Do not confuse this with informational
 * RFC 3164 (which is legacy syslog).
 *
 * currently supported format:
 *
 * <PRI>VERSION SP TIMESTAMP SP HOSTNAME SP APP-NAME SP PROCID SP MSGID SP [SD-ID]s SP MSG
 *
 * <PRI> is already stripped when this function is entered. VERSION already
 * has been confirmed to be "1", but has NOT been stripped from the message.
 *
 * rger, 2005-11-24
 */
static int parseRFCSyslogMsg(msg_t *pMsg, int flags)
{
	char *p2parse;
	char *pBuf;
	int bContParse = 1;

	assert(pMsg != NULL);
	assert(pMsg->pszUxTradMsg != NULL);
	p2parse = (char*) pMsg->pszUxTradMsg;

	/* do a sanity check on the version and eat it */
	assert(p2parse[0] == '1' && p2parse[1] == ' ');
	p2parse += 2;

	/* Now get us some memory we can use as a work buffer while parsing.
	 * We simply allocated a buffer sufficiently large to hold all of the
	 * message, so we can not run into any troubles. I think this is
	 * more wise then to use individual buffers.
	 */
	if((pBuf = malloc(sizeof(char)* strlen(p2parse) + 1)) == NULL)
		return 1;
		
	/* IMPORTANT NOTE:
	 * Validation is not actually done below nor are any errors handled. I have
	 * NOT included this for the current proof of concept. However, it is strongly
	 * advisable to add it when this code actually goes into production.
	 * rgerhards, 2005-11-24
	 */

	/* TIMESTAMP */
	if(datetime.ParseTIMESTAMP3339(&(pMsg->tTIMESTAMP),  &p2parse) == FALSE) {
		dbgprintf("no TIMESTAMP detected!\n");
		bContParse = 0;
		flags |= ADDDATE;
	}

	if (flags & ADDDATE) {
		datetime.getCurrTime(&(pMsg->tTIMESTAMP)); /* use the current time! */
	}

	/* HOSTNAME */
	if(bContParse) {
		parseRFCField(&p2parse, pBuf);
		MsgSetHOSTNAME(pMsg, pBuf);
	} else {
		/* we can not parse, so we get the system we
		 * received the data from.
		 */
		MsgSetHOSTNAME(pMsg, getRcvFrom(pMsg));
	}

	/* APP-NAME */
	if(bContParse) {
		parseRFCField(&p2parse, pBuf);
		MsgSetAPPNAME(pMsg, pBuf);
	}

	/* PROCID */
	if(bContParse) {
		parseRFCField(&p2parse, pBuf);
		MsgSetPROCID(pMsg, pBuf);
	}

	/* MSGID */
	if(bContParse) {
		parseRFCField(&p2parse, pBuf);
		MsgSetMSGID(pMsg, pBuf);
	}

	/* STRUCTURED-DATA */
	if(bContParse) {
		parseRFCStructuredData(&p2parse, pBuf);
		MsgSetStructuredData(pMsg, pBuf);
	}

	/* MSG */
	MsgSetMSG(pMsg, p2parse);

	free(pBuf);
	return 0; /* all ok */
}


/* parse a legay-formatted syslog message. This function returns
 * 0 if processing of the message shall continue and 1 if something
 * went wrong and this messe should be ignored. This function has been
 * implemented in the effort to support syslog-protocol.
 * rger, 2005-11-24
 * As of 2006-01-10, I am removing the logic to continue parsing only
 * when a valid TIMESTAMP is detected. Validity of other fields already
 * is ignored. This is due to the fact that the parser has grown smarter
 * and is now more able to understand different dialects of the syslog
 * message format. I do not expect any bad side effects of this change,
 * but I thought I log it in this comment.
 * rgerhards, 2006-01-10
 */
static int parseLegacySyslogMsg(msg_t *pMsg, int flags)
{
	char *p2parse;
	char *pBuf;
	char *pWork;
	cstr_t *pStrB;
	int iCnt;
	int bTAGCharDetected;

	assert(pMsg != NULL);
	assert(pMsg->pszUxTradMsg != NULL);
	p2parse = (char*) pMsg->pszUxTradMsg;

	/* Check to see if msg contains a timestamp
	 */
	if(datetime.ParseTIMESTAMP3164(&(pMsg->tTIMESTAMP), p2parse) == TRUE)
		p2parse += 16;
	else {
		flags |= ADDDATE;
	}

	/* here we need to check if the timestamp is valid. If it is not,
	 * we can not continue to parse but must treat the rest as the 
	 * MSG part of the message (as of RFC 3164).
	 * rgerhards 2004-12-03
	 */
	if(flags & ADDDATE) {
		datetime.getCurrTime(&(pMsg->tTIMESTAMP)); /* use the current time! */
	}

	/* rgerhards, 2006-03-13: next, we parse the hostname and tag. But we 
	 * do this only when the user has not forbidden this. I now introduce some
	 * code that allows a user to configure rsyslogd to treat the rest of the
	 * message as MSG part completely. In this case, the hostname will be the
	 * machine that we received the message from and the tag will be empty. This
	 * is meant to be an interim solution, but for now it is in the code.
	 */

	if(bParseHOSTNAMEandTAG && !(flags & INTERNAL_MSG)) {
		/* parse HOSTNAME - but only if this is network-received!
		 * rger, 2005-11-14: we still have a problem with BSD messages. These messages
		 * do NOT include a host name. In most cases, this leads to the TAG to be treated
		 * as hostname and the first word of the message as the TAG. Clearly, this is not
		 * of advantage ;) I think I have now found a way to handle this situation: there
		 * are certain characters which are frequently used in TAG (e.g. ':'), which are
		 * *invalid* in host names. So while parsing the hostname, I check for these characters.
		 * If I find them, I set a simple flag but continue. After parsing, I check the flag.
		 * If it was set, then we most probably do not have a hostname but a TAG. Thus, I change
		 * the fields. I think this logic shall work with any type of syslog message.
		 */
		bTAGCharDetected = 0;
		if(pMsg->bParseHOSTNAME) {
			/* TODO: quick and dirty memory allocation */
			/* the memory allocated is far too much in most cases. But on the plus side,
			 * it is quite fast... - rgerhards, 2007-09-20
			 */
			if((pBuf = malloc(sizeof(char)* (strlen(p2parse) +1))) == NULL)
				return 1;
			pWork = pBuf;
			/* this is the actual parsing loop */
			while(*p2parse && *p2parse != ' ' && *p2parse != ':') {
				if(*p2parse == '[' || *p2parse == ']' || *p2parse == '/')
					bTAGCharDetected = 1;
				*pWork++ = *p2parse++;
			}
			/* we need to handle ':' seperately, because it terminates the
			 * TAG - so we also need to terminate the parser here!
			 * rgerhards, 2007-09-10 *p2parse points to a valid address here in 
			 * any case. We can reach this point only if we are at end of string,
			 * or we have a ':' or ' '. What the if below does is check if we are
			 * not at end of string and, if so, advance the parse pointer. If we 
			 * are already at end of string, *p2parse is equal to '\0', neither if
			 * will be true and the parse pointer remain as is. This is perfectly
			 * well.
			 */
			if(*p2parse == ':') {
				bTAGCharDetected = 1;
				/* We will move hostname to tag, so preserve ':' (otherwise we 
				 * will needlessly change the message format) */
				*pWork++ = *p2parse++; 
			} else if(*p2parse == ' ')
				++p2parse;
			*pWork = '\0';
			MsgAssignHOSTNAME(pMsg, pBuf);
		}
		/* check if we seem to have a TAG */
		if(bTAGCharDetected) {
			/* indeed, this smells like a TAG, so lets use it for this. We take
			 * the HOSTNAME from the sender system instead.
			 */
			dbgprintf("HOSTNAME contains invalid characters, assuming it to be a TAG.\n");
			moveHOSTNAMEtoTAG(pMsg);
			MsgSetHOSTNAME(pMsg, getRcvFrom(pMsg));
		}

		/* now parse TAG - that should be present in message from
		 * all sources.
		 * This code is somewhat not compliant with RFC 3164. As of 3164,
		 * the TAG field is ended by any non-alphanumeric character. In
		 * practice, however, the TAG often contains dashes and other things,
		 * which would end the TAG. So it is not desirable. As such, we only
		 * accept colon and SP to be terminators. Even there is a slight difference:
		 * a colon is PART of the TAG, while a SP is NOT part of the tag
		 * (it is CONTENT). Finally, we allow only up to 32 characters for
		 * TAG, as it is specified in RFC 3164.
		 */
		/* The following code in general is quick & dirty - I need to get
		 * it going for a test, rgerhards 2004-11-16 */
		/* lol.. we tried to solve it, just to remind ourselfs that 32 octets
		 * is the max size ;) we need to shuffle the code again... Just for 
		 * the records: the code is currently clean, but we could optimize it! */
		if(!bTAGCharDetected) {
			uchar *pszTAG;
			if(rsCStrConstruct(&pStrB) != RS_RET_OK) 
				return 1;
			rsCStrSetAllocIncrement(pStrB, 33);
			pWork = pBuf;
			iCnt = 0;
			while(*p2parse && *p2parse != ':' && *p2parse != ' ' && iCnt < 32) {
				rsCStrAppendChar(pStrB, *p2parse++);
				++iCnt;
			}
			if (iCnt == 32) {
                            while(*p2parse && *p2parse != ':' && *p2parse != ' ') {
                                ++p2parse;
                            }
                        }
			if(*p2parse == ':') {
				++p2parse; 
				rsCStrAppendChar(pStrB, ':');
			}
			rsCStrFinish(pStrB);

			rsCStrConvSzStrAndDestruct(pStrB, &pszTAG, 1);
			if(pszTAG == NULL)
			{	/* rger, 2005-11-10: no TAG found - this implies that what
				 * we have considered to be the HOSTNAME is most probably the
				 * TAG. We consider it so probable, that we now adjust it
				 * that way. So we pick up the previously set hostname, assign
				 * it to tag and use the sender system (from IP stack) as
				 * the hostname. This situation is the standard case with
				 * stock BSD syslogd.
				 */
				dbgprintf("No TAG in message, assuming that HOSTNAME is missing.\n");
				moveHOSTNAMEtoTAG(pMsg);
				MsgSetHOSTNAME(pMsg, getRcvFrom(pMsg));
			} else { /* we have a TAG, so we can happily set it ;) */
				MsgAssignTAG(pMsg, pszTAG);
			}
		} else {
			/* we have no TAG, so we ... */
			/*DO NOTHING*/;
		}
	} else {
		/* we enter this code area when the user has instructed rsyslog NOT
		 * to parse HOSTNAME and TAG - rgerhards, 2006-03-13
		 */
		if(!(flags & INTERNAL_MSG))
		{
			dbgprintf("HOSTNAME and TAG not parsed by user configuraton.\n");
			MsgSetHOSTNAME(pMsg, getRcvFrom(pMsg));
		}
	}

	/* The rest is the actual MSG */
	MsgSetMSG(pMsg, p2parse);

	return 0; /* all ok */
}


/* submit a fully created message to the main message queue. The message is
 * fully processed and parsed, so no parsing at all happens. This is primarily
 * a hook to prevent the need for callers to know about the main message queue
 * (which may change in the future as we will probably have multiple rule
 * sets and thus queues...).
 * rgerhards, 2008-02-13
 */
rsRetVal
submitMsg(msg_t *pMsg)
{
	DEFiRet;

	ISOBJ_TYPE_assert(pMsg, msg);
	
	MsgPrepareEnqueue(pMsg);
	queueEnqObj(pMsgQueue, pMsg->flowCtlType, (void*) pMsg);

	RETiRet;
}


/*
 * Log a message to the appropriate log files, users, etc. based on
 * the priority.
 * rgerhards 2004-11-08: actually, this also decodes all but the PRI part.
 * rgerhards 2004-11-09: ... but only, if syslogd could properly be initialized
 *			 if not, we use emergency logging to the console and in
 *                       this case, no further decoding happens.
 * changed to no longer receive a plain message but a msg object instead.
 * rgerhards-2004-11-16: OK, we are now up to another change... This method
 * actually needs to PARSE the message. How exactly this needs to happen depends on
 * a number of things. Most importantly, it depends on the source. For example,
 * locally received messages (SOURCE_UNIXAF) do NOT have a hostname in them. So
 * we need to treat them differntly form network-received messages which have.
 * Well, actually not all network-received message really have a hostname. We
 * can just hope they do, but we can not be sure. So this method tries to find
 * whatever can be found in the message and uses that... Obviously, there is some
 * potential for misinterpretation, which we simply can not solve under the
 * circumstances given.
 */
void
logmsg(msg_t *pMsg, int flags)
{
	char *msg;

	BEGINfunc
	assert(pMsg != NULL);
	assert(pMsg->pszUxTradMsg != NULL);
	msg = (char*) pMsg->pszUxTradMsg;
	dbgprintf("logmsg: flags %x, from '%s', msg %s\n", flags, getRcvFrom(pMsg), msg);

	/* rger 2005-11-24 (happy thanksgiving!): we now need to check if we have
	 * a traditional syslog message or one formatted according to syslog-protocol.
	 * We need to apply different parsers depending on that. We use the
	 * -protocol VERSION field for the detection.
	 */
	if(msg[0] == '1' && msg[1] == ' ') {
		dbgprintf("Message has syslog-protocol format.\n");