kernel.git - Linux vanilla kernels for Fedora – https://fedoraproject.org/wiki/Kernel_Vanilla

path: root/configs/fedora/generic/CONFIG_AD7606_IFACE_PARALLEL

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configs/fedora/generic/CONFIG_AD7606_IFACE_PARALLEL

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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.
 *
 * Please note that as of now, a lot of the code in this file stems
 * from the sysklogd project. To learn more over this project, please
 * visit
 *
 * http://www.infodrom.org/projects/sysklogd/
 *
 * 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 I made quite some changes to the orignal package.
 * I expect to do even more changes - up
 * to a full rewrite - to meet my design goals, which among others
 * contain a (at least) dual-thread design with a memory buffer for
 * storing received bursts of data. This is also the reason why I 
 * kind of "forked" a completely new branch of the package. My intension
 * is to do many changes and only this initial release will look
 * similar to sysklogd (well, one never knows...).
 *
 * As I have made a lot of modifications, please assume that all bugs
 * in this package are mine and not those of the sysklogd team.
 *
 * As of this writing, there already exist heavy
 * modifications to the orginal sysklogd package. I suggest to no
 * longer rely too much on code knowledge you eventually have with
 * sysklogd - rgerhards 2005-07-05
 * The code is now almost completely different. Be careful!
 * rgerhards, 2006-11-30
 * 
 * I have decided to put my code under the GPL. The sysklog package
 * is distributed under the BSD license. As such, this package here
 * currently comes with two licenses. Both are given below. As it is
 * probably hard for you to see what was part of the sysklogd package
 * and what is part of my code, I suggest that you visit the 
 * sysklogd site on the URL above if you would like to base your
 * development on a version that is not under the GPL.
 *
 * 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 2003-2007 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 "config.h"
#include "rsyslog.h"

#ifdef __FreeBSD__
#define	BSD
#endif

/* 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
 *
 * I have removed syslogdPanic(). That function was supposed to be used
 * for logging in low-memory conditons. Ever since it was introduced, it
 * was a wrapper for dprintf(). A more intelligent choice was hard to
 * find. After all, if we are short on memory, doing anything fance will
 * again cause memory problems. I have now modified the code so that
 * those elements for which we do not get memory are simply discarded.
 * That might be a single property like the TAG, but it might also be
 * a complete message. The overall goal of this code change is to keep
 * rsyslogd up and running, while we sacrifice some messages to reach
 * that goal. It also keeps the code cleaner. A real out of memory
 * condition is highly unlikely. If it happens, there will probably be
 * much more trouble on the system in question. Anyhow - rsyslogd will
 * most probably be able to survive it and carry on with processing
 * once the situation has been resolved.
 */
#define DEFUPRI		(LOG_USER|LOG_NOTICE)
#define DEFSPRI		(LOG_KERN|LOG_CRIT)
#define TIMERINTVL	30		/* interval for checking flush, mark */

#define CONT_LINE	1		/* Allow continuation lines */

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

#include <sys/syslog.h>
#include <sys/param.h>
#ifdef	__sun
#include <errno.h>
#else
#include <sys/errno.h>
#endif
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/file.h>
#include <sys/un.h>
#include <sys/time.h>
#ifdef BSD
# include <sys/timespec.h>
#endif
#include <sys/resource.h>
#include <signal.h>

#include <netinet/in.h>
#include <netdb.h>
#include <fnmatch.h>
#include <dirent.h>

#ifndef __sun
#endif
#include <arpa/nameser.h>
#include <arpa/inet.h>
#include <resolv.h>
#include "pidfile.h"

#include <assert.h>

#ifdef USE_PTHREADS
#include <pthread.h>
#endif

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


/* handle some defines missing on more than one platform */
#ifndef SUN_LEN
#define SUN_LEN(su) \
   (sizeof(*(su)) - sizeof((su)->sun_path) + strlen((su)->sun_path))
#endif

#include "srUtils.h"
#include "stringbuf.h"
#include "syslogd-types.h"
#include "template.h"
#include "outchannel.h"
#include "syslogd.h"
#include "net.h" /* struct NetAddr */

#include "parse.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 "ommysql.h"
#include "omfwd.h"
#include "omfile.h"
#include "omdiscard.h"

/* 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	LOG_MAKEPRI(fac, pri)	(((fac) << 3) | (pri))
#define	LOG_PRI(p)	((p) & LOG_PRIMASK)
#define	LOG_FAC(p)	(((p) & LOG_FACMASK) >> 3)
#define INTERNAL_NOPRI  0x10    /* the "no priority" priority */
#define LOG_FTP         (11<<3) /* ftp daemon */
#define INTERNAL_MARK   LOG_MAKEPRI((LOG_NFACILITIES<<3), 0)

syslogCODE rs_prioritynames[] =
  {
    { "alert", LOG_ALERT },
    { "crit", LOG_CRIT },
    { "debug", LOG_DEBUG },
    { "emerg", LOG_EMERG },
    { "err", LOG_ERR },
    { "error", LOG_ERR },               /* DEPRECATED */
    { "info", LOG_INFO },
    { "none", INTERNAL_NOPRI },         /* INTERNAL */
    { "notice", LOG_NOTICE },
    { "panic", LOG_EMERG },             /* DEPRECATED */
    { "warn", LOG_WARNING },            /* DEPRECATED */
    { "warning", LOG_WARNING },
    { NULL, -1 }
  };

syslogCODE rs_facilitynames[] =
  {
    { "auth", LOG_AUTH },
    { "authpriv", LOG_AUTHPRIV },
    { "cron", LOG_CRON },
    { "daemon", LOG_DAEMON },
    { "ftp", LOG_FTP },
    { "kern", LOG_KERN },
    { "lpr", LOG_LPR },
    { "mail", LOG_MAIL },
    { "mark", INTERNAL_MARK },          /* INTERNAL */
    { "news", LOG_NEWS },
    { "security", LOG_AUTH },           /* DEPRECATED */
    { "syslog", LOG_SYSLOG },
    { "user", LOG_USER },
    { "uucp", LOG_UUCP },
    { "local0", LOG_LOCAL0 },
    { "local1", LOG_LOCAL1 },
    { "local2", LOG_LOCAL2 },
    { "local3", LOG_LOCAL3 },
    { "local4", LOG_LOCAL4 },
    { "local5", LOG_LOCAL5 },
    { "local6", LOG_LOCAL6 },
    { "local7", LOG_LOCAL7 },
    { NULL, -1 }
  };


#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

#if defined(SYSLOGD_PIDNAME)
#undef _PATH_LOGPID
#if defined(FSSTND)
#ifdef BSD
#define _PATH_VARRUN "/var/run/"
#endif
#ifdef __sun
#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(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

#ifndef _PATH_LOG
#ifdef BSD
#define _PATH_LOG	"/var/run/log"
#else
#define _PATH_LOG	"/dev/log"
#endif
#endif


/* IPv6 compatibility layer for older platforms
 * We need to handle a few things different if we are running
 * on an older platform which does not support all the glory
 * of IPv6. We try to limit toll on features and reliability,
 * but obviously it is better to run rsyslog on a platform that
 * supports everything...
 * rgerhards, 2007-06-22
 */
#ifndef AI_NUMERICSERV
#  define AI_NUMERICSERV 0
#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 */

int bModMySQLLoaded = 0; /* was a $ModLoad MySQL done? */
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 debugging_on = 0; /* read-only, except on sig USR1 */
static int restart = 0; /* do restart (config read) - multithread safe */

static int bRequestDoMark = 0; /* do mark processing? (multithread safe) */
#define MAXFUNIX	20

int glblHadMemShortage = 0; /* indicates if we had memory shortage some time during the run */
int startIndexUxLocalSockets = 0; /* process funix from that index on (used to 
 				   * suppress local logging. rgerhards 2005-08-01
				   * read-only after startup
				   */
int funixParseHost[MAXFUNIX] = { 0, }; /* should parser parse host name?  read-only after startup */
char *funixn[MAXFUNIX] = { _PATH_LOG }; /* read-only after startup */
int funix[MAXFUNIX] = { -1, }; /* read-only after startup */

#define INTERNAL_NOPRI	0x10	/* the "no priority" priority */
#define TABLE_NOPRI	0	/* Value to indicate no priority in f_pmask */
#define TABLE_ALLPRI    0xFF    /* Value to indicate all priorities in f_pmask */
#define	LOG_MARK	LOG_MAKEPRI(LOG_NFACILITIES, 0)	/* mark "facility" */

/* definitions used for doNameLine to differentiate between different command types
 * (with otherwise identical code). This is a left-over from the previous config
 * system. It stays, because it is still useful. So do not wonder why it looks
 * somewhat strange (at least its name). -- rgerhards, 2007-08-01
 */
enum eDirective { DIR_TEMPLATE = 0, DIR_OUTCHANNEL = 1, DIR_ALLOWEDSENDER = 2};

/* The following global variables are used for building
 * tag and host selector lines during startup and config reload.
 * This is stored as a global variable pool because of its ease. It is
 * also fairly compatible with multi-threading as the stratup code must
 * be run in a single thread anyways. So there can be no race conditions. These
 * variables are no longer used once the configuration has been loaded (except,
 * of course, during a reload). rgerhards 2005-10-18
 */
static EHostnameCmpMode eDfltHostnameCmpMode;
static rsCStrObj *pDfltHostnameCmp;
static rsCStrObj *pDfltProgNameCmp;

/* supporting structures for multithreading */
#ifdef USE_PTHREADS
/* this is the first approach to a queue, this time with static
 * memory.
 */
#define QUEUESIZE 10000
typedef struct {
	void* buf[QUEUESIZE];
	long head, tail;
	int full, empty;
	pthread_mutex_t *mut;
	pthread_cond_t *notFull, *notEmpty;
} msgQueue;

int bRunningMultithreaded = 0;	/* Is this program running in multithreaded mode? */
msgQueue *pMsgQueue = NULL;
static pthread_t thrdWorker;
static int bGlblDone = 0;
#endif
/* END supporting structures for multithreading */

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.
 */
int	repeatinterval[] = { 30, 60 };	/* # of secs before flush */
#define	MAXREPEAT ((int)((sizeof(repeatinterval) / sizeof(repeatinterval[0])) - 1))
#define	REPEATTIME(f)	((f)->f_time + repeatinterval[(f)->f_repeatcount])
#define	BACKOFF(f)	{ if (++(f)->f_repeatcount > MAXREPEAT) \
				 (f)->f_repeatcount = MAXREPEAT; \
			}
#ifdef SYSLOG_INET
union sockunion {
	struct sockinet {
		u_char si_len;
		u_char si_family;
		} su_si;
	struct sockaddr_in  su_sin;
	struct sockaddr_in6 su_sin6;
};
#endif

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

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

struct code {
	char	*c_name;
	int	c_val;
};

static struct code	PriNames[] = {
	{"alert",	LOG_ALERT},
	{"crit",	LOG_CRIT},
	{"debug",	LOG_DEBUG},
	{"emerg",	LOG_EMERG},
	{"err",		LOG_ERR},
	{"error",	LOG_ERR},		/* DEPRECATED */
	{"info",	LOG_INFO},
	{"none",	INTERNAL_NOPRI},	/* INTERNAL */
	{"notice",	LOG_NOTICE},
	{"panic",	LOG_EMERG},		/* DEPRECATED */
	{"warn",	LOG_WARNING},		/* DEPRECATED */
	{"warning",	LOG_WARNING},
	{"*",		TABLE_ALLPRI},
	{NULL,		-1}
};

static struct code	FacNames[] = {
	{"auth",         LOG_AUTH},
	{"authpriv",     LOG_AUTHPRIV},
	{"cron",         LOG_CRON},
	{"daemon",       LOG_DAEMON},
	{"kern",         LOG_KERN},
	{"lpr",          LOG_LPR},
	{"mail",         LOG_MAIL},
	{"mark",         LOG_MARK},		/* INTERNAL */
	{"news",         LOG_NEWS},
	{"security",     LOG_AUTH},		/* DEPRECATED */
	{"syslog",       LOG_SYSLOG},
	{"user",         LOG_USER},
	{"uucp",         LOG_UUCP},
#if defined(LOG_FTP)
	{"ftp",          LOG_FTP},
#endif
	{"local0",       LOG_LOCAL0},
	{"local1",       LOG_LOCAL1},
	{"local2",       LOG_LOCAL2},
	{"local3",       LOG_LOCAL3},
	{"local4",       LOG_LOCAL4},
	{"local5",       LOG_LOCAL5},
	{"local6",       LOG_LOCAL6},
	{"local7",       LOG_LOCAL7},
	{NULL,           -1},
};

/* global variables for config file state */
static int	bDropTrailingLF = 1; /* drop trailing LF's on reception? */
int	Debug;		/* debug flag  - read-only after startup */
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; /* escape control characters on reception: 0 - no, 1 - yes */
static int 	bReduceRepeatMsgs; /* reduce repeated message - 0 - no, 1 - yes */
static 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
				 */
/* end global config file state variables */

static unsigned int Forwarding = 0;
static int nfunix = 1; /* number of Unix sockets open / read-only after startup */
char	LocalHostName[MAXHOSTNAMELEN+1];/* our hostname  - read-only after startup */
char	*LocalDomain;	/* our local domain name  - read-only after startup */
int	*finet = NULL;	/* Internet datagram sockets, first element is nbr of elements
				 * read-only after init(), but beware of restart! */
static char     *LogPort = "514";    /* port number for INET connections */
static 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	MarkSeq = 0;	/* mark sequence number - modified in domark() only */
static int	NoFork = 0; 	/* don't fork - don't run in daemon mode - read-only after startup */
static int	AcceptRemote = 0;/* receive messages that come via UDP - 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.*/
char	**LocalHosts = NULL;/* these hosts are logged with their hostname  - read-only after startup*/
int	NoHops = 1;	/* Can we bounce syslog messages through an
				   intermediate host.  Read-only after startup */
static int     Initialized = 0; /* set when we have initialized ourselves
                                 * rgerhards 2004-11-09: and by initialized, we mean that
                                 * the configuration file could be properly read AND the
                                 * syslog/udp port could be obtained (the later is debatable).
                                 * It is mainly a setting used for emergency logging: if
                                 * something really goes wild, we can not do as indicated in
                                 * the log file, but we still log messages to the system
                                 * console. This is probably the best that can be done in
                                 * such a case.
				 * read-only after startup, but modified during restart
                                 */

extern	int errno;


/* This structure represents the files that will have log
 * copies printed.
 * RGerhards 2004-11-08: Each instance of the filed structure 
 * describes what I call an "output channel". This is important
 * to mention as we now allow database connections to be
 * present in the filed structure. If helps immensely, if we
 * think of it as the abstraction of an output channel.
 * rgerhards, 2005-10-26: The structure below provides ample
 * opportunity for non-thread-safety. Each of the variable
 * accesses must be carefully evaluated, many of them probably
 * be guarded by mutexes. But beware of deadlocks...
 * rgerhards, 2007-08-01: as you can see, the structure has shrunk pretty much. I will
 * remove some of the comments some time. It's still the structure that controls much
 * of the processing that goes on in syslogd, but it now has lots of helpers.
 */
struct filed {
	struct	filed *f_next;		/* next in linked list */
	/* filter properties */
	enum {
		FILTER_PRI = 0,		/* traditional PRI based filer */
		FILTER_PROP = 1		/* extended filter, property based */
	} f_filter_type;
	EHostnameCmpMode eHostnameCmpMode;
	rsCStrObj *pCSHostnameComp;	/* hostname to check */
	rsCStrObj *pCSProgNameComp;	/* tag to check or NULL, if not to be checked */
	union {
		u_char	f_pmask[LOG_NFACILITIES+1];	/* priority mask */
		struct {
			rsCStrObj *pCSPropName;
			enum {
				FIOP_NOP = 0,		/* do not use - No Operation */
				FIOP_CONTAINS  = 1,	/* contains string? */
				FIOP_ISEQUAL  = 2,	/* is (exactly) equal? */
				FIOP_STARTSWITH = 3,	/* starts with a string? */
 				FIOP_REGEX = 4		/* matches a regular expression? */
			} operation;
			rsCStrObj *pCSCompValue;	/* value to "compare" against */
			char isNegated;			/* actually a boolean ;) */
		} prop;
	} f_filterData;

	linkedList_t llActList;	/* list of configured actions */
};
typedef struct filed selector_t;	/* new type name */


/* 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;

	return RS_RET_OK;
}


/* support for defining allowed TCP and UDP senders. We use the same
 * structure to implement this (a linked list), but we define two different
 * list roots, one for UDP and one for TCP.
 * rgerhards, 2005-09-26
 */
#ifdef SYSLOG_INET
/* All of the five below are read-only after startup */
static struct AllowedSenders *pAllowedSenders_UDP = NULL; /* the roots of the allowed sender */
struct AllowedSenders *pAllowedSenders_TCP = NULL; /* lists. If NULL, all senders are ok! */
static struct AllowedSenders *pLastAllowedSenders_UDP = NULL; /* and now the pointers to the last */
static struct AllowedSenders *pLastAllowedSenders_TCP = NULL; /* element in the respective list */
#endif /* #ifdef SYSLOG_INET */

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";
/* end template */


/* up to the next comment, prototypes that should be removed by reordering */
#ifdef USE_PTHREADS
static msgQueue *queueInit (void);
static void *singleWorker(); /* REMOVEME later 2005-10-24 */
#endif
/* Function prototypes. */
static char **crunch_list(char *list);
static void printline(char *hname, char *msg, int iSource);
static void logmsg(int pri, msg_t*, int flags);
static rsRetVal fprintlog(action_t *pAction);
static void reapchild();
static void debug_switch();
static rsRetVal cfline(uchar *line, selector_t **pfCurr);
static int decode(uchar *name, struct code *codetab);
static void sighup_handler();
static void die(int sig);
static void freeSelectors(void);
static rsRetVal processConfFile(uchar *pConfFile);
static rsRetVal selectorAddList(selector_t *f);
static void processImInternal(void);

/* Access functions for the selector_t. These functions are primarily
 * necessary to make things thread-safe. Consequently, they are slim
 * if we compile without pthread support.
 * rgerhards 2005-10-24
 */

/* END Access functions for the selector_t */

/* Code for handling allowed/disallowed senders
 */
#ifdef SYSLOG_INET
static inline void MaskIP6 (struct in6_addr *addr, uint8_t bits) {
	register uint8_t i;
	
	assert (addr != NULL);
	assert (bits <= 128);
	
	i = bits/32;
	if (bits%32)
		addr->s6_addr32[i++] &= htonl(0xffffffff << (32 - (bits % 32)));
	for (; i < (sizeof addr->s6_addr32)/4; i++)
		addr->s6_addr32[i] = 0;
}

static inline void MaskIP4 (struct in_addr  *addr, uint8_t bits) {
	
	assert (addr != NULL);
	assert (bits <=32 );
	
	addr->s_addr &= htonl(0xffffffff << (32 - bits));
}

#define SIN(sa)  ((struct sockaddr_in  *)(sa))
#define SIN6(sa) ((struct sockaddr_in6 *)(sa))

/* This function adds an allowed sender entry to the ACL linked list.
 * In any case, a single entry is added. If an error occurs, the
 * function does its error reporting itself. All validity checks
 * must already have been done by the caller.
 * This is a helper to AddAllowedSender().
 * rgerhards, 2007-07-17
 */
static rsRetVal AddAllowedSenderEntry(struct AllowedSenders **ppRoot, struct AllowedSenders **ppLast,
		     		      struct NetAddr *iAllow, uint8_t iSignificantBits)
{
	struct AllowedSenders *pEntry = NULL;

	assert(ppRoot != NULL);
	assert(ppLast != NULL);
	assert(iAllow != NULL);

	if((pEntry = (struct AllowedSenders*) calloc(1, sizeof(struct AllowedSenders))) == NULL) {
		glblHadMemShortage = 1;
		return RS_RET_OUT_OF_MEMORY; /* no options left :( */
	}
	
	memcpy(&(pEntry->allowedSender), iAllow, sizeof (struct NetAddr));
	pEntry->pNext = NULL;
	pEntry->SignificantBits = iSignificantBits;
	
	/* enqueue */
	if(*ppRoot == NULL) {
		*ppRoot = pEntry;
	} else {
		(*ppLast)->pNext = pEntry;
	}
	*ppLast = pEntry;
	
	return RS_RET_OK;
}

/* function to clear the allowed sender structure in cases where
 * it must be freed (occurs most often when HUPed.
 * TODO: reconsider recursive implementation
 */
static void clearAllowedSenders (struct AllowedSenders *pAllow) {
	if (pAllow != NULL) {
		if (pAllow->pNext != NULL)
			clearAllowedSenders (pAllow->pNext);
		else {
			if (F_ISSET(pAllow->allowedSender.flags, ADDR_NAME))
				free (pAllow->allowedSender.addr.HostWildcard);
			else
				free (pAllow->allowedSender.addr.NetAddr);
			
			free (pAllow);
		}
	}
}

/* function to add an allowed sender to the allowed sender list. The
 * root of the list is caller-provided, so it can be used for all
 * supported lists. The caller must provide a pointer to the root,
 * as it eventually needs to be updated. Also, a pointer to the
 * pointer to the last element must be provided (to speed up adding
 * list elements).
 * rgerhards, 2005-09-26
 * If a hostname is given there are possible multiple entries
 * added (all addresses from that host).
 */
static rsRetVal AddAllowedSender(struct AllowedSenders **ppRoot, struct AllowedSenders **ppLast,
		     		 struct NetAddr *iAllow, uint8_t iSignificantBits)
{
	DEFiRet;

	assert(ppRoot != NULL);
	assert(ppLast != NULL);
	assert(iAllow != NULL);

	if (!F_ISSET(iAllow->flags, ADDR_NAME)) {
		if(iSignificantBits == 0)
			/* we handle this seperatly just to provide a better
			 * error message.
			 */
			logerror("You can not specify 0 bits of the netmask, this would "
				 "match ALL systems. If you really intend to do that, "
				 "remove all $AllowedSender directives.");
		
		switch (iAllow->addr.NetAddr->sa_family) {
		case AF_INET:
			if((iSignificantBits < 1) || (iSignificantBits > 32)) {
				logerrorInt("Invalid bit number in IPv4 address - adjusted to 32",
					    (int)iSignificantBits);
				iSignificantBits = 32;
			}
			
			MaskIP4 (&(SIN(iAllow->addr.NetAddr)->sin_addr), iSignificantBits);
			break;
		case AF_INET6:
			if((iSignificantBits < 1) || (iSignificantBits > 128)) {
				logerrorInt("Invalid bit number in IPv6 address - adjusted to 128",
					    iSignificantBits);
				iSignificantBits = 128;
			}

			MaskIP6 (&(SIN6(iAllow->addr.NetAddr)->sin6_addr), iSignificantBits);
			break;
		default:
			/* rgerhards, 2007-07-16: We have an internal program error in this
			 * case. However, there is not much we can do against it right now. Of
			 * course, we could abort, but that would probably cause more harm
			 * than good. So we continue to run. We simply do not add this line - the
			 * worst thing that happens is that one host will not be allowed to
			 * log.
			 */
			logerrorInt("Internal error caused AllowedSender to be ignored, AF = %d",
				    iAllow->addr.NetAddr->sa_family);
			return RS_RET_ERR;
		}
		/* OK, entry constructed, now lets add it to the ACL list */
		iRet = AddAllowedSenderEntry(ppRoot, ppLast, iAllow, iSignificantBits);
	} else {
		/* we need to process a hostname ACL */
		if (DisableDNS) {
			logerror ("Ignoring hostname based ACLs because DNS is disabled.");
			return RS_RET_OK;
		}
		
		if (!strchr (iAllow->addr.HostWildcard, '*') &&
		    !strchr (iAllow->addr.HostWildcard, '?')) {
			/* single host - in this case, we pull its IP addresses from DNS
			* and add IP-based ACLs.
			*/
			struct addrinfo hints, *res, *restmp;
			struct NetAddr allowIP;
			
			memset (&hints, 0, sizeof (struct addrinfo));
			hints.ai_family = AF_UNSPEC;
			hints.ai_flags  = AI_ADDRCONFIG;
			hints.ai_socktype = SOCK_DGRAM;

			if (getaddrinfo (iAllow->addr.HostWildcard, NULL, &hints, &res) != 0) {
				logerrorSz("DNS error: Can't resolve \"%s\", not added as allowed sender", iAllow->addr.HostWildcard);
				/* We could use the text name in this case - maybe this could become
				 * a user-defined option at some stage.
				 */
				return RS_RET_ERR;
			}
			
			for (restmp = res ; res != NULL ; res = res->ai_next) {
				switch (res->ai_family) {
				case AF_INET: /* add IPv4 */
					iSignificantBits = 32;
					allowIP.flags = 0;
					if((allowIP.addr.NetAddr = malloc(res->ai_addrlen)) == NULL) {
						glblHadMemShortage = 1;
						return RS_RET_OUT_OF_MEMORY;
					}
					memcpy(allowIP.addr.NetAddr, res->ai_addr, res->ai_addrlen);
					
					if((iRet = AddAllowedSenderEntry(ppRoot, ppLast, &allowIP, iSignificantBits))
						!= RS_RET_OK)
						return(iRet);
					break;
				case AF_INET6: /* IPv6 - but need to check if it is a v6-mapped IPv4 */
					if(IN6_IS_ADDR_V4MAPPED (&SIN6(res->ai_addr)->sin6_addr)) {
						/* extract & add IPv4 */
						
						iSignificantBits = 32;
						allowIP.flags = 0;
						if((allowIP.addr.NetAddr = malloc(sizeof(struct sockaddr_in)))
						    == NULL) {
							glblHadMemShortage = 1;
							return RS_RET_OUT_OF_MEMORY;
						}
						SIN(allowIP.addr.NetAddr)->sin_family = AF_INET;
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN    
                                                SIN(allowIP.addr.NetAddr)->sin_len    = sizeof (struct sockaddr_in);
#endif
						SIN(allowIP.addr.NetAddr)->sin_port   = 0;
						memcpy(&(SIN(allowIP.addr.NetAddr)->sin_addr.s_addr),
							&(SIN6(res->ai_addr)->sin6_addr.s6_addr32[3]),
							sizeof (struct sockaddr_in));

						if((iRet = AddAllowedSenderEntry(ppRoot, ppLast, &allowIP,
								iSignificantBits))
							!= RS_RET_OK)
							return(iRet);
					} else {
						/* finally add IPv6 */
						
						iSignificantBits = 128;
						allowIP.flags = 0;
						if((allowIP.addr.NetAddr = malloc(res->ai_addrlen)) == NULL) {
							glblHadMemShortage = 1;
							return RS_RET_OUT_OF_MEMORY;
						}
						memcpy(allowIP.addr.NetAddr, res->ai_addr, res->ai_addrlen);
						
						if((iRet = AddAllowedSenderEntry(ppRoot, ppLast, &allowIP,
								iSignificantBits))
							!= RS_RET_OK)
							return(iRet);
					}
					break;
				}
			}
			freeaddrinfo (restmp);
		} else {
			/* wildcards in hostname - we need to add a text-based ACL.
			 * For this, we already have everything ready and just need
			 * to pass it along...
			 */
			iRet =  AddAllowedSenderEntry(ppRoot, ppLast, iAllow, iSignificantBits);
		}
	}

	return iRet;
}
#endif /* #ifdef SYSLOG_INET */


#ifdef SYSLOG_INET
/* Print an allowed sender list. The caller must tell us which one.
 * iListToPrint = 1 means UDP, 2 means TCP
 * rgerhards, 2005-09-27
 */
static void PrintAllowedSenders(int iListToPrint)
{
	struct AllowedSenders *pSender;
	uchar szIP[64];
	
	assert((iListToPrint == 1) || (iListToPrint == 2));

	printf("\nAllowed %s Senders:\n",
	       (iListToPrint == 1) ? "UDP" : "TCP");
	pSender = (iListToPrint == 1) ?
		  pAllowedSenders_UDP : pAllowedSenders_TCP;
	if(pSender == NULL) {
		printf("\tNo restrictions set.\n");
	} else {
		while(pSender != NULL) {
			if (F_ISSET(pSender->allowedSender.flags, ADDR_NAME))
				printf ("\t%s\n", pSender->allowedSender.addr.HostWildcard);
			else {
				if(getnameinfo (pSender->allowedSender.addr.NetAddr,
						     SALEN(pSender->allowedSender.addr.NetAddr),
						     (char*)szIP, 64, NULL, 0, NI_NUMERICHOST) == 0) {
					printf ("\t%s/%u\n", szIP, pSender->SignificantBits);
				} else {
					/* getnameinfo() failed - but as this is only a
					 * debug function, we simply spit out an error and do
					 * not care much about it.
					 */
					dprintf("\tERROR in getnameinfo() - something may be wrong "
						"- ignored for now\n");
				}
			}
			pSender = pSender->pNext;
		}
	}
}


/* compares a host to an allowed sender list entry. Handles all subleties
 * including IPv4/v6 as well as domain name wildcards.
 * This is a helper to isAllowedSender. As it is only called once, it is
 * declared inline.
 * Returns 0 if they do not match, something else otherwise.
 * contributed 1007-07-16 by mildew@gmail.com
 */
static inline int MaskCmp(struct NetAddr *pAllow, uint8_t bits, struct sockaddr *pFrom, const char *pszFromHost)
{
	assert(pAllow != NULL);
	assert(pFrom != NULL);

	if(F_ISSET(pAllow->flags, ADDR_NAME)) {
		dprintf ("MaskCmp: host=\"%s\"; pattern=\"%s\"\n", pszFromHost, pAllow->addr.HostWildcard);
		
		return(fnmatch(pAllow->addr.HostWildcard, pszFromHost, FNM_NOESCAPE|FNM_CASEFOLD) == 0);
	} else {/* We need to compare an IP address */
		switch (pFrom->sa_family) {
		case AF_INET:
			if (AF_INET == pAllow->addr.NetAddr->sa_family)
				return(( SIN(pFrom)->sin_addr.s_addr & htonl(0xffffffff << (32 - bits)) )
				       == SIN(pAllow->addr.NetAddr)->sin_addr.s_addr);
			else
				return 0;
			break;
		case AF_INET6:
			switch (pAllow->addr.NetAddr->sa_family) {
			case AF_INET6: {
				struct in6_addr ip, net;
				register uint8_t i;
				
				memcpy (&ip,  &(SIN6(pFrom))->sin6_addr, sizeof (struct in6_addr));
				memcpy (&net, &(SIN6(pAllow->addr.NetAddr))->sin6_addr, sizeof (struct in6_addr));
				
				i = bits/32;
				if (bits % 32)
					ip.s6_addr32[i++] &= htonl(0xffffffff << (32 - (bits % 32)));
				for (; i < (sizeof ip.s6_addr32)/4; i++)
					ip.s6_addr32[i] = 0;
				
				return (memcmp (ip.s6_addr, net.s6_addr, sizeof ip.s6_addr) == 0 &&
					(SIN6(pAllow->addr.NetAddr)->sin6_scope_id != 0 ?
					 SIN6(pFrom)->sin6_scope_id == SIN6(pAllow->addr.NetAddr)->sin6_scope_id : 1));
			}
			case AF_INET: {
				struct in6_addr *ip6 = &(SIN6(pFrom))->sin6_addr;
				struct in_addr  *net = &(SIN(pAllow->addr.NetAddr))->sin_addr;
				
				if ((ip6->s6_addr32[3] & (u_int32_t) htonl((0xffffffff << (32 - bits)))) == net->s_addr &&
#if BYTE_ORDER == LITTLE_ENDIAN
				    (ip6->s6_addr32[2] == (u_int32_t)0xffff0000) &&
#else
				    (ip6->s6_addr32[2] == (u_int32_t)0x0000ffff) &&
#endif
				    (ip6->s6_addr32[1] == 0) && (ip6->s6_addr32[0] == 0))
					return 1;
				else
					return 0;
			}
			default:
				/* Unsupported AF */
				return 0;
			}
		default:
			/* Unsupported AF */
			return 0;
		}
	}
}


/* check if a sender is allowed. The root of the the allowed sender.
 * list must be proveded by the caller. As such, this function can be
 * used to check both UDP and TCP allowed sender lists.
 * returns 1, if the sender is allowed, 0 otherwise.
 * rgerhards, 2005-09-26
 */
int isAllowedSender(struct AllowedSenders *pAllowRoot, struct sockaddr *pFrom, const char *pszFromHost)
{
	struct AllowedSenders *pAllow;
	
	assert(pFrom != NULL);

	if(pAllowRoot == NULL)
		return 1; /* checking disabled, everything is valid! */
	
	/* now we loop through the list of allowed senders. As soon as
	 * we find a match, we return back (indicating allowed). We loop
	 * until we are out of allowed senders. If so, we fall through the
	 * loop and the function's terminal return statement will indicate
	 * that the sender is disallowed.
	 */
	for(pAllow = pAllowRoot ; pAllow != NULL ; pAllow = pAllow->pNext) {
		if (MaskCmp (&(pAllow->allowedSender), pAllow->SignificantBits, pFrom, pszFromHost))
			return 1;
	}
	dprintf("%s is not an allowed sender\n", pszFromHost);
	return 0;
}
#endif /* #ifdef SYSLOG_INET */


/* code to free all sockets within a socket table.
 * A socket table is a descriptor table where the zero
 * element has the count of elements. This is used for
 * listening sockets. The socket table itself is also
 * freed.
 * A POINTER to this structure must be provided, thus
 * double indirection!
 * rgerhards, 2007-06-28
 */
void freeAllSockets(int **socks)
{
	assert(socks != NULL);
	assert(*socks != NULL);
	while(**socks) {
		dprintf("Closing socket %d.\n", (*socks)[**socks]);
		close((*socks)[**socks]);
		(**socks)--;
	}
	free(*socks);
	socks = NULL;
}




/*******************************************************************
 * BEGIN CODE-LIBLOGGING                                           *
 *******************************************************************
 * Code in this section is borrowed from liblogging. This is an
 * interim solution. Once liblogging is fully integrated, this is
 * to be removed (see http://www.monitorware.com/liblogging for
 * more details. 2004-11-16 rgerhards
 *
 * Please note that the orginal liblogging code is modified so that
 * it fits into the context of the current version of syslogd.c.
 *
 * DO NOT PUT ANY OTHER CODE IN THIS BEGIN ... END BLOCK!!!!
 */

/**
 * Parse a 32 bit integer number from a string.
 *
 * \param ppsz Pointer to the Pointer to the string being parsed. It
 *             must be positioned at the first digit. Will be updated 
 *             so that on return it points to the first character AFTER
 *             the integer parsed.
 * \retval The number parsed.
 */

static int srSLMGParseInt32(char** ppsz)
{
	int i;

	i = 0;
	while(isdigit((int) **ppsz))
	{
		i = i * 10 + **ppsz - '0';
		++(*ppsz);
	}

	return i;
}


/**
 * Parse a TIMESTAMP-3339.
 * updates the parse pointer position.
 */
static int srSLMGParseTIMESTAMP3339(struct syslogTime *pTime, char** ppszTS)
{
	char *pszTS = *ppszTS;

	assert(pTime != NULL);
	assert(ppszTS != NULL);
	assert(pszTS != NULL);

	pTime->year = srSLMGParseInt32(&pszTS);

	/* We take the liberty to accept slightly malformed timestamps e.g. in 
	 * the format of 2003-9-1T1:0:0. This doesn't hurt on receiving. Of course,
	 * with the current state of affairs, we would never run into this code
	 * here because at postion 11, there is no "T" in such cases ;)
	 */
	if(*pszTS++ != '-')
		return FALSE;
	pTime->month = srSLMGParseInt32(&pszTS);
	if(pTime->month < 1 || pTime->month > 12)
		return FALSE;

	if(*pszTS++ != '-')
		return FALSE;
	pTime->day = srSLMGParseInt32(&pszTS);
	if(pTime->day < 1 || pTime->day > 31)
		return FALSE;

	if(*pszTS++ != 'T')
		return FALSE;

	pTime->hour = srSLMGParseInt32(&pszTS);
	if(pTime->hour < 0 || pTime->hour > 23)
		return FALSE;

	if(*pszTS++ != ':')
		return FALSE;
	pTime->minute = srSLMGParseInt32(&pszTS);
	if(pTime->minute < 0 || pTime->minute > 59)
		return FALSE;

	if(*pszTS++ != ':')
		return FALSE;
	pTime->second = srSLMGParseInt32(&pszTS);
	if(pTime->second < 0 || pTime->second > 60)
		return FALSE;

	/* Now let's see if we have secfrac */
	if(*pszTS == '.')
	{
		char *pszStart = ++pszTS;
		pTime->secfrac = srSLMGParseInt32(&pszTS);
		pTime->secfracPrecision = (int) (pszTS - pszStart);
	}
	else
	{
		pTime->secfracPrecision = 0;
		pTime->secfrac = 0;
	}

	/* check the timezone */
	if(*pszTS == 'Z')
	{
		pszTS++; /* eat Z */
		pTime->OffsetMode = 'Z';
		pTime->OffsetHour = 0;
		pTime->OffsetMinute = 0;
	}
	else if((*pszTS == '+') || (*pszTS == '-'))
	{
		pTime->OffsetMode = *pszTS;
		pszTS++;

		pTime->OffsetHour = srSLMGParseInt32(&pszTS);
		if(pTime->OffsetHour < 0 || pTime->OffsetHour > 23)
			return FALSE;

		if(*pszTS++ != ':')
			return FALSE;
		pTime->OffsetMinute = srSLMGParseInt32(&pszTS);
		if(pTime->OffsetMinute < 0 || pTime->OffsetMinute > 59)
			return FALSE;
	}
	else
		/* there MUST be TZ information */
		return FALSE;

	/* OK, we actually have a 3339 timestamp, so let's indicated this */
	if(*pszTS == ' ')
		++pszTS;
	else
		return FALSE;

	/* update parse pointer */
	*ppszTS = pszTS;

	return TRUE;
}


/**
 * Parse a TIMESTAMP-3164.
 * Returns TRUE on parse OK, FALSE on parse error.
 */
static int srSLMGParseTIMESTAMP3164(struct syslogTime *pTime, char* pszTS)
{
	assert(pTime != NULL);
	assert(pszTS != NULL);

	getCurrTime(pTime);	/* obtain the current year and UTC offsets! */

	/* If we look at the month (Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec),
	 * we may see the following character sequences occur:
	 *
	 * J(an/u(n/l)), Feb, Ma(r/y), A(pr/ug), Sep, Oct, Nov, Dec
	 *
	 * We will use this for parsing, as it probably is the
	 * fastest way to parse it.
	 *
	 * 2005-07-18, well sometimes it pays to be a bit more verbose, even in C...
	 * Fixed a bug that lead to invalid detection of the data. The issue was that
	 * we had an if(++pszTS == 'x') inside of some of the consturcts below. However,
	 * there were also some elseifs (doing the same ++), which than obviously did not
	 * check the orginal character but the next one. Now removed the ++ and put it
	 * into the statements below. Was a really nasty bug... I didn't detect it before
	 * june, when it first manifested. This also lead to invalid parsing of the rest
	 * of the message, as the time stamp was not detected to be correct. - rgerhards
	 */
	switch(*pszTS++)
	{
	case 'J':
		if(*pszTS == 'a') {
			++pszTS;
			if(*pszTS == 'n') {
				++pszTS;
				pTime->month = 1;
			} else
				return FALSE;
		} else if(*pszTS == 'u') {
			++pszTS;
			if(*pszTS == 'n') {
				++pszTS;
				pTime->month = 6;
			} else if(*pszTS == 'l') {
				++pszTS;
				pTime->month = 7;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'F':
		if(*pszTS == 'e') {
			++pszTS;
			if(*pszTS == 'b') {
				++pszTS;
				pTime->month = 2;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'M':
		if(*pszTS == 'a') {
			++pszTS;
			if(*pszTS == 'r') {
				++pszTS;
				pTime->month = 3;
			} else if(*pszTS == 'y') {
				++pszTS;
				pTime->month = 5;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'A':
		if(*pszTS == 'p') {
			++pszTS;
			if(*pszTS == 'r') {
				++pszTS;
				pTime->month = 4;
			} else
				return FALSE;
		} else if(*pszTS == 'u') {
			++pszTS;
			if(*pszTS == 'g') {
				++pszTS;
				pTime->month = 8;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'S':
		if(*pszTS == 'e') {
			++pszTS;
			if(*pszTS == 'p') {
				++pszTS;
				pTime->month = 9;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'O':
		if(*pszTS == 'c') {
			++pszTS;
			if(*pszTS == 't') {
				++pszTS;
				pTime->month = 10;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'N':
		if(*pszTS == 'o') {
			++pszTS;
			if(*pszTS == 'v') {
				++pszTS;
				pTime->month = 11;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	case 'D':
		if(*pszTS == 'e') {
			++pszTS;
			if(*pszTS == 'c') {
				++pszTS;
				pTime->month = 12;
			} else
				return FALSE;
		} else
			return FALSE;
		break;
	default:
		return FALSE;
	}

	/* done month */

	if(*pszTS++ != ' ')
		return FALSE;

	/* we accept a slightly malformed timestamp when receiving. This is
	 * we accept one-digit days
	 */
	if(*pszTS == ' ')
		++pszTS;

	pTime->day = srSLMGParseInt32(&pszTS);
	if(pTime->day < 1 || pTime->day > 31)
		return FALSE;

	if(*pszTS++ != ' ')
		return FALSE;
	pTime->hour = srSLMGParseInt32(&pszTS);
	if(pTime->hour < 0 || pTime->hour > 23)
		return FALSE;

	if(*pszTS++ != ':')
		return FALSE;
	pTime->minute = srSLMGParseInt32(&pszTS);
	if(pTime->minute < 0 || pTime->minute > 59)
		return FALSE;

	if(*pszTS++ != ':')
		return FALSE;
	pTime->second = srSLMGParseInt32(&pszTS);
	if(pTime->second < 0 || pTime->second > 60)
		return FALSE;
	if(*pszTS++ != ':')

	/* OK, we actually have a 3164 timestamp, so let's indicate this
	 * and fill the rest of the properties. */
	pTime->timeType = 1;
 	pTime->secfracPrecision = 0;
	pTime->secfrac = 0;
	return TRUE;
}

/*******************************************************************
 * END CODE-LIBLOGGING                                             *
 *******************************************************************/

/**
 * Format a syslogTimestamp into format required by MySQL.
 * We are using the 14 digits format. For example 20041111122600 
 * is interpreted as '2004-11-11 12:26:00'. 
 * The caller must provide the timestamp as well as a character
 * buffer that will receive the resulting string. The function
 * returns the size of the timestamp written in bytes (without
 * the string terminator). If 0 is returend, an error occured.
 */
int formatTimestampToMySQL(struct syslogTime *ts, char* pDst, size_t iLenDst)
{
	/* currently we do not consider localtime/utc. This may later be
	 * added. If so, I recommend using a property replacer option
	 * and/or a global configuration option. However, we should wait
	 * on user requests for this feature before doing anything.
	 * rgerhards, 2007-06-26
	 */
	assert(ts != NULL);
	assert(pDst != NULL);

	if (iLenDst < 15) /* we need at least 14 bytes
			     14 digits for timestamp + '\n' */
		return(0); 

	return(snprintf(pDst, iLenDst, "%4.4d%2.2d%2.2d%2.2d%2.2d%2.2d", 
		ts->year, ts->month, ts->day, ts->hour, ts->minute, ts->second));

}

/**
 * Format a syslogTimestamp to a RFC3339 timestamp string (as
 * specified in syslog-protocol).
 * The caller must provide the timestamp as well as a character
 * buffer that will receive the resulting string. The function
 * returns the size of the timestamp written in bytes (without
 * the string terminator). If 0 is returend, an error occured.
 */
int formatTimestamp3339(struct syslogTime *ts, char* pBuf, size_t iLenBuf)
{
	int iRet;
	char szTZ[7]; /* buffer for TZ information */

	assert(ts != NULL);
	assert(pBuf != NULL);
	
	if(iLenBuf < 20)
		return(0); /* we NEED at least 20 bytes */

	/* do TZ information first, this is easier to take care of "Z" zone in rfc3339 */
	if(ts->OffsetMode == 'Z') {
		szTZ[0] = 'Z';
		szTZ[1] = '\0';
	} else {
		snprintf(szTZ, sizeof(szTZ) / sizeof(char), "%c%2.2d:%2.2d",
			ts->OffsetMode, ts->OffsetHour, ts->OffsetMinute);
	}

	if(ts->secfracPrecision > 0)
	{	/* we now need to include fractional seconds. While doing so, we must look at
		 * the precision specified. For example, if we have millisec precision (3 digits), a
		 * secFrac value of 12 is not equivalent to ".12" but ".012". Obviously, this
		 * is a huge difference ;). To avoid this, we first create a format string with
		 * the specific precision and *then* use that format string to do the actual
		 * formating (mmmmhhh... kind of self-modifying code... ;)).
		 */
		char szFmtStr[64];
		/* be careful: there is ONE actual %d in the format string below ;) */
		snprintf(szFmtStr, sizeof(szFmtStr),
		         "%%04d-%%02d-%%02dT%%02d:%%02d:%%02d.%%0%dd%%s",
			ts->secfracPrecision);
		iRet = snprintf(pBuf, iLenBuf, szFmtStr, ts->year, ts->month, ts->day,
			        ts->hour, ts->minute, ts->second, ts->secfrac, szTZ);
	}
	else
		iRet = snprintf(pBuf, iLenBuf,
		 		"%4.4d-%2.2d-%2.2dT%2.2d:%2.2d:%2.2d%s",
				ts->year, ts->month, ts->day,
			        ts->hour, ts->minute, ts->second, szTZ);
	return(iRet);
}

/**
 * Format a syslogTimestamp to a RFC3164 timestamp sring.
 * The caller must provide the timestamp as well as a character
 * buffer that will receive the resulting string. The function
 * returns the size of the timestamp written in bytes (without
 * the string termnator). If 0 is returend, an error occured.
 */
int formatTimestamp3164(struct syslogTime *ts, char* pBuf, size_t iLenBuf)
{
	static char* monthNames[13] = {"ERR", "Jan", "Feb", "Mar",
	                               "Apr", "May", "Jun", "Jul",
				       "Aug", "Sep", "Oct", "Nov", "Dec"};
	assert(ts != NULL);
	assert(pBuf != NULL);
	
	if(iLenBuf < 16)
		return(0); /* we NEED 16 bytes */
	return(snprintf(pBuf, iLenBuf, "%s %2d %2.2d:%2.2d:%2.2d",
		monthNames[ts->month], ts->day, ts->hour,
		ts->minute, ts->second
		));
}

/**
 * Format a syslogTimestamp to a text format.
 * The caller must provide the timestamp as well as a character
 * buffer that will receive the resulting string. The function
 * returns the size of the timestamp written in bytes (without
 * the string termnator). If 0 is returend, an error occured.
 */
#if 0 /* This method is currently not called, be we like to preserve it */
static int formatTimestamp(struct syslogTime *ts, char* pBuf, size_t iLenBuf)
{
	assert(ts != NULL);
	assert(pBuf != NULL);
	
	if(ts->timeType == 1) {
		return(formatTimestamp3164(ts, pBuf, iLenBuf));
	}

	if(ts->timeType == 2) {
		return(formatTimestamp3339(ts, pBuf, iLenBuf));
	}

	return(0);
}
#endif


/**
 * Get the current date/time in the best resolution the operating
 * system has to offer (well, actually at most down to the milli-
 * second level.
 *
 * The date and time is returned in separate fields as this is
 * most portable and removes the need for additional structures
 * (but I have to admit it is somewhat "bulky";)).
 *
 * Obviously, all caller-provided pointers must not be NULL...
 */
void getCurrTime(struct syslogTime *t)
{
	struct timeval tp;
	struct tm *tm;
	long lBias;

	assert(t != NULL);
	gettimeofday(&tp, NULL);
	tm = localtime((time_t*) &(tp.tv_sec));

	t->year = tm->tm_year + 1900;
	t->month = tm->tm_mon + 1;
	t->day = tm->tm_mday;
	t->hour = tm->tm_hour;
	t->minute = tm->tm_min;
	t->second = tm->tm_sec;
	t->secfrac = tp.tv_usec;
	t->secfracPrecision = 6;

#	if __sun
		/* Solaris uses a different method of exporting the time zone.
		 * It is UTC - localtime, which is the opposite sign of mins east of GMT.
		 */
		lBias = -(daylight ? altzone : timezone);
#	else
		lBias = tm->tm_gmtoff;
#	endif
	if(lBias < 0)
	{
		t->OffsetMode = '-';
		lBias *= -1;
	}
	else
		t->OffsetMode = '+';
	t->OffsetHour = lBias / 3600;
	t->OffsetMinute = lBias % 3600;
}
/* rgerhards 2004-11-09: end of helper routines. On to the 
 * "real" code ;)
 */


static int usage(void)
{
	fprintf(stderr, "usage: rsyslogd [-46Adhvw] [-l hostlist] [-m markinterval] [-n] [-p path]\n" \
		" [-s domainlist] [-r[port]] [-tport[,max-sessions]] [-f conffile] [-i pidfile] [-x]\n");
	exit(1); /* "good" exit - done to terminate usage() */
}

#ifdef SYSLOG_UNIXAF
static int create_unix_socket(const char *path)
{
	struct sockaddr_un sunx;
	int fd;
	char line[MAXLINE +1];

	if (path[0] == '\0')
		return -1;

	(void) unlink(path);

	memset(&sunx, 0, sizeof(sunx));
	sunx.sun_family = AF_UNIX;
	(void) strncpy(sunx.sun_path, path, sizeof(sunx.sun_path));
	fd = socket(AF_UNIX, SOCK_DGRAM, 0);
	if (fd < 0 || bind(fd, (struct sockaddr *) &sunx,
			   SUN_LEN(&sunx)) < 0 ||
	    chmod(path, 0666) < 0) {
		snprintf(line, sizeof(line), "cannot create %s", path);
		logerror(line);
		dprintf("cannot create %s (%d).\n", path, errno);
		close(fd);
		return -1;
	}
	return fd;
}
#endif

#ifdef SYSLOG_INET
/* closes the UDP listen sockets (if they exist) and frees
 * all dynamically assigned memory. 
 */
static void closeUDPListenSockets()
{
	register int i;

        if(finet != NULL) {
	        for (i = 0; i < *finet; i++)
	                close(finet[i+1]);
		free(finet);
		finet = NULL;
	}
}


/* creates the UDP listen sockets
 */
static int *create_udp_socket()
{
        struct addrinfo hints, *res, *r;
        int error, maxs, *s, *socks, on = 1;
	int sockflags;

        memset(&hints, 0, sizeof(hints));
        hints.ai_flags = AI_PASSIVE | AI_NUMERICSERV;
        hints.ai_family = family;
        hints.ai_socktype = SOCK_DGRAM;
        error = getaddrinfo(NULL, LogPort, &hints, &res);
        if(error) {
               logerror((char*) gai_strerror(error));
	       logerror("UDP message reception disabled due to error logged in last message.\n");
	       return NULL;
	}

        /* Count max number of sockets we may open */
        for (maxs = 0, r = res; r != NULL ; r = r->ai_next, maxs++)
		/* EMPTY */;
        socks = malloc((maxs+1) * sizeof(int));
        if (socks == NULL) {
               logerror("couldn't allocate memory for UDP sockets, suspending UDP message reception");
               freeaddrinfo(res);
               return NULL;
        }

        *socks = 0;   /* num of sockets counter at start of array */
        s = socks + 1;
	for (r = res; r != NULL ; r = r->ai_next) {
               *s = socket(r->ai_family, r->ai_socktype, r->ai_protocol);
        	if (*s < 0) {
			if(!(r->ai_family == PF_INET6 && errno == EAFNOSUPPORT))
				logerror("create_udp_socket(), socket");
				/* it is debatable if PF_INET with EAFNOSUPPORT should
				 * also be ignored...
				 */
                        continue;
                }

#		ifdef IPV6_V6ONLY
                if (r->ai_family == AF_INET6) {
                	int ion = 1;
			if (setsockopt(*s, IPPROTO_IPV6, IPV6_V6ONLY,
			      (char *)&ion, sizeof (ion)) < 0) {
			logerror("setsockopt");
			close(*s);
			*s = -1;
			continue;
                	}
                }
#		endif

		/* if we have an error, we "just" suspend that socket. Eventually
		 * other sockets will work. At the end of this function, we check
		 * if we managed to open at least one socket. If not, we'll write
		 * a "inet suspended" message and declare failure. Else we use
		 * what we could obtain.
		 * rgerhards, 2007-06-22
		 */
       		if (setsockopt(*s, SOL_SOCKET, SO_REUSEADDR,
			       (char *) &on, sizeof(on)) < 0 ) {
			logerror("setsockopt(REUSEADDR)");
                        close(*s);
			*s = -1;
			continue;
		}

		/* We need to enable BSD compatibility. Otherwise an attacker
		 * could flood our log files by sending us tons of ICMP errors.
		 */
#ifndef BSD	
		if (should_use_so_bsdcompat()) {
			if (setsockopt(*s, SOL_SOCKET, SO_BSDCOMPAT,
					(char *) &on, sizeof(on)) < 0) {
				logerror("setsockopt(BSDCOMPAT)");
                                close(*s);
				*s = -1;
				continue;
			}
		}
#endif
		/* We must not block on the network socket, in case a packet
		 * gets lost between select and recv, otherwise the process
		 * will stall until the timeout, and other processes trying to
		 * log will also stall.
		 * Patch vom Colin Phipps <cph@cph.demon.co.uk> to the original
		 * sysklogd source. Applied to rsyslogd on 2005-10-19.
		 */
		if ((sockflags = fcntl(*s, F_GETFL)) != -1) {
			sockflags |= O_NONBLOCK;
			/* SETFL could fail too, so get it caught by the subsequent
			 * error check.
			 */
			sockflags = fcntl(*s, F_SETFL, sockflags);
		}
		if (sockflags == -1) {
			logerror("fcntl(O_NONBLOCK)");
                        close(*s);
			*s = -1;
			continue;
		}

		/* rgerhards, 2007-06-22: if we run on a kernel that does not support
		 * the IPV6_V6ONLY socket option, we need to use a work-around. On such
		 * systems the IPv6 socket does also accept IPv4 sockets. So an IPv4
		 * socket can not listen on the same port as an IPv6 socket. The only
		 * workaround is to ignore the "socket in use" error. This is what we
		 * do if we have to.
		 */
	        if(     (bind(*s, r->ai_addr, r->ai_addrlen) < 0)
#		ifndef IPV6_V6ONLY
		     && (errno != EADDRINUSE)
#		endif
	           ) {
                        logerror("bind");
                	close(*s);
			*s = -1;
                        continue;
                }

                (*socks)++;
                s++;
	}

        if(res != NULL)
               freeaddrinfo(res);

	if(Debug && *socks != maxs)
		dprintf("We could initialize %d UDP listen sockets out of %d we received "
		 	"- this may or may not be an error indication.\n", *socks, maxs);

        if(*socks == 0) {
		logerror("No UDP listen socket could successfully be initialized, "
			 "message reception via UDP disabled.\n");
		/* we do NOT need to free any sockets, because there were none... */
        	free(socks);
		return(NULL);
	}

	return(socks);
}
#endif


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

	assert(pThis != NULL);

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


/* function to construct a selector_t object
 * rgerhards, 2007-08-01
 */
static 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;
	return iRet;
}


/* 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])
		dprintf ("#%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) {
			(void) ioctl(i, (int) TIOCNOTTY, (char *)0);
			(void) close(i);
		}
	}
}
#endif


/* 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
 */
void printchopped(char *hname, char *msg, int len, int fd, int bParseHost)
{
	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);

	dprintf("Message length: %d, File descriptor: %d.\n", len, fd);

	/* we first 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') {
		*(msg + len - 1) = '\0';
		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


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