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/* common header for syslogd
* Copyright 2007 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.
*/
#ifndef SYSLOGD_H_INCLUDED
#define SYSLOGD_H_INCLUDED 1
#include "syslogd-types.h"
#include "objomsr.h"
#include "modules.h"
#include "template.h"
#include "action.h"
#include "linkedlist.h"
#include "expr.h"
/* portability: not all platforms have these defines, so we
* define them here if they are missing. -- rgerhards, 2008-03-04
*/
#ifndef LOG_MAKEPRI
# define LOG_MAKEPRI(fac, pri) (((fac) << 3) | (pri))
#endif
#ifndef LOG_PRI
# define LOG_PRI(p) ((p) & LOG_PRIMASK)
#endif
#ifndef LOG_FAC
# define LOG_FAC(p) (((p) & LOG_FACMASK) >> 3)
#endif
#ifdef USE_NETZIP
/* config param: minimum message size to try compression. The smaller
* the message, the less likely is any compression gain. We check for
* gain before we submit the message. But to do so we still need to
* do the (costly) compress() call. The following setting sets a size
* for which no call to compress() is done at all. This may result in
* a few more bytes being transmited but better overall performance.
* Note: I have not yet checked the minimum UDP packet size. It might be
* that we do not save anything by compressing very small messages, because
* UDP might need to pad ;)
* rgerhards, 2006-11-30
*/
#define MIN_SIZE_FOR_COMPRESS 60
#endif
#define MAXLINE 2048 /* maximum line length */
/* Flags to logmsg().
*/
#define NOFLAG 0x000 /* no flag is set (to be used when a flag must be specified and none is required) */
#define INTERNAL_MSG 0x001 /* msg generated by logmsgInternal() --> special handling */
#define SYNC_FILE 0x002 /* do fsync on file after printing */
#define ADDDATE 0x004 /* add a date to the message */
#define MARK 0x008 /* this message is a mark */
/* 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 */
FILTER_EXPR = 2 /* extended filter, expression based */
} f_filter_type;
EHostnameCmpMode eHostnameCmpMode;
cstr_t *pCSHostnameComp; /* hostname to check */
cstr_t *pCSProgNameComp; /* tag to check or NULL, if not to be checked */
union {
u_char f_pmask[LOG_NFACILITIES+1]; /* priority mask */
struct {
cstr_t *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;
cstr_t *pCSCompValue; /* value to "compare" against */
char isNegated; /* actually a boolean ;) */
} prop;
expr_t *f_expr; /* expression object */
} f_filterData;
linkedList_t llActList; /* list of configured actions */
};
typedef struct filed selector_t; /* new type name */
#define MSG_PARSE_HOSTNAME 1
#define MSG_DONT_PARSE_HOSTNAME 0
rsRetVal parseAndSubmitMessage(char *hname, char *msg, int len, int bParseHost, int flags, flowControl_t flowCtlType);
#include "net.h" /* TODO: remove when you remoe isAllowedSender from here! */
void untty(void);
rsRetVal selectorConstruct(selector_t **ppThis);
rsRetVal cflineParseTemplateName(uchar** pp, omodStringRequest_t *pOMSR, int iEntry, int iTplOpts, uchar *dfltTplName);
rsRetVal cflineParseFileName(uchar* p, uchar *pFileName, omodStringRequest_t *pOMSR, int iEntry, int iTplOpts, uchar *pszTpl);
int getSubString(uchar **ppSrc, char *pDst, size_t DstSize, char cSep);
rsRetVal selectorDestruct(void *pVal);
rsRetVal selectorAddList(selector_t *f);
/* the following prototypes should go away once we have an input
* module interface -- rgerhards, 2007-12-12
*/
rsRetVal logmsgInternal(int pri, char *msg, int flags);
void logmsg(msg_t *pMsg, int flags);
rsRetVal submitMsg(msg_t *pMsg);
extern int glblHadMemShortage; /* indicates if we had memory shortage some time during the run */
extern char LocalHostName[];
extern int family;
extern int NoHops;
extern int send_to_all;
extern int option_DisallowWarning;
extern int Debug;
extern char**LocalHosts;
extern int DisableDNS;
extern char **StripDomains;
extern char *LocalDomain;
extern int bDropMalPTRMsgs;
extern char ctty[];
extern int MarkInterval;
extern int bReduceRepeatMsgs;
extern int bActExecWhenPrevSusp;
/* 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: move this to action object!
*/
extern int repeatinterval[2];
#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; \
}
#endif /* #ifndef SYSLOGD_H_INCLUDED */
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