diff options
Diffstat (limited to '')
| -rw-r--r-- | plugins/imklog/Makefile.am | 20 | ||||
| -rw-r--r-- | plugins/imklog/Makefile.in | 818 | ||||
| -rw-r--r-- | plugins/imklog/bsd.c | 329 | ||||
| -rw-r--r-- | plugins/imklog/imklog.c | 549 | ||||
| -rw-r--r-- | plugins/imklog/imklog.h | 77 |
5 files changed, 1793 insertions, 0 deletions
diff --git a/plugins/imklog/Makefile.am b/plugins/imklog/Makefile.am new file mode 100644 index 0000000..3626eec --- /dev/null +++ b/plugins/imklog/Makefile.am @@ -0,0 +1,20 @@ +pkglib_LTLIBRARIES = imklog.la +imklog_la_SOURCES = imklog.c imklog.h + +# select klog "driver" +if ENABLE_IMKLOG_BSD +imklog_la_SOURCES += bsd.c +endif + +if ENABLE_IMKLOG_LINUX +imklog_la_SOURCES += bsd.c +endif + +imklog_la_CPPFLAGS = -I$(top_srcdir) $(PTHREADS_CFLAGS) $(RSRT_CFLAGS) +imklog_la_LDFLAGS = -module -avoid-version +imklog_la_LIBADD = + +if ENABLE_LIBLOGGING_STDLOG +imklog_la_CPPFLAGS += $(LIBLOGGING_STDLOG_CFLAGS) +imklog_la_LDFLAGS += $(LIBLOGGING_STDLOG_LIBS) +endif diff --git a/plugins/imklog/Makefile.in b/plugins/imklog/Makefile.in new file mode 100644 index 0000000..54bd041 --- /dev/null +++ b/plugins/imklog/Makefile.in @@ -0,0 +1,818 @@ +# Makefile.in generated by automake 1.16.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2018 Free Software Foundation, Inc. + +# This Makefile.in is free software; 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For a general overview, see head comment in + * imklog.c. This started out as the BSD-specific drivers, but it + * turned out that on modern Linux the implementation details + * are very small, and so we use a single driver for both OS's with + * a little help of conditional compilation. + * + * Copyright 2008-2023 Adiscon GmbH + * + * This file is part of rsyslog. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <string.h> +#include <ctype.h> +#ifdef OS_LINUX +# include <sys/klog.h> +#endif + +#include "rsyslog.h" +#include "srUtils.h" +#include "debug.h" +#include "imklog.h" + +/* globals */ +static int fklog = -1; /* kernel log fd */ + +#ifndef _PATH_KLOG +# ifdef OS_LINUX +# define _PATH_KLOG "/proc/kmsg" +# else +# define _PATH_KLOG "/dev/klog" +# endif +#endif + + +#ifdef OS_LINUX +/* submit a message to imklog Syslog() API. In this function, we check if + * a kernel timestamp is present and, if so, extract and strip it. + * Note that this is heavily Linux specific and thus is not compiled or + * used for BSD. + * Special thanks to Lennart Poettering for suggesting on how to convert + * the kernel timestamp to a realtime timestamp. This method depends on + * the fact the the kernel timestamp is written using the monotonic clock. + * Shall that change (very unlikely), this code must be changed as well. Note + * that due to the way we generate the delta, we are unable to write the + * absolutely correct timestamp (system call overhead of the clock calls + * prevents us from doing so). However, the difference is very minor. + * rgerhards, 2011-06-24 + */ +static void +submitSyslog(modConfData_t *pModConf, syslog_pri_t pri, uchar *buf) +{ + long secs; + long usecs; + long secOffs; + long usecOffs; + unsigned i; + unsigned bufsize; + struct timespec monotonic, realtime; + struct timeval tv; + struct timeval *tp = NULL; + + /* find end of pri */ + int endpri = 1; + while(buf[endpri] != '>' && endpri < 5) + ++endpri; + if(endpri > 4 || buf[endpri + 1] != '[') + goto done; + DBGPRINTF("imklog: kernel timestamp detected, extracting it\n"); + + /* we now try to parse the timestamp. iff it parses, we assume + * it is a timestamp. Otherwise we know for sure it is no ts ;) + */ + i = endpri + 2; /* space or first digit after '[' */ + while(buf[i] && isspace(buf[i])) + ++i; /* skip space */ + secs = 0; + while(buf[i] && isdigit(buf[i])) { + secs = secs * 10 + buf[i] - '0'; + ++i; + } + if(buf[i] != '.') { + DBGPRINTF("no dot --> no kernel timestamp\n"); + goto done; /* no TS! */ + } + + ++i; /* skip dot */ + usecs = 0; + while(buf[i] && isdigit(buf[i])) { + usecs = usecs * 10 + buf[i] - '0'; + ++i; + } + if(buf[i] != ']') { + DBGPRINTF("no trailing ']' --> no kernel timestamp\n"); + goto done; /* no TS! */ + } + ++i; /* skip ']' */ + + /* we have a timestamp */ + DBGPRINTF("kernel timestamp is %ld %ld\n", secs, usecs); + if(!pModConf->bKeepKernelStamp) { + bufsize= strlen((char*)buf); + memmove(buf+endpri+1, buf+i, bufsize - i + 1); + } + + if(!pModConf->bParseKernelStamp) { + DBGPRINTF("imklog/bsd: parseKernelStamp not set, ignoring kernel timestamp\n"); + goto done; + } + + clock_gettime(CLOCK_MONOTONIC, &monotonic); + clock_gettime(CLOCK_REALTIME, &realtime); + secOffs = realtime.tv_sec - monotonic.tv_sec; + usecOffs = (realtime.tv_nsec - monotonic.tv_nsec) / 1000; + if(usecOffs < 0) { + secOffs--; + usecOffs += 1000000l; + } + + usecs += usecOffs; + if(usecs > 999999l) { + secs++; + usecs -= 1000000l; + } + secs += secOffs; + tv.tv_sec = secs; + tv.tv_usec = usecs; + tp = &tv; + +done: + Syslog(pModConf, pri, buf, tp); +} +#else /* now comes the BSD "code" (just a shim) */ +static void +submitSyslog(modConfData_t *pModConf, syslog_pri_t pri, uchar *buf) +{ + Syslog(pModConf, pri, buf, NULL); +} +#endif /* #ifdef LINUX */ + + +static uchar *GetPath(modConfData_t *pModConf) +{ + return pModConf->pszPath ? pModConf->pszPath : (uchar*) _PATH_KLOG; +} + +/* open the kernel log - will be called inside the willRun() imklog + * entry point. -- rgerhards, 2008-04-09 + */ +rsRetVal +klogWillRunPrePrivDrop(modConfData_t *pModConf) +{ + char errmsg[2048]; + DEFiRet; + + fklog = open((char*)GetPath(pModConf), O_RDONLY, 0); + if (fklog < 0) { + imklogLogIntMsg(LOG_ERR, "imklog: cannot open kernel log (%s): %s.", + GetPath(pModConf), rs_strerror_r(errno, errmsg, sizeof(errmsg))); + ABORT_FINALIZE(RS_RET_ERR_OPEN_KLOG); + } + +# ifdef OS_LINUX + /* Set level of kernel console messaging.. */ + if(pModConf->console_log_level != -1) { + int r = klogctl(8, NULL, pModConf->console_log_level); + if(r != 0) { + imklogLogIntMsg(LOG_WARNING, "imklog: cannot set console log level: %s", + rs_strerror_r(errno, errmsg, sizeof(errmsg))); + /* make sure we do not try to re-set! */ + pModConf->console_log_level = -1; + } + } +# endif /* #ifdef OS_LINUX */ + +finalize_it: + RETiRet; +} + +/* make sure the kernel log is readable after dropping privileges + */ +rsRetVal +klogWillRunPostPrivDrop(modConfData_t *pModConf) +{ + char errmsg[2048]; + int r; + DEFiRet; + + /* this normally returns EINVAL */ + /* on an OpenVZ VM, we get EPERM */ + r = read(fklog, NULL, 0); + if (r < 0 && errno != EINVAL) { + imklogLogIntMsg(LOG_ERR, "imklog: cannot open kernel log (%s): %s.", + GetPath(pModConf), rs_strerror_r(errno, errmsg, sizeof(errmsg))); + fklog = -1; + ABORT_FINALIZE(RS_RET_ERR_OPEN_KLOG); + } + +finalize_it: + RETiRet; +} + + +/* Read kernel log while data are available, split into lines. + */ +static void +readklog(modConfData_t *pModConf) +{ + char *p, *q; + int len, i; + int iMaxLine; + uchar bufRcv[128*1024+1]; + char errmsg[2048]; + uchar *pRcv = NULL; /* receive buffer */ + + iMaxLine = klog_getMaxLine(); + + /* we optimize performance: if iMaxLine is below our fixed size buffer (which + * usually is sufficiently large), we use this buffer. if it is higher, heap memory + * is used. We could use alloca() to achive a similar aspect, but there are so + * many issues with alloca() that I do not want to take that route. + * rgerhards, 2008-09-02 + */ + if((size_t) iMaxLine < sizeof(bufRcv) - 1) { + pRcv = bufRcv; + } else { + if((pRcv = (uchar*) malloc(iMaxLine + 1)) == NULL) { + iMaxLine = sizeof(bufRcv) - 1; /* better this than noting */ + pRcv = bufRcv; + } + } + + len = 0; + for (;;) { + dbgprintf("imklog(BSD/Linux) waiting for kernel log line\n"); + i = read(fklog, pRcv + len, iMaxLine - len); + if (i > 0) { + pRcv[i + len] = '\0'; + } else { + if (i < 0 && errno != EINTR && errno != EAGAIN) { + imklogLogIntMsg(LOG_ERR, + "imklog: error reading kernel log - shutting down: %s", + rs_strerror_r(errno, errmsg, sizeof(errmsg))); + fklog = -1; + } + break; + } + + for (p = (char*)pRcv; (q = strchr(p, '\n')) != NULL; p = q + 1) { + *q = '\0'; + submitSyslog(pModConf, LOG_INFO, (uchar*) p); + } + len = strlen(p); + if (len >= iMaxLine - 1) { + submitSyslog(pModConf, LOG_INFO, (uchar*)p); + len = 0; + } + if(len > 0) + memmove(pRcv, p, len + 1); + } + if (len > 0) + submitSyslog(pModConf, LOG_INFO, pRcv); + + if(pRcv != bufRcv) + free(pRcv); +} + + +/* to be called in the module's AfterRun entry point + * rgerhards, 2008-04-09 + */ +rsRetVal ATTR_NONNULL() +klogAfterRun(modConfData_t *const pModConf __attribute__((unused))) +{ + DEFiRet; + if(fklog != -1) + close(fklog); +# ifdef OS_LINUX + /* Turn on logging of messages to console, but only if a log level was speficied */ + if(pModConf->console_log_level != -1) + klogctl(7, NULL, 0); +# endif + RETiRet; +} + + + +/* to be called in the module's WillRun entry point, this is the main + * "message pull" mechanism. + * rgerhards, 2008-04-09 + */ +rsRetVal klogLogKMsg(modConfData_t *pModConf) +{ + DEFiRet; + readklog(pModConf); + RETiRet; +} + + +/* provide the (system-specific) default facility for internal messages + * rgerhards, 2008-04-14 + */ +int +klogFacilIntMsg(void) +{ + return LOG_SYSLOG; +} diff --git a/plugins/imklog/imklog.c b/plugins/imklog/imklog.c new file mode 100644 index 0000000..3935026 --- /dev/null +++ b/plugins/imklog/imklog.c @@ -0,0 +1,549 @@ +/* The kernel log module. + * + * This is an abstracted module. As Linux and BSD kernel log is conceptually the + * same, we do not do different input plugins for them but use + * imklog in both cases, just with different "backend drivers" for + * the different platforms. This also enables a rsyslog.conf to + * be used on multiple platforms without the need to take care of + * what the kernel log is coming from. + * + * See platform-specific files (e.g. linux.c, bsd.c) in the plugin's + * working directory. For other systems with similar kernel logging + * functionality, no new input plugin shall be written but rather a + * driver be developed for imklog. Please note that imklog itself is + * mostly concerned with handling the interface. Any real action happens + * in the drivers, as things may be pretty different on different + * platforms. + * + * Please note that this file replaces the klogd daemon that was + * also present in pre-v3 versions of rsyslog. + * + * To test under Linux: + * echo test1 > /dev/kmsg + * + * Copyright (C) 2008-2020 Adiscon GmbH + * + * This file is part of rsyslog. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#include "config.h" +#include "rsyslog.h" +#include <stdio.h> +#include <assert.h> +#include <string.h> +#include <stdarg.h> +#include <ctype.h> +#include <stdlib.h> +#include <sys/socket.h> + +#include "dirty.h" +#include "cfsysline.h" +#include "parserif.h" +#include "obj.h" +#include "msg.h" +#include "module-template.h" +#include "datetime.h" +#include "imklog.h" +#include "net.h" +#include "glbl.h" +#include "prop.h" +#include "errmsg.h" +#include "unicode-helper.h" +#include "ruleset.h" + + +MODULE_TYPE_INPUT +MODULE_TYPE_NOKEEP +MODULE_CNFNAME("imklog") + +/* Module static data */ +DEF_IMOD_STATIC_DATA +DEFobjCurrIf(datetime) +DEFobjCurrIf(ruleset) +DEFobjCurrIf(glbl) +DEFobjCurrIf(prop) +DEFobjCurrIf(net) + +/* config settings */ +typedef struct configSettings_s { + int bPermitNonKernel; /* permit logging of messages not having LOG_KERN facility */ + int bParseKernelStamp; /* if try to parse kernel timestamps for message time */ + int bKeepKernelStamp; /* keep the kernel timestamp in the message */ + int iFacilIntMsg; /* the facility to use for internal messages (set by driver) */ + uchar *pszPath; + int console_log_level; /* still used for BSD */ + unsigned int ratelimitInterval; + unsigned int ratelimitBurst; +} configSettings_t; +static configSettings_t cs; + +static modConfData_t *loadModConf = NULL;/* modConf ptr to use for the current load process */ +static modConfData_t *runModConf = NULL;/* modConf ptr to use for the current load process */ +static int bLegacyCnfModGlobalsPermitted;/* are legacy module-global config parameters permitted? */ + +/* module-global parameters */ +static struct cnfparamdescr modpdescr[] = { + { "ruleset", eCmdHdlrString, 0 }, + { "logpath", eCmdHdlrGetWord, 0 }, + { "permitnonkernelfacility", eCmdHdlrBinary, 0 }, + { "consoleloglevel", eCmdHdlrInt, 0 }, + { "parsekerneltimestamp", eCmdHdlrBinary, 0 }, + { "keepkerneltimestamp", eCmdHdlrBinary, 0 }, + { "internalmsgfacility", eCmdHdlrFacility, 0 }, + { "ratelimitinterval", eCmdHdlrInt, 0 }, + { "ratelimitburst", eCmdHdlrInt, 0 } +}; +static struct cnfparamblk modpblk = + { CNFPARAMBLK_VERSION, + sizeof(modpdescr)/sizeof(struct cnfparamdescr), + modpdescr + }; + +static prop_t *pInputName = NULL; +/* there is only one global inputName for all messages generated by this module */ +static prop_t *pLocalHostIP = NULL; + +/** POTENTIAL COMMON CODE FOR RULESET CHECK **/ +static inline void std_mod_checkRuleset_genErrMsg(const modConfData_t *const modConf); +static inline rsRetVal +std_mod_checkRuleset(modConfData_t *const modConf) +{ + ruleset_t *pRuleset; + rsRetVal localRet; + DEFiRet; + + modConf->pBindRuleset = NULL; /* assume default ruleset */ + + if(modConf->pszBindRuleset == NULL) + FINALIZE; + + localRet = ruleset.GetRuleset(modConf->pConf, &pRuleset, modConf->pszBindRuleset); + if(localRet == RS_RET_NOT_FOUND) { + std_mod_checkRuleset_genErrMsg(modConf); + } + CHKiRet(localRet); + modConf->pBindRuleset = pRuleset; + +finalize_it: + RETiRet; +} +/** END POTENTIAL COMMON CODE FOR RULESET CHECK **/ +static inline void +std_mod_checkRuleset_genErrMsg(const modConfData_t *const modConf) +{ + LogError(0, NO_ERRCODE, "imklog: ruleset '%s' not found - " + "using default ruleset instead", modConf->pszBindRuleset); +} + +static void +initConfigSettings(void) +{ + cs.bPermitNonKernel = 0; + cs.bParseKernelStamp = 0; + cs.bKeepKernelStamp = 0; + cs.console_log_level = -1; + cs.pszPath = NULL; + cs.iFacilIntMsg = klogFacilIntMsg(); +} + + +/* enqueue the the kernel message into the message queue. + * The provided msg string is not freed - thus must be done + * by the caller. + * rgerhards, 2008-04-12 + */ +static rsRetVal +enqMsg(uchar *const __restrict__ msg, + uchar* pszTag, + const syslog_pri_t pri, + struct timeval *tp, + ratelimit_t *ratelimiter) +{ + struct syslogTime st; + smsg_t *pMsg; + DEFiRet; + + assert(msg != NULL); + assert(pszTag != NULL); + + if(tp == NULL) { + CHKiRet(msgConstruct(&pMsg)); + } else { + datetime.timeval2syslogTime(tp, &st, TIME_IN_LOCALTIME); + CHKiRet(msgConstructWithTime(&pMsg, &st, tp->tv_sec)); + } + MsgSetFlowControlType(pMsg, eFLOWCTL_LIGHT_DELAY); + MsgSetInputName(pMsg, pInputName); + MsgSetRawMsgWOSize(pMsg, (char*)msg); + MsgSetRuleset(pMsg, runModConf->pBindRuleset); + MsgSetMSGoffs(pMsg, 0); /* we do not have a header... */ + MsgSetRcvFrom(pMsg, glbl.GetLocalHostNameProp()); + MsgSetRcvFromIP(pMsg, pLocalHostIP); + MsgSetHOSTNAME(pMsg, glbl.GetLocalHostName(), ustrlen(glbl.GetLocalHostName())); + MsgSetTAG(pMsg, pszTag, ustrlen(pszTag)); + msgSetPRI(pMsg, pri); + ratelimitAddMsg(ratelimiter, NULL, pMsg); +finalize_it: + RETiRet; +} + +/* parse the PRI from a kernel message. At least BSD seems to have + * non-kernel messages inside the kernel log... + * Expected format: "<pri>". piPri is only valid if the function + * successfully returns. If there was a proper pri ppSz is advanced to the + * position right after ">". + * rgerhards, 2008-04-14 + */ +static rsRetVal +parsePRI(uchar **ppSz, syslog_pri_t *piPri) +{ + DEFiRet; + syslog_pri_t i; + uchar *pSz; + + assert(ppSz != NULL); + pSz = *ppSz; + assert(pSz != NULL); + assert(piPri != NULL); + + if(*pSz != '<' || !isdigit(*(pSz+1))) + ABORT_FINALIZE(RS_RET_INVALID_PRI); + + ++pSz; + i = 0; + while(isdigit(*pSz) && i <= LOG_MAXPRI) { + i = i * 10 + *pSz++ - '0'; + } + + if(*pSz != '>' || i > LOG_MAXPRI) + ABORT_FINALIZE(RS_RET_INVALID_PRI); + + /* OK, we have a valid PRI */ + *piPri = i; + *ppSz = pSz + 1; /* update msg ptr to position after PRI */ + +finalize_it: + RETiRet; +} + + +/* log an imklog-internal message + * rgerhards, 2008-04-14 + */ +rsRetVal imklogLogIntMsg(syslog_pri_t priority, const char *fmt, ...) +{ + DEFiRet; + va_list ap; + uchar msgBuf[2048]; /* we use the same size as sysklogd to remain compatible */ + + va_start(ap, fmt); + vsnprintf((char*)msgBuf, sizeof(msgBuf), fmt, ap); + va_end(ap); + + logmsgInternal(NO_ERRCODE, priority, msgBuf, 0); + + RETiRet; +} + + +/* log a kernel message. If tp is non-NULL, it contains the message creation + * time to use. + * rgerhards, 2008-04-14 + */ +rsRetVal Syslog(modConfData_t *pModConf, syslog_pri_t priority, uchar *pMsg, struct timeval *tp) +{ + syslog_pri_t pri; + int bPRISet = 0; + rsRetVal localRet; + DEFiRet; + + /* then check if we have two PRIs. This can happen in case of systemd, + * in which case the second PRI is the right one. + */ + if(pMsg[3] == '<' || (pMsg[3] == ' ' && pMsg[4] == '<')) { /* could be a pri... */ + uchar *pMsgTmp = pMsg + ((pMsg[3] == '<') ? 3 : 4); + localRet = parsePRI(&pMsgTmp, &pri); + if(localRet == RS_RET_OK && pri >= 8 && pri <= LOG_MAXPRI) { + /* *this* is our PRI */ + DBGPRINTF("imklog detected secondary PRI(%d) in klog msg\n", pri); + pMsg = pMsgTmp; + priority = pri; + bPRISet = 1; + } + } + if(!bPRISet) { + localRet = parsePRI(&pMsg, &priority); + if(localRet != RS_RET_INVALID_PRI && localRet != RS_RET_OK) + FINALIZE; + } + /* if we don't get the pri, we use whatever we were supplied */ + + /* ignore non-kernel messages if not permitted */ + if(pModConf->bPermitNonKernel == 0 && pri2fac(priority) != LOG_KERN) + FINALIZE; /* silently ignore */ + iRet = enqMsg((uchar*)pMsg, (uchar*) "kernel:", priority, tp, pModConf->ratelimiter); + +finalize_it: + RETiRet; +} + + +/* helper for some klog drivers which need to know the MaxLine global setting. They can + * not obtain it themselfs, because they are no modules and can not query the object hander. + * It would probably be a good idea to extend the interface to support it, but so far + * we create a (sufficiently valid) work-around. -- rgerhards, 2008-11-24 + */ +int klog_getMaxLine(void) +{ + return glbl.GetMaxLine(runConf); +} + + +BEGINrunInput +CODESTARTrunInput + /* this is an endless loop - it is terminated when the thread is + * signalled to do so. This, however, is handled by the framework, + * right into the sleep below. + */ + while(!pThrd->bShallStop) { + /* klogLogKMsg() waits for the next kernel message, obtains it + * and then submits it to the rsyslog main queue. + * rgerhards, 2008-04-09 + */ + CHKiRet(klogLogKMsg(runModConf)); + } +finalize_it: +ENDrunInput + + +BEGINbeginCnfLoad +CODESTARTbeginCnfLoad + loadModConf = pModConf; + pModConf->pConf = pConf; + /* init our settings */ + pModConf->pszPath = NULL; + pModConf->bPermitNonKernel = 0; + pModConf->bParseKernelStamp = 0; + pModConf->bKeepKernelStamp = 0; + pModConf->console_log_level = -1; + pModConf->bKeepKernelStamp = 0; + pModConf->iFacilIntMsg = klogFacilIntMsg(); + loadModConf->configSetViaV2Method = 0; + pModConf->ratelimiter = NULL; + pModConf->ratelimitBurst = 10000; /* arbitrary high limit */ + pModConf->ratelimitInterval = 0; /* off */ + bLegacyCnfModGlobalsPermitted = 1; + /* init legacy config vars */ + initConfigSettings(); +ENDbeginCnfLoad + + +BEGINsetModCnf + struct cnfparamvals *pvals = NULL; + int i; +CODESTARTsetModCnf + pvals = nvlstGetParams(lst, &modpblk, NULL); + if(pvals == NULL) { + LogError(0, RS_RET_MISSING_CNFPARAMS, "error processing module " + "config parameters [module(...)]"); + ABORT_FINALIZE(RS_RET_MISSING_CNFPARAMS); + } + + if(Debug) { + dbgprintf("module (global) param blk for imklog:\n"); + cnfparamsPrint(&modpblk, pvals); + } + + for(i = 0 ; i < modpblk.nParams ; ++i) { + if(!pvals[i].bUsed) + continue; + if(!strcmp(modpblk.descr[i].name, "logpath")) { + loadModConf->pszPath = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else if(!strcmp(modpblk.descr[i].name, "permitnonkernelfacility")) { + loadModConf->bPermitNonKernel = (int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "parsekerneltimestamp")) { + loadModConf->bParseKernelStamp = (int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "keepkerneltimestamp")) { + loadModConf->bKeepKernelStamp = (int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "consoleloglevel")) { + loadModConf->console_log_level= (int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "internalmsgfacility")) { + loadModConf->iFacilIntMsg = (int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "ratelimitburst")) { + loadModConf->ratelimitBurst = (unsigned int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "ratelimitinterval")) { + loadModConf->ratelimitInterval = (unsigned int) pvals[i].val.d.n; + } else if(!strcmp(modpblk.descr[i].name, "ruleset")) { + loadModConf->pszBindRuleset = (uchar*)es_str2cstr(pvals[i].val.d.estr, NULL); + } else { + LogMsg(0, RS_RET_INTERNAL_ERROR, LOG_WARNING, + "imklog: RSYSLOG BUG, non-handled param '%s' in " + "beginCnfLoad\n", modpblk.descr[i].name); + } + } + + /* disable legacy module-global config directives */ + bLegacyCnfModGlobalsPermitted = 0; + loadModConf->configSetViaV2Method = 1; + +finalize_it: + if(pvals != NULL) + cnfparamvalsDestruct(pvals, &modpblk); +ENDsetModCnf + + +BEGINendCnfLoad +CODESTARTendCnfLoad + if(!loadModConf->configSetViaV2Method) { + /* persist module-specific settings from legacy config system */ + loadModConf->bPermitNonKernel = cs.bPermitNonKernel; + loadModConf->bParseKernelStamp = cs.bParseKernelStamp; + loadModConf->bKeepKernelStamp = cs.bKeepKernelStamp; + loadModConf->iFacilIntMsg = cs.iFacilIntMsg; + loadModConf->console_log_level = cs.console_log_level; + if((cs.pszPath == NULL) || (cs.pszPath[0] == '\0')) { + loadModConf->pszPath = NULL; + if(cs.pszPath != NULL) + free(cs.pszPath); + } else { + loadModConf->pszPath = cs.pszPath; + } + cs.pszPath = NULL; + } + + loadModConf = NULL; /* done loading */ +ENDendCnfLoad + + +BEGINcheckCnf +CODESTARTcheckCnf + std_mod_checkRuleset(pModConf); +ENDcheckCnf + + +BEGINactivateCnfPrePrivDrop +CODESTARTactivateCnfPrePrivDrop + runModConf = pModConf; + iRet = klogWillRunPrePrivDrop(runModConf); +ENDactivateCnfPrePrivDrop + + +BEGINactivateCnf +CODESTARTactivateCnf + CHKiRet(ratelimitNew(&runModConf->ratelimiter, "imklog", NULL)); + ratelimitSetLinuxLike(runModConf->ratelimiter, + runModConf->ratelimitInterval, + runModConf->ratelimitBurst); +finalize_it: +ENDactivateCnf + + +BEGINfreeCnf +CODESTARTfreeCnf + free(pModConf->pszBindRuleset); +ENDfreeCnf + + +BEGINwillRun +CODESTARTwillRun + pLocalHostIP = glbl.GetLocalHostIP(); + iRet = klogWillRunPostPrivDrop(runModConf); +ENDwillRun + + +BEGINafterRun +CODESTARTafterRun + ratelimitDestruct(runModConf->ratelimiter); + iRet = klogAfterRun(runModConf); +ENDafterRun + + +BEGINmodExit +CODESTARTmodExit + if(pInputName != NULL) + prop.Destruct(&pInputName); + + /* release objects we used */ + objRelease(glbl, CORE_COMPONENT); + objRelease(net, CORE_COMPONENT); + objRelease(datetime, CORE_COMPONENT); + objRelease(ruleset, CORE_COMPONENT); + objRelease(prop, CORE_COMPONENT); +ENDmodExit + + +BEGINqueryEtryPt +CODESTARTqueryEtryPt +CODEqueryEtryPt_STD_IMOD_QUERIES +CODEqueryEtryPt_STD_CONF2_QUERIES +CODEqueryEtryPt_STD_CONF2_setModCnf_QUERIES +CODEqueryEtryPt_STD_CONF2_PREPRIVDROP_QUERIES +ENDqueryEtryPt + +static rsRetVal resetConfigVariables(uchar __attribute__((unused)) *pp, void __attribute__((unused)) *pVal) +{ + cs.bPermitNonKernel = 0; + cs.bParseKernelStamp = 0; + cs.bKeepKernelStamp = 0; + if(cs.pszPath != NULL) { + free(cs.pszPath); + cs.pszPath = NULL; + } + cs.iFacilIntMsg = klogFacilIntMsg(); + return RS_RET_OK; +} + +BEGINmodInit() +CODESTARTmodInit + *ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */ +CODEmodInit_QueryRegCFSLineHdlr + CHKiRet(objUse(datetime, CORE_COMPONENT)); + CHKiRet(objUse(glbl, CORE_COMPONENT)); + CHKiRet(objUse(prop, CORE_COMPONENT)); + CHKiRet(objUse(ruleset, CORE_COMPONENT)); + CHKiRet(objUse(net, CORE_COMPONENT)); + + /* we need to create the inputName property (only once during our lifetime) */ + CHKiRet(prop.CreateStringProp(&pInputName, UCHAR_CONSTANT("imklog"), sizeof("imklog") - 1)); + + /* init legacy config settings */ + initConfigSettings(); + + CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogLocalipif", 0, eCmdHdlrGoneAway, + NULL, NULL, STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr((uchar *)"debugprintkernelsymbols", 0, eCmdHdlrGoneAway, + NULL, NULL, STD_LOADABLE_MODULE_ID)); + CHKiRet(regCfSysLineHdlr2((uchar *)"klogpath", 0, eCmdHdlrGetWord, + NULL, &cs.pszPath, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted)); + CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogsymbollookup", 0, eCmdHdlrGoneAway, + NULL, NULL, STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogsymbolstwice", 0, eCmdHdlrGoneAway, + NULL, NULL, STD_LOADABLE_MODULE_ID)); + CHKiRet(omsdRegCFSLineHdlr((uchar *)"klogusesyscallinterface", 0, eCmdHdlrGoneAway, + NULL, NULL, STD_LOADABLE_MODULE_ID)); + CHKiRet(regCfSysLineHdlr2((uchar *)"klogpermitnonkernelfacility", 0, eCmdHdlrBinary, + NULL, &cs.bPermitNonKernel, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted)); + CHKiRet(regCfSysLineHdlr2((uchar *)"klogconsoleloglevel", 0, eCmdHdlrInt, + NULL, &cs.console_log_level, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted)); + CHKiRet(regCfSysLineHdlr2((uchar *)"kloginternalmsgfacility", 0, eCmdHdlrFacility, + NULL, &cs.iFacilIntMsg, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted)); + CHKiRet(regCfSysLineHdlr2((uchar *)"klogparsekerneltimestamp", 0, eCmdHdlrBinary, + NULL, &cs.bParseKernelStamp, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted)); + CHKiRet(regCfSysLineHdlr2((uchar *)"klogkeepkerneltimestamp", 0, eCmdHdlrBinary, + NULL, &cs.bKeepKernelStamp, STD_LOADABLE_MODULE_ID, &bLegacyCnfModGlobalsPermitted)); + CHKiRet(omsdRegCFSLineHdlr((uchar *)"resetconfigvariables", 1, eCmdHdlrCustomHandler, + resetConfigVariables, NULL, STD_LOADABLE_MODULE_ID)); +ENDmodInit diff --git a/plugins/imklog/imklog.h b/plugins/imklog/imklog.h new file mode 100644 index 0000000..0ccc320 --- /dev/null +++ b/plugins/imklog/imklog.h @@ -0,0 +1,77 @@ +/* imklog.h + * These are the definitions for the klog message generation module. + * + * File begun on 2007-12-17 by RGerhards + * Major change: 2008-04-09: switched to a driver interface for + * several platforms + * + * Copyright 2007-2015 Rainer Gerhards and Adiscon GmbH. + * + * This file is part of rsyslog. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * -or- + * see COPYING.ASL20 in the source distribution + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef IMKLOG_H_INCLUDED +#define IMKLOG_H_INCLUDED 1 + +#include "rsyslog.h" +#include "dirty.h" +#include "ratelimit.h" + +/* we need to have the modConf type present in all submodules */ +struct modConfData_s { + rsconf_t *pConf; + int iFacilIntMsg; + uchar *pszPath; + int console_log_level; + sbool bParseKernelStamp; + sbool bKeepKernelStamp; + sbool bPermitNonKernel; + sbool configSetViaV2Method; + ratelimit_t *ratelimiter; + int ratelimitInterval; + int ratelimitBurst; + ruleset_t *pBindRuleset; /* ruleset to bind (use system default if unspecified) */ + uchar *pszBindRuleset; +}; + +/* interface to "drivers" + * the platform specific drivers must implement these entry points. Only one + * driver may be active at any given time, thus we simply rely on the linker + * to resolve the addresses. + * rgerhards, 2008-04-09 + */ +rsRetVal klogLogKMsg(modConfData_t *pModConf); +rsRetVal klogAfterRun(modConfData_t *pModConf); +rsRetVal klogWillRunPrePrivDrop(modConfData_t *pModConf); +rsRetVal klogWillRunPostPrivDrop(modConfData_t *pModConf); +int klogFacilIntMsg(void); + +/* the functions below may be called by the drivers */ +rsRetVal imklogLogIntMsg(syslog_pri_t priority, const char *fmt, ...) __attribute__((format(printf,2, 3))); +rsRetVal Syslog(modConfData_t *pModConf, syslog_pri_t priority, uchar *msg, struct timeval *tp); + +/* prototypes */ +extern int klog_getMaxLine(void); /* work-around for klog drivers to get configured max line size */ +extern int InitKsyms(modConfData_t*); +extern void DeinitKsyms(void); +extern int InitMsyms(void); +extern void DeinitMsyms(void); +extern char * ExpandKadds(char *, char *); +extern void SetParanoiaLevel(int); + +#endif /* #ifndef IMKLOG_H_INCLUDED */ +/* vi:set ai: + */ |