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+/* The config file handler (not yet a real object)
+ *
+ * This file is based on an excerpt from syslogd.c, which dates back
+ * much later. I began the file on 2008-02-19 as part of the modularization
+ * effort. Over time, a clean abstration will become even more important
+ * because the config file handler will by dynamically be loaded and be
+ * kept in memory only as long as the config file is actually being
+ * processed. Thereafter, it shall be unloaded. -- rgerhards
+ *
+ * TODO: the license MUST be changed to LGPL. However, we can not
+ * currently do that, because we use some sysklogd code to crunch
+ * the selector lines (e.g. *.info). That code is scheduled for removal
+ * as part of RainerScript. After this is done, we can change licenses.
+ *
+ * Copyright 2008 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of rsyslog.
+ *
+ * Rsyslog is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Rsyslog is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Rsyslog. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+
+#include "config.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <string.h>
+#include <dlfcn.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <ctype.h>
+#include <assert.h>
+#include <dirent.h>
+#include <glob.h>
+#include <sys/types.h>
+#ifdef HAVE_LIBGEN_H
+# include <libgen.h>
+#endif
+
+#include "rsyslog.h"
+#include "../tools/syslogd.h" /* TODO: this must be removed! */
+#include "dirty.h"
+#include "parse.h"
+#include "action.h"
+#include "template.h"
+#include "cfsysline.h"
+#include "modules.h"
+#include "outchannel.h"
+#include "stringbuf.h"
+#include "conf.h"
+#include "stringbuf.h"
+#include "srUtils.h"
+#include "errmsg.h"
+#include "net.h"
+#include "expr.h"
+#include "ctok.h"
+#include "ctok_token.h"
+
+
+/* forward definitions */
+static rsRetVal cfline(uchar *line, selector_t **pfCurr);
+static rsRetVal processConfFile(uchar *pConfFile);
+
+
+/* static data */
+DEFobjStaticHelpers
+DEFobjCurrIf(expr)
+DEFobjCurrIf(ctok)
+DEFobjCurrIf(ctok_token)
+DEFobjCurrIf(module)
+DEFobjCurrIf(errmsg)
+DEFobjCurrIf(net)
+
+/* 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
+ */
+EHostnameCmpMode eDfltHostnameCmpMode;
+cstr_t *pDfltHostnameCmp;
+cstr_t *pDfltProgNameCmp;
+
+
+/* process a directory and include all of its files into
+ * the current config file. There is no specific order of inclusion,
+ * files are included in the order they are read from the directory.
+ * The caller must have make sure that the provided parameter is
+ * indeed a directory.
+ * rgerhards, 2007-08-01
+ */
+static rsRetVal doIncludeDirectory(uchar *pDirName)
+{
+ DEFiRet;
+ int iEntriesDone = 0;
+ DIR *pDir;
+ union {
+ struct dirent d;
+ char b[offsetof(struct dirent, d_name) + NAME_MAX + 1];
+ } u;
+ struct dirent *res;
+ size_t iDirNameLen;
+ size_t iFileNameLen;
+ uchar szFullFileName[MAXFNAME];
+
+ ASSERT(pDirName != NULL);
+
+ if((pDir = opendir((char*) pDirName)) == NULL) {
+ errmsg.LogError(errno, RS_RET_FOPEN_FAILURE, "error opening include directory");
+ ABORT_FINALIZE(RS_RET_FOPEN_FAILURE);
+ }
+
+ /* prepare file name buffer */
+ iDirNameLen = strlen((char*) pDirName);
+ memcpy(szFullFileName, pDirName, iDirNameLen);
+
+ /* now read the directory */
+ iEntriesDone = 0;
+ while(readdir_r(pDir, &u.d, &res) == 0) {
+ if(res == NULL)
+ break; /* this also indicates end of directory */
+# ifdef DT_REG
+ /* TODO: find an alternate way to checking for special files if this is
+ * not defined. This is currently a known problem on HP UX, but the work-
+ * around is simple: do not create special files in that directory. So
+ * fixing this is actually not the most important thing on earth...
+ * rgerhards, 2008-03-04
+ */
+ if(res->d_type != DT_REG)
+ continue; /* we are not interested in special files */
+# endif
+ if(res->d_name[0] == '.')
+ continue; /* these files we are also not interested in */
+ ++iEntriesDone;
+ /* construct filename */
+ iFileNameLen = strlen(res->d_name);
+ if (iFileNameLen > NAME_MAX)
+ iFileNameLen = NAME_MAX;
+ memcpy(szFullFileName + iDirNameLen, res->d_name, iFileNameLen);
+ *(szFullFileName + iDirNameLen + iFileNameLen) = '\0';
+ dbgprintf("including file '%s'\n", szFullFileName);
+ processConfFile(szFullFileName);
+ /* we deliberately ignore the iRet of processConfFile() - this is because
+ * failure to process one file does not mean all files will fail. By ignoring,
+ * we retry with the next file, which is the best thing we can do. -- rgerhards, 2007-08-01
+ */
+ }
+
+ if(iEntriesDone == 0) {
+ /* I just make it a debug output, because I can think of a lot of cases where it
+ * makes sense not to have any files. E.g. a system maintainer may place a $Include
+ * into the config file just in case, when additional modules be installed. When none
+ * are installed, the directory will be empty, which is fine. -- rgerhards 2007-08-01
+ */
+ dbgprintf("warning: the include directory contained no files - this may be ok.\n");
+ }
+
+finalize_it:
+ if(pDir != NULL)
+ closedir(pDir);
+
+ RETiRet;
+}
+
+
+/* process a $include config line. That type of line requires
+ * inclusion of another file.
+ * rgerhards, 2007-08-01
+ */
+rsRetVal
+doIncludeLine(uchar **pp, __attribute__((unused)) void* pVal)
+{
+ DEFiRet;
+ char pattern[MAXFNAME];
+ uchar *cfgFile;
+ glob_t cfgFiles;
+ size_t i = 0;
+ struct stat fileInfo;
+
+ ASSERT(pp != NULL);
+ ASSERT(*pp != NULL);
+
+ if(getSubString(pp, (char*) pattern, sizeof(pattern) / sizeof(char), ' ') != 0) {
+ errmsg.LogError(0, RS_RET_NOT_FOUND, "could not extract group name");
+ ABORT_FINALIZE(RS_RET_NOT_FOUND);
+ }
+
+ /* Use GLOB_MARK to append a trailing slash for directories.
+ * Required by doIncludeDirectory().
+ */
+ glob(pattern, GLOB_MARK, NULL, &cfgFiles);
+
+ for(i = 0; i < cfgFiles.gl_pathc; i++) {
+ cfgFile = (uchar*) cfgFiles.gl_pathv[i];
+
+ if(stat((char*) cfgFile, &fileInfo) != 0)
+ continue; /* continue with the next file if we can't stat() the file */
+
+ if(S_ISREG(fileInfo.st_mode)) { /* config file */
+ dbgprintf("requested to include config file '%s'\n", cfgFile);
+ iRet = processConfFile(cfgFile);
+ } else if(S_ISDIR(fileInfo.st_mode)) { /* config directory */
+ dbgprintf("requested to include directory '%s'\n", cfgFile);
+ iRet = doIncludeDirectory(cfgFile);
+ } else { /* TODO: shall we handle symlinks or not? */
+ dbgprintf("warning: unable to process IncludeConfig directive '%s'\n", cfgFile);
+ }
+ }
+
+ globfree(&cfgFiles);
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* process a $ModLoad config line.
+ */
+rsRetVal
+doModLoad(uchar **pp, __attribute__((unused)) void* pVal)
+{
+ DEFiRet;
+ uchar szName[512];
+ uchar *pModName;
+
+ ASSERT(pp != NULL);
+ ASSERT(*pp != NULL);
+
+ skipWhiteSpace(pp); /* skip over any whitespace */
+ if(getSubString(pp, (char*) szName, sizeof(szName) / sizeof(uchar), ' ') != 0) {
+ errmsg.LogError(0, RS_RET_NOT_FOUND, "could not extract module name");
+ ABORT_FINALIZE(RS_RET_NOT_FOUND);
+ }
+ skipWhiteSpace(pp); /* skip over any whitespace */
+
+ /* this below is a quick and dirty hack to provide compatibility with the
+ * $ModLoad MySQL forward compatibility statement. TODO: clean this up
+ * For the time being, it is clean enough, it just needs to be done
+ * differently when we have a full design for loadable plug-ins. For the
+ * time being, we just mangle the names a bit.
+ * rgerhards, 2007-08-14
+ */
+ if(!strcmp((char*) szName, "MySQL"))
+ pModName = (uchar*) "ommysql.so";
+ else
+ pModName = szName;
+
+ CHKiRet(module.Load(pModName));
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* parse and interpret a $-config line that starts with
+ * a name (this is common code). It is parsed to the name
+ * and then the proper sub-function is called to handle
+ * the actual directive.
+ * rgerhards 2004-11-17
+ * rgerhards 2005-06-21: previously only for templates, now
+ * generalized.
+ */
+rsRetVal
+doNameLine(uchar **pp, void* pVal)
+{
+ DEFiRet;
+ uchar *p;
+ enum eDirective eDir;
+ char szName[128];
+
+ ASSERT(pp != NULL);
+ p = *pp;
+ ASSERT(p != NULL);
+
+ eDir = (enum eDirective) pVal; /* this time, it actually is NOT a pointer! */
+
+ if(getSubString(&p, szName, sizeof(szName) / sizeof(char), ',') != 0) {
+ errmsg.LogError(0, RS_RET_NOT_FOUND, "Invalid config line: could not extract name - line ignored");
+ ABORT_FINALIZE(RS_RET_NOT_FOUND);
+ }
+ if(*p == ',')
+ ++p; /* comma was eaten */
+
+ /* we got the name - now we pass name & the rest of the string
+ * to the subfunction. It makes no sense to do further
+ * parsing here, as this is in close interaction with the
+ * respective subsystem. rgerhards 2004-11-17
+ */
+
+ switch(eDir) {
+ case DIR_TEMPLATE:
+ tplAddLine(szName, &p);
+ break;
+ case DIR_OUTCHANNEL:
+ ochAddLine(szName, &p);
+ break;
+ case DIR_ALLOWEDSENDER:
+ net.addAllowedSenderLine(szName, &p);
+ break;
+ default:/* we do this to avoid compiler warning - not all
+ * enum values call this function, so an incomplete list
+ * is quite ok (but then we should not run into this code,
+ * so at least we log a debug warning).
+ */
+ dbgprintf("INTERNAL ERROR: doNameLine() called with invalid eDir %d.\n",
+ eDir);
+ break;
+ }
+
+ *pp = p;
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* Parse and interpret a system-directive in the config line
+ * A system directive is one that starts with a "$" sign. It offers
+ * extended configuration parameters.
+ * 2004-11-17 rgerhards
+ */
+rsRetVal
+cfsysline(uchar *p)
+{
+ DEFiRet;
+ uchar szCmd[64];
+
+ ASSERT(p != NULL);
+ errno = 0;
+ if(getSubString(&p, (char*) szCmd, sizeof(szCmd) / sizeof(uchar), ' ') != 0) {
+ errmsg.LogError(0, RS_RET_NOT_FOUND, "Invalid $-configline - could not extract command - line ignored\n");
+ ABORT_FINALIZE(RS_RET_NOT_FOUND);
+ }
+
+ /* we now try and see if we can find the command in the registered
+ * list of cfsysline handlers. -- rgerhards, 2007-07-31
+ */
+ CHKiRet(processCfSysLineCommand(szCmd, &p));
+
+ /* now check if we have some extra characters left on the line - that
+ * should not be the case. Whitespace is OK, but everything else should
+ * trigger a warning (that may be an indication of undesired behaviour).
+ * An exception, of course, are comments (starting with '#').
+ * rgerhards, 2007-07-04
+ */
+ skipWhiteSpace(&p);
+
+ if(*p && *p != '#') { /* we have a non-whitespace, so let's complain */
+ errmsg.LogError(0, NO_ERRCODE,
+ "error: extra characters in config line ignored: '%s'", p);
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+
+
+
+/* process a configuration file
+ * started with code from init() by rgerhards on 2007-07-31
+ */
+static rsRetVal
+processConfFile(uchar *pConfFile)
+{
+ DEFiRet;
+ int iLnNbr = 0;
+ FILE *cf;
+ selector_t *fCurr = NULL;
+ uchar *p;
+ uchar cbuf[BUFSIZ];
+ uchar *cline;
+ int i;
+ ASSERT(pConfFile != NULL);
+
+ if((cf = fopen((char*)pConfFile, "r")) == NULL) {
+ ABORT_FINALIZE(RS_RET_FOPEN_FAILURE);
+ }
+
+ /* Now process the file.
+ */
+ cline = cbuf;
+ while (fgets((char*)cline, sizeof(cbuf) - (cline - cbuf), cf) != NULL) {
+ ++iLnNbr;
+ /* drop LF - TODO: make it better, replace fgets(), but its clean as it is */
+ if(cline[strlen((char*)cline)-1] == '\n') {
+ cline[strlen((char*)cline) -1] = '\0';
+ }
+ /* check for end-of-section, comments, strip off trailing
+ * spaces and newline character.
+ */
+ p = cline;
+ skipWhiteSpace(&p);
+ if (*p == '\0' || *p == '#')
+ continue;
+
+ /* we now need to copy the characters to the begin of line. As this overlaps,
+ * we can not use strcpy(). -- rgerhards, 2008-03-20
+ * TODO: review the code at whole - this is highly suspect (but will go away
+ * once we do the rest of RainerScript).
+ */
+ /* was: strcpy((char*)cline, (char*)p); */
+ for( i = 0 ; p[i] != '\0' ; ++i) {
+ cline[i] = p[i];
+ }
+ cline[i] = '\0';
+
+ for (p = (uchar*) strchr((char*)cline, '\0'); isspace((int) *--p);)
+ /*EMPTY*/;
+ if (*p == '\\') {
+ if ((p - cbuf) > BUFSIZ - 30) {
+ /* Oops the buffer is full - what now? */
+ cline = cbuf;
+ } else {
+ *p = 0;
+ cline = p;
+ continue;
+ }
+ } else
+ cline = cbuf;
+ *++p = '\0'; /* TODO: check this */
+
+ /* we now have the complete line, and are positioned at the first non-whitespace
+ * character. So let's process it
+ */
+ if(cfline(cbuf, &fCurr) != RS_RET_OK) {
+ /* we log a message, but otherwise ignore the error. After all, the next
+ * line can be correct. -- rgerhards, 2007-08-02
+ */
+ uchar szErrLoc[MAXFNAME + 64];
+ dbgprintf("config line NOT successfully processed\n");
+ snprintf((char*)szErrLoc, sizeof(szErrLoc) / sizeof(uchar),
+ "%s, line %d", pConfFile, iLnNbr);
+ errmsg.LogError(0, NO_ERRCODE, "the last error occured in %s", (char*)szErrLoc);
+ }
+ }
+
+ /* we probably have one selector left to be added - so let's do that now */
+ CHKiRet(selectorAddList(fCurr));
+
+ /* close the configuration file */
+ (void) fclose(cf);
+
+finalize_it:
+ if(iRet != RS_RET_OK) {
+ char errStr[1024];
+ if(fCurr != NULL)
+ selectorDestruct(fCurr);
+
+ rs_strerror_r(errno, errStr, sizeof(errStr));
+ dbgprintf("error %d processing config file '%s'; os error (if any): %s\n",
+ iRet, pConfFile, errStr);
+ }
+ RETiRet;
+}
+
+
+/* Helper to cfline() and its helpers. Parses a template name
+ * from an "action" line. Must be called with the Line pointer
+ * pointing to the first character after the semicolon.
+ * rgerhards 2004-11-19
+ * changed function to work with OMSR. -- rgerhards, 2007-07-27
+ * the default template is to be used when no template is specified.
+ */
+rsRetVal cflineParseTemplateName(uchar** pp, omodStringRequest_t *pOMSR, int iEntry, int iTplOpts, uchar *dfltTplName)
+{
+ uchar *p;
+ uchar *tplName;
+ cstr_t *pStrB;
+ DEFiRet;
+
+ ASSERT(pp != NULL);
+ ASSERT(*pp != NULL);
+ ASSERT(pOMSR != NULL);
+
+ p =*pp;
+ /* a template must follow - search it and complain, if not found */
+ skipWhiteSpace(&p);
+ if(*p == ';')
+ ++p; /* eat it */
+ else if(*p != '\0' && *p != '#') {
+ errmsg.LogError(0, RS_RET_ERR, "invalid character in selector line - ';template' expected");
+ ABORT_FINALIZE(RS_RET_ERR);
+ }
+
+ skipWhiteSpace(&p); /* go to begin of template name */
+
+ if(*p == '\0' || *p == '#') {
+ /* no template specified, use the default */
+ /* TODO: check NULL ptr */
+ tplName = (uchar*) strdup((char*)dfltTplName);
+ } else {
+ /* template specified, pick it up */
+ if(rsCStrConstruct(&pStrB) != RS_RET_OK) {
+ ABORT_FINALIZE(RS_RET_OUT_OF_MEMORY);
+ }
+
+ /* now copy the string */
+ while(*p && *p != '#' && !isspace((int) *p)) {
+ CHKiRet(rsCStrAppendChar(pStrB, *p));
+ ++p;
+ }
+ CHKiRet(rsCStrFinish(pStrB));
+ CHKiRet(rsCStrConvSzStrAndDestruct(pStrB, &tplName, 0));
+ }
+
+ iRet = OMSRsetEntry(pOMSR, iEntry, tplName, iTplOpts);
+ if(iRet != RS_RET_OK) goto finalize_it;
+
+finalize_it:
+ *pp = p;
+
+ RETiRet;
+}
+
+/* Helper to cfline(). Parses a file name up until the first
+ * comma and then looks for the template specifier. Tries
+ * to find that template.
+ * rgerhards 2004-11-18
+ * parameter pFileName must point to a buffer large enough
+ * to hold the largest possible filename.
+ * rgerhards, 2007-07-25
+ * updated to include OMSR pointer -- rgerhards, 2007-07-27
+ * updated to include template name -- rgerhards, 2008-03-28
+ */
+rsRetVal
+cflineParseFileName(uchar* p, uchar *pFileName, omodStringRequest_t *pOMSR, int iEntry, int iTplOpts, uchar *pszTpl)
+{
+ register uchar *pName;
+ int i;
+ DEFiRet;
+
+ ASSERT(pOMSR != NULL);
+
+ pName = pFileName;
+ i = 1; /* we start at 1 so that we reseve space for the '\0'! */
+ while(*p && *p != ';' && i < MAXFNAME) {
+ *pName++ = *p++;
+ ++i;
+ }
+ *pName = '\0';
+
+ iRet = cflineParseTemplateName(&p, pOMSR, iEntry, iTplOpts, pszTpl);
+
+ RETiRet;
+}
+
+
+/*
+ * Helper to cfline(). This function takes the filter part of a traditional, PRI
+ * based line and decodes the PRIs given in the selector line. It processed the
+ * line up to the beginning of the action part. A pointer to that beginnig is
+ * passed back to the caller.
+ * rgerhards 2005-09-15
+ */
+/* GPLv3 - stems back to sysklogd */
+static rsRetVal cflineProcessTradPRIFilter(uchar **pline, register selector_t *f)
+{
+ uchar *p;
+ register uchar *q;
+ register int i, i2;
+ uchar *bp;
+ int pri;
+ int singlpri = 0;
+ int ignorepri = 0;
+ uchar buf[MAXLINE];
+ uchar xbuf[200];
+
+ ASSERT(pline != NULL);
+ ASSERT(*pline != NULL);
+ ASSERT(f != NULL);
+
+ dbgprintf(" - traditional PRI filter\n");
+ errno = 0; /* keep strerror_r() stuff out of logerror messages */
+
+ f->f_filter_type = FILTER_PRI;
+ /* Note: file structure is pre-initialized to zero because it was
+ * created with calloc()!
+ */
+ for (i = 0; i <= LOG_NFACILITIES; i++) {
+ f->f_filterData.f_pmask[i] = TABLE_NOPRI;
+ }
+
+ /* scan through the list of selectors */
+ for (p = *pline; *p && *p != '\t' && *p != ' ';) {
+
+ /* find the end of this facility name list */
+ for (q = p; *q && *q != '\t' && *q++ != '.'; )
+ continue;
+
+ /* collect priority name */
+ for (bp = buf; *q && !strchr("\t ,;", *q); )
+ *bp++ = *q++;
+ *bp = '\0';
+
+ /* skip cruft */
+ while (strchr(",;", *q))
+ q++;
+
+ /* decode priority name */
+ if ( *buf == '!' ) {
+ ignorepri = 1;
+ for (bp=buf; *(bp+1); bp++)
+ *bp=*(bp+1);
+ *bp='\0';
+ }
+ else {
+ ignorepri = 0;
+ }
+ if ( *buf == '=' )
+ {
+ singlpri = 1;
+ pri = decodeSyslogName(&buf[1], syslogPriNames);
+ }
+ else {
+ singlpri = 0;
+ pri = decodeSyslogName(buf, syslogPriNames);
+ }
+
+ if (pri < 0) {
+ snprintf((char*) xbuf, sizeof(xbuf), "unknown priority name \"%s\"", buf);
+ errmsg.LogError(0, RS_RET_ERR, "%s", xbuf);
+ return RS_RET_ERR;
+ }
+
+ /* scan facilities */
+ while (*p && !strchr("\t .;", *p)) {
+ for (bp = buf; *p && !strchr("\t ,;.", *p); )
+ *bp++ = *p++;
+ *bp = '\0';
+ if (*buf == '*') {
+ for (i = 0; i <= LOG_NFACILITIES; i++) {
+ if ( pri == INTERNAL_NOPRI ) {
+ if ( ignorepri )
+ f->f_filterData.f_pmask[i] = TABLE_ALLPRI;
+ else
+ f->f_filterData.f_pmask[i] = TABLE_NOPRI;
+ }
+ else if ( singlpri ) {
+ if ( ignorepri )
+ f->f_filterData.f_pmask[i] &= ~(1<<pri);
+ else
+ f->f_filterData.f_pmask[i] |= (1<<pri);
+ }
+ else
+ {
+ if ( pri == TABLE_ALLPRI ) {
+ if ( ignorepri )
+ f->f_filterData.f_pmask[i] = TABLE_NOPRI;
+ else
+ f->f_filterData.f_pmask[i] = TABLE_ALLPRI;
+ }
+ else
+ {
+ if ( ignorepri )
+ for (i2= 0; i2 <= pri; ++i2)
+ f->f_filterData.f_pmask[i] &= ~(1<<i2);
+ else
+ for (i2= 0; i2 <= pri; ++i2)
+ f->f_filterData.f_pmask[i] |= (1<<i2);
+ }
+ }
+ }
+ } else {
+ i = decodeSyslogName(buf, syslogFacNames);
+ if (i < 0) {
+
+ snprintf((char*) xbuf, sizeof(xbuf), "unknown facility name \"%s\"", buf);
+ errmsg.LogError(0, RS_RET_ERR, "%s", xbuf);
+ return RS_RET_ERR;
+ }
+
+ if ( pri == INTERNAL_NOPRI ) {
+ if ( ignorepri )
+ f->f_filterData.f_pmask[i >> 3] = TABLE_ALLPRI;
+ else
+ f->f_filterData.f_pmask[i >> 3] = TABLE_NOPRI;
+ } else if ( singlpri ) {
+ if ( ignorepri )
+ f->f_filterData.f_pmask[i >> 3] &= ~(1<<pri);
+ else
+ f->f_filterData.f_pmask[i >> 3] |= (1<<pri);
+ } else {
+ if ( pri == TABLE_ALLPRI ) {
+ if ( ignorepri )
+ f->f_filterData.f_pmask[i >> 3] = TABLE_NOPRI;
+ else
+ f->f_filterData.f_pmask[i >> 3] = TABLE_ALLPRI;
+ } else {
+ if ( ignorepri )
+ for (i2= 0; i2 <= pri; ++i2)
+ f->f_filterData.f_pmask[i >> 3] &= ~(1<<i2);
+ else
+ for (i2= 0; i2 <= pri; ++i2)
+ f->f_filterData.f_pmask[i >> 3] |= (1<<i2);
+ }
+ }
+ }
+ while (*p == ',' || *p == ' ')
+ p++;
+ }
+
+ p = q;
+ }
+
+ /* skip to action part */
+ while (*p == '\t' || *p == ' ')
+ p++;
+
+ *pline = p;
+ return RS_RET_OK;
+}
+
+
+/* Helper to cfline(). This function processes an "if" type of filter,
+ * what essentially means it parses an expression. As usual,
+ * It processes the line up to the beginning of the action part.
+ * A pointer to that beginnig is passed back to the caller.
+ * rgerhards 2008-01-19
+ */
+static rsRetVal cflineProcessIfFilter(uchar **pline, register selector_t *f)
+{
+ DEFiRet;
+ ctok_t *tok;
+ ctok_token_t *pToken;
+
+ ASSERT(pline != NULL);
+ ASSERT(*pline != NULL);
+ ASSERT(f != NULL);
+
+ dbgprintf(" - general expression-based filter\n");
+ errno = 0; /* keep strerror_r() stuff out of logerror messages */
+
+dbgprintf("calling expression parser, pp %p ('%s')\n", *pline, *pline);
+ f->f_filter_type = FILTER_EXPR;
+
+ /* if we come to over here, pline starts with "if ". We just skip that part. */
+ (*pline) += 3;
+
+ /* we first need a tokenizer... */
+ CHKiRet(ctok.Construct(&tok));
+ CHKiRet(ctok.Setpp(tok, *pline));
+ CHKiRet(ctok.ConstructFinalize(tok));
+
+ /* now construct our expression */
+ CHKiRet(expr.Construct(&f->f_filterData.f_expr));
+ CHKiRet(expr.ConstructFinalize(f->f_filterData.f_expr));
+
+ /* ready to go... */
+ CHKiRet(expr.Parse(f->f_filterData.f_expr, tok));
+
+ /* we now need to parse off the "then" - and note an error if it is
+ * missing...
+ */
+ CHKiRet(ctok.GetToken(tok, &pToken));
+ if(pToken->tok != ctok_THEN) {
+ ctok_token.Destruct(&pToken);
+ ABORT_FINALIZE(RS_RET_SYNTAX_ERROR);
+ }
+
+ ctok_token.Destruct(&pToken); /* no longer needed */
+
+ /* we are done, so we now need to restore things */
+ CHKiRet(ctok.Getpp(tok, pline));
+ CHKiRet(ctok.Destruct(&tok));
+
+ /* we now need to skip whitespace to the action part, else we confuse
+ * the legacy rsyslog conf parser. -- rgerhards, 2008-02-25
+ */
+ while(isspace(**pline))
+ ++(*pline);
+
+finalize_it:
+ if(iRet == RS_RET_SYNTAX_ERROR) {
+ errmsg.LogError(0, RS_RET_SYNTAX_ERROR, "syntax error in expression");
+ }
+
+ RETiRet;
+}
+
+
+/* Helper to cfline(). This function takes the filter part of a property
+ * based filter and decodes it. It processes the line up to the beginning
+ * of the action part. A pointer to that beginnig is passed back to the caller.
+ * rgerhards 2005-09-15
+ */
+static rsRetVal cflineProcessPropFilter(uchar **pline, register selector_t *f)
+{
+ rsParsObj *pPars;
+ cstr_t *pCSCompOp;
+ rsRetVal iRet;
+ int iOffset; /* for compare operations */
+
+ ASSERT(pline != NULL);
+ ASSERT(*pline != NULL);
+ ASSERT(f != NULL);
+
+ dbgprintf(" - property-based filter\n");
+ errno = 0; /* keep strerror_r() stuff out of logerror messages */
+
+ f->f_filter_type = FILTER_PROP;
+
+ /* create parser object starting with line string without leading colon */
+ if((iRet = rsParsConstructFromSz(&pPars, (*pline)+1)) != RS_RET_OK) {
+ errmsg.LogError(0, iRet, "Error %d constructing parser object - ignoring selector", iRet);
+ return(iRet);
+ }
+
+ /* read property */
+ iRet = parsDelimCStr(pPars, &f->f_filterData.prop.pCSPropName, ',', 1, 1, 1);
+ if(iRet != RS_RET_OK) {
+ errmsg.LogError(0, iRet, "error %d parsing filter property - ignoring selector", iRet);
+ rsParsDestruct(pPars);
+ return(iRet);
+ }
+
+ /* read operation */
+ iRet = parsDelimCStr(pPars, &pCSCompOp, ',', 1, 1, 1);
+ if(iRet != RS_RET_OK) {
+ errmsg.LogError(0, iRet, "error %d compare operation property - ignoring selector", iRet);
+ rsParsDestruct(pPars);
+ return(iRet);
+ }
+
+ /* we now first check if the condition is to be negated. To do so, we first
+ * must make sure we have at least one char in the param and then check the
+ * first one.
+ * rgerhards, 2005-09-26
+ */
+ if(rsCStrLen(pCSCompOp) > 0) {
+ if(*rsCStrGetBufBeg(pCSCompOp) == '!') {
+ f->f_filterData.prop.isNegated = 1;
+ iOffset = 1; /* ignore '!' */
+ } else {
+ f->f_filterData.prop.isNegated = 0;
+ iOffset = 0;
+ }
+ } else {
+ f->f_filterData.prop.isNegated = 0;
+ iOffset = 0;
+ }
+
+ if(!rsCStrOffsetSzStrCmp(pCSCompOp, iOffset, (uchar*) "contains", 8)) {
+ f->f_filterData.prop.operation = FIOP_CONTAINS;
+ } else if(!rsCStrOffsetSzStrCmp(pCSCompOp, iOffset, (uchar*) "isequal", 7)) {
+ f->f_filterData.prop.operation = FIOP_ISEQUAL;
+ } else if(!rsCStrOffsetSzStrCmp(pCSCompOp, iOffset, (uchar*) "startswith", 10)) {
+ f->f_filterData.prop.operation = FIOP_STARTSWITH;
+ } else if(!rsCStrOffsetSzStrCmp(pCSCompOp, iOffset, (unsigned char*) "regex", 5)) {
+ f->f_filterData.prop.operation = FIOP_REGEX;
+ } else {
+ errmsg.LogError(0, NO_ERRCODE, "error: invalid compare operation '%s' - ignoring selector",
+ (char*) rsCStrGetSzStrNoNULL(pCSCompOp));
+ }
+ rsCStrDestruct(&pCSCompOp); /* no longer needed */
+
+ /* read compare value */
+ iRet = parsQuotedCStr(pPars, &f->f_filterData.prop.pCSCompValue);
+ if(iRet != RS_RET_OK) {
+ errmsg.LogError(0, iRet, "error %d compare value property - ignoring selector", iRet);
+ rsParsDestruct(pPars);
+ return(iRet);
+ }
+
+ /* skip to action part */
+ if((iRet = parsSkipWhitespace(pPars)) != RS_RET_OK) {
+ errmsg.LogError(0, iRet, "error %d skipping to action part - ignoring selector", iRet);
+ rsParsDestruct(pPars);
+ return(iRet);
+ }
+
+ /* cleanup */
+ *pline = *pline + rsParsGetParsePointer(pPars) + 1;
+ /* we are adding one for the skipped initial ":" */
+
+ return rsParsDestruct(pPars);
+}
+
+
+/*
+ * Helper to cfline(). This function interprets a BSD host selector line
+ * from the config file ("+/-hostname"). It stores it for further reference.
+ * rgerhards 2005-10-19
+ */
+static rsRetVal cflineProcessHostSelector(uchar **pline)
+{
+ rsRetVal iRet;
+
+ ASSERT(pline != NULL);
+ ASSERT(*pline != NULL);
+ ASSERT(**pline == '-' || **pline == '+');
+
+ dbgprintf(" - host selector line\n");
+
+ /* check include/exclude setting */
+ if(**pline == '+') {
+ eDfltHostnameCmpMode = HN_COMP_MATCH;
+ } else { /* we do not check for '-', it must be, else we wouldn't be here */
+ eDfltHostnameCmpMode = HN_COMP_NOMATCH;
+ }
+ (*pline)++; /* eat + or - */
+
+ /* the below is somewhat of a quick hack, but it is efficient (this is
+ * why it is in here. "+*" resets the tag selector with BSD syslog. We mimic
+ * this, too. As it is easy to check that condition, we do not fire up a
+ * parser process, just make sure we do not address beyond our space.
+ * Order of conditions in the if-statement is vital! rgerhards 2005-10-18
+ */
+ if(**pline != '\0' && **pline == '*' && *(*pline+1) == '\0') {
+ dbgprintf("resetting BSD-like hostname filter\n");
+ eDfltHostnameCmpMode = HN_NO_COMP;
+ if(pDfltHostnameCmp != NULL) {
+ if((iRet = rsCStrSetSzStr(pDfltHostnameCmp, NULL)) != RS_RET_OK)
+ return(iRet);
+ }
+ } else {
+ dbgprintf("setting BSD-like hostname filter to '%s'\n", *pline);
+ if(pDfltHostnameCmp == NULL) {
+ /* create string for parser */
+ if((iRet = rsCStrConstructFromszStr(&pDfltHostnameCmp, *pline)) != RS_RET_OK)
+ return(iRet);
+ } else { /* string objects exists, just update... */
+ if((iRet = rsCStrSetSzStr(pDfltHostnameCmp, *pline)) != RS_RET_OK)
+ return(iRet);
+ }
+ }
+ return RS_RET_OK;
+}
+
+
+/*
+ * Helper to cfline(). This function interprets a BSD tag selector line
+ * from the config file ("!tagname"). It stores it for further reference.
+ * rgerhards 2005-10-18
+ */
+static rsRetVal cflineProcessTagSelector(uchar **pline)
+{
+ rsRetVal iRet;
+
+ ASSERT(pline != NULL);
+ ASSERT(*pline != NULL);
+ ASSERT(**pline == '!');
+
+ dbgprintf(" - programname selector line\n");
+
+ (*pline)++; /* eat '!' */
+
+ /* the below is somewhat of a quick hack, but it is efficient (this is
+ * why it is in here. "!*" resets the tag selector with BSD syslog. We mimic
+ * this, too. As it is easy to check that condition, we do not fire up a
+ * parser process, just make sure we do not address beyond our space.
+ * Order of conditions in the if-statement is vital! rgerhards 2005-10-18
+ */
+ if(**pline != '\0' && **pline == '*' && *(*pline+1) == '\0') {
+ dbgprintf("resetting programname filter\n");
+ if(pDfltProgNameCmp != NULL) {
+ if((iRet = rsCStrSetSzStr(pDfltProgNameCmp, NULL)) != RS_RET_OK)
+ return(iRet);
+ }
+ } else {
+ dbgprintf("setting programname filter to '%s'\n", *pline);
+ if(pDfltProgNameCmp == NULL) {
+ /* create string for parser */
+ if((iRet = rsCStrConstructFromszStr(&pDfltProgNameCmp, *pline)) != RS_RET_OK)
+ return(iRet);
+ } else { /* string objects exists, just update... */
+ if((iRet = rsCStrSetSzStr(pDfltProgNameCmp, *pline)) != RS_RET_OK)
+ return(iRet);
+ }
+ }
+ return RS_RET_OK;
+}
+
+
+/* read the filter part of a configuration line and store the filter
+ * in the supplied selector_t
+ * rgerhards, 2007-08-01
+ */
+static rsRetVal cflineDoFilter(uchar **pp, selector_t *f)
+{
+ DEFiRet;
+
+ ASSERT(pp != NULL);
+ ASSERT(f != NULL);
+
+ /* check which filter we need to pull... */
+ switch(**pp) {
+ case ':':
+ CHKiRet(cflineProcessPropFilter(pp, f));
+ break;
+ case 'i': /* "if" filter? */
+ if(*(*pp+1) && (*(*pp+1) == 'f') && isspace(*(*pp+2))) {
+ CHKiRet(cflineProcessIfFilter(pp, f));
+ break;
+ }
+ /*FALLTHROUGH*/
+ default:
+ CHKiRet(cflineProcessTradPRIFilter(pp, f));
+ break;
+ }
+
+ /* we now check if there are some global (BSD-style) filter conditions
+ * and, if so, we copy them over. rgerhards, 2005-10-18
+ */
+ if(pDfltProgNameCmp != NULL) {
+ CHKiRet(rsCStrConstructFromCStr(&(f->pCSProgNameComp), pDfltProgNameCmp));
+ }
+
+ if(eDfltHostnameCmpMode != HN_NO_COMP) {
+ f->eHostnameCmpMode = eDfltHostnameCmpMode;
+ CHKiRet(rsCStrConstructFromCStr(&(f->pCSHostnameComp), pDfltHostnameCmp));
+ }
+
+finalize_it:
+ RETiRet;
+}
+
+
+/* process the action part of a selector line
+ * rgerhards, 2007-08-01
+ */
+static rsRetVal cflineDoAction(uchar **p, action_t **ppAction)
+{
+ DEFiRet;
+ modInfo_t *pMod;
+ omodStringRequest_t *pOMSR;
+ action_t *pAction;
+ void *pModData;
+
+ ASSERT(p != NULL);
+ ASSERT(ppAction != NULL);
+
+ /* loop through all modules and see if one picks up the line */
+ pMod = module.GetNxtType(NULL, eMOD_OUT);
+ while(pMod != NULL) {
+ pOMSR = NULL;
+ iRet = pMod->mod.om.parseSelectorAct(p, &pModData, &pOMSR);
+ dbgprintf("tried selector action for %s: %d\n", module.GetName(pMod), iRet);
+ if(iRet == RS_RET_OK || iRet == RS_RET_SUSPENDED) {
+ if((iRet = addAction(&pAction, pMod, pModData, pOMSR, (iRet == RS_RET_SUSPENDED)? 1 : 0)) == RS_RET_OK) {
+ /* now check if the module is compatible with select features */
+ if(pMod->isCompatibleWithFeature(sFEATURERepeatedMsgReduction) == RS_RET_OK)
+ pAction->f_ReduceRepeated = bReduceRepeatMsgs;
+ else {
+ dbgprintf("module is incompatible with RepeatedMsgReduction - turned off\n");
+ pAction->f_ReduceRepeated = 0;
+ }
+ pAction->bEnabled = 1; /* action is enabled */
+ }
+ break;
+ }
+ else if(iRet != RS_RET_CONFLINE_UNPROCESSED) {
+ /* In this case, the module would have handled the config
+ * line, but some error occured while doing so. This error should
+ * already by reported by the module. We do not try any other
+ * modules on this line, because we found the right one.
+ * rgerhards, 2007-07-24
+ */
+ dbgprintf("error %d parsing config line\n", (int) iRet);
+ break;
+ }
+ pMod = module.GetNxtType(pMod, eMOD_OUT);
+ }
+
+ *ppAction = pAction;
+ RETiRet;
+}
+
+
+/* Process a configuration file line in traditional "filter selector" format
+ * or one that builds upon this format.
+ */
+static rsRetVal cflineClassic(uchar *p, selector_t **pfCurr)
+{
+ DEFiRet;
+ action_t *pAction;
+ selector_t *fCurr;
+
+ ASSERT(pfCurr != NULL);
+
+ fCurr = *pfCurr;
+
+ /* lines starting with '&' have no new filters and just add
+ * new actions to the currently processed selector.
+ */
+ if(*p == '&') {
+ ++p; /* eat '&' */
+ skipWhiteSpace(&p); /* on to command */
+ } else {
+ /* we are finished with the current selector (on previous line).
+ * So we now need to check
+ * if it has any actions associated and, if so, link it to the linked
+ * list. If it has nothing associated with it, we can simply discard
+ * it. In any case, we create a fresh selector for our new filter.
+ * We have one special case during initialization: then, the current
+ * selector is NULL, which means we do not need to care about it at
+ * all. -- rgerhards, 2007-08-01
+ */
+ CHKiRet(selectorAddList(fCurr));
+ CHKiRet(selectorConstruct(&fCurr)); /* create "fresh" selector */
+ CHKiRet(cflineDoFilter(&p, fCurr)); /* pull filters */
+ }
+
+ CHKiRet(cflineDoAction(&p, &pAction));
+ CHKiRet(llAppend(&fCurr->llActList, NULL, (void*) pAction));
+
+finalize_it:
+ *pfCurr = fCurr;
+ RETiRet;
+}
+
+
+/* process a configuration line
+ * I re-did this functon because it was desperately time to do so
+ * rgerhards, 2007-08-01
+ */
+static rsRetVal
+cfline(uchar *line, selector_t **pfCurr)
+{
+ DEFiRet;
+
+ ASSERT(line != NULL);
+
+ dbgprintf("cfline: '%s'\n", line);
+
+ /* check type of line and call respective processing */
+ switch(*line) {
+ case '!':
+ iRet = cflineProcessTagSelector(&line);
+ break;
+ case '+':
+ case '-':
+ iRet = cflineProcessHostSelector(&line);
+ break;
+ case '$':
+ ++line; /* eat '$' */
+ iRet = cfsysline(line);
+ break;
+ default:
+ iRet = cflineClassic(line, pfCurr);
+ break;
+ }
+
+ RETiRet;
+}
+
+
+/* queryInterface function
+ * rgerhards, 2008-02-29
+ */
+BEGINobjQueryInterface(conf)
+CODESTARTobjQueryInterface(conf)
+ if(pIf->ifVersion != confCURR_IF_VERSION) { /* check for current version, increment on each change */
+ ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
+ }
+
+ /* ok, we have the right interface, so let's fill it
+ * Please note that we may also do some backwards-compatibility
+ * work here (if we can support an older interface version - that,
+ * of course, also affects the "if" above).
+ */
+ pIf->doNameLine = doNameLine;
+ pIf->cfsysline = cfsysline;
+ pIf->doModLoad = doModLoad;
+ pIf->doIncludeLine = doIncludeLine;
+ pIf->cfline = cfline;
+ pIf->processConfFile = processConfFile;
+
+finalize_it:
+ENDobjQueryInterface(conf)
+
+
+/* exit our class
+ * rgerhards, 2008-03-11
+ */
+BEGINObjClassExit(conf, OBJ_IS_CORE_MODULE) /* CHANGE class also in END MACRO! */
+CODESTARTObjClassExit(conf)
+ /* release objects we no longer need */
+ objRelease(expr, CORE_COMPONENT);
+ objRelease(ctok, CORE_COMPONENT);
+ objRelease(ctok_token, CORE_COMPONENT);
+ objRelease(module, CORE_COMPONENT);
+ objRelease(errmsg, CORE_COMPONENT);
+ objRelease(net, LM_NET_FILENAME);
+ENDObjClassExit(conf)
+
+
+/* Initialize our class. Must be called as the very first method
+ * before anything else is called inside this class.
+ * rgerhards, 2008-02-29
+ */
+BEGINAbstractObjClassInit(conf, 1, OBJ_IS_CORE_MODULE) /* class, version - CHANGE class also in END MACRO! */
+ /* request objects we use */
+ CHKiRet(objUse(expr, CORE_COMPONENT));
+ CHKiRet(objUse(ctok, CORE_COMPONENT));
+ CHKiRet(objUse(ctok_token, CORE_COMPONENT));
+ CHKiRet(objUse(module, CORE_COMPONENT));
+ CHKiRet(objUse(errmsg, CORE_COMPONENT));
+ CHKiRet(objUse(net, LM_NET_FILENAME)); /* TODO: make this dependcy go away! */
+ENDObjClassInit(conf)
+
+/* vi:set ai:
+ */