/* ** Zabbix ** Copyright (C) 2001-2023 Zabbix SIA ** ** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. **/ #include "process_eventslog.h" #include "severity_constants.h" #include "../metrics.h" #include "../logfiles/logfiles.h" #include "zbxlog.h" #include "zbxregexp.h" #include "zbxstr.h" #include "zbx_item_constants.h" #include "zbxalgo.h" #include "zbxcomms.h" #include "zbxlog.h" #include /* StringCchPrintf */ #define EVENTLOG_REG_PATH TEXT("SYSTEM\\CurrentControlSet\\Services\\EventLog\\") /****************************************************************************** * * * Purpose: gets event message and parameter translation files from registry * * * * Parameters: szLogName - [IN] * * szSourceName - [IN] log source name * * pEventMessageFile - [OUT] * * pParamMessageFile - [OUT] * * * ******************************************************************************/ static void zbx_get_message_files(const wchar_t *szLogName, const wchar_t *szSourceName, wchar_t **pEventMessageFile, wchar_t **pParamMessageFile) { wchar_t buf[MAX_PATH]; HKEY hKey = NULL; DWORD szData = 0; /* Get path to message dll */ StringCchPrintf(buf, MAX_PATH, EVENTLOG_REG_PATH TEXT("%s\\%s"), szLogName, szSourceName); if (ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE, buf, 0, KEY_READ, &hKey)) return; if (ERROR_SUCCESS == RegQueryValueEx(hKey, TEXT("EventMessageFile"), NULL, NULL, NULL, &szData)) { *pEventMessageFile = zbx_malloc(*pEventMessageFile, szData); if (ERROR_SUCCESS != RegQueryValueEx(hKey, TEXT("EventMessageFile"), NULL, NULL, (unsigned char *)*pEventMessageFile, &szData)) { zbx_free(*pEventMessageFile); } } if (ERROR_SUCCESS == RegQueryValueEx(hKey, TEXT("ParameterMessageFile"), NULL, NULL, NULL, &szData)) { *pParamMessageFile = zbx_malloc(*pParamMessageFile, szData); if (ERROR_SUCCESS != RegQueryValueEx(hKey, TEXT("ParameterMessageFile"), NULL, NULL, (unsigned char *)*pParamMessageFile, &szData)) { zbx_free(*pParamMessageFile); } } RegCloseKey(hKey); } /****************************************************************************** * * * Purpose: Loads the specified message file, expanding environment variables * * in the file name if necessary. * * * * Parameters: szFileName - [IN] message file name * * * * Return value: handle to loaded library or NULL otherwise * * * ******************************************************************************/ static HINSTANCE zbx_load_message_file(const wchar_t *szFileName) { wchar_t *dll_name = NULL; long int sz, len = 0; HINSTANCE res = NULL; if (NULL == szFileName) return NULL; do { if (0 != (sz = len)) dll_name = zbx_realloc(dll_name, sz * sizeof(wchar_t)); len = ExpandEnvironmentStrings(szFileName, dll_name, sz); } while (0 != len && sz < len); if (0 != len) res = LoadLibraryEx(dll_name, NULL, LOAD_LIBRARY_AS_DATAFILE); zbx_free(dll_name); return res; } /****************************************************************************** * * * Purpose: extracts specified message from message file * * * * Parameters: hLib - [IN] message file handle * * dwMessageId - [IN] * * pInsertStrings - [IN] list of insert strings, optional * * * * Return value: formatted message converted to utf8 or NULL * * * * Comments: This function allocates memory for the returned message, which * * must be freed by the caller later. * * * ******************************************************************************/ static char *zbx_format_message(HINSTANCE hLib, DWORD dwMessageId, wchar_t **pInsertStrings) { wchar_t *pMsgBuf = NULL; char *message; if (0 == FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_ARGUMENT_ARRAY | FORMAT_MESSAGE_MAX_WIDTH_MASK, hLib, dwMessageId, MAKELANGID(LANG_NEUTRAL, SUBLANG_ENGLISH_US), (wchar_t *)&pMsgBuf, 0, (va_list *)pInsertStrings)) { return NULL; } message = zbx_unicode_to_utf8(pMsgBuf); zbx_rtrim(message, "\r\n "); LocalFree((HLOCAL)pMsgBuf); return message; } /****************************************************************************** * * * Purpose: translates message by replacing parameters %% with translated * * values * * * * Parameters: message - [IN/OUT] message to translate * * hLib - [IN] parameter message file handle * * * ******************************************************************************/ static void zbx_translate_message_params(char **message, HINSTANCE hLib) { char *param, *pstart, *pend; int dwMessageId; size_t offset = 0; while (1) { if (NULL == (pstart = strstr(*message + offset, "%%"))) break; pend = pstart + 2; dwMessageId = atoi(pend); while ('\0' != *pend && 0 != isdigit(*pend)) pend++; offset = pend - *message - 1; if (NULL != (param = zbx_format_message(hLib, dwMessageId, NULL))) { zbx_replace_string(message, pstart - *message, &offset, param); zbx_free(param); } } } /****************************************************************************** * * * Purpose: parses single Event Log record * * * * Parameters: wsource - [IN] Event Log file name * * pELR - [IN] buffer with single Event Log Record * * ... - [OUT] ELR detail * * * ******************************************************************************/ static void zbx_parse_eventlog_message(const wchar_t *wsource, const EVENTLOGRECORD *pELR, char **out_source, char **out_message, unsigned short *out_severity, unsigned long *out_timestamp, unsigned long *out_eventid) { #define MAX_INSERT_STRS 100 wchar_t *pEventMessageFile = NULL, *pParamMessageFile = NULL, *pFile = NULL, *pNextFile = NULL, *pCh, *aInsertStrings[MAX_INSERT_STRS]; HINSTANCE hLib = NULL, hParamLib = NULL; long i; int err; memset(aInsertStrings, 0, sizeof(aInsertStrings)); *out_message = NULL; *out_severity = pELR->EventType; /* return event type */ *out_timestamp = pELR->TimeGenerated; /* return timestamp */ *out_eventid = pELR->EventID & 0xffff; *out_source = zbx_unicode_to_utf8((wchar_t *)(pELR + 1)); /* copy source name */ /* get message file names */ zbx_get_message_files(wsource, (wchar_t *)(pELR + 1), &pEventMessageFile, &pParamMessageFile); /* prepare insert string array */ if (0 < pELR->NumStrings) { pCh = (wchar_t *)((unsigned char *)pELR + pELR->StringOffset); for (i = 0; i < pELR->NumStrings && i < MAX_INSERT_STRS; i++) { aInsertStrings[i] = pCh; pCh += wcslen(pCh) + 1; } } err = FAIL; for (pFile = pEventMessageFile; NULL != pFile && err != SUCCEED; pFile = pNextFile) { if (NULL != (pNextFile = wcschr(pFile, TEXT(';')))) { *pNextFile = '\0'; pNextFile++; } if (NULL != (hLib = zbx_load_message_file(pFile))) { if (NULL != (*out_message = zbx_format_message(hLib, pELR->EventID, aInsertStrings))) { err = SUCCEED; if (NULL != (hParamLib = zbx_load_message_file(pParamMessageFile))) { zbx_translate_message_params(out_message, hParamLib); FreeLibrary(hParamLib); } } FreeLibrary(hLib); } } zbx_free(pEventMessageFile); zbx_free(pParamMessageFile); if (SUCCEED != err) { *out_message = zbx_strdcatf(*out_message, "The description for Event ID:%lu in Source:'%s'" " cannot be found. The local computer may not have the necessary registry" " information or message DLL files to display messages from a remote computer.", *out_eventid, NULL == *out_source ? "" : *out_source); if (0 < pELR->NumStrings) { char *buf; *out_message = zbx_strdcat(*out_message, " The following information is part of the event: "); for (i = 0, pCh = (wchar_t *)((unsigned char *)pELR + pELR->StringOffset); i < pELR->NumStrings; i++, pCh += wcslen(pCh) + 1) { if (0 < i) *out_message = zbx_strdcat(*out_message, "; "); buf = zbx_unicode_to_utf8(pCh); *out_message = zbx_strdcat(*out_message, buf); zbx_free(buf); } } } zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__); #undef MAX_INSERT_STRS } /* opens event logger and returns number of records */ static int zbx_open_eventlog(LPCTSTR wsource, HANDLE *eventlog_handle, zbx_uint64_t *FirstID, zbx_uint64_t *LastID, DWORD *error_code) { wchar_t reg_path[MAX_PATH]; HKEY hk = NULL; DWORD dwNumRecords, dwOldestRecord; int ret = FAIL; zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__); *eventlog_handle = NULL; /* Get path to eventlog */ StringCchPrintf(reg_path, MAX_PATH, EVENTLOG_REG_PATH TEXT("%s"), wsource); if (ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE, reg_path, 0, KEY_READ, &hk)) { *error_code = GetLastError(); goto out; } RegCloseKey(hk); if (NULL == (*eventlog_handle = OpenEventLog(NULL, wsource))) /* open log file */ { *error_code = GetLastError(); goto out; } if (0 == GetNumberOfEventLogRecords(*eventlog_handle, &dwNumRecords) || 0 == GetOldestEventLogRecord(*eventlog_handle, &dwOldestRecord)) { *error_code = GetLastError(); CloseEventLog(*eventlog_handle); *eventlog_handle = NULL; goto out; } *FirstID = dwOldestRecord; *LastID = dwOldestRecord + dwNumRecords - 1; zabbix_log(LOG_LEVEL_DEBUG, "FirstID:" ZBX_FS_UI64 " LastID:" ZBX_FS_UI64 " numIDs:%lu", *FirstID, *LastID, dwNumRecords); ret = SUCCEED; out: zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret)); return ret; } /* close event logger */ static void zbx_close_eventlog(HANDLE eventlog_handle) { if (NULL != eventlog_handle) CloseEventLog(eventlog_handle); } /****************************************************************************** * * * Purpose: tries to set reading position in Event Log * * * * Parameters: eventlog_handle - [IN] handle to Event Log to be read * * FirstID - [IN] first Event Log record to be parsed * * ReadDirection - [IN] direction of reading: * * EVENTLOG_FORWARDS_READ or * * EVENTLOG_BACKWARDS_READ * * LastID - [IN] position of last record in Event Log * * eventlog_name - [IN] * * pELRs - [IN/OUT] buffer for reading Event Log data * * buffer_size - [IN/OUT] size of pELRs * * num_bytes_read - [OUT] number of bytes read from Event Log * * error_code - [OUT] (e.g. from ReadEventLog()) * * error - [OUT] error message in case of failure * * * * Return value: SUCCEED or FAIL * * * ******************************************************************************/ static int seek_eventlog(HANDLE *eventlog_handle, zbx_uint64_t FirstID, DWORD ReadDirection, zbx_uint64_t LastID, const char *eventlog_name, BYTE **pELRs, int *buffer_size, DWORD *num_bytes_read, DWORD *error_code, char **error) { DWORD dwRecordNumber, required_buf_size; zbx_uint64_t skip_count = 0; /* convert to DWORD to handle possible event record number wraparound */ dwRecordNumber = (DWORD)FirstID; *error_code = ERROR_SUCCESS; while (ERROR_SUCCESS == *error_code) { if (0 != ReadEventLog(eventlog_handle, EVENTLOG_SEEK_READ | EVENTLOG_FORWARDS_READ, dwRecordNumber, *pELRs, *buffer_size, num_bytes_read, &required_buf_size)) { return SUCCEED; } if (ERROR_INVALID_PARAMETER == (*error_code = GetLastError())) { /* See Microsoft Knowledge Base article, 177199 "BUG: ReadEventLog Fails with Error 87" */ /* how ReadEventLog() can fail with all valid parameters. */ /* Error code 87 is named ERROR_INVALID_PARAMETER. */ break; } if (ERROR_HANDLE_EOF == *error_code) return SUCCEED; if (ERROR_INSUFFICIENT_BUFFER == *error_code) { *buffer_size = required_buf_size; *pELRs = (BYTE *)zbx_realloc((void *)*pELRs, *buffer_size); *error_code = ERROR_SUCCESS; continue; } *error = zbx_dsprintf(*error, "Cannot read eventlog '%s': %s.", eventlog_name, zbx_strerror_from_system(*error_code)); return FAIL; } if (EVENTLOG_FORWARDS_READ == ReadDirection) { /* Error 87 when reading forwards is handled outside this function */ *error_code = ERROR_SUCCESS; return SUCCEED; } /* fallback implementation to deal with Error 87 when reading backwards */ if (ERROR_INVALID_PARAMETER == *error_code) { if (LastID == FirstID) skip_count = 1; else skip_count = LastID - FirstID; zabbix_log(LOG_LEVEL_DEBUG, "In %s(): fallback error_code=%d skip_count="ZBX_FS_UI64, __func__, *error_code, skip_count); } *error_code = ERROR_SUCCESS; while (0 < skip_count && ERROR_SUCCESS == *error_code) { BYTE *pEndOfRecords, *pELR; if (0 == ReadEventLog(eventlog_handle, EVENTLOG_SEQUENTIAL_READ | ReadDirection, 0, *pELRs, *buffer_size, num_bytes_read, &required_buf_size)) { if (ERROR_INSUFFICIENT_BUFFER == (*error_code = GetLastError())) { *error_code = ERROR_SUCCESS; *buffer_size = required_buf_size; *pELRs = (BYTE *)zbx_realloc((void *)*pELRs, *buffer_size); continue; } if (ERROR_HANDLE_EOF != *error_code) break; *error = zbx_dsprintf(*error, "Cannot read eventlog '%s': %s.", eventlog_name, zbx_strerror_from_system(*error_code)); return FAIL; } pELR = *pELRs; pEndOfRecords = *pELRs + *num_bytes_read; *num_bytes_read = 0; /* we can't reuse the buffer value because of the sort order */ while (pELR < pEndOfRecords) { if (0 == --skip_count) break; pELR += ((PEVENTLOGRECORD)pELR)->Length; } } if (ERROR_HANDLE_EOF == *error_code) *error_code = ERROR_SUCCESS; return SUCCEED; } /******************************************************************************** * * * Purpose: processes Event Log file in batch * * * * Parameters: addrs - [IN] vector for passing server and port * * where to send data * * agent2_result - [IN] address of buffer where to store * * matching log records (used only in * * Agent2) * * eventlog_name - [IN] * * regexps - [IN] set of regexp rules for Event Log test * * pattern - [IN] regular expression or global regular * * expression name (@). * * key_severity - [IN] severity of logged data sources * * key_source - [IN] name of logged data source * * key_logeventid - [IN] application-specific identifier for * * event * * rate - [IN] threshold of records count at a time * * process_value_cb - [IN] callback function for sending data to * * server * * config_tls - [IN] * * config_timeout - [IN] * * config_source_ip - [IN] * * config_hostname - [IN] * * config_buffer_send - [IN] * * config_buffer_size - [IN] * * metric - [IN/OUT] parameters for Event Log process * * lastlogsize_sent - [OUT] position of last record sent to * * server * * error - [OUT] error message in case of failure * * * * Return value: SUCCEED or FAIL * * * ********************************************************************************/ int process_eventslog(zbx_vector_addr_ptr_t *addrs, zbx_vector_ptr_t *agent2_result, const char *eventlog_name, zbx_vector_expression_t *regexps, const char *pattern, const char *key_severity, const char *key_source, const char *key_logeventid, int rate, zbx_process_value_func_t process_value_cb, const zbx_config_tls_t *config_tls, int config_timeout, const char *config_source_ip, const char *config_hostname, int config_buffer_send, int config_buffer_size, ZBX_ACTIVE_METRIC *metric, zbx_uint64_t *lastlogsize_sent, char **error) { #define EVT_LOG_ITEM 0 #define EVT_LOG_COUNT_ITEM 1 HANDLE eventlog_handle = NULL; wchar_t *eventlog_name_w; zbx_uint64_t FirstID, LastID, lastlogsize; DWORD num_bytes_read = 0, required_buf_size, ReadDirection, error_code; BYTE *pELRs = NULL; int ret = FAIL, send_err = SUCCEED, match = SUCCEED, buffer_size = 64 * ZBX_KIBIBYTE, s_count, p_count, evt_item_type; unsigned long timestamp = 0; char *source; lastlogsize = metric->lastlogsize; zabbix_log(LOG_LEVEL_DEBUG, "In %s() source:'%s' lastlogsize:" ZBX_FS_UI64, __func__, eventlog_name, lastlogsize); /* From MSDN documentation: */ /* The RecordNumber member of EVENTLOGRECORD contains the record number for the Event Log record. */ /* The very first record written to an Event Log is record number 1, and other records are */ /* numbered sequentially. If the record number reaches ULONG_MAX, the next record number will be 0, */ /* not 1; however, you use zero to seek to the record. */ /* */ /* This RecordNumber wraparound is handled simply by using 64bit integer to calculate record */ /* numbers and then converting to DWORD values. */ if (0 != (ZBX_METRIC_FLAG_LOG_COUNT & metric->flags)) evt_item_type = EVT_LOG_COUNT_ITEM; else evt_item_type = EVT_LOG_ITEM; if (NULL == eventlog_name || '\0' == *eventlog_name) { *error = zbx_strdup(*error, "Cannot open eventlog with empty name."); return ret; } eventlog_name_w = zbx_utf8_to_unicode(eventlog_name); if (SUCCEED != zbx_open_eventlog(eventlog_name_w, &eventlog_handle, &FirstID, &LastID, &error_code)) { *error = zbx_dsprintf(*error, "Cannot open eventlog '%s': %s.", eventlog_name, zbx_strerror_from_system(error_code)); goto out; } if (1 == metric->skip_old_data) { metric->lastlogsize = lastlogsize = LastID; metric->skip_old_data = 0; zabbix_log(LOG_LEVEL_DEBUG, "skipping existing data: lastlogsize:" ZBX_FS_UI64, metric->lastlogsize); goto finish; } /* Having lastlogsize greater than LastID means that there was oldest event record */ /* (FirstID) wraparound. In this case we must also wrap the lastlogsize value. */ if (lastlogsize > LastID) lastlogsize = (DWORD)lastlogsize; ReadDirection = ((LastID - FirstID) / 2) > lastlogsize ? EVENTLOG_FORWARDS_READ : EVENTLOG_BACKWARDS_READ; /* if the lastlogsize is still outside log record interval reset it to the oldest record number, */ /* otherwise set FirstID to the next record after lastlogsize, which is the first event record */ /* to read */ if (lastlogsize > LastID || lastlogsize < FirstID) { lastlogsize = FirstID; ReadDirection = 0; } else FirstID = lastlogsize + 1; pELRs = (BYTE*)zbx_malloc((void *)pELRs, buffer_size); if (0 == ReadDirection) /* read eventlog from the first record */ { error_code = ERROR_SUCCESS; } else if (LastID < FirstID) /* no new records */ { error_code = ERROR_HANDLE_EOF; } else if (SUCCEED != seek_eventlog(eventlog_handle, FirstID, ReadDirection, LastID, eventlog_name, &pELRs, &buffer_size, &num_bytes_read, &error_code, error)) { goto out; } zabbix_log(LOG_LEVEL_TRACE, "%s(): state before EventLog reading: num_bytes_read=%u error=%s FirstID=" ZBX_FS_UI64 " LastID=" ZBX_FS_UI64 " lastlogsize=" ZBX_FS_UI64, __func__, (unsigned int)num_bytes_read, zbx_strerror_from_system(error_code), FirstID, LastID, lastlogsize); if (ERROR_HANDLE_EOF == error_code) goto finish; s_count = 0; p_count = 0; /* Read blocks of records until you reach the end of the log or an */ /* error occurs. The records are read from oldest to newest. If the buffer */ /* is not big enough to hold a complete event record, reallocate the buffer. */ while (ERROR_SUCCESS == error_code) { BYTE *pELR, *pEndOfRecords; if (0 == num_bytes_read && 0 == ReadEventLog(eventlog_handle, EVENTLOG_SEQUENTIAL_READ | EVENTLOG_FORWARDS_READ, 0, pELRs, buffer_size, &num_bytes_read, &required_buf_size)) { if (ERROR_INSUFFICIENT_BUFFER == (error_code = GetLastError())) { error_code = ERROR_SUCCESS; buffer_size = required_buf_size; pELRs = (BYTE *)zbx_realloc((void *)pELRs, buffer_size); continue; } if (ERROR_HANDLE_EOF == error_code) break; *error = zbx_dsprintf(*error, "Cannot read eventlog '%s': %s.", eventlog_name, zbx_strerror_from_system(error_code)); goto out; } pELR = pELRs; pEndOfRecords = pELR + num_bytes_read; zabbix_log(LOG_LEVEL_TRACE, "%s(): state before buffer parsing: num_bytes_read = %u RecordNumber = %d" "FirstID = "ZBX_FS_UI64" LastID = "ZBX_FS_UI64" lastlogsize="ZBX_FS_UI64, __func__, (unsigned int)num_bytes_read, ((PEVENTLOGRECORD)pELR)->RecordNumber, FirstID, LastID, lastlogsize); num_bytes_read = 0; while (pELR < pEndOfRecords) { /* to prevent mismatch in comparing with RecordNumber in case of wrap-around, */ /* we look for using '=' */ if (0 != timestamp || (DWORD)FirstID == ((PEVENTLOGRECORD)pELR)->RecordNumber) { const char *str_severity; unsigned short severity; unsigned long logeventid; char *value, str_logeventid[8]; /* increase counter only for records >= FirstID (start point for the search) */ /* to avoid wrap-around of the 32b RecordNumber we increase the 64b lastlogsize */ if (0 == timestamp) lastlogsize = FirstID; else lastlogsize += 1; zbx_parse_eventlog_message(eventlog_name_w, (EVENTLOGRECORD *)pELR, &source, &value, &severity, ×tamp, &logeventid); switch (severity) { case EVENTLOG_SUCCESS: case EVENTLOG_INFORMATION_TYPE: severity = ITEM_LOGTYPE_INFORMATION; str_severity = INFORMATION_TYPE; break; case EVENTLOG_WARNING_TYPE: severity = ITEM_LOGTYPE_WARNING; str_severity = WARNING_TYPE; break; case EVENTLOG_ERROR_TYPE: severity = ITEM_LOGTYPE_ERROR; str_severity = ERROR_TYPE; break; case EVENTLOG_AUDIT_FAILURE: severity = ITEM_LOGTYPE_FAILURE_AUDIT; str_severity = AUDIT_FAILURE; break; case EVENTLOG_AUDIT_SUCCESS: severity = ITEM_LOGTYPE_SUCCESS_AUDIT; str_severity = AUDIT_SUCCESS; break; default: *error = zbx_dsprintf(*error, "Invalid severity detected: '%hu'.", severity); goto out; } zbx_snprintf(str_logeventid, sizeof(str_logeventid), "%lu", logeventid); if (0 == p_count) { int ret1 = ZBX_REGEXP_NO_MATCH, ret2 = ZBX_REGEXP_NO_MATCH, ret3 = ZBX_REGEXP_NO_MATCH, ret4 = ZBX_REGEXP_NO_MATCH; if (FAIL == (ret1 = zbx_regexp_match_ex(regexps, value, pattern, ZBX_CASE_SENSITIVE))) { *error = zbx_strdup(*error, "Invalid regular expression in the second parameter."); match = FAIL; } else if (FAIL == (ret2 = zbx_regexp_match_ex(regexps, str_severity, key_severity, ZBX_IGNORE_CASE))) { *error = zbx_strdup(*error, "Invalid regular expression in the third parameter."); match = FAIL; } else if (FAIL == (ret3 = zbx_regexp_match_ex(regexps, source, key_source, ZBX_IGNORE_CASE))) { *error = zbx_strdup(*error, "Invalid regular expression in the fourth parameter."); match = FAIL; } else if (FAIL == (ret4 = zbx_regexp_match_ex(regexps, str_logeventid, key_logeventid, ZBX_CASE_SENSITIVE))) { *error = zbx_strdup(*error, "Invalid regular expression in the fifth parameter."); match = FAIL; } if (FAIL == match) { zbx_free(source); zbx_free(value); ret = FAIL; break; } else { match = ZBX_REGEXP_MATCH == ret1 && ZBX_REGEXP_MATCH == ret2 && ZBX_REGEXP_MATCH == ret3 && ZBX_REGEXP_MATCH == ret4; } } else { match = ZBX_REGEXP_MATCH == zbx_regexp_match_ex(regexps, value, pattern, ZBX_CASE_SENSITIVE) && ZBX_REGEXP_MATCH == zbx_regexp_match_ex(regexps, str_severity, key_severity, ZBX_IGNORE_CASE) && ZBX_REGEXP_MATCH == zbx_regexp_match_ex(regexps, source, key_source, ZBX_IGNORE_CASE) && ZBX_REGEXP_MATCH == zbx_regexp_match_ex(regexps, str_logeventid, key_logeventid, ZBX_CASE_SENSITIVE); } if (1 == match) { if (EVT_LOG_ITEM == evt_item_type) { send_err = process_value_cb(addrs, agent2_result, config_hostname, metric->key_orig, value, ITEM_STATE_NORMAL, &lastlogsize, NULL, ×tamp, source, &severity, &logeventid, metric->flags | ZBX_METRIC_FLAG_PERSISTENT, config_tls, config_timeout, config_source_ip, config_buffer_send, config_buffer_size); if (SUCCEED == send_err) { *lastlogsize_sent = lastlogsize; s_count++; } } else s_count++; } p_count++; zbx_free(source); zbx_free(value); if (EVT_LOG_ITEM == evt_item_type) { if (SUCCEED == send_err) { metric->lastlogsize = lastlogsize; } else { /* buffer is full, stop processing active checks */ /* till the buffer is cleared */ break; } } /* do not flood Zabbix server if file grows too fast */ if (s_count >= (rate * metric->refresh)) break; /* do not flood local system if file grows too fast */ if (p_count >= (4 * rate * metric->refresh)) break; } pELR += ((PEVENTLOGRECORD)pELR)->Length; } if (pELR < pEndOfRecords) error_code = ERROR_NO_MORE_ITEMS; } finish: ret = SUCCEED; if (EVT_LOG_COUNT_ITEM == evt_item_type) { char buf[ZBX_MAX_UINT64_LEN]; zbx_snprintf(buf, sizeof(buf), "%d", s_count); send_err = process_value_cb(addrs, agent2_result, config_hostname, metric->key_orig, buf, ITEM_STATE_NORMAL, &lastlogsize, NULL, NULL, NULL, NULL, NULL, metric->flags | ZBX_METRIC_FLAG_PERSISTENT, config_tls, config_timeout, config_source_ip, config_buffer_send, config_buffer_size); if (SUCCEED == send_err) { *lastlogsize_sent = lastlogsize; metric->lastlogsize = lastlogsize; } } out: zbx_close_eventlog(eventlog_handle); zbx_free(eventlog_name_w); zbx_free(pELRs); zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __func__, zbx_result_string(ret)); return ret; #undef EVT_LOG_COUNT_ITEM #undef EVT_LOG_ITEM }