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|
/*
** Zabbix
** Copyright (C) 2001-2014 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 "common.h"
#include "log.h"
#include "eventlog.h"
#define DEFAULT_EVENT_CONTENT_SIZE 256
static LPCWSTR RENDER_ITEMS[] = {
L"/Event/System/Provider/@Name",
L"/Event/System/Provider/@EventSourceName",
L"/Event/System/EventRecordID",
L"/Event/System/EventID",
L"/Event/System/Level",
L"/Event/System/Keywords",
L"/Event/System/TimeCreated/@SystemTime",
L"Event/EventData/Data"
};
#define RENDER_ITEMS_COUNT (sizeof(RENDER_ITEMS) / sizeof(LPCWSTR))
#define VAR_PROVIDER_NAME(p) (p[0].StringVal)
#define VAR_SOURCE_NAME(p) (p[1].StringVal)
#define VAR_RECORD_NUMBER(p) (p[2].UInt64Val)
#define VAR_EVENT_ID(p) (p[3].UInt16Val)
#define VAR_LEVEL(p) (p[4].ByteVal)
#define VAR_KEYWORDS(p) (p[5].UInt64Val)
#define VAR_TIME_CREATED(p) (p[6].FileTimeVal)
#define EVENTLOG_REG_PATH TEXT("SYSTEM\\CurrentControlSet\\Services\\EventLog\\")
/* open event logger and return number of records */
static int zbx_open_eventlog(LPCTSTR wsource, HANDLE *eventlog_handle, zbx_uint64_t *pNumRecords,
zbx_uint64_t *pLatestRecord)
{
const char *__function_name = "zbx_open_eventlog";
TCHAR reg_path[MAX_PATH];
HKEY hk = NULL;
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
*eventlog_handle = NULL;
*pNumRecords = 0;
*pLatestRecord = 0;
/* Get path to eventlog */
zbx_wsnprintf(reg_path, MAX_PATH, EVENTLOG_REG_PATH TEXT("%s"), wsource);
if (ERROR_SUCCESS != RegOpenKeyEx(HKEY_LOCAL_MACHINE, reg_path, 0, KEY_READ, &hk))
goto out;
RegCloseKey(hk);
if (NULL == (*eventlog_handle = OpenEventLog(NULL, wsource))) /* open log file */
goto out;
if (0 == GetNumberOfEventLogRecords(*eventlog_handle, (unsigned long*)pNumRecords)) /* get number of records */
goto out;
if (0 == GetOldestEventLogRecord(*eventlog_handle, (unsigned long*)pLatestRecord))
goto out;
zabbix_log(LOG_LEVEL_DEBUG, "%s() pNumRecords:%ld pLatestRecord:%ld",
__function_name, *pNumRecords, *pLatestRecord);
ret = SUCCEED;
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/* close event logger */
static int zbx_close_eventlog(HANDLE eventlog_handle)
{
if (NULL != eventlog_handle)
CloseEventLog(eventlog_handle);
return SUCCEED;
}
/******************************************************************************
* *
* Function: zbx_get_message_files *
* *
* Purpose: gets event message and parameter translation files from registry *
* *
* Parameters: szLogName - [IN] the log name *
* szSourceName - [IN] the log source name *
* pEventMessageFile - [OUT] the event message file *
* pParamMessageFile - [OUT] the parameter message file *
* *
******************************************************************************/
static void zbx_get_message_files(LPCTSTR szLogName, LPCTSTR szSourceName, LPTSTR *pEventMessageFile,
LPTSTR *pParamMessageFile)
{
TCHAR buf[MAX_PATH];
HKEY hKey = NULL;
DWORD szData;
/* Get path to message dll */
zbx_wsnprintf(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,
(LPBYTE)*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,
(LPBYTE)*pParamMessageFile, &szData))
{
zbx_free(*pParamMessageFile);
}
}
RegCloseKey(hKey);
}
/******************************************************************************
* *
* Function: zbx_load_message_file *
* *
* Purpose: load the specified message file, expanding environment variables *
* in the file name if necessary *
* *
* Parameters: szFileName - [IN] the message file name *
* *
* Return value: Handle to the loaded library or NULL otherwise *
* *
******************************************************************************/
static HINSTANCE zbx_load_message_file(LPCTSTR szFileName)
{
TCHAR MsgDll[MAX_PATH];
if (NULL == szFileName || 0 == ExpandEnvironmentStrings(szFileName, MsgDll, MAX_PATH))
return NULL;
return LoadLibraryEx(MsgDll, NULL, LOAD_LIBRARY_AS_DATAFILE);
}
/******************************************************************************
* *
* Function: zbx_format_message *
* *
* Purpose: extracts the specified message from a message file *
* *
* Parameters: hLib - [IN] the message file handle *
* dwMessageId - [IN] the message identifier *
* pInsertStrings - [IN] a list of insert strings, optional *
* *
* Return value: The 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, LPTSTR *pInsertStrings)
{
LPTSTR pMsgBuf = NULL;
char *message;
if (0 == FormatMessage(FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_ARGUMENT_ARRAY | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_MAX_WIDTH_MASK,
hLib, dwMessageId, MAKELANGID(LANG_NEUTRAL, SUBLANG_ENGLISH_US), (LPTSTR)&pMsgBuf, 0,
(va_list *)pInsertStrings))
{
return NULL;
}
message = zbx_unicode_to_utf8(pMsgBuf);
zbx_rtrim(message, "\r\n ");
LocalFree((HLOCAL)pMsgBuf);
return message;
}
/******************************************************************************
* *
* Function: zbx_translate_message_params *
* *
* Purpose: translates message by replacing parameters %%<id> with translated *
* values *
* *
* Parameters: message - [IN/OUT] the message to translate *
* hLib - [IN] the 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);
}
}
}
/* get Nth error from event log. 1 is the first. */
static int zbx_get_eventlog_message(LPCTSTR wsource, HANDLE eventlog_handle, long which, char **out_source,
char **out_message, unsigned short *out_severity, unsigned long *out_timestamp,
unsigned long *out_eventid)
{
const char *__function_name = "zbx_get_eventlog_message";
int buffer_size = 512;
EVENTLOGRECORD *pELR = NULL;
DWORD dwRead, dwNeeded, dwErr;
LPTSTR pEventMessageFile = NULL, pParamMessageFile = NULL, pFile = NULL, pNextFile = NULL, pCh,
*pInsertStrings = NULL;
HINSTANCE hLib = NULL, hParamLib = NULL;
long i, err = 0;
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() which:%ld", __function_name, which);
*out_source = NULL;
*out_message = NULL;
*out_severity = 0;
*out_timestamp = 0;
*out_eventid = 0;
pELR = (EVENTLOGRECORD *)zbx_malloc((void *)pELR, buffer_size);
while (0 == ReadEventLog(eventlog_handle, EVENTLOG_SEEK_READ | EVENTLOG_FORWARDS_READ, which,
pELR, buffer_size, &dwRead, &dwNeeded))
{
if (ERROR_INSUFFICIENT_BUFFER != (dwErr = GetLastError()))
{
zabbix_log(LOG_LEVEL_DEBUG, "%s(): %s", __function_name, strerror_from_system(dwErr));
goto out;
}
buffer_size = dwNeeded;
pELR = (EVENTLOGRECORD *)zbx_realloc((void *)pELR, buffer_size);
}
*out_severity = pELR->EventType; /* return event type */
*out_timestamp = pELR->TimeGenerated; /* return timestamp */
*out_eventid = pELR->EventID & 0xffff;
*out_source = zbx_unicode_to_utf8((LPTSTR)(pELR + 1)); /* copy source name */
/* get message file names */
zbx_get_message_files(wsource, (LPTSTR)(pELR + 1), &pEventMessageFile, &pParamMessageFile);
/* prepare insert string array */
if (0 < pELR->NumStrings)
{
pInsertStrings = zbx_malloc(NULL, sizeof(LPWSTR) * pELR->NumStrings);
pCh = (LPWSTR)((LPBYTE)pELR + pELR->StringOffset);
for (i = 0; i < pELR->NumStrings; i++)
{
pInsertStrings[i] = pCh;
pCh += zbx_strlen(pCh) + 1;
}
}
err = FAIL;
for (pFile = pEventMessageFile; NULL != pFile && err != SUCCEED; pFile = pNextFile)
{
if (NULL != (pNextFile = zbx_strchr(pFile, ';')))
{
*pNextFile = '\0';
pNextFile++;
}
if (NULL != (hLib = zbx_load_message_file(pFile)))
{
if (NULL != (*out_message = zbx_format_message(hLib, pELR->EventID, pInsertStrings)))
{
err = SUCCEED;
if (NULL != (hParamLib = zbx_load_message_file(pParamMessageFile)))
{
zbx_translate_message_params(out_message, hParamLib);
FreeLibrary(hParamLib);
}
}
FreeLibrary(hLib);
}
}
zbx_free(pInsertStrings);
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 = (LPWSTR)((LPBYTE)pELR + pELR->StringOffset);
i < pELR->NumStrings;
i++, pCh += zbx_strlen(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);
}
}
}
ret = SUCCEED;
out:
zbx_free(pELR);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
int process_eventlog(const char *source, zbx_uint64_t *lastlogsize, unsigned long *out_timestamp,
char **out_source, unsigned short *out_severity, char **out_message,
unsigned long *out_eventid, unsigned char skip_old_data)
{
const char *__function_name = "process_eventlog";
int ret = FAIL;
static HMODULE hmod_wevtapi = NULL;
HANDLE eventlog_handle;
LPTSTR wsource;
zbx_uint64_t FirstID, LastID;
register long i;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() source:'%s' lastlogsize:" ZBX_FS_UI64,
__function_name, source, *lastlogsize);
*out_timestamp = 0;
*out_source = NULL;
*out_severity = 0;
*out_message = NULL;
*out_eventid = 0;
if (NULL == source || '\0' == *source)
{
zabbix_log(LOG_LEVEL_WARNING, "cannot open eventlog with empty name");
return ret;
}
wsource = zbx_utf8_to_unicode(source);
if (SUCCEED == zbx_open_eventlog(wsource, &eventlog_handle,
&LastID /* number */, &FirstID /* oldest */))
{
LastID += FirstID;
if (1 == skip_old_data)
{
*lastlogsize = LastID - 1;
zabbix_log(LOG_LEVEL_DEBUG, "skipping existing data: lastlogsize:" ZBX_FS_UI64, *lastlogsize);
}
if (*lastlogsize > LastID)
*lastlogsize = FirstID;
else if (*lastlogsize >= FirstID)
FirstID = (long)*lastlogsize + 1;
for (i = (long)FirstID; i < LastID; i++)
{
if (SUCCEED == zbx_get_eventlog_message(wsource, eventlog_handle, i, out_source, out_message,
out_severity, out_timestamp, out_eventid))
{
*lastlogsize = i;
break;
}
}
zbx_close_eventlog(eventlog_handle);
ret = SUCCEED;
}
else
zabbix_log(LOG_LEVEL_ERR, "cannot open eventlog '%s': %s", source,
strerror_from_system(GetLastError()));
zbx_free(wsource);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/* open eventlog using API 6 and return the number of records */
static int zbx_open_eventlog6(LPCWSTR wsource, zbx_uint64_t *lastlogsize, EVT_HANDLE *render_context,
zbx_uint64_t *FirstID, zbx_uint64_t *LastID)
{
const char *__function_name = "zbx_open_eventlog6";
EVT_HANDLE log = NULL;
EVT_VARIANT var;
EVT_HANDLE tmp_all_event_query = NULL;
EVT_HANDLE event_bookmark = NULL;
EVT_VARIANT* renderedContent = NULL;
DWORD status = 0;
DWORD size_required = 0;
DWORD size = DEFAULT_EVENT_CONTENT_SIZE;
DWORD bookmarkedCount = 0;
zbx_uint64_t numIDs = 0;
LPSTR tmp_str = NULL;
int ret = FAIL;
*FirstID = 0;
*LastID = 0;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
/* try to open the desired log */
if (NULL == (log = EvtOpenLog(NULL, wsource, EvtOpenChannelPath)))
{
tmp_str = zbx_unicode_to_utf8(wsource);
zabbix_log(LOG_LEVEL_WARNING, "cannot open eventlog '%s':%s", tmp_str,
strerror_from_system(GetLastError()));
goto finish;
}
/* obtain the number of records in the log */
if (TRUE != EvtGetLogInfo(log, EvtLogNumberOfLogRecords, sizeof(var), &var, &size_required))
{
zabbix_log(LOG_LEVEL_WARNING, "EvtGetLogInfo failed:%s",
strerror_from_system(GetLastError()));
goto finish;
}
numIDs = var.UInt64Val;
/* get the number of the oldest record in the log */
/* "EvtGetLogInfo()" does not work properly with "EvtLogOldestRecordNumber" */
/* we have to get it from the first EventRecordID */
/* create the system render */
if (NULL == (*render_context = EvtCreateRenderContext(RENDER_ITEMS_COUNT, RENDER_ITEMS, EvtRenderContextValues)))
{
zabbix_log(LOG_LEVEL_WARNING, "EvtCreateRenderContext failed:%s", strerror_from_system(GetLastError()));
goto finish;
}
/* get all eventlog */
tmp_all_event_query = EvtQuery(NULL, wsource, NULL, EvtQueryChannelPath);
if (NULL == tmp_all_event_query)
{
if (ERROR_EVT_CHANNEL_NOT_FOUND == (status = GetLastError()))
zabbix_log(LOG_LEVEL_WARNING, "EvtQuery channel missed:%s", strerror_from_system(status));
else
zabbix_log(LOG_LEVEL_WARNING, "EvtQuery failed:%s", strerror_from_system(status));
goto finish;
}
/* get the entries and allocate the required space */
renderedContent = zbx_malloc(renderedContent, size);
if (TRUE != EvtNext(tmp_all_event_query, 1, &event_bookmark, INFINITE, 0, &size_required))
{
/* no data in eventlog */
zabbix_log(LOG_LEVEL_DEBUG, "first EvtNext failed:%s", strerror_from_system(GetLastError()));
*FirstID = 1;
*LastID = 1;
numIDs = 0;
*lastlogsize = 0;
ret = SUCCEED;
goto finish;
}
/* obtain the information from selected events */
if (TRUE != EvtRender(*render_context, event_bookmark, EvtRenderEventValues, size, renderedContent,
&size_required, &bookmarkedCount))
{
/* information exceeds the allocated space */
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
zabbix_log(LOG_LEVEL_WARNING, "EvtRender failed:%s", strerror_from_system(GetLastError()));
goto finish;
}
renderedContent = (EVT_VARIANT*)zbx_realloc((void *)renderedContent, size_required);
size = size_required;
if (TRUE != EvtRender(*render_context, event_bookmark, EvtRenderEventValues, size, renderedContent,
&size_required, &bookmarkedCount))
{
zabbix_log(LOG_LEVEL_WARNING, "EvtRender failed:%s", strerror_from_system(GetLastError()));
goto finish;
}
}
*FirstID = VAR_RECORD_NUMBER(renderedContent);
*LastID = *FirstID + numIDs;
if (*lastlogsize >= *LastID)
{
*lastlogsize = *FirstID - 1;
zabbix_log(LOG_LEVEL_DEBUG, "lastlogsize is too big. It is set to:" ZBX_FS_UI64, *lastlogsize);
}
ret = SUCCEED;
finish:
if (NULL != log)
EvtClose(log);
if (NULL != tmp_all_event_query)
EvtClose(tmp_all_event_query);
if (NULL != event_bookmark)
EvtClose(event_bookmark);
zbx_free(tmp_str);
zbx_free(renderedContent);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s FirstID:" ZBX_FS_UI64 " LastID:" ZBX_FS_UI64 " numIDs:" ZBX_FS_UI64,
__function_name, zbx_result_string(ret), *FirstID, *LastID, numIDs);
return ret;
}
/* get handles of eventlog */
static int zbx_get_handle_eventlog6(LPCWSTR wsource, zbx_uint64_t *lastlogsize, EVT_HANDLE *query)
{
const char *__function_name = "zbx_get_handle_eventlog6";
LPWSTR event_query = NULL;
DWORD status = 0;
LPSTR tmp_str = NULL;
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s(), previous lastlogsize:" ZBX_FS_UI64, __function_name, *lastlogsize);
/* start building the query */
tmp_str = zbx_dsprintf(NULL, "Event/System[EventRecordID>%ld]", *lastlogsize);
event_query = zbx_utf8_to_unicode(tmp_str);
/* create massive query for an event on a local computer*/
*query = EvtQuery(NULL, wsource, event_query, EvtQueryChannelPath);
if (NULL == *query)
{
if (ERROR_EVT_CHANNEL_NOT_FOUND == (status = GetLastError()))
zabbix_log(LOG_LEVEL_WARNING, "EvtQuery channel missed:%s", strerror_from_system(status));
else
zabbix_log(LOG_LEVEL_WARNING, "EvtQuery failed:%s", strerror_from_system(status));
goto finish;
}
ret = SUCCEED;
finish:
zbx_free(tmp_str);
zbx_free(event_query);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/* initialize event logs with Windows API version 6 */
int initialize_eventlog6(const char *source, zbx_uint64_t *lastlogsize, zbx_uint64_t *FirstID,
zbx_uint64_t *LastID, EVT_HANDLE *render_context, EVT_HANDLE *query)
{
const char *__function_name = "initialize_eventlog6";
LPWSTR wsource = NULL;
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() source:'%s' previous lastlogsize:%ld",
__function_name, source, *lastlogsize);
if (NULL == source || '\0' == *source)
{
zabbix_log(LOG_LEVEL_WARNING, "cannot open eventlog with empty name.");
goto finish;
}
wsource = zbx_utf8_to_unicode(source);
if (SUCCEED != zbx_open_eventlog6(wsource, lastlogsize, render_context, FirstID, LastID))
{
zabbix_log(LOG_LEVEL_ERR, "cannot open eventlog '%s'", source);
goto finish;
}
if (SUCCEED != zbx_get_handle_eventlog6(wsource, lastlogsize, query))
{
zabbix_log(LOG_LEVEL_ERR, "cannot get eventlog handle '%s'", source);
goto finish;
}
ret = SUCCEED;
finish:
zbx_free(wsource);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/* expand the string message from a specific event handler */
static LPSTR expand_message6(LPCWSTR pname, EVT_HANDLE event)
{
const char *__function_name = "expand_message6";
LPWSTR pmessage = NULL;
EVT_HANDLE provider = NULL;
DWORD require = 0;
LPSTR out_message = NULL;
LPSTR tmp_pname = NULL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
if (NULL == (provider = EvtOpenPublisherMetadata(NULL, pname, NULL, 0, 0)))
{
tmp_pname = zbx_unicode_to_utf8(pname);
zabbix_log(LOG_LEVEL_DEBUG, "provider '%s' could not be opened: %s",
strerror_from_system(GetLastError()), tmp_pname);
zbx_free(tmp_pname);
goto finish;
}
if (TRUE != EvtFormatMessage(provider, event, 0, 0, NULL, EvtFormatMessageEvent, 0, NULL, &require) )
{
if (ERROR_INSUFFICIENT_BUFFER == GetLastError())
{
pmessage = zbx_malloc(pmessage, sizeof(WCHAR) * require);
if (TRUE != EvtFormatMessage(provider, event, 0, 0, NULL, EvtFormatMessageEvent,
require, pmessage, &require))
{
zabbix_log(LOG_LEVEL_DEBUG, "formatting message failed: %s",
strerror_from_system(GetLastError()));
goto finish;
}
out_message = zbx_unicode_to_utf8(pmessage);
}
}
finish:
if (NULL != provider)
EvtClose(provider);
zbx_free(pmessage);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, out_message);
/* should be freed*/
return out_message;
}
/* obtain a particular message from a desired eventlog */
static int zbx_get_eventlog_message6(LPCWSTR wsource, zbx_uint64_t *which, unsigned short *out_severity,
unsigned long *out_timestamp, char **out_provider, char **out_source, char **out_message,
unsigned long *out_eventid, EVT_HANDLE *render_context, EVT_HANDLE *query, zbx_uint64_t *keywords)
{
const char *__function_name = "zbx_get_eventlog_message6";
EVT_HANDLE event_bookmark = NULL;
EVT_VARIANT* renderedContent = NULL;
LPCWSTR pprovider = NULL;
LPSTR tmp_str = NULL;
DWORD size = DEFAULT_EVENT_CONTENT_SIZE;
DWORD bookmarkedCount = 0;
DWORD require = 0;
const zbx_uint64_t sec_1970 = 116444736000000000;
const zbx_uint64_t success_audit = 0x20000000000000;
const zbx_uint64_t failure_audit = 0x10000000000000;
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() lastlogsize:" ZBX_FS_UI64, __function_name, *which);
if (NULL == *query)
{
zabbix_log(LOG_LEVEL_DEBUG, "no EvtQuery handle");
goto finish;
}
/* get the entries and allocate required space */
renderedContent = zbx_malloc(renderedContent, size);
if (TRUE != EvtNext(*query, 1, &event_bookmark, INFINITE, 0, &require))
{
zabbix_log(LOG_LEVEL_WARNING, "EvtNext failed: %s, lastlogsize:" ZBX_FS_UI64,
strerror_from_system(GetLastError()), *which);
goto finish;
}
/* obtain the information from the selected events */
if (TRUE != EvtRender(*render_context, event_bookmark, EvtRenderEventValues, size, renderedContent,
&require, &bookmarkedCount) )
{
/* information exceeds the space allocated */
if (ERROR_INSUFFICIENT_BUFFER != GetLastError())
{
zabbix_log(LOG_LEVEL_WARNING, "EvtRender failed: %s", strerror_from_system(GetLastError()));
goto finish;
}
renderedContent = (EVT_VARIANT*)zbx_realloc((void *)renderedContent, require);
size = require;
if (TRUE != EvtRender(*render_context, event_bookmark, EvtRenderEventValues, size, renderedContent,
&require, &bookmarkedCount))
{
zabbix_log(LOG_LEVEL_WARNING, "EvtRender failed: %s", strerror_from_system(GetLastError()));
goto finish;
}
}
pprovider = VAR_PROVIDER_NAME(renderedContent);
*out_provider = zbx_unicode_to_utf8(pprovider);
if (NULL != VAR_SOURCE_NAME(renderedContent))
{
*out_source = zbx_unicode_to_utf8(VAR_SOURCE_NAME(renderedContent));
}
*keywords = VAR_KEYWORDS(renderedContent) & (success_audit | failure_audit);
*out_severity = VAR_LEVEL(renderedContent);
*out_timestamp = (unsigned long)((VAR_TIME_CREATED(renderedContent) - sec_1970) / 10000000);
*out_eventid = VAR_EVENT_ID(renderedContent);
*out_message = expand_message6(pprovider, event_bookmark);
tmp_str = zbx_unicode_to_utf8(wsource);
if (VAR_RECORD_NUMBER(renderedContent) != *which)
{
zabbix_log(LOG_LEVEL_DEBUG, "Overwriting expected EventRecordID:" ZBX_FS_UI64 " with the real"
" EventRecordID:" ZBX_FS_UI64 " in eventlog '%s'", *which,
VAR_RECORD_NUMBER(renderedContent), tmp_str);
*which = VAR_RECORD_NUMBER(renderedContent);
}
/* some events dont have enough information for making event message */
if (NULL == *out_message)
{
*out_message = zbx_strdcatf(*out_message, "The description for Event ID:%lu in Source:'%s'"
" cannot be found. Either the component that raises this event is not installed"
" on your local computer or the installation is corrupted. You can install or repair"
" the component on the local computer. If the event originated on another computer,"
" the display information had to be saved with the event.", *out_eventid,
NULL == *out_provider ? "" : *out_provider);
}
ret = SUCCEED;
finish:
if (NULL != event_bookmark)
EvtClose(event_bookmark);
zbx_free(tmp_str);
zbx_free(renderedContent);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/* process eventlog with Windows API version 6 */
int process_eventlog6(const char *source, zbx_uint64_t *lastlogsize, unsigned long *out_timestamp,
char **out_provider, char **out_source, unsigned short *out_severity, char **out_message,
unsigned long *out_eventid, zbx_uint64_t *FirstID, zbx_uint64_t *LastID, EVT_HANDLE *render_context,
EVT_HANDLE *query, zbx_uint64_t *keywords, unsigned char skip_old_data)
{
const char *__function_name = "process_eventlog6";
zbx_uint64_t i = 0;
zbx_uint64_t reading_startpoint = 0;
LPWSTR wsource = NULL;
int ret = FAIL;
*out_timestamp = 0;
*out_provider = NULL;
*out_source = NULL;
*out_severity = 0;
*out_message = NULL;
*out_eventid = 0;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() source: '%s' previous lastlogsize: " ZBX_FS_UI64 ", FirstID: "
ZBX_FS_UI64 ", LastID: " ZBX_FS_UI64, __function_name, source, *lastlogsize, *FirstID,
*LastID);
wsource = zbx_utf8_to_unicode(source);
/* update counters */
if (1 == skip_old_data)
{
(*lastlogsize) = *LastID - 1;
zabbix_log(LOG_LEVEL_DEBUG, "skipping existing data: lastlogsize:" ZBX_FS_UI64,
*lastlogsize);
ret = SUCCEED;
goto finish;
}
else if (*lastlogsize >= *FirstID && *lastlogsize < *LastID)
reading_startpoint = (*lastlogsize) + 1;
else
reading_startpoint = *FirstID;
if (reading_startpoint == *LastID)
{
ret = SUCCEED;
goto finish;
}
/* cycle through the new records */
for (i = reading_startpoint; i < *LastID; i++)
{
if (SUCCEED == zbx_get_eventlog_message6(wsource, &i, out_severity, out_timestamp, out_provider,
out_source, out_message, out_eventid, render_context, query, keywords))
{
*lastlogsize = i;
ret = SUCCEED;
goto finish;
}
}
finish:
zbx_free(wsource);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/* finalize eventlog6 and free the handles */
int finalize_eventlog6(EVT_HANDLE *render_context, EVT_HANDLE *query)
{
const char *__function_name = "finalize_eventlog6";
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
if (NULL != *query)
{
EvtClose(*query);
*query = NULL;
}
if (NULL != *render_context)
{
EvtClose(*render_context);
*render_context = NULL;
}
ret = SUCCEED;
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
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