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| // Licensed to Elasticsearch B.V. under one or more contributor | ||
| // license agreements. See the NOTICE file distributed with | ||
| // this work for additional information regarding copyright | ||
| // ownership. Elasticsearch B.V. licenses this file to you 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 | ||
| // | ||
| // 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. | ||
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| //go:build windows | ||
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| package eventlog | ||
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| import ( | ||
| "encoding/xml" | ||
| "fmt" | ||
| "strings" | ||
| "time" | ||
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| "github.com/joeshaw/multierror" | ||
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| conf "github.com/elastic/elastic-agent-libs/config" | ||
| ) | ||
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| type validator interface { | ||
| Validate() error | ||
| } | ||
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| func readConfig(c *conf.C, config interface{}) error { | ||
| if err := c.Unpack(config); err != nil { | ||
| return fmt.Errorf("failed unpacking config. %v", err) | ||
| } | ||
|
|
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| if v, ok := config.(validator); ok { | ||
| if err := v.Validate(); err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| type config struct { | ||
| Renderer string `config:"renderer"` // Name of the renderer to use. Optional. | ||
| Name string `config:"name"` // Name of the event log or channel or file. | ||
| ID string `config:"id"` // Identifier for the event log. | ||
| XMLQuery string `config:"xml_query"` // Custom query XML. Must not be used with the keys from eventlog.query. | ||
| BatchReadSize int `config:"batch_read_size"` // Maximum number of events that Read will return. | ||
| IncludeXML bool `config:"include_xml"` | ||
| Forwarded *bool `config:"forwarded"` | ||
| SimpleQuery query `config:",inline"` | ||
| NoMoreEvents NoMoreEventsAction `config:"no_more_events"` // Action to take when no more events are available - wait or stop. | ||
| EventLanguage uint32 `config:"language"` | ||
| } | ||
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| // query contains parameters used to customize the event log data that is | ||
| // queried from the log. | ||
| type query struct { | ||
| IgnoreOlder time.Duration `config:"ignore_older"` // Ignore records older than this period of time. | ||
| EventID string `config:"event_id"` // White-list and black-list of events. | ||
| Level string `config:"level"` // Severity level. | ||
| Provider []string `config:"provider"` // Provider (source name). | ||
| } | ||
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| // NoMoreEventsAction defines what action for the reader to take when | ||
| // ERROR_NO_MORE_ITEMS is returned by the Windows API. | ||
| type NoMoreEventsAction uint8 | ||
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| const ( | ||
| // Wait for new events. | ||
| Wait NoMoreEventsAction = iota | ||
| // Stop the reader. | ||
| Stop | ||
| ) | ||
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| var noMoreEventsActionNames = map[NoMoreEventsAction]string{ | ||
| Wait: "wait", | ||
| Stop: "stop", | ||
| } | ||
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| // Unpack sets the action based on the string value. | ||
| func (a *NoMoreEventsAction) Unpack(v string) error { | ||
| v = strings.ToLower(v) | ||
| for action, name := range noMoreEventsActionNames { | ||
| if v == name { | ||
| *a = action | ||
| return nil | ||
| } | ||
| } | ||
| return fmt.Errorf("invalid no_more_events action: %v", v) | ||
| } | ||
|
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| // String returns the name of the action. | ||
| func (a NoMoreEventsAction) String() string { return noMoreEventsActionNames[a] } | ||
|
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| // Validate validates the winEventLogConfig data and returns an error describing | ||
| // any problems or nil. | ||
| func (c *config) Validate() error { | ||
| var errs multierror.Errors | ||
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| if c.XMLQuery != "" { | ||
| if c.ID == "" { | ||
| errs = append(errs, fmt.Errorf("event log is missing an 'id'")) | ||
| } | ||
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| // Check for XML syntax errors. This does not check the validity of the query itself. | ||
| if err := xml.Unmarshal([]byte(c.XMLQuery), &struct{}{}); err != nil { | ||
| errs = append(errs, fmt.Errorf("invalid xml_query: %w", err)) | ||
| } | ||
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| switch { | ||
| case c.Name != "": | ||
| errs = append(errs, fmt.Errorf("xml_query cannot be used with 'name'")) | ||
| case c.SimpleQuery.IgnoreOlder != 0: | ||
| errs = append(errs, fmt.Errorf("xml_query cannot be used with 'ignore_older'")) | ||
| case c.SimpleQuery.Level != "": | ||
| errs = append(errs, fmt.Errorf("xml_query cannot be used with 'level'")) | ||
| case c.SimpleQuery.EventID != "": | ||
| errs = append(errs, fmt.Errorf("xml_query cannot be used with 'event_id'")) | ||
| case len(c.SimpleQuery.Provider) != 0: | ||
| errs = append(errs, fmt.Errorf("xml_query cannot be used with 'provider'")) | ||
| } | ||
| } else if c.Name == "" { | ||
| errs = append(errs, fmt.Errorf("event log is missing a 'name'")) | ||
| } | ||
|
|
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| return errs.Err() | ||
| } |
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