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Add more detailed errors and tests in the windows/service metricset (#…
…17725) * error details, tests * changelog * work on tests * refactoring * mage fmt * mage fmt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,197 @@ | ||
| // 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. | ||
|
|
||
| // +build windows | ||
|
|
||
| package service | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
| "encoding/base64" | ||
| "strconv" | ||
| "syscall" | ||
|
|
||
| "github.com/pkg/errors" | ||
| "golang.org/x/sys/windows/registry" | ||
|
|
||
| "github.com/elastic/beats/v7/libbeat/common" | ||
| ) | ||
|
|
||
| var ( | ||
| // errorNames is mapping of errno values to names. | ||
| // https://msdn.microsoft.com/en-us/library/windows/desktop/ms681383(v=vs.85).aspx | ||
| errorNames = map[uint32]string{ | ||
| 1077: "ERROR_SERVICE_NEVER_STARTED", | ||
| } | ||
| InvalidDatabaseHandle = ^Handle(0) | ||
| ) | ||
|
|
||
| type Handle uintptr | ||
|
|
||
| type Reader struct { | ||
| handle Handle | ||
| state ServiceEnumState | ||
| guid string // Host's MachineGuid value (a unique ID for the host). | ||
| ids map[string]string // Cache of service IDs. | ||
| protectedServices map[string]struct{} | ||
| } | ||
|
|
||
| func NewReader() (*Reader, error) { | ||
| handle, err := openSCManager("", "", ScManagerEnumerateService|ScManagerConnect) | ||
| if err != nil { | ||
| return nil, errors.Wrap(err, "initialization failed") | ||
| } | ||
|
|
||
| guid, err := getMachineGUID() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| r := &Reader{ | ||
| handle: handle, | ||
| state: ServiceStateAll, | ||
| guid: guid, | ||
| ids: map[string]string{}, | ||
| protectedServices: map[string]struct{}{}, | ||
| } | ||
|
|
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| return r, nil | ||
| } | ||
|
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| func (reader *Reader) Read() ([]common.MapStr, error) { | ||
| services, err := GetServiceStates(reader.handle, reader.state, reader.protectedServices) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
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| result := make([]common.MapStr, 0, len(services)) | ||
|
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| for _, service := range services { | ||
| ev := common.MapStr{ | ||
| "id": reader.getServiceID(service.ServiceName), | ||
| "display_name": service.DisplayName, | ||
| "name": service.ServiceName, | ||
| "state": service.CurrentState, | ||
| "start_type": service.StartType.String(), | ||
| "start_name": service.ServiceStartName, | ||
| "path_name": service.BinaryPathName, | ||
| } | ||
|
|
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| if service.CurrentState == "Stopped" { | ||
| ev.Put("exit_code", getErrorCode(service.ExitCode)) | ||
| } | ||
|
|
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| if service.PID > 0 { | ||
| ev.Put("pid", service.PID) | ||
| } | ||
|
|
||
| if service.Uptime > 0 { | ||
| if _, err = ev.Put("uptime.ms", service.Uptime); err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
|
|
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| result = append(result, ev) | ||
| } | ||
|
|
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| return result, nil | ||
| } | ||
|
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| func (reader *Reader) Close() error { | ||
| return closeHandle(reader.handle) | ||
| } | ||
|
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| func openSCManager(machineName string, databaseName string, desiredAccess ServiceSCMAccessRight) (Handle, error) { | ||
| var machineNamePtr *uint16 | ||
| if machineName != "" { | ||
| var err error | ||
| machineNamePtr, err = syscall.UTF16PtrFromString(machineName) | ||
| if err != nil { | ||
| return InvalidDatabaseHandle, err | ||
| } | ||
| } | ||
|
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| var databaseNamePtr *uint16 | ||
| if databaseName != "" { | ||
| var err error | ||
| databaseNamePtr, err = syscall.UTF16PtrFromString(databaseName) | ||
| if err != nil { | ||
| return InvalidDatabaseHandle, err | ||
| } | ||
| } | ||
|
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| handle, err := _OpenSCManager(machineNamePtr, databaseNamePtr, desiredAccess) | ||
| if err != nil { | ||
| return InvalidDatabaseHandle, ServiceErrno(err.(syscall.Errno)) | ||
| } | ||
|
|
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| return handle, nil | ||
| } | ||
|
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| // getMachineGUID returns the machine's GUID value which is unique to a Windows | ||
| // installation. | ||
| func getMachineGUID() (string, error) { | ||
| const key = registry.LOCAL_MACHINE | ||
| const path = `SOFTWARE\Microsoft\Cryptography` | ||
| const name = "MachineGuid" | ||
|
|
||
| k, err := registry.OpenKey(key, path, registry.READ|registry.WOW64_64KEY) | ||
| if err != nil { | ||
| return "", errors.Wrapf(err, `failed to open HKLM\%v`, path) | ||
| } | ||
|
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||
| guid, _, err := k.GetStringValue(name) | ||
| if err != nil { | ||
| return "", errors.Wrapf(err, `failed to get value of HKLM\%v\%v`, path, name) | ||
| } | ||
|
|
||
| return guid, nil | ||
| } | ||
|
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||
| // getServiceID returns a unique ID for the service that is derived from the | ||
| // machine's GUID and the service's name. | ||
| func (reader *Reader) getServiceID(name string) string { | ||
| // hash returns a base64 encoded sha256 hash that is truncated to 10 chars. | ||
| hash := func(v string) string { | ||
| sum := sha256.Sum256([]byte(v)) | ||
| base64Hash := base64.RawURLEncoding.EncodeToString(sum[:]) | ||
| return base64Hash[:10] | ||
| } | ||
|
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| id, found := reader.ids[name] | ||
| if !found { | ||
| id = hash(reader.guid + name) | ||
| reader.ids[name] = id | ||
| } | ||
|
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| return id | ||
| } | ||
|
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| func getErrorCode(errno uint32) string { | ||
| name, found := errorNames[errno] | ||
| if found { | ||
| return name | ||
| } | ||
| return strconv.Itoa(int(errno)) | ||
| } | ||
|
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| func closeHandle(handle Handle) error { | ||
| if err := _CloseServiceHandle(uintptr(handle)); err != nil { | ||
| return ServiceErrno(err.(syscall.Errno)) | ||
| } | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| // 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. | ||
|
|
||
| // +build windows | ||
|
|
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| package service | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
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| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
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| func TestNewReader(t *testing.T) { | ||
| reader, err := NewReader() | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, reader) | ||
| defer reader.Close() | ||
| assert.NotNil(t, reader.handle) | ||
| } | ||
|
|
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| func TestOpenSCManager(t *testing.T) { | ||
| handle, err := openSCManager("invalidMachine", "", ScManagerEnumerateService|ScManagerConnect) | ||
| assert.Error(t, err) | ||
| assert.Equal(t, handle, InvalidDatabaseHandle) | ||
|
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| handle, err = openSCManager("", "invalidDbName", ScManagerEnumerateService|ScManagerConnect) | ||
| assert.Error(t, err) | ||
| assert.Equal(t, handle, InvalidDatabaseHandle) | ||
|
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| handle, err = openSCManager("", "", ScManagerEnumerateService|ScManagerConnect) | ||
| assert.NoError(t, err) | ||
| assert.NotEqual(t, handle, InvalidDatabaseHandle) | ||
| closeHandle(handle) | ||
| } | ||
|
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| func TestGetMachineGUID(t *testing.T) { | ||
| guid, err := getMachineGUID() | ||
| assert.NoError(t, err) | ||
| assert.NotNil(t, guid) | ||
| } | ||
|
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| func TestRead(t *testing.T) { | ||
| reader, err := NewReader() | ||
| assert.NoError(t, err) | ||
| result, err := reader.Read() | ||
| assert.NoError(t, err) | ||
| assert.True(t, len(result) > 0) | ||
| reader.Close() | ||
| } |
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