mirror of
https://github.com/prometheus-community/windows_exporter.git
synced 2026-02-08 05:56:37 +00:00
106 lines
3.0 KiB
Go
106 lines
3.0 KiB
Go
// SPDX-License-Identifier: Apache-2.0
|
|
//
|
|
// Copyright The Prometheus Authors
|
|
// Licensed 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.
|
|
|
|
//go:build windows
|
|
|
|
package hcn
|
|
|
|
import (
|
|
"encoding/json"
|
|
"fmt"
|
|
"unsafe"
|
|
|
|
"github.com/prometheus-community/windows_exporter/internal/headers/hcs"
|
|
"github.com/prometheus-community/windows_exporter/internal/utils"
|
|
"golang.org/x/sys/windows"
|
|
)
|
|
|
|
//nolint:gochecknoglobals
|
|
var (
|
|
modvmcompute = windows.NewLazySystemDLL("vmcompute.dll")
|
|
procHNSCall = modvmcompute.NewProc("HNSCall")
|
|
|
|
hcnBodyEmpty = utils.Must(windows.UTF16PtrFromString(""))
|
|
hcnMethodGet = utils.Must(windows.UTF16PtrFromString("GET"))
|
|
hcnPathEndpoints = utils.Must(windows.UTF16PtrFromString("/endpoints/"))
|
|
hcnPathEndpointStats = utils.Must(windows.UTF16FromString("/endpointstats/"))
|
|
)
|
|
|
|
func ListEndpoints() ([]EndpointProperties, error) {
|
|
result, err := hnsCall(hcnMethodGet, hcnPathEndpoints, hcnBodyEmpty)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var endpoints struct {
|
|
Success bool `json:"success"`
|
|
Error string `json:"error"`
|
|
Output []EndpointProperties `json:"output"`
|
|
}
|
|
|
|
if err := json.Unmarshal([]byte(result), &endpoints); err != nil {
|
|
return nil, fmt.Errorf("failed to unmarshal JSON %s: %w", result, err)
|
|
}
|
|
|
|
if !endpoints.Success {
|
|
return nil, fmt.Errorf("HNSCall failed: %s", endpoints.Error)
|
|
}
|
|
|
|
return endpoints.Output, nil
|
|
}
|
|
|
|
func GetHNSEndpointStats(endpointID string) (EndpointStats, error) {
|
|
endpointIDUTF16, err := windows.UTF16FromString(endpointID)
|
|
if err != nil {
|
|
return EndpointStats{}, fmt.Errorf("failed to convert endpoint ID to UTF16: %w", err)
|
|
}
|
|
|
|
path := hcnPathEndpointStats[:len(hcnPathEndpointStats)-1]
|
|
path = append(path, endpointIDUTF16...)
|
|
|
|
result, err := hnsCall(hcnMethodGet, &path[0], hcnBodyEmpty)
|
|
if err != nil {
|
|
return EndpointStats{}, err
|
|
}
|
|
|
|
var stats EndpointStats
|
|
|
|
if err := json.Unmarshal([]byte(result), &stats); err != nil {
|
|
return EndpointStats{}, fmt.Errorf("failed to unmarshal JSON %s: %w", result, err)
|
|
}
|
|
|
|
return stats, nil
|
|
}
|
|
|
|
func hnsCall(method, path, body *uint16) (string, error) {
|
|
var responseJSON *uint16
|
|
|
|
r1, _, _ := procHNSCall.Call(
|
|
uintptr(unsafe.Pointer(method)),
|
|
uintptr(unsafe.Pointer(path)),
|
|
uintptr(unsafe.Pointer(body)),
|
|
uintptr(unsafe.Pointer(&responseJSON)),
|
|
)
|
|
|
|
response := windows.UTF16PtrToString(responseJSON)
|
|
windows.CoTaskMemFree(unsafe.Pointer(responseJSON))
|
|
|
|
if r1 != 0 {
|
|
return "", fmt.Errorf("HNSCall failed: HRESULT 0x%X: %w", r1, hcs.Win32FromHResult(r1))
|
|
}
|
|
|
|
return response, nil
|
|
}
|