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|
package hardware
import (
"encoding/json"
"io/ioutil"
"sort"
"github.com/jouyouyun/hardware/cpu"
"github.com/jouyouyun/hardware/disk"
hdisk "github.com/jouyouyun/hardware/disk"
hdmi "github.com/jouyouyun/hardware/dmi"
"github.com/jouyouyun/hardware/network"
"github.com/jouyouyun/hardware/utils"
)
const (
etcMachineIDFile = "/etc/machine-id"
)
var (
_mid string
IncludeDiskInfo bool
)
// GenMachineID generate this machine's id
func GenMachineID() (string, error) {
if len(_mid) != 0 {
return _mid, nil
}
var (
mid string
err error
dmi *hdmi.DMI
disks disk.DiskList
root *disk.Disk
)
dmi, err = hdmi.GetDMI()
if !IncludeDiskInfo && err == nil && dmi.IsValid() {
mid, err = genMachineIDWithDMI(*dmi)
if len(mid) != 0 {
goto out
}
} else if dmi == nil {
dmi = &hdmi.DMI{}
}
// if dmi product uuid null or IncludeDiskInfo is true, generate machine id with root disk serial
disks, err = hdisk.GetDiskList()
if err == nil {
root = disks.GetRoot()
if root != nil && len(root.Serial) != 0 {
mid, err = genMachineIDWithDisk(*dmi, root)
if len(mid) != 0 {
goto out
}
}
}
mid, err = genMachineIDWithNet(*dmi)
if len(mid) != 0 {
goto out
}
mid, err = genMachineIDWithFile(etcMachineIDFile)
out:
_mid = mid
return mid, err
}
func genMachineIDWithDMI(dmi hdmi.DMI) (string, error) {
// bios info maybe changed after upgraded
dmi.BiosDate = ""
dmi.BiosVendor = ""
dmi.BiosVersion = ""
return doGenMachineID(&dmi)
}
func genMachineIDWithDisk(dmi hdmi.DMI, disk *hdisk.Disk) (string, error) {
// bios info maybe changed after upgraded
dmi.BiosDate = ""
dmi.BiosVendor = ""
dmi.BiosVersion = ""
var info = struct {
hdmi.DMI
DiskSerial string
}{
DMI: dmi,
DiskSerial: disk.Serial,
}
return doGenMachineID(&info)
}
func doGenMachineID(info interface{}) (string, error) {
data, err := json.Marshal(info)
if err != nil {
return "", err
}
return utils.SHA256Sum(data), nil
}
func genMachineIDWithNet(dmi hdmi.DMI) (string, error) {
cpuInfo, err := cpu.NewCPU()
if err != nil {
return "", err
}
netInfo, err := network.GetNetworkList()
if err != nil {
return "", err
}
var (
plist []string
vlist []string
alist []string
)
for _, info := range netInfo {
plist = append(plist, info.Product)
vlist = append(vlist, info.Vendor)
alist = append(alist, info.Address)
}
sort.Strings(plist)
sort.Strings(vlist)
sort.Strings(alist)
// bios info maybe changed after upgraded
dmi.BiosDate = ""
dmi.BiosVendor = ""
dmi.BiosVersion = ""
var info = struct {
hdmi.DMI
CPU string
ProductList []string
VendorList []string
AddressList []string
}{
DMI: dmi,
CPU: cpuInfo.Name,
ProductList: plist,
VendorList: vlist,
AddressList: alist,
}
return doGenMachineID(&info)
}
func genMachineIDWithFile(filename string) (string, error) {
contents, err := ioutil.ReadFile(filename)
if err != nil {
return "", err
}
var info = struct {
ID string
}{
ID: string(contents),
}
return doGenMachineID(&info)
}
|
