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wintun: keep reference to pool in wintun object

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This commit is contained in:
Jason A. Donenfeld 2019-08-29 12:13:16 -06:00
parent 69c26dc258
commit 7689d09336
1 changed files with 9 additions and 7 deletions
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16
tun/wintun/wintun_windows.go
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@ -29,6 +29,7 @@ type Wintun struct {
devInstanceID string devInstanceID string
luidIndex uint32 luidIndex uint32
ifType uint32 ifType uint32
pool Pool
} }
var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}} var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
@ -40,7 +41,7 @@ const (
) )
// makeWintun creates a Wintun interface handle and populates it from the device's registry key. // makeWintun creates a Wintun interface handle and populates it from the device's registry key.
func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfoData) (*Wintun, error) { func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfoData, pool Pool) (*Wintun, error) {
// Open HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\<class>\<id> registry key. // Open HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\<class>\<id> registry key.
key, err := deviceInfoSet.OpenDevRegKey(deviceInfoData, setupapi.DICS_FLAG_GLOBAL, 0, setupapi.DIREG_DRV, registry.QUERY_VALUE) key, err := deviceInfoSet.OpenDevRegKey(deviceInfoData, setupapi.DICS_FLAG_GLOBAL, 0, setupapi.DIREG_DRV, registry.QUERY_VALUE)
if err != nil { if err != nil {
@ -82,6 +83,7 @@ func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfo
devInstanceID: instanceID, devInstanceID: instanceID,
luidIndex: uint32(luidIdx), luidIndex: uint32(luidIdx),
ifType: uint32(ifType), ifType: uint32(ifType),
pool: pool,
}, nil }, nil
} }
@ -121,7 +123,7 @@ func (pool Pool) GetInterface(ifname string) (*Wintun, error) {
continue continue
} }
wintun, err := makeWintun(devInfoList, deviceData) wintun, err := makeWintun(devInfoList, deviceData, pool)
if err != nil { if err != nil {
continue continue
} }
@ -361,7 +363,7 @@ func (pool Pool) CreateInterface(requestedGUID *windows.GUID) (wintun *Wintun, r
} }
// Get network interface. // Get network interface.
wintun, err = makeWintun(devInfoList, deviceData) wintun, err = makeWintun(devInfoList, deviceData, pool)
if err != nil { if err != nil {
err = fmt.Errorf("makeWintun failed: %v", err) err = fmt.Errorf("makeWintun failed: %v", err)
return return
@ -495,7 +497,7 @@ func (pool Pool) DeleteMatchingInterfaces(matches func(wintun *Wintun) bool) (de
continue continue
} }
wintun, err := makeWintun(devInfoList, deviceData) wintun, err := makeWintun(devInfoList, deviceData, pool)
if err != nil { if err != nil {
errors = append(errors, fmt.Errorf("makeWintun failed: %v", err)) errors = append(errors, fmt.Errorf("makeWintun failed: %v", err))
continue continue
@ -589,7 +591,7 @@ func (wintun *Wintun) InterfaceName() (string, error) {
} }
// SetInterfaceName sets name of the Wintun interface. // SetInterfaceName sets name of the Wintun interface.
func (wintun *Wintun) SetInterfaceName(ifname string, pool Pool) error { func (wintun *Wintun) SetInterfaceName(ifname string) error {
const maxSuffix = 1000 const maxSuffix = 1000
availableIfname := ifname availableIfname := ifname
for i := 0; ; i++ { for i := 0; ; i++ {
@ -632,7 +634,7 @@ func (wintun *Wintun) SetInterfaceName(ifname string, pool Pool) error {
return fmt.Errorf("Device-level registry key open failed: %v", err) return fmt.Errorf("Device-level registry key open failed: %v", err)
} }
defer deviceRegKey.Close() defer deviceRegKey.Close()
err = deviceRegKey.SetStringValue("FriendlyName", pool.DeviceTypeName()) err = deviceRegKey.SetStringValue("FriendlyName", wintun.pool.DeviceTypeName())
if err != nil { if err != nil {
return fmt.Errorf("SetStringValue(FriendlyName) failed: %v", err) return fmt.Errorf("SetStringValue(FriendlyName) failed: %v", err)
} }
@ -687,7 +689,7 @@ func (wintun *Wintun) deviceData() (setupapi.DevInfo, *setupapi.DevInfoData, err
// Get interface ID. // Get interface ID.
// TODO: Store some ID in the Wintun object such that this call isn't required. // TODO: Store some ID in the Wintun object such that this call isn't required.
wintun2, err := makeWintun(devInfoList, deviceData) wintun2, err := makeWintun(devInfoList, deviceData, wintun.pool)
if err != nil { if err != nil {
continue continue
} }