refactor: use modern Protobuf encoder (#9817)

At a high level, this is what I've done and why:

- I'm moving the protobuf generation for the `protocol`, `discovery` and
`db` packages to the modern alternatives, and using `buf` to generate
because it's nice and simple.
- After trying various approaches on how to integrate the new types with
the existing code, I opted for splitting off our own data model types
from the on-the-wire generated types. This means we can have a
`FileInfo` type with nicer ergonomics and lots of methods, while the
protobuf generated type stays clean and close to the wire protocol. It
does mean copying between the two when required, which certainly adds a
small amount of inefficiency. If we want to walk this back in the future
and use the raw generated type throughout, that's possible, this however
makes the refactor smaller (!) as it doesn't change everything about the
type for everyone at the same time.
- I have simply removed in cold blood a significant number of old
database migrations. These depended on previous generations of generated
messages of various kinds and were annoying to support in the new
fashion. The oldest supported database version now is the one from
Syncthing 1.9.0 from Sep 7, 2020.
- I changed config structs to be regular manually defined structs.

For the sake of discussion, some things I tried that turned out not to
work...

### Embedding / wrapping

Embedding the protobuf generated structs in our existing types as a data
container and keeping our methods and stuff:

```
package protocol

type FileInfo struct {
  *generated.FileInfo
}
```

This generates a lot of problems because the internal shape of the
generated struct is quite different (different names, different types,
more pointers), because initializing it doesn't work like you'd expect
(i.e., you end up with an embedded nil pointer and a panic), and because
the types of child types don't get wrapped. That is, even if we also
have a similar wrapper around a `Vector`, that's not the type you get
when accessing `someFileInfo.Version`, you get the `*generated.Vector`
that doesn't have methods, etc.

### Aliasing

```
package protocol

type FileInfo = generated.FileInfo
```

Doesn't help because you can't attach methods to it, plus all the above.

### Generating the types into the target package like we do now and
attaching methods

This fails because of the different shape of the generated type (as in
the embedding case above) plus the generated struct already has a bunch
of methods that we can't necessarily override properly (like `String()`
and a bunch of getters).

### Methods to functions

I considered just moving all the methods we attach to functions in a
specific package, so that for example

```
package protocol

func (f FileInfo) Equal(other FileInfo) bool
```

would become

```
package fileinfos

func Equal(a, b *generated.FileInfo) bool
```

and this would mostly work, but becomes quite verbose and cumbersome,
and somewhat limits discoverability (you can't see what methods are
available on the type in auto completions, etc). In the end I did this
in some cases, like in the database layer where a lot of things like
`func (fv *FileVersion) IsEmpty() bool` becomes `func fvIsEmpty(fv
*generated.FileVersion)` because they were anyway just internal methods.

Fixes #8247
This commit is contained in:
Jakob Borg
2024-12-01 16:50:17 +01:00
committed by GitHub
parent 2b8ee4c7a5
commit 77970d5113
203 changed files with 7437 additions and 28636 deletions
+1 -2
View File
@@ -10,9 +10,8 @@ import (
stdsync "sync"
"time"
"github.com/thejerf/suture/v4"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/thejerf/suture/v4"
)
// A cachedFinder is a Finder with associated cache timeouts.
+2 -1
View File
@@ -21,11 +21,12 @@ import (
stdsync "sync"
"time"
"golang.org/x/net/http2"
"github.com/syncthing/syncthing/lib/connections/registry"
"github.com/syncthing/syncthing/lib/dialer"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/protocol"
"golang.org/x/net/http2"
)
type globalClient struct {
+28 -17
View File
@@ -7,6 +7,7 @@
package discover
import (
"bytes"
"context"
"encoding/binary"
"encoding/hex"
@@ -17,12 +18,15 @@ import (
"strconv"
"time"
"github.com/thejerf/suture/v4"
"google.golang.org/protobuf/proto"
"github.com/syncthing/syncthing/internal/gen/discoproto"
"github.com/syncthing/syncthing/lib/beacon"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/syncthing/syncthing/lib/rand"
"github.com/syncthing/syncthing/lib/svcutil"
"github.com/thejerf/suture/v4"
)
type localClient struct {
@@ -121,12 +125,12 @@ func (c *localClient) announcementPkt(instanceID int64, msg []byte) ([]byte, boo
return msg, false
}
pkt := Announce{
ID: c.myID,
pkt := &discoproto.Announce{
Id: c.myID[:],
Addresses: addrs,
InstanceID: instanceID,
InstanceId: instanceID,
}
bs, _ := pkt.Marshal()
bs, _ := proto.Marshal(pkt)
if pktLen := 4 + len(bs); cap(msg) < pktLen {
msg = make([]byte, 0, pktLen)
@@ -193,18 +197,19 @@ func (c *localClient) recvAnnouncements(ctx context.Context) error {
continue
}
var pkt Announce
err := pkt.Unmarshal(buf[4:])
var pkt discoproto.Announce
err := proto.Unmarshal(buf[:4], &pkt)
if err != nil && err != io.EOF {
l.Debugf("discover: Failed to unmarshal local announcement from %s:\n%s", addr, hex.Dump(buf))
continue
}
l.Debugf("discover: Received local announcement from %s for %s", addr, pkt.ID)
id, _ := protocol.DeviceIDFromBytes(pkt.Id)
l.Debugf("discover: Received local announcement from %s for %s", addr, id)
var newDevice bool
if pkt.ID != c.myID {
newDevice = c.registerDevice(addr, pkt)
if !bytes.Equal(pkt.Id, c.myID[:]) {
newDevice = c.registerDevice(addr, &pkt)
}
if newDevice {
@@ -218,18 +223,24 @@ func (c *localClient) recvAnnouncements(ctx context.Context) error {
}
}
func (c *localClient) registerDevice(src net.Addr, device Announce) bool {
func (c *localClient) registerDevice(src net.Addr, device *discoproto.Announce) bool {
// Remember whether we already had a valid cache entry for this device.
// If the instance ID has changed the remote device has restarted since
// we last heard from it, so we should treat it as a new device.
ce, existsAlready := c.Get(device.ID)
isNewDevice := !existsAlready || time.Since(ce.when) > CacheLifeTime || ce.instanceID != device.InstanceID
id, err := protocol.DeviceIDFromBytes(device.Id)
if err != nil {
l.Debugf("discover: Failed to parse device ID %x: %v", device.Id, err)
return false
}
ce, existsAlready := c.Get(id)
isNewDevice := !existsAlready || time.Since(ce.when) > CacheLifeTime || ce.instanceID != device.InstanceId
// Any empty or unspecified addresses should be set to the source address
// of the announcement. We also skip any addresses we can't parse.
l.Debugln("discover: Registering addresses for", device.ID)
l.Debugln("discover: Registering addresses for", id)
var validAddresses []string
for _, addr := range device.Addresses {
u, err := url.Parse(addr)
@@ -272,16 +283,16 @@ func (c *localClient) registerDevice(src net.Addr, device Announce) bool {
}
}
c.Set(device.ID, CacheEntry{
c.Set(id, CacheEntry{
Addresses: validAddresses,
when: time.Now(),
found: true,
instanceID: device.InstanceID,
instanceID: device.InstanceId,
})
if isNewDevice {
c.evLogger.Log(events.DeviceDiscovered, map[string]interface{}{
"device": device.ID.String(),
"device": id.String(),
"addrs": validAddresses,
})
}
-399
View File
@@ -1,399 +0,0 @@
// Code generated by protoc-gen-gogo. DO NOT EDIT.
// source: lib/discover/local.proto
package discover
import (
fmt "fmt"
_ "github.com/gogo/protobuf/gogoproto"
proto "github.com/gogo/protobuf/proto"
github_com_syncthing_syncthing_lib_protocol "github.com/syncthing/syncthing/lib/protocol"
_ "github.com/syncthing/syncthing/proto/ext"
io "io"
math "math"
math_bits "math/bits"
)
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
type Announce struct {
ID github_com_syncthing_syncthing_lib_protocol.DeviceID `protobuf:"bytes,1,opt,name=id,proto3,customtype=github.com/syncthing/syncthing/lib/protocol.DeviceID" json:"id" xml:"id"`
Addresses []string `protobuf:"bytes,2,rep,name=addresses,proto3" json:"addresses" xml:"address"`
InstanceID int64 `protobuf:"varint,3,opt,name=instance_id,json=instanceId,proto3" json:"instanceId" xml:"instanceId"`
}
func (m *Announce) Reset() { *m = Announce{} }
func (m *Announce) String() string { return proto.CompactTextString(m) }
func (*Announce) ProtoMessage() {}
func (*Announce) Descriptor() ([]byte, []int) {
return fileDescriptor_18afca46562fdaf4, []int{0}
}
func (m *Announce) XXX_Unmarshal(b []byte) error {
return m.Unmarshal(b)
}
func (m *Announce) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
if deterministic {
return xxx_messageInfo_Announce.Marshal(b, m, deterministic)
} else {
b = b[:cap(b)]
n, err := m.MarshalToSizedBuffer(b)
if err != nil {
return nil, err
}
return b[:n], nil
}
}
func (m *Announce) XXX_Merge(src proto.Message) {
xxx_messageInfo_Announce.Merge(m, src)
}
func (m *Announce) XXX_Size() int {
return m.ProtoSize()
}
func (m *Announce) XXX_DiscardUnknown() {
xxx_messageInfo_Announce.DiscardUnknown(m)
}
var xxx_messageInfo_Announce proto.InternalMessageInfo
func init() {
proto.RegisterType((*Announce)(nil), "discover.Announce")
}
func init() { proto.RegisterFile("lib/discover/local.proto", fileDescriptor_18afca46562fdaf4) }
var fileDescriptor_18afca46562fdaf4 = []byte{
// 334 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x91, 0x31, 0x6b, 0xe3, 0x30,
0x18, 0x86, 0x2d, 0x05, 0x8e, 0x44, 0x77, 0x07, 0x87, 0x27, 0x93, 0x41, 0x0a, 0xbe, 0x0c, 0x81,
0x42, 0x3c, 0xb4, 0x53, 0x29, 0x85, 0x1a, 0x2f, 0x1e, 0xba, 0x64, 0xec, 0xd0, 0x10, 0x4b, 0xaa,
0x23, 0x70, 0xa4, 0x60, 0x39, 0x21, 0xfd, 0x07, 0x1d, 0x4b, 0xb6, 0x6e, 0xfd, 0x39, 0x19, 0x3d,
0x96, 0x0e, 0x82, 0xd8, 0x5b, 0xc6, 0xfc, 0x82, 0x12, 0x25, 0x69, 0x32, 0x76, 0x7b, 0xf5, 0xe8,
0x95, 0x78, 0xf8, 0x3e, 0xe4, 0x65, 0x22, 0x09, 0x98, 0xd0, 0x54, 0xcd, 0x79, 0x1e, 0x64, 0x8a,
0x8e, 0xb2, 0xfe, 0x34, 0x57, 0x85, 0x72, 0x9b, 0x47, 0xda, 0xfe, 0x9f, 0xf3, 0xa9, 0xd2, 0x81,
0xc5, 0xc9, 0xec, 0x29, 0x48, 0x55, 0xaa, 0xec, 0xc1, 0xa6, 0x7d, 0xbd, 0xdd, 0xe2, 0x8b, 0x62,
0x1f, 0xfd, 0x37, 0x88, 0x9a, 0x77, 0x52, 0xaa, 0x99, 0xa4, 0xdc, 0x95, 0x08, 0x0a, 0xe6, 0x81,
0x0e, 0xe8, 0xfd, 0x09, 0x1f, 0x57, 0x86, 0x38, 0x9f, 0x86, 0x5c, 0xa5, 0xa2, 0x18, 0xcf, 0x92,
0x3e, 0x55, 0x93, 0x40, 0x3f, 0x4b, 0x5a, 0x8c, 0x85, 0x4c, 0xcf, 0xd2, 0xce, 0xc9, 0x7e, 0x45,
0x55, 0xd6, 0x8f, 0xf8, 0x5c, 0x50, 0x1e, 0x47, 0x95, 0x21, 0x30, 0x8e, 0x36, 0x86, 0x40, 0xc1,
0xb6, 0x86, 0x34, 0x17, 0x93, 0xec, 0xda, 0x17, 0xcc, 0x7f, 0x29, 0xbb, 0x60, 0x59, 0x76, 0x61,
0x1c, 0x0d, 0xa0, 0x60, 0xee, 0x0d, 0x6a, 0x8d, 0x18, 0xcb, 0xb9, 0xd6, 0x5c, 0x7b, 0xb0, 0xd3,
0xe8, 0xb5, 0x42, 0xbc, 0x31, 0xe4, 0x04, 0xb7, 0x86, 0xfc, 0xb5, 0x6f, 0x0f, 0xc4, 0x1f, 0x9c,
0xee, 0xdc, 0x21, 0xfa, 0x2d, 0xa4, 0x2e, 0x46, 0x92, 0xf2, 0xa1, 0x60, 0x5e, 0xa3, 0x03, 0x7a,
0x8d, 0xf0, 0xb6, 0x32, 0x04, 0xc5, 0x07, 0x6c, 0x15, 0xd0, 0xb1, 0x14, 0xef, 0x54, 0xfe, 0xed,
0x55, 0xbe, 0x91, 0xbf, 0x2c, 0xbb, 0x67, 0xfd, 0xc1, 0x59, 0x3b, 0xbc, 0x5f, 0xad, 0xb1, 0x53,
0xae, 0xb1, 0xb3, 0xaa, 0x30, 0x28, 0x2b, 0x0c, 0x5e, 0x6b, 0xec, 0xbc, 0xd7, 0x18, 0x94, 0x35,
0x76, 0x3e, 0x6a, 0xec, 0x3c, 0x5c, 0xfc, 0x60, 0x38, 0xc7, 0xd5, 0x24, 0xbf, 0xec, 0x98, 0x2e,
0xbf, 0x02, 0x00, 0x00, 0xff, 0xff, 0xdc, 0xe8, 0x9a, 0xd0, 0xc7, 0x01, 0x00, 0x00,
}
func (m *Announce) Marshal() (dAtA []byte, err error) {
size := m.ProtoSize()
dAtA = make([]byte, size)
n, err := m.MarshalToSizedBuffer(dAtA[:size])
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *Announce) MarshalTo(dAtA []byte) (int, error) {
size := m.ProtoSize()
return m.MarshalToSizedBuffer(dAtA[:size])
}
func (m *Announce) MarshalToSizedBuffer(dAtA []byte) (int, error) {
i := len(dAtA)
_ = i
var l int
_ = l
if m.InstanceID != 0 {
i = encodeVarintLocal(dAtA, i, uint64(m.InstanceID))
i--
dAtA[i] = 0x18
}
if len(m.Addresses) > 0 {
for iNdEx := len(m.Addresses) - 1; iNdEx >= 0; iNdEx-- {
i -= len(m.Addresses[iNdEx])
copy(dAtA[i:], m.Addresses[iNdEx])
i = encodeVarintLocal(dAtA, i, uint64(len(m.Addresses[iNdEx])))
i--
dAtA[i] = 0x12
}
}
{
size := m.ID.ProtoSize()
i -= size
if _, err := m.ID.MarshalTo(dAtA[i:]); err != nil {
return 0, err
}
i = encodeVarintLocal(dAtA, i, uint64(size))
}
i--
dAtA[i] = 0xa
return len(dAtA) - i, nil
}
func encodeVarintLocal(dAtA []byte, offset int, v uint64) int {
offset -= sovLocal(v)
base := offset
for v >= 1<<7 {
dAtA[offset] = uint8(v&0x7f | 0x80)
v >>= 7
offset++
}
dAtA[offset] = uint8(v)
return base
}
func (m *Announce) ProtoSize() (n int) {
if m == nil {
return 0
}
var l int
_ = l
l = m.ID.ProtoSize()
n += 1 + l + sovLocal(uint64(l))
if len(m.Addresses) > 0 {
for _, s := range m.Addresses {
l = len(s)
n += 1 + l + sovLocal(uint64(l))
}
}
if m.InstanceID != 0 {
n += 1 + sovLocal(uint64(m.InstanceID))
}
return n
}
func sovLocal(x uint64) (n int) {
return (math_bits.Len64(x|1) + 6) / 7
}
func sozLocal(x uint64) (n int) {
return sovLocal(uint64((x << 1) ^ uint64((int64(x) >> 63))))
}
func (m *Announce) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowLocal
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: Announce: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: Announce: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field ID", wireType)
}
var byteLen int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowLocal
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
byteLen |= int(b&0x7F) << shift
if b < 0x80 {
break
}
}
if byteLen < 0 {
return ErrInvalidLengthLocal
}
postIndex := iNdEx + byteLen
if postIndex < 0 {
return ErrInvalidLengthLocal
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
if err := m.ID.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
return err
}
iNdEx = postIndex
case 2:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Addresses", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowLocal
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= uint64(b&0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthLocal
}
postIndex := iNdEx + intStringLen
if postIndex < 0 {
return ErrInvalidLengthLocal
}
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Addresses = append(m.Addresses, string(dAtA[iNdEx:postIndex]))
iNdEx = postIndex
case 3:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field InstanceID", wireType)
}
m.InstanceID = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowLocal
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.InstanceID |= int64(b&0x7F) << shift
if b < 0x80 {
break
}
}
default:
iNdEx = preIndex
skippy, err := skipLocal(dAtA[iNdEx:])
if err != nil {
return err
}
if (skippy < 0) || (iNdEx+skippy) < 0 {
return ErrInvalidLengthLocal
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipLocal(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0
depth := 0
for iNdEx < l {
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowLocal
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
wireType := int(wire & 0x7)
switch wireType {
case 0:
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowLocal
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
iNdEx++
if dAtA[iNdEx-1] < 0x80 {
break
}
}
case 1:
iNdEx += 8
case 2:
var length int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowLocal
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
length |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
if length < 0 {
return 0, ErrInvalidLengthLocal
}
iNdEx += length
case 3:
depth++
case 4:
if depth == 0 {
return 0, ErrUnexpectedEndOfGroupLocal
}
depth--
case 5:
iNdEx += 4
default:
return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
}
if iNdEx < 0 {
return 0, ErrInvalidLengthLocal
}
if depth == 0 {
return iNdEx, nil
}
}
return 0, io.ErrUnexpectedEOF
}
var (
ErrInvalidLengthLocal = fmt.Errorf("proto: negative length found during unmarshaling")
ErrIntOverflowLocal = fmt.Errorf("proto: integer overflow")
ErrUnexpectedEndOfGroupLocal = fmt.Errorf("proto: unexpected end of group")
)
+19 -12
View File
@@ -13,6 +13,7 @@ import (
"net"
"testing"
"github.com/syncthing/syncthing/internal/gen/discoproto"
"github.com/syncthing/syncthing/lib/events"
"github.com/syncthing/syncthing/lib/protocol"
)
@@ -50,40 +51,40 @@ func TestLocalInstanceIDShouldTriggerNew(t *testing.T) {
lc := c.(*localClient)
src := &net.UDPAddr{IP: []byte{10, 20, 30, 40}, Port: 50}
new := lc.registerDevice(src, Announce{
ID: protocol.DeviceID{10, 20, 30, 40, 50, 60, 70, 80, 90},
new := lc.registerDevice(src, &discoproto.Announce{
Id: padDeviceID(10),
Addresses: []string{"tcp://0.0.0.0:22000"},
InstanceID: 1234567890,
InstanceId: 1234567890,
})
if !new {
t.Fatal("first register should be new")
}
new = lc.registerDevice(src, Announce{
ID: protocol.DeviceID{10, 20, 30, 40, 50, 60, 70, 80, 90},
new = lc.registerDevice(src, &discoproto.Announce{
Id: padDeviceID(10),
Addresses: []string{"tcp://0.0.0.0:22000"},
InstanceID: 1234567890,
InstanceId: 1234567890,
})
if new {
t.Fatal("second register should not be new")
}
new = lc.registerDevice(src, Announce{
ID: protocol.DeviceID{42, 10, 20, 30, 40, 50, 60, 70, 80, 90},
new = lc.registerDevice(src, &discoproto.Announce{
Id: padDeviceID(42),
Addresses: []string{"tcp://0.0.0.0:22000"},
InstanceID: 1234567890,
InstanceId: 1234567890,
})
if !new {
t.Fatal("new device ID should be new")
}
new = lc.registerDevice(src, Announce{
ID: protocol.DeviceID{10, 20, 30, 40, 50, 60, 70, 80, 90},
new = lc.registerDevice(src, &discoproto.Announce{
Id: padDeviceID(10),
Addresses: []string{"tcp://0.0.0.0:22000"},
InstanceID: 91234567890,
InstanceId: 91234567890,
})
if !new {
@@ -91,6 +92,12 @@ func TestLocalInstanceIDShouldTriggerNew(t *testing.T) {
}
}
func padDeviceID(bs ...byte) []byte {
var padded [32]byte
copy(padded[:], bs)
return padded[:]
}
func TestFilterUndialable(t *testing.T) {
addrs := []string{
"quic://[2001:db8::1]:22000", // OK