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lib/discover: Add instance ID to local discovery (fixes #3278)

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A random "instance ID" is generated on each start of the local discovery
service. The instance ID is included in the announcement. When we see a
new instance ID we treat is a new device and respond with an
announcement of our own. Hence devices get to know each other quickly on
restart.

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3385
This commit is contained in:
Jakob Borg
2016-07-04 11:16:48 +00:00
committed by Audrius Butkevicius
parent 8d0019595f
commit 9a0e5a7c18
5 changed files with 128 additions and 16 deletions
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46
lib/discover/local.pb.go
View File

@@ -30,8 +30,9 @@ var _ = math.Inf
const _ = proto.GoGoProtoPackageIsVersion1
type Announce struct {
ID []byte `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
Addresses []string `protobuf:"bytes,2,rep,name=addresses" json:"addresses,omitempty"`
ID []byte `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
Addresses []string `protobuf:"bytes,2,rep,name=addresses" json:"addresses,omitempty"`
InstanceID int64 `protobuf:"varint,3,opt,name=instance_id,json=instanceId,proto3" json:"instance_id,omitempty"`
}
func (m *Announce) Reset() { *m = Announce{} }
@@ -78,6 +79,11 @@ func (m *Announce) MarshalTo(data []byte) (int, error) {
i += copy(data[i:], s)
}
}
if m.InstanceID != 0 {
data[i] = 0x18
i++
i = encodeVarintLocal(data, i, uint64(m.InstanceID))
}
return i, nil
}
@@ -121,6 +127,9 @@ func (m *Announce) ProtoSize() (n int) {
n += 1 + l + sovLocal(uint64(l))
}
}
if m.InstanceID != 0 {
n += 1 + sovLocal(uint64(m.InstanceID))
}
return n
}
@@ -226,6 +235,25 @@ func (m *Announce) Unmarshal(data []byte) error {
}
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:])
@@ -353,16 +381,18 @@ var (
)
var fileDescriptorLocal = []byte{
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