// getLocal attempts to retrieve the value from the datastore
func (dht *IpfsDHT) getLocal(key key.Key) ([]byte, error) {
log.Debug("getLocal %s", key)
v, err := dht.datastore.Get(key.DsKey())
if err != nil {
return nil, err
}
log.Debug("found in db")
byt, ok := v.([]byte)
if !ok {
return nil, errors.New("value stored in datastore not []byte")
}
rec := new(pb.Record)
err = proto.Unmarshal(byt, rec)
if err != nil {
return nil, err
}
// TODO: 'if paranoid'
if u.Debug {
err = dht.verifyRecordLocally(rec)
if err != nil {
log.Debugf("local record verify failed: %s (discarded)", err)
return nil, err
}
}
return rec.GetValue(), nil
}
func TestPBLinkMarshalTo(t *testing.T) {
popr := math_rand.New(math_rand.NewSource(time.Now().UnixNano()))
p := NewPopulatedPBLink(popr, false)
size := p.Size()
data := make([]byte, size)
for i := range data {
data[i] = byte(popr.Intn(256))
}
_, err := p.MarshalTo(data)
if err != nil {
panic(err)
}
msg := &PBLink{}
if err := github_com_gogo_protobuf_proto.Unmarshal(data, msg); err != nil {
panic(err)
}
for i := range data {
data[i] = byte(popr.Intn(256))
}
if err := p.VerboseEqual(msg); err != nil {
t.Fatalf("%#v !VerboseProto %#v, since %v", msg, p, err)
}
if !p.Equal(msg) {
t.Fatalf("%#v !Proto %#v", msg, p)
}
}
func TestGetExtensionStability(t *testing.T) {
check := func(m *pb.MyMessage) bool {
ext1, err := proto.GetExtension(m, pb.E_Ext_More)
if err != nil {
t.Fatalf("GetExtension() failed: %s", err)
}
ext2, err := proto.GetExtension(m, pb.E_Ext_More)
if err != nil {
t.Fatalf("GetExtension() failed: %s", err)
}
return ext1 == ext2
}
msg := &pb.MyMessage{Count: proto.Int32(4)}
ext0 := &pb.Ext{}
if err := proto.SetExtension(msg, pb.E_Ext_More, ext0); err != nil {
t.Fatalf("Could not set ext1: %s", ext0)
}
if !check(msg) {
t.Errorf("GetExtension() not stable before marshaling")
}
bb, err := proto.Marshal(msg)
if err != nil {
t.Fatalf("Marshal() failed: %s", err)
}
msg1 := &pb.MyMessage{}
err = proto.Unmarshal(bb, msg1)
if err != nil {
t.Fatalf("Unmarshal() failed: %s", err)
}
if !check(msg1) {
t.Errorf("GetExtension() not stable after unmarshaling")
}
}
func readMsgCtx(ctx context.Context, r msgio.Reader, p proto.Message) ([]byte, error) {
var msg []byte
// read in a goroutine so we can exit when our context is cancelled.
done := make(chan error)
go func() {
var err error
msg, err = r.ReadMsg()
select {
case done <- err:
case <-ctx.Done():
}
}()
select {
case <-ctx.Done():
return nil, ctx.Err()
case e := <-done:
if e != nil {
return nil, e
}
}
return msg, proto.Unmarshal(msg, p)
}
// UnmarshalPrivateKey converts a protobuf serialized private key into its
// representative object
func UnmarshalPrivateKey(data []byte) (PrivKey, error) {
pmes := new(pb.PrivateKey)
err := proto.Unmarshal(data, pmes)
if err != nil {
return nil, err
}
switch pmes.GetType() {
case pb.KeyType_RSA:
return UnmarshalRsaPrivateKey(pmes.GetData())
default:
return nil, ErrBadKeyType
}
}
func getRoutingProviders(ds datastore.Datastore, k key.Key) ([]*dhtpb.Message_Peer, error) {
e := log.EventBegin(context.Background(), "getProviders", &k)
defer e.Done()
var providers []*dhtpb.Message_Peer
if v, err := ds.Get(providerKey(k)); err == nil {
if data, ok := v.([]byte); ok {
var msg dhtpb.Message
if err := proto.Unmarshal(data, &msg); err != nil {
return nil, err
}
providers = append(providers, msg.GetProviderPeers()...)
}
}
return providers, nil
}
func TestPBNodeVerboseEqual(t *testing.T) {
popr := math_rand.New(math_rand.NewSource(time.Now().UnixNano()))
p := NewPopulatedPBNode(popr, false)
data, err := github_com_gogo_protobuf_proto.Marshal(p)
if err != nil {
panic(err)
}
msg := &PBNode{}
if err := github_com_gogo_protobuf_proto.Unmarshal(data, msg); err != nil {
panic(err)
}
if err := p.VerboseEqual(msg); err != nil {
t.Fatalf("%#v !VerboseEqual %#v, since %v", msg, p, err)
}
}
func getRoutingRecord(ds datastore.Datastore, k key.Key) (*dhtpb.Record, error) {
dskey := k.DsKey()
val, err := ds.Get(dskey)
if err != nil {
return nil, err
}
recordBytes, ok := val.([]byte)
if !ok {
return nil, fmt.Errorf("datastore had non byte-slice value for %v", dskey)
}
var record dhtpb.Record
if err := proto.Unmarshal(recordBytes, &record); err != nil {
return nil, errors.New("failed to unmarshal dht record from datastore")
}
return &record, nil
}
func (this *uint32Reader) ReadMsg(msg proto.Message) error {
if _, err := io.ReadFull(this.r, this.lenBuf); err != nil {
return err
}
length32 := this.byteOrder.Uint32(this.lenBuf)
length := int(length32)
if length < 0 || length > this.maxSize {
return io.ErrShortBuffer
}
if length >= len(this.buf) {
this.buf = make([]byte, length)
}
_, err := io.ReadFull(this.r, this.buf[:length])
if err != nil {
return err
}
return proto.Unmarshal(this.buf[:length], msg)
}
func (c *offlineRouting) GetValue(ctx context.Context, key key.Key) ([]byte, error) {
v, err := c.datastore.Get(key.DsKey())
if err != nil {
return nil, err
}
byt, ok := v.([]byte)
if !ok {
return nil, errors.New("value stored in datastore not []byte")
}
rec := new(pb.Record)
err = proto.Unmarshal(byt, rec)
if err != nil {
return nil, err
}
return rec.GetValue(), nil
}
func (this *varintReader) ReadMsg(msg proto.Message) error {
length64, err := binary.ReadUvarint(this.r)
if err != nil {
return err
}
length := int(length64)
if length < 0 || length > this.maxSize {
return io.ErrShortBuffer
}
if len(this.buf) < length {
this.buf = make([]byte, length)
}
buf := this.buf[:length]
if _, err := io.ReadFull(this.r, buf); err != nil {
return err
}
return proto.Unmarshal(buf, msg)
}
func BenchmarkPBLinkProtoUnmarshal(b *testing.B) {
popr := math_rand.New(math_rand.NewSource(616))
total := 0
datas := make([][]byte, 10000)
for i := 0; i < 10000; i++ {
data, err := github_com_gogo_protobuf_proto.Marshal(NewPopulatedPBLink(popr, false))
if err != nil {
panic(err)
}
datas[i] = data
}
msg := &PBLink{}
b.ResetTimer()
for i := 0; i < b.N; i++ {
total += len(datas[i%10000])
if err := github_com_gogo_protobuf_proto.Unmarshal(datas[i%10000], msg); err != nil {
panic(err)
}
}
b.SetBytes(int64(total / b.N))
}
func (dht *IpfsDHT) handleGetValue(ctx context.Context, p peer.ID, pmes *pb.Message) (*pb.Message, error) {
defer log.EventBegin(ctx, "handleGetValue", p).Done()
log.Debugf("%s handleGetValue for key: %s", dht.self, pmes.GetKey())
// setup response
resp := pb.NewMessage(pmes.GetType(), pmes.GetKey(), pmes.GetClusterLevel())
// first, is there even a key?
k := pmes.GetKey()
if k == "" {
return nil, errors.New("handleGetValue but no key was provided")
// TODO: send back an error response? could be bad, but the other node's hanging.
}
// let's first check if we have the value locally.
log.Debugf("%s handleGetValue looking into ds", dht.self)
dskey := key.Key(k).DsKey()
iVal, err := dht.datastore.Get(dskey)
log.Debugf("%s handleGetValue looking into ds GOT %v", dht.self, iVal)
// if we got an unexpected error, bail.
if err != nil && err != ds.ErrNotFound {
return nil, err
}
// if we have the value, send it back
if err == nil {
log.Debugf("%s handleGetValue success!", dht.self)
byts, ok := iVal.([]byte)
if !ok {
return nil, fmt.Errorf("datastore had non byte-slice value for %v", dskey)
}
rec := new(pb.Record)
err := proto.Unmarshal(byts, rec)
if err != nil {
log.Debug("Failed to unmarshal dht record from datastore")
return nil, err
}
resp.Record = rec
}
// Find closest peer on given cluster to desired key and reply with that info
closer := dht.betterPeersToQuery(pmes, p, CloserPeerCount)
if len(closer) > 0 {
closerinfos := peer.PeerInfos(dht.peerstore, closer)
for _, pi := range closerinfos {
log.Debugf("handleGetValue returning closer peer: '%s'", pi.ID)
if len(pi.Addrs) < 1 {
log.Errorf(`no addresses on peer being sent!
[local:%s]
[sending:%s]
[remote:%s]`, dht.self, pi.ID, p)
}
}
resp.CloserPeers = pb.PeerInfosToPBPeers(dht.host.Network(), closerinfos)
}
return resp, nil
}
