func (d *Diagnostics) HandleMessage(ctx context.Context, s inet.Stream) error {
cr := ctxio.NewReader(ctx, s)
cw := ctxio.NewWriter(ctx, s)
r := ggio.NewDelimitedReader(cr, inet.MessageSizeMax) // maxsize
w := ggio.NewDelimitedWriter(cw)
// deserialize msg
pmes := new(pb.Message)
if err := r.ReadMsg(pmes); err != nil {
log.Debugf("Failed to decode protobuf message: %v", err)
return nil
}
// Print out diagnostic
log.Infof("[peer: %s] Got message from [%s]\n",
d.self.Pretty(), s.Conn().RemotePeer())
// Make sure we havent already handled this request to prevent loops
if err := d.startDiag(pmes.GetDiagID()); err != nil {
return nil
}
resp := newMessage(pmes.GetDiagID())
resp.Data = d.getDiagInfo().Marshal()
if err := w.WriteMsg(resp); err != nil {
log.Debugf("Failed to write protobuf message over stream: %s", err)
return err
}
timeout := pmes.GetTimeoutDuration()
if timeout < HopTimeoutDecrement {
return fmt.Errorf("timeout too short: %s", timeout)
}
ctx, cancel := context.WithTimeout(ctx, timeout)
defer cancel()
pmes.SetTimeoutDuration(timeout - HopTimeoutDecrement)
dpeers, err := d.getDiagnosticFromPeers(ctx, d.getPeers(), pmes)
if err != nil {
log.Debugf("diagnostic from peers err: %s", err)
return err
}
for b := range dpeers {
resp := newMessage(pmes.GetDiagID())
resp.Data = b.Marshal()
if err := w.WriteMsg(resp); err != nil {
log.Debugf("Failed to write protobuf message over stream: %s", err)
return err
}
}
return nil
}
func (ids *IDService) ResponseHandler(s inet.Stream) {
defer s.Close()
c := s.Conn()
r := ggio.NewDelimitedReader(s, 2048)
mes := pb.Identify{}
if err := r.ReadMsg(&mes); err != nil {
return
}
ids.consumeMessage(&mes, c)
log.Debugf("%s received message from %s %s", ID,
c.RemotePeer(), c.RemoteMultiaddr())
}
// HandleSync reads the next name off the Stream, and calls a handler function
// This is done synchronously. The handler function will return before
// HandleSync returns.
func (m *Mux) HandleSync(s inet.Stream) {
ctx := context.Background()
name, handler, err := m.ReadHeader(s)
if err != nil {
err = fmt.Errorf("protocol mux error: %s", err)
log.Event(ctx, "muxError", lgbl.Error(err))
s.Close()
return
}
log.Debugf("muxer handle protocol %s: %s", s.Conn().RemotePeer(), name)
handler(s)
}
// newStreamHandler is the remote-opened stream handler for inet.Network
// TODO: this feels a bit wonky
func (h *BasicHost) newStreamHandler(s inet.Stream) {
protoID, handle, err := h.Mux().ReadHeader(s)
if err != nil {
if err == io.EOF {
log.Debugf("protocol EOF: %s", s.Conn().RemotePeer())
} else {
log.Warning("protocol mux failed: %s", err)
}
return
}
logStream := mstream.WrapStream(s, protoID, h.bwc)
go handle(logStream)
}
func (dht *IpfsDHT) handleNewMessage(s inet.Stream) {
defer s.Close()
ctx := dht.Context()
cr := ctxio.NewReader(ctx, s) // ok to use. we defer close stream in this func
cw := ctxio.NewWriter(ctx, s) // ok to use. we defer close stream in this func
r := ggio.NewDelimitedReader(cr, inet.MessageSizeMax)
w := ggio.NewDelimitedWriter(cw)
mPeer := s.Conn().RemotePeer()
// receive msg
pmes := new(pb.Message)
if err := r.ReadMsg(pmes); err != nil {
log.Debugf("Error unmarshaling data: %s", err)
return
}
// update the peer (on valid msgs only)
dht.updateFromMessage(ctx, mPeer, pmes)
// get handler for this msg type.
handler := dht.handlerForMsgType(pmes.GetType())
if handler == nil {
log.Debug("got back nil handler from handlerForMsgType")
return
}
// dispatch handler.
rpmes, err := handler(ctx, mPeer, pmes)
if err != nil {
log.Debugf("handle message error: %s", err)
return
}
// if nil response, return it before serializing
if rpmes == nil {
log.Debug("Got back nil response from request.")
return
}
// send out response msg
if err := w.WriteMsg(rpmes); err != nil {
log.Debugf("send response error: %s", err)
return
}
return
}
func (p *PingService) PingHandler(s inet.Stream) {
buf := make([]byte, PingSize)
for {
_, err := io.ReadFull(s, buf)
if err != nil {
log.Debug(err)
return
}
_, err = s.Write(buf)
if err != nil {
log.Debug(err)
return
}
}
}
func ping(s inet.Stream) (time.Duration, error) {
buf := make([]byte, PingSize)
u.NewTimeSeededRand().Read(buf)
before := time.Now()
_, err := s.Write(buf)
if err != nil {
return 0, err
}
rbuf := make([]byte, PingSize)
_, err = io.ReadFull(s, rbuf)
if err != nil {
return 0, err
}
if !bytes.Equal(buf, rbuf) {
return 0, errors.New("ping packet was incorrect!")
}
return time.Now().Sub(before), nil
}
// handleStream is our own handler, which returns an error for simplicity.
func (rs *RelayService) handleStream(s inet.Stream) error {
defer s.Close()
// read the header (src and dst peer.IDs)
src, dst, err := ReadHeader(s)
if err != nil {
return fmt.Errorf("stream with bad header: %s", err)
}
local := rs.host.ID()
switch {
case src == local:
return fmt.Errorf("relaying from self")
case dst == local: // it's for us! yaaay.
log.Debugf("%s consuming stream from %s", local, src)
return rs.consumeStream(s)
default: // src and dst are not local. relay it.
log.Debugf("%s relaying stream %s <--> %s", local, src, dst)
return rs.pipeStream(src, dst, s)
}
}
// handleNewStream receives a new stream from the network.
func (bsnet *impl) handleNewStream(s inet.Stream) {
defer s.Close()
if bsnet.receiver == nil {
return
}
received, err := bsmsg.FromNet(s)
if err != nil {
go bsnet.receiver.ReceiveError(err)
log.Debugf("bitswap net handleNewStream from %s error: %s", s.Conn().RemotePeer(), err)
return
}
p := s.Conn().RemotePeer()
ctx := context.Background()
log.Debugf("bitswap net handleNewStream from %s", s.Conn().RemotePeer())
bsnet.receiver.ReceiveMessage(ctx, p, received)
}
func (ids *IDService) RequestHandler(s inet.Stream) {
defer s.Close()
c := s.Conn()
bwc := ids.Host.GetBandwidthReporter()
s = mstream.WrapStream(s, ID, bwc)
w := ggio.NewDelimitedWriter(s)
mes := pb.Identify{}
ids.populateMessage(&mes, s.Conn())
w.WriteMsg(&mes)
log.Debugf("%s sent message to %s %s", ID,
c.RemotePeer(), c.RemoteMultiaddr())
}
func (d *Diagnostics) handleNewStream(s inet.Stream) {
d.HandleMessage(context.Background(), s)
s.Close()
}
func (p *standard) HandleStream(s inet.Stream) {
// TODO(brian): Should clients be able to satisfy requests?
log.Error("supernode client received (dropped) a routing message from", s.Conn().RemotePeer())
s.Close()
}