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 (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
}
// 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 (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()
}