func EchoStreamHandler(stream inet.Stream) {
go func() {
defer stream.Close()
// pull out the ipfs conn
c := stream.Conn()
log.Infof("%s ponging to %s", c.LocalPeer(), c.RemotePeer())
buf := make([]byte, 4)
for {
if _, err := stream.Read(buf); err != nil {
if err != io.EOF {
log.Info("ping receive error:", err)
}
return
}
if !bytes.Equal(buf, []byte("ping")) {
log.Infof("ping receive error: ping != %s %v", buf, buf)
return
}
if _, err := stream.Write([]byte("pong")); err != nil {
log.Info("pond send error:", err)
return
}
}
}()
}
//WriteResponse writes hash of recent to con.
func WriteResponse(con net.Stream, recent key.Key) error {
var r []byte
if recent != "" {
r = []byte(recent)
}
msg := &NodeProto{
Id: r,
}
dat, err := proto.Marshal(msg)
if log.If(err) {
return err
}
_, err = con.Write(dat)
log.If(err)
return err
}
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
}
}
}
//WriteRequest writes hash of recent and peers DAG to con.
func WriteRequest(con net.Stream, recent key.Key, peers key.Key) error {
var r, p []byte
if peers != "" {
p = []byte(peers)
}
if recent != "" {
r = []byte(recent)
}
msg := &Msg{
Type: Type_Recent.Enum(),
Recent: r,
Peers: p,
}
dat, err := proto.Marshal(msg)
if log.If(err) {
return err
}
_, err = con.Write(dat)
log.If(err)
return err
}
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
}