func (n *Node) respondGetData(m *msg.Msg, conn net.Conn) {
hashes, err := payload.GetDataDecode(payload.ProtocolVersion, m.Payload())
if err != nil {
n.Log.Printf("[ERR] failed to decode getdata payload from %v (%v)", conn.RemoteAddr(), err)
return
}
for _, sum := range hashes {
s := fmt.Sprint("%x", sum)
if data, ok := n.MyInv[s]; ok {
if _, err := conn.Write(data); err != nil {
n.Log.Printf("[ERR] failed to send all requested objects to %v (%v)", conn.RemoteAddr(), err)
break
}
} else {
n.Log.Printf("[ERR] %v requested object we don't have", conn.RemoteAddr())
}
}
n.Log.Printf("[INFO] sent %v requested objects to %v", len(hashes), conn.RemoteAddr())
}
func (n *Node) versionSequence(m *msg.Msg, conn net.Conn) {
resp := &VerDat{}
defer func() {
if r := recover(); r != nil {
resp.Err = fmt.Errorf("[ERR] version sequence did not complete (%v)", r)
n.Log.Print(resp.Err)
}
}()
var err error
n.Log.Printf("[INFO] version sequence with %v", conn.RemoteAddr())
resp.Ver, err = payload.VersionDecode(m.Payload())
if err != nil {
panic(err)
}
defer func() { n.VerIn <- resp }()
if _, err := conn.Write(msg.New(msg.Cverack, []byte{}).Encode()); err != nil {
panic(err)
}
n.verOutVerackIn(conn, resp.Ver.FromAddr, resp.Ver.Protocol())
n.sendInvAndAddr(conn, resp.Ver.Protocol())
// wait for addr and inv messages
m = msg.Must(msg.ReadKind(conn, msg.Caddr))
resp.Peers, err = payload.AddrDecode(resp.Ver.Protocol(), m.Payload())
if err != nil {
panic(err)
}
m = msg.Must(msg.ReadKind(conn, msg.Cinv))
resp.Inv, err = payload.InventoryDecode(resp.Ver.Protocol(), m.Payload())
if err != nil {
panic(err)
}
n.Log.Printf("[INFO] version sequence with %v successful", conn.RemoteAddr())
}