func (c *oneConnection) VerMsg(pl []byte) error {
if len(pl) >= 46 {
c.node.version = binary.LittleEndian.Uint32(pl[0:4])
c.node.services = binary.LittleEndian.Uint64(pl[4:12])
c.node.timestamp = binary.LittleEndian.Uint64(pl[12:20])
if MyExternalAddr == nil {
MyExternalAddr = btc.NewNetAddr(pl[20:46]) // These bytes should know our external IP
MyExternalAddr.Port = DefaultTcpPort
}
if len(pl) >= 86 {
//fmt.Println("From:", btc.NewNetAddr(pl[46:72]).String())
//fmt.Println("Nonce:", hex.EncodeToString(pl[72:80]))
le, of := btc.VLen(pl[80:])
of += 80
c.node.agent = string(pl[of : of+le])
of += le
if len(pl) >= of+4 {
c.node.height = binary.LittleEndian.Uint32(pl[of : of+4])
/*of += 4
if len(pl) >= of+1 {
fmt.Println("Relay:", pl[of])
}*/
}
}
} else {
return errors.New("Version message too short")
}
c.SendRawMsg("verack", []byte{})
if c.listen {
c.SendVersion()
}
return nil
}
func (c *OneConnection) ProcessInv(pl []byte) {
if len(pl) < 37 {
println(c.PeerAddr.Ip(), "inv payload too short", len(pl))
return
}
c.InvsRecieved++
cnt, of := btc.VLen(pl)
if len(pl) != of+36*cnt {
println("inv payload length mismatch", len(pl), of, cnt)
}
var blinv2ask []byte
for i := 0; i < cnt; i++ {
typ := binary.LittleEndian.Uint32(pl[of : of+4])
common.CountSafe(fmt.Sprint("InvGot", typ))
if typ == 2 {
if blockWanted(pl[of+4 : of+36]) {
blinv2ask = append(blinv2ask, pl[of+4:of+36]...)
}
} else if typ == 1 {
if common.CFG.TXPool.Enabled {
c.TxInvNotify(pl[of+4 : of+36])
}
}
of += 36
}
if len(blinv2ask) > 0 {
bu := new(bytes.Buffer)
btc.WriteVlen(bu, uint32(len(blinv2ask)/32))
for i := 0; i < len(blinv2ask); i += 32 {
bh := btc.NewUint256(blinv2ask[i : i+32])
c.Mutex.Lock()
c.GetBlockInProgress[bh.BIdx()] = &oneBlockDl{hash: bh, start: time.Now()}
c.Mutex.Unlock()
binary.Write(bu, binary.LittleEndian, uint32(2))
bu.Write(bh.Hash[:])
}
c.SendRawMsg("getdata", bu.Bytes())
}
return
}
func (c *oneConnection) ProcessInv(pl []byte) {
if len(pl) < 37 {
println("inv payload too short")
return
}
cnt, of := btc.VLen(pl)
if len(pl) != of+36*cnt {
println("inv payload length mismatch", len(pl), of, cnt)
}
var blocks2get [][32]byte
var txs uint32
for i := 0; i < cnt; i++ {
typ := binary.LittleEndian.Uint32(pl[of : of+4])
if typ == 2 {
if InvsNotify(pl[of+4 : of+36]) {
var inv [32]byte
copy(inv[:], pl[of+4:of+36])
blocks2get = append(blocks2get, inv)
}
} else {
txs++
}
of += 36
}
if dbg > 1 {
println(c.addr.Ip(), "ProcessInv:", cnt, "tot /", txs, "txs -> get", len(blocks2get), "blocks")
}
if len(blocks2get) > 0 {
msg := make([]byte, 9 /*maxvlen*/ +len(blocks2get)*36)
le := btc.PutVlen(msg, len(blocks2get))
for i := range blocks2get {
binary.LittleEndian.PutUint32(msg[le:le+4], 2)
copy(msg[le+4:le+36], blocks2get[i][:])
le += 36
}
if dbg > 0 {
println("getdata for", len(blocks2get), "/", cnt, "blocks", le)
}
c.SendRawMsg("getdata", msg[:le])
}
return
}
func (c *OneConnection) HandleVersion(pl []byte) error {
if len(pl) >= 80 /*Up to, includiong, the nonce */ {
c.Mutex.Lock()
c.Node.Version = binary.LittleEndian.Uint32(pl[0:4])
if bytes.Equal(pl[72:80], nonce[:]) {
c.Mutex.Unlock()
return errors.New("Connecting to ourselves")
}
if c.Node.Version < MIN_PROTO_VERSION {
c.Mutex.Unlock()
return errors.New("Client version too low")
}
c.Node.Services = binary.LittleEndian.Uint64(pl[4:12])
c.Node.Timestamp = binary.LittleEndian.Uint64(pl[12:20])
c.Mutex.Unlock()
if ValidIp4(pl[40:44]) {
ExternalIpMutex.Lock()
ip4 := binary.BigEndian.Uint32(pl[40:44])
ExternalIp4[ip4] = [2]uint{ExternalIp4[ip4][0] + 1, uint(time.Now().Unix())}
ExternalIpMutex.Unlock()
}
if len(pl) >= 86 {
c.Mutex.Lock()
le, of := btc.VLen(pl[80:])
of += 80
c.Node.Agent = string(pl[of : of+le])
of += le
if len(pl) >= of+4 {
c.Node.Height = binary.LittleEndian.Uint32(pl[of : of+4])
of += 4
if len(pl) > of && pl[of] == 0 {
c.Node.DoNotRelayTxs = true
}
}
c.Mutex.Unlock()
}
} else {
return errors.New("common.Version message too short")
}
c.SendRawMsg("verack", []byte{})
return nil
}