func NetworkTick() {
if common.IsListenTCP() {
if !TCPServerStarted {
TCPServerStarted = true
go tcp_server()
}
}
Mutex_net.Lock()
conn_cnt := OutConsActive
Mutex_net.Unlock()
if next_drop_slowest.IsZero() {
next_drop_slowest = time.Now().Add(DropSlowestEvery)
} else if conn_cnt >= atomic.LoadUint32(&common.CFG.Net.MaxOutCons) {
// Having max number of outgoing connections, check to drop the slowest one
if time.Now().After(next_drop_slowest) {
drop_slowest_peer()
next_drop_slowest = time.Now().Add(DropSlowestEvery)
}
}
// hammering protection - expire recently disconnected
if next_clean_hammers.IsZero() {
next_clean_hammers = time.Now().Add(HammeringMinReconnect)
} else if time.Now().After(next_clean_hammers) {
HammeringMutex.Lock()
for k, t := range RecentlyDisconencted {
if time.Now().Sub(t) >= HammeringMinReconnect {
delete(RecentlyDisconencted, k)
}
}
HammeringMutex.Unlock()
ExpireCachedBlocks()
next_clean_hammers = time.Now().Add(HammeringMinReconnect)
}
for conn_cnt < atomic.LoadUint32(&common.CFG.Net.MaxOutCons) {
adrs := peersdb.GetBestPeers(16, ConnectionActive)
if len(adrs) == 0 {
common.LockCfg()
if common.CFG.ConnectOnly == "" && common.DebugLevel > 0 {
println("no new peers", len(OpenCons), conn_cnt)
}
common.UnlockCfg()
break
}
DoNetwork(adrs[rand.Int31n(int32(len(adrs)))])
Mutex_net.Lock()
conn_cnt = OutConsActive
Mutex_net.Unlock()
}
}
// Process that handles communication with a single peer
func (c *OneConnection) Run() {
c.SendVersion()
c.Mutex.Lock()
c.LastDataGot = time.Now()
c.NextBlocksAsk = time.Now() // ask for blocks ASAP
c.NextGetAddr = time.Now() // do getaddr ~10 seconds from now
c.NextPing = time.Now().Add(5 * time.Second) // do first ping ~5 seconds from now
c.Mutex.Unlock()
for !c.IsBroken() {
c.Mutex.Lock()
c.LoopCnt++
c.Mutex.Unlock()
cmd := c.FetchMessage()
if c.IsBroken() {
break
}
// Timeout ping in progress
if c.PingInProgress != nil && time.Now().After(c.LastPingSent.Add(PingTimeout)) {
if common.DebugLevel > 0 {
println(c.PeerAddr.Ip(), "ping timeout")
}
common.CountSafe("PingTimeout")
c.HandlePong() // this will set LastPingSent to nil
}
if cmd == nil {
c.Tick()
continue
}
c.Mutex.Lock()
c.LastDataGot = time.Now()
c.LastCmdRcvd = cmd.cmd
c.LastBtsRcvd = uint32(len(cmd.pl))
c.Mutex.Unlock()
c.PeerAddr.Alive()
if common.DebugLevel < 0 {
fmt.Println(c.PeerAddr.Ip(), "->", cmd.cmd, len(cmd.pl))
}
if c.Send.Buf != nil && len(c.Send.Buf) > SendBufSizeHoldOn {
common.CountSafe("hold_" + cmd.cmd)
common.CountSafeAdd("hbts_"+cmd.cmd, uint64(len(cmd.pl)))
continue
}
common.CountSafe("rcvd_" + cmd.cmd)
common.CountSafeAdd("rbts_"+cmd.cmd, uint64(len(cmd.pl)))
switch cmd.cmd {
case "version":
er := c.HandleVersion(cmd.pl)
if er != nil {
println("version:", er.Error())
c.Disconnect()
}
case "verack":
c.VerackReceived = true
if common.IsListenTCP() {
c.SendOwnAddr()
}
case "inv":
c.ProcessInv(cmd.pl)
case "tx":
if common.CFG.TXPool.Enabled {
c.ParseTxNet(cmd.pl)
}
case "addr":
ParseAddr(cmd.pl)
case "block": //block received
netBlockReceived(c, cmd.pl)
case "getblocks":
c.GetBlocks(cmd.pl)
case "getdata":
c.ProcessGetData(cmd.pl)
case "getaddr":
c.SendAddr()
case "alert":
c.HandleAlert(cmd.pl)
case "ping":
re := make([]byte, len(cmd.pl))
copy(re, cmd.pl)
c.SendRawMsg("pong", re)
case "pong":
if c.PingInProgress == nil {
common.CountSafe("PongUnexpected")
} else if bytes.Equal(cmd.pl, c.PingInProgress) {
c.HandlePong()
} else {
common.CountSafe("PongMismatch")
}
case "getheaders":
c.GetHeaders(cmd.pl)
case "notfound":
common.CountSafe("NotFound")
default:
if common.DebugLevel > 0 {
println(cmd.cmd, "from", c.PeerAddr.Ip())
}
}
}
c.Mutex.Lock()
ban := c.banit
c.Mutex.Unlock()
if ban {
c.PeerAddr.Ban()
common.CountSafe("PeersBanned")
} else if c.Incoming {
HammeringMutex.Lock()
RecentlyDisconencted[c.PeerAddr.NetAddr.Ip4] = time.Now()
HammeringMutex.Unlock()
}
if common.DebugLevel > 0 {
println("Disconnected from", c.PeerAddr.Ip())
}
c.NetConn.Close()
}
func p_cfg(w http.ResponseWriter, r *http.Request) {
if !ipchecker(r) {
return
}
common.LockCfg()
defer common.UnlockCfg()
if r.Method == "POST" {
if len(r.Form["configjson"]) > 0 {
e := json.Unmarshal([]byte(r.Form["configjson"][0]), &common.CFG)
if e == nil {
common.Reset()
}
if len(r.Form["save"]) > 0 {
common.SaveConfig()
}
http.Redirect(w, r, "/", http.StatusFound)
return
}
if len(r.Form["walletdata"]) > 0 && len(r.Form["walletfname"]) > 0 {
fn := r.Form["walletfname"][0]
if fn != "" {
fn = common.GocoinHomeDir + "wallet" + string(os.PathSeparator) + fn
ioutil.WriteFile(fn, []byte(r.Form["walletdata"][0]), 0660)
wallet.LoadWallet(fn)
}
http.Redirect(w, r, "/wal", http.StatusFound)
return
}
if len(r.Form["shutdown"]) > 0 {
usif.Exit_now = true
w.Write([]byte("Your node should shut down soon"))
return
}
return
}
// for any other GET we need a matching session-id
if !checksid(r) {
new_session_id(w)
return
}
if len(r.Form["txponoff"]) > 0 {
common.CFG.TXPool.Enabled = !common.CFG.TXPool.Enabled
http.Redirect(w, r, "txs", http.StatusFound)
return
}
if len(r.Form["txronoff"]) > 0 {
common.CFG.TXRoute.Enabled = !common.CFG.TXRoute.Enabled
http.Redirect(w, r, "txs", http.StatusFound)
return
}
if len(r.Form["lonoff"]) > 0 {
common.SetListenTCP(common.IsListenTCP(), true)
http.Redirect(w, r, "net", http.StatusFound)
return
}
if len(r.Form["drop"]) > 0 {
network.DropPeer(r.Form["drop"][0])
http.Redirect(w, r, "net", http.StatusFound)
return
}
if len(r.Form["savecfg"]) > 0 {
dat, _ := json.Marshal(&common.CFG)
if dat != nil {
ioutil.WriteFile(common.ConfigFile, dat, 0660)
}
http.Redirect(w, r, "/", http.StatusFound)
return
}
if len(r.Form["beepblock"]) > 0 {
common.CFG.Beeps.NewBlock = !common.CFG.Beeps.NewBlock
http.Redirect(w, r, "/", http.StatusFound)
return
}
if len(r.Form["freemem"]) > 0 {
sys.FreeMem()
http.Redirect(w, r, "/", http.StatusFound)
return
}
if len(r.Form["mid"]) > 0 {
v, e := strconv.ParseUint(r.Form["mid"][0], 10, 32)
if e == nil && v < uint64(len(common.MinerIds)) {
common.CFG.Beeps.MinerID = string(common.MinerIds[v].Tag)
} else {
common.CFG.Beeps.MinerID = ""
}
http.Redirect(w, r, "miners", http.StatusFound)
return
}
}
// TCP server
func tcp_server() {
ad, e := net.ResolveTCPAddr("tcp4", fmt.Sprint("0.0.0.0:", common.DefaultTcpPort))
if e != nil {
println("ResolveTCPAddr", e.Error())
return
}
lis, e := net.ListenTCP("tcp4", ad)
if e != nil {
println("ListenTCP", e.Error())
return
}
defer lis.Close()
//fmt.Println("TCP server started at", ad.String())
for common.IsListenTCP() {
common.CountSafe("NetServerLoops")
Mutex_net.Lock()
ica := InConsActive
Mutex_net.Unlock()
if ica < atomic.LoadUint32(&common.CFG.Net.MaxInCons) {
lis.SetDeadline(time.Now().Add(time.Second))
tc, e := lis.AcceptTCP()
if e == nil {
var terminate bool
if common.DebugLevel > 0 {
fmt.Println("Incoming connection from", tc.RemoteAddr().String())
}
ad, e := peersdb.NewPeerFromString(tc.RemoteAddr().String())
if e == nil {
// Hammering protection
HammeringMutex.Lock()
ti, ok := RecentlyDisconencted[ad.NetAddr.Ip4]
HammeringMutex.Unlock()
if ok && time.Now().Sub(ti) < HammeringMinReconnect {
//println(ad.Ip(), "is hammering within", time.Now().Sub(ti).String())
common.CountSafe("InConnHammer")
ad.Ban()
terminate = true
}
if !terminate {
// Incoming IP passed all the initial checks - talk to it
conn := NewConnection(ad)
conn.ConnectedAt = time.Now()
conn.Incoming = true
conn.NetConn = tc
Mutex_net.Lock()
if _, ok := OpenCons[ad.UniqID()]; ok {
//fmt.Println(ad.Ip(), "already connected")
common.CountSafe("SameIpReconnect")
Mutex_net.Unlock()
terminate = true
} else {
OpenCons[ad.UniqID()] = conn
InConsActive++
Mutex_net.Unlock()
go func() {
conn.Run()
Mutex_net.Lock()
delete(OpenCons, ad.UniqID())
InConsActive--
Mutex_net.Unlock()
}()
}
}
} else {
if common.DebugLevel > 0 {
println("NewPeerFromString:", e.Error())
}
common.CountSafe("InConnRefused")
terminate = true
}
// had any error occured - close teh TCP connection
if terminate {
tc.Close()
}
}
} else {
time.Sleep(1e9)
}
}
Mutex_net.Lock()
for _, c := range OpenCons {
if c.Incoming {
c.Disconnect()
}
}
TCPServerStarted = false
Mutex_net.Unlock()
//fmt.Println("TCP server stopped")
}
func p_net(w http.ResponseWriter, r *http.Request) {
if !ipchecker(r) {
return
}
net_page := load_template("net.html")
net_row := load_template("net_row.html")
network.Mutex_net.Lock()
srt := make(network.SortedKeys, len(network.OpenCons))
cnt := 0
for k, v := range network.OpenCons {
if !v.IsBroken() {
srt[cnt].Key = k
srt[cnt].ConnID = v.ConnID
cnt++
}
}
sort.Sort(srt)
net_page = strings.Replace(net_page, "{OUT_CONNECTIONS}", fmt.Sprint(network.OutConsActive), 1)
net_page = strings.Replace(net_page, "{IN_CONNECTIONS}", fmt.Sprint(network.InConsActive), 1)
net_page = strings.Replace(net_page, "{LISTEN_TCP}", fmt.Sprint(common.IsListenTCP(), network.TCPServerStarted), 1)
net_page = strings.Replace(net_page, "{EXTERNAL_ADDR}", btc.NewNetAddr(network.BestExternalAddr()).String(), 1)
for idx := range srt {
v := network.OpenCons[srt[idx].Key]
s := net_row
v.Mutex.Lock()
s = strings.Replace(s, "{CONNID}", fmt.Sprint(v.ConnID), -1)
if v.Incoming {
s = strings.Replace(s, "{CONN_DIR_ICON}", "<img src=\"webui/incoming.png\">", 1)
} else {
s = strings.Replace(s, "{CONN_DIR_ICON}", "<img src=\"webui/outgoing.png\">", 1)
}
s = strings.Replace(s, "{PEER_ADDR}", v.PeerAddr.Ip(), 1)
s = strings.Replace(s, "{PERR_PING}", fmt.Sprint(v.GetAveragePing()), 1)
s = strings.Replace(s, "{LAST_RCVD_LEN}", fmt.Sprint(v.LastBtsRcvd), 1)
s = strings.Replace(s, "{LAST_RCVD_CMD}", v.LastCmdRcvd, 1)
s = strings.Replace(s, "{LAST_SENT_LEN}", fmt.Sprint(v.LastBtsSent), 1)
s = strings.Replace(s, "{LAST_SENT_CNT}", v.LastCmdSent, 1)
s = strings.Replace(s, "{TOTAL_RCVD}", common.BytesToString(v.BytesReceived), 1)
s = strings.Replace(s, "{TOTAL_SENT}", common.BytesToString(v.BytesSent), 1)
s = strings.Replace(s, "{NODE_VERSION}", fmt.Sprint(v.Node.Version), 1)
s = strings.Replace(s, "{USER_AGENT}", v.Node.Agent, 1)
if v.Send.Buf != nil {
s = strings.Replace(s, "<!--SENDBUF-->", common.BytesToString(uint64(len(v.Send.Buf))), 1)
}
if len(v.GetBlockInProgress) > 0 {
s = strings.Replace(s, "<!--BLKSINPROG-->", fmt.Sprint(len(v.GetBlockInProgress), "blks "), 1)
}
v.Mutex.Unlock()
net_page = templ_add(net_page, "<!--PEER_ROW-->", s)
}
network.Mutex_net.Unlock()
write_html_head(w, r)
w.Write([]byte(net_page))
write_html_tail(w)
}