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improve the stability of xtcp

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This commit is contained in:
fatedier 2019-03-11 15:53:58 +08:00
parent d812488767
commit e691a40260
5 changed files with 151 additions and 97 deletions
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70
client/proxy/proxy.go
View File

@ -20,6 +20,8 @@ import (
"io"
"io/ioutil"
"net"
"strconv"
"strings"
"sync"
"time"
@ -280,25 +282,56 @@ func (pxy *XtcpProxy) InWorkConn(conn frpNet.Conn) {
return
}
pxy.Trace("get natHoleRespMsg, sid [%s], client address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr)
pxy.Trace("get natHoleRespMsg, sid [%s], client address [%s] visitor address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr, natHoleRespMsg.VisitorAddr)
// Send sid to visitor udp address.
time.Sleep(time.Second)
// Send detect message
array := strings.Split(natHoleRespMsg.VisitorAddr, ":")
if len(array) <= 1 {
pxy.Error("get NatHoleResp visitor address error: %v", natHoleRespMsg.VisitorAddr)
}
laddr, _ := net.ResolveUDPAddr("udp", clientConn.LocalAddr().String())
daddr, err := net.ResolveUDPAddr("udp", natHoleRespMsg.VisitorAddr)
/*
for i := 1000; i < 65000; i++ {
pxy.sendDetectMsg(array[0], int64(i), laddr, "a")
}
*/
port, err := strconv.ParseInt(array[1], 10, 64)
if err != nil {
pxy.Error("resolve visitor udp address error: %v", err)
pxy.Error("get natHoleResp visitor address error: %v", natHoleRespMsg.VisitorAddr)
return
}
pxy.sendDetectMsg(array[0], int(port), laddr, []byte(natHoleRespMsg.Sid))
pxy.Trace("send all detect msg done")
lConn, err := net.DialUDP("udp", laddr, daddr)
msg.WriteMsg(conn, &msg.NatHoleClientDetectOK{})
// Listen for clientConn's address and wait for visitor connection
lConn, err := net.ListenUDP("udp", laddr)
if err != nil {
pxy.Error("dial visitor udp address error: %v", err)
pxy.Error("listen on visitorConn's local adress error: %v", err)
return
}
lConn.Write([]byte(natHoleRespMsg.Sid))
defer lConn.Close()
kcpConn, err := frpNet.NewKcpConnFromUdp(lConn, true, natHoleRespMsg.VisitorAddr)
lConn.SetReadDeadline(time.Now().Add(8 * time.Second))
sidBuf := pool.GetBuf(1024)
var uAddr *net.UDPAddr
n, uAddr, err = lConn.ReadFromUDP(sidBuf)
if err != nil {
pxy.Warn("get sid from visitor error: %v", err)
return
}
lConn.SetReadDeadline(time.Time{})
if string(sidBuf[:n]) != natHoleRespMsg.Sid {
pxy.Warn("incorrect sid from visitor")
return
}
pool.PutBuf(sidBuf)
pxy.Info("nat hole connection make success, sid [%s]", natHoleRespMsg.Sid)
lConn.WriteToUDP(sidBuf[:n], uAddr)
kcpConn, err := frpNet.NewKcpConnFromUdp(lConn, false, natHoleRespMsg.VisitorAddr)
if err != nil {
pxy.Error("create kcp connection from udp connection error: %v", err)
return
@ -323,6 +356,25 @@ func (pxy *XtcpProxy) InWorkConn(conn frpNet.Conn) {
frpNet.WrapConn(muxConn), []byte(pxy.cfg.Sk))
}
func (pxy *XtcpProxy) sendDetectMsg(addr string, port int, laddr *net.UDPAddr, content []byte) (err error) {
daddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", addr, port))
if err != nil {
return err
}
tConn, err := net.DialUDP("udp", laddr, daddr)
if err != nil {
return err
}
//uConn := ipv4.NewConn(tConn)
//uConn.SetTTL(3)
tConn.Write(content)
tConn.Close()
return nil
}
// UDP
type UdpProxy struct {
*BaseProxy

62
client/visitor.go
View File

@ -20,13 +20,9 @@ import (
"io"
"io/ioutil"
"net"
"strconv"
"strings"
"sync"
"time"
"golang.org/x/net/ipv4"
"github.com/fatedier/frp/g"
"github.com/fatedier/frp/models/config"
"github.com/fatedier/frp/models/msg"
@ -251,42 +247,31 @@ func (sv *XtcpVisitor) handleConn(userConn frpNet.Conn) {
return
}
sv.Trace("get natHoleRespMsg, sid [%s], client address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr)
sv.Trace("get natHoleRespMsg, sid [%s], client address [%s], visitor address [%s]", natHoleRespMsg.Sid, natHoleRespMsg.ClientAddr, natHoleRespMsg.VisitorAddr)
// Close visitorConn, so we can use it's local address.
visitorConn.Close()
// Send detect message.
array := strings.Split(natHoleRespMsg.ClientAddr, ":")
if len(array) <= 1 {
sv.Error("get natHoleResp client address error: %s", natHoleRespMsg.ClientAddr)
return
}
// send sid message to client
laddr, _ := net.ResolveUDPAddr("udp", visitorConn.LocalAddr().String())
/*
for i := 1000; i < 65000; i++ {
sv.sendDetectMsg(array[0], int64(i), laddr, "a")
}
*/
port, err := strconv.ParseInt(array[1], 10, 64)
daddr, err := net.ResolveUDPAddr("udp", natHoleRespMsg.ClientAddr)
if err != nil {
sv.Error("get natHoleResp client address error: %s", natHoleRespMsg.ClientAddr)
sv.Error("resolve client udp address error: %v", err)
return
}
sv.sendDetectMsg(array[0], int(port), laddr, []byte(natHoleRespMsg.Sid))
sv.Trace("send all detect msg done")
// Listen for visitorConn's address and wait for client connection.
lConn, err := net.ListenUDP("udp", laddr)
lConn, err := net.DialUDP("udp", laddr, daddr)
if err != nil {
sv.Error("listen on visitorConn's local adress error: %v", err)
sv.Error("dial client udp address error: %v", err)
return
}
defer lConn.Close()
lConn.SetReadDeadline(time.Now().Add(5 * time.Second))
lConn.Write([]byte(natHoleRespMsg.Sid))
// read ack sid from client
sidBuf := pool.GetBuf(1024)
n, _, err = lConn.ReadFromUDP(sidBuf)
lConn.SetReadDeadline(time.Now().Add(8 * time.Second))
n, err = lConn.Read(sidBuf)
if err != nil {
sv.Warn("get sid from client error: %v", err)
return
@ -296,11 +281,13 @@ func (sv *XtcpVisitor) handleConn(userConn frpNet.Conn) {
sv.Warn("incorrect sid from client")
return
}
sv.Info("nat hole connection make success, sid [%s]", string(sidBuf[:n]))
pool.PutBuf(sidBuf)
sv.Info("nat hole connection make success, sid [%s]", natHoleRespMsg.Sid)
// wrap kcp connection
var remote io.ReadWriteCloser
remote, err = frpNet.NewKcpConnFromUdp(lConn, false, natHoleRespMsg.ClientAddr)
remote, err = frpNet.NewKcpConnFromUdp(lConn, true, natHoleRespMsg.ClientAddr)
if err != nil {
sv.Error("create kcp connection from udp connection error: %v", err)
return
@ -336,22 +323,3 @@ func (sv *XtcpVisitor) handleConn(userConn frpNet.Conn) {
frpIo.Join(userConn, muxConn)
sv.Debug("join connections closed")
}
func (sv *XtcpVisitor) sendDetectMsg(addr string, port int, laddr *net.UDPAddr, content []byte) (err error) {
daddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", addr, port))
if err != nil {
return err
}
tConn, err := net.DialUDP("udp", laddr, daddr)
if err != nil {
return err
}
uConn := ipv4.NewConn(tConn)
uConn.SetTTL(3)
tConn.Write(content)
tConn.Close()
return nil
}

5
models/msg/msg.go
View File

@ -33,6 +33,7 @@ const (
TypeNatHoleVisitor = 'i'
TypeNatHoleClient = 'n'
TypeNatHoleResp = 'm'
TypeNatHoleClientDetectOK = 'd'
TypeNatHoleSid = '5'
)
@ -54,6 +55,7 @@ var (
TypeNatHoleVisitor: NatHoleVisitor{},
TypeNatHoleClient: NatHoleClient{},
TypeNatHoleResp: NatHoleResp{},
TypeNatHoleClientDetectOK: NatHoleClientDetectOK{},
TypeNatHoleSid: NatHoleSid{},
}
)
@ -169,6 +171,9 @@ type NatHoleResp struct {
Error string `json:"error"`
}
type NatHoleClientDetectOK struct {
}
type NatHoleSid struct {
Sid string `json:"sid"`
}

17
models/nathole/nathole.go
View File

@ -18,6 +18,11 @@ import (
// Timeout seconds.
var NatHoleTimeout int64 = 10
type SidRequest struct {
Sid string
NotifyCh chan struct{}
}
type NatHoleController struct {
listener *net.UDPConn
@ -44,11 +49,11 @@ func NewNatHoleController(udpBindAddr string) (nc *NatHoleController, err error)
return nc, nil
}
func (nc *NatHoleController) ListenClient(name string, sk string) (sidCh chan string) {
func (nc *NatHoleController) ListenClient(name string, sk string) (sidCh chan *SidRequest) {
clientCfg := &NatHoleClientCfg{
Name: name,
Sk: sk,
SidCh: make(chan string),
SidCh: make(chan *SidRequest),
}
nc.mu.Lock()
nc.clientCfgs[name] = clientCfg
@ -132,7 +137,10 @@ func (nc *NatHoleController) HandleVisitor(m *msg.NatHoleVisitor, raddr *net.UDP
}()
err := errors.PanicToError(func() {
clientCfg.SidCh <- sid
clientCfg.SidCh <- &SidRequest{
Sid: sid,
NotifyCh: session.NotifyCh,
}
})
if err != nil {
return
@ -158,7 +166,6 @@ func (nc *NatHoleController) HandleClient(m *msg.NatHoleClient, raddr *net.UDPAd
}
log.Trace("handle client message, sid [%s]", session.Sid)
session.ClientAddr = raddr
session.NotifyCh <- struct{}{}
resp := nc.GenNatHoleResponse(session, "")
log.Trace("send nat hole response to client")
@ -201,5 +208,5 @@ type NatHoleSession struct {
type NatHoleClientCfg struct {
Name string
Sk string
SidCh chan string
SidCh chan *SidRequest
}

26
server/proxy/xtcp.go
View File

@ -42,18 +42,40 @@ func (pxy *XtcpProxy) Run() (remoteAddr string, err error) {
select {
case <-pxy.closeCh:
break
case sid := <-sidCh:
case sidRequest := <-sidCh:
sr := sidRequest
workConn, errRet := pxy.GetWorkConnFromPool()
if errRet != nil {
continue
}
m := &msg.NatHoleSid{
Sid: sid,
Sid: sr.Sid,
}
errRet = msg.WriteMsg(workConn, m)
if errRet != nil {
pxy.Warn("write nat hole sid package error, %v", errRet)
workConn.Close()
break
}
go func() {
raw, errRet := msg.ReadMsg(workConn)
if errRet != nil {
pxy.Warn("read nat hole client ok package error: %v", errRet)
workConn.Close()
return
}
if _, ok := raw.(*msg.NatHoleClientDetectOK); !ok {
pxy.Warn("read nat hole client ok package format error")
workConn.Close()
return
}
select {
case sr.NotifyCh <- struct{}{}:
default:
}
}()
}
}
}()