add release notes

README.md

@@ -343,20 +343,15 @@ Configure `frps` same as above.
 
 Note that it may not work with all types of NAT devices. You might want to fallback to stcp if xtcp doesn't work.
 
-1. In `frps.ini` configure a UDP port for xtcp:
+1. Start `frpc` on machine B, and expose the SSH port. Note that the `remote_port` field is removed:
-
-  ```ini
-  # frps.ini
-  bind_udp_port = 7001
-  ```
-
-2. Start `frpc` on machine B, and expose the SSH port. Note that the `remote_port` field is removed:
 
   ```ini
   # frpc.ini
   [common]
   server_addr = x.x.x.x
   server_port = 7000
+  # set up a new stun server if the default one is not available.
+  # nat_hole_stun_server = xxx
 
   [p2p_ssh]
   type = xtcp
@@ -365,13 +360,15 @@ Note that it may not work with all types of NAT devices. You might want to fallb
   local_port = 22
   ```
 
-3. Start another `frpc` (typically on another machine C) with the configuration to connect to SSH using P2P mode:
+2. Start another `frpc` (typically on another machine C) with the configuration to connect to SSH using P2P mode:
 
   ```ini
   # frpc.ini
   [common]
   server_addr = x.x.x.x
   server_port = 7000
+  # set up a new stun server if the default one is not available.
+  # nat_hole_stun_server = xxx
 
   [p2p_ssh_visitor]
   type = xtcp
@@ -380,9 +377,11 @@ Note that it may not work with all types of NAT devices. You might want to fallb
   sk = abcdefg
   bind_addr = 127.0.0.1
   bind_port = 6000
+  # when automatic tunnel persistence is required, set it to true
+  keep_tunnel_open = false
   ```
 
-4. On machine C, connect to SSH on machine B, using this command:
+3. On machine C, connect to SSH on machine B, using this command:
 
   `ssh -oPort=6000 127.0.0.1`
 

Release.md

@@ -1,8 +1,19 @@
+## Notes
+
+We have thoroughly refactored xtcp in this version to improve its penetration rate and stability.
+
+In this version, different penetration strategies can be attempted by retrying connections multiple times. Once a hole is successfully punched, the strategy will be recorded in the server cache for future reuse. When new users connect, the successfully penetrated tunnel can be reused instead of punching a new hole.
+
+**Due to a significant refactor of xtcp, this version is not compatible with previous versions of xtcp.**
+
+**To use features related to xtcp, both frpc and frps need to be updated to the latest version.**
+
 ### New
 
-* The `httpconnect` type in `tcpmux` now supports authentication through the parameters `http_user` and `http_pwd`.
+* The frpc has added the `nathole discover` command for testing the NAT type of the current network.
+* `XTCP` has been refactored, resulting in a significant improvement in the success rate of penetration.
+* When verifying passwords, use `subtle.ConstantTimeCompare` and introduce a certain delay when the password is incorrect.
 
-### Improved
+### Fix
 
-* The web framework has been upgraded to vue3 + element-plus, and the dashboard has added some information display and supports dark mode.
+* Fix the problem of lagging when opening multiple table entries in the frps dashboard.
-* The e2e testing has been switched to ginkgo v2.

cmd/frps/root.go

@@ -39,7 +39,6 @@ var (
 
 	bindAddr             string
 	bindPort             int
-	bindUDPPort          int
 	kcpBindPort          int
 	proxyBindAddr        string
 	vhostHTTPPort        int
@@ -70,7 +69,6 @@ func init() {
 
 	rootCmd.PersistentFlags().StringVarP(&bindAddr, "bind_addr", "", "0.0.0.0", "bind address")
 	rootCmd.PersistentFlags().IntVarP(&bindPort, "bind_port", "p", 7000, "bind port")
-	rootCmd.PersistentFlags().IntVarP(&bindUDPPort, "bind_udp_port", "", 0, "bind udp port")
 	rootCmd.PersistentFlags().IntVarP(&kcpBindPort, "kcp_bind_port", "", 0, "kcp bind udp port")
 	rootCmd.PersistentFlags().StringVarP(&proxyBindAddr, "proxy_bind_addr", "", "0.0.0.0", "proxy bind address")
 	rootCmd.PersistentFlags().IntVarP(&vhostHTTPPort, "vhost_http_port", "", 0, "vhost http port")
@@ -159,7 +157,6 @@ func parseServerCommonCfgFromCmd() (cfg config.ServerCommonConf, err error) {
 
 	cfg.BindAddr = bindAddr
 	cfg.BindPort = bindPort
-	cfg.BindUDPPort = bindUDPPort
 	cfg.KCPBindPort = kcpBindPort
 	cfg.ProxyBindAddr = proxyBindAddr
 	cfg.VhostHTTPPort = vhostHTTPPort

conf/frpc_full.ini

@@ -6,14 +6,6 @@
 server_addr = 0.0.0.0
 server_port = 7000
 
-# Specify another address of the server to connect for nat hole. By default, it's same with
-# server_addr.
-# nat_hole_server_addr = 0.0.0.0
-
-# ServerUDPPort specifies the server port to help penetrate NAT hole. By default, this value is 0.
-# This parameter is only used when executing "nathole discover" in the command line.
-# server_udp_port = 0
-
 # STUN server to help penetrate NAT hole.
 # nat_hole_stun_server = stun.easyvoip.com:3478
 
@@ -366,6 +358,11 @@ bind_addr = 127.0.0.1
 bind_port = 9001
 use_encryption = false
 use_compression = false
+# when automatic tunnel persistence is required, set it to true
+keep_tunnel_open = false
+# effective when keep_tunnel_open is set to true, the number of attempts to punch through per hour
+max_retries_an_hour = 8
+min_retry_interval = 90
 
 [tcpmuxhttpconnect]
 type = tcpmux

conf/frps_full.ini

@@ -6,9 +6,6 @@
 bind_addr = 0.0.0.0
 bind_port = 7000
 
-# udp port to help make udp hole to penetrate nat
-bind_udp_port = 7001
-
 # udp port used for kcp protocol, it can be same with 'bind_port'.
 # if not set, kcp is disabled in frps.
 kcp_bind_port = 7000
@@ -157,6 +154,9 @@ udp_packet_size = 1500
 # Dashboard port must be set first
 pprof_enable = false
 
+# Retention time for NAT hole punching strategy data.
+nat_hole_analysis_data_reserve_hours = 168
+
 [plugin.user-manager]
 addr = 127.0.0.1:9000
 path = /handler

pkg/config/client.go

@@ -35,15 +35,9 @@ type ClientCommonConf struct {
 	// ServerAddr specifies the address of the server to connect to. By
 	// default, this value is "0.0.0.0".
 	ServerAddr string `ini:"server_addr" json:"server_addr"`
-	// Specify another address of the server to connect for nat hole. By default, it's same with
-	// ServerAddr.
-	NatHoleServerAddr string `ini:"nat_hole_server_addr" json:"nat_hole_server_addr"`
 	// ServerPort specifies the port to connect to the server on. By default,
 	// this value is 7000.
 	ServerPort int `ini:"server_port" json:"server_port"`
-	// ServerUDPPort specifies the server port to help penetrate NAT hole. By default, this value is 0.
-	// This parameter is only used when executing "nathole discover" in the command line.
-	ServerUDPPort int `ini:"server_udp_port" json:"server_udp_port"`
 	// STUN server to help penetrate NAT hole.
 	NatHoleSTUNServer string `ini:"nat_hole_stun_server" json:"nat_hole_stun_server"`
 	// The maximum amount of time a dial to server will wait for a connect to complete.

pkg/config/server.go

@@ -38,10 +38,6 @@ type ServerCommonConf struct {
 	// BindPort specifies the port that the server listens on. By default, this
 	// value is 7000.
 	BindPort int `ini:"bind_port" json:"bind_port" validate:"gte=0,lte=65535"`
-	// BindUDPPort specifies the UDP port that the server listens on. If this
-	// value is 0, the server will not listen for UDP connections. By default,
-	// this value is 0
-	BindUDPPort int `ini:"bind_udp_port" json:"bind_udp_port" validate:"gte=0,lte=65535"`
 	// KCPBindPort specifies the KCP port that the server listens on. If this
 	// value is 0, the server will not listen for KCP connections. By default,
 	// this value is 0.

pkg/config/server_test.go

@@ -104,7 +104,6 @@ func Test_LoadServerCommonConf(t *testing.T) {
 				},
 				BindAddr:               "0.0.0.9",
 				BindPort:               7009,
-				BindUDPPort:            7008,
 				KCPBindPort:            7007,
 				QUICKeepalivePeriod:    10,
 				QUICMaxIdleTimeout:     30,
@@ -183,7 +182,6 @@ func Test_LoadServerCommonConf(t *testing.T) {
 				},
 				BindAddr:                        "0.0.0.9",
 				BindPort:                        7009,
-				BindUDPPort:                     7008,
 				QUICKeepalivePeriod:             10,
 				QUICMaxIdleTimeout:              30,
 				QUICMaxIncomingStreams:          100000,

pkg/msg/msg.go

@@ -80,10 +80,9 @@ type Login struct {
 }
 
 type LoginResp struct {
-	Version       string `json:"version,omitempty"`
+	Version string `json:"version,omitempty"`
-	RunID         string `json:"run_id,omitempty"`
+	RunID   string `json:"run_id,omitempty"`
-	ServerUDPPort int    `json:"server_udp_port,omitempty"`
+	Error   string `json:"error,omitempty"`
-	Error         string `json:"error,omitempty"`
 }
 
 // When frpc login success, send this message to frps for running a new proxy.

pkg/util/version/version.go

@@ -19,7 +19,7 @@ import (
 	"strings"
 )
 
-var version = "0.48.0"
+var version = "0.49.0"
 
 func Full() string {
 	return version

server/control.go

@@ -203,10 +203,9 @@ func NewControl(
 // Start send a login success message to client and start working.
 func (ctl *Control) Start() {
 	loginRespMsg := &msg.LoginResp{
-		Version:       version.Full(),
+		Version: version.Full(),
-		RunID:         ctl.runID,
+		RunID:   ctl.runID,
-		ServerUDPPort: ctl.serverCfg.BindUDPPort,
+		Error:   "",
-		Error:         "",
 	}
 	_ = msg.WriteMsg(ctl.conn, loginRespMsg)
 

server/dashboard_api.go

@@ -35,7 +35,6 @@ type GeneralResponse struct {
 type serverInfoResp struct {
 	Version               string `json:"version"`
 	BindPort              int    `json:"bind_port"`
-	BindUDPPort           int    `json:"bind_udp_port"`
 	VhostHTTPPort         int    `json:"vhost_http_port"`
 	VhostHTTPSPort        int    `json:"vhost_https_port"`
 	TCPMuxHTTPConnectPort int    `json:"tcpmux_httpconnect_port"`
@@ -76,7 +75,6 @@ func (svr *Service) APIServerInfo(w http.ResponseWriter, r *http.Request) {
 	svrResp := serverInfoResp{
 		Version:               version.Full(),
 		BindPort:              svr.cfg.BindPort,
-		BindUDPPort:           svr.cfg.BindUDPPort,
 		VhostHTTPPort:         svr.cfg.VhostHTTPPort,
 		VhostHTTPSPort:        svr.cfg.VhostHTTPSPort,
 		TCPMuxHTTPConnectPort: svr.cfg.TCPMuxHTTPConnectPort,