chore: better keepalive handle

common/net/tcp_keepalive.go

@@ -0,0 +1,23 @@
+package net
+
+import (
+	"net"
+	"runtime"
+	"time"
+)
+
+var (
+	KeepAliveIdle     = 0 * time.Second
+	KeepAliveInterval = 0 * time.Second
+	DisableKeepAlive  = false
+)
+
+func TCPKeepAlive(c net.Conn) {
+	if tcp, ok := c.(*net.TCPConn); ok {
+		if runtime.GOOS == "android" || DisableKeepAlive {
+			_ = tcp.SetKeepAlive(false)
+		} else {
+			tcpKeepAlive(tcp)
+		}
+	}
+}

common/net/tcp_keepalive_go122.go

@@ -4,9 +4,7 @@ package net
 
 import "net"
 
-func TCPKeepAlive(c net.Conn) {
-	if tcp, ok := c.(*net.TCPConn); ok {
-		_ = tcp.SetKeepAlive(true)
-		_ = tcp.SetKeepAlivePeriod(KeepAliveInterval)
-	}
+func tcpKeepAlive(tcp *net.TCPConn) {
+	_ = tcp.SetKeepAlive(true)
+	_ = tcp.SetKeepAlivePeriod(KeepAliveInterval)
 }

common/net/tcp_keepalive_go123.go

@@ -4,12 +4,16 @@ package net
 
 import "net"
 
-func TCPKeepAlive(c net.Conn) {
-	if tcp, ok := c.(*net.TCPConn); ok {
-		_ = tcp.SetKeepAliveConfig(net.KeepAliveConfig{
-			Enable:   true,
-			Idle:     KeepAliveIdle,
-			Interval: KeepAliveInterval,
-		})
+func tcpKeepAlive(tcp *net.TCPConn) {
+	config := net.KeepAliveConfig{
+		Enable:   true,
+		Idle:     KeepAliveIdle,
+		Interval: KeepAliveInterval,
 	}
+	if !SupportTCPKeepAliveCount() {
+		// it's recommended to set both Idle and Interval to non-negative values in conjunction with a -1
+		// for Count on those old Windows if you intend to customize the TCP keep-alive settings.
+		config.Count = -1
+	}
+	_ = tcp.SetKeepAliveConfig(config)
 }

common/net/tcp_keepalive_go123_unix.go

@@ -0,0 +1,15 @@
+//go:build go1.23 && unix
+
+package net
+
+func SupportTCPKeepAliveIdle() bool {
+	return true
+}
+
+func SupportTCPKeepAliveInterval() bool {
+	return true
+}
+
+func SupportTCPKeepAliveCount() bool {
+	return true
+}

common/net/tcp_keepalive_go123_windows.go

@@ -0,0 +1,63 @@
+//go:build go1.23 && windows
+
+// copy and modify from golang1.23's internal/syscall/windows/version_windows.go
+
+package net
+
+import (
+	"errors"
+	"sync"
+	"syscall"
+
+	"github.com/metacubex/mihomo/constant/features"
+
+	"golang.org/x/sys/windows"
+)
+
+var (
+	supportTCPKeepAliveIdle     bool
+	supportTCPKeepAliveInterval bool
+	supportTCPKeepAliveCount    bool
+)
+
+var initTCPKeepAlive = sync.OnceFunc(func() {
+	s, err := windows.WSASocket(syscall.AF_INET, syscall.SOCK_STREAM, syscall.IPPROTO_TCP, nil, 0, windows.WSA_FLAG_NO_HANDLE_INHERIT)
+	if err != nil {
+		// Fallback to checking the Windows version.
+		major, build := features.WindowsMajorVersion, features.WindowsBuildNumber
+		supportTCPKeepAliveIdle = major >= 10 && build >= 16299
+		supportTCPKeepAliveInterval = major >= 10 && build >= 16299
+		supportTCPKeepAliveCount = major >= 10 && build >= 15063
+		return
+	}
+	defer windows.Closesocket(s)
+	var optSupported = func(opt int) bool {
+		err := windows.SetsockoptInt(s, syscall.IPPROTO_TCP, opt, 1)
+		return !errors.Is(err, syscall.WSAENOPROTOOPT)
+	}
+	supportTCPKeepAliveIdle = optSupported(windows.TCP_KEEPIDLE)
+	supportTCPKeepAliveInterval = optSupported(windows.TCP_KEEPINTVL)
+	supportTCPKeepAliveCount = optSupported(windows.TCP_KEEPCNT)
+})
+
+// SupportTCPKeepAliveIdle indicates whether TCP_KEEPIDLE is supported.
+// The minimal requirement is Windows 10.0.16299.
+func SupportTCPKeepAliveIdle() bool {
+	initTCPKeepAlive()
+	return supportTCPKeepAliveIdle
+}
+
+// SupportTCPKeepAliveInterval indicates whether TCP_KEEPINTVL is supported.
+// The minimal requirement is Windows 10.0.16299.
+func SupportTCPKeepAliveInterval() bool {
+	initTCPKeepAlive()
+	return supportTCPKeepAliveInterval
+}
+
+// SupportTCPKeepAliveCount indicates whether TCP_KEEPCNT is supported.
+// supports TCP_KEEPCNT.
+// The minimal requirement is Windows 10.0.15063.
+func SupportTCPKeepAliveCount() bool {
+	initTCPKeepAlive()
+	return supportTCPKeepAliveCount
+}

common/net/tcpip.go

@@ -4,12 +4,6 @@ import (
 	"fmt"
 	"net"
 	"strings"
-	"time"
-)
-
-var (
-	KeepAliveIdle     = 0 * time.Second
-	KeepAliveInterval = 0 * time.Second
 )
 
 func SplitNetworkType(s string) (string, string, error) {

component/dialer/dialer.go

@@ -13,7 +13,6 @@ import (
 	"time"
 
 	"github.com/metacubex/mihomo/component/resolver"
-	"github.com/metacubex/mihomo/constant/features"
 	"github.com/metacubex/mihomo/log"
 )
 
@@ -79,29 +78,29 @@ func DialContext(ctx context.Context, network, address string, options ...Option
 }
 
 func ListenPacket(ctx context.Context, network, address string, rAddrPort netip.AddrPort, options ...Option) (net.PacketConn, error) {
-	if features.CMFA && DefaultSocketHook != nil {
-		return listenPacketHooked(ctx, network, address)
-	}
-
 	cfg := applyOptions(options...)
 
 	lc := &net.ListenConfig{}
-	if cfg.interfaceName != "" {
-		bind := bindIfaceToListenConfig
-		if cfg.fallbackBind {
-			bind = fallbackBindIfaceToListenConfig
-		}
-		addr, err := bind(cfg.interfaceName, lc, network, address, rAddrPort)
-		if err != nil {
-			return nil, err
-		}
-		address = addr
-	}
 	if cfg.addrReuse {
 		addrReuseToListenConfig(lc)
 	}
-	if cfg.routingMark != 0 {
-		bindMarkToListenConfig(cfg.routingMark, lc, network, address)
+	if DefaultSocketHook != nil { // ignore interfaceName, routingMark when DefaultSocketHook not null (in CFMA)
+		socketHookToListenConfig(lc)
+	} else {
+		if cfg.interfaceName != "" {
+			bind := bindIfaceToListenConfig
+			if cfg.fallbackBind {
+				bind = fallbackBindIfaceToListenConfig
+			}
+			addr, err := bind(cfg.interfaceName, lc, network, address, rAddrPort)
+			if err != nil {
+				return nil, err
+			}
+			address = addr
+		}
+		if cfg.routingMark != 0 {
+			bindMarkToListenConfig(cfg.routingMark, lc, network, address)
+		}
 	}
 
 	return lc.ListenPacket(ctx, network, address)
@@ -149,25 +148,26 @@ func dialContext(ctx context.Context, network string, destination netip.Addr, po
 		setMultiPathTCP(dialer)
 	}
 
-	if features.CMFA && DefaultSocketHook != nil { // ignore interfaceName, routingMark and tfo in CMFA
-		return dialContextHooked(ctx, dialer, network, address)
+	if DefaultSocketHook != nil { // ignore interfaceName, routingMark and tfo when DefaultSocketHook not null (in CFMA)
+		socketHookToToDialer(dialer)
+	} else {
+		if opt.interfaceName != "" {
+			bind := bindIfaceToDialer
+			if opt.fallbackBind {
+				bind = fallbackBindIfaceToDialer
+			}
+			if err := bind(opt.interfaceName, dialer, network, destination); err != nil {
+				return nil, err
+			}
+		}
+		if opt.routingMark != 0 {
+			bindMarkToDialer(opt.routingMark, dialer, network, destination)
+		}
+		if opt.tfo && !DisableTFO {
+			return dialTFO(ctx, *dialer, network, address)
+		}
 	}
 
-	if opt.interfaceName != "" {
-		bind := bindIfaceToDialer
-		if opt.fallbackBind {
-			bind = fallbackBindIfaceToDialer
-		}
-		if err := bind(opt.interfaceName, dialer, network, destination); err != nil {
-			return nil, err
-		}
-	}
-	if opt.routingMark != 0 {
-		bindMarkToDialer(opt.routingMark, dialer, network, destination)
-	}
-	if opt.tfo && !DisableTFO {
-		return dialTFO(ctx, *dialer, network, address)
-	}
 	return dialer.DialContext(ctx, network, address)
 }
 

component/dialer/patch_android.go

@@ -1,38 +0,0 @@
-//go:build android && cmfa
-
-package dialer
-
-import (
-	"context"
-	"net"
-	"syscall"
-)
-
-type SocketControl func(network, address string, conn syscall.RawConn) error
-
-var DefaultSocketHook SocketControl
-
-func dialContextHooked(ctx context.Context, dialer *net.Dialer, network string, address string) (net.Conn, error) {
-	addControlToDialer(dialer, func(ctx context.Context, network, address string, c syscall.RawConn) error {
-		return DefaultSocketHook(network, address, c)
-	})
-
-	conn, err := dialer.DialContext(ctx, network, address)
-	if err != nil {
-		return nil, err
-	}
-
-	if t, ok := conn.(*net.TCPConn); ok {
-		t.SetKeepAlive(false)
-	}
-
-	return conn, nil
-}
-
-func listenPacketHooked(ctx context.Context, network, address string) (net.PacketConn, error) {
-	lc := &net.ListenConfig{
-		Control: DefaultSocketHook,
-	}
-
-	return lc.ListenPacket(ctx, network, address)
-}

component/dialer/patch_common.go

@@ -1,21 +0,0 @@
-//go:build !(android && cmfa)
-
-package dialer
-
-import (
-	"context"
-	"net"
-	"syscall"
-)
-
-type SocketControl func(network, address string, conn syscall.RawConn) error
-
-var DefaultSocketHook SocketControl
-
-func dialContextHooked(ctx context.Context, dialer *net.Dialer, network string, address string) (net.Conn, error) {
-	return nil, nil
-}
-
-func listenPacketHooked(ctx context.Context, network, address string) (net.PacketConn, error) {
-	return nil, nil
-}

component/dialer/socket_hook.go

@@ -0,0 +1,27 @@
+package dialer
+
+import (
+	"context"
+	"net"
+	"syscall"
+)
+
+// SocketControl
+// never change type traits because it's used in CFMA
+type SocketControl func(network, address string, conn syscall.RawConn) error
+
+// DefaultSocketHook
+// never change type traits because it's used in CFMA
+var DefaultSocketHook SocketControl
+
+func socketHookToToDialer(dialer *net.Dialer) {
+	addControlToDialer(dialer, func(ctx context.Context, network, address string, c syscall.RawConn) error {
+		return DefaultSocketHook(network, address, c)
+	})
+}
+
+func socketHookToListenConfig(lc *net.ListenConfig) {
+	addControlToListenConfig(lc, func(ctx context.Context, network, address string, c syscall.RawConn) error {
+		return DefaultSocketHook(network, address, c)
+	})
+}

config/config.go

@@ -340,6 +340,7 @@ type RawConfig struct {
 	GlobalUA                string            `yaml:"global-ua"`
 	KeepAliveIdle           int               `yaml:"keep-alive-idle"`
 	KeepAliveInterval       int               `yaml:"keep-alive-interval"`
+	DisableKeepAlive        bool              `yaml:"disable-keep-alive"`
 
 	Sniffer       RawSniffer                `yaml:"sniffer" json:"sniffer"`
 	ProxyProvider map[string]map[string]any `yaml:"proxy-providers"`
@@ -657,6 +658,7 @@ func parseGeneral(cfg *RawConfig) (*General, error) {
 	if cfg.KeepAliveInterval != 0 {
 		N.KeepAliveInterval = time.Duration(cfg.KeepAliveInterval) * time.Second
 	}
+	N.DisableKeepAlive = cfg.DisableKeepAlive
 
 	updater.ExternalUIPath = cfg.ExternalUI
 	// checkout externalUI exist

docs/config.yaml

@@ -82,8 +82,9 @@ external-doh-server: /dns-query
 global-client-fingerprint: chrome
 
 #  TCP keep alive interval
-# keep-alive-idle: 7200
-# keep-alive-interval: 75
+# disable-keep-alive: false #目前在android端强制为true
+# keep-alive-idle: 15
+# keep-alive-interval: 15
 
 # routing-mark:6666 # 配置 fwmark 仅用于 Linux
 experimental:

listener/http/server.go

@@ -4,9 +4,9 @@ import (
 	"net"
 
 	"github.com/metacubex/mihomo/adapter/inbound"
+	N "github.com/metacubex/mihomo/common/net"
 	"github.com/metacubex/mihomo/component/auth"
 	C "github.com/metacubex/mihomo/constant"
-	"github.com/metacubex/mihomo/constant/features"
 	authStore "github.com/metacubex/mihomo/listener/auth"
 )
 
@@ -74,11 +74,7 @@ func NewWithAuthenticator(addr string, tunnel C.Tunnel, authenticator auth.Authe
 				}
 				continue
 			}
-			if features.CMFA {
-				if t, ok := conn.(*net.TCPConn); ok {
-					t.SetKeepAlive(false)
-				}
-			}
+			N.TCPKeepAlive(conn)
 			if isDefault { // only apply on default listener
 				if !inbound.IsRemoteAddrDisAllowed(conn.RemoteAddr()) {
 					_ = conn.Close()