mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-16 06:22:21 +08:00
298 lines
12 KiB
Go
298 lines
12 KiB
Go
package dialer
|
|
|
|
import (
|
|
"context"
|
|
"net"
|
|
"net/netip"
|
|
"time"
|
|
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"github.com/sagernet/sing-box/common/conntrack"
|
|
C "github.com/sagernet/sing-box/constant"
|
|
"github.com/sagernet/sing-box/option"
|
|
"github.com/sagernet/sing/common"
|
|
"github.com/sagernet/sing/common/atomic"
|
|
"github.com/sagernet/sing/common/control"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
)
|
|
|
|
var (
|
|
_ ParallelInterfaceDialer = (*DefaultDialer)(nil)
|
|
_ WireGuardListener = (*DefaultDialer)(nil)
|
|
)
|
|
|
|
type DefaultDialer struct {
|
|
dialer4 tcpDialer
|
|
dialer6 tcpDialer
|
|
udpDialer4 net.Dialer
|
|
udpDialer6 net.Dialer
|
|
udpListener net.ListenConfig
|
|
udpAddr4 string
|
|
udpAddr6 string
|
|
isWireGuardListener bool
|
|
networkManager adapter.NetworkManager
|
|
networkStrategy C.NetworkStrategy
|
|
networkType []C.InterfaceType
|
|
fallbackNetworkType []C.InterfaceType
|
|
networkFallbackDelay time.Duration
|
|
networkLastFallback atomic.TypedValue[time.Time]
|
|
}
|
|
|
|
func NewDefault(networkManager adapter.NetworkManager, options option.DialerOptions) (*DefaultDialer, error) {
|
|
var (
|
|
dialer net.Dialer
|
|
listener net.ListenConfig
|
|
interfaceFinder control.InterfaceFinder
|
|
networkStrategy C.NetworkStrategy
|
|
networkType []C.InterfaceType
|
|
fallbackNetworkType []C.InterfaceType
|
|
networkFallbackDelay time.Duration
|
|
)
|
|
if networkManager != nil {
|
|
interfaceFinder = networkManager.InterfaceFinder()
|
|
} else {
|
|
interfaceFinder = control.NewDefaultInterfaceFinder()
|
|
}
|
|
if options.BindInterface != "" {
|
|
bindFunc := control.BindToInterface(interfaceFinder, options.BindInterface, -1)
|
|
dialer.Control = control.Append(dialer.Control, bindFunc)
|
|
listener.Control = control.Append(listener.Control, bindFunc)
|
|
}
|
|
if options.RoutingMark > 0 {
|
|
dialer.Control = control.Append(dialer.Control, control.RoutingMark(uint32(options.RoutingMark)))
|
|
listener.Control = control.Append(listener.Control, control.RoutingMark(uint32(options.RoutingMark)))
|
|
}
|
|
if networkManager != nil {
|
|
autoRedirectOutputMark := networkManager.AutoRedirectOutputMark()
|
|
if autoRedirectOutputMark > 0 {
|
|
if options.RoutingMark > 0 {
|
|
return nil, E.New("`routing_mark` is conflict with `tun.auto_redirect` with `tun.route_[_exclude]_address_set")
|
|
}
|
|
dialer.Control = control.Append(dialer.Control, control.RoutingMark(autoRedirectOutputMark))
|
|
listener.Control = control.Append(listener.Control, control.RoutingMark(autoRedirectOutputMark))
|
|
}
|
|
}
|
|
if C.NetworkStrategy(options.NetworkStrategy) != C.NetworkStrategyDefault {
|
|
if options.BindInterface != "" || options.Inet4BindAddress != nil || options.Inet6BindAddress != nil {
|
|
return nil, E.New("`network_strategy` is conflict with `bind_interface`, `inet4_bind_address` and `inet6_bind_address`")
|
|
}
|
|
networkStrategy = C.NetworkStrategy(options.NetworkStrategy)
|
|
networkType = common.Map(options.NetworkType, option.InterfaceType.Build)
|
|
fallbackNetworkType = common.Map(options.FallbackNetworkType, option.InterfaceType.Build)
|
|
networkFallbackDelay = time.Duration(options.NetworkFallbackDelay)
|
|
if networkManager == nil || !networkManager.AutoDetectInterface() {
|
|
return nil, E.New("`route.auto_detect_interface` is require by `network_strategy`")
|
|
}
|
|
}
|
|
if networkManager != nil && options.BindInterface == "" && options.Inet4BindAddress == nil && options.Inet6BindAddress == nil {
|
|
defaultOptions := networkManager.DefaultOptions()
|
|
if defaultOptions.BindInterface != "" {
|
|
bindFunc := control.BindToInterface(networkManager.InterfaceFinder(), defaultOptions.BindInterface, -1)
|
|
dialer.Control = control.Append(dialer.Control, bindFunc)
|
|
listener.Control = control.Append(listener.Control, bindFunc)
|
|
} else if networkManager.AutoDetectInterface() {
|
|
if defaultOptions.NetworkStrategy != C.NetworkStrategyDefault && C.NetworkStrategy(options.NetworkStrategy) == C.NetworkStrategyDefault {
|
|
networkStrategy = defaultOptions.NetworkStrategy
|
|
networkType = defaultOptions.NetworkType
|
|
fallbackNetworkType = defaultOptions.FallbackNetworkType
|
|
networkFallbackDelay = defaultOptions.FallbackDelay
|
|
bindFunc := networkManager.ProtectFunc()
|
|
dialer.Control = control.Append(dialer.Control, bindFunc)
|
|
listener.Control = control.Append(listener.Control, bindFunc)
|
|
} else {
|
|
bindFunc := networkManager.AutoDetectInterfaceFunc()
|
|
dialer.Control = control.Append(dialer.Control, bindFunc)
|
|
listener.Control = control.Append(listener.Control, bindFunc)
|
|
}
|
|
}
|
|
}
|
|
if options.ReuseAddr {
|
|
listener.Control = control.Append(listener.Control, control.ReuseAddr())
|
|
}
|
|
if options.ProtectPath != "" {
|
|
dialer.Control = control.Append(dialer.Control, control.ProtectPath(options.ProtectPath))
|
|
listener.Control = control.Append(listener.Control, control.ProtectPath(options.ProtectPath))
|
|
}
|
|
if options.ConnectTimeout != 0 {
|
|
dialer.Timeout = time.Duration(options.ConnectTimeout)
|
|
} else {
|
|
dialer.Timeout = C.TCPConnectTimeout
|
|
}
|
|
// TODO: Add an option to customize the keep alive period
|
|
dialer.KeepAlive = C.TCPKeepAliveInitial
|
|
dialer.Control = control.Append(dialer.Control, control.SetKeepAlivePeriod(C.TCPKeepAliveInitial, C.TCPKeepAliveInterval))
|
|
var udpFragment bool
|
|
if options.UDPFragment != nil {
|
|
udpFragment = *options.UDPFragment
|
|
} else {
|
|
udpFragment = options.UDPFragmentDefault
|
|
}
|
|
if !udpFragment {
|
|
dialer.Control = control.Append(dialer.Control, control.DisableUDPFragment())
|
|
listener.Control = control.Append(listener.Control, control.DisableUDPFragment())
|
|
}
|
|
var (
|
|
dialer4 = dialer
|
|
udpDialer4 = dialer
|
|
udpAddr4 string
|
|
)
|
|
if options.Inet4BindAddress != nil {
|
|
bindAddr := options.Inet4BindAddress.Build(netip.IPv4Unspecified())
|
|
dialer4.LocalAddr = &net.TCPAddr{IP: bindAddr.AsSlice()}
|
|
udpDialer4.LocalAddr = &net.UDPAddr{IP: bindAddr.AsSlice()}
|
|
udpAddr4 = M.SocksaddrFrom(bindAddr, 0).String()
|
|
}
|
|
var (
|
|
dialer6 = dialer
|
|
udpDialer6 = dialer
|
|
udpAddr6 string
|
|
)
|
|
if options.Inet6BindAddress != nil {
|
|
bindAddr := options.Inet6BindAddress.Build(netip.IPv6Unspecified())
|
|
dialer6.LocalAddr = &net.TCPAddr{IP: bindAddr.AsSlice()}
|
|
udpDialer6.LocalAddr = &net.UDPAddr{IP: bindAddr.AsSlice()}
|
|
udpAddr6 = M.SocksaddrFrom(bindAddr, 0).String()
|
|
}
|
|
if options.TCPMultiPath {
|
|
if !go121Available {
|
|
return nil, E.New("MultiPath TCP requires go1.21, please recompile your binary.")
|
|
}
|
|
setMultiPathTCP(&dialer4)
|
|
}
|
|
if options.IsWireGuardListener {
|
|
for _, controlFn := range WgControlFns {
|
|
listener.Control = control.Append(listener.Control, controlFn)
|
|
}
|
|
}
|
|
if networkStrategy != C.NetworkStrategyDefault && options.TCPFastOpen {
|
|
return nil, E.New("`tcp_fast_open` is conflict with `network_strategy` or `route.default_network_strategy`")
|
|
}
|
|
tcpDialer4, err := newTCPDialer(dialer4, options.TCPFastOpen)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
tcpDialer6, err := newTCPDialer(dialer6, options.TCPFastOpen)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &DefaultDialer{
|
|
dialer4: tcpDialer4,
|
|
dialer6: tcpDialer6,
|
|
udpDialer4: udpDialer4,
|
|
udpDialer6: udpDialer6,
|
|
udpListener: listener,
|
|
udpAddr4: udpAddr4,
|
|
udpAddr6: udpAddr6,
|
|
isWireGuardListener: options.IsWireGuardListener,
|
|
networkManager: networkManager,
|
|
networkStrategy: networkStrategy,
|
|
networkType: networkType,
|
|
fallbackNetworkType: fallbackNetworkType,
|
|
networkFallbackDelay: networkFallbackDelay,
|
|
}, nil
|
|
}
|
|
|
|
func (d *DefaultDialer) DialContext(ctx context.Context, network string, address M.Socksaddr) (net.Conn, error) {
|
|
if !address.IsValid() {
|
|
return nil, E.New("invalid address")
|
|
}
|
|
if d.networkStrategy == C.NetworkStrategyDefault {
|
|
switch N.NetworkName(network) {
|
|
case N.NetworkUDP:
|
|
if !address.IsIPv6() {
|
|
return trackConn(d.udpDialer4.DialContext(ctx, network, address.String()))
|
|
} else {
|
|
return trackConn(d.udpDialer6.DialContext(ctx, network, address.String()))
|
|
}
|
|
}
|
|
if !address.IsIPv6() {
|
|
return trackConn(DialSlowContext(&d.dialer4, ctx, network, address))
|
|
} else {
|
|
return trackConn(DialSlowContext(&d.dialer6, ctx, network, address))
|
|
}
|
|
} else {
|
|
return d.DialParallelInterface(ctx, network, address, d.networkStrategy, d.networkType, d.fallbackNetworkType, d.networkFallbackDelay)
|
|
}
|
|
}
|
|
|
|
func (d *DefaultDialer) DialParallelInterface(ctx context.Context, network string, address M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.Conn, error) {
|
|
if strategy == C.NetworkStrategyDefault {
|
|
return d.DialContext(ctx, network, address)
|
|
}
|
|
if !d.networkManager.AutoDetectInterface() {
|
|
return nil, E.New("`route.auto_detect_interface` is require by `network_strategy`")
|
|
}
|
|
var dialer net.Dialer
|
|
if N.NetworkName(network) == N.NetworkTCP {
|
|
dialer = dialerFromTCPDialer(d.dialer4)
|
|
} else {
|
|
dialer = d.udpDialer4
|
|
}
|
|
fastFallback := time.Now().Sub(d.networkLastFallback.Load()) < C.TCPTimeout
|
|
var (
|
|
conn net.Conn
|
|
isPrimary bool
|
|
err error
|
|
)
|
|
if !fastFallback {
|
|
conn, isPrimary, err = d.dialParallelInterface(ctx, dialer, network, address.String(), strategy, interfaceType, fallbackInterfaceType, fallbackDelay)
|
|
} else {
|
|
conn, isPrimary, err = d.dialParallelInterfaceFastFallback(ctx, dialer, network, address.String(), strategy, interfaceType, fallbackInterfaceType, fallbackDelay, d.networkLastFallback.Store)
|
|
}
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if !fastFallback && !isPrimary {
|
|
d.networkLastFallback.Store(time.Now())
|
|
}
|
|
return trackConn(conn, nil)
|
|
}
|
|
|
|
func (d *DefaultDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
|
|
if d.networkStrategy == C.NetworkStrategyDefault {
|
|
if destination.IsIPv6() {
|
|
return trackPacketConn(d.udpListener.ListenPacket(ctx, N.NetworkUDP, d.udpAddr6))
|
|
} else if destination.IsIPv4() && !destination.Addr.IsUnspecified() {
|
|
return trackPacketConn(d.udpListener.ListenPacket(ctx, N.NetworkUDP+"4", d.udpAddr4))
|
|
} else {
|
|
return trackPacketConn(d.udpListener.ListenPacket(ctx, N.NetworkUDP, d.udpAddr4))
|
|
}
|
|
} else {
|
|
return d.ListenSerialInterfacePacket(ctx, destination, d.networkStrategy, d.networkType, d.fallbackNetworkType, d.networkFallbackDelay)
|
|
}
|
|
}
|
|
|
|
func (d *DefaultDialer) ListenSerialInterfacePacket(ctx context.Context, destination M.Socksaddr, strategy C.NetworkStrategy, interfaceType []C.InterfaceType, fallbackInterfaceType []C.InterfaceType, fallbackDelay time.Duration) (net.PacketConn, error) {
|
|
if strategy == C.NetworkStrategyDefault {
|
|
return d.ListenPacket(ctx, destination)
|
|
}
|
|
if !d.networkManager.AutoDetectInterface() {
|
|
return nil, E.New("`route.auto_detect_interface` is require by `network_strategy`")
|
|
}
|
|
network := N.NetworkUDP
|
|
if destination.IsIPv4() && !destination.Addr.IsUnspecified() {
|
|
network += "4"
|
|
}
|
|
return trackPacketConn(d.listenSerialInterfacePacket(ctx, d.udpListener, network, "", strategy, interfaceType, fallbackInterfaceType, fallbackDelay))
|
|
}
|
|
|
|
func (d *DefaultDialer) ListenPacketCompat(network, address string) (net.PacketConn, error) {
|
|
return trackPacketConn(d.listenSerialInterfacePacket(context.Background(), d.udpListener, network, address, d.networkStrategy, d.networkType, d.fallbackNetworkType, d.networkFallbackDelay))
|
|
}
|
|
|
|
func trackConn(conn net.Conn, err error) (net.Conn, error) {
|
|
if !conntrack.Enabled || err != nil {
|
|
return conn, err
|
|
}
|
|
return conntrack.NewConn(conn)
|
|
}
|
|
|
|
func trackPacketConn(conn net.PacketConn, err error) (net.PacketConn, error) {
|
|
if !conntrack.Enabled || err != nil {
|
|
return conn, err
|
|
}
|
|
return conntrack.NewPacketConn(conn)
|
|
}
|