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Chore: adjust gVisor stack

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This commit is contained in:
yaling888 2022-03-28 03:25:55 +08:00
parent fe76cbf31c
commit 8df8f8cb08
16 changed files with 106 additions and 104 deletions
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4
hub/executor/executor.go
View file

@ -330,7 +330,9 @@ func updateIPTables(cfg *config.Config) {
log.Infoln("[IPTABLES] Setting iptables completed")
}
func Cleanup() {
func Shutdown() {
P.Cleanup()
tproxy.CleanupTProxyIPTables()
log.Warnln("Clash shutting down")
}

4
hub/hub.go
View file

@ -48,7 +48,3 @@ func Parse(options ...Option) error {
executor.ApplyConfig(cfg, true)
return nil
}
func Cleanup() {
executor.Cleanup()
}

3
listener/tun/device/device.go
View file

@ -29,4 +29,7 @@ type Device interface {
// UseIOBased work for other ip stack
UseIOBased() error
// Wait waits for the device to close.
Wait()
}

2
listener/tun/device/iobased/endpoint.go
View file

@ -103,7 +103,7 @@ func (e *Endpoint) dispatchLoop(cancel context.CancelFunc) {
case header.IPv6Version:
e.InjectInbound(header.IPv6ProtocolNumber, pkt)
}
pkt.DecRef() /* release */
pkt.DecRef()
}
}

3
listener/tun/device/tun/tun_wireguard.go
View file

@ -106,6 +106,9 @@ func (t *TUN) Write(packet []byte) (int, error) {
}
func (t *TUN) Close() error {
if t.Endpoint != nil {
t.Endpoint.Close()
}
return t.nt.Close()
}

10
listener/tun/ipstack/gvisor/adapter/handler.go
View file

@ -3,6 +3,12 @@ package adapter
// Handler is a TCP/UDP connection handler that implements
// HandleTCPConn and HandleUDPConn methods.
type Handler interface {
HandleTCPConn(TCPConn)
HandleUDPConn(UDPConn)
HandleTCP(TCPConn)
HandleUDP(UDPConn)
}
// TCPHandleFunc handles incoming TCP connection.
type TCPHandleFunc func(TCPConn)
// UDPHandleFunc handles incoming UDP connection.
type UDPHandleFunc func(UDPConn)

4
listener/tun/ipstack/gvisor/handler.go
View file

@ -24,7 +24,7 @@ type GVHandler struct {
UDPIn chan<- *inbound.PacketAdapter
}
func (gh *GVHandler) HandleTCPConn(tunConn adapter.TCPConn) {
func (gh *GVHandler) HandleTCP(tunConn adapter.TCPConn) {
id := tunConn.ID()
rAddr := &net.UDPAddr{
@ -77,7 +77,7 @@ func (gh *GVHandler) HandleTCPConn(tunConn adapter.TCPConn) {
gh.TCPIn <- inbound.NewSocket(socks5.ParseAddrToSocksAddr(rAddr), tunConn, C.TUN)
}
func (gh *GVHandler) HandleUDPConn(tunConn adapter.UDPConn) {
func (gh *GVHandler) HandleUDP(tunConn adapter.UDPConn) {
id := tunConn.ID()
rAddr := &net.UDPAddr{

27
listener/tun/ipstack/gvisor/nic.go
View file

@ -3,14 +3,13 @@ package gvisor
import (
"fmt"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/option"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
const (
// defaultNICID is the ID of default NIC used by DefaultStack.
defaultNICID tcpip.NICID = 0x01
// nicPromiscuousModeEnabled is the value used by stack to enable
// or disable NIC's promiscuous mode.
nicPromiscuousModeEnabled = true
@ -21,9 +20,9 @@ const (
)
// withCreatingNIC creates NIC for stack.
func withCreatingNIC(ep stack.LinkEndpoint) Option {
return func(s *gvStack) error {
if err := s.CreateNICWithOptions(s.nicID, ep,
func withCreatingNIC(nicID tcpip.NICID, ep stack.LinkEndpoint) option.Option {
return func(s *stack.Stack) error {
if err := s.CreateNICWithOptions(nicID, ep,
stack.NICOptions{
Disabled: false,
// If no queueing discipline was specified
@ -37,21 +36,21 @@ func withCreatingNIC(ep stack.LinkEndpoint) Option {
}
}
// withPromiscuousMode sets promiscuous mode in the given NIC.
func withPromiscuousMode(v bool) Option {
return func(s *gvStack) error {
if err := s.SetPromiscuousMode(s.nicID, v); err != nil {
// withPromiscuousMode sets promiscuous mode in the given NICs.
func withPromiscuousMode(nicID tcpip.NICID, v bool) option.Option {
return func(s *stack.Stack) error {
if err := s.SetPromiscuousMode(nicID, v); err != nil {
return fmt.Errorf("set promiscuous mode: %s", err)
}
return nil
}
}
// withSpoofing sets address spoofing in the given NIC, allowing
// withSpoofing sets address spoofing in the given NICs, allowing
// endpoints to bind to any address in the NIC.
func withSpoofing(v bool) Option {
return func(s *gvStack) error {
if err := s.SetSpoofing(s.nicID, v); err != nil {
func withSpoofing(nicID tcpip.NICID, v bool) option.Option {
return func(s *stack.Stack) error {
if err := s.SetSpoofing(nicID, v); err != nil {
return fmt.Errorf("set spoofing: %s", err)
}
return nil

27
listener/tun/ipstack/gvisor/opts.go → listener/tun/ipstack/gvisor/option/option.go
View file

@ -1,4 +1,4 @@
package gvisor
package option
import (
"fmt"
@ -7,6 +7,7 @@ import (
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
)
@ -56,11 +57,11 @@ const (
tcpDefaultBufferSize = 212 << 10 // 212 KiB
)
type Option func(*gvStack) error
type Option func(*stack.Stack) error
// WithDefault sets all default values for stack.
func WithDefault() Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
opts := []Option{
WithDefaultTTL(defaultTimeToLive),
WithForwarding(ipForwardingEnabled),
@ -110,7 +111,7 @@ func WithDefault() Option {
// WithDefaultTTL sets the default TTL used by stack.
func WithDefaultTTL(ttl uint8) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
opt := tcpip.DefaultTTLOption(ttl)
if err := s.SetNetworkProtocolOption(ipv4.ProtocolNumber, &opt); err != nil {
return fmt.Errorf("set ipv4 default TTL: %s", err)
@ -124,7 +125,7 @@ func WithDefaultTTL(ttl uint8) Option {
// WithForwarding sets packet forwarding between NICs for IPv4 & IPv6.
func WithForwarding(v bool) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
if err := s.SetForwardingDefaultAndAllNICs(ipv4.ProtocolNumber, v); err != nil {
return fmt.Errorf("set ipv4 forwarding: %s", err)
}
@ -138,7 +139,7 @@ func WithForwarding(v bool) Option {
// WithICMPBurst sets the number of ICMP messages that can be sent
// in a single burst.
func WithICMPBurst(burst int) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
s.SetICMPBurst(burst)
return nil
}
@ -147,7 +148,7 @@ func WithICMPBurst(burst int) Option {
// WithICMPLimit sets the maximum number of ICMP messages permitted
// by rate limiter.
func WithICMPLimit(limit rate.Limit) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
s.SetICMPLimit(limit)
return nil
}
@ -155,7 +156,7 @@ func WithICMPLimit(limit rate.Limit) Option {
// WithTCPBufferSizeRange sets the receive and send buffer size range for TCP.
func WithTCPBufferSizeRange(a, b, c int) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
rcvOpt := tcpip.TCPReceiveBufferSizeRangeOption{Min: a, Default: b, Max: c}
if err := s.SetTransportProtocolOption(tcp.ProtocolNumber, &rcvOpt); err != nil {
return fmt.Errorf("set TCP receive buffer size range: %s", err)
@ -170,7 +171,7 @@ func WithTCPBufferSizeRange(a, b, c int) Option {
// WithTCPCongestionControl sets the current congestion control algorithm.
func WithTCPCongestionControl(cc string) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
opt := tcpip.CongestionControlOption(cc)
if err := s.SetTransportProtocolOption(tcp.ProtocolNumber, &opt); err != nil {
return fmt.Errorf("set TCP congestion control algorithm: %s", err)
@ -181,7 +182,7 @@ func WithTCPCongestionControl(cc string) Option {
// WithTCPDelay enables or disables Nagle's algorithm in TCP.
func WithTCPDelay(v bool) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
opt := tcpip.TCPDelayEnabled(v)
if err := s.SetTransportProtocolOption(tcp.ProtocolNumber, &opt); err != nil {
return fmt.Errorf("set TCP delay: %s", err)
@ -192,7 +193,7 @@ func WithTCPDelay(v bool) Option {
// WithTCPModerateReceiveBuffer sets receive buffer moderation for TCP.
func WithTCPModerateReceiveBuffer(v bool) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
opt := tcpip.TCPModerateReceiveBufferOption(v)
if err := s.SetTransportProtocolOption(tcp.ProtocolNumber, &opt); err != nil {
return fmt.Errorf("set TCP moderate receive buffer: %s", err)
@ -203,7 +204,7 @@ func WithTCPModerateReceiveBuffer(v bool) Option {
// WithTCPSACKEnabled sets the SACK option for TCP.
func WithTCPSACKEnabled(v bool) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
opt := tcpip.TCPSACKEnabled(v)
if err := s.SetTransportProtocolOption(tcp.ProtocolNumber, &opt); err != nil {
return fmt.Errorf("set TCP SACK: %s", err)
@ -214,7 +215,7 @@ func WithTCPSACKEnabled(v bool) Option {
// WithTCPRecovery sets the recovery option for TCP.
func WithTCPRecovery(v tcpip.TCPRecovery) Option {
return func(s *gvStack) error {
return func(s *stack.Stack) error {
if err := s.SetTransportProtocolOption(tcp.ProtocolNumber, &v); err != nil {
return fmt.Errorf("set TCP Recovery: %s", err)
}

13
listener/tun/ipstack/gvisor/icmp.go → listener/tun/ipstack/gvisor/route.go
View file

@ -1,22 +1,23 @@
package gvisor
import (
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/option"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/stack"
)
func withICMPHandler() Option {
return func(s *gvStack) error {
// Add default route table for IPv4 and IPv6.
// This will handle all incoming ICMP packets.
func withRouteTable(nicID tcpip.NICID) option.Option {
return func(s *stack.Stack) error {
s.SetRouteTable([]tcpip.Route{
{
Destination: header.IPv4EmptySubnet,
NIC: s.nicID,
NIC: nicID,
},
{
Destination: header.IPv6EmptySubnet,
NIC: s.nicID,
NIC: nicID,
},
})
return nil

66
listener/tun/ipstack/gvisor/stack.go
View file

@ -5,6 +5,7 @@ import (
"github.com/Dreamacro/clash/listener/tun/device"
"github.com/Dreamacro/clash/listener/tun/ipstack"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/adapter"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/option"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
@ -18,23 +19,23 @@ import (
type gvStack struct {
*stack.Stack
device device.Device
handler adapter.Handler
nicID tcpip.NICID
}
func (s *gvStack) Close() error {
var err error
if s.device != nil {
err = s.device.Close()
s.device.Wait()
}
if s.Stack != nil {
s.Stack.Close()
s.Stack.Wait()
}
if s.device != nil {
_ = s.device.Close()
}
return nil
return err
}
// New allocates a new *gvStack with given options.
func New(device device.Device, handler adapter.Handler, opts ...Option) (ipstack.Stack, error) {
func New(device device.Device, handler adapter.Handler, opts ...option.Option) (ipstack.Stack, error) {
s := &gvStack{
Stack: stack.New(stack.Options{
NetworkProtocols: []stack.NetworkProtocolFactory{
@ -49,19 +50,15 @@ func New(device device.Device, handler adapter.Handler, opts ...Option) (ipstack
},
}),
device: device,
handler: handler,
nicID: defaultNICID,
device: device,
}
opts = append(opts,
// Important: We must initiate transport protocol handlers
// before creating NIC, otherwise NIC would dispatch packets
// to stack and cause race condition.
withICMPHandler(), withTCPHandler(), withUDPHandler(),
// Generate unique NIC id.
nicID := tcpip.NICID(s.Stack.UniqueID())
// Create stack NIC and then bind link endpoint.
withCreatingNIC(device.(stack.LinkEndpoint)),
opts = append(opts,
// Create stack NIC and then bind link endpoint to it.
withCreatingNIC(nicID, device),
// In the past we did s.AddAddressRange to assign 0.0.0.0/0
// onto the interface. We need that to be able to terminate
@ -70,27 +67,34 @@ func New(device device.Device, handler adapter.Handler, opts ...Option) (ipstack
// Promiscuous mode. https://github.com/google/gvisor/issues/3876
//
// Ref: https://github.com/cloudflare/slirpnetstack/blob/master/stack.go
withPromiscuousMode(nicPromiscuousModeEnabled),
withPromiscuousMode(nicID, nicPromiscuousModeEnabled),
// Enable spoofing if a stack may send packets from unowned addresses.
// This change required changes to some netgophers since previously,
// promiscuous mode was enough to let the netstack respond to all
// incoming packets regardless of the packet's destination address. Now
// that a stack.Route is not held for each incoming packet, finding a route
// may fail with local addresses we don't own but accepted packets for
// while in promiscuous mode. Since we also want to be able to send from
// any address (in response the received promiscuous mode packets), we need
// to enable spoofing.
// Enable spoofing if a stack may send packets from unowned
// addresses. This change required changes to some netgophers
// since previously, promiscuous mode was enough to let the
// netstack respond to all incoming packets regardless of the
// packet's destination address. Now that a stack.Route is not
// held for each incoming packet, finding a route may fail with
// local addresses we don't own but accepted packets for while
// in promiscuous mode. Since we also want to be able to send
// from any address (in response the received promiscuous mode
// packets), we need to enable spoofing.
//
// Ref: https://github.com/google/gvisor/commit/8c0701462a84ff77e602f1626aec49479c308127
withSpoofing(nicSpoofingEnabled),
withSpoofing(nicID, nicSpoofingEnabled),
// Add default route table for IPv4 and IPv6. This will handle
// all incoming ICMP packets.
withRouteTable(nicID),
// Initiate transport protocol (TCP/UDP) with given handler.
withTCPHandler(handler.HandleTCP), withUDPHandler(handler.HandleUDP),
)
for _, opt := range opts {
if err := opt(s); err != nil {
if err := opt(s.Stack); err != nil {
return nil, err
}
}
return s, nil
}

11
listener/tun/ipstack/gvisor/tcp.go
View file

@ -4,6 +4,9 @@ import (
"fmt"
"time"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/adapter"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/option"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
"gvisor.dev/gvisor/pkg/tcpip/stack"
@ -37,9 +40,9 @@ const (
tcpKeepaliveInterval = 30 * time.Second
)
func withTCPHandler() Option {
return func(s *gvStack) error {
tcpForwarder := tcp.NewForwarder(s.Stack, defaultWndSize, maxConnAttempts, func(r *tcp.ForwarderRequest) {
func withTCPHandler(handle adapter.TCPHandleFunc) option.Option {
return func(s *stack.Stack) error {
tcpForwarder := tcp.NewForwarder(s, defaultWndSize, maxConnAttempts, func(r *tcp.ForwarderRequest) {
var wq waiter.Queue
ep, err := r.CreateEndpoint(&wq)
if err != nil {
@ -55,7 +58,7 @@ func withTCPHandler() Option {
TCPConn: gonet.NewTCPConn(&wq, ep),
id: r.ID(),
}
s.handler.HandleTCPConn(conn)
handle(conn)
})
s.SetTransportProtocolHandler(tcp.ProtocolNumber, tcpForwarder.HandlePacket)
return nil

11
listener/tun/ipstack/gvisor/udp.go
View file

@ -5,6 +5,7 @@ import (
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/adapter"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/option"
"gvisor.dev/gvisor/pkg/tcpip/adapters/gonet"
"gvisor.dev/gvisor/pkg/tcpip/stack"
@ -12,9 +13,9 @@ import (
"gvisor.dev/gvisor/pkg/waiter"
)
func withUDPHandler() Option {
return func(s *gvStack) error {
udpForwarder := udp.NewForwarder(s.Stack, func(r *udp.ForwarderRequest) {
func withUDPHandler(handle adapter.UDPHandleFunc) option.Option {
return func(s *stack.Stack) error {
udpForwarder := udp.NewForwarder(s, func(r *udp.ForwarderRequest) {
var wq waiter.Queue
ep, err := r.CreateEndpoint(&wq)
if err != nil {
@ -23,10 +24,10 @@ func withUDPHandler() Option {
}
conn := &udpConn{
UDPConn: gonet.NewUDPConn(s.Stack, &wq, ep),
UDPConn: gonet.NewUDPConn(s, &wq, ep),
id: r.ID(),
}
s.handler.HandleUDPConn(conn)
handle(conn)
})
s.SetTransportProtocolHandler(udp.ProtocolNumber, udpForwarder.HandlePacket)
return nil

14
listener/tun/ipstack/system/stack.go
View file

@ -36,8 +36,6 @@ func (s sysStack) Close() error {
return nil
}
var ipv4LoopBack = netip.MustParsePrefix("127.0.0.0/8")
func New(device device.Device, dnsHijack []netip.AddrPort, tunAddress netip.Prefix, tcpIn chan<- C.ConnContext, udpIn chan<- *inbound.PacketAdapter) (ipstack.Stack, error) {
var (
gateway = tunAddress.Masked().Addr().Next()
@ -71,12 +69,6 @@ func New(device device.Device, dnsHijack []netip.AddrPort, tunAddress netip.Pref
rAddrIp, _ := netip.AddrFromSlice(rAddr.IP)
rAddrPort := netip.AddrPortFrom(rAddrIp, uint16(rAddr.Port))
if ipv4LoopBack.Contains(rAddrIp) {
conn.Close()
continue
}
if D.ShouldHijackDns(dnsAddr, rAddrPort) {
go func() {
log.Debugln("[TUN] hijack dns tcp: %s", rAddrPort.String())
@ -149,12 +141,6 @@ func New(device device.Device, dnsHijack []netip.AddrPort, tunAddress netip.Pref
rAddrIp, _ := netip.AddrFromSlice(rAddr.IP)
rAddrPort := netip.AddrPortFrom(rAddrIp, uint16(rAddr.Port))
if ipv4LoopBack.Contains(rAddrIp) {
pool.Put(buf)
continue
}
if D.ShouldHijackDns(dnsAddr, rAddrPort) {
go func() {
defer pool.Put(buf)

3
listener/tun/tun_adapter.go
View file

@ -18,6 +18,7 @@ import (
"github.com/Dreamacro/clash/listener/tun/ipstack"
"github.com/Dreamacro/clash/listener/tun/ipstack/commons"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor"
"github.com/Dreamacro/clash/listener/tun/ipstack/gvisor/option"
"github.com/Dreamacro/clash/listener/tun/ipstack/system"
"github.com/Dreamacro/clash/log"
)
@ -67,7 +68,7 @@ func New(tunConf *config.Tun, tunAddressPrefix string, tcpIn chan<- C.ConnContex
DNSAdds: tunConf.DNSHijack,
TCPIn: tcpIn, UDPIn: udpIn,
},
gvisor.WithDefault(),
option.WithDefault(),
)
if err != nil {

8
main.go
View file

@ -100,13 +100,9 @@ func main() {
log.Fatalln("Parse config error: %s", err.Error())
}
defer executor.Shutdown()
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
<-sigCh
// cleanup
log.Warnln("Clash cleanup")
hub.Cleanup()
log.Warnln("Clash shutting down")
}