mirror of
https://github.com/XTLS/Xray-core.git
synced 2026-05-08 14:13:22 +00:00
607 lines
18 KiB
Go
607 lines
18 KiB
Go
package splithttp
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import (
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"context"
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gotls "crypto/tls"
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"fmt"
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"io"
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"math/rand"
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"net/http"
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"net/http/httptrace"
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"net/url"
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reflect "reflect"
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"runtime"
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"strconv"
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"sync"
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"sync/atomic"
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"time"
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"github.com/apernet/quic-go"
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"github.com/apernet/quic-go/http3"
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"github.com/xtls/xray-core/common"
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"github.com/xtls/xray-core/common/buf"
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"github.com/xtls/xray-core/common/errors"
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"github.com/xtls/xray-core/common/net"
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"github.com/xtls/xray-core/common/net/cnc"
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"github.com/xtls/xray-core/common/signal/done"
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"github.com/xtls/xray-core/common/uuid"
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"github.com/xtls/xray-core/transport/internet"
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"github.com/xtls/xray-core/transport/internet/browser_dialer"
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"github.com/xtls/xray-core/transport/internet/hysteria/congestion"
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"github.com/xtls/xray-core/transport/internet/hysteria/congestion/bbr"
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"github.com/xtls/xray-core/transport/internet/hysteria/udphop"
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"github.com/xtls/xray-core/transport/internet/reality"
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"github.com/xtls/xray-core/transport/internet/stat"
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"github.com/xtls/xray-core/transport/internet/tls"
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"github.com/xtls/xray-core/transport/pipe"
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"golang.org/x/net/http2"
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)
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type dialerConf struct {
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net.Destination
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*internet.MemoryStreamConfig
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}
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var (
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globalDialerMap map[dialerConf]*XmuxManager
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globalDialerAccess sync.Mutex
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)
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func getHTTPClient(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (DialerClient, *XmuxClient) {
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realityConfig := reality.ConfigFromStreamSettings(streamSettings)
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if browser_dialer.HasBrowserDialer() && realityConfig == nil {
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return &BrowserDialerClient{transportConfig: streamSettings.ProtocolSettings.(*Config)}, nil
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}
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globalDialerAccess.Lock()
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defer globalDialerAccess.Unlock()
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if globalDialerMap == nil {
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globalDialerMap = make(map[dialerConf]*XmuxManager)
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}
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key := dialerConf{dest, streamSettings}
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xmuxManager, found := globalDialerMap[key]
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if !found {
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transportConfig := streamSettings.ProtocolSettings.(*Config)
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var xmuxConfig XmuxConfig
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if transportConfig.Xmux != nil {
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xmuxConfig = *transportConfig.Xmux
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}
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xmuxManager = NewXmuxManager(xmuxConfig, func() XmuxConn {
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return createHTTPClient(dest, streamSettings)
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})
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globalDialerMap[key] = xmuxManager
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}
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xmuxClient := xmuxManager.GetXmuxClient(ctx)
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return xmuxClient.XmuxConn.(DialerClient), xmuxClient
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}
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func decideHTTPVersion(tlsConfig *tls.Config, realityConfig *reality.Config) string {
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if realityConfig != nil {
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return "2"
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}
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if tlsConfig == nil {
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return "1.1"
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}
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if len(tlsConfig.NextProtocol) != 1 {
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return "2"
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}
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if tlsConfig.NextProtocol[0] == "http/1.1" {
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return "1.1"
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}
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if tlsConfig.NextProtocol[0] == "h3" {
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return "3"
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}
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return "2"
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}
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func createHTTPClient(dest net.Destination, streamSettings *internet.MemoryStreamConfig) DialerClient {
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tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
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realityConfig := reality.ConfigFromStreamSettings(streamSettings)
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httpVersion := decideHTTPVersion(tlsConfig, realityConfig)
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if httpVersion == "3" {
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dest.Network = net.Network_UDP // better to keep this line
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}
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var gotlsConfig *gotls.Config
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if tlsConfig != nil {
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gotlsConfig = tlsConfig.GetTLSConfig(tls.WithDestination(dest))
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}
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transportConfig := streamSettings.ProtocolSettings.(*Config)
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dialContext := func(ctxInner context.Context) (net.Conn, error) {
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conn, err := internet.DialSystem(ctxInner, dest, streamSettings.SocketSettings)
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if err != nil {
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return nil, err
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}
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if streamSettings.TcpmaskManager != nil {
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newConn, err := streamSettings.TcpmaskManager.WrapConnClient(conn)
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if err != nil {
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conn.Close()
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return nil, errors.New("mask err").Base(err)
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}
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conn = newConn
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}
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if realityConfig != nil {
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return reality.UClient(conn, realityConfig, ctxInner, dest)
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}
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if gotlsConfig != nil {
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if fingerprint := tls.GetFingerprint(tlsConfig.Fingerprint); fingerprint != nil {
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conn = tls.UClient(conn, gotlsConfig, fingerprint)
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if err := conn.(*tls.UConn).HandshakeContext(ctxInner); err != nil {
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return nil, err
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}
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} else {
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conn = tls.Client(conn, gotlsConfig)
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}
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}
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return conn, nil
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}
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var keepAlivePeriod time.Duration
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if streamSettings.ProtocolSettings.(*Config).Xmux != nil {
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keepAlivePeriod = time.Duration(streamSettings.ProtocolSettings.(*Config).Xmux.HKeepAlivePeriod) * time.Second
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}
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var transport http.RoundTripper
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if httpVersion == "3" {
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quicParams := streamSettings.QuicParams
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if quicParams == nil {
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quicParams = &internet.QuicParams{
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BbrProfile: string(bbr.ProfileStandard),
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UdpHop: &internet.UdpHop{},
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}
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}
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quicConfig := &quic.Config{
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InitialStreamReceiveWindow: quicParams.InitStreamReceiveWindow,
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MaxStreamReceiveWindow: quicParams.MaxStreamReceiveWindow,
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InitialConnectionReceiveWindow: quicParams.InitConnReceiveWindow,
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MaxConnectionReceiveWindow: quicParams.MaxConnReceiveWindow,
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MaxIdleTimeout: time.Duration(quicParams.MaxIdleTimeout) * time.Second,
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KeepAlivePeriod: time.Duration(quicParams.KeepAlivePeriod) * time.Second,
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MaxIncomingStreams: quicParams.MaxIncomingStreams,
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DisablePathMTUDiscovery: quicParams.DisablePathMtuDiscovery || (runtime.GOOS != "linux" && runtime.GOOS != "windows" && runtime.GOOS != "darwin"),
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}
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if quicParams.MaxIdleTimeout == 0 {
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quicConfig.MaxIdleTimeout = net.ConnIdleTimeout
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}
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if quicParams.KeepAlivePeriod == 0 {
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if keepAlivePeriod == 0 {
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quicConfig.KeepAlivePeriod = net.QuicgoH3KeepAlivePeriod
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}
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}
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if quicParams.MaxIncomingStreams == 0 {
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// these two are defaults of quic-go/http3. the default of quic-go (no
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// http3) is different, so it is hardcoded here for clarity.
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// https://github.com/quic-go/quic-go/blob/b8ea5c798155950fb5bbfdd06cad1939c9355878/http3/client.go#L36-L39
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quicConfig.MaxIncomingStreams = -1
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}
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transport = &http3.Transport{
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QUICConfig: quicConfig,
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TLSClientConfig: gotlsConfig,
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Dial: func(ctx context.Context, addr string, tlsCfg *gotls.Config, cfg *quic.Config) (*quic.Conn, error) {
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udpHopDialer := func(addr *net.UDPAddr) (net.PacketConn, error) {
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conn, err := internet.DialSystem(ctx, net.UDPDestination(net.IPAddress(addr.IP), net.Port(addr.Port)), streamSettings.SocketSettings)
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if err != nil {
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errors.LogInfoInner(context.Background(), err, "skip hop: failed to dial to dest")
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return nil, errors.New("")
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}
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var pktConn net.PacketConn
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switch c := conn.(type) {
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case *internet.PacketConnWrapper:
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pktConn = c.PacketConn
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default:
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panic(reflect.TypeOf(c))
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}
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return pktConn, nil
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}
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var pktConn net.PacketConn
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var udpAddr *net.UDPAddr
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if len(quicParams.UdpHop.Ports) > 0 {
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index := rand.Intn(len(quicParams.UdpHop.Ports))
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dest.Port = net.Port(quicParams.UdpHop.Ports[index])
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conn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings)
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if err != nil {
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return nil, errors.New("failed to dial to dest").Base(err)
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}
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switch c := conn.(type) {
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case *internet.PacketConnWrapper:
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pktConn = c.PacketConn
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udpAddr = conn.RemoteAddr().(*net.UDPAddr)
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default:
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panic(reflect.TypeOf(c))
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}
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pktConn = udphop.NewUDPHopPacketConn(udphop.ToAddrs(udpAddr.IP, quicParams.UdpHop.Ports), time.Duration(quicParams.UdpHop.IntervalMin)*time.Second, time.Duration(quicParams.UdpHop.IntervalMax)*time.Second, udpHopDialer, pktConn, index)
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} else {
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conn, err := internet.DialSystem(ctx, dest, streamSettings.SocketSettings)
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if err != nil {
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return nil, errors.New("failed to dial to dest").Base(err)
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}
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switch c := conn.(type) {
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case *internet.PacketConnWrapper:
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pktConn = c.PacketConn
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udpAddr = c.RemoteAddr().(*net.UDPAddr)
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case *cnc.Connection:
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pktConn = &internet.FakePacketConn{Conn: c}
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udpAddr = &net.UDPAddr{IP: c.RemoteAddr().(*net.TCPAddr).IP, Port: c.RemoteAddr().(*net.TCPAddr).Port}
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default:
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panic(reflect.TypeOf(c))
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}
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}
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if streamSettings.UdpmaskManager != nil {
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newConn, err := streamSettings.UdpmaskManager.WrapPacketConnClient(pktConn)
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if err != nil {
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pktConn.Close()
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return nil, errors.New("mask err").Base(err)
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}
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pktConn = newConn
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}
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conn, err := quic.DialEarly(ctx, pktConn, udpAddr, tlsCfg, cfg)
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if err != nil {
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return nil, err
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}
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switch quicParams.Congestion {
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case "reno":
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case "", "bbr":
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congestion.UseBBR(conn, bbr.Profile(quicParams.BbrProfile))
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case "force-brutal":
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congestion.UseBrutal(conn, quicParams.BrutalUp)
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default:
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panic(quicParams.Congestion)
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}
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return conn, nil
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},
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}
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} else if httpVersion == "2" {
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if keepAlivePeriod == 0 {
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keepAlivePeriod = net.ChromeH2KeepAlivePeriod
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}
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if keepAlivePeriod < 0 {
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keepAlivePeriod = 0
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}
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transport = &http2.Transport{
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DialTLSContext: func(ctxInner context.Context, network string, addr string, cfg *gotls.Config) (net.Conn, error) {
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return dialContext(ctxInner)
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},
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IdleConnTimeout: net.ConnIdleTimeout,
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ReadIdleTimeout: keepAlivePeriod,
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}
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} else {
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httpDialContext := func(ctxInner context.Context, network string, addr string) (net.Conn, error) {
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return dialContext(ctxInner)
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}
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transport = &http.Transport{
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DialTLSContext: httpDialContext,
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DialContext: httpDialContext,
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IdleConnTimeout: net.ConnIdleTimeout,
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// chunked transfer download with KeepAlives is buggy with
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// http.Client and our custom dial context.
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DisableKeepAlives: true,
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}
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}
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client := &DefaultDialerClient{
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transportConfig: transportConfig,
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client: &http.Client{
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Transport: transport,
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},
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httpVersion: httpVersion,
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uploadRawPool: &sync.Pool{},
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dialUploadConn: dialContext,
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}
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return client
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}
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func init() {
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common.Must(internet.RegisterTransportDialer(protocolName, Dial))
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}
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func Dial(ctx context.Context, dest net.Destination, streamSettings *internet.MemoryStreamConfig) (stat.Connection, error) {
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tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
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realityConfig := reality.ConfigFromStreamSettings(streamSettings)
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httpVersion := decideHTTPVersion(tlsConfig, realityConfig)
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if httpVersion == "3" {
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dest.Network = net.Network_UDP
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}
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transportConfiguration := streamSettings.ProtocolSettings.(*Config)
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var requestURL url.URL
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if tlsConfig != nil || realityConfig != nil {
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requestURL.Scheme = "https"
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} else {
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requestURL.Scheme = "http"
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}
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requestURL.Host = transportConfiguration.Host
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if requestURL.Host == "" && tlsConfig != nil {
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requestURL.Host = tlsConfig.ServerName
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}
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if requestURL.Host == "" && realityConfig != nil {
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requestURL.Host = realityConfig.ServerName
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}
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if requestURL.Host == "" {
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requestURL.Host = dest.Address.String()
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}
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if browser_dialer.HasBrowserDialer() && realityConfig == nil {
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// For Browser Dialer's optimized IP and non-standard port
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if !(requestURL.Scheme == "http" && dest.Port == 80) && !(requestURL.Scheme == "https" && dest.Port == 443) {
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requestURL.Host += ":" + dest.Port.String()
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}
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}
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requestURL.Path = transportConfiguration.GetNormalizedPath()
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requestURL.RawQuery = transportConfiguration.GetNormalizedQuery()
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httpClient, xmuxClient := getHTTPClient(ctx, dest, streamSettings)
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mode := transportConfiguration.Mode
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if mode == "" || mode == "auto" {
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mode = "packet-up"
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if realityConfig != nil {
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mode = "stream-one"
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if transportConfiguration.DownloadSettings != nil {
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mode = "stream-up"
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}
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}
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}
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sessionId := ""
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if mode != "stream-one" {
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sessionIdUuid := uuid.New()
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sessionId = sessionIdUuid.String()
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}
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errors.LogInfo(ctx, fmt.Sprintf("XHTTP is dialing to %s, mode %s, HTTP version %s, host %s", dest, mode, httpVersion, requestURL.Host))
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requestURL2 := requestURL
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httpClient2 := httpClient
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xmuxClient2 := xmuxClient
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if transportConfiguration.DownloadSettings != nil {
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globalDialerAccess.Lock()
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if streamSettings.DownloadSettings == nil {
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streamSettings.DownloadSettings = common.Must2(internet.ToMemoryStreamConfig(transportConfiguration.DownloadSettings))
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if streamSettings.SocketSettings != nil && streamSettings.SocketSettings.Penetrate {
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streamSettings.DownloadSettings.SocketSettings = streamSettings.SocketSettings
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}
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}
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globalDialerAccess.Unlock()
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memory2 := streamSettings.DownloadSettings
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dest2 := *memory2.Destination // just panic
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tlsConfig2 := tls.ConfigFromStreamSettings(memory2)
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realityConfig2 := reality.ConfigFromStreamSettings(memory2)
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httpVersion2 := decideHTTPVersion(tlsConfig2, realityConfig2)
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if httpVersion2 == "3" {
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dest2.Network = net.Network_UDP
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}
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if tlsConfig2 != nil || realityConfig2 != nil {
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requestURL2.Scheme = "https"
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} else {
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requestURL2.Scheme = "http"
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}
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config2 := memory2.ProtocolSettings.(*Config)
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requestURL2.Host = config2.Host
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if requestURL2.Host == "" && tlsConfig2 != nil {
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requestURL2.Host = tlsConfig2.ServerName
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}
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if requestURL2.Host == "" && realityConfig2 != nil {
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requestURL2.Host = realityConfig2.ServerName
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}
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if requestURL2.Host == "" {
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requestURL2.Host = dest2.Address.String()
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}
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if browser_dialer.HasBrowserDialer() && realityConfig2 == nil {
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// For Browser Dialer's optimized IP and non-standard port
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if !(requestURL2.Scheme == "http" && dest2.Port == 80) && !(requestURL2.Scheme == "https" && dest2.Port == 443) {
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requestURL2.Host += ":" + dest2.Port.String()
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}
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}
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requestURL2.Path = config2.GetNormalizedPath()
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requestURL2.RawQuery = config2.GetNormalizedQuery()
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httpClient2, xmuxClient2 = getHTTPClient(ctx, dest2, memory2)
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errors.LogInfo(ctx, fmt.Sprintf("XHTTP is downloading from %s, mode %s, HTTP version %s, host %s", dest2, "stream-down", httpVersion2, requestURL2.Host))
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}
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if xmuxClient != nil {
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xmuxClient.OpenUsage.Add(1)
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}
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if xmuxClient2 != nil && xmuxClient2 != xmuxClient {
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xmuxClient2.OpenUsage.Add(1)
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}
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var closed atomic.Int32
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reader, writer := io.Pipe()
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conn := splitConn{
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writer: writer,
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onClose: func() {
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if closed.Add(1) > 1 {
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return
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}
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if xmuxClient != nil {
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xmuxClient.OpenUsage.Add(-1)
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}
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if xmuxClient2 != nil && xmuxClient2 != xmuxClient {
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xmuxClient2.OpenUsage.Add(-1)
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}
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},
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}
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var err error
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if mode == "stream-one" {
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requestURL.Path = transportConfiguration.GetNormalizedPath()
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if xmuxClient != nil {
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xmuxClient.LeftRequests.Add(-1)
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}
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conn.reader, conn.remoteAddr, conn.localAddr, err = httpClient.OpenStream(ctx, requestURL.String(), sessionId, reader, false)
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if err != nil { // browser dialer only
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return nil, err
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}
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return stat.Connection(&conn), nil
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} else { // stream-down
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if xmuxClient2 != nil {
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xmuxClient2.LeftRequests.Add(-1)
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}
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conn.reader, conn.remoteAddr, conn.localAddr, err = httpClient2.OpenStream(ctx, requestURL2.String(), sessionId, nil, false)
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if err != nil { // browser dialer only
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return nil, err
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}
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}
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if mode == "stream-up" {
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if xmuxClient != nil {
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xmuxClient.LeftRequests.Add(-1)
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}
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_, _, _, err = httpClient.OpenStream(ctx, requestURL.String(), sessionId, reader, true)
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if err != nil { // browser dialer only
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return nil, err
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}
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return stat.Connection(&conn), nil
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}
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scMaxEachPostBytes := transportConfiguration.GetNormalizedScMaxEachPostBytes()
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scMinPostsIntervalMs := transportConfiguration.GetNormalizedScMinPostsIntervalMs()
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|
|
if scMaxEachPostBytes.From <= 0 {
|
|
panic("`scMaxEachPostBytes` should be bigger than 0")
|
|
}
|
|
|
|
maxUploadSize := scMaxEachPostBytes.rand()
|
|
// WithSizeLimit(0) will still allow single bytes to pass, and a lot of
|
|
// code relies on this behavior. Subtract 1 so that together with
|
|
// uploadWriter wrapper, exact size limits can be enforced
|
|
// uploadPipeReader, uploadPipeWriter := pipe.New(pipe.WithSizeLimit(maxUploadSize - 1))
|
|
uploadPipeReader, uploadPipeWriter := pipe.New(pipe.WithSizeLimit(max(0, maxUploadSize-buf.Size)))
|
|
|
|
conn.writer = uploadWriter{
|
|
uploadPipeWriter,
|
|
maxUploadSize,
|
|
}
|
|
|
|
go func() {
|
|
var seq int64
|
|
var lastWrite time.Time
|
|
|
|
for {
|
|
// by offloading the uploads into a buffered pipe, multiple conn.Write
|
|
// calls get automatically batched together into larger POST requests.
|
|
// without batching, bandwidth is extremely limited.
|
|
remainder, err := uploadPipeReader.ReadMultiBuffer()
|
|
if err != nil {
|
|
break
|
|
}
|
|
|
|
doSplit := atomic.Bool{}
|
|
for doSplit.Store(true); doSplit.Load(); {
|
|
var chunk buf.MultiBuffer
|
|
remainder, chunk = buf.SplitSize(remainder, maxUploadSize)
|
|
if chunk.IsEmpty() {
|
|
break
|
|
}
|
|
|
|
wroteRequest := done.New()
|
|
|
|
ctx := httptrace.WithClientTrace(ctx, &httptrace.ClientTrace{
|
|
WroteRequest: func(httptrace.WroteRequestInfo) {
|
|
wroteRequest.Close()
|
|
},
|
|
})
|
|
|
|
seqStr := strconv.FormatInt(seq, 10)
|
|
seq += 1
|
|
|
|
if scMinPostsIntervalMs.From > 0 {
|
|
time.Sleep(time.Duration(scMinPostsIntervalMs.rand())*time.Millisecond - time.Since(lastWrite))
|
|
}
|
|
|
|
lastWrite = time.Now()
|
|
|
|
if xmuxClient != nil && (xmuxClient.LeftRequests.Add(-1) <= 0 ||
|
|
(xmuxClient.UnreusableAt != time.Time{} && lastWrite.After(xmuxClient.UnreusableAt))) {
|
|
httpClient, xmuxClient = getHTTPClient(ctx, dest, streamSettings)
|
|
}
|
|
|
|
go func() {
|
|
err := httpClient.PostPacket(
|
|
ctx,
|
|
requestURL.String(),
|
|
sessionId,
|
|
seqStr,
|
|
chunk,
|
|
)
|
|
wroteRequest.Close()
|
|
if err != nil {
|
|
errors.LogInfoInner(ctx, err, "failed to send upload")
|
|
uploadPipeReader.Interrupt()
|
|
doSplit.Store(false)
|
|
}
|
|
}()
|
|
|
|
if _, ok := httpClient.(*DefaultDialerClient); ok {
|
|
<-wroteRequest.Wait()
|
|
}
|
|
}
|
|
}
|
|
}()
|
|
|
|
return stat.Connection(&conn), nil
|
|
}
|
|
|
|
// A wrapper around pipe that ensures the size limit is exactly honored.
|
|
//
|
|
// The MultiBuffer pipe accepts any single WriteMultiBuffer call even if that
|
|
// single MultiBuffer exceeds the size limit, and then starts blocking on the
|
|
// next WriteMultiBuffer call. This means that ReadMultiBuffer can return more
|
|
// bytes than the size limit. We work around this by splitting a potentially
|
|
// too large write up into multiple.
|
|
type uploadWriter struct {
|
|
*pipe.Writer
|
|
maxLen int32
|
|
}
|
|
|
|
func (w uploadWriter) Write(b []byte) (int, error) {
|
|
/*
|
|
capacity := int(w.maxLen - w.Len())
|
|
if capacity > 0 && capacity < len(b) {
|
|
b = b[:capacity]
|
|
}
|
|
*/
|
|
|
|
buffer := buf.MultiBufferContainer{}
|
|
common.Must2(buffer.Write(b))
|
|
|
|
var writed int
|
|
for _, buff := range buffer.MultiBuffer {
|
|
err := w.WriteMultiBuffer(buf.MultiBuffer{buff})
|
|
if err != nil {
|
|
return writed, err
|
|
}
|
|
writed += int(buff.Len())
|
|
}
|
|
return writed, nil
|
|
}
|