mirror of https://github.com/XTLS/Xray-core
241 lines
7.0 KiB
Go
241 lines
7.0 KiB
Go
package encoding
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//go:generate go run github.com/xtls/xray-core/common/errors/errorgen
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import (
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"context"
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"fmt"
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"io"
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"runtime"
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"syscall"
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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/protocol"
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"github.com/xtls/xray-core/common/session"
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"github.com/xtls/xray-core/common/signal"
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"github.com/xtls/xray-core/features/stats"
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"github.com/xtls/xray-core/proxy/vless"
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"github.com/xtls/xray-core/transport/internet/stat"
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"github.com/xtls/xray-core/transport/internet/xtls"
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)
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const (
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Version = byte(0)
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)
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var addrParser = protocol.NewAddressParser(
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protocol.AddressFamilyByte(byte(protocol.AddressTypeIPv4), net.AddressFamilyIPv4),
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protocol.AddressFamilyByte(byte(protocol.AddressTypeDomain), net.AddressFamilyDomain),
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protocol.AddressFamilyByte(byte(protocol.AddressTypeIPv6), net.AddressFamilyIPv6),
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protocol.PortThenAddress(),
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)
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// EncodeRequestHeader writes encoded request header into the given writer.
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func EncodeRequestHeader(writer io.Writer, request *protocol.RequestHeader, requestAddons *Addons) error {
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buffer := buf.StackNew()
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defer buffer.Release()
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if err := buffer.WriteByte(request.Version); err != nil {
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return newError("failed to write request version").Base(err)
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}
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if _, err := buffer.Write(request.User.Account.(*vless.MemoryAccount).ID.Bytes()); err != nil {
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return newError("failed to write request user id").Base(err)
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}
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if err := EncodeHeaderAddons(&buffer, requestAddons); err != nil {
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return newError("failed to encode request header addons").Base(err)
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}
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if err := buffer.WriteByte(byte(request.Command)); err != nil {
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return newError("failed to write request command").Base(err)
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}
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if request.Command != protocol.RequestCommandMux {
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if err := addrParser.WriteAddressPort(&buffer, request.Address, request.Port); err != nil {
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return newError("failed to write request address and port").Base(err)
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}
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}
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if _, err := writer.Write(buffer.Bytes()); err != nil {
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return newError("failed to write request header").Base(err)
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}
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return nil
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}
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// DecodeRequestHeader decodes and returns (if successful) a RequestHeader from an input stream.
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func DecodeRequestHeader(isfb bool, first *buf.Buffer, reader io.Reader, validator *vless.Validator) (*protocol.RequestHeader, *Addons, bool, error) {
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buffer := buf.StackNew()
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defer buffer.Release()
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request := new(protocol.RequestHeader)
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if isfb {
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request.Version = first.Byte(0)
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} else {
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if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
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return nil, nil, false, newError("failed to read request version").Base(err)
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}
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request.Version = buffer.Byte(0)
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}
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switch request.Version {
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case 0:
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var id [16]byte
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if isfb {
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copy(id[:], first.BytesRange(1, 17))
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} else {
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buffer.Clear()
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if _, err := buffer.ReadFullFrom(reader, 16); err != nil {
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return nil, nil, false, newError("failed to read request user id").Base(err)
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}
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copy(id[:], buffer.Bytes())
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}
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if request.User = validator.Get(id); request.User == nil {
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return nil, nil, isfb, newError("invalid request user id")
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}
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if isfb {
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first.Advance(17)
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}
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requestAddons, err := DecodeHeaderAddons(&buffer, reader)
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if err != nil {
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return nil, nil, false, newError("failed to decode request header addons").Base(err)
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}
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buffer.Clear()
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if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
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return nil, nil, false, newError("failed to read request command").Base(err)
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}
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request.Command = protocol.RequestCommand(buffer.Byte(0))
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switch request.Command {
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case protocol.RequestCommandMux:
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request.Address = net.DomainAddress("v1.mux.cool")
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request.Port = 0
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case protocol.RequestCommandTCP, protocol.RequestCommandUDP:
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if addr, port, err := addrParser.ReadAddressPort(&buffer, reader); err == nil {
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request.Address = addr
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request.Port = port
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}
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}
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if request.Address == nil {
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return nil, nil, false, newError("invalid request address")
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}
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return request, requestAddons, false, nil
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default:
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return nil, nil, isfb, newError("invalid request version")
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}
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}
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// EncodeResponseHeader writes encoded response header into the given writer.
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func EncodeResponseHeader(writer io.Writer, request *protocol.RequestHeader, responseAddons *Addons) error {
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buffer := buf.StackNew()
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defer buffer.Release()
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if err := buffer.WriteByte(request.Version); err != nil {
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return newError("failed to write response version").Base(err)
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}
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if err := EncodeHeaderAddons(&buffer, responseAddons); err != nil {
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return newError("failed to encode response header addons").Base(err)
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}
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if _, err := writer.Write(buffer.Bytes()); err != nil {
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return newError("failed to write response header").Base(err)
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}
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return nil
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}
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// DecodeResponseHeader decodes and returns (if successful) a ResponseHeader from an input stream.
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func DecodeResponseHeader(reader io.Reader, request *protocol.RequestHeader) (*Addons, error) {
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buffer := buf.StackNew()
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defer buffer.Release()
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if _, err := buffer.ReadFullFrom(reader, 1); err != nil {
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return nil, newError("failed to read response version").Base(err)
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}
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if buffer.Byte(0) != request.Version {
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return nil, newError("unexpected response version. Expecting ", int(request.Version), " but actually ", int(buffer.Byte(0)))
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}
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responseAddons, err := DecodeHeaderAddons(&buffer, reader)
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if err != nil {
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return nil, newError("failed to decode response header addons").Base(err)
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}
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return responseAddons, nil
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}
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func ReadV(reader buf.Reader, writer buf.Writer, timer signal.ActivityUpdater, conn *xtls.Conn, rawConn syscall.RawConn, counter stats.Counter, sctx context.Context) error {
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err := func() error {
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var ct stats.Counter
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for {
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if conn.DirectIn {
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conn.DirectIn = false
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if sctx != nil {
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if inbound := session.InboundFromContext(sctx); inbound != nil && inbound.Conn != nil {
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iConn := inbound.Conn
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statConn, ok := iConn.(*stat.CounterConnection)
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if ok {
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iConn = statConn.Connection
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}
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if xc, ok := iConn.(*xtls.Conn); ok {
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iConn = xc.NetConn()
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}
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if tc, ok := iConn.(*net.TCPConn); ok {
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if conn.SHOW {
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fmt.Println(conn.MARK, "Splice")
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}
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runtime.Gosched() // necessary
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w, err := tc.ReadFrom(conn.NetConn())
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if counter != nil {
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counter.Add(w)
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}
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if statConn != nil && statConn.WriteCounter != nil {
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statConn.WriteCounter.Add(w)
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}
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return err
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} else {
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panic("XTLS Splice: not TCP inbound")
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}
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} else {
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// panic("XTLS Splice: nil inbound or nil inbound.Conn")
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}
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}
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reader = buf.NewReadVReader(conn.NetConn(), rawConn, nil)
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ct = counter
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if conn.SHOW {
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fmt.Println(conn.MARK, "ReadV")
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}
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}
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buffer, err := reader.ReadMultiBuffer()
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if !buffer.IsEmpty() {
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if ct != nil {
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ct.Add(int64(buffer.Len()))
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}
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timer.Update()
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if werr := writer.WriteMultiBuffer(buffer); werr != nil {
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return werr
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}
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}
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if err != nil {
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return err
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}
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}
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}()
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if err != nil && errors.Cause(err) != io.EOF {
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return err
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}
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return nil
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}
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