mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-30 04:21:29 +00:00
641 lines
14 KiB
Go
641 lines
14 KiB
Go
package inbound
|
|
|
|
import (
|
|
"context"
|
|
"encoding/binary"
|
|
"io"
|
|
"math/rand"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"github.com/sagernet/sing-box/common/tls"
|
|
"github.com/sagernet/sing-box/common/uot"
|
|
C "github.com/sagernet/sing-box/constant"
|
|
"github.com/sagernet/sing-box/log"
|
|
"github.com/sagernet/sing-box/option"
|
|
"github.com/sagernet/sing-box/transport/v2rayhttp"
|
|
"github.com/sagernet/sing/common"
|
|
"github.com/sagernet/sing/common/auth"
|
|
"github.com/sagernet/sing/common/buf"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
"github.com/sagernet/sing/common/rw"
|
|
sHttp "github.com/sagernet/sing/protocol/http"
|
|
)
|
|
|
|
var _ adapter.Inbound = (*Naive)(nil)
|
|
|
|
type Naive struct {
|
|
myInboundAdapter
|
|
authenticator *auth.Authenticator
|
|
tlsConfig tls.ServerConfig
|
|
httpServer *http.Server
|
|
h3Server any
|
|
}
|
|
|
|
func NewNaive(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.NaiveInboundOptions) (*Naive, error) {
|
|
inbound := &Naive{
|
|
myInboundAdapter: myInboundAdapter{
|
|
protocol: C.TypeNaive,
|
|
network: options.Network.Build(),
|
|
ctx: ctx,
|
|
router: uot.NewRouter(router, logger),
|
|
logger: logger,
|
|
tag: tag,
|
|
listenOptions: options.ListenOptions,
|
|
},
|
|
authenticator: auth.NewAuthenticator(options.Users),
|
|
}
|
|
if common.Contains(inbound.network, N.NetworkUDP) {
|
|
if options.TLS == nil || !options.TLS.Enabled {
|
|
return nil, E.New("TLS is required for QUIC server")
|
|
}
|
|
}
|
|
if len(options.Users) == 0 {
|
|
return nil, E.New("missing users")
|
|
}
|
|
if options.TLS != nil {
|
|
tlsConfig, err := tls.NewServer(ctx, logger, common.PtrValueOrDefault(options.TLS))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
inbound.tlsConfig = tlsConfig
|
|
}
|
|
return inbound, nil
|
|
}
|
|
|
|
func (n *Naive) Start() error {
|
|
var tlsConfig *tls.STDConfig
|
|
if n.tlsConfig != nil {
|
|
err := n.tlsConfig.Start()
|
|
if err != nil {
|
|
return E.Cause(err, "create TLS config")
|
|
}
|
|
tlsConfig, err = n.tlsConfig.Config()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if common.Contains(n.network, N.NetworkTCP) {
|
|
tcpListener, err := n.ListenTCP()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
n.httpServer = &http.Server{
|
|
Handler: n,
|
|
TLSConfig: tlsConfig,
|
|
BaseContext: func(listener net.Listener) context.Context {
|
|
return n.ctx
|
|
},
|
|
}
|
|
go func() {
|
|
var sErr error
|
|
if tlsConfig != nil {
|
|
sErr = n.httpServer.ServeTLS(tcpListener, "", "")
|
|
} else {
|
|
sErr = n.httpServer.Serve(tcpListener)
|
|
}
|
|
if sErr != nil && !E.IsClosedOrCanceled(sErr) {
|
|
n.logger.Error("http server serve error: ", sErr)
|
|
}
|
|
}()
|
|
}
|
|
|
|
if common.Contains(n.network, N.NetworkUDP) {
|
|
err := n.configureHTTP3Listener()
|
|
if !C.WithQUIC && len(n.network) > 1 {
|
|
n.logger.Warn(E.Cause(err, "naive http3 disabled"))
|
|
} else if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (n *Naive) Close() error {
|
|
return common.Close(
|
|
&n.myInboundAdapter,
|
|
common.PtrOrNil(n.httpServer),
|
|
n.h3Server,
|
|
n.tlsConfig,
|
|
)
|
|
}
|
|
|
|
func (n *Naive) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
|
|
ctx := log.ContextWithNewID(request.Context())
|
|
if request.Method != "CONNECT" {
|
|
rejectHTTP(writer, http.StatusBadRequest)
|
|
n.badRequest(ctx, request, E.New("not CONNECT request"))
|
|
return
|
|
} else if request.Header.Get("Padding") == "" {
|
|
rejectHTTP(writer, http.StatusBadRequest)
|
|
n.badRequest(ctx, request, E.New("missing naive padding"))
|
|
return
|
|
}
|
|
userName, password, authOk := sHttp.ParseBasicAuth(request.Header.Get("Proxy-Authorization"))
|
|
if authOk {
|
|
authOk = n.authenticator.Verify(userName, password)
|
|
}
|
|
if !authOk {
|
|
rejectHTTP(writer, http.StatusProxyAuthRequired)
|
|
n.badRequest(ctx, request, E.New("authorization failed"))
|
|
return
|
|
}
|
|
writer.Header().Set("Padding", generateNaivePaddingHeader())
|
|
writer.WriteHeader(http.StatusOK)
|
|
writer.(http.Flusher).Flush()
|
|
|
|
hostPort := request.URL.Host
|
|
if hostPort == "" {
|
|
hostPort = request.Host
|
|
}
|
|
source := sHttp.SourceAddress(request)
|
|
destination := M.ParseSocksaddr(hostPort)
|
|
|
|
if hijacker, isHijacker := writer.(http.Hijacker); isHijacker {
|
|
conn, _, err := hijacker.Hijack()
|
|
if err != nil {
|
|
n.badRequest(ctx, request, E.New("hijack failed"))
|
|
return
|
|
}
|
|
n.newConnection(ctx, false, &naiveH1Conn{Conn: conn}, userName, source, destination)
|
|
} else {
|
|
n.newConnection(ctx, true, &naiveH2Conn{reader: request.Body, writer: writer, flusher: writer.(http.Flusher)}, userName, source, destination)
|
|
}
|
|
}
|
|
|
|
func (n *Naive) newConnection(ctx context.Context, waitForClose bool, conn net.Conn, userName string, source M.Socksaddr, destination M.Socksaddr) {
|
|
if userName != "" {
|
|
n.logger.InfoContext(ctx, "[", userName, "] inbound connection from ", source)
|
|
n.logger.InfoContext(ctx, "[", userName, "] inbound connection to ", destination)
|
|
} else {
|
|
n.logger.InfoContext(ctx, "inbound connection from ", source)
|
|
n.logger.InfoContext(ctx, "inbound connection to ", destination)
|
|
}
|
|
metadata := n.createMetadata(conn, adapter.InboundContext{
|
|
Source: source,
|
|
Destination: destination,
|
|
User: userName,
|
|
})
|
|
if !waitForClose {
|
|
n.router.RouteConnectionEx(ctx, conn, metadata, nil)
|
|
} else {
|
|
done := make(chan struct{})
|
|
wrapper := v2rayhttp.NewHTTP2Wrapper(conn)
|
|
n.router.RouteConnectionEx(ctx, conn, metadata, N.OnceClose(func(it error) {
|
|
close(done)
|
|
}))
|
|
<-done
|
|
wrapper.CloseWrapper()
|
|
}
|
|
}
|
|
|
|
func (n *Naive) badRequest(ctx context.Context, request *http.Request, err error) {
|
|
n.logger.ErrorContext(ctx, E.Cause(err, "process connection from ", request.RemoteAddr))
|
|
}
|
|
|
|
func rejectHTTP(writer http.ResponseWriter, statusCode int) {
|
|
hijacker, ok := writer.(http.Hijacker)
|
|
if !ok {
|
|
writer.WriteHeader(statusCode)
|
|
return
|
|
}
|
|
conn, _, err := hijacker.Hijack()
|
|
if err != nil {
|
|
writer.WriteHeader(statusCode)
|
|
return
|
|
}
|
|
if tcpConn, isTCP := common.Cast[*net.TCPConn](conn); isTCP {
|
|
tcpConn.SetLinger(0)
|
|
}
|
|
conn.Close()
|
|
}
|
|
|
|
func generateNaivePaddingHeader() string {
|
|
paddingLen := rand.Intn(32) + 30
|
|
padding := make([]byte, paddingLen)
|
|
bits := rand.Uint64()
|
|
for i := 0; i < 16; i++ {
|
|
// Codes that won't be Huffman coded.
|
|
padding[i] = "!#$()+<>?@[]^`{}"[bits&15]
|
|
bits >>= 4
|
|
}
|
|
for i := 16; i < paddingLen; i++ {
|
|
padding[i] = '~'
|
|
}
|
|
return string(padding)
|
|
}
|
|
|
|
const kFirstPaddings = 8
|
|
|
|
type naiveH1Conn struct {
|
|
net.Conn
|
|
readPadding int
|
|
writePadding int
|
|
readRemaining int
|
|
paddingRemaining int
|
|
}
|
|
|
|
func (c *naiveH1Conn) Read(p []byte) (n int, err error) {
|
|
n, err = c.read(p)
|
|
return n, wrapHttpError(err)
|
|
}
|
|
|
|
func (c *naiveH1Conn) read(p []byte) (n int, err error) {
|
|
if c.readRemaining > 0 {
|
|
if len(p) > c.readRemaining {
|
|
p = p[:c.readRemaining]
|
|
}
|
|
n, err = c.Conn.Read(p)
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.readRemaining -= n
|
|
return
|
|
}
|
|
if c.paddingRemaining > 0 {
|
|
err = rw.SkipN(c.Conn, c.paddingRemaining)
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.paddingRemaining = 0
|
|
}
|
|
if c.readPadding < kFirstPaddings {
|
|
var paddingHdr []byte
|
|
if len(p) >= 3 {
|
|
paddingHdr = p[:3]
|
|
} else {
|
|
paddingHdr = make([]byte, 3)
|
|
}
|
|
_, err = io.ReadFull(c.Conn, paddingHdr)
|
|
if err != nil {
|
|
return
|
|
}
|
|
originalDataSize := int(binary.BigEndian.Uint16(paddingHdr[:2]))
|
|
paddingSize := int(paddingHdr[2])
|
|
if len(p) > originalDataSize {
|
|
p = p[:originalDataSize]
|
|
}
|
|
n, err = c.Conn.Read(p)
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.readPadding++
|
|
c.readRemaining = originalDataSize - n
|
|
c.paddingRemaining = paddingSize
|
|
return
|
|
}
|
|
return c.Conn.Read(p)
|
|
}
|
|
|
|
func (c *naiveH1Conn) Write(p []byte) (n int, err error) {
|
|
for pLen := len(p); pLen > 0; {
|
|
var data []byte
|
|
if pLen > 65535 {
|
|
data = p[:65535]
|
|
p = p[65535:]
|
|
pLen -= 65535
|
|
} else {
|
|
data = p
|
|
pLen = 0
|
|
}
|
|
var writeN int
|
|
writeN, err = c.write(data)
|
|
n += writeN
|
|
if err != nil {
|
|
break
|
|
}
|
|
}
|
|
return n, wrapHttpError(err)
|
|
}
|
|
|
|
func (c *naiveH1Conn) write(p []byte) (n int, err error) {
|
|
if c.writePadding < kFirstPaddings {
|
|
paddingSize := rand.Intn(256)
|
|
|
|
buffer := buf.NewSize(3 + len(p) + paddingSize)
|
|
defer buffer.Release()
|
|
header := buffer.Extend(3)
|
|
binary.BigEndian.PutUint16(header, uint16(len(p)))
|
|
header[2] = byte(paddingSize)
|
|
|
|
common.Must1(buffer.Write(p))
|
|
_, err = c.Conn.Write(buffer.Bytes())
|
|
if err == nil {
|
|
n = len(p)
|
|
}
|
|
c.writePadding++
|
|
return
|
|
}
|
|
return c.Conn.Write(p)
|
|
}
|
|
|
|
func (c *naiveH1Conn) FrontHeadroom() int {
|
|
if c.writePadding < kFirstPaddings {
|
|
return 3
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (c *naiveH1Conn) RearHeadroom() int {
|
|
if c.writePadding < kFirstPaddings {
|
|
return 255
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (c *naiveH1Conn) WriterMTU() int {
|
|
if c.writePadding < kFirstPaddings {
|
|
return 65535
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (c *naiveH1Conn) WriteBuffer(buffer *buf.Buffer) error {
|
|
defer buffer.Release()
|
|
if c.writePadding < kFirstPaddings {
|
|
bufferLen := buffer.Len()
|
|
if bufferLen > 65535 {
|
|
return common.Error(c.Write(buffer.Bytes()))
|
|
}
|
|
paddingSize := rand.Intn(256)
|
|
header := buffer.ExtendHeader(3)
|
|
binary.BigEndian.PutUint16(header, uint16(bufferLen))
|
|
header[2] = byte(paddingSize)
|
|
buffer.Extend(paddingSize)
|
|
c.writePadding++
|
|
}
|
|
return wrapHttpError(common.Error(c.Conn.Write(buffer.Bytes())))
|
|
}
|
|
|
|
// FIXME
|
|
/*func (c *naiveH1Conn) WriteTo(w io.Writer) (n int64, err error) {
|
|
if c.readPadding < kFirstPaddings {
|
|
n, err = bufio.WriteToN(c, w, kFirstPaddings-c.readPadding)
|
|
} else {
|
|
n, err = bufio.Copy(w, c.Conn)
|
|
}
|
|
return n, wrapHttpError(err)
|
|
}
|
|
|
|
func (c *naiveH1Conn) ReadFrom(r io.Reader) (n int64, err error) {
|
|
if c.writePadding < kFirstPaddings {
|
|
n, err = bufio.ReadFromN(c, r, kFirstPaddings-c.writePadding)
|
|
} else {
|
|
n, err = bufio.Copy(c.Conn, r)
|
|
}
|
|
return n, wrapHttpError(err)
|
|
}
|
|
*/
|
|
|
|
func (c *naiveH1Conn) Upstream() any {
|
|
return c.Conn
|
|
}
|
|
|
|
func (c *naiveH1Conn) ReaderReplaceable() bool {
|
|
return c.readPadding == kFirstPaddings
|
|
}
|
|
|
|
func (c *naiveH1Conn) WriterReplaceable() bool {
|
|
return c.writePadding == kFirstPaddings
|
|
}
|
|
|
|
type naiveH2Conn struct {
|
|
reader io.Reader
|
|
writer io.Writer
|
|
flusher http.Flusher
|
|
rAddr net.Addr
|
|
readPadding int
|
|
writePadding int
|
|
readRemaining int
|
|
paddingRemaining int
|
|
}
|
|
|
|
func (c *naiveH2Conn) Read(p []byte) (n int, err error) {
|
|
n, err = c.read(p)
|
|
return n, wrapHttpError(err)
|
|
}
|
|
|
|
func (c *naiveH2Conn) read(p []byte) (n int, err error) {
|
|
if c.readRemaining > 0 {
|
|
if len(p) > c.readRemaining {
|
|
p = p[:c.readRemaining]
|
|
}
|
|
n, err = c.reader.Read(p)
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.readRemaining -= n
|
|
return
|
|
}
|
|
if c.paddingRemaining > 0 {
|
|
err = rw.SkipN(c.reader, c.paddingRemaining)
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.paddingRemaining = 0
|
|
}
|
|
if c.readPadding < kFirstPaddings {
|
|
var paddingHdr []byte
|
|
if len(p) >= 3 {
|
|
paddingHdr = p[:3]
|
|
} else {
|
|
paddingHdr = make([]byte, 3)
|
|
}
|
|
_, err = io.ReadFull(c.reader, paddingHdr)
|
|
if err != nil {
|
|
return
|
|
}
|
|
originalDataSize := int(binary.BigEndian.Uint16(paddingHdr[:2]))
|
|
paddingSize := int(paddingHdr[2])
|
|
if len(p) > originalDataSize {
|
|
p = p[:originalDataSize]
|
|
}
|
|
n, err = c.reader.Read(p)
|
|
if err != nil {
|
|
return
|
|
}
|
|
c.readPadding++
|
|
c.readRemaining = originalDataSize - n
|
|
c.paddingRemaining = paddingSize
|
|
return
|
|
}
|
|
return c.reader.Read(p)
|
|
}
|
|
|
|
func (c *naiveH2Conn) Write(p []byte) (n int, err error) {
|
|
for pLen := len(p); pLen > 0; {
|
|
var data []byte
|
|
if pLen > 65535 {
|
|
data = p[:65535]
|
|
p = p[65535:]
|
|
pLen -= 65535
|
|
} else {
|
|
data = p
|
|
pLen = 0
|
|
}
|
|
var writeN int
|
|
writeN, err = c.write(data)
|
|
n += writeN
|
|
if err != nil {
|
|
break
|
|
}
|
|
}
|
|
if err == nil {
|
|
c.flusher.Flush()
|
|
}
|
|
return n, wrapHttpError(err)
|
|
}
|
|
|
|
func (c *naiveH2Conn) write(p []byte) (n int, err error) {
|
|
if c.writePadding < kFirstPaddings {
|
|
paddingSize := rand.Intn(256)
|
|
|
|
buffer := buf.NewSize(3 + len(p) + paddingSize)
|
|
defer buffer.Release()
|
|
header := buffer.Extend(3)
|
|
binary.BigEndian.PutUint16(header, uint16(len(p)))
|
|
header[2] = byte(paddingSize)
|
|
|
|
common.Must1(buffer.Write(p))
|
|
_, err = c.writer.Write(buffer.Bytes())
|
|
if err == nil {
|
|
n = len(p)
|
|
}
|
|
c.writePadding++
|
|
return
|
|
}
|
|
return c.writer.Write(p)
|
|
}
|
|
|
|
func (c *naiveH2Conn) FrontHeadroom() int {
|
|
if c.writePadding < kFirstPaddings {
|
|
return 3
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (c *naiveH2Conn) RearHeadroom() int {
|
|
if c.writePadding < kFirstPaddings {
|
|
return 255
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (c *naiveH2Conn) WriterMTU() int {
|
|
if c.writePadding < kFirstPaddings {
|
|
return 65535
|
|
}
|
|
return 0
|
|
}
|
|
|
|
func (c *naiveH2Conn) WriteBuffer(buffer *buf.Buffer) error {
|
|
defer buffer.Release()
|
|
if c.writePadding < kFirstPaddings {
|
|
bufferLen := buffer.Len()
|
|
if bufferLen > 65535 {
|
|
return common.Error(c.Write(buffer.Bytes()))
|
|
}
|
|
paddingSize := rand.Intn(256)
|
|
header := buffer.ExtendHeader(3)
|
|
binary.BigEndian.PutUint16(header, uint16(bufferLen))
|
|
header[2] = byte(paddingSize)
|
|
buffer.Extend(paddingSize)
|
|
c.writePadding++
|
|
}
|
|
err := common.Error(c.writer.Write(buffer.Bytes()))
|
|
if err == nil {
|
|
c.flusher.Flush()
|
|
}
|
|
return wrapHttpError(err)
|
|
}
|
|
|
|
// FIXME
|
|
/*func (c *naiveH2Conn) WriteTo(w io.Writer) (n int64, err error) {
|
|
if c.readPadding < kFirstPaddings {
|
|
n, err = bufio.WriteToN(c, w, kFirstPaddings-c.readPadding)
|
|
} else {
|
|
n, err = bufio.Copy(w, c.reader)
|
|
}
|
|
return n, wrapHttpError(err)
|
|
}
|
|
|
|
func (c *naiveH2Conn) ReadFrom(r io.Reader) (n int64, err error) {
|
|
if c.writePadding < kFirstPaddings {
|
|
n, err = bufio.ReadFromN(c, r, kFirstPaddings-c.writePadding)
|
|
} else {
|
|
n, err = bufio.Copy(c.writer, r)
|
|
}
|
|
return n, wrapHttpError(err)
|
|
}*/
|
|
|
|
func (c *naiveH2Conn) Close() error {
|
|
return common.Close(
|
|
c.reader,
|
|
c.writer,
|
|
)
|
|
}
|
|
|
|
func (c *naiveH2Conn) LocalAddr() net.Addr {
|
|
return M.Socksaddr{}
|
|
}
|
|
|
|
func (c *naiveH2Conn) RemoteAddr() net.Addr {
|
|
return c.rAddr
|
|
}
|
|
|
|
func (c *naiveH2Conn) SetDeadline(t time.Time) error {
|
|
return os.ErrInvalid
|
|
}
|
|
|
|
func (c *naiveH2Conn) SetReadDeadline(t time.Time) error {
|
|
return os.ErrInvalid
|
|
}
|
|
|
|
func (c *naiveH2Conn) SetWriteDeadline(t time.Time) error {
|
|
return os.ErrInvalid
|
|
}
|
|
|
|
func (c *naiveH2Conn) NeedAdditionalReadDeadline() bool {
|
|
return true
|
|
}
|
|
|
|
func (c *naiveH2Conn) UpstreamReader() any {
|
|
return c.reader
|
|
}
|
|
|
|
func (c *naiveH2Conn) UpstreamWriter() any {
|
|
return c.writer
|
|
}
|
|
|
|
func (c *naiveH2Conn) ReaderReplaceable() bool {
|
|
return c.readPadding == kFirstPaddings
|
|
}
|
|
|
|
func (c *naiveH2Conn) WriterReplaceable() bool {
|
|
return c.writePadding == kFirstPaddings
|
|
}
|
|
|
|
func wrapHttpError(err error) error {
|
|
if err == nil {
|
|
return err
|
|
}
|
|
if strings.Contains(err.Error(), "client disconnected") {
|
|
return net.ErrClosed
|
|
}
|
|
if strings.Contains(err.Error(), "body closed by handler") {
|
|
return net.ErrClosed
|
|
}
|
|
if strings.Contains(err.Error(), "canceled with error code 268") {
|
|
return io.EOF
|
|
}
|
|
return err
|
|
}
|