mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-12-27 03:55:41 +08:00
254 lines
7.2 KiB
Go
254 lines
7.2 KiB
Go
package naive
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"math/rand"
|
|
"net"
|
|
"net/http"
|
|
|
|
"github.com/sagernet/sing-box/adapter"
|
|
"github.com/sagernet/sing-box/adapter/inbound"
|
|
"github.com/sagernet/sing-box/common/listener"
|
|
"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"
|
|
E "github.com/sagernet/sing/common/exceptions"
|
|
"github.com/sagernet/sing/common/logger"
|
|
M "github.com/sagernet/sing/common/metadata"
|
|
N "github.com/sagernet/sing/common/network"
|
|
sHttp "github.com/sagernet/sing/protocol/http"
|
|
)
|
|
|
|
var ConfigureHTTP3ListenerFunc func(listener *listener.Listener, handler http.Handler, tlsConfig tls.ServerConfig, logger logger.Logger) (io.Closer, error)
|
|
|
|
func RegisterInbound(registry *inbound.Registry) {
|
|
inbound.Register[option.NaiveInboundOptions](registry, C.TypeNaive, NewInbound)
|
|
}
|
|
|
|
type Inbound struct {
|
|
inbound.Adapter
|
|
ctx context.Context
|
|
router adapter.ConnectionRouterEx
|
|
logger logger.ContextLogger
|
|
listener *listener.Listener
|
|
network []string
|
|
networkIsDefault bool
|
|
authenticator *auth.Authenticator
|
|
tlsConfig tls.ServerConfig
|
|
httpServer *http.Server
|
|
h3Server io.Closer
|
|
}
|
|
|
|
func NewInbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.NaiveInboundOptions) (adapter.Inbound, error) {
|
|
inbound := &Inbound{
|
|
Adapter: inbound.NewAdapter(C.TypeNaive, tag),
|
|
ctx: ctx,
|
|
router: uot.NewRouter(router, logger),
|
|
logger: logger,
|
|
listener: listener.New(listener.Options{
|
|
Context: ctx,
|
|
Logger: logger,
|
|
Listen: options.ListenOptions,
|
|
}),
|
|
networkIsDefault: options.Network == "",
|
|
network: options.Network.Build(),
|
|
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 *Inbound) Start(stage adapter.StartStage) error {
|
|
if stage != adapter.StartStateStart {
|
|
return nil
|
|
}
|
|
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.listener.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) {
|
|
http3Server, err := ConfigureHTTP3ListenerFunc(n.listener, n, n.tlsConfig, n.logger)
|
|
if err == nil {
|
|
n.h3Server = http3Server
|
|
} else if len(n.network) > 1 {
|
|
n.logger.Warn(E.Cause(err, "naive http3 disabled"))
|
|
} else {
|
|
return err
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (n *Inbound) Close() error {
|
|
return common.Close(
|
|
&n.listener,
|
|
common.PtrOrNil(n.httpServer),
|
|
n.h3Server,
|
|
n.tlsConfig,
|
|
)
|
|
}
|
|
|
|
func (n *Inbound) 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 *Inbound) 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)
|
|
}
|
|
var metadata adapter.InboundContext
|
|
metadata.Inbound = n.Tag()
|
|
metadata.InboundType = n.Type()
|
|
//nolint:staticcheck
|
|
metadata.InboundDetour = n.listener.ListenOptions().Detour
|
|
//nolint:staticcheck
|
|
metadata.InboundOptions = n.listener.ListenOptions().InboundOptions
|
|
metadata.Source = source
|
|
metadata.Destination = destination
|
|
metadata.OriginDestination = M.SocksaddrFromNet(conn.LocalAddr()).Unwrap()
|
|
metadata.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 *Inbound) 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)
|
|
}
|