black-internet-days-ahead/sing-box
1
0
Fork 0
mirror of https://github.com/SagerNet/sing-box.git synced 2024-11-09 18:43:14 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add fallback support for v2ray transport

Browse source
This commit is contained in:
世界 2023-02-13 05:53:03 +08:00
parent a624cd9b49
commit 2bd91baad0
No known key found for this signature in database
GPG key ID: CD109927C34A63C4
13 changed files with 132 additions and 85 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
adapter/v2ray.go
View file

@ -3,6 +3,10 @@ package adapter
import (
"context"
"net"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
)
type V2RayServerTransport interface {
@ -12,6 +16,12 @@ type V2RayServerTransport interface {
Close() error
}
type V2RayServerTransportHandler interface {
N.TCPConnectionHandler
E.Handler
FallbackConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error
}
type V2RayClientTransport interface {
DialContext(ctx context.Context) (net.Conn, error)
}

20
inbound/trojan.go
View file

@ -89,7 +89,7 @@ func NewTrojan(ctx context.Context, router adapter.Router, logger log.ContextLog
return nil, err
}
if options.Transport != nil {
inbound.transport, err = v2ray.NewServerTransport(ctx, common.PtrValueOrDefault(options.Transport), inbound.tlsConfig, adapter.NewUpstreamHandler(adapter.InboundContext{}, inbound.newTransportConnection, nil, nil), inbound)
inbound.transport, err = v2ray.NewServerTransport(ctx, common.PtrValueOrDefault(options.Transport), inbound.tlsConfig, (*trojanTransportHandler)(inbound))
if err != nil {
return nil, E.Cause(err, "create server transport: ", options.Transport.Type)
}
@ -216,3 +216,21 @@ func (h *Trojan) newPacketConnection(ctx context.Context, conn N.PacketConn, met
h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
return h.router.RoutePacketConnection(ctx, conn, metadata)
}
var _ adapter.V2RayServerTransportHandler = (*trojanTransportHandler)(nil)
type trojanTransportHandler Trojan
func (t *trojanTransportHandler) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
return (*Trojan)(t).newTransportConnection(ctx, conn, adapter.InboundContext{
Source: metadata.Source,
Destination: metadata.Destination,
})
}
func (t *trojanTransportHandler) FallbackConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
return (*Trojan)(t).fallbackConnection(ctx, conn, adapter.InboundContext{
Source: metadata.Source,
Destination: metadata.Destination,
})
}

17
inbound/vmess.go
View file

@ -72,7 +72,7 @@ func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogg
}
}
if options.Transport != nil {
inbound.transport, err = v2ray.NewServerTransport(ctx, common.PtrValueOrDefault(options.Transport), inbound.tlsConfig, adapter.NewUpstreamHandler(adapter.InboundContext{}, inbound.newTransportConnection, nil, nil), inbound)
inbound.transport, err = v2ray.NewServerTransport(ctx, common.PtrValueOrDefault(options.Transport), inbound.tlsConfig, (*vmessTransportHandler)(inbound))
if err != nil {
return nil, E.Cause(err, "create server transport: ", options.Transport.Type)
}
@ -183,3 +183,18 @@ func (h *VMess) newPacketConnection(ctx context.Context, conn N.PacketConn, meta
}
return h.router.RoutePacketConnection(ctx, conn, metadata)
}
var _ adapter.V2RayServerTransportHandler = (*vmessTransportHandler)(nil)
type vmessTransportHandler VMess
func (t *vmessTransportHandler) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
return (*VMess)(t).newTransportConnection(ctx, conn, adapter.InboundContext{
Source: metadata.Source,
Destination: metadata.Destination,
})
}
func (t *vmessTransportHandler) FallbackConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
return os.ErrInvalid
}

3
include/quic_stub.go
View file

@ -11,7 +11,6 @@ import (
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-box/transport/v2ray"
"github.com/sagernet/sing-dns"
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"
@ -24,7 +23,7 @@ func init() {
return nil, C.ErrQUICNotIncluded
})
v2ray.RegisterQUICConstructor(
func(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error) {
func(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {
return nil, C.ErrQUICNotIncluded
},
func(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayQUICOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {

5
transport/v2ray/grpc.go
View file

@ -10,14 +10,13 @@ import (
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-box/transport/v2raygrpc"
"github.com/sagernet/sing-box/transport/v2raygrpclite"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
)
func NewGRPCServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error) {
func NewGRPCServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {
if options.ForceLite {
return v2raygrpclite.NewServer(ctx, options, tlsConfig, handler, errorHandler)
return v2raygrpclite.NewServer(ctx, options, tlsConfig, handler)
}
return v2raygrpc.NewServer(ctx, options, tlsConfig, handler)
}

5
transport/v2ray/grpc_lite.go
View file

@ -9,13 +9,12 @@ import (
"github.com/sagernet/sing-box/common/tls"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-box/transport/v2raygrpclite"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
)
func NewGRPCServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error) {
return v2raygrpclite.NewServer(ctx, options, tlsConfig, handler, errorHandler)
func NewGRPCServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {
return v2raygrpclite.NewServer(ctx, options, tlsConfig, handler)
}
func NewGRPCClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayGRPCOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {

5
transport/v2ray/quic.go
View file

@ -7,7 +7,6 @@ import (
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/tls"
"github.com/sagernet/sing-box/option"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
)
@ -22,11 +21,11 @@ func RegisterQUICConstructor(server ServerConstructor[option.V2RayQUICOptions],
quicClientConstructor = client
}
func NewQUICServer(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error) {
func NewQUICServer(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {
if quicServerConstructor == nil {
return nil, os.ErrInvalid
}
return quicServerConstructor(ctx, options, tlsConfig, handler, errorHandler)
return quicServerConstructor(ctx, options, tlsConfig, handler)
}
func NewQUICClient(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options option.V2RayQUICOptions, tlsConfig tls.Config) (adapter.V2RayClientTransport, error) {

12
transport/v2ray/transport.go
View file

@ -15,26 +15,26 @@ import (
)
type (
ServerConstructor[O any] func(ctx context.Context, options O, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error)
ServerConstructor[O any] func(ctx context.Context, options O, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error)
ClientConstructor[O any] func(ctx context.Context, dialer N.Dialer, serverAddr M.Socksaddr, options O, tlsConfig tls.Config) (adapter.V2RayClientTransport, error)
)
func NewServerTransport(ctx context.Context, options option.V2RayTransportOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error) {
func NewServerTransport(ctx context.Context, options option.V2RayTransportOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {
if options.Type == "" {
return nil, nil
}
switch options.Type {
case C.V2RayTransportTypeHTTP:
return v2rayhttp.NewServer(ctx, options.HTTPOptions, tlsConfig, handler, errorHandler)
return v2rayhttp.NewServer(ctx, options.HTTPOptions, tlsConfig, handler)
case C.V2RayTransportTypeWebsocket:
return v2raywebsocket.NewServer(ctx, options.WebsocketOptions, tlsConfig, handler, errorHandler)
return v2raywebsocket.NewServer(ctx, options.WebsocketOptions, tlsConfig, handler)
case C.V2RayTransportTypeQUIC:
if tlsConfig == nil {
return nil, C.ErrTLSRequired
}
return NewQUICServer(ctx, options.QUICOptions, tlsConfig, handler, errorHandler)
return NewQUICServer(ctx, options.QUICOptions, tlsConfig, handler)
case C.V2RayTransportTypeGRPC:
return NewGRPCServer(ctx, options.GRPCOptions, tlsConfig, handler, errorHandler)
return NewGRPCServer(ctx, options.GRPCOptions, tlsConfig, handler)
default:
return nil, E.New("unknown transport type: " + options.Type)
}

33
transport/v2raygrpclite/server.go
View file

@ -26,7 +26,7 @@ import (
var _ adapter.V2RayServerTransport = (*Server)(nil)
type Server struct {
handler N.TCPConnectionHandler
handler adapter.V2RayServerTransportHandler
errorHandler E.Handler
httpServer *http.Server
h2Server *http2.Server
@ -38,12 +38,11 @@ func (s *Server) Network() []string {
return []string{N.NetworkTCP}
}
func NewServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (*Server, error) {
func NewServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (*Server, error) {
server := &Server{
handler: handler,
errorHandler: errorHandler,
path: fmt.Sprintf("/%s/Tun", url.QueryEscape(options.ServiceName)),
h2Server: new(http2.Server),
handler: handler,
path: fmt.Sprintf("/%s/Tun", url.QueryEscape(options.ServiceName)),
h2Server: new(http2.Server),
}
server.httpServer = &http.Server{
Handler: server,
@ -68,19 +67,15 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
return
}
if request.URL.Path != s.path {
request.Write(os.Stdout)
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad path: ", request.URL.Path))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path))
return
}
if request.Method != http.MethodPost {
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad method: ", request.Method))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad method: ", request.Method))
return
}
if ct := request.Header.Get("Content-Type"); !strings.HasPrefix(ct, "application/grpc") {
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad content type: ", ct))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad content type: ", ct))
return
}
writer.Header().Set("Content-Type", "application/grpc")
@ -93,8 +88,16 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
conn.CloseWrapper()
}
func (s *Server) badRequest(request *http.Request, err error) {
s.errorHandler.NewError(request.Context(), E.Cause(err, "process connection from ", request.RemoteAddr))
func (s *Server) fallbackRequest(ctx context.Context, writer http.ResponseWriter, request *http.Request, statusCode int, err error) {
conn := v2rayhttp.NewHTTPConn(request.Body, writer)
fErr := s.handler.FallbackConnection(ctx, &conn, M.Metadata{})
if fErr == nil {
return
} else if fErr == os.ErrInvalid {
fErr = nil
}
writer.WriteHeader(statusCode)
s.handler.NewError(request.Context(), E.Cause(E.Errors(err, E.Cause(fErr, "fallback connection")), "process connection from ", request.RemoteAddr))
}
func (s *Server) Serve(listener net.Listener) error {

2
transport/v2rayhttp/conn.go
View file

@ -22,7 +22,7 @@ type HTTPConn struct {
err error
}
func newHTTPConn(reader io.Reader, writer io.Writer) HTTPConn {
func NewHTTPConn(reader io.Reader, writer io.Writer) HTTPConn {
return HTTPConn{
reader: reader,
writer: writer,

62
transport/v2rayhttp/server.go
View file

@ -24,32 +24,30 @@ import (
var _ adapter.V2RayServerTransport = (*Server)(nil)
type Server struct {
ctx context.Context
handler N.TCPConnectionHandler
errorHandler E.Handler
httpServer *http.Server
h2Server *http2.Server
h2cHandler http.Handler
host []string
path string
method string
headers http.Header
ctx context.Context
handler adapter.V2RayServerTransportHandler
httpServer *http.Server
h2Server *http2.Server
h2cHandler http.Handler
host []string
path string
method string
headers http.Header
}
func (s *Server) Network() []string {
return []string{N.NetworkTCP}
}
func NewServer(ctx context.Context, options option.V2RayHTTPOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (*Server, error) {
func NewServer(ctx context.Context, options option.V2RayHTTPOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (*Server, error) {
server := &Server{
ctx: ctx,
handler: handler,
errorHandler: errorHandler,
h2Server: new(http2.Server),
host: options.Host,
path: options.Path,
method: options.Method,
headers: make(http.Header),
ctx: ctx,
handler: handler,
h2Server: new(http2.Server),
host: options.Host,
path: options.Path,
method: options.Method,
headers: make(http.Header),
}
if server.method == "" {
server.method = "PUT"
@ -83,18 +81,15 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
}
host := request.Host
if len(s.host) > 0 && !common.Contains(s.host, host) {
writer.WriteHeader(http.StatusBadRequest)
s.badRequest(request, E.New("bad host: ", host))
s.fallbackRequest(request.Context(), writer, request, http.StatusBadRequest, E.New("bad host: ", host))
return
}
if !strings.HasPrefix(request.URL.Path, s.path) {
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad path: ", request.URL.Path))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path))
return
}
if request.Method != s.method {
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad method: ", request.Method))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad method: ", request.Method))
return
}
@ -114,14 +109,13 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
if h, ok := writer.(http.Hijacker); ok {
conn, _, err := h.Hijack()
if err != nil {
writer.WriteHeader(http.StatusInternalServerError)
s.badRequest(request, E.Cause(err, "hijack conn"))
s.fallbackRequest(request.Context(), writer, request, http.StatusInternalServerError, E.Cause(err, "hijack conn"))
return
}
s.handler.NewConnection(request.Context(), conn, metadata)
} else {
conn := NewHTTP2Wrapper(&ServerHTTPConn{
newHTTPConn(request.Body, writer),
NewHTTPConn(request.Body, writer),
writer.(http.Flusher),
})
s.handler.NewConnection(request.Context(), conn, metadata)
@ -129,8 +123,16 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
}
}
func (s *Server) badRequest(request *http.Request, err error) {
s.errorHandler.NewError(request.Context(), E.Cause(err, "process connection from ", request.RemoteAddr))
func (s *Server) fallbackRequest(ctx context.Context, writer http.ResponseWriter, request *http.Request, statusCode int, err error) {
conn := NewHTTPConn(request.Body, writer)
fErr := s.handler.FallbackConnection(ctx, &conn, M.Metadata{})
if fErr == nil {
return
} else if fErr == os.ErrInvalid {
fErr = nil
}
writer.WriteHeader(statusCode)
s.handler.NewError(request.Context(), E.Cause(E.Errors(err, E.Cause(fErr, "fallback connection")), "process connection from ", request.RemoteAddr))
}
func (s *Server) Serve(listener net.Listener) error {

13
transport/v2rayquic/server.go
View file

@ -23,13 +23,13 @@ type Server struct {
ctx context.Context
tlsConfig *tls.STDConfig
quicConfig *quic.Config
handler N.TCPConnectionHandler
handler adapter.V2RayServerTransportHandler
errorHandler E.Handler
udpListener net.PacketConn
quicListener quic.Listener
}
func NewServer(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (adapter.V2RayServerTransport, error) {
func NewServer(ctx context.Context, options option.V2RayQUICOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (adapter.V2RayServerTransport, error) {
quicConfig := &quic.Config{
DisablePathMTUDiscovery: !C.IsLinux && !C.IsWindows,
}
@ -41,11 +41,10 @@ func NewServer(ctx context.Context, options option.V2RayQUICOptions, tlsConfig t
stdConfig.NextProtos = []string{"h2", "http/1.1"}
}
server := &Server{
ctx: ctx,
tlsConfig: stdConfig,
quicConfig: quicConfig,
handler: handler,
errorHandler: errorHandler,
ctx: ctx,
tlsConfig: stdConfig,
quicConfig: quicConfig,
handler: handler,
}
return server, nil
}

30
transport/v2raywebsocket/server.go
View file

@ -12,6 +12,7 @@ import (
"github.com/sagernet/sing-box/common/tls"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-box/transport/v2rayhttp"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/buf"
"github.com/sagernet/sing/common/bufio"
@ -26,19 +27,17 @@ var _ adapter.V2RayServerTransport = (*Server)(nil)
type Server struct {
ctx context.Context
handler N.TCPConnectionHandler
errorHandler E.Handler
handler adapter.V2RayServerTransportHandler
httpServer *http.Server
path string
maxEarlyData uint32
earlyDataHeaderName string
}
func NewServer(ctx context.Context, options option.V2RayWebsocketOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (*Server, error) {
func NewServer(ctx context.Context, options option.V2RayWebsocketOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (*Server, error) {
server := &Server{
ctx: ctx,
handler: handler,
errorHandler: errorHandler,
path: options.Path,
maxEarlyData: options.MaxEarlyData,
earlyDataHeaderName: options.EarlyDataHeaderName,
@ -71,8 +70,7 @@ var upgrader = websocket.Upgrader{
func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
if s.maxEarlyData == 0 || s.earlyDataHeaderName != "" {
if request.URL.Path != s.path {
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad path: ", request.URL.Path))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path))
return
}
}
@ -86,8 +84,7 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
earlyDataStr := request.URL.RequestURI()[len(s.path):]
earlyData, err = base64.RawURLEncoding.DecodeString(earlyDataStr)
} else {
writer.WriteHeader(http.StatusNotFound)
s.badRequest(request, E.New("bad path: ", request.URL.Path))
s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path))
return
}
} else {
@ -97,13 +94,12 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
}
}
if err != nil {
writer.WriteHeader(http.StatusBadRequest)
s.badRequest(request, E.Cause(err, "decode early data"))
s.fallbackRequest(request.Context(), writer, request, http.StatusBadRequest, E.Cause(err, "decode early data"))
return
}
wsConn, err := upgrader.Upgrade(writer, request, nil)
if err != nil {
s.badRequest(request, E.Cause(err, "upgrade websocket connection"))
s.fallbackRequest(request.Context(), writer, request, http.StatusBadRequest, E.Cause(err, "upgrade websocket connection"))
return
}
var metadata M.Metadata
@ -115,8 +111,16 @@ func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
s.handler.NewConnection(request.Context(), conn, metadata)
}
func (s *Server) badRequest(request *http.Request, err error) {
s.errorHandler.NewError(request.Context(), E.Cause(err, "process connection from ", request.RemoteAddr))
func (s *Server) fallbackRequest(ctx context.Context, writer http.ResponseWriter, request *http.Request, statusCode int, err error) {
conn := v2rayhttp.NewHTTPConn(request.Body, writer)
fErr := s.handler.FallbackConnection(ctx, &conn, M.Metadata{})
if fErr == nil {
return
} else if fErr == os.ErrInvalid {
fErr = nil
}
writer.WriteHeader(statusCode)
s.handler.NewError(request.Context(), E.Cause(E.Errors(err, E.Cause(fErr, "fallback connection")), "process connection from ", request.RemoteAddr))
}
func (s *Server) Network() []string {