mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-10-31 00:08:08 -04:00
435 lines
13 KiB
Go
435 lines
13 KiB
Go
// +build !confonly
|
|
|
|
package inbound
|
|
|
|
//go:generate go run v2ray.com/core/common/errors/errorgen
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"strconv"
|
|
"time"
|
|
|
|
"v2ray.com/core"
|
|
"v2ray.com/core/common"
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/errors"
|
|
"v2ray.com/core/common/log"
|
|
"v2ray.com/core/common/net"
|
|
"v2ray.com/core/common/protocol"
|
|
"v2ray.com/core/common/retry"
|
|
"v2ray.com/core/common/session"
|
|
"v2ray.com/core/common/signal"
|
|
"v2ray.com/core/common/task"
|
|
"v2ray.com/core/features/dns"
|
|
feature_inbound "v2ray.com/core/features/inbound"
|
|
"v2ray.com/core/features/policy"
|
|
"v2ray.com/core/features/routing"
|
|
"v2ray.com/core/proxy/vless"
|
|
"v2ray.com/core/proxy/vless/encoding"
|
|
"v2ray.com/core/transport/internet"
|
|
"v2ray.com/core/transport/internet/tls"
|
|
)
|
|
|
|
func init() {
|
|
common.Must(common.RegisterConfig((*Config)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
|
|
var dc dns.Client
|
|
if err := core.RequireFeatures(ctx, func(d dns.Client) error {
|
|
dc = d
|
|
return nil
|
|
}); err != nil {
|
|
return nil, err
|
|
}
|
|
return New(ctx, config.(*Config), dc)
|
|
}))
|
|
}
|
|
|
|
// Handler is an inbound connection handler that handles messages in VLess protocol.
|
|
type Handler struct {
|
|
inboundHandlerManager feature_inbound.Manager
|
|
policyManager policy.Manager
|
|
validator *vless.Validator
|
|
dns dns.Client
|
|
fallbacks map[string]map[string]*Fallback // or nil
|
|
// regexps map[string]*regexp.Regexp // or nil
|
|
}
|
|
|
|
// New creates a new VLess inbound handler.
|
|
func New(ctx context.Context, config *Config, dc dns.Client) (*Handler, error) {
|
|
v := core.MustFromContext(ctx)
|
|
handler := &Handler{
|
|
inboundHandlerManager: v.GetFeature(feature_inbound.ManagerType()).(feature_inbound.Manager),
|
|
policyManager: v.GetFeature(policy.ManagerType()).(policy.Manager),
|
|
validator: new(vless.Validator),
|
|
dns: dc,
|
|
}
|
|
|
|
for _, user := range config.Clients {
|
|
u, err := user.ToMemoryUser()
|
|
if err != nil {
|
|
return nil, newError("failed to get VLESS user").Base(err).AtError()
|
|
}
|
|
if err := handler.AddUser(ctx, u); err != nil {
|
|
return nil, newError("failed to initiate user").Base(err).AtError()
|
|
}
|
|
}
|
|
|
|
if config.Fallbacks != nil {
|
|
handler.fallbacks = make(map[string]map[string]*Fallback)
|
|
// handler.regexps = make(map[string]*regexp.Regexp)
|
|
for _, fb := range config.Fallbacks {
|
|
if handler.fallbacks[fb.Alpn] == nil {
|
|
handler.fallbacks[fb.Alpn] = make(map[string]*Fallback)
|
|
}
|
|
handler.fallbacks[fb.Alpn][fb.Path] = fb
|
|
/*
|
|
if fb.Path != "" {
|
|
if r, err := regexp.Compile(fb.Path); err != nil {
|
|
return nil, newError("invalid path regexp").Base(err).AtError()
|
|
} else {
|
|
handler.regexps[fb.Path] = r
|
|
}
|
|
}
|
|
*/
|
|
}
|
|
if handler.fallbacks[""] != nil {
|
|
for alpn, pfb := range handler.fallbacks {
|
|
if alpn != "" { // && alpn != "h2" {
|
|
for path, fb := range handler.fallbacks[""] {
|
|
if pfb[path] == nil {
|
|
pfb[path] = fb
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return handler, nil
|
|
}
|
|
|
|
// Close implements common.Closable.Close().
|
|
func (h *Handler) Close() error {
|
|
return errors.Combine(common.Close(h.validator))
|
|
}
|
|
|
|
// AddUser implements proxy.UserManager.AddUser().
|
|
func (h *Handler) AddUser(ctx context.Context, u *protocol.MemoryUser) error {
|
|
return h.validator.Add(u)
|
|
}
|
|
|
|
// RemoveUser implements proxy.UserManager.RemoveUser().
|
|
func (h *Handler) RemoveUser(ctx context.Context, e string) error {
|
|
return h.validator.Del(e)
|
|
}
|
|
|
|
// Network implements proxy.Inbound.Network().
|
|
func (*Handler) Network() []net.Network {
|
|
return []net.Network{net.Network_TCP, net.Network_UNIX}
|
|
}
|
|
|
|
// Process implements proxy.Inbound.Process().
|
|
func (h *Handler) Process(ctx context.Context, network net.Network, connection internet.Connection, dispatcher routing.Dispatcher) error {
|
|
sid := session.ExportIDToError(ctx)
|
|
|
|
iConn := connection
|
|
statConn, ok := iConn.(*internet.StatCouterConnection)
|
|
if ok {
|
|
iConn = statConn.Connection
|
|
}
|
|
|
|
sessionPolicy := h.policyManager.ForLevel(0)
|
|
if err := connection.SetReadDeadline(time.Now().Add(sessionPolicy.Timeouts.Handshake)); err != nil {
|
|
return newError("unable to set read deadline").Base(err).AtWarning()
|
|
}
|
|
|
|
first := buf.New()
|
|
defer first.Release()
|
|
|
|
firstLen, _ := first.ReadFrom(connection)
|
|
newError("firstLen = ", firstLen).AtInfo().WriteToLog(sid)
|
|
|
|
reader := &buf.BufferedReader{
|
|
Reader: buf.NewReader(connection),
|
|
Buffer: buf.MultiBuffer{first},
|
|
}
|
|
|
|
var request *protocol.RequestHeader
|
|
var requestAddons *encoding.Addons
|
|
var err error
|
|
|
|
apfb := h.fallbacks
|
|
isfb := apfb != nil
|
|
|
|
if isfb && firstLen < 18 {
|
|
err = newError("fallback directly")
|
|
} else {
|
|
request, requestAddons, isfb, err = encoding.DecodeRequestHeader(isfb, first, reader, h.validator)
|
|
}
|
|
|
|
if err != nil {
|
|
if isfb {
|
|
if err := connection.SetReadDeadline(time.Time{}); err != nil {
|
|
newError("unable to set back read deadline").Base(err).AtWarning().WriteToLog(sid)
|
|
}
|
|
newError("fallback starts").Base(err).AtInfo().WriteToLog(sid)
|
|
|
|
alpn := ""
|
|
if len(apfb) > 1 || apfb[""] == nil {
|
|
if tlsConn, ok := iConn.(*tls.Conn); ok {
|
|
alpn = tlsConn.ConnectionState().NegotiatedProtocol
|
|
newError("realAlpn = " + alpn).AtInfo().WriteToLog(sid)
|
|
}
|
|
if apfb[alpn] == nil {
|
|
alpn = ""
|
|
}
|
|
}
|
|
pfb := apfb[alpn]
|
|
if pfb == nil {
|
|
return newError(`failed to find the default "alpn" config`).AtWarning()
|
|
}
|
|
|
|
path := ""
|
|
if len(pfb) > 1 || pfb[""] == nil {
|
|
/*
|
|
if lines := bytes.Split(firstBytes, []byte{'\r', '\n'}); len(lines) > 1 {
|
|
if s := bytes.Split(lines[0], []byte{' '}); len(s) == 3 {
|
|
if len(s[0]) < 8 && len(s[1]) > 0 && len(s[2]) == 8 {
|
|
newError("realPath = " + string(s[1])).AtInfo().WriteToLog(sid)
|
|
for _, fb := range pfb {
|
|
if fb.Path != "" && h.regexps[fb.Path].Match(s[1]) {
|
|
path = fb.Path
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
*/
|
|
if firstLen >= 18 && first.Byte(4) != '*' { // not h2c
|
|
firstBytes := first.Bytes()
|
|
for i := 4; i <= 8; i++ { // 5 -> 9
|
|
if firstBytes[i] == '/' && firstBytes[i-1] == ' ' {
|
|
search := len(firstBytes)
|
|
if search > 64 {
|
|
search = 64 // up to about 60
|
|
}
|
|
for j := i + 1; j < search; j++ {
|
|
k := firstBytes[j]
|
|
if k == '\r' || k == '\n' { // avoid logging \r or \n
|
|
break
|
|
}
|
|
if k == ' ' {
|
|
path = string(firstBytes[i:j])
|
|
newError("realPath = " + path).AtInfo().WriteToLog(sid)
|
|
if pfb[path] == nil {
|
|
path = ""
|
|
}
|
|
break
|
|
}
|
|
}
|
|
break
|
|
}
|
|
}
|
|
}
|
|
}
|
|
fb := pfb[path]
|
|
if fb == nil {
|
|
return newError(`failed to find the default "path" config`).AtWarning()
|
|
}
|
|
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
|
|
ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
|
|
|
|
var conn net.Conn
|
|
if err := retry.ExponentialBackoff(5, 100).On(func() error {
|
|
var dialer net.Dialer
|
|
conn, err = dialer.DialContext(ctx, fb.Type, fb.Dest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}); err != nil {
|
|
return newError("failed to dial to " + fb.Dest).Base(err).AtWarning()
|
|
}
|
|
defer conn.Close()
|
|
|
|
serverReader := buf.NewReader(conn)
|
|
serverWriter := buf.NewWriter(conn)
|
|
|
|
postRequest := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
|
|
if fb.Xver != 0 {
|
|
remoteAddr, remotePort, err := net.SplitHostPort(connection.RemoteAddr().String())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
localAddr, localPort, err := net.SplitHostPort(connection.LocalAddr().String())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ipv4 := true
|
|
for i := 0; i < len(remoteAddr); i++ {
|
|
if remoteAddr[i] == ':' {
|
|
ipv4 = false
|
|
break
|
|
}
|
|
}
|
|
pro := buf.New()
|
|
defer pro.Release()
|
|
switch fb.Xver {
|
|
case 1:
|
|
if ipv4 {
|
|
pro.Write([]byte("PROXY TCP4 " + remoteAddr + " " + localAddr + " " + remotePort + " " + localPort + "\r\n"))
|
|
} else {
|
|
pro.Write([]byte("PROXY TCP6 " + remoteAddr + " " + localAddr + " " + remotePort + " " + localPort + "\r\n"))
|
|
}
|
|
|
|
case 2:
|
|
pro.Write([]byte("\x0D\x0A\x0D\x0A\x00\x0D\x0A\x51\x55\x49\x54\x0A\x21")) // signature + v2 + PROXY
|
|
if ipv4 {
|
|
pro.Write([]byte("\x11\x00\x0C")) // AF_INET + STREAM + 12 bytes
|
|
pro.Write(net.ParseIP(remoteAddr).To4())
|
|
pro.Write(net.ParseIP(localAddr).To4())
|
|
} else {
|
|
pro.Write([]byte("\x21\x00\x24")) // AF_INET6 + STREAM + 36 bytes
|
|
pro.Write(net.ParseIP(remoteAddr).To16())
|
|
pro.Write(net.ParseIP(localAddr).To16())
|
|
}
|
|
p1, _ := strconv.ParseUint(remotePort, 10, 16)
|
|
p2, _ := strconv.ParseUint(localPort, 10, 16)
|
|
pro.Write([]byte{byte(p1 >> 8), byte(p1), byte(p2 >> 8), byte(p2)})
|
|
}
|
|
if err := serverWriter.WriteMultiBuffer(buf.MultiBuffer{pro}); err != nil {
|
|
return newError("failed to set PROXY protocol v", fb.Xver).Base(err).AtWarning()
|
|
}
|
|
}
|
|
if err := buf.Copy(reader, serverWriter, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to fallback request payload").Base(err).AtInfo()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
writer := buf.NewWriter(connection)
|
|
|
|
getResponse := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
|
|
if err := buf.Copy(serverReader, writer, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to deliver response payload").Base(err).AtInfo()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
if err := task.Run(ctx, task.OnSuccess(postRequest, task.Close(serverWriter)), task.OnSuccess(getResponse, task.Close(writer))); err != nil {
|
|
common.Interrupt(serverReader)
|
|
common.Interrupt(serverWriter)
|
|
return newError("fallback ends").Base(err).AtInfo()
|
|
}
|
|
return nil
|
|
}
|
|
|
|
if errors.Cause(err) != io.EOF {
|
|
log.Record(&log.AccessMessage{
|
|
From: connection.RemoteAddr(),
|
|
To: "",
|
|
Status: log.AccessRejected,
|
|
Reason: err,
|
|
})
|
|
err = newError("invalid request from ", connection.RemoteAddr()).Base(err).AtInfo()
|
|
}
|
|
return err
|
|
}
|
|
|
|
if err := connection.SetReadDeadline(time.Time{}); err != nil {
|
|
newError("unable to set back read deadline").Base(err).AtWarning().WriteToLog(sid)
|
|
}
|
|
newError("received request for ", request.Destination()).AtInfo().WriteToLog(sid)
|
|
|
|
inbound := session.InboundFromContext(ctx)
|
|
if inbound == nil {
|
|
panic("no inbound metadata")
|
|
}
|
|
inbound.User = request.User
|
|
|
|
responseAddons := &encoding.Addons{}
|
|
|
|
if request.Command != protocol.RequestCommandMux {
|
|
ctx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
|
|
From: connection.RemoteAddr(),
|
|
To: request.Destination(),
|
|
Status: log.AccessAccepted,
|
|
Reason: "",
|
|
Email: request.User.Email,
|
|
})
|
|
}
|
|
|
|
sessionPolicy = h.policyManager.ForLevel(request.User.Level)
|
|
ctx, cancel := context.WithCancel(ctx)
|
|
timer := signal.CancelAfterInactivity(ctx, cancel, sessionPolicy.Timeouts.ConnectionIdle)
|
|
ctx = policy.ContextWithBufferPolicy(ctx, sessionPolicy.Buffer)
|
|
|
|
link, err := dispatcher.Dispatch(ctx, request.Destination())
|
|
if err != nil {
|
|
return newError("failed to dispatch request to ", request.Destination()).Base(err).AtWarning()
|
|
}
|
|
|
|
serverReader := link.Reader // .(*pipe.Reader)
|
|
serverWriter := link.Writer // .(*pipe.Writer)
|
|
|
|
postRequest := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.DownlinkOnly)
|
|
|
|
// default: clientReader := reader
|
|
clientReader := encoding.DecodeBodyAddons(reader, request, requestAddons)
|
|
|
|
// from clientReader.ReadMultiBuffer to serverWriter.WriteMultiBufer
|
|
if err := buf.Copy(clientReader, serverWriter, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transfer request payload").Base(err).AtInfo()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
getResponse := func() error {
|
|
defer timer.SetTimeout(sessionPolicy.Timeouts.UplinkOnly)
|
|
|
|
bufferWriter := buf.NewBufferedWriter(buf.NewWriter(connection))
|
|
if err := encoding.EncodeResponseHeader(bufferWriter, request, responseAddons); err != nil {
|
|
return newError("failed to encode response header").Base(err).AtWarning()
|
|
}
|
|
|
|
// default: clientWriter := bufferWriter
|
|
clientWriter := encoding.EncodeBodyAddons(bufferWriter, request, responseAddons)
|
|
{
|
|
multiBuffer, err := serverReader.ReadMultiBuffer()
|
|
if err != nil {
|
|
return err // ...
|
|
}
|
|
if err := clientWriter.WriteMultiBuffer(multiBuffer); err != nil {
|
|
return err // ...
|
|
}
|
|
}
|
|
|
|
// Flush; bufferWriter.WriteMultiBufer now is bufferWriter.writer.WriteMultiBuffer
|
|
if err := bufferWriter.SetBuffered(false); err != nil {
|
|
return newError("failed to write A response payload").Base(err).AtWarning()
|
|
}
|
|
|
|
// from serverReader.ReadMultiBuffer to clientWriter.WriteMultiBufer
|
|
if err := buf.Copy(serverReader, clientWriter, buf.UpdateActivity(timer)); err != nil {
|
|
return newError("failed to transfer response payload").Base(err).AtInfo()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
if err := task.Run(ctx, task.OnSuccess(postRequest, task.Close(serverWriter)), getResponse); err != nil {
|
|
common.Interrupt(serverReader)
|
|
common.Interrupt(serverWriter)
|
|
return newError("connection ends").Base(err).AtInfo()
|
|
}
|
|
|
|
return nil
|
|
}
|