Xray-core/proxy/shadowsocks_2022/inbound_multi.go

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2022-05-31 10:55:38 +03:00
//go:build go1.18
package shadowsocks_2022
import (
"context"
"encoding/base64"
"github.com/sagernet/sing-shadowsocks"
"github.com/sagernet/sing-shadowsocks/shadowaead_2022"
B "github.com/sagernet/sing/common/buf"
"github.com/sagernet/sing/common/bufio"
E "github.com/sagernet/sing/common/exceptions"
M "github.com/sagernet/sing/common/metadata"
N "github.com/sagernet/sing/common/network"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/buf"
"github.com/xtls/xray-core/common/log"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/protocol"
"github.com/xtls/xray-core/common/session"
"github.com/xtls/xray-core/common/uuid"
"github.com/xtls/xray-core/features/routing"
"github.com/xtls/xray-core/transport/internet/stat"
)
func init() {
common.Must(common.RegisterConfig((*MultiUserServerConfig)(nil), func(ctx context.Context, config interface{}) (interface{}, error) {
return NewMultiServer(ctx, config.(*MultiUserServerConfig))
}))
}
type MultiUserInbound struct {
networks []net.Network
users []*User
service *shadowaead_2022.MultiService[int]
}
func NewMultiServer(ctx context.Context, config *MultiUserServerConfig) (*MultiUserInbound, error) {
networks := config.Network
if len(networks) == 0 {
networks = []net.Network{
net.Network_TCP,
net.Network_UDP,
}
}
inbound := &MultiUserInbound{
networks: networks,
users: config.Users,
}
if config.Key == "" {
return nil, newError("missing key")
}
psk, err := base64.StdEncoding.DecodeString(config.Key)
if err != nil {
return nil, newError("parse config").Base(err)
}
service, err := shadowaead_2022.NewMultiService[int](config.Method, psk, 500, inbound)
if err != nil {
return nil, newError("create service").Base(err)
}
for i, user := range config.Users {
if user.Email == "" {
u := uuid.New()
user.Email = "(user with empty email - " + u.String() + ")"
}
uPSK, err := base64.StdEncoding.DecodeString(user.Key)
if err != nil {
return nil, newError("parse user key for ", user.Email).Base(err)
}
err = service.AddUser(i, uPSK)
if err != nil {
return nil, newError("add user").Base(err)
}
}
inbound.service = service
return inbound, nil
}
func (i *MultiUserInbound) Network() []net.Network {
return i.networks
}
func (i *MultiUserInbound) Process(ctx context.Context, network net.Network, connection stat.Connection, dispatcher routing.Dispatcher) error {
inbound := session.InboundFromContext(ctx)
var metadata M.Metadata
if inbound.Source.IsValid() {
metadata.Source = M.ParseSocksaddr(inbound.Source.NetAddr())
}
ctx = session.ContextWithDispatcher(ctx, dispatcher)
if network == net.Network_TCP {
return returnError(i.service.NewConnection(ctx, connection, metadata))
} else {
reader := buf.NewReader(connection)
pc := &natPacketConn{connection}
for {
mb, err := reader.ReadMultiBuffer()
if err != nil {
buf.ReleaseMulti(mb)
return returnError(err)
}
for _, buffer := range mb {
err = i.service.NewPacket(ctx, pc, B.As(buffer.Bytes()).ToOwned(), metadata)
if err != nil {
buf.ReleaseMulti(mb)
return err
}
buffer.Release()
}
}
}
}
func (i *MultiUserInbound) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
userCtx := ctx.(*shadowsocks.UserContext[int])
inbound := session.InboundFromContext(ctx)
user := i.users[userCtx.User]
inbound.User = &protocol.MemoryUser{
Email: user.Email,
Level: uint32(user.Level),
}
ctx = log.ContextWithAccessMessage(userCtx.Context, &log.AccessMessage{
From: metadata.Source,
To: metadata.Destination,
Status: log.AccessAccepted,
Email: user.Email,
})
newError("tunnelling request to tcp:", metadata.Destination).WriteToLog(session.ExportIDToError(ctx))
dispatcher := session.DispatcherFromContext(ctx)
link, err := dispatcher.Dispatch(ctx, toDestination(metadata.Destination, net.Network_TCP))
if err != nil {
return err
}
outConn := &pipeConnWrapper{
&buf.BufferedReader{Reader: link.Reader},
link.Writer,
conn,
}
return bufio.CopyConn(ctx, conn, outConn)
}
func (i *MultiUserInbound) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
userCtx := ctx.(*shadowsocks.UserContext[int])
inbound := session.InboundFromContext(ctx)
user := i.users[userCtx.User]
inbound.User = &protocol.MemoryUser{
Email: user.Email,
Level: uint32(user.Level),
}
ctx = log.ContextWithAccessMessage(userCtx.Context, &log.AccessMessage{
From: metadata.Source,
To: metadata.Destination,
Status: log.AccessAccepted,
Email: user.Email,
})
newError("tunnelling request to udp:", metadata.Destination).WriteToLog(session.ExportIDToError(ctx))
dispatcher := session.DispatcherFromContext(ctx)
destination := toDestination(metadata.Destination, net.Network_UDP)
link, err := dispatcher.Dispatch(ctx, destination)
if err != nil {
return err
}
outConn := &packetConnWrapper{
Reader: link.Reader,
Writer: link.Writer,
Dest: destination,
}
return bufio.CopyPacketConn(ctx, conn, outConn)
}
func (i *MultiUserInbound) HandleError(err error) {
if E.IsClosed(err) {
return
}
newError(err).AtWarning().WriteToLog()
}