Xray-core/proxy/shadowsocks_2022/inbound_multi.go

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package shadowsocks_2022
import (
"context"
"encoding/base64"
"strconv"
"strings"
"sync"
"github.com/sagernet/sing-shadowsocks/shadowaead_2022"
C "github.com/sagernet/sing/common"
A "github.com/sagernet/sing/common/auth"
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"
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"github.com/xtls/xray-core/common/singbridge"
"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 {
sync.Mutex
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)
}
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service, err := shadowaead_2022.NewMultiService[int](config.Method, psk, 500, inbound, nil)
if err != nil {
return nil, newError("create service").Base(err)
}
for i, user := range config.Users {
if user.Email == "" {
u := uuid.New()
user.Email = "unnamed-user-" + strconv.Itoa(i) + "-" + u.String()
}
}
err = service.UpdateUsersWithPasswords(
C.MapIndexed(config.Users, func(index int, it *User) int { return index }),
C.Map(config.Users, func(it *User) string { return it.Key }),
)
if err != nil {
return nil, newError("create service").Base(err)
}
inbound.service = service
return inbound, nil
}
// AddUser implements proxy.UserManager.AddUser().
func (i *MultiUserInbound) AddUser(ctx context.Context, u *protocol.MemoryUser) error {
i.Lock()
defer i.Unlock()
account := u.Account.(*MemoryAccount)
if account.Email != "" {
for idx := range i.users {
if i.users[idx].Email == account.Email {
return newError("User ", account.Email, " already exists.")
}
}
}
i.users = append(i.users, &User{
Key: account.Key,
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Email: account.Email,
Level: account.Level,
})
// sync to multi service
// Considering implements shadowsocks2022 in xray-core may have better performance.
i.service.UpdateUsersWithPasswords(
C.MapIndexed(i.users, func(index int, it *User) int { return index }),
C.Map(i.users, func(it *User) string { return it.Key }),
)
return nil
}
// RemoveUser implements proxy.UserManager.RemoveUser().
func (i *MultiUserInbound) RemoveUser(ctx context.Context, email string) error {
if email == "" {
return newError("Email must not be empty.")
}
i.Lock()
defer i.Unlock()
idx := -1
for ii, u := range i.users {
if strings.EqualFold(u.Email, email) {
idx = ii
break
}
}
if idx == -1 {
return newError("User ", email, " not found.")
}
ulen := len(i.users)
i.users[idx] = i.users[ulen-1]
i.users[ulen-1] = nil
i.users = i.users[:ulen-1]
// sync to multi service
// Considering implements shadowsocks2022 in xray-core may have better performance.
i.service.UpdateUsersWithPasswords(
C.MapIndexed(i.users, func(index int, it *User) int { return index }),
C.Map(i.users, func(it *User) string { return it.Key }),
)
return 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)
inbound.Name = "shadowsocks-2022-multi"
inbound.SetCanSpliceCopy(3)
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 {
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return singbridge.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)
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return singbridge.ReturnError(err)
}
for _, buffer := range mb {
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packet := B.As(buffer.Bytes()).ToOwned()
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buffer.Release()
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err = i.service.NewPacket(ctx, pc, packet, metadata)
if err != nil {
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packet.Release()
buf.ReleaseMulti(mb)
return err
}
}
}
}
}
func (i *MultiUserInbound) NewConnection(ctx context.Context, conn net.Conn, metadata M.Metadata) error {
inbound := session.InboundFromContext(ctx)
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userInt, _ := A.UserFromContext[int](ctx)
user := i.users[userInt]
inbound.User = &protocol.MemoryUser{
Email: user.Email,
Level: uint32(user.Level),
}
ctx = log.ContextWithAccessMessage(ctx, &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)
destination := singbridge.ToDestination(metadata.Destination, net.Network_TCP)
if !destination.IsValid() {
return newError("invalid destination")
}
link, err := dispatcher.Dispatch(ctx, destination)
if err != nil {
return err
}
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return singbridge.CopyConn(ctx, conn, link, conn)
}
func (i *MultiUserInbound) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata M.Metadata) error {
inbound := session.InboundFromContext(ctx)
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userInt, _ := A.UserFromContext[int](ctx)
user := i.users[userInt]
inbound.User = &protocol.MemoryUser{
Email: user.Email,
Level: uint32(user.Level),
}
ctx = log.ContextWithAccessMessage(ctx, &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)
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destination := singbridge.ToDestination(metadata.Destination, net.Network_UDP)
link, err := dispatcher.Dispatch(ctx, destination)
if err != nil {
return err
}
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outConn := &singbridge.PacketConnWrapper{
Reader: link.Reader,
Writer: link.Writer,
Dest: destination,
}
return bufio.CopyPacketConn(ctx, conn, outConn)
}
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func (i *MultiUserInbound) NewError(ctx context.Context, err error) {
if E.IsClosed(err) {
return
}
newError(err).AtWarning().WriteToLog()
}