sing-box/inbound/vmess.go

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package inbound
import (
"context"
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"crypto/tls"
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"net"
"os"
"github.com/sagernet/sing-box/adapter"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-vmess"
"github.com/sagernet/sing/common"
"github.com/sagernet/sing/common/auth"
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E "github.com/sagernet/sing/common/exceptions"
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F "github.com/sagernet/sing/common/format"
N "github.com/sagernet/sing/common/network"
)
var _ adapter.Inbound = (*VMess)(nil)
type VMess struct {
myInboundAdapter
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service *vmess.Service[int]
users []option.VMessUser
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tlsConfig *TLSConfig
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}
func NewVMess(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VMessInboundOptions) (*VMess, error) {
inbound := &VMess{
myInboundAdapter: myInboundAdapter{
protocol: C.TypeVMess,
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network: []string{N.NetworkTCP},
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ctx: ctx,
router: router,
logger: logger,
tag: tag,
listenOptions: options.ListenOptions,
},
users: options.Users,
}
service := vmess.NewService[int](adapter.NewUpstreamContextHandler(inbound.newConnection, inbound.newPacketConnection, inbound))
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err := service.UpdateUsers(common.MapIndexed(options.Users, func(index int, it option.VMessUser) int {
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return index
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}), common.Map(options.Users, func(it option.VMessUser) string {
return it.UUID
}), common.Map(options.Users, func(it option.VMessUser) int {
return it.AlterId
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}))
if err != nil {
return nil, err
}
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if options.TLS != nil {
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tlsConfig, err := NewTLSConfig(logger, common.PtrValueOrDefault(options.TLS))
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if err != nil {
return nil, err
}
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inbound.tlsConfig = tlsConfig
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}
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inbound.service = service
inbound.connHandler = inbound
return inbound, nil
}
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func (h *VMess) Start() error {
if h.tlsConfig != nil {
err := h.tlsConfig.Start()
if err != nil {
return E.Cause(err, "create TLS config")
}
}
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return common.Start(
h.service,
&h.myInboundAdapter,
)
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}
func (h *VMess) Close() error {
return common.Close(
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h.service,
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&h.myInboundAdapter,
common.PtrOrNil(h.tlsConfig),
)
}
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func (h *VMess) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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if h.tlsConfig != nil {
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conn = tls.Server(conn, h.tlsConfig.Config())
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}
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return h.service.NewConnection(adapter.WithContext(log.ContextWithNewID(ctx), &metadata), conn, adapter.UpstreamMetadata(metadata))
}
func (h *VMess) newConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
userIndex, loaded := auth.UserFromContext[int](ctx)
if !loaded {
return os.ErrInvalid
}
user := h.users[userIndex].Name
if user == "" {
user = F.ToString(userIndex)
} else {
metadata.User = user
}
h.logger.InfoContext(ctx, "[", user, "] inbound connection to ", metadata.Destination)
return h.router.RouteConnection(ctx, conn, metadata)
}
func (h *VMess) newPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
userIndex, loaded := auth.UserFromContext[int](ctx)
if !loaded {
return os.ErrInvalid
}
user := h.users[userIndex].Name
if user == "" {
user = F.ToString(userIndex)
} else {
metadata.User = user
}
h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
return h.router.RoutePacketConnection(ctx, conn, metadata)
}