sing-box/protocol/vmess/outbound.go
2024-11-28 14:29:42 +08:00

206 lines
6.5 KiB
Go

package vmess
import (
"context"
"net"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/adapter/outbound"
"github.com/sagernet/sing-box/common/dialer"
"github.com/sagernet/sing-box/common/mux"
"github.com/sagernet/sing-box/common/tls"
C "github.com/sagernet/sing-box/constant"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
"github.com/sagernet/sing-box/transport/v2ray"
"github.com/sagernet/sing-vmess"
"github.com/sagernet/sing-vmess/packetaddr"
"github.com/sagernet/sing/common"
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"
"github.com/sagernet/sing/common/ntp"
)
func RegisterOutbound(registry *outbound.Registry) {
outbound.Register[option.VMessOutboundOptions](registry, C.TypeVMess, NewOutbound)
}
type Outbound struct {
outbound.Adapter
logger logger.ContextLogger
dialer N.Dialer
client *vmess.Client
serverAddr M.Socksaddr
multiplexDialer *mux.Client
tlsConfig tls.Config
transport adapter.V2RayClientTransport
packetAddr bool
xudp bool
}
func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.VMessOutboundOptions) (adapter.Outbound, error) {
outboundDialer, err := dialer.New(router, options.DialerOptions)
if err != nil {
return nil, err
}
outbound := &Outbound{
Adapter: outbound.NewAdapterWithDialerOptions(C.TypeVMess, options.Network.Build(), tag, options.DialerOptions),
logger: logger,
dialer: outboundDialer,
serverAddr: options.ServerOptions.Build(),
}
if options.TLS != nil {
outbound.tlsConfig, err = tls.NewClient(ctx, options.Server, common.PtrValueOrDefault(options.TLS))
if err != nil {
return nil, err
}
}
if options.Transport != nil {
outbound.transport, err = v2ray.NewClientTransport(ctx, outbound.dialer, outbound.serverAddr, common.PtrValueOrDefault(options.Transport), outbound.tlsConfig)
if err != nil {
return nil, E.Cause(err, "create client transport: ", options.Transport.Type)
}
}
outbound.multiplexDialer, err = mux.NewClientWithOptions((*vmessDialer)(outbound), logger, common.PtrValueOrDefault(options.Multiplex))
if err != nil {
return nil, err
}
switch options.PacketEncoding {
case "":
case "packetaddr":
outbound.packetAddr = true
case "xudp":
outbound.xudp = true
default:
return nil, E.New("unknown packet encoding: ", options.PacketEncoding)
}
var clientOptions []vmess.ClientOption
if timeFunc := ntp.TimeFuncFromContext(ctx); timeFunc != nil {
clientOptions = append(clientOptions, vmess.ClientWithTimeFunc(timeFunc))
}
if options.GlobalPadding {
clientOptions = append(clientOptions, vmess.ClientWithGlobalPadding())
}
if options.AuthenticatedLength {
clientOptions = append(clientOptions, vmess.ClientWithAuthenticatedLength())
}
security := options.Security
if security == "" {
security = "auto"
}
if security == "auto" && outbound.tlsConfig != nil {
security = "zero"
}
client, err := vmess.NewClient(options.UUID, security, options.AlterId, clientOptions...)
if err != nil {
return nil, err
}
outbound.client = client
return outbound, nil
}
func (h *Outbound) InterfaceUpdated() {
if h.transport != nil {
h.transport.Close()
}
if h.multiplexDialer != nil {
h.multiplexDialer.Reset()
}
return
}
func (h *Outbound) Close() error {
return common.Close(common.PtrOrNil(h.multiplexDialer), h.transport)
}
func (h *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
if h.multiplexDialer == nil {
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound connection to ", destination)
case N.NetworkUDP:
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
}
return (*vmessDialer)(h).DialContext(ctx, network, destination)
} else {
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound multiplex connection to ", destination)
case N.NetworkUDP:
h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
}
return h.multiplexDialer.DialContext(ctx, network, destination)
}
}
func (h *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
if h.multiplexDialer == nil {
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
return (*vmessDialer)(h).ListenPacket(ctx, destination)
} else {
h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
return h.multiplexDialer.ListenPacket(ctx, destination)
}
}
type vmessDialer Outbound
func (h *vmessDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
ctx, metadata := adapter.ExtendContext(ctx)
metadata.Outbound = h.Tag()
metadata.Destination = destination
var conn net.Conn
var err error
if h.transport != nil {
conn, err = h.transport.DialContext(ctx)
} else {
conn, err = h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
if err == nil && h.tlsConfig != nil {
conn, err = tls.ClientHandshake(ctx, conn, h.tlsConfig)
}
}
if err != nil {
common.Close(conn)
return nil, err
}
switch N.NetworkName(network) {
case N.NetworkTCP:
return h.client.DialEarlyConn(conn, destination), nil
case N.NetworkUDP:
return h.client.DialEarlyPacketConn(conn, destination), nil
default:
return nil, E.Extend(N.ErrUnknownNetwork, network)
}
}
func (h *vmessDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
ctx, metadata := adapter.ExtendContext(ctx)
metadata.Outbound = h.Tag()
metadata.Destination = destination
var conn net.Conn
var err error
if h.transport != nil {
conn, err = h.transport.DialContext(ctx)
} else {
conn, err = h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
if err == nil && h.tlsConfig != nil {
conn, err = tls.ClientHandshake(ctx, conn, h.tlsConfig)
}
}
if err != nil {
return nil, err
}
if h.packetAddr {
if destination.IsFqdn() {
return nil, E.New("packetaddr: domain destination is not supported")
}
return packetaddr.NewConn(h.client.DialEarlyPacketConn(conn, M.Socksaddr{Fqdn: packetaddr.SeqPacketMagicAddress}), destination), nil
} else if h.xudp {
return h.client.DialEarlyXUDPPacketConn(conn, destination), nil
} else {
return h.client.DialEarlyPacketConn(conn, destination), nil
}
}