sing-box/outbound/shadowsocks.go

189 lines
6 KiB
Go

package outbound
import (
"context"
"net"
"github.com/sagernet/sing-box/adapter"
"github.com/sagernet/sing-box/common/dialer"
"github.com/sagernet/sing-box/common/mux"
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/sip003"
"github.com/sagernet/sing-shadowsocks2"
"github.com/sagernet/sing/common"
"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/sagernet/sing/common/uot"
)
var _ adapter.Outbound = (*Shadowsocks)(nil)
type Shadowsocks struct {
myOutboundAdapter
dialer N.Dialer
method shadowsocks.Method
serverAddr M.Socksaddr
plugin sip003.Plugin
uotClient *uot.Client
multiplexDialer *mux.Client
}
func NewShadowsocks(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.ShadowsocksOutboundOptions) (*Shadowsocks, error) {
method, err := shadowsocks.CreateMethod(ctx, options.Method, shadowsocks.MethodOptions{
Password: options.Password,
})
if err != nil {
return nil, err
}
outboundDialer, err := dialer.New(router, options.DialerOptions)
if err != nil {
return nil, err
}
outbound := &Shadowsocks{
myOutboundAdapter: myOutboundAdapter{
protocol: C.TypeShadowsocks,
network: options.Network.Build(),
router: router,
logger: logger,
tag: tag,
dependencies: withDialerDependency(options.DialerOptions),
},
dialer: outboundDialer,
method: method,
serverAddr: options.ServerOptions.Build(),
}
if options.Plugin != "" {
outbound.plugin, err = sip003.CreatePlugin(ctx, options.Plugin, options.PluginOptions, router, outbound.dialer, outbound.serverAddr)
if err != nil {
return nil, err
}
}
uotOptions := common.PtrValueOrDefault(options.UDPOverTCP)
if !uotOptions.Enabled {
outbound.multiplexDialer, err = mux.NewClientWithOptions((*shadowsocksDialer)(outbound), logger, common.PtrValueOrDefault(options.Multiplex))
if err != nil {
return nil, err
}
}
if uotOptions.Enabled {
outbound.uotClient = &uot.Client{
Dialer: (*shadowsocksDialer)(outbound),
Version: uotOptions.Version,
}
}
return outbound, nil
}
func (h *Shadowsocks) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
if h.multiplexDialer == nil {
switch N.NetworkName(network) {
case N.NetworkTCP:
h.logger.InfoContext(ctx, "outbound connection to ", destination)
case N.NetworkUDP:
if h.uotClient != nil {
h.logger.InfoContext(ctx, "outbound UoT connect packet connection to ", destination)
return h.uotClient.DialContext(ctx, network, destination)
} else {
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
}
}
return (*shadowsocksDialer)(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 *Shadowsocks) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
if h.multiplexDialer == nil {
if h.uotClient != nil {
h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination)
return h.uotClient.ListenPacket(ctx, destination)
} else {
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
}
h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
return (*shadowsocksDialer)(h).ListenPacket(ctx, destination)
} else {
h.logger.InfoContext(ctx, "outbound multiplex packet connection to ", destination)
return h.multiplexDialer.ListenPacket(ctx, destination)
}
}
func (h *Shadowsocks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
return NewConnection(ctx, h, conn, metadata)
}
func (h *Shadowsocks) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
return NewPacketConnection(ctx, h, conn, metadata)
}
func (h *Shadowsocks) InterfaceUpdated() {
if h.multiplexDialer != nil {
h.multiplexDialer.Reset()
}
return
}
func (h *Shadowsocks) Close() error {
return common.Close(common.PtrOrNil(h.multiplexDialer))
}
var _ N.Dialer = (*shadowsocksDialer)(nil)
type shadowsocksDialer Shadowsocks
func (h *shadowsocksDialer) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
switch N.NetworkName(network) {
case N.NetworkTCP:
var outConn net.Conn
var err error
if h.plugin != nil {
outConn, err = h.plugin.DialContext(ctx)
} else {
outConn, err = h.dialer.DialContext(ctx, N.NetworkTCP, h.serverAddr)
}
if err != nil {
return nil, err
}
return h.method.DialEarlyConn(outConn, destination), nil
case N.NetworkUDP:
outConn, err := h.dialer.DialContext(ctx, N.NetworkUDP, h.serverAddr)
if err != nil {
return nil, err
}
return bufio.NewBindPacketConn(h.method.DialPacketConn(outConn), destination), nil
default:
return nil, E.Extend(N.ErrUnknownNetwork, network)
}
}
func (h *shadowsocksDialer) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
metadata.Destination = destination
outConn, err := h.dialer.DialContext(ctx, N.NetworkUDP, h.serverAddr)
if err != nil {
return nil, err
}
return h.method.DialPacketConn(outConn), nil
}