mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-10 02:53:12 +00:00
95 lines
2.9 KiB
Go
95 lines
2.9 KiB
Go
package outbound
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import (
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"context"
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"net"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/config"
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C "github.com/sagernet/sing-box/constant"
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"github.com/sagernet/sing-box/log"
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"github.com/sagernet/sing-shadowsocks"
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"github.com/sagernet/sing-shadowsocks/shadowimpl"
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"github.com/sagernet/sing/common/bufio"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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)
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var _ adapter.Outbound = (*Shadowsocks)(nil)
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type Shadowsocks struct {
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myOutboundAdapter
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method shadowsocks.Method
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serverAddr M.Socksaddr
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}
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func NewShadowsocks(router adapter.Router, logger log.Logger, tag string, options *config.ShadowsocksOutboundOptions) (*Shadowsocks, error) {
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outbound := &Shadowsocks{
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myOutboundAdapter: myOutboundAdapter{
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protocol: C.TypeDirect,
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logger: logger,
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tag: tag,
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dialer: NewDialer(router, options.DialerOptions),
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},
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}
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var err error
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outbound.method, err = shadowimpl.FetchMethod(options.Method, options.Password)
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if err != nil {
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return nil, err
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}
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if options.Server == "" {
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return nil, E.New("missing server address")
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} else if options.ServerPort == 0 {
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return nil, E.New("missing server port")
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}
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outbound.serverAddr = M.ParseSocksaddrHostPort(options.Server, options.ServerPort)
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return outbound, nil
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}
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func (o *Shadowsocks) NewConnection(ctx context.Context, conn net.Conn, destination M.Socksaddr) error {
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serverConn, err := o.DialContext(ctx, "tcp", destination)
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if err != nil {
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return err
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}
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return CopyEarlyConn(ctx, conn, serverConn)
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}
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func (o *Shadowsocks) NewPacketConnection(ctx context.Context, conn N.PacketConn, destination M.Socksaddr) error {
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serverConn, err := o.ListenPacket(ctx)
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if err != nil {
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return err
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}
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return bufio.CopyPacketConn(ctx, conn, bufio.NewPacketConn(serverConn))
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}
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func (o *Shadowsocks) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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switch network {
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case C.NetworkTCP:
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o.logger.WithContext(ctx).Debug("outbound connection to ", destination)
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outConn, err := o.dialer.DialContext(ctx, "tcp", o.serverAddr)
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if err != nil {
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return nil, err
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}
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return o.method.DialEarlyConn(outConn, destination), nil
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case C.NetworkUDP:
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o.logger.WithContext(ctx).Debug("outbound packet connection to ", destination)
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outConn, err := o.dialer.DialContext(ctx, "udp", o.serverAddr)
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if err != nil {
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return nil, err
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}
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return &bufio.BindPacketConn{PacketConn: o.method.DialPacketConn(outConn), Addr: destination}, nil
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default:
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panic("unknown network " + network)
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}
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}
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func (o *Shadowsocks) ListenPacket(ctx context.Context) (net.PacketConn, error) {
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o.logger.WithContext(ctx).Debug("outbound packet connection to ", o.serverAddr)
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outConn, err := o.dialer.ListenPacket(ctx)
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if err != nil {
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return nil, err
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}
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return o.method.DialPacketConn(&bufio.BindPacketConn{PacketConn: outConn, Addr: o.serverAddr.UDPAddr()}), nil
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}
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