mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-20 10:37:51 +00:00
105 lines
3.1 KiB
Go
105 lines
3.1 KiB
Go
package shadowsocks
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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/common/dialer"
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"github.com/sagernet/sing-box/common/tunnel"
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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 = (*Outbound)(nil)
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type Outbound struct {
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tag string
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logger log.Logger
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dialer N.Dialer
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method shadowsocks.Method
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serverAddr M.Socksaddr
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}
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func NewOutbound(tag string, router adapter.Router, logger log.Logger, options *config.ShadowsocksOutboundOptions) (outbound *Outbound, err error) {
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outbound = &Outbound{
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tag: tag,
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logger: logger,
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dialer: dialer.NewDialer(router, options.DialerOptions),
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}
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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
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}
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if options.Server == "" {
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err = E.New("missing server address")
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return
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} else if options.ServerPort == 0 {
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err = E.New("missing server port")
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return
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}
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outbound.serverAddr = M.ParseSocksaddrHostPort(options.Server, options.ServerPort)
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return
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}
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func (o *Outbound) Type() string {
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return C.TypeShadowsocks
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}
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func (o *Outbound) Tag() string {
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return o.tag
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}
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func (o *Outbound) 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 tunnel.CopyEarlyConn(ctx, conn, serverConn)
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}
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func (o *Outbound) 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 *Outbound) 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 *Outbound) 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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