mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-16 10:12:21 +08:00
94 lines
2.9 KiB
Go
94 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/common/bufio"
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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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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/dialer"
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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-box/option"
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)
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var _ adapter.Outbound = (*Direct)(nil)
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type Direct struct {
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myOutboundAdapter
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dialer N.Dialer
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overrideOption int
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overrideDestination M.Socksaddr
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}
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func NewDirect(router adapter.Router, logger log.Logger, tag string, options option.DirectOutboundOptions) *Direct {
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outbound := &Direct{
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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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network: []string{C.NetworkTCP, C.NetworkUDP},
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},
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dialer: dialer.New(router, options.DialerOptions),
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}
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if options.OverrideAddress != "" && options.OverridePort != 0 {
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outbound.overrideOption = 1
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outbound.overrideDestination = M.ParseSocksaddrHostPort(options.OverrideAddress, options.OverridePort)
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} else if options.OverrideAddress != "" {
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outbound.overrideOption = 2
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outbound.overrideDestination = M.ParseSocksaddrHostPort(options.OverrideAddress, options.OverridePort)
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} else if options.OverridePort != 0 {
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outbound.overrideOption = 3
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outbound.overrideDestination = M.Socksaddr{Port: options.OverridePort}
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}
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return outbound
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}
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func (h *Direct) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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ctx, metadata := adapter.AppendContext(ctx)
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metadata.Outbound = h.tag
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switch h.overrideOption {
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case 1:
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destination = h.overrideDestination
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case 2:
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newDestination := h.overrideDestination
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newDestination.Port = destination.Port
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destination = newDestination
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case 3:
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destination.Port = h.overrideDestination.Port
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}
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switch network {
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case C.NetworkTCP:
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h.logger.WithContext(ctx).Info("outbound connection to ", destination)
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case C.NetworkUDP:
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h.logger.WithContext(ctx).Info("outbound packet connection to ", destination)
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}
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return h.dialer.DialContext(ctx, network, destination)
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}
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func (h *Direct) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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ctx, metadata := adapter.AppendContext(ctx)
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metadata.Outbound = h.tag
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h.logger.WithContext(ctx).Info("outbound packet connection")
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return h.dialer.ListenPacket(ctx, destination)
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}
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func (h *Direct) NewConnection(ctx context.Context, conn net.Conn, destination M.Socksaddr) error {
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outConn, err := h.DialContext(ctx, C.NetworkTCP, destination)
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if err != nil {
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return err
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}
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return bufio.CopyConn(ctx, conn, outConn)
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}
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func (h *Direct) NewPacketConnection(ctx context.Context, conn N.PacketConn, destination M.Socksaddr) error {
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outConn, err := h.ListenPacket(ctx, destination)
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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(outConn))
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}
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