mirror of
https://github.com/SagerNet/sing-box.git
synced 2025-06-08 03:34:13 +08:00
94 lines
2.7 KiB
Go
94 lines
2.7 KiB
Go
package direct
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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/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/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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)
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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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overrideOption int
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overrideDestination M.Socksaddr
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}
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func NewOutbound(tag string, router adapter.Router, logger log.Logger, options *config.DirectOutboundOptions) (outbound *Outbound) {
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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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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
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}
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func (d *Outbound) Type() string {
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return C.TypeDirect
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}
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func (d *Outbound) Tag() string {
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return d.tag
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}
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func (d *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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switch d.overrideOption {
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case 0:
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destination = d.overrideDestination
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case 1:
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newDestination := d.overrideDestination
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newDestination.Port = destination.Port
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destination = newDestination
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case 2:
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destination.Port = d.overrideDestination.Port
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}
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switch network {
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case C.NetworkTCP:
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d.logger.WithContext(ctx).Debug("outbound connection to ", destination)
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case C.NetworkUDP:
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d.logger.WithContext(ctx).Debug("outbound packet connection to ", destination)
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}
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return d.dialer.DialContext(ctx, network, destination)
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}
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func (d *Outbound) ListenPacket(ctx context.Context) (net.PacketConn, error) {
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d.logger.WithContext(ctx).Debug("outbound packet connection")
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return d.dialer.ListenPacket(ctx)
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}
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func (d *Outbound) NewConnection(ctx context.Context, conn net.Conn, destination M.Socksaddr) error {
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outConn, err := d.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 bufio.CopyConn(ctx, conn, outConn)
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}
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func (d *Outbound) NewPacketConnection(ctx context.Context, conn N.PacketConn, destination M.Socksaddr) error {
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outConn, err := d.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(outConn))
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}
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