mirror of
https://github.com/shtorm-7/sing-box-extended.git
synced 2026-06-26 20:29:03 +03:00
115 lines
3.5 KiB
Go
115 lines
3.5 KiB
Go
package snell
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import (
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"context"
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"fmt"
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"net"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/adapter/outbound"
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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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"github.com/sagernet/sing-box/transport/snell"
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"github.com/sagernet/sing/common"
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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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"github.com/sagernet/sing/common/logger"
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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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func RegisterOutbound(registry *outbound.Registry) {
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outbound.Register[option.SnellOutboundOptions](registry, C.TypeSnell, NewOutbound)
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}
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type Outbound struct {
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outbound.Adapter
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logger logger.ContextLogger
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client *snell.Client
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}
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func NewOutbound(ctx context.Context, router adapter.Router, logger log.ContextLogger, tag string, options option.SnellOutboundOptions) (adapter.Outbound, error) {
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if options.PSK == "" {
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return nil, E.New("snell requires psk")
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}
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version := options.Version
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if version == 0 {
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version = snell.DefaultSnellVersion
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}
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if version == snell.Version5 {
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version = snell.Version4
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}
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udpEnabled := common.Contains(options.Network.Build(), N.NetworkUDP)
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switch version {
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case snell.Version1, snell.Version2:
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if udpEnabled {
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return nil, fmt.Errorf("snell version %d does not support UDP", version)
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}
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case snell.Version3, snell.Version4:
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default:
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return nil, fmt.Errorf("snell version error: %d", version)
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}
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reuse := version == snell.Version2 || (version == snell.Version4 && options.Reuse)
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obfsMode := ""
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obfsHost := "bing.com"
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if options.Obfs != nil {
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switch options.Obfs.Mode {
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case "", "tls", "http":
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obfsMode = options.Obfs.Mode
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default:
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return nil, fmt.Errorf("snell obfs mode error: %s", options.Obfs.Mode)
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}
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if options.Obfs.Host != "" {
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obfsHost = options.Obfs.Host
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}
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}
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outboundDialer, err := dialer.New(ctx, options.DialerOptions, options.ServerIsDomain())
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if err != nil {
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return nil, err
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}
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client := snell.NewClient(snell.ClientOptions{
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Dialer: outboundDialer,
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Server: options.ServerOptions.Build(),
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PSK: []byte(options.PSK),
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Version: version,
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Reuse: reuse,
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ObfsMode: obfsMode,
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ObfsHost: obfsHost,
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})
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return &Outbound{
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Adapter: outbound.NewAdapterWithDialerOptions(C.TypeSnell, tag, options.Network.Build(), options.DialerOptions),
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logger: logger,
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client: client,
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}, nil
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}
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func (h *Outbound) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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ctx, metadata := adapter.ExtendContext(ctx)
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metadata.Outbound = h.Tag()
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metadata.Destination = destination
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switch N.NetworkName(network) {
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case N.NetworkTCP:
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h.logger.InfoContext(ctx, "outbound connection to ", destination)
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return h.client.DialContext(ctx, destination)
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case N.NetworkUDP:
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h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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conn, err := h.client.ListenPacket(ctx, destination)
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if err != nil {
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return nil, err
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}
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return bufio.NewBindPacketConn(conn, destination), nil
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default:
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return nil, E.Extend(N.ErrUnknownNetwork, network)
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}
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}
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func (h *Outbound) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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ctx, metadata := adapter.ExtendContext(ctx)
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metadata.Outbound = h.Tag()
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metadata.Destination = destination
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h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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return h.client.ListenPacket(ctx, destination)
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}
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