131 lines
4.0 KiB
Go
131 lines
4.0 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/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-dns"
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"github.com/sagernet/sing/common"
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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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"github.com/sagernet/sing/common/uot"
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"github.com/sagernet/sing/protocol/socks"
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)
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var _ adapter.Outbound = (*Socks)(nil)
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type Socks struct {
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myOutboundAdapter
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client *socks.Client
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resolve bool
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uotClient *uot.Client
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}
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func NewSocks(router adapter.Router, logger log.ContextLogger, tag string, options option.SocksOutboundOptions) (*Socks, error) {
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var version socks.Version
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var err error
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if options.Version != "" {
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version, err = socks.ParseVersion(options.Version)
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} else {
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version = socks.Version5
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}
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if err != nil {
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return nil, err
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}
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outboundDialer, err := dialer.New(router, options.DialerOptions)
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if err != nil {
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return nil, err
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}
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outbound := &Socks{
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myOutboundAdapter: myOutboundAdapter{
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protocol: C.TypeSOCKS,
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network: options.Network.Build(),
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router: router,
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logger: logger,
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tag: tag,
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dependencies: withDialerDependency(options.DialerOptions),
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},
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client: socks.NewClient(outboundDialer, options.ServerOptions.Build(), version, options.Username, options.Password),
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resolve: version == socks.Version4,
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}
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uotOptions := common.PtrValueOrDefault(options.UDPOverTCP)
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if uotOptions.Enabled {
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outbound.uotClient = &uot.Client{
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Dialer: outbound.client,
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Version: uotOptions.Version,
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}
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}
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return outbound, nil
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}
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func (h *Socks) 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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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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case N.NetworkUDP:
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if h.uotClient != nil {
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h.logger.InfoContext(ctx, "outbound UoT connect packet connection to ", destination)
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return h.uotClient.DialContext(ctx, network, destination)
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}
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h.logger.InfoContext(ctx, "outbound packet connection to ", destination)
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default:
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return nil, E.Extend(N.ErrUnknownNetwork, network)
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}
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if h.resolve && destination.IsFqdn() {
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destinationAddresses, err := h.router.LookupDefault(ctx, destination.Fqdn)
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if err != nil {
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return nil, err
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}
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return N.DialSerial(ctx, h.client, network, destination, destinationAddresses)
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}
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return h.client.DialContext(ctx, network, destination)
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}
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func (h *Socks) 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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metadata.Destination = destination
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if h.uotClient != nil {
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h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination)
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return h.uotClient.ListenPacket(ctx, destination)
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}
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if h.resolve && destination.IsFqdn() {
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destinationAddresses, err := h.router.LookupDefault(ctx, destination.Fqdn)
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if err != nil {
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return nil, err
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}
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packetConn, _, err := N.ListenSerial(ctx, h.client, destination, destinationAddresses)
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if err != nil {
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return nil, err
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}
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return packetConn, nil
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}
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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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func (h *Socks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
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if h.resolve {
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return NewDirectConnection(ctx, h.router, h, conn, metadata, dns.DomainStrategyUseIPv4)
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} else {
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return NewConnection(ctx, h, conn, metadata)
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}
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}
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func (h *Socks) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
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if h.resolve {
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return NewDirectPacketConnection(ctx, h.router, h, conn, metadata, dns.DomainStrategyUseIPv4)
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} else {
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return NewPacketConnection(ctx, h, conn, metadata)
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}
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}
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