sing-box/outbound/socks.go

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package outbound
import (
"context"
"net"
"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"
"github.com/sagernet/sing-box/log"
"github.com/sagernet/sing-box/option"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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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)
var _ adapter.Outbound = (*Socks)(nil)
type Socks struct {
myOutboundAdapter
client *socks.Client
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uot bool
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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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detour := dialer.NewOutbound(router, options.OutboundDialerOptions)
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var version socks.Version
var err error
if options.Version != "" {
version, err = socks.ParseVersion(options.Version)
} else {
version = socks.Version5
}
if err != nil {
return nil, err
}
return &Socks{
myOutboundAdapter{
protocol: C.TypeSocks,
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network: options.Network.Build(),
router: router,
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logger: logger,
tag: tag,
},
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socks.NewClient(detour, options.ServerOptions.Build(), version, options.Username, options.Password),
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options.UoT,
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}, nil
}
func (h *Socks) DialContext(ctx context.Context, network string, destination M.Socksaddr) (net.Conn, error) {
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ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
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metadata.Destination = destination
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switch N.NetworkName(network) {
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.uot {
h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination)
tcpConn, err := h.client.DialContext(ctx, N.NetworkTCP, M.Socksaddr{
Fqdn: uot.UOTMagicAddress,
Port: destination.Port,
})
if err != nil {
return nil, err
}
return uot.NewClientConn(tcpConn), nil
}
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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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}
return h.client.DialContext(ctx, network, destination)
}
func (h *Socks) ListenPacket(ctx context.Context, destination M.Socksaddr) (net.PacketConn, error) {
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ctx, metadata := adapter.AppendContext(ctx)
metadata.Outbound = h.tag
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metadata.Destination = destination
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if h.uot {
h.logger.InfoContext(ctx, "outbound UoT packet connection to ", destination)
tcpConn, err := h.client.DialContext(ctx, N.NetworkTCP, M.Socksaddr{
Fqdn: uot.UOTMagicAddress,
Port: destination.Port,
})
if err != nil {
return nil, err
}
return uot.NewClientConn(tcpConn), nil
}
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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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func (h *Socks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
return NewConnection(ctx, h, conn, metadata)
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}
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func (h *Socks) NewPacketConnection(ctx context.Context, conn N.PacketConn, metadata adapter.InboundContext) error {
return NewPacketConnection(ctx, h, conn, metadata)
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}