Refactor adapter

adapter/inbound/shadowsocks.go

@@ -0,0 +1,73 @@
+package inbound
+
+import (
+	"context"
+	"net"
+
+	"github.com/sagernet/sing-box/adapter"
+	"github.com/sagernet/sing-box/config"
+	C "github.com/sagernet/sing-box/constant"
+	"github.com/sagernet/sing-box/log"
+	"github.com/sagernet/sing-shadowsocks"
+	"github.com/sagernet/sing-shadowsocks/shadowaead"
+	"github.com/sagernet/sing-shadowsocks/shadowaead_2022"
+	"github.com/sagernet/sing/common"
+	"github.com/sagernet/sing/common/buf"
+	E "github.com/sagernet/sing/common/exceptions"
+	M "github.com/sagernet/sing/common/metadata"
+	N "github.com/sagernet/sing/common/network"
+)
+
+var _ adapter.Inbound = (*Shadowsocks)(nil)
+
+type Shadowsocks struct {
+	myInboundAdapter
+	service shadowsocks.Service
+}
+
+func NewShadowsocks(ctx context.Context, router adapter.Router, logger log.Logger, tag string, options *config.ShadowsocksInboundOptions) (*Shadowsocks, error) {
+	inbound := &Shadowsocks{
+		myInboundAdapter: myInboundAdapter{
+			protocol:      C.TypeShadowsocks,
+			network:       options.Network.Build(),
+			ctx:           ctx,
+			router:        router,
+			logger:        logger,
+			tag:           tag,
+			listenOptions: options.ListenOptions,
+		},
+	}
+	inbound.connHandler = inbound
+	inbound.packetHandler = inbound
+	inbound.packetUpstream = true
+	var udpTimeout int64
+	if options.UDPTimeout != 0 {
+		udpTimeout = options.UDPTimeout
+	} else {
+		udpTimeout = 300
+	}
+	var err error
+	switch {
+	case options.Method == shadowsocks.MethodNone:
+		inbound.service = shadowsocks.NewNoneService(options.UDPTimeout, inbound.upstreamContextHandler())
+	case common.Contains(shadowaead.List, options.Method):
+		inbound.service, err = shadowaead.NewService(options.Method, nil, options.Password, udpTimeout, inbound.upstreamContextHandler())
+	case common.Contains(shadowaead_2022.List, options.Method):
+		inbound.service, err = shadowaead_2022.NewServiceWithPassword(options.Method, options.Password, udpTimeout, inbound.upstreamContextHandler())
+	default:
+		err = E.New("shadowsocks: unsupported method: ", options.Method)
+	}
+	return inbound, err
+}
+
+func (h *Shadowsocks) NewConnection(ctx context.Context, conn net.Conn, metadata adapter.InboundContext) error {
+	return h.service.NewConnection(&adapter.MetadataContext{Context: ctx, Metadata: metadata}, conn, M.Metadata{
+		Source: M.SocksaddrFromNetIP(metadata.Source),
+	})
+}
+
+func (h *Shadowsocks) NewPacket(ctx context.Context, conn N.PacketConn, buffer *buf.Buffer, metadata adapter.InboundContext) error {
+	return h.service.NewPacket(&adapter.MetadataContext{Context: ctx, Metadata: metadata}, conn, buffer, M.Metadata{
+		Source: M.SocksaddrFromNetIP(metadata.Source),
+	})
+}