initial commit

chain/transport.go

@@ -0,0 +1,100 @@
+package chain
+
+import (
+	"context"
+	"net"
+	"time"
+
+	net_dialer "github.com/go-gost/core/common/net/dialer"
+	"github.com/go-gost/core/connector"
+	"github.com/go-gost/core/dialer"
+)
+
+type Transport struct {
+	addr      string
+	ifceName  string
+	route     *Route
+	dialer    dialer.Dialer
+	connector connector.Connector
+}
+
+func (tr *Transport) Copy() *Transport {
+	tr2 := &Transport{}
+	*tr2 = *tr
+	return tr
+}
+
+func (tr *Transport) WithInterface(ifceName string) *Transport {
+	tr.ifceName = ifceName
+	return tr
+}
+
+func (tr *Transport) WithDialer(dialer dialer.Dialer) *Transport {
+	tr.dialer = dialer
+	return tr
+}
+
+func (tr *Transport) WithConnector(connector connector.Connector) *Transport {
+	tr.connector = connector
+	return tr
+}
+
+func (tr *Transport) Dial(ctx context.Context, addr string) (net.Conn, error) {
+	netd := &net_dialer.NetDialer{
+		Interface: tr.ifceName,
+		Timeout:   30 * time.Second,
+	}
+	if tr.route.Len() > 0 {
+		netd.DialFunc = func(ctx context.Context, network, addr string) (net.Conn, error) {
+			return tr.route.Dial(ctx, network, addr)
+		}
+	}
+	opts := []dialer.DialOption{
+		dialer.HostDialOption(tr.addr),
+		dialer.NetDialerDialOption(netd),
+	}
+	return tr.dialer.Dial(ctx, addr, opts...)
+}
+
+func (tr *Transport) Handshake(ctx context.Context, conn net.Conn) (net.Conn, error) {
+	var err error
+	if hs, ok := tr.dialer.(dialer.Handshaker); ok {
+		conn, err = hs.Handshake(ctx, conn,
+			dialer.AddrHandshakeOption(tr.addr))
+		if err != nil {
+			return nil, err
+		}
+	}
+	if hs, ok := tr.connector.(connector.Handshaker); ok {
+		return hs.Handshake(ctx, conn)
+	}
+	return conn, nil
+}
+
+func (tr *Transport) Connect(ctx context.Context, conn net.Conn, network, address string) (net.Conn, error) {
+	return tr.connector.Connect(ctx, conn, network, address)
+}
+
+func (tr *Transport) Bind(ctx context.Context, conn net.Conn, network, address string, opts ...connector.BindOption) (net.Listener, error) {
+	if binder, ok := tr.connector.(connector.Binder); ok {
+		return binder.Bind(ctx, conn, network, address, opts...)
+	}
+	return nil, connector.ErrBindUnsupported
+}
+
+func (tr *Transport) Multiplex() bool {
+	if mux, ok := tr.dialer.(dialer.Multiplexer); ok {
+		return mux.Multiplex()
+	}
+	return false
+}
+
+func (tr *Transport) WithRoute(r *Route) *Transport {
+	tr.route = r
+	return tr
+}
+
+func (tr *Transport) WithAddr(addr string) *Transport {
+	tr.addr = addr
+	return tr
+}