add network for bypass

bypass/bypass.go

@@ -2,10 +2,22 @@ package bypass
 
 import "context"
 
+type Options struct {
+	Host string
+}
+
+type Option func(opts *Options)
+
+func WithHostOpton(host string) Option {
+	return func(opts *Options) {
+		opts.Host = host
+	}
+}
+
 // Bypass is a filter of address (IP or domain).
 type Bypass interface {
 	// Contains reports whether the bypass includes addr.
-	Contains(ctx context.Context, addr string) bool
+	Contains(ctx context.Context, network, addr string, opts ...Option) bool
 }
 
 type bypassGroup struct {
@@ -18,9 +30,9 @@ func BypassGroup(bypasses ...Bypass) Bypass {
 	}
 }
 
-func (p *bypassGroup) Contains(ctx context.Context, addr string) bool {
+func (p *bypassGroup) Contains(ctx context.Context, network, addr string, opts ...Option) bool {
 	for _, bypass := range p.bypasses {
-		if bypass != nil && bypass.Contains(ctx, addr) {
+		if bypass != nil && bypass.Contains(ctx, network, addr, opts...) {
 			return true
 		}
 	}

chain/chain.go

@@ -4,6 +4,18 @@ import (
 	"context"
 )
 
-type Chainer interface {
-	Route(ctx context.Context, network, address string) Route
+type RouteOptions struct {
+	Host string
+}
+
+type RouteOption func(opts *RouteOptions)
+
+func WithHostRouteOption(host string) RouteOption {
+	return func(opts *RouteOptions) {
+		opts.Host = host
+	}
+}
+
+type Chainer interface {
+	Route(ctx context.Context, network, address string, opts ...RouteOption) Route
 }

chain/router.go

@@ -155,7 +155,8 @@ func (r *Router) dial(ctx context.Context, network, address string) (conn net.Co
 	r.options.Logger.Debugf("dial %s/%s", address, network)
 
 	for i := 0; i < count; i++ {
-		address, err = Resolve(ctx, "ip", address, r.options.Resolver, r.options.HostMapper, r.options.Logger)
+		var ipAddr string
+		ipAddr, err = Resolve(ctx, "ip", address, r.options.Resolver, r.options.HostMapper, r.options.Logger)
 		if err != nil {
 			r.options.Logger.Error(err)
 			break
@@ -163,7 +164,7 @@ func (r *Router) dial(ctx context.Context, network, address string) (conn net.Co
 
 		var route Route
 		if r.options.Chain != nil {
-			route = r.options.Chain.Route(ctx, network, address)
+			route = r.options.Chain.Route(ctx, network, ipAddr, WithHostRouteOption(address))
 		}
 
 		if r.options.Logger.IsLevelEnabled(logger.DebugLevel) {
@@ -171,14 +172,14 @@ func (r *Router) dial(ctx context.Context, network, address string) (conn net.Co
 			for _, node := range routePath(route) {
 				fmt.Fprintf(&buf, "%s@%s > ", node.Name, node.Addr)
 			}
-			fmt.Fprintf(&buf, "%s", address)
+			fmt.Fprintf(&buf, "%s", ipAddr)
 			r.options.Logger.Debugf("route(retry=%d) %s", i, buf.String())
 		}
 
 		if route == nil {
 			route = DefaultRoute
 		}
-		conn, err = route.Dial(ctx, network, address,
+		conn, err = route.Dial(ctx, network, ipAddr,
 			InterfaceDialOption(r.options.IfceName),
 			SockOptsDialOption(r.options.SockOpts),
 			LoggerDialOption(r.options.Logger),

hop/hop.go

@@ -7,6 +7,7 @@ import (
 )
 
 type SelectOptions struct {
+	Network  string
 	Addr     string
 	Host     string
 	Protocol string
@@ -14,6 +15,12 @@ type SelectOptions struct {
 
 type SelectOption func(*SelectOptions)
 
+func NetworkSelectOption(network string) SelectOption {
+	return func(so *SelectOptions) {
+		so.Network = network
+	}
+}
+
 func AddrSelectOption(addr string) SelectOption {
 	return func(o *SelectOptions) {
 		o.Addr = addr