Enhance DNS and Dialer (#341)

app/dns/server.go

@@ -22,6 +22,7 @@ import (
 	"github.com/xtls/xray-core/features"
 	"github.com/xtls/xray-core/features/dns"
 	"github.com/xtls/xray-core/features/routing"
+	"github.com/xtls/xray-core/transport/internet"
 )
 
 // Server is a DNS rely server.
@@ -301,6 +302,7 @@ func (s *Server) queryIPTimeout(idx int, client Client, domain string, option IP
 			Tag: s.tag,
 		})
 	}
+	ctx = internet.ContextWithLookupDomain(ctx, Fqdn(domain))
 	ips, err := client.QueryIP(ctx, domain, option)
 	cancel()