新增调试信息

libcore/v2/common/utils.go

@@ -0,0 +1,25 @@
+package common
+
+import (
+	"net"
+	"net/netip"
+	"time"
+)
+
+func CanConnectIPv6Addr(remoteAddr netip.AddrPort) bool {
+	dialer := net.Dialer{
+		Timeout: 1 * time.Second,
+	}
+
+	conn, err := dialer.Dial("tcp6", remoteAddr.String())
+	if err != nil {
+		return false
+	}
+	defer conn.Close()
+
+	return true
+}
+
+func CanConnectIPv6() bool {
+	return CanConnectIPv6Addr(netip.MustParseAddrPort("[2001:4860:4860::8888]:80"))
+}