feature: prohibit the IPv6 to communicate with supernode

Signed-off-by: fengzixu <[email protected]>

pkg/httputils/http_util.go

@@ -312,7 +312,9 @@ func CheckConnect(ip string, port int, timeout int) (localIP string, e error) {
 
 	var conn net.Conn
 	addr := fmt.Sprintf("%s:%d", ip, port)
-	if conn, e = net.DialTimeout("tcp", addr, t); e == nil {
+	// Just temporarily limit users can only use IP addr for IPv4 format.
+	// In the near future, if we want to support IPv6, we can revise logic as below.
+	if conn, e = net.DialTimeout("tcp4", addr, t); e == nil {
 		localIP = conn.LocalAddr().String()
 		conn.Close()
 		if idx := strings.LastIndexByte(localIP, ':'); idx >= 0 {

pkg/httputils/http_util_test.go

@@ -118,6 +118,10 @@ func (s *HTTPUtilTestSuite) TestCheckConnect(c *check.C) {
 	ip, e := CheckConnect("127.0.0.1", s.port, 0)
 	c.Assert(e, check.IsNil)
 	c.Assert(ip, check.Equals, "127.0.0.1")
+
+	// Test IPv6
+	_, e = CheckConnect("[::1]", s.port, 0)
+	c.Assert(e, check.NotNil)
 }
 
 func (s *HTTPUtilTestSuite) TestGetRangeSE(c *check.C) {