k8s.io/apiserver@v0.31.1/pkg/server/config_selfclient_test.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package server
    18  
    19  import (
    20  	"net"
    21  	"testing"
    22  
    23  	netutils "k8s.io/utils/net"
    24  )
    25  
    26  func TestLoopbackHostPortIPv4(t *testing.T) {
    27  	_, ipv6only, err := isIPv6LoopbackSupported()
    28  	if err != nil {
    29  		t.Fatalf("fail to enumerate network interface, %s", err)
    30  	}
    31  	if ipv6only {
    32  		t.Fatalf("no ipv4 loopback interface")
    33  	}
    34  
    35  	host, port, err := LoopbackHostPort("1.2.3.4:443")
    36  	if err != nil {
    37  		t.Fatalf("unexpected error: %v", err)
    38  	}
    39  	if host != "1.2.3.4" {
    40  		t.Fatalf("expected 1.2.3.4 as host, got %q", host)
    41  	}
    42  	if port != "443" {
    43  		t.Fatalf("expected 443 as port, got %q", port)
    44  	}
    45  
    46  	host, port, err = LoopbackHostPort("0.0.0.0:443")
    47  	if err != nil {
    48  		t.Fatalf("unexpected error: %v", err)
    49  	}
    50  	if ip := netutils.ParseIPSloppy(host); ip == nil || !ip.IsLoopback() {
    51  		t.Fatalf("expected host to be loopback, got %q", host)
    52  	}
    53  	if port != "443" {
    54  		t.Fatalf("expected 443 as port, got %q", port)
    55  	}
    56  }
    57  func TestLoopbackHostPortIPv6(t *testing.T) {
    58  	ipv6, _, err := isIPv6LoopbackSupported()
    59  	if err != nil {
    60  		t.Fatalf("fail to enumerate network interface, %s", err)
    61  	}
    62  	if !ipv6 {
    63  		t.Skip("no ipv6 loopback interface")
    64  	}
    65  
    66  	host, port, err := LoopbackHostPort("[ff06:0:0:0:0:0:0:c3]:443")
    67  	if err != nil {
    68  		t.Fatalf("unexpected error: %v", err)
    69  	}
    70  	if host != "ff06:0:0:0:0:0:0:c3" {
    71  		t.Fatalf("expected ff06:0:0:0:0:0:0:c3 as host, got %q", host)
    72  	}
    73  	if port != "443" {
    74  		t.Fatalf("expected 443 as port, got %q", port)
    75  	}
    76  
    77  	host, port, err = LoopbackHostPort("[::]:443")
    78  	if err != nil {
    79  		t.Fatalf("unexpected error: %v", err)
    80  	}
    81  	if ip := netutils.ParseIPSloppy(host); ip == nil || !ip.IsLoopback() || ip.To4() != nil {
    82  		t.Fatalf("expected IPv6 host to be loopback, got %q", host)
    83  	}
    84  	if port != "443" {
    85  		t.Fatalf("expected 443 as port, got %q", port)
    86  	}
    87  }
    88  
    89  func isIPv6LoopbackSupported() (ipv6 bool, ipv6only bool, err error) {
    90  	addrs, err := net.InterfaceAddrs()
    91  	if err != nil {
    92  		return false, false, err
    93  	}
    94  	ipv4 := false
    95  	for _, address := range addrs {
    96  		ipnet, ok := address.(*net.IPNet)
    97  		if !ok || !ipnet.IP.IsLoopback() {
    98  			continue
    99  		}
   100  		if netutils.IsIPv6(ipnet.IP) {
   101  			ipv6 = true
   102  			continue
   103  		}
   104  		ipv4 = true
   105  	}
   106  	ipv6only = ipv6 && !ipv4
   107  	return ipv6, ipv6only, nil
   108  }