icmp_test.go

Documentation: golang.org/x/net/ipv4

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package ipv4_test
     6  
     7  import (
     8  	"net"
     9  	"reflect"
    10  	"runtime"
    11  	"testing"
    12  
    13  	"golang.org/x/net/ipv4"
    14  	"golang.org/x/net/nettest"
    15  )
    16  
    17  var icmpStringTests = []struct {
    18  	in  ipv4.ICMPType
    19  	out string
    20  }{
    21  	{ipv4.ICMPTypeDestinationUnreachable, "destination unreachable"},
    22  
    23  	{256, "<nil>"},
    24  }
    25  
    26  func TestICMPString(t *testing.T) {
    27  	for _, tt := range icmpStringTests {
    28  		s := tt.in.String()
    29  		if s != tt.out {
    30  			t.Errorf("got %s; want %s", s, tt.out)
    31  		}
    32  	}
    33  }
    34  
    35  func TestICMPFilter(t *testing.T) {
    36  	switch runtime.GOOS {
    37  	case "linux":
    38  	default:
    39  		t.Skipf("not supported on %s", runtime.GOOS)
    40  	}
    41  
    42  	var f ipv4.ICMPFilter
    43  	for _, toggle := range []bool{false, true} {
    44  		f.SetAll(toggle)
    45  		for _, typ := range []ipv4.ICMPType{
    46  			ipv4.ICMPTypeDestinationUnreachable,
    47  			ipv4.ICMPTypeEchoReply,
    48  			ipv4.ICMPTypeTimeExceeded,
    49  			ipv4.ICMPTypeParameterProblem,
    50  		} {
    51  			f.Accept(typ)
    52  			if f.WillBlock(typ) {
    53  				t.Errorf("ipv4.ICMPFilter.Set(%v, false) failed", typ)
    54  			}
    55  			f.Block(typ)
    56  			if !f.WillBlock(typ) {
    57  				t.Errorf("ipv4.ICMPFilter.Set(%v, true) failed", typ)
    58  			}
    59  		}
    60  	}
    61  }
    62  
    63  func TestSetICMPFilter(t *testing.T) {
    64  	switch runtime.GOOS {
    65  	case "linux":
    66  	default:
    67  		t.Skipf("not supported on %s", runtime.GOOS)
    68  	}
    69  	if !nettest.SupportsRawSocket() {
    70  		t.Skipf("not supported on %s/%s", runtime.GOOS, runtime.GOARCH)
    71  	}
    72  
    73  	c, err := net.ListenPacket("ip4:icmp", "127.0.0.1")
    74  	if err != nil {
    75  		t.Fatal(err)
    76  	}
    77  	defer c.Close()
    78  
    79  	p := ipv4.NewPacketConn(c)
    80  
    81  	var f ipv4.ICMPFilter
    82  	f.SetAll(true)
    83  	f.Accept(ipv4.ICMPTypeEcho)
    84  	f.Accept(ipv4.ICMPTypeEchoReply)
    85  	if err := p.SetICMPFilter(&f); err != nil {
    86  		t.Fatal(err)
    87  	}
    88  	kf, err := p.ICMPFilter()
    89  	if err != nil {
    90  		t.Fatal(err)
    91  	}
    92  	if !reflect.DeepEqual(kf, &f) {
    93  		t.Fatalf("got %#v; want %#v", kf, f)
    94  	}
    95  }
    96
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