github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/tcpip/header/mld_test.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package header
    16  
    17  import (
    18  	"encoding/binary"
    19  	"testing"
    20  	"time"
    21  
    22  	"github.com/SagerNet/gvisor/pkg/tcpip"
    23  )
    24  
    25  func TestMLD(t *testing.T) {
    26  	b := []byte{
    27  		// Maximum Response Delay
    28  		0, 0,
    29  
    30  		// Reserved
    31  		0, 0,
    32  
    33  		// MulticastAddress
    34  		1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6,
    35  	}
    36  
    37  	const maxRespDelay = 513
    38  	binary.BigEndian.PutUint16(b, maxRespDelay)
    39  
    40  	mld := MLD(b)
    41  
    42  	if got, want := mld.MaximumResponseDelay(), maxRespDelay*time.Millisecond; got != want {
    43  		t.Errorf("got mld.MaximumResponseDelay() = %s, want = %s", got, want)
    44  	}
    45  
    46  	const newMaxRespDelay = 1234
    47  	mld.SetMaximumResponseDelay(newMaxRespDelay)
    48  	if got, want := mld.MaximumResponseDelay(), newMaxRespDelay*time.Millisecond; got != want {
    49  		t.Errorf("got mld.MaximumResponseDelay() = %s, want = %s", got, want)
    50  	}
    51  
    52  	if got, want := mld.MulticastAddress(), tcpip.Address([]byte{1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6}); got != want {
    53  		t.Errorf("got mld.MulticastAddress() = %s, want = %s", got, want)
    54  	}
    55  
    56  	multicastAddress := tcpip.Address([]byte{15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0})
    57  	mld.SetMulticastAddress(multicastAddress)
    58  	if got := mld.MulticastAddress(); got != multicastAddress {
    59  		t.Errorf("got mld.MulticastAddress() = %s, want = %s", got, multicastAddress)
    60  	}
    61  }