github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/pkg/tcpip/network/ipv4/stats_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 ipv4
    16  
    17  import (
    18  	"reflect"
    19  	"testing"
    20  
    21  	"github.com/SagerNet/gvisor/pkg/tcpip"
    22  	"github.com/SagerNet/gvisor/pkg/tcpip/stack"
    23  	"github.com/SagerNet/gvisor/pkg/tcpip/testutil"
    24  )
    25  
    26  var _ stack.NetworkInterface = (*testInterface)(nil)
    27  
    28  type testInterface struct {
    29  	stack.NetworkInterface
    30  	nicID tcpip.NICID
    31  }
    32  
    33  func (t *testInterface) ID() tcpip.NICID {
    34  	return t.nicID
    35  }
    36  
    37  func knownNICIDs(proto *protocol) []tcpip.NICID {
    38  	var nicIDs []tcpip.NICID
    39  
    40  	for k := range proto.mu.eps {
    41  		nicIDs = append(nicIDs, k)
    42  	}
    43  
    44  	return nicIDs
    45  }
    46  
    47  func TestClearEndpointFromProtocolOnClose(t *testing.T) {
    48  	s := stack.New(stack.Options{
    49  		NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol},
    50  	})
    51  	proto := s.NetworkProtocolInstance(ProtocolNumber).(*protocol)
    52  	nic := testInterface{nicID: 1}
    53  	ep := proto.NewEndpoint(&nic, nil).(*endpoint)
    54  	var nicIDs []tcpip.NICID
    55  
    56  	proto.mu.Lock()
    57  	foundEP, hasEndpointBeforeClose := proto.mu.eps[nic.ID()]
    58  	nicIDs = knownNICIDs(proto)
    59  	proto.mu.Unlock()
    60  
    61  	if !hasEndpointBeforeClose {
    62  		t.Fatalf("expected to find the nic id %d in the protocol's endpoint map (%v)", nic.ID(), nicIDs)
    63  	}
    64  	if foundEP != ep {
    65  		t.Fatalf("found an incorrect endpoint mapped to nic id %d", nic.ID())
    66  	}
    67  
    68  	ep.Close()
    69  
    70  	proto.mu.Lock()
    71  	_, hasEP := proto.mu.eps[nic.ID()]
    72  	nicIDs = knownNICIDs(proto)
    73  	proto.mu.Unlock()
    74  	if hasEP {
    75  		t.Fatalf("unexpectedly found an endpoint mapped to the nic id %d in the protocol's known nic ids (%v)", nic.ID(), nicIDs)
    76  	}
    77  }
    78  
    79  func TestMultiCounterStatsInitialization(t *testing.T) {
    80  	s := stack.New(stack.Options{
    81  		NetworkProtocols: []stack.NetworkProtocolFactory{NewProtocol},
    82  	})
    83  	proto := s.NetworkProtocolInstance(ProtocolNumber).(*protocol)
    84  	var nic testInterface
    85  	ep := proto.NewEndpoint(&nic, nil).(*endpoint)
    86  	// At this point, the Stack's stats and the NetworkEndpoint's stats are
    87  	// expected to be bound by a MultiCounterStat.
    88  	refStack := s.Stats()
    89  	refEP := ep.stats.localStats
    90  	if err := testutil.ValidateMultiCounterStats(reflect.ValueOf(&ep.stats.ip).Elem(), []reflect.Value{reflect.ValueOf(&refEP.IP).Elem(), reflect.ValueOf(&refStack.IP).Elem()}); err != nil {
    91  		t.Error(err)
    92  	}
    93  	if err := testutil.ValidateMultiCounterStats(reflect.ValueOf(&ep.stats.icmp).Elem(), []reflect.Value{reflect.ValueOf(&refEP.ICMP).Elem(), reflect.ValueOf(&refStack.ICMP.V4).Elem()}); err != nil {
    94  		t.Error(err)
    95  	}
    96  	if err := testutil.ValidateMultiCounterStats(reflect.ValueOf(&ep.stats.igmp).Elem(), []reflect.Value{reflect.ValueOf(&refEP.IGMP).Elem(), reflect.ValueOf(&refStack.IGMP).Elem()}); err != nil {
    97  		t.Error(err)
    98  	}
    99  }