218 lines
5.3 KiB
Go
218 lines
5.3 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tcpip
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import (
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"fmt"
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"net"
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"strings"
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"testing"
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)
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func TestSubnetContains(t *testing.T) {
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tests := []struct {
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s Address
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m AddressMask
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a Address
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want bool
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}{
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{"\xa0", "\xf0", "\x90", false},
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{"\xa0", "\xf0", "\xa0", true},
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{"\xa0", "\xf0", "\xa5", true},
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{"\xa0", "\xf0", "\xaf", true},
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{"\xa0", "\xf0", "\xb0", false},
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{"\xa0", "\xf0", "", false},
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{"\xa0", "\xf0", "\xa0\x00", false},
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{"\xc2\x80", "\xff\xf0", "\xc2\x80", true},
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{"\xc2\x80", "\xff\xf0", "\xc2\x00", false},
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{"\xc2\x00", "\xff\xf0", "\xc2\x00", true},
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{"\xc2\x00", "\xff\xf0", "\xc2\x80", false},
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}
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for _, tt := range tests {
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s, err := NewSubnet(tt.s, tt.m)
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if err != nil {
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t.Errorf("NewSubnet(%v, %v) = %v", tt.s, tt.m, err)
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continue
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}
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if got := s.Contains(tt.a); got != tt.want {
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t.Errorf("Subnet(%v).Contains(%v) = %v, want %v", s, tt.a, got, tt.want)
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}
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}
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}
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func TestSubnetBits(t *testing.T) {
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tests := []struct {
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a AddressMask
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want1 int
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want0 int
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}{
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{"\x00", 0, 8},
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{"\x00\x00", 0, 16},
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{"\x36", 4, 4},
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{"\x5c", 4, 4},
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{"\x5c\x5c", 8, 8},
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{"\x5c\x36", 8, 8},
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{"\x36\x5c", 8, 8},
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{"\x36\x36", 8, 8},
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{"\xff", 8, 0},
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{"\xff\xff", 16, 0},
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}
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for _, tt := range tests {
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s := &Subnet{mask: tt.a}
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got1, got0 := s.Bits()
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if got1 != tt.want1 || got0 != tt.want0 {
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t.Errorf("Subnet{mask: %x}.Bits() = %d, %d, want %d, %d", tt.a, got1, got0, tt.want1, tt.want0)
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}
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}
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}
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func TestSubnetPrefix(t *testing.T) {
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tests := []struct {
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a AddressMask
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want int
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}{
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{"\x00", 0},
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{"\x00\x00", 0},
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{"\x36", 0},
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{"\x86", 1},
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{"\xc5", 2},
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{"\xff\x00", 8},
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{"\xff\x36", 8},
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{"\xff\x8c", 9},
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{"\xff\xc8", 10},
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{"\xff", 8},
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{"\xff\xff", 16},
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}
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for _, tt := range tests {
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s := &Subnet{mask: tt.a}
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got := s.Prefix()
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if got != tt.want {
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t.Errorf("Subnet{mask: %x}.Bits() = %d want %d", tt.a, got, tt.want)
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}
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}
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}
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func TestSubnetCreation(t *testing.T) {
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tests := []struct {
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a Address
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m AddressMask
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want error
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}{
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{"\xa0", "\xf0", nil},
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{"\xa0\xa0", "\xf0", errSubnetLengthMismatch},
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{"\xaa", "\xf0", errSubnetAddressMasked},
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{"", "", nil},
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}
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for _, tt := range tests {
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if _, err := NewSubnet(tt.a, tt.m); err != tt.want {
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t.Errorf("NewSubnet(%v, %v) = %v, want %v", tt.a, tt.m, err, tt.want)
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}
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}
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}
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func TestRouteMatch(t *testing.T) {
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tests := []struct {
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d Address
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m AddressMask
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a Address
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want bool
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}{
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{"\xc2\x80", "\xff\xf0", "\xc2\x80", true},
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{"\xc2\x80", "\xff\xf0", "\xc2\x00", false},
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{"\xc2\x00", "\xff\xf0", "\xc2\x00", true},
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{"\xc2\x00", "\xff\xf0", "\xc2\x80", false},
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}
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for _, tt := range tests {
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r := Route{Destination: tt.d, Mask: tt.m}
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if got := r.Match(tt.a); got != tt.want {
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t.Errorf("Route(%v).Match(%v) = %v, want %v", r, tt.a, got, tt.want)
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}
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}
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}
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func TestAddressString(t *testing.T) {
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for _, want := range []string{
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// Taken from stdlib.
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"2001:db8::123:12:1",
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"2001:db8::1",
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"2001:db8:0:1:0:1:0:1",
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"2001:db8:1:0:1:0:1:0",
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"2001::1:0:0:1",
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"2001:db8:0:0:1::",
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"2001:db8::1:0:0:1",
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"2001:db8::a:b:c:d",
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// Leading zeros.
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"::1",
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// Trailing zeros.
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"8::",
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// No zeros.
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"1:1:1:1:1:1:1:1",
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// Longer sequence is after other zeros, but not at the end.
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"1:0:0:1::1",
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// Longer sequence is at the beginning, shorter sequence is at
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// the end.
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"::1:1:1:0:0",
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// Longer sequence is not at the beginning, shorter sequence is
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// at the end.
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"1::1:1:0:0",
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// Longer sequence is at the beginning, shorter sequence is not
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// at the end.
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"::1:1:0:0:1",
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// Neither sequence is at an end, longer is after shorter.
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"1:0:0:1::1",
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// Shorter sequence is at the beginning, longer sequence is not
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// at the end.
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"0:0:1:1::1",
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// Shorter sequence is at the beginning, longer sequence is at
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// the end.
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"0:0:1:1:1::",
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// Short sequences at both ends, longer one in the middle.
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"0:1:1::1:1:0",
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// Short sequences at both ends, longer one in the middle.
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"0:1::1:0:0",
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// Short sequences at both ends, longer one in the middle.
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"0:0:1::1:0",
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// Longer sequence surrounded by shorter sequences, but none at
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// the end.
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"1:0:1::1:0:1",
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} {
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addr := Address(net.ParseIP(want))
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if got := addr.String(); got != want {
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t.Errorf("Address(%x).String() = '%s', want = '%s'", addr, got, want)
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}
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}
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}
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func TestStatsString(t *testing.T) {
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got := fmt.Sprintf("%+v", Stats{}.FillIn())
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matchers := []string{
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// Print root-level stats correctly.
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"UnknownProtocolRcvdPackets:0",
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// Print protocol-specific stats correctly.
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"TCP:{ActiveConnectionOpenings:0",
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}
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for _, m := range matchers {
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if !strings.Contains(got, m) {
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t.Errorf("string.Contains(got, %q) = false", m)
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}
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}
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if t.Failed() {
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t.Logf(`got = fmt.Sprintf("%%+v", Stats{}.FillIn()) = %q`, got)
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}
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}
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