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