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/* SPDX-License-Identifier: MIT
*
* Copyright (C) 2017-2022 WireGuard LLC. All Rights Reserved.
*/
package device
import (
"math/rand"
"net"
"net/netip"
"testing"
)
type testPairCommonBits struct {
s1 []byte
s2 []byte
match uint8
}
func TestCommonBits(t *testing.T) {
tests := []testPairCommonBits{
{s1: []byte{1, 4, 53, 128}, s2: []byte{0, 0, 0, 0}, match: 7},
{s1: []byte{0, 4, 53, 128}, s2: []byte{0, 0, 0, 0}, match: 13},
{s1: []byte{0, 4, 53, 253}, s2: []byte{0, 4, 53, 252}, match: 31},
{s1: []byte{192, 168, 1, 1}, s2: []byte{192, 169, 1, 1}, match: 15},
{s1: []byte{65, 168, 1, 1}, s2: []byte{192, 169, 1, 1}, match: 0},
}
for _, p := range tests {
v := commonBits(p.s1, p.s2)
if v != p.match {
t.Error(
"For slice", p.s1, p.s2,
"expected match", p.match,
",but got", v,
)
}
}
}
func benchmarkTrie(peerNumber, addressNumber, addressLength int, b *testing.B) {
var trie *trieEntry
var peers []*Peer
root := parentIndirection{&trie, 2}
rand.Seed(1)
const AddressLength = 4
for n := 0; n < peerNumber; n++ {
peers = append(peers, &Peer{})
}
for n := 0; n < addressNumber; n++ {
var addr [AddressLength]byte
rand.Read(addr[:])
cidr := uint8(rand.Uint32() % (AddressLength * 8))
index := rand.Int() % peerNumber
root.insert(addr[:], cidr, peers[index])
}
for n := 0; n < b.N; n++ {
var addr [AddressLength]byte
rand.Read(addr[:])
trie.lookup(addr[:])
}
}
func BenchmarkTrieIPv4Peers100Addresses1000(b *testing.B) {
benchmarkTrie(100, 1000, net.IPv4len, b)
}
func BenchmarkTrieIPv4Peers10Addresses10(b *testing.B) {
benchmarkTrie(10, 10, net.IPv4len, b)
}
func BenchmarkTrieIPv6Peers100Addresses1000(b *testing.B) {
benchmarkTrie(100, 1000, net.IPv6len, b)
}
func BenchmarkTrieIPv6Peers10Addresses10(b *testing.B) {
benchmarkTrie(10, 10, net.IPv6len, b)
}
/* Test ported from kernel implementation:
* selftest/allowedips.h
*/
func TestTrieIPv4(t *testing.T) {
a := &Peer{}
b := &Peer{}
c := &Peer{}
d := &Peer{}
e := &Peer{}
g := &Peer{}
h := &Peer{}
var allowedIPs AllowedIPs
insert := func(peer *Peer, a, b, c, d byte, cidr uint8) {
allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom4([4]byte{a, b, c, d}), int(cidr)), peer)
}
assertEQ := func(peer *Peer, a, b, c, d byte) {
p := allowedIPs.Lookup([]byte{a, b, c, d})
if p != peer {
t.Error("Assert EQ failed")
}
}
assertNEQ := func(peer *Peer, a, b, c, d byte) {
p := allowedIPs.Lookup([]byte{a, b, c, d})
if p == peer {
t.Error("Assert NEQ failed")
}
}
insert(a, 192, 168, 4, 0, 24)
insert(b, 192, 168, 4, 4, 32)
insert(c, 192, 168, 0, 0, 16)
insert(d, 192, 95, 5, 64, 27)
insert(c, 192, 95, 5, 65, 27)
insert(e, 0, 0, 0, 0, 0)
insert(g, 64, 15, 112, 0, 20)
insert(h, 64, 15, 123, 211, 25)
insert(a, 10, 0, 0, 0, 25)
insert(b, 10, 0, 0, 128, 25)
insert(a, 10, 1, 0, 0, 30)
insert(b, 10, 1, 0, 4, 30)
insert(c, 10, 1, 0, 8, 29)
insert(d, 10, 1, 0, 16, 29)
assertEQ(a, 192, 168, 4, 20)
assertEQ(a, 192, 168, 4, 0)
assertEQ(b, 192, 168, 4, 4)
assertEQ(c, 192, 168, 200, 182)
assertEQ(c, 192, 95, 5, 68)
assertEQ(e, 192, 95, 5, 96)
assertEQ(g, 64, 15, 116, 26)
assertEQ(g, 64, 15, 127, 3)
insert(a, 1, 0, 0, 0, 32)
insert(a, 64, 0, 0, 0, 32)
insert(a, 128, 0, 0, 0, 32)
insert(a, 192, 0, 0, 0, 32)
insert(a, 255, 0, 0, 0, 32)
assertEQ(a, 1, 0, 0, 0)
assertEQ(a, 64, 0, 0, 0)
assertEQ(a, 128, 0, 0, 0)
assertEQ(a, 192, 0, 0, 0)
assertEQ(a, 255, 0, 0, 0)
allowedIPs.RemoveByPeer(a)
assertNEQ(a, 1, 0, 0, 0)
assertNEQ(a, 64, 0, 0, 0)
assertNEQ(a, 128, 0, 0, 0)
assertNEQ(a, 192, 0, 0, 0)
assertNEQ(a, 255, 0, 0, 0)
allowedIPs.RemoveByPeer(a)
allowedIPs.RemoveByPeer(b)
allowedIPs.RemoveByPeer(c)
allowedIPs.RemoveByPeer(d)
allowedIPs.RemoveByPeer(e)
allowedIPs.RemoveByPeer(g)
allowedIPs.RemoveByPeer(h)
if allowedIPs.IPv4 != nil || allowedIPs.IPv6 != nil {
t.Error("Expected removing all the peers to empty trie, but it did not")
}
insert(a, 192, 168, 0, 0, 16)
insert(a, 192, 168, 0, 0, 24)
allowedIPs.RemoveByPeer(a)
assertNEQ(a, 192, 168, 0, 1)
}
/* Test ported from kernel implementation:
* selftest/allowedips.h
*/
func TestTrieIPv6(t *testing.T) {
a := &Peer{}
b := &Peer{}
c := &Peer{}
d := &Peer{}
e := &Peer{}
f := &Peer{}
g := &Peer{}
h := &Peer{}
var allowedIPs AllowedIPs
expand := func(a uint32) []byte {
var out [4]byte
out[0] = byte(a >> 24 & 0xff)
out[1] = byte(a >> 16 & 0xff)
out[2] = byte(a >> 8 & 0xff)
out[3] = byte(a & 0xff)
return out[:]
}
insert := func(peer *Peer, a, b, c, d uint32, cidr uint8) {
var addr []byte
addr = append(addr, expand(a)...)
addr = append(addr, expand(b)...)
addr = append(addr, expand(c)...)
addr = append(addr, expand(d)...)
allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom16(*(*[16]byte)(addr)), int(cidr)), peer)
}
assertEQ := func(peer *Peer, a, b, c, d uint32) {
var addr []byte
addr = append(addr, expand(a)...)
addr = append(addr, expand(b)...)
addr = append(addr, expand(c)...)
addr = append(addr, expand(d)...)
p := allowedIPs.Lookup(addr)
if p != peer {
t.Error("Assert EQ failed")
}
}
insert(d, 0x26075300, 0x60006b00, 0, 0xc05f0543, 128)
insert(c, 0x26075300, 0x60006b00, 0, 0, 64)
insert(e, 0, 0, 0, 0, 0)
insert(f, 0, 0, 0, 0, 0)
insert(g, 0x24046800, 0, 0, 0, 32)
insert(h, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef, 64)
insert(a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef, 128)
insert(c, 0x24446800, 0x40e40800, 0xdeaebeef, 0xdefbeef, 128)
insert(b, 0x24446800, 0xf0e40800, 0xeeaebeef, 0, 98)
assertEQ(d, 0x26075300, 0x60006b00, 0, 0xc05f0543)
assertEQ(c, 0x26075300, 0x60006b00, 0, 0xc02e01ee)
assertEQ(f, 0x26075300, 0x60006b01, 0, 0)
assertEQ(g, 0x24046800, 0x40040806, 0, 0x1006)
assertEQ(g, 0x24046800, 0x40040806, 0x1234, 0x5678)
assertEQ(f, 0x240467ff, 0x40040806, 0x1234, 0x5678)
assertEQ(f, 0x24046801, 0x40040806, 0x1234, 0x5678)
assertEQ(h, 0x24046800, 0x40040800, 0x1234, 0x5678)
assertEQ(h, 0x24046800, 0x40040800, 0, 0)
assertEQ(h, 0x24046800, 0x40040800, 0x10101010, 0x10101010)
assertEQ(a, 0x24046800, 0x40040800, 0xdeadbeef, 0xdeadbeef)
}
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