mirror of
https://git.zx2c4.com/wireguard-go
synced 2024-11-15 01:05:15 +01:00
ef8d6804d7
There are more places where we'll need to add it later, when Go 1.18 comes out with support for it in the "net" package. Also, allowedips still uses slices internally, which might be suboptimal. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
143 lines
2.9 KiB
Go
143 lines
2.9 KiB
Go
/* SPDX-License-Identifier: MIT
|
|
*
|
|
* Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved.
|
|
*/
|
|
|
|
package device
|
|
|
|
import (
|
|
"math/rand"
|
|
"net"
|
|
"sort"
|
|
"testing"
|
|
|
|
"golang.zx2c4.com/go118/netip"
|
|
)
|
|
|
|
const (
|
|
NumberOfPeers = 100
|
|
NumberOfPeerRemovals = 4
|
|
NumberOfAddresses = 250
|
|
NumberOfTests = 10000
|
|
)
|
|
|
|
type SlowNode struct {
|
|
peer *Peer
|
|
cidr uint8
|
|
bits []byte
|
|
}
|
|
|
|
type SlowRouter []*SlowNode
|
|
|
|
func (r SlowRouter) Len() int {
|
|
return len(r)
|
|
}
|
|
|
|
func (r SlowRouter) Less(i, j int) bool {
|
|
return r[i].cidr > r[j].cidr
|
|
}
|
|
|
|
func (r SlowRouter) Swap(i, j int) {
|
|
r[i], r[j] = r[j], r[i]
|
|
}
|
|
|
|
func (r SlowRouter) Insert(addr []byte, cidr uint8, peer *Peer) SlowRouter {
|
|
for _, t := range r {
|
|
if t.cidr == cidr && commonBits(t.bits, addr) >= cidr {
|
|
t.peer = peer
|
|
t.bits = addr
|
|
return r
|
|
}
|
|
}
|
|
r = append(r, &SlowNode{
|
|
cidr: cidr,
|
|
bits: addr,
|
|
peer: peer,
|
|
})
|
|
sort.Sort(r)
|
|
return r
|
|
}
|
|
|
|
func (r SlowRouter) Lookup(addr []byte) *Peer {
|
|
for _, t := range r {
|
|
common := commonBits(t.bits, addr)
|
|
if common >= t.cidr {
|
|
return t.peer
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (r SlowRouter) RemoveByPeer(peer *Peer) SlowRouter {
|
|
n := 0
|
|
for _, x := range r {
|
|
if x.peer != peer {
|
|
r[n] = x
|
|
n++
|
|
}
|
|
}
|
|
return r[:n]
|
|
}
|
|
|
|
func TestTrieRandom(t *testing.T) {
|
|
var slow4, slow6 SlowRouter
|
|
var peers []*Peer
|
|
var allowedIPs AllowedIPs
|
|
|
|
rand.Seed(1)
|
|
|
|
for n := 0; n < NumberOfPeers; n++ {
|
|
peers = append(peers, &Peer{})
|
|
}
|
|
|
|
for n := 0; n < NumberOfAddresses; n++ {
|
|
var addr4 [4]byte
|
|
rand.Read(addr4[:])
|
|
cidr := uint8(rand.Intn(32) + 1)
|
|
index := rand.Intn(NumberOfPeers)
|
|
allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom4(addr4), int(cidr)), peers[index])
|
|
slow4 = slow4.Insert(addr4[:], cidr, peers[index])
|
|
|
|
var addr6 [16]byte
|
|
rand.Read(addr6[:])
|
|
cidr = uint8(rand.Intn(128) + 1)
|
|
index = rand.Intn(NumberOfPeers)
|
|
allowedIPs.Insert(netip.PrefixFrom(netip.AddrFrom16(addr6), int(cidr)), peers[index])
|
|
slow6 = slow6.Insert(addr6[:], cidr, peers[index])
|
|
}
|
|
|
|
var p int
|
|
for p = 0; ; p++ {
|
|
for n := 0; n < NumberOfTests; n++ {
|
|
var addr4 [4]byte
|
|
rand.Read(addr4[:])
|
|
peer1 := slow4.Lookup(addr4[:])
|
|
peer2 := allowedIPs.Lookup(addr4[:])
|
|
if peer1 != peer2 {
|
|
t.Errorf("Trie did not match naive implementation, for %v: want %p, got %p", net.IP(addr4[:]), peer1, peer2)
|
|
}
|
|
|
|
var addr6 [16]byte
|
|
rand.Read(addr6[:])
|
|
peer1 = slow6.Lookup(addr6[:])
|
|
peer2 = allowedIPs.Lookup(addr6[:])
|
|
if peer1 != peer2 {
|
|
t.Errorf("Trie did not match naive implementation, for %v: want %p, got %p", net.IP(addr6[:]), peer1, peer2)
|
|
}
|
|
}
|
|
if p >= len(peers) || p >= NumberOfPeerRemovals {
|
|
break
|
|
}
|
|
allowedIPs.RemoveByPeer(peers[p])
|
|
slow4 = slow4.RemoveByPeer(peers[p])
|
|
slow6 = slow6.RemoveByPeer(peers[p])
|
|
}
|
|
for ; p < len(peers); p++ {
|
|
allowedIPs.RemoveByPeer(peers[p])
|
|
}
|
|
|
|
if allowedIPs.IPv4 != nil || allowedIPs.IPv6 != nil {
|
|
t.Error("Failed to remove all nodes from trie by peer")
|
|
}
|
|
}
|