Merge branch 'dev' of https://github.com/Dreamacro/clash into Alpha

component/fakeip/memory.go

@@ -73,7 +73,7 @@ func (m *memoryStore) FlushFakeIP() error {
 
 func newMemoryStore(size int) *memoryStore {
 	return &memoryStore{
-		cacheIP:   cache.NewLRUCache[string, netip.Addr](cache.WithSize[string, netip.Addr](size)),
-		cacheHost: cache.NewLRUCache[netip.Addr, string](cache.WithSize[netip.Addr, string](size)),
+		cacheIP:   cache.New[string, netip.Addr](cache.WithSize[string, netip.Addr](size)),
+		cacheHost: cache.New[netip.Addr, string](cache.WithSize[netip.Addr, string](size)),
 	}
 }

component/fakeip/pool.go

@@ -3,6 +3,7 @@ package fakeip
 import (
 	"errors"
 	"net/netip"
+	"strings"
 	"sync"
 
 	"github.com/Dreamacro/clash/common/nnip"
@@ -26,7 +27,7 @@ type store interface {
 	FlushFakeIP() error
 }
 
-// Pool is a implementation about fake ip generator without storage
+// Pool is an implementation about fake ip generator without storage
 type Pool struct {
 	gateway netip.Addr
 	first   netip.Addr
@@ -43,6 +44,9 @@ type Pool struct {
 func (p *Pool) Lookup(host string) netip.Addr {
 	p.mux.Lock()
 	defer p.mux.Unlock()
+
+	// RFC4343: DNS Case Insensitive, we SHOULD return result with all cases.
+	host = strings.ToLower(host)
 	if ip, exist := p.store.GetByHost(host); exist {
 		return ip
 	}

component/fakeip/pool_test.go

@@ -104,6 +104,27 @@ func TestPool_BasicV6(t *testing.T) {
 	}
 }
 
+func TestPool_Case_Insensitive(t *testing.T) {
+	ipnet := netip.MustParsePrefix("192.168.0.1/29")
+	pools, tempfile, err := createPools(Options{
+		IPNet: &ipnet,
+		Size:  10,
+	})
+	assert.Nil(t, err)
+	defer os.Remove(tempfile)
+
+	for _, pool := range pools {
+		first := pool.Lookup("foo.com")
+		last := pool.Lookup("Foo.Com")
+		foo, exist := pool.LookBack(last)
+
+		assert.Equal(t, first, pool.Lookup("Foo.Com"))
+		assert.Equal(t, pool.Lookup("fOo.cOM"), first)
+		assert.True(t, exist)
+		assert.Equal(t, foo, "foo.com")
+	}
+}
+
 func TestPool_CycleUsed(t *testing.T) {
 	ipnet := netip.MustParsePrefix("192.168.0.16/28")
 	pools, tempfile, err := createPools(Options{