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Fix: satisfy RFC4343 - DNS case insensitivity (#2260)

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bobo liu 2022-08-12 13:47:51 +08:00 committed by GitHub
parent 50105f0559
commit 71cad51e8f
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2 changed files with 25 additions and 0 deletions
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4
component/fakeip/pool.go
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@ -3,6 +3,7 @@ package fakeip
import (
"errors"
"net"
"strings"
"sync"
"github.com/Dreamacro/clash/common/cache"
@ -36,6 +37,9 @@ type Pool struct {
func (p *Pool) Lookup(host string) net.IP {
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
}

21
component/fakeip/pool_test.go
View file

@ -75,6 +75,27 @@ func TestPool_Basic(t *testing.T) {
}
}
func TestPool_Case_Insensitive(t *testing.T) {
_, ipnet, _ := net.ParseCIDR("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.True(t, first.Equal(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, _ := net.ParseCIDR("192.168.0.1/29")
pools, tempfile, err := createPools(Options{