603 lines
18 KiB
Go
603 lines
18 KiB
Go
package dnsfilter
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import (
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"fmt"
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"net"
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"net/http"
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"net/http/httptest"
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"path"
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"runtime"
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"testing"
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"time"
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"github.com/AdguardTeam/urlfilter"
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"github.com/bluele/gcache"
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"github.com/miekg/dns"
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"github.com/stretchr/testify/assert"
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)
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// HELPERS
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// SAFE BROWSING
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// SAFE SEARCH
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// PARENTAL
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// FILTERING
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// CLIENTS SETTINGS
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// BENCHMARKS
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// HELPERS
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func purgeCaches() {
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if gctx.safebrowsingCache != nil {
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gctx.safebrowsingCache.Reset()
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}
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if gctx.parentalCache != nil {
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gctx.parentalCache.Reset()
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}
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if gctx.safeSearchCache != nil {
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gctx.safeSearchCache.Reset()
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}
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}
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func _Func() string {
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pc := make([]uintptr, 10) // at least 1 entry needed
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runtime.Callers(2, pc)
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f := runtime.FuncForPC(pc[0])
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return path.Base(f.Name())
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}
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func NewForTest(c *Config, filters map[int]string) *Dnsfilter {
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if c != nil {
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c.SafeBrowsingCacheSize = 1024
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c.SafeSearchCacheSize = 1024
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c.ParentalCacheSize = 1024
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}
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d := New(c, filters)
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purgeCaches()
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return d
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}
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func (d *Dnsfilter) checkMatch(t *testing.T, hostname string) {
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t.Helper()
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ret, err := d.CheckHost(hostname, dns.TypeA, "")
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if err != nil {
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t.Errorf("Error while matching host %s: %s", hostname, err)
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}
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if !ret.IsFiltered {
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t.Errorf("Expected hostname %s to match", hostname)
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}
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}
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func (d *Dnsfilter) checkMatchIP(t *testing.T, hostname string, ip string, qtype uint16) {
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t.Helper()
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ret, err := d.CheckHost(hostname, qtype, "")
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if err != nil {
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t.Errorf("Error while matching host %s: %s", hostname, err)
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}
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if !ret.IsFiltered {
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t.Errorf("Expected hostname %s to match", hostname)
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}
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if ret.IP == nil || ret.IP.String() != ip {
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t.Errorf("Expected ip %s to match, actual: %v", ip, ret.IP)
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}
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}
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func (d *Dnsfilter) checkMatchEmpty(t *testing.T, hostname string) {
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t.Helper()
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ret, err := d.CheckHost(hostname, dns.TypeA, "")
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if err != nil {
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t.Errorf("Error while matching host %s: %s", hostname, err)
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}
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if ret.IsFiltered {
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t.Errorf("Expected hostname %s to not match", hostname)
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}
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}
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func TestEtcHostsMatching(t *testing.T) {
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addr := "216.239.38.120"
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addr6 := "::1"
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text := fmt.Sprintf(" %s google.com www.google.com # enforce google's safesearch \n%s google.com\n0.0.0.0 block.com\n",
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addr, addr6)
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filters := make(map[int]string)
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filters[0] = text
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d := NewForTest(nil, filters)
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defer d.Destroy()
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d.checkMatchIP(t, "google.com", addr, dns.TypeA)
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d.checkMatchIP(t, "www.google.com", addr, dns.TypeA)
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d.checkMatchEmpty(t, "subdomain.google.com")
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d.checkMatchEmpty(t, "example.org")
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// IPv6 address
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d.checkMatchIP(t, "google.com", addr6, dns.TypeAAAA)
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// block both IPv4 and IPv6
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d.checkMatchIP(t, "block.com", "0.0.0.0", dns.TypeA)
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d.checkMatchIP(t, "block.com", "::", dns.TypeAAAA)
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}
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// SAFE BROWSING
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func TestSafeBrowsing(t *testing.T) {
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testCases := []string{
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"",
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"sb.adtidy.org",
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}
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for _, tc := range testCases {
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t.Run(fmt.Sprintf("%s in %s", tc, _Func()), func(t *testing.T) {
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d := NewForTest(&Config{SafeBrowsingEnabled: true}, nil)
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defer d.Destroy()
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gctx.stats.Safebrowsing.Requests = 0
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d.checkMatch(t, "wmconvirus.narod.ru")
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d.checkMatch(t, "wmconvirus.narod.ru")
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if gctx.stats.Safebrowsing.Requests != 1 {
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t.Errorf("Safebrowsing lookup positive cache is not working: %v", gctx.stats.Safebrowsing.Requests)
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}
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d.checkMatch(t, "WMconvirus.narod.ru")
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if gctx.stats.Safebrowsing.Requests != 1 {
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t.Errorf("Safebrowsing lookup positive cache is not working: %v", gctx.stats.Safebrowsing.Requests)
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}
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d.checkMatch(t, "wmconvirus.narod.ru.")
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d.checkMatch(t, "test.wmconvirus.narod.ru")
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d.checkMatch(t, "test.wmconvirus.narod.ru.")
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d.checkMatchEmpty(t, "yandex.ru")
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d.checkMatchEmpty(t, "pornhub.com")
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l := gctx.stats.Safebrowsing.Requests
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d.checkMatchEmpty(t, "pornhub.com")
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if gctx.stats.Safebrowsing.Requests != l {
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t.Errorf("Safebrowsing lookup negative cache is not working: %v", gctx.stats.Safebrowsing.Requests)
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}
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})
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}
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}
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func TestParallelSB(t *testing.T) {
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d := NewForTest(&Config{SafeBrowsingEnabled: true}, nil)
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defer d.Destroy()
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t.Run("group", func(t *testing.T) {
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for i := 0; i < 100; i++ {
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t.Run(fmt.Sprintf("aaa%d", i), func(t *testing.T) {
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t.Parallel()
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d.checkMatch(t, "wmconvirus.narod.ru")
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d.checkMatch(t, "wmconvirus.narod.ru.")
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d.checkMatch(t, "test.wmconvirus.narod.ru")
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d.checkMatch(t, "test.wmconvirus.narod.ru.")
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d.checkMatchEmpty(t, "yandex.ru")
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d.checkMatchEmpty(t, "pornhub.com")
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})
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}
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})
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}
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// the only way to verify that custom server option is working is to point it at a server that does serve safebrowsing
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func TestSafeBrowsingCustomServerFail(t *testing.T) {
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d := NewForTest(&Config{SafeBrowsingEnabled: true}, nil)
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defer d.Destroy()
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ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// w.Write("Hello, client")
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fmt.Fprintln(w, "Hello, client")
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}))
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defer ts.Close()
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address := ts.Listener.Addr().String()
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d.SetHTTPTimeout(time.Second * 5)
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d.SetSafeBrowsingServer(address) // this will ensure that test fails
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d.checkMatchEmpty(t, "wmconvirus.narod.ru")
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}
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// SAFE SEARCH
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func TestSafeSearch(t *testing.T) {
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d := NewForTest(nil, nil)
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defer d.Destroy()
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_, ok := d.SafeSearchDomain("www.google.com")
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if ok {
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t.Errorf("Expected safesearch to error when disabled")
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}
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d = NewForTest(&Config{SafeSearchEnabled: true}, nil)
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defer d.Destroy()
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val, ok := d.SafeSearchDomain("www.google.com")
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if !ok {
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t.Errorf("Expected safesearch to find result for www.google.com")
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}
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if val != "forcesafesearch.google.com" {
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t.Errorf("Expected safesearch for google.com to be forcesafesearch.google.com")
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}
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}
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func TestCheckHostSafeSearchYandex(t *testing.T) {
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d := NewForTest(&Config{SafeSearchEnabled: true}, nil)
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defer d.Destroy()
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// Slice of yandex domains
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yandex := []string{"yAndeX.ru", "YANdex.COM", "yandex.ua", "yandex.by", "yandex.kz", "www.yandex.com"}
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// Check host for each domain
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for _, host := range yandex {
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result, err := d.CheckHost(host, dns.TypeA, "")
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if err != nil {
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t.Errorf("SafeSearch doesn't work for yandex domain `%s` cause %s", host, err)
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}
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if result.IP.String() != "213.180.193.56" {
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t.Errorf("SafeSearch doesn't work for yandex domain `%s`", host)
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}
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}
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}
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func TestCheckHostSafeSearchGoogle(t *testing.T) {
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d := NewForTest(&Config{SafeSearchEnabled: true}, nil)
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defer d.Destroy()
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// Slice of google domains
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googleDomains := []string{"www.google.com", "www.google.im", "www.google.co.in", "www.google.iq", "www.google.is", "www.google.it", "www.google.je"}
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// Check host for each domain
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for _, host := range googleDomains {
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result, err := d.CheckHost(host, dns.TypeA, "")
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if err != nil {
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t.Errorf("SafeSearch doesn't work for %s cause %s", host, err)
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}
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if result.IP == nil {
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t.Errorf("SafeSearch doesn't work for %s", host)
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}
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}
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}
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func TestSafeSearchCacheYandex(t *testing.T) {
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d := NewForTest(nil, nil)
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defer d.Destroy()
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domain := "yandex.ru"
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var result Result
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var err error
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// Check host with disabled safesearch
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result, err = d.CheckHost(domain, dns.TypeA, "")
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if err != nil {
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t.Fatalf("Cannot check host due to %s", err)
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}
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if result.IP != nil {
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t.Fatalf("SafeSearch is not enabled but there is an answer for `%s` !", domain)
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}
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d = NewForTest(&Config{SafeSearchEnabled: true}, nil)
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defer d.Destroy()
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result, err = d.CheckHost(domain, dns.TypeA, "")
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if err != nil {
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t.Fatalf("CheckHost for safesearh domain %s failed cause %s", domain, err)
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}
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// Fir yandex we already know valid ip
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if result.IP.String() != "213.180.193.56" {
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t.Fatalf("Wrong IP for %s safesearch: %s", domain, result.IP.String())
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}
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// Check cache
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cachedValue, isFound := getCachedResult(gctx.safeSearchCache, domain)
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if !isFound {
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t.Fatalf("Safesearch cache doesn't work for %s!", domain)
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}
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if cachedValue.IP.String() != "213.180.193.56" {
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t.Fatalf("Wrong IP in cache for %s safesearch: %s", domain, cachedValue.IP.String())
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}
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}
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func TestSafeSearchCacheGoogle(t *testing.T) {
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d := NewForTest(nil, nil)
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defer d.Destroy()
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domain := "www.google.ru"
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result, err := d.CheckHost(domain, dns.TypeA, "")
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if err != nil {
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t.Fatalf("Cannot check host due to %s", err)
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}
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if result.IP != nil {
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t.Fatalf("SafeSearch is not enabled but there is an answer!")
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}
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d = NewForTest(&Config{SafeSearchEnabled: true}, nil)
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defer d.Destroy()
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// Let's lookup for safesearch domain
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safeDomain, ok := d.SafeSearchDomain(domain)
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if !ok {
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t.Fatalf("Failed to get safesearch domain for %s", domain)
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}
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ips, err := net.LookupIP(safeDomain)
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if err != nil {
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t.Fatalf("Failed to lookup for %s", safeDomain)
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}
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t.Logf("IP addresses: %v", ips)
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ip := ips[0]
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for _, i := range ips {
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if i.To4() != nil {
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ip = i
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break
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}
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}
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result, err = d.CheckHost(domain, dns.TypeA, "")
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if err != nil {
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t.Fatalf("CheckHost for safesearh domain %s failed cause %s", domain, err)
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}
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if result.IP.String() != ip.String() {
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t.Fatalf("Wrong IP for %s safesearch: %s. Should be: %s",
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domain, result.IP.String(), ip)
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}
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// Check cache
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cachedValue, isFound := getCachedResult(gctx.safeSearchCache, domain)
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if !isFound {
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t.Fatalf("Safesearch cache doesn't work for %s!", domain)
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}
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if cachedValue.IP.String() != ip.String() {
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t.Fatalf("Wrong IP in cache for %s safesearch: %s", domain, cachedValue.IP.String())
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}
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}
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// PARENTAL
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func TestParentalControl(t *testing.T) {
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d := NewForTest(&Config{ParentalEnabled: true}, nil)
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defer d.Destroy()
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d.ParentalSensitivity = 3
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d.checkMatch(t, "pornhub.com")
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d.checkMatch(t, "pornhub.com")
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if gctx.stats.Parental.Requests != 1 {
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t.Errorf("Parental lookup positive cache is not working")
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}
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d.checkMatch(t, "PORNhub.com")
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if gctx.stats.Parental.Requests != 1 {
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t.Errorf("Parental lookup positive cache is not working")
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}
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d.checkMatch(t, "www.pornhub.com")
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d.checkMatch(t, "pornhub.com.")
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d.checkMatch(t, "www.pornhub.com.")
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d.checkMatchEmpty(t, "www.yandex.ru")
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d.checkMatchEmpty(t, "yandex.ru")
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l := gctx.stats.Parental.Requests
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d.checkMatchEmpty(t, "yandex.ru")
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if gctx.stats.Parental.Requests != l {
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t.Errorf("Parental lookup negative cache is not working")
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}
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d.checkMatchEmpty(t, "api.jquery.com")
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}
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// FILTERING
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var blockingRules = "||example.org^\n"
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var whitelistRules = "||example.org^\n@@||test.example.org\n"
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var importantRules = "@@||example.org^\n||test.example.org^$important\n"
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var regexRules = "/example\\.org/\n@@||test.example.org^\n"
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var maskRules = "test*.example.org^\nexam*.com\n"
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var tests = []struct {
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testname string
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rules string
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hostname string
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isFiltered bool
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reason Reason
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}{
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{"sanity", "||doubleclick.net^", "www.doubleclick.net", true, FilteredBlackList},
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{"sanity", "||doubleclick.net^", "nodoubleclick.net", false, NotFilteredNotFound},
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{"sanity", "||doubleclick.net^", "doubleclick.net.ru", false, NotFilteredNotFound},
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{"sanity", "||doubleclick.net^", "wmconvirus.narod.ru", false, NotFilteredNotFound},
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{"blocking", blockingRules, "example.org", true, FilteredBlackList},
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{"blocking", blockingRules, "test.example.org", true, FilteredBlackList},
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{"blocking", blockingRules, "test.test.example.org", true, FilteredBlackList},
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{"blocking", blockingRules, "testexample.org", false, NotFilteredNotFound},
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{"blocking", blockingRules, "onemoreexample.org", false, NotFilteredNotFound},
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{"whitelist", whitelistRules, "example.org", true, FilteredBlackList},
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{"whitelist", whitelistRules, "test.example.org", false, NotFilteredWhiteList},
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{"whitelist", whitelistRules, "test.test.example.org", false, NotFilteredWhiteList},
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{"whitelist", whitelistRules, "testexample.org", false, NotFilteredNotFound},
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{"whitelist", whitelistRules, "onemoreexample.org", false, NotFilteredNotFound},
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{"important", importantRules, "example.org", false, NotFilteredWhiteList},
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{"important", importantRules, "test.example.org", true, FilteredBlackList},
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{"important", importantRules, "test.test.example.org", true, FilteredBlackList},
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{"important", importantRules, "testexample.org", false, NotFilteredNotFound},
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{"important", importantRules, "onemoreexample.org", false, NotFilteredNotFound},
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{"regex", regexRules, "example.org", true, FilteredBlackList},
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{"regex", regexRules, "test.example.org", false, NotFilteredWhiteList},
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{"regex", regexRules, "test.test.example.org", false, NotFilteredWhiteList},
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{"regex", regexRules, "testexample.org", true, FilteredBlackList},
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{"regex", regexRules, "onemoreexample.org", true, FilteredBlackList},
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{"mask", maskRules, "test.example.org", true, FilteredBlackList},
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{"mask", maskRules, "test2.example.org", true, FilteredBlackList},
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{"mask", maskRules, "example.com", true, FilteredBlackList},
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{"mask", maskRules, "exampleeee.com", true, FilteredBlackList},
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{"mask", maskRules, "onemoreexamsite.com", true, FilteredBlackList},
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{"mask", maskRules, "example.org", false, NotFilteredNotFound},
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{"mask", maskRules, "testexample.org", false, NotFilteredNotFound},
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{"mask", maskRules, "example.co.uk", false, NotFilteredNotFound},
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}
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func TestMatching(t *testing.T) {
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for _, test := range tests {
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t.Run(fmt.Sprintf("%s-%s", test.testname, test.hostname), func(t *testing.T) {
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filters := make(map[int]string)
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filters[0] = test.rules
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d := NewForTest(nil, filters)
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defer d.Destroy()
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ret, err := d.CheckHost(test.hostname, dns.TypeA, "")
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if err != nil {
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t.Errorf("Error while matching host %s: %s", test.hostname, err)
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}
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if ret.IsFiltered != test.isFiltered {
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t.Errorf("Hostname %s has wrong result (%v must be %v)", test.hostname, ret.IsFiltered, test.isFiltered)
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}
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if ret.Reason != test.reason {
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t.Errorf("Hostname %s has wrong reason (%v must be %v)", test.hostname, ret.Reason.String(), test.reason.String())
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}
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})
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}
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}
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// CLIENT SETTINGS
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func applyClientSettings(clientAddr string, setts *RequestFilteringSettings) {
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setts.FilteringEnabled = false
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setts.ParentalEnabled = false
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setts.SafeBrowsingEnabled = true
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rule, _ := urlfilter.NewNetworkRule("||facebook.com^", 0)
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s := ServiceEntry{}
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s.Name = "facebook"
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s.Rules = []*urlfilter.NetworkRule{rule}
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setts.ServicesRules = append(setts.ServicesRules, s)
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}
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// Check behaviour without any per-client settings,
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// then apply per-client settings and check behaviour once again
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func TestClientSettings(t *testing.T) {
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var r Result
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filters := make(map[int]string)
|
|
filters[0] = "||example.org^\n"
|
|
d := NewForTest(&Config{ParentalEnabled: true, SafeBrowsingEnabled: false}, filters)
|
|
defer d.Destroy()
|
|
d.ParentalSensitivity = 3
|
|
|
|
// no client settings:
|
|
|
|
// blocked by filters
|
|
r, _ = d.CheckHost("example.org", dns.TypeA, "1.1.1.1")
|
|
if !r.IsFiltered || r.Reason != FilteredBlackList {
|
|
t.Fatalf("CheckHost FilteredBlackList")
|
|
}
|
|
|
|
// blocked by parental
|
|
r, _ = d.CheckHost("pornhub.com", dns.TypeA, "1.1.1.1")
|
|
if !r.IsFiltered || r.Reason != FilteredParental {
|
|
t.Fatalf("CheckHost FilteredParental")
|
|
}
|
|
|
|
// safesearch is disabled
|
|
r, _ = d.CheckHost("wmconvirus.narod.ru", dns.TypeA, "1.1.1.1")
|
|
if r.IsFiltered {
|
|
t.Fatalf("CheckHost safesearch")
|
|
}
|
|
|
|
// not blocked
|
|
r, _ = d.CheckHost("facebook.com", dns.TypeA, "1.1.1.1")
|
|
assert.True(t, !r.IsFiltered)
|
|
|
|
// override client settings:
|
|
d.FilterHandler = applyClientSettings
|
|
|
|
// override filtering settings
|
|
r, _ = d.CheckHost("example.org", dns.TypeA, "1.1.1.1")
|
|
if r.IsFiltered {
|
|
t.Fatalf("CheckHost")
|
|
}
|
|
|
|
// override parental settings (force disable parental)
|
|
r, _ = d.CheckHost("pornhub.com", dns.TypeA, "1.1.1.1")
|
|
if r.IsFiltered {
|
|
t.Fatalf("CheckHost")
|
|
}
|
|
|
|
// override safesearch settings (force enable safesearch)
|
|
r, _ = d.CheckHost("wmconvirus.narod.ru", dns.TypeA, "1.1.1.1")
|
|
if !r.IsFiltered || r.Reason != FilteredSafeBrowsing {
|
|
t.Fatalf("CheckHost FilteredSafeBrowsing")
|
|
}
|
|
|
|
// blocked by additional rules
|
|
r, _ = d.CheckHost("facebook.com", dns.TypeA, "1.1.1.1")
|
|
assert.True(t, r.IsFiltered && r.Reason == FilteredBlockedService)
|
|
}
|
|
|
|
// BENCHMARKS
|
|
|
|
func BenchmarkSafeBrowsing(b *testing.B) {
|
|
d := NewForTest(&Config{SafeBrowsingEnabled: true}, nil)
|
|
defer d.Destroy()
|
|
for n := 0; n < b.N; n++ {
|
|
hostname := "wmconvirus.narod.ru"
|
|
ret, err := d.CheckHost(hostname, dns.TypeA, "")
|
|
if err != nil {
|
|
b.Errorf("Error while matching host %s: %s", hostname, err)
|
|
}
|
|
if !ret.IsFiltered {
|
|
b.Errorf("Expected hostname %s to match", hostname)
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkSafeBrowsingParallel(b *testing.B) {
|
|
d := NewForTest(&Config{SafeBrowsingEnabled: true}, nil)
|
|
defer d.Destroy()
|
|
b.RunParallel(func(pb *testing.PB) {
|
|
for pb.Next() {
|
|
hostname := "wmconvirus.narod.ru"
|
|
ret, err := d.CheckHost(hostname, dns.TypeA, "")
|
|
if err != nil {
|
|
b.Errorf("Error while matching host %s: %s", hostname, err)
|
|
}
|
|
if !ret.IsFiltered {
|
|
b.Errorf("Expected hostname %s to match", hostname)
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
func BenchmarkSafeSearch(b *testing.B) {
|
|
d := NewForTest(&Config{SafeSearchEnabled: true}, nil)
|
|
defer d.Destroy()
|
|
for n := 0; n < b.N; n++ {
|
|
val, ok := d.SafeSearchDomain("www.google.com")
|
|
if !ok {
|
|
b.Errorf("Expected safesearch to find result for www.google.com")
|
|
}
|
|
if val != "forcesafesearch.google.com" {
|
|
b.Errorf("Expected safesearch for google.com to be forcesafesearch.google.com")
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkSafeSearchParallel(b *testing.B) {
|
|
d := NewForTest(&Config{SafeSearchEnabled: true}, nil)
|
|
defer d.Destroy()
|
|
b.RunParallel(func(pb *testing.PB) {
|
|
for pb.Next() {
|
|
val, ok := d.SafeSearchDomain("www.google.com")
|
|
if !ok {
|
|
b.Errorf("Expected safesearch to find result for www.google.com")
|
|
}
|
|
if val != "forcesafesearch.google.com" {
|
|
b.Errorf("Expected safesearch for google.com to be forcesafesearch.google.com")
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestDnsfilterDialCache(t *testing.T) {
|
|
d := Dnsfilter{}
|
|
gctx.dialCache = gcache.New(1).LRU().Expiration(30 * time.Minute).Build()
|
|
|
|
d.shouldBeInDialCache("hostname")
|
|
if searchInDialCache("hostname") != "" {
|
|
t.Errorf("searchInDialCache")
|
|
}
|
|
addToDialCache("hostname", "1.1.1.1")
|
|
if searchInDialCache("hostname") != "1.1.1.1" {
|
|
t.Errorf("searchInDialCache")
|
|
}
|
|
}
|