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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef nsIDNService_h__
#define nsIDNService_h__
#include "nsIIDNService.h"
#include "mozilla/RWLock.h"
#include "mozilla/intl/UnicodeScriptCodes.h"
#include "mozilla/net/IDNBlocklistUtils.h"
#include "mozilla/Span.h"
class nsIPrefBranch;
// nsIDNService
namespace mozilla::net {
enum ScriptCombo : int32_t;
class nsIDNService final : public nsIIDNService {
nsresult Init();
virtual ~nsIDNService();
void prefsChanged(const char* pref);
static void PrefChanged(const char* aPref, void* aSelf) {
auto* self = static_cast<nsIDNService*>(aSelf);
* Determine whether a label is considered safe to display to the user
* according to the algorithm defined in UTR 39 and the profile
* selected in mRestrictionProfile.
* For the ASCII-only profile, returns false for all labels containing
* non-ASCII characters.
* For the other profiles, returns false for labels containing any of
* the following:
* Characters in scripts other than the "recommended scripts" and
* "aspirational scripts" defined in
* This includes codepoints that are not defined as Unicode
* characters
* Illegal combinations of scripts (@see illegalScriptCombo)
* Numbers from more than one different numbering system
* Sequences of the same non-spacing mark
* Both simplified-only and traditional-only Chinese characters
* XXX this test was disabled by bug 857481
bool IsLabelSafe(mozilla::Span<const char32_t> aLabel,
mozilla::Span<const char32_t> aTLD) MOZ_EXCLUDES(mLock);
* Restriction-level Detection profiles defined in UTR 39
* and selected by the pref network.IDN.restriction_profile
enum restrictionProfile {
* Determine whether a combination of scripts in a single label is
* permitted according to the algorithm defined in UTR 39 and the
* profile selected in mRestrictionProfile.
* For the "Highly restrictive" profile, all characters in each
* identifier must be from a single script, or from the combinations:
* Latin + Han + Hiragana + Katakana;
* Latin + Han + Bopomofo; or
* Latin + Han + Hangul
* For the "Moderately restrictive" profile, Latin is also allowed
* with other scripts except Cyrillic and Greek
bool illegalScriptCombo(restrictionProfile profile,
mozilla::intl::Script script,
mozilla::net::ScriptCombo& savedScript);
// We use this rwlock to guard access to:
// |mIDNBlocklist|, |mRestrictionProfile|
mozilla::RWLock mLock{"nsIDNService"};
// guarded by mLock
nsTArray<mozilla::net::BlocklistRange> mIDNBlocklist MOZ_GUARDED_BY(mLock);
// guarded by mLock;
restrictionProfile mRestrictionProfile MOZ_GUARDED_BY(mLock){
extern "C" MOZ_EXPORT bool mozilla_net_is_label_safe(const char32_t* aLabel,
size_t aLabelLen,
const char32_t* aTld,
size_t aTldLen);
#endif // nsIDNService_h__