chromium/net/dns/dns_names_util.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/dns/dns_names_util.h"

#include <cstddef>
#include <cstdint>
#include <cstring>
#include <optional>
#include <string>
#include <string_view>
#include <vector>

#include "base/check.h"
#include "base/containers/span.h"
#include "base/containers/span_reader.h"
#include "net/base/ip_address.h"
#include "net/base/url_util.h"
#include "net/dns/public/dns_protocol.h"
#include "url/third_party/mozilla/url_parse.h"
#include "url/url_canon.h"
#include "url/url_canon_stdstring.h"

namespace net::dns_names_util {

bool IsValidDnsName(std::string_view dotted_form_name) { … }

bool IsValidDnsRecordName(std::string_view dotted_form_name) { … }

// Based on DJB's public domain code.
std::optional<std::vector<uint8_t>> DottedNameToNetwork(
    std::string_view dotted_form_name,
    bool require_valid_internet_hostname) { … }

std::optional<std::string> NetworkToDottedName(base::span<const uint8_t> span,
                                               bool require_complete) { … }

std::optional<std::string> NetworkToDottedName(
    base::SpanReader<const uint8_t>& reader,
    bool require_complete) { … }

bool ReadU8LengthPrefixed(base::SpanReader<const uint8_t>& reader,
                          base::span<const uint8_t>* out) { … }

bool ReadU16LengthPrefixed(base::SpanReader<const uint8_t>& reader,
                           base::span<const uint8_t>* out) { … }

std::string UrlCanonicalizeNameIfAble(std::string_view name) { … }

}  // namespace net::dns_names_util