// Copyright 2020 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef NET_DNS_DNS_ALIAS_UTILITY_H_ #define NET_DNS_DNS_ALIAS_UTILITY_H_ #include #include #include "base/strings/string_piece.h" #include "net/base/net_export.h" namespace net::dns_alias_utility { // Validates that `alias` represents a valid DNS alias name, e.g. CNAME, and // then URL-canonicalizes the name. Returns empty string if not valid or unable // to canonicalize. NET_EXPORT_PRIVATE std::string ValidateAndCanonicalizeAlias( base::StringPiece alias); // Returns a fixed up set of canonicalized aliases (i.e. aliases that are // written as hostnames for canonical URLs). The set is stripped of "localhost", // IP addresses, duplicates, the empty string, strings longer than // `dns_protocol::kMaxCharNameLength` characters (with one extra character // allowed for fully-qualified hostnames, i.e. hostnames ending with '.'), and // any strings that fail to URL-canonicalize as hosts. The remaining aliases are // replaced with their canonicalized forms. NET_EXPORT_PRIVATE std::set FixUpDnsAliases( const std::set& aliases); } // namespace net::dns_alias_utility #endif // NET_DNS_DNS_ALIAS_UTILITY_H_