1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef NET_BASE_DNS_UTIL_H_ 6 #define NET_BASE_DNS_UTIL_H_ 7 8 #include <string> 9 10 #include "base/basictypes.h" 11 #include "base/strings/string_piece.h" 12 #include "net/base/net_export.h" 13 14 namespace net { 15 16 // DNSDomainFromDot - convert a domain string to DNS format. From DJB's 17 // public domain DNS library. 18 // 19 // dotted: a string in dotted form: "www.google.com" 20 // out: a result in DNS form: "\x03www\x06google\x03com\x00" 21 NET_EXPORT_PRIVATE bool DNSDomainFromDot(const base::StringPiece& dotted, 22 std::string* out); 23 24 // DNSDomainToString converts a domain in DNS format to a dotted string. 25 // Excludes the dot at the end. 26 NET_EXPORT_PRIVATE std::string DNSDomainToString( 27 const base::StringPiece& domain); 28 29 // Returns true iff the given character is in the set of valid DNS label 30 // characters as given in RFC 3490, 4.1, 3(a) 31 NET_EXPORT_PRIVATE bool IsSTD3ASCIIValidCharacter(char c); 32 33 // Returns the hostname by trimming the ending dot, if one exists. 34 NET_EXPORT std::string TrimEndingDot(const base::StringPiece& host); 35 36 } // namespace net 37 38 #endif // NET_BASE_DNS_UTIL_H_ 39
