net/base/dns_util.h

   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_