1 // Copyright (c) 2009 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 #pragma once 8 9 #include <string> 10 11 #include "base/basictypes.h" 12 13 namespace net { 14 15 // DNSDomainFromDot - convert a domain string to DNS format. From DJB's 16 // public domain DNS library. 17 // 18 // dotted: a string in dotted form: "www.google.com" 19 // out: a result in DNS form: "\x03www\x06google\x03com\x00" 20 bool DNSDomainFromDot(const std::string& dotted, std::string* out); 21 22 // DNSDomainToString coverts a domain in DNS format to a dotted string. 23 std::string DNSDomainToString(const std::string& domain); 24 25 // Returns true iff the given character is in the set of valid DNS label 26 // characters as given in RFC 3490, 4.1, 3(a) 27 bool IsSTD3ASCIIValidCharacter(char c); 28 29 // Returns the hostname by trimming the ending dot, if one exists. 30 std::string TrimEndingDot(const std::string& host); 31 32 // DNS resource record types. See 33 // http://www.iana.org/assignments/dns-parameters 34 // WARNING: if you're adding any new values here you may need to add them to 35 // dnsrr_resolver.cc:DnsRRIsParsedByWindows. 36 37 static const uint16 kDNS_CNAME = 5; 38 static const uint16 kDNS_TXT = 16; 39 static const uint16 kDNS_CERT = 37; 40 static const uint16 kDNS_DS = 43; 41 static const uint16 kDNS_RRSIG = 46; 42 static const uint16 kDNS_DNSKEY = 48; 43 static const uint16 kDNS_ANY = 0xff; 44 static const uint16 kDNS_CAA = 13172; // temporary, not IANA 45 static const uint16 kDNS_TESTING = 0xfffe; // in private use area. 46 47 // http://www.iana.org/assignments/dns-sec-alg-numbers/dns-sec-alg-numbers.xhtml 48 static const uint8 kDNSSEC_RSA_SHA1 = 5; 49 static const uint8 kDNSSEC_RSA_SHA1_NSEC3 = 7; 50 static const uint8 kDNSSEC_RSA_SHA256 = 8; 51 52 // RFC 4509 53 static const uint8 kDNSSEC_SHA1 = 1; 54 static const uint8 kDNSSEC_SHA256 = 2; 55 56 } // namespace net 57 58 #endif // NET_BASE_DNS_UTIL_H_ 59
