159 lines
3.7 KiB
C++
159 lines
3.7 KiB
C++
// Copyright (c) 1997-1999 Microsoft Corporation
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//
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// DNS API wrappers
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//
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// 12-16-97 sburns
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#ifndef DNS_HPP_INCLUDED
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#define DNS_HPP_INCLUDED
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// A collection of DNS related names.
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namespace Dns
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{
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// the number of bytes in a full DNS name to reserve for stuff
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// netlogon pre-/appends to DNS names when registering them
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const size_t SRV_RECORD_RESERVE = 100;
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// the max lengths, in bytes, of strings when represented in the UTF-8
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// character set. These are the limits we expose to the user
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const size_t MAX_NAME_LENGTH = DNS_MAX_NAME_LENGTH - SRV_RECORD_RESERVE;
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const size_t MAX_LABEL_LENGTH = DNS_MAX_LABEL_LENGTH;
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// Compares DNS names with DnsNameCompareEx (see private\inc\dnsapi.h),
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// returning the result.
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DNS_NAME_COMPARE_STATUS
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CompareNames(const String& dnsNameLeft, const String& dnsNameRight);
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// Returns the name of the parent DNS domain. E.g. if "foo.bar.com" is
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// passed, then "bar.com" is the result. If "com" is passed, then "."
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// (the root zone) is the result.
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//
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// domainName - the name of the domain
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String
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GetParentDomainName(const String& domainName);
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// Returns corresponding NetBIOS name, or empty string if mapping failed.
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// Not for domain names -- just computer names!
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//
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// hostname - the name to be mapped to a NetBIOS name. This name must be a
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// valid DNS name.
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//
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// err - ptr to a variable that will accept the win error code returned if
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// the conversion fails. If the conversion fails, the return value is
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// the empty string.
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String
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HostnameToNetbiosName(const String& hostname, HRESULT* err=0);
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// returns true if the DNS client is configured, false if not.
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bool
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IsClientConfigured();
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// returns true if the Microsoft DNS server is installed on this computer,
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// false if not.
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bool
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IsServiceInstalled();
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// returns true if the Microsoft DNS server is currently running on this
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// computer, false if not.
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bool
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IsServiceRunning();
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enum ValidateResult
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{
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VALID,
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INVALID,
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NON_RFC,
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TOO_LONG,
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NUMERIC,
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BAD_CHARS
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};
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// Validates a single DNS label for proper length (in the UTF-8
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// character set) and syntax.
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//
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// candidateDNSLabel - the label to be validated
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ValidateResult
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ValidateDnsLabelSyntax(const String& candidateDNSLabel);
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// Validates the format, not the existence, of a DNS name. Checks for
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// proper length in the UTF-8 character set, and proper syntax.
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//
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// candidateDNSName - in, the DNS name to verify.
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//
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// maxUnicodeCharacters - in, maximum number of uncode characters to
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// allow in the name. If the name contains more characters than this,
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// TOO_LONG is returned.
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//
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// maxUTF8Bytes - in, maximum number of bytes allowed to represent the name
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// in the UTF-8 character set. Since a unicode character requires at
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// least one byte in UTF-8, this value must be >= maxUnicodeCharacters.
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ValidateResult
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ValidateDnsNameSyntax(
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const String& candidateDNSName,
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size_t maxUnicodeCharacters = Dns::MAX_NAME_LENGTH,
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size_t maxUTF8Bytes = Dns::MAX_NAME_LENGTH);
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}
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DNS_STATUS
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MyDnsValidateName(const String& name, DNS_NAME_FORMAT format);
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String
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MyDnsStatusString(DNS_STATUS status);
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// caller must free the result with MyDnsRecordListFree
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DNS_STATUS
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MyDnsQuery(
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const String& name,
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WORD type,
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DWORD options,
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DNS_RECORD*& result);
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void
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MyDnsRecordListFree(DNS_RECORD* rl);
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#endif // DNS_HPP_INCLUDED
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