Difference between revisions of "Unit DNS"

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----
 
----
  
−
''To be documented''
+
 
 +
'''DNS specific types'''
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 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDNSHeader = ^TDNSHeader;</code>
 +
 
 +
<code>TDNSHeader = packed record</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
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|colspan="2"|Note: All Network Order
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|-
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| <code>Identifier:Word;</code>
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| unique identifier
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|-
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| <code>Flags:Word;</code>
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| QD/Opcode/AA/TC/RD/RA/RCODE
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|-
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| <code>QuestionCount:Word;</code>
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| question section, number of entries
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|-
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| <code>AnswerCount:Word;</code>
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| answers, how many
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|-
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| <code>AuthorityCount:Word;</code>
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| count of name server RRs
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|-
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| <code>AdditionalCount:Word;</code>
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| number of "additional" records
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|-
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|}
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</div></div> 
 +
 
 +
'''DNS message'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDNSMessage = ^TDNSMessage;</code>
 +
 
 +
<code>TDNSMessage = packed record</code>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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| <code>DNS:TDNSHeader;</code>
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| style="width: 50%;"|&nbsp;
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|-
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| <code>Data:array[0..(MAX_DNS_MESSAGE - DNS_HEADER_SIZE) - 1] of Byte;</code>
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| &nbsp;
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|-
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|}
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</div></div> 
 +
 +
'''DNA name'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDNSName = ^TDNSName;</code>
 +
 
 +
<code>TDNSName = array[0..MAX_DNS_NAME - 1] of Char;</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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| &nbsp;
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| style="width: 90%;"|&nbsp;
 +
|-
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|}
 +
</div></div>
 +
 
 +
'''DNS question'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDNSQuestion = ^TDNSQuestion;</code>
 +
 
 +
<code>TDNSQuestion = packed record</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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|colspan="2"|Note: All Network Order
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|-
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| <code>Name:TDNSName;</code>
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| variable length question name
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|-
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| <code>QuestionType:Word;</code>
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| question type (eg DNS_TYPE_A)
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|-
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| <code>QuestionClass:Word;</code>
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| question class (eg DNS_CLASS_IN)
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|-
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|}
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</div></div> 
 +
 
 +
'''DNS resource'''
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 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDNSResource = ^TDNSResource;</code>
 +
 
 +
<code>TDNSResource = packed record</code>
 +
<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
 +
{| class="wikitable" style="font-size: 14px; background: white;"
 +
|-
 +
|colspan="2"|Note: All Network Order
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|-
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| <code>Name:TDNSName;</code>
 +
| variable length resource name
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|-
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| <code>RecordType:Word;</code>
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| resource record type (eg DNS_TYPE_A)
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|-
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| <code>RecordClass:Word;</code>
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| resource record class (eg DNS_CLASS_IN)
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|-
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| <code>Ttl:LongWord;</code>
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| time-to-live, changed to 32 bits
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|-
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| <code>DataLength:Word;</code>
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| length of data field
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|-
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| <code>RecordData:array[0..MAX_DNS_MESSAGE - 1] of Byte;</code>
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| data field
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|-
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|}
 +
</div></div> 
 +
 
 +
'''DNA client data'''
 +
 
 +
<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial;">
 +
<code>PDNSClientData = ^TDNSClientData;</code>
 +
 
 +
<code>TDNSClientData = record</code>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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|colspan="2"|Note: Used for TLS Data
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|-
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|colspan="2"|''Host Ent''
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|-
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| <code>HostEnt:THostEnt;</code>
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| style="width: 50%;"|&nbsp;
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|-
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| <code>HostEntName:array[0..MAX_NAME_SIZE - 1] of Char;</code>
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| &nbsp;
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|-
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| <code>HostAliasesPtr:PChar;</code>
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| &nbsp;
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|-
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| <code>HostAliases:array[0..(MAX_NAME_SIZE * MAX_NAME_ALIASES) - 1] of Char;</code>
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| &nbsp;
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|-
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| <code>HostAddrListPtr:PChar;</code>
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| &nbsp;
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|-
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| <code>HostAddrList:array[0..MAX_HOST_ALIASES - 1] of TInAddr;</code>
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| &nbsp;
 +
|-
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|colspan="2"|''Net Ent''
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|-
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| <code>NetEnt:TNetEnt;</code>
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| &nbsp;
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|-
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| <code>NetEntName:array[0..MAX_NAME_SIZE - 1] of Char;</code>
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| &nbsp;
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|-
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| <code>NetAliasesPtr:PChar;</code>
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| &nbsp;
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|-
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| <code>NetAliases:array[0..(MAX_NAME_SIZE * MAX_NAME_ALIASES) - 1] of Char;</code>
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| &nbsp;
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|-
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|colspan="2"|''Serv Ent''
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|-
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| <code>ServEnt:TServEnt;</code>
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| &nbsp;
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|-
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| <code>ServEntName:array[0..MAX_NAME_SIZE - 1] of Char;</code>
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| &nbsp;
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|-
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| <code>ServAliasesPtr:PChar;</code>
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| &nbsp;
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|-
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| <code>ServAliases:array[0..(MAX_NAME_SIZE * MAX_NAME_ALIASES) - 1] of Char;</code>
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| &nbsp;
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|-
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| <code>ServEntProto:array[0..MAX_NAME_SIZE - 1] of Char;</code>
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| &nbsp;
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|-
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|colspan="2"|''Proto Ent''
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|-
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| <code>ProtoEnt:TProtoEnt;</code>
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| &nbsp;
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|-
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| <code>ProtoEntName:array[0..MAX_NAME_SIZE - 1] of Char;</code>
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| &nbsp;
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|-
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| <code>ProtoAliasesPtr:PChar;</code>
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| &nbsp;
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|-
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| <code>ProtoAliases:array[0..(MAX_NAME_SIZE * MAX_NAME_ALIASES) - 1] of Char;</code>
 +
| &nbsp;
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|-
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|}
 +
</div></div>
 +
<br />
  
 
=== Class definitions ===
 
=== Class definitions ===

Revision as of 00:54, 18 January 2017

Return to Unit Reference


Description

Ultibo DNS client unit

Note: DNS Client is IPv4 based, for IPv6 see new Winsock2 functions

See RFC 1035 Section 4 for details

Constants


[Expand]
DNS specific constants DNS_*


[Expand]
DNS flag constants DNS_FLAG_*


[Expand]
DNS field masks constants DNS_OPCODE_*


[Expand]
DNS query code constants DNS_QUERY*


[Expand]
DNS response code constants DNS_NO_*


[Expand]
DNS record type constants DNS_TYPE_*


[Expand]
DNS address class constants DNS_CLASS_*


[Expand]
DNS message compression constants DNS_POINTER_*


Type definitions


DNS specific types

[Expand]

PDNSHeader = ^TDNSHeader;

TDNSHeader = packed record

DNS message

[Expand]

PDNSMessage = ^TDNSMessage;

TDNSMessage = packed record

DNA name

[Expand]

PDNSName = ^TDNSName;

TDNSName = array[0..MAX_DNS_NAME - 1] of Char;

DNS question

[Expand]

PDNSQuestion = ^TDNSQuestion;

TDNSQuestion = packed record

DNS resource

[Expand]

PDNSResource = ^TDNSResource;

TDNSResource = packed record

DNA client data

[Expand]

PDNSClientData = ^TDNSClientData;

TDNSClientData = record


Class definitions

To be documented

Public variables

None defined

Function declarations


Initialization functions

[Expand] 
procedure DNSInit;
Description: To be documented


[Expand] 
function DNSStart:LongWord;
Description: To be documented


[Expand] 
function DNSStop:LongWord;
Description: To be documented


Return to Unit Reference

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