Unit dnssend
Description
DNS client by UDP or TCPSupport for sending DNS queries by UDP or TCP protocol. It can retrieve zone
transfers too!
Used RFC: RFC-1035, RFC-1183, RFC1706, RFC1712, RFC2163, RFC2230
Classes, Interfaces and Objects
Class TDNSSend |
Implementation of DNS protocol by UDP or TCP protocol. |
Functions and Procedures
Overview
function GetMailServers(const DNSHost, Domain: AnsiString; const Servers: TStrings): Boolean; |
Description
function GetMailServers(const DNSHost, Domain: AnsiString; const Servers: TStrings): Boolean; |
A very useful function, and example of it's use is found in the TDNSSend object.
This function is used to get mail servers for a domain and sort them by
preference numbers. "Servers" contains only the domain names of the mail
servers in the right order (without preference number!). The first domain name
will always be the highest preferenced mail server. Returns boolean True
if
all went well.
Constants
cDnsProtocol = 'domain'; |
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QTYPE_A = 1; |
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QTYPE_NS = 2; |
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QTYPE_MD = 3; |
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QTYPE_MF = 4; |
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QTYPE_CNAME = 5; |
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QTYPE_SOA = 6; |
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QTYPE_MB = 7; |
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QTYPE_MG = 8; |
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QTYPE_MR = 9; |
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QTYPE_NULL = 10; |
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QTYPE_WKS = 11; |
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QTYPE_PTR = 12; |
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QTYPE_HINFO = 13; |
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QTYPE_MINFO = 14; |
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QTYPE_MX = 15; |
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QTYPE_TXT = 16; |
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QTYPE_RP = 17; |
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QTYPE_AFSDB = 18; |
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QTYPE_X25 = 19; |
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QTYPE_ISDN = 20; |
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QTYPE_RT = 21; |
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QTYPE_NSAP = 22; |
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QTYPE_NSAPPTR = 23; |
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QTYPE_SIG = 24; |
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QTYPE_KEY = 25; |
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QTYPE_PX = 26; |
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QTYPE_GPOS = 27; |
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QTYPE_AAAA = 28; |
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QTYPE_LOC = 29; |
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QTYPE_NXT = 30; |
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QTYPE_SRV = 33; |
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QTYPE_NAPTR = 35; |
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QTYPE_KX = 36; |
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QTYPE_AXFR = 252; |
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QTYPE_MAILB = 253; |
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QTYPE_MAILA = 254; |
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QTYPE_ALL = 255; |
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