6. macdnr -- Interface to the Macintosh Domain Name Resolver

Availability: Macintosh.

This module provides an interface to the Macintosh Domain Name Resolver. It is usually used in conjunction with the mactcp module, to map hostnames to IP addresses. It may not be available in all Mac Python versions.

The macdnr module defines the following functions:

Open ([filename])
Open the domain name resolver extension. If filename is given it should be the pathname of the extension, otherwise a default is used. Normally, this call is not needed since the other calls will open the extension automatically.

Close ()
Close the resolver extension. Again, not needed for normal use.

StrToAddr (hostname)
Look up the IP address for hostname. This call returns a dnr result object of the ``address'' variation.

AddrToName (addr)
Do a reverse lookup on the 32-bit integer IP-address addr. Returns a dnr result object of the ``address'' variation.

AddrToStr (addr)
Convert the 32-bit integer IP-address addr to a dotted-decimal string. Returns the string.

HInfo (hostname)
Query the nameservers for a HInfo record for host hostname. These records contain hardware and software information about the machine in question (if they are available in the first place). Returns a dnr result object of the ``hinfo'' variety.

MXInfo (domain)
Query the nameservers for a mail exchanger for domain. This is the hostname of a host willing to accept SMTP mail for the given domain. Returns a dnr result object of the ``mx'' variety.



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