14.5. Built-in Module macdnr

The macdnr module defines the following functions:

Open ([filename]) -- function of module macdnr

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 () -- function of module macdnr

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

StrToAddr (hostname) -- function of module macdnr

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

AddrToName (addr) -- function of module macdnr

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

AddrToStr (addr) -- function of module macdnr

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

HInfo (hostname) -- function of module macdnr

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) -- function of module macdnr

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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dnr result object