new (from string)¶

 $a     = Net::DNS::RR->new("foo.example.com. 86400 A 10.1.2.3");
 $mx    = Net::DNS::RR->new("example.com. 7200 MX 10 mailhost.example.com.");
 $cname = Net::DNS::RR->new("www.example.com 300 IN CNAME www1.example.com");
 $txt   = Net::DNS::RR->new('baz.example.com 3600 HS TXT "text record"');

Returns a "Net::DNS::RR" object of the appropriate type and initialized from the string passed by the user. The format of the string is that used in zone files, and is compatible with the string returned by "Net::DNS::RR->string".

The name and RR type are required; all other information is optional. If omitted, the TTL defaults to 0 and the RR class defaults to IN. Omitting the optional fields is useful for creating the empty RDATA sections required for certain dynamic update operations. See the "Net::DNS::Update" manual page for additional examples.

All names must be fully qualified. The trailing dot (.) is optional.

new (from hash)¶

 $rr = Net::DNS::RR->new(
         name    => "foo.example.com",
         ttl     => 86400,
         class   => "IN",
         type    => "A",
         address => "10.1.2.3",
 );
 
 $rr = Net::DNS::RR->new(
         name => "foo.example.com",
         type => "A",
 );

Returns an RR object of the appropriate type, or a "Net::DNS::RR" object if the type isn't implemented. See the manual pages for each RR type to see what fields the type requires.

The "Name" and "Type" fields are required; all others are optional. If omitted, "TTL" defaults to 0 and "Class" defaults to IN. Omitting the optional fields is useful for creating the empty RDATA sections required for certain dynamic update operations.

The fields are case-insensitive, but starting each with uppercase is recommended.

parse¶

    ($rrobj, $offset) = Net::DNS::RR->parse(\$data, $offset);

Parses a DNS resource record at the specified location within a DNS packet. The first argument is a reference to the packet data. The second argument is the offset within the packet where the resource record begins.

Returns a Net::DNS::RR object and the offset of the next location in the packet.

Parsing is aborted if the object could not be created (e.g., corrupt or insufficient data).

print¶

    $rr->print;

Prints the record to the standard output. Calls the string method to get the RR's string representation.

string¶

    print $rr->string, "\n";

Returns a string representation of the RR. Calls the rdatastr method to get the RR-specific data. Domain names are returned in RFC1035 format, i.e. all non letter, digit, hyphen characters are represented as \DDD.

rdatastr¶

    $s = $rr->rdatastr;

Returns a string containing RR-specific data. Subclasses will need to implement this method.

name¶

    $name = $rr->name;

Returns the record's domain name.

type¶

    $type = $rr->type;

Returns the record's type.

class¶

    $class = $rr->class;

Returns the record's class.

ttl¶

    $ttl = $rr->ttl;

Returns the record's time-to-live (TTL).

rdlength¶

    $rdlength = $rr->rdlength;

Returns the length of the record's data section.

rdata¶

    $rdata = $rr->rdata

Returns the record's data section as binary data.

set_rrsort_func¶

Net::DNS::RR::SRV->set_rrsort_func("priority", sub { my ($a,$b)=($Net::DNS::a,$Net::DNS::b); $a->priority <=> $b->priority || $b->weight <=> $a->weight
}

Net::DNS::RR::SRV->set_rrsort_func("default_sort", sub { my ($a,$b)=($Net::DNS::a,$Net::DNS::b); $a->priority <=> $b->priority || $b->weight <=> $a->weight
}

set_rrsort_func needs to be called as a class method. The first argument is the attribute name on which the sorting will need to take place. If you specify "default_sort" than that is the sort algorithm that will be used in the case that rrsort() is called without an RR attribute as argument.

The second argument is a reference to a function that uses the variables $a and $b global to the "from Net::DNS"(!!)package for the sorting. During the sorting $a and $b will contain references to objects from the class you called the set_prop_sort from. In other words, you can rest assured that the above sorting function will only get Net::DNS::RR::SRV objects.

The above example is the sorting function that actually is implemented in SRV.