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Net::DNS::Update

NAME

SYNOPSIS

DESCRIPTION

WARNING: This code is still under development. Please use with caution on production nameservers.  

METHODS

new

    $packet = Net::DNS::Update->new;
    $packet = Net::DNS::Update->new("example.com");
    $packet = Net::DNS::Update->new("example.com", "HS");

Programs must use the "push" method to add RRs to the prerequisite, update, and additional sections before performing the update.

Arguments are the zone name and the class. If the zone is omitted, the default domain will be taken from the resolver configuration. If the class is omitted, it defaults to IN.

Future versions of "Net::DNS" may provide a simpler interface for making dynamic updates.  

EXAMPLES

Add a new host

    #!/usr/bin/perl -w

    use Net::DNS;

    # Create the update packet.
    $update = Net::DNS::Update->new("example.com");

    # Prerequisite is that no A records exist for the name.
    $update->push("pre", nxrrset("foo.example.com. A"));

    # Add two A records for the name.
    $update->push("update", rr_add("foo.example.com. 86400 A 192.168.1.2"));
    $update->push("update", rr_add("foo.example.com. 86400 A 172.16.3.4"));

    # Send the update to the zone's primary master.
    $res = Net::DNS::Resolver->new;
    $res->nameservers("primary-master.example.com");
    $reply = $res->send($update);

    # Did it work?
    if (defined $reply) {
        if ($reply->header->rcode eq "NOERROR") {
            print "Update succeeded\n";
        }
        else {
            print "Update failed: ", $reply->header->rcode, "\n";
        }
    }
    else {
        print "Update failed: ", $res->errorstring, "\n";
    }

Add an MX record for a name that already exists

    $update = Net::DNS::Update->new("example.com");
    $update->push("pre", yxdomain("example.com"));
    $update->push("update", rr_add("example.com MX 10 mailhost.example.com"));

Add a TXT record for a name that doesn't exist

    $update = Net::DNS::Update->new("example.com");
    $update->push("pre", nxdomain("info.example.com"));
    $update->push("update", rr_add("info.example.com TXT 'yabba dabba doo'"));

Delete all A records for a name

    $update = Net::DNS::Update->new("example.com");
    $update->push("pre", yxrrset("foo.example.com A"));
    $update->push("update", rr_del("foo.example.com A"));

Delete all R

    $update = Net::DNS::Update->new("example.com");
    $update->push("pre", yxdomain("byebye.example.com"));
    $update->push("update", rr_del("byebye.example.com"));

Perform a signed update

    $key_name = "tsig-key";
    $key = "awwLOtRfpGE+rRKF2+DEiw==";

    $update = Net::DNS::Update->new("example.com");
    $update->push("update", rr_add("foo.example.com A 10.1.2.3"));
    $update->push("update", rr_add("bar.example.com A 10.4.5.6"));
    $update->sign_tsig($key_name, $key);

Another way to perform a signed update

    $key_name = "tsig-key";
    $key = "awwLOtRfpGE+rRKF2+DEiw==";

    $update = Net::DNS::Update->new("example.com");
    $update->push("update", rr_add("foo.example.com A 10.1.2.3"));
    $update->push("update", rr_add("bar.example.com A 10.4.5.6"));
    $update->push("additional", Net::DNS::RR->new("$key_name TSIG $key"));

Perform a signed update with a customized TSIG record

    $key_name = "tsig-key";
    $key = "awwLOtRfpGE+rRKF2+DEiw==";

    $tsig = Net::DNS::RR->new("$key_name TSIG $key");
    $tsig->fudge(60);

    $update = Net::DNS::Update->new("example.com");
    $update->push("update", rr_add("foo.example.com A 10.1.2.3"));
    $update->push("update", rr_add("bar.example.com A 10.4.5.6"));
    $update->push("additional", $tsig);

BUGS

COPYRIGHT

SEE ALSO

Index

NAME

SYNOPSIS

DESCRIPTION

METHODS

new

EXAMPLES

Add a new host

Add an MX record for a name that already exists

Add a TXT record for a name that doesn't exist

Delete all A records for a name

Delete all RRs for a name

Perform a signed update

Another way to perform a signed update

Perform a signed update with a customized TSIG record

BUGS

COPYRIGHT

SEE ALSO