dnsQueryUtil

Construct a fully qualified domain name (FQDN) by combining a subdomain and an origin domain.

CookieEDNS0 generates an 8-byte random cookie value for EDNS0.

NewQuery returns *Query with Client, Protocol, Cookie *if needed*, Authentication (TSIG or SIG(0)) *if needed*.

Set EDNS0 to the *message.

Extract the keyname, the flag number, the public key and the algorithm number from the SIG(0) public key file.

Extract the key name, the algorithm name and the secret key from a TSIG key file.

VerifyPeer verifies a certificate to check its validity with x509.

Recommended value for EDNS0.