Module rcode

DNS response codes and extended response codes.

The original DNS specification in RFC 1035 specified four bits of the message header as response code. The type Rcode defined herein represents these codes. Later, RFC 2671 (now RFC 6891) added eight bits to the response code to be transmitted as part of the OPT pseudo-resource record. To make matters even worse, the TSIG and TKEY records defined by RFC 2845 and RFC 2930 use a 16 bit error code. All of these codes share the same definition space. Even so, we have separate types for each of these.

Structs

• FromStrError
• InvalidRcode
  An integer couldn’t be converted into an rcode.
• OptRcode
  Extended DNS Response Codes for OPT records.
• Rcode
  DNS Response Codes.
• TsigRcode
  Response codes for transaction authentication (TSIG).