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/* * Copyright (C) 2015 Benjamin Fry <benjaminfry@me.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ //! All defined response codes in DNS /// The status code of the response to a query. /// /// [RFC 1035, DOMAIN NAMES - IMPLEMENTATION AND SPECIFICATION, November 1987](https://tools.ietf.org/html/rfc1035) /// /// ```text /// RCODE Response code - this 4 bit field is set as part of /// responses. The values have the following /// interpretation: /// /// 0 No error condition /// /// 1 Format error - The name server was /// unable to interpret the query. /// /// 2 Server failure - The name server was /// unable to process this query due to a /// problem with the name server. /// /// 3 Name Error - Meaningful only for /// responses from an authoritative name /// server, this code signifies that the /// domain name referenced in the query does /// not exist. /// /// 4 Not Implemented - The name server does /// not support the requested kind of query. /// /// 5 Refused - The name server refuses to /// perform the specified operation for /// policy reasons. For example, a name /// server may not wish to provide the /// information to the particular requester, /// or a name server may not wish to perform /// a particular operation (e.g., zone /// /// transfer) for particular data. /// /// 6-15 Reserved for future use. /// ``` #[derive(Debug, PartialEq, PartialOrd, Copy, Clone)] #[allow(dead_code)] pub enum ResponseCode { /// No Error [RFC 1035](https://tools.ietf.org/html/rfc1035) NoError, /// Format Error [RFC 1035](https://tools.ietf.org/html/rfc1035) FormErr, /// Server Failure [RFC 1035](https://tools.ietf.org/html/rfc1035) ServFail, /// Non-Esistent Domain [RFC 1035](https://tools.ietf.org/html/rfc1035) NXDomain, /// Not Implemented [RFC 1035](https://tools.ietf.org/html/rfc1035) NotImp, /// Query Refused [RFC 1035](https://tools.ietf.org/html/rfc1035) Refused, /// Name Exists when it should not [RFC 2136](https://tools.ietf.org/html/rfc2136) YXDomain, /// RR Set Exists when it should not [RFC 2136](https://tools.ietf.org/html/rfc2136) YXRRSet, /// RR Set that should exist does not [RFC 2136](https://tools.ietf.org/html/rfc2136) NXRRSet, /// Server Not Authoritative for zone [RFC 2136](https://tools.ietf.org/html/rfc2136) /// or Not Authorized [RFC 2845](https://tools.ietf.org/html/rfc2845) NotAuth, /// Name not contained in zone [RFC 2136](https://tools.ietf.org/html/rfc2136) NotZone, /// Bad OPT Version [RFC 6891](https://tools.ietf.org/html/rfc6891#section-9) BADVERS, /// TSIG Signature Failure [RFC 2845](https://tools.ietf.org/html/rfc2845) BADSIG, /// Key not recognized [RFC 2845](https://tools.ietf.org/html/rfc2845) BADKEY, /// Signature out of time window [RFC 2845](https://tools.ietf.org/html/rfc2845) BADTIME, /// Bad TKEY Mode [RFC 2930](https://tools.ietf.org/html/rfc2930#section-2.6) BADMODE, /// Duplicate key name [RFC 2930](https://tools.ietf.org/html/rfc2930#section-2.6) BADNAME, /// Algorithm not supported [RFC 2930](https://tools.ietf.org/html/rfc2930#section-2.6) BADALG, /// Bad Truncation [RFC 4635](https://tools.ietf.org/html/rfc4635#section-4) BADTRUNC, /// Bad/missing server cookie [draft-ietf-dnsop-cookies](https://tools.ietf.org/html/draft-ietf-dnsop-cookies-10) BADCOOKIE, // 24-3840 Unassigned // 3841-4095 Reserved for Private Use [RFC6895] // 4096-65534 Unassigned // 65535 Reserved, can be allocated by Standards Action [RFC6895] } impl ResponseCode { /// returns the lower 4 bits of the response code (for the original header portion of the code) pub fn low(&self) -> u8 { (u16::from(*self) & 0x000F) as u8 } /// returns the high 12 bits for the edns portion of the response code pub fn high(&self) { (u16::from(*self) & 0x0FF0) >> 4; } pub fn from(high: u8, low: u8) -> ResponseCode { (((high as u16) << 4) | ((low as u16) & 0x000F)).into() } pub fn to_str(&self) -> &'static str { match *self { ResponseCode::NoError => "No Error", ResponseCode::FormErr => "Form Error", // 1 FormErr Format Error [RFC1035] ResponseCode::ServFail => "Server Failure", // 2 ServFail Server Failure [RFC1035] ResponseCode::NXDomain => "Non-Existent Domain", // 3 NXDomain Non-Existent Domain [RFC1035] ResponseCode::NotImp => "Not Implemented", // 4 NotImp Not Implemented [RFC1035] ResponseCode::Refused => "Query Refused", // 5 Refused Query Refused [RFC1035] ResponseCode::YXDomain => "Name should not exist", // 6 YXDomain Name Exists when it should not [RFC2136][RFC6672] ResponseCode::YXRRSet => "RR Set should not exist", // 7 YXRRSet RR Set Exists when it should not [RFC2136] ResponseCode::NXRRSet => "RR Set does not exist", // 8 NXRRSet RR Set that should exist does not [RFC2136] ResponseCode::NotAuth => "Not authorized", // 9 NotAuth Server Not Authoritative for zone [RFC2136] ResponseCode::NotZone => "Name not in zone", // 10 NotZone Name not contained in zone [RFC2136] ResponseCode::BADVERS => "Bad option verions", // 16 BADVERS Bad OPT Version [RFC6891] ResponseCode::BADSIG => "TSIG Failure", // 16 BADSIG TSIG Signature Failure [RFC2845] ResponseCode::BADKEY => "Key not recognized", // 17 BADKEY Key not recognized [RFC2845] ResponseCode::BADTIME => "Signature out of time window", // 18 BADTIME Signature out of time window [RFC2845] ResponseCode::BADMODE => "Bad TKEY mode", // 19 BADMODE Bad TKEY Mode [RFC2930] ResponseCode::BADNAME => "Duplicate key name", // 20 BADNAME Duplicate key name [RFC2930] ResponseCode::BADALG => "Algorithm not supported", // 21 BADALG Algorithm not supported [RFC2930] ResponseCode::BADTRUNC => "Bad truncation", // 22 BADTRUNC Bad Truncation [RFC4635] ResponseCode::BADCOOKIE => "Bad server cookie", // 23 BADCOOKIE (TEMPORARY - registered 2015-07-26, expires 2016-07-26) Bad/missing server cookie [draft-ietf-dnsop-cookies] } } } /** * Convert from ResponseCode to u16 * * ``` * use std::convert::From; * use trust_dns::op::response_code::ResponseCode; * * let var: ResponseCode = From::from(0); * assert_eq!(ResponseCode::NoError, var); * * let var: ResponseCode = 0.into(); * assert_eq!(ResponseCode::NoError, var); * ``` */ impl From<ResponseCode> for u16 { fn from(rt: ResponseCode) -> Self { match rt { ResponseCode::NoError => 0, // 0 NoError No Error [RFC1035] ResponseCode::FormErr => 1, // 1 FormErr Format Error [RFC1035] ResponseCode::ServFail => 2, // 2 ServFail Server Failure [RFC1035] ResponseCode::NXDomain => 3, // 3 NXDomain Non-Existent Domain [RFC1035] ResponseCode::NotImp => 4, // 4 NotImp Not Implemented [RFC1035] ResponseCode::Refused => 5, // 5 Refused Query Refused [RFC1035] ResponseCode::YXDomain => 6, // 6 YXDomain Name Exists when it should not [RFC2136][RFC6672] ResponseCode::YXRRSet => 7, // 7 YXRRSet RR Set Exists when it should not [RFC2136] ResponseCode::NXRRSet => 8, // 8 NXRRSet RR Set that should exist does not [RFC2136] ResponseCode::NotAuth => 9, // 9 NotAuth Server Not Authoritative for zone [RFC2136] ResponseCode::NotZone => 10, // 10 NotZone Name not contained in zone [RFC2136] // 11-15 Unassigned ResponseCode::BADVERS => 16, // 16 BADVERS Bad OPT Version [RFC6891] ResponseCode::BADSIG => 16, // 16 BADSIG TSIG Signature Failure [RFC2845] ResponseCode::BADKEY => 17, // 17 BADKEY Key not recognized [RFC2845] ResponseCode::BADTIME => 18, // 18 BADTIME Signature out of time window [RFC2845] ResponseCode::BADMODE => 19, // 19 BADMODE Bad TKEY Mode [RFC2930] ResponseCode::BADNAME => 20, // 20 BADNAME Duplicate key name [RFC2930] ResponseCode::BADALG => 21, // 21 BADALG Algorithm not supported [RFC2930] ResponseCode::BADTRUNC => 22, // 22 BADTRUNC Bad Truncation [RFC4635] ResponseCode::BADCOOKIE => 23, // 23 BADCOOKIE (TEMPORARY - registered 2015-07-26, expires 2016-07-26) Bad/missing server cookie [draft-ietf-dnsop-cookies] } } } /** * Convert from u16 to ResponseCode * * ``` * use std::convert::From; * use trust_dns::op::response_code::ResponseCode; * * let var: u16 = From::from(ResponseCode::NoError); * assert_eq!(0, var); * * let var: u16 = ResponseCode::NoError.into(); * assert_eq!(0, var); * ``` */ impl From<u16> for ResponseCode { fn from(value: u16) -> Self { match value { 0 => ResponseCode::NoError, // 0 NoError No Error [RFC1035] 1 => ResponseCode::FormErr, // 1 FormErr Format Error [RFC1035] 2 => ResponseCode::ServFail, // 2 ServFail Server Failure [RFC1035] 3 => ResponseCode::NXDomain, // 3 NXDomain Non-Existent Domain [RFC1035] 4 => ResponseCode::NotImp, // 4 NotImp Not Implemented [RFC1035] 5 => ResponseCode::Refused, // 5 Refused Query Refused [RFC1035] 6 => ResponseCode::YXDomain, // 6 YXDomain Name Exists when it should not [RFC2136][RFC6672] 7 => ResponseCode::YXRRSet, // 7 YXRRSet RR Set Exists when it should not [RFC2136] 8 => ResponseCode::NXRRSet, // 8 NXRRSet RR Set that should exist does not [RFC2136] 9 => ResponseCode::NotAuth, // 9 NotAuth Server Not Authoritative for zone [RFC2136] 10 => ResponseCode::NotZone, // 10 NotZone Name not contained in zone [RFC2136] // this looks to be backwards compat for 4 bit ResponseCodes. //16 => ResponseCode::BADVERS, // 16 BADVERS Bad OPT Version [RFC6891] 16 => ResponseCode::BADSIG, // 16 BADSIG TSIG Signature Failure [RFC2845] 17 => ResponseCode::BADKEY, // 17 BADKEY Key not recognized [RFC2845] 18 => ResponseCode::BADTIME, // 18 BADTIME Signature out of time window [RFC2845] 19 => ResponseCode::BADMODE, // 19 BADMODE Bad TKEY Mode [RFC2930] 20 => ResponseCode::BADNAME, // 20 BADNAME Duplicate key name [RFC2930] 21 => ResponseCode::BADALG, // 21 BADALG Algorithm not supported [RFC2930] 22 => ResponseCode::BADTRUNC, // 22 BADTRUNC Bad Truncation [RFC4635] 23 => ResponseCode::BADCOOKIE, // 23 BADCOOKIE (TEMPORARY - registered 2015-07-26, expires 2016-07-26) Bad/missing server cookie [draft-ietf-dnsop-cookies] _ => unimplemented!(), } } }