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Some refactoring and implement KEY RR

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This commit is contained in:
Xander Bil 2024-04-05 23:54:06 +02:00
parent 08d4ca82f5
commit 0dc43e2d11
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GPG key ID: EC9706B54A278598
5 changed files with 158 additions and 87 deletions
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4
src/api.rs
View file

@ -11,7 +11,7 @@ use serde::Deserialize;
use tokio::net::TcpListener; use tokio::net::TcpListener;
use crate::db::models::insert_into_database; use crate::db::models::insert_into_database;
use crate::structs::{Class, Type, RR}; use crate::structs::{Class, RRClass, Type, RR};
type GenericError = Box<dyn std::error::Error + Send + Sync>; type GenericError = Box<dyn std::error::Error + Send + Sync>;
type Result<T> = std::result::Result<T, GenericError>; type Result<T> = std::result::Result<T, GenericError>;
@ -41,7 +41,7 @@ async fn create_record(req: Request<hyper::body::Incoming>) -> Result<Response<B
match insert_into_database(RR { match insert_into_database(RR {
name: record.name, name: record.name,
_type: record._type, _type: record._type,
class: Class::IN, class: Class::Class(RRClass::IN),
ttl: record.ttl, ttl: record.ttl,
rdlength: rdata.len() as u16, rdlength: rdata.len() as u16,
rdata, rdata,

18
src/db/models.rs
View file

@ -85,8 +85,8 @@ pub async fn insert_into_database(rr: RR) -> Result<(), DatabaseError> {
let db_connection = &mut establish_connection(); let db_connection = &mut establish_connection();
let record = Record { let record = Record {
name: rr.name.join("."), name: rr.name.join("."),
_type: rr._type as i32, _type: rr._type.into(),
class: rr.class as i32, class: rr.class.into(),
ttl: rr.ttl, ttl: rr.ttl,
rdlength: rr.rdlength as i32, rdlength: rr.rdlength as i32,
rdata: rr.rdata, rdata: rr.rdata,
@ -104,8 +104,8 @@ pub async fn get_from_database(question: &Question) -> Result<Vec<RR>, DatabaseE
let records = Record::get( let records = Record::get(
db_connection, db_connection,
question.qname.join("."), question.qname.join("."),
question.qtype.clone() as i32, question.qtype.clone().into(),
question.qclass.clone() as i32, question.qclass.clone().into(),
) )
.map_err(|e| DatabaseError { .map_err(|e| DatabaseError {
message: e.to_string(), message: e.to_string(),
@ -116,12 +116,8 @@ pub async fn get_from_database(question: &Question) -> Result<Vec<RR>, DatabaseE
.filter_map(|record| { .filter_map(|record| {
Some(RR { Some(RR {
name: record.name.split(".").map(str::to_string).collect(), name: record.name.split(".").map(str::to_string).collect(),
_type: Type::try_from(record._type as u16) _type: Type::from(record._type as u16),
.map_err(|e| DatabaseError { message: e }) class: Class::from(record.class as u16),
.ok()?,
class: Class::try_from(record.class as u16)
.map_err(|e| DatabaseError { message: e })
.ok()?,
ttl: record.ttl, ttl: record.ttl,
rdlength: record.rdlength as u16, rdlength: record.rdlength as u16,
rdata: record.rdata, rdata: record.rdata,
@ -138,5 +134,5 @@ pub async fn delete_from_database(
rdata: Option<Vec<u8>>, rdata: Option<Vec<u8>>,
) { ) {
let db_connection = &mut establish_connection(); let db_connection = &mut establish_connection();
let _ = Record::delete(db_connection, name.join("."), _type.map(|f| f as i32), class as i32, rdata); let _ = Record::delete(db_connection, name.join("."), _type.map(|f| f.into()), class.into(), rdata);
} }

146
src/parser.rs
View file

@ -2,35 +2,64 @@ use std::{mem::size_of, vec};
use crate::{ use crate::{
errors::ParseError, errors::ParseError,
structs::{Class, Header, LabelString, Message, Opcode, OptRR, Question, Type, RR}, structs::{
Class, Header, KeyRData, LabelString, Message, Opcode, OptRR, Question, RRClass, RRType,
Type, RR,
},
}; };
type Result<T> = std::result::Result<T, ParseError>; type Result<T> = std::result::Result<T, ParseError>;
impl TryFrom<u16> for Type { impl From<Type> for u16 {
type Error = String; fn from(value: Type) -> Self {
fn try_from(value: u16) -> std::result::Result<Self, String> {
match value { match value {
//TODO: clean this up Type::Type(t) => t as u16,
x if x == Type::A as u16 => Ok(Type::A), Type::Other(x) => x,
x if x == Type::OPT as u16 => Ok(Type::OPT),
x if x == Type::SOA as u16 => Ok(Type::SOA),
x if x == Type::ANY as u16 => Ok(Type::ANY),
_ => Err(format!("Invalid Type value: {}", value)),
} }
} }
} }
impl TryFrom<u16> for Class { impl From<Type> for i32 {
type Error = String; fn from(value: Type) -> Self {
Into::<u16>::into(value) as i32
}
}
fn try_from(value: u16) -> std::result::Result<Self, String> { impl From<Class> for i32 {
fn from(value: Class) -> Self {
Into::<u16>::into(value) as i32
}
}
impl From<Class> for u16 {
fn from(value: Class) -> Self {
match value { match value {
x if x == Class::IN as u16 => Ok(Class::IN), Class::Class(t) => t as u16,
x if x == Class::ANY as u16 => Ok(Class::ANY), Class::Other(x) => x,
x if x == Class::NONE as u16 => Ok(Class::NONE), }
_ => Err(format!("Invalid Class value: {}", value)), }
}
impl From<u16> for Type {
fn from(value: u16) -> Self {
match value {
x if x == RRType::A as u16 => Type::Type(RRType::A),
x if x == RRType::OPT as u16 => Type::Type(RRType::OPT),
x if x == RRType::SOA as u16 => Type::Type(RRType::SOA),
x if x == RRType::ANY as u16 => Type::Type(RRType::SOA),
x if x == RRType::KEY as u16 => Type::Type(RRType::KEY),
x => Type::Other(x),
}
}
}
impl From<u16> for Class {
fn from(value: u16) -> Self {
match value {
x if x == RRClass::IN as u16 => Class::Class(RRClass::IN),
x if x == RRClass::ANY as u16 => Class::Class(RRClass::ANY),
x if x == RRClass::NONE as u16 => Class::Class(RRClass::NONE),
x => Class::Other(x),
} }
} }
} }
@ -80,7 +109,7 @@ pub fn parse_opt_type(bytes: &[u8]) -> Result<Vec<OptRR>> {
impl Type { impl Type {
pub fn to_data(&self, text: &String) -> Result<Vec<u8>> { pub fn to_data(&self, text: &String) -> Result<Vec<u8>> {
match self { match self {
Type::A => { Type::Type(RRType::A) => {
let arr: Vec<u8> = text let arr: Vec<u8> = text
.split(".") .split(".")
.filter_map(|s| s.parse::<u8>().ok()) .filter_map(|s| s.parse::<u8>().ok())
@ -94,12 +123,12 @@ impl Type {
}) })
} }
} }
_ => todo!() _ => todo!(),
} }
} }
pub fn from_data(&self, bytes: &[u8]) -> Result<String> { pub fn from_data(&self, bytes: &[u8]) -> Result<String> {
match self { match self {
Type::A => { Type::Type(RRType::A) => {
if bytes.len() == 4 { if bytes.len() == 4 {
let arr: Vec<String> = bytes.iter().map(|b| b.to_string()).collect(); let arr: Vec<String> = bytes.iter().map(|b| b.to_string()).collect();
Ok(arr.join(".")) Ok(arr.join("."))
@ -110,7 +139,7 @@ impl Type {
}) })
} }
} }
_ => todo!() _ => todo!(),
} }
} }
} }
@ -210,21 +239,12 @@ impl FromBytes for Question {
}) })
} else { } else {
//Try Parse qtype //Try Parse qtype
let qtype = let qtype = Type::from(u16::from_be_bytes(bytes[*i..*i + 2].try_into().unwrap()));
Type::try_from(u16::from_be_bytes(bytes[*i..*i + 2].try_into().unwrap()))
.map_err(|e| ParseError {
object: String::from("Type"),
message: e,
})?;
//Try Parse qclass //Try Parse qclass
let qclass = Class::try_from(u16::from_be_bytes( let qclass = Class::from(u16::from_be_bytes(
bytes[*i + 2..*i + 4].try_into().unwrap(), bytes[*i + 2..*i + 4].try_into().unwrap(),
)) ));
.map_err(|e| ParseError {
object: String::from("Class"),
message: e,
})?;
*i += 4; // For qtype and qclass => 4 bytes *i += 4; // For qtype and qclass => 4 bytes
@ -239,8 +259,8 @@ impl FromBytes for Question {
fn to_bytes(question: Self) -> Vec<u8> { fn to_bytes(question: Self) -> Vec<u8> {
let mut result = LabelString::to_bytes(question.qname); let mut result = LabelString::to_bytes(question.qname);
result.extend(u16::to_be_bytes(question.qtype.to_owned() as u16)); result.extend(u16::to_be_bytes(question.qtype.into()));
result.extend(u16::to_be_bytes(question.qclass.to_owned() as u16)); result.extend(u16::to_be_bytes(question.qclass.into()));
result result
} }
} }
@ -254,24 +274,16 @@ impl FromBytes for RR {
message: String::from("len of rest of bytes smaller then minimum size"), message: String::from("len of rest of bytes smaller then minimum size"),
}) })
} else { } else {
let _type = Type::try_from(u16::from_be_bytes(bytes[*i..*i + 2].try_into().unwrap())) let _type = Type::from(u16::from_be_bytes(bytes[*i..*i + 2].try_into().unwrap()));
.map_err(|e| ParseError {
object: String::from("Type"),
message: e,
})?;
let class = Class::try_from(u16::from_be_bytes( let class = Class::from(u16::from_be_bytes(
bytes[*i + 2..*i + 4].try_into().unwrap(), bytes[*i + 2..*i + 4].try_into().unwrap(),
)) ));
.map_err(|e| ParseError {
object: String::from("Class"),
message: e,
})?;
let ttl = i32::from_be_bytes(bytes[*i + 4..*i + 8].try_into().unwrap()); let ttl = i32::from_be_bytes(bytes[*i + 4..*i + 8].try_into().unwrap());
let rdlength = u16::from_be_bytes(bytes[*i + 8..*i + 10].try_into().unwrap()); let rdlength = u16::from_be_bytes(bytes[*i + 8..*i + 10].try_into().unwrap());
if bytes.len() - *i - 10 != rdlength as usize { if bytes.len() - *i - 10 < rdlength as usize {
Err(ParseError { Err(ParseError {
object: String::from("RR"), object: String::from("RR"),
message: String::from("len of rest of bytes not equal to rdlength"), message: String::from("len of rest of bytes not equal to rdlength"),
@ -292,8 +304,8 @@ impl FromBytes for RR {
fn to_bytes(rr: Self) -> Vec<u8> { fn to_bytes(rr: Self) -> Vec<u8> {
let mut result = LabelString::to_bytes(rr.name); let mut result = LabelString::to_bytes(rr.name);
result.extend(u16::to_be_bytes(rr._type.to_owned() as u16)); result.extend(u16::to_be_bytes(rr._type.into()));
result.extend(u16::to_be_bytes(rr.class.to_owned() as u16)); result.extend(u16::to_be_bytes(rr.class.into()));
result.extend(i32::to_be_bytes(rr.ttl.to_owned())); result.extend(i32::to_be_bytes(rr.ttl.to_owned()));
result.extend(u16::to_be_bytes(4 as u16)); result.extend(u16::to_be_bytes(4 as u16));
result.extend(rr.rdata); result.extend(rr.rdata);
@ -309,6 +321,8 @@ impl FromBytes for Message {
for _ in 0..header.qdcount { for _ in 0..header.qdcount {
question.push(Question::from_bytes(&bytes, i)?); question.push(Question::from_bytes(&bytes, i)?);
} }
println!("{:#?}", question);
println!("{:#?}", header);
let mut answer = vec![]; let mut answer = vec![];
for _ in 0..header.ancount { for _ in 0..header.ancount {
@ -319,6 +333,7 @@ impl FromBytes for Message {
for _ in 0..header.nscount { for _ in 0..header.nscount {
authority.push(RR::from_bytes(&bytes, i)?); authority.push(RR::from_bytes(&bytes, i)?);
} }
println!("{:#?}", authority);
let mut additional = vec![]; let mut additional = vec![];
for _ in 0..header.arcount { for _ in 0..header.arcount {
@ -353,3 +368,34 @@ impl FromBytes for Message {
result result
} }
} }
impl FromBytes for KeyRData {
fn from_bytes(bytes: &[u8], _: &mut usize) -> Result<Self> {
if bytes.len() < 18 {
Err(ParseError {
object: String::from("KeyRData"),
message: String::from("invalid rdata"),
})
} else {
let mut i = 18;
Ok(KeyRData {
type_covered: u16::from_be_bytes(bytes[0..2].try_into().unwrap()),
algo: bytes[2],
labels: bytes[3],
original_ttl: u32::from_be_bytes(bytes[4..8].try_into().unwrap()),
signature_expiration: u32::from_be_bytes(bytes[8..12].try_into().unwrap()),
signature_inception: u32::from_be_bytes(bytes[12..16].try_into().unwrap()),
key_tag: u16::from_be_bytes(bytes[16..18].try_into().unwrap()),
signer: LabelString::from_bytes(bytes, &mut i)?,
signature: bytes[i..bytes.len()].to_vec(),
})
}
}
fn to_bytes(s: Self) -> Vec<u8>
where
Self: Sized,
{
todo!()
}
}

41
src/resolver.rs
View file

@ -7,7 +7,7 @@ use tokio::net::UdpSocket;
use crate::db::models::{delete_from_database, get_from_database, insert_into_database}; use crate::db::models::{delete_from_database, get_from_database, insert_into_database};
use crate::errors::ParseError; use crate::errors::ParseError;
use crate::parser::FromBytes; use crate::parser::FromBytes;
use crate::structs::{Class, Header, Message, Opcode, Type, RCODE}; use crate::structs::{Class, Header, KeyRData, Message, Opcode, RRClass, RRType, Type, RCODE};
use crate::utils::vec_equal; use crate::utils::vec_equal;
const MAX_DATAGRAM_SIZE: usize = 4096; const MAX_DATAGRAM_SIZE: usize = 4096;
@ -30,7 +30,7 @@ async fn handle_query(message: Message) -> Message {
match answers { match answers {
Ok(rrs) => { Ok(rrs) => {
response.header.flags = set_response_flags(response.header.flags, RCODE::NOERROR); response.header.flags = set_response_flags(response.header.flags, RCODE::NOERROR);
response.header.ancount = 1; response.header.ancount = rrs.len() as u16;
response.answer = rrs response.answer = rrs
} }
Err(e) => { Err(e) => {
@ -47,7 +47,7 @@ async fn handle_update(message: Message) -> Message {
let mut response = message.clone(); let mut response = message.clone();
// Zone section (question) processing // Zone section (question) processing
if (message.header.qdcount != 1) || !matches!(message.question[0].qtype, Type::SOA) { if (message.header.qdcount != 1) || !matches!(message.question[0].qtype, Type::Type(RRType::SOA)) {
response.header.flags = set_response_flags(response.header.flags, RCODE::FORMERR); response.header.flags = set_response_flags(response.header.flags, RCODE::FORMERR);
return response; return response;
} }
@ -61,13 +61,18 @@ async fn handle_update(message: Message) -> Message {
} }
// Check Prerequisite TODO: implement this // Check Prerequisite TODO: implement this
if message.header.ancount > 0 { // if message.header.ancount > 0 {
response.header.flags = set_response_flags(response.header.flags, RCODE::NOTIMP); // response.header.flags = set_response_flags(response.header.flags, RCODE::NOTIMP);
return response; // return response;
} // }
// Check Requestor Permission // Check Requestor Permission
// TODO: implement this, use rfc2931 for rr in &message.additional {
if rr._type == Type::Type(RRType::KEY) {
let key = KeyRData::from_bytes(&rr.rdata, &mut 0).unwrap();
println!("{:#?}",key);
}
}
// Update Section Prescan // Update Section Prescan
for rr in &message.authority { for rr in &message.authority {
@ -79,9 +84,9 @@ async fn handle_update(message: Message) -> Message {
return response; return response;
} }
if (rr.class == Class::ANY && (rr.ttl != 0 || rr.rdlength != 0)) if (rr.class == Class::Class(RRClass::ANY) && (rr.ttl != 0 || rr.rdlength != 0))
|| (rr.class == Class::NONE && rr.ttl != 0) || (rr.class == Class::Class(RRClass::NONE) && rr.ttl != 0)
|| ![Class::NONE, Class::ANY, zone.qclass.clone()].contains(&rr.class) || ![Class::Class(RRClass::NONE), Class::Class(RRClass::ANY), zone.qclass.clone()].contains(&rr.class)
{ {
response.header.flags = set_response_flags(response.header.flags, RCODE::FORMERR); response.header.flags = set_response_flags(response.header.flags, RCODE::FORMERR);
return response; return response;
@ -92,23 +97,23 @@ async fn handle_update(message: Message) -> Message {
for rr in message.authority { for rr in message.authority {
if rr.class == zone.qclass { if rr.class == zone.qclass {
let _ = insert_into_database(rr).await; let _ = insert_into_database(rr).await;
} else if rr.class == Class::ANY { } else if rr.class == Class::Class(RRClass::ANY) {
if rr._type == Type::ANY { if rr._type == Type::Type(RRType::ANY) {
if rr.name == zone.qname { if rr.name == zone.qname {
response.header.flags = response.header.flags =
set_response_flags(response.header.flags, RCODE::NOTIMP); set_response_flags(response.header.flags, RCODE::NOTIMP);
return response; return response;
} else { } else {
delete_from_database(rr.name, None, Class::IN, None).await; delete_from_database(rr.name, None, Class::Class(RRClass::IN), None).await;
} }
} else { } else {
delete_from_database(rr.name, Some(rr._type), Class::IN, None).await; delete_from_database(rr.name, Some(rr._type), Class::Class(RRClass::IN), None).await;
} }
} else if rr.class == Class::NONE { } else if rr.class == Class::Class(RRClass::NONE) {
if rr._type == Type::SOA { if rr._type == Type::Type(RRType::SOA) {
continue; continue;
} }
delete_from_database(rr.name, Some(rr._type),Class::IN, Some(rr.rdata)).await; delete_from_database(rr.name, Some(rr._type), Class::Class(RRClass::IN), Some(rr.rdata)).await;
} }
} }

36
src/structs.rs
View file

@ -1,23 +1,39 @@
use serde::Deserialize; use serde::Deserialize;
#[derive(Debug, Clone, Deserialize, PartialEq)]
pub enum Type {
Type(RRType),
Other(u16)
}
#[repr(u16)] #[repr(u16)]
#[derive(Debug, Clone, Deserialize, PartialEq)] #[derive(Debug, Clone, Deserialize, PartialEq)]
pub enum Type { pub enum RRType {
A = 1, A = 1,
SOA = 6, SOA = 6,
KEY = 24,
OPT = 41, OPT = 41,
ANY = 255 ANY = 255,
}
#[derive(Debug, Clone, PartialEq)]
pub enum Class {
Class(RRClass),
Other(u16)
} }
#[repr(u16)] #[repr(u16)]
#[derive(Debug, Clone, PartialEq)] #[derive(Debug, Clone, PartialEq)]
pub enum Class { pub enum RRClass {
IN = 1, IN = 1,
NONE = 254, NONE = 254,
ANY = 255 ANY = 255,
} }
#[repr(u16)] #[repr(u16)]
#[allow(dead_code)]
pub enum RCODE { pub enum RCODE {
NOERROR = 0, NOERROR = 0,
FORMERR = 1, FORMERR = 1,
@ -83,6 +99,14 @@ pub struct OptRR {
pub type LabelString = Vec<String>; pub type LabelString = Vec<String>;
#[derive(Debug)] #[derive(Debug)]
pub struct Response { pub struct KeyRData {
field: Type, pub type_covered: u16,
pub algo: u8,
pub labels: u8,
pub original_ttl: u32,
pub signature_expiration: u32,
pub signature_inception: u32,
pub key_tag: u16,
pub signer: LabelString,
pub signature: Vec<u8>
} }