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Configurable multiple dns resolvers

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Slatian 2023-08-04 00:00:21 +02:00
parent cd8c0455dc
commit 104a072fd6
7 changed files with 441 additions and 100 deletions
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@ -77,7 +77,7 @@ version = "1.0.0"
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version = "0.42.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
[[package]] [[package]]
name = "windows_x86_64_msvc" name = "windows_x86_64_msvc"
version = "0.48.0" version = "0.48.0"
@ -2344,5 +2579,5 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1" checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1"
dependencies = [ dependencies = [
"cfg-if", "cfg-if",
"windows-sys", "windows-sys 0.48.0",
] ]

2
Cargo.toml
View File

@ -22,5 +22,5 @@ toml = "0.7"
tower = "0.4" tower = "0.4"
tower-http = { version = "0.4", features = ["fs"] } tower-http = { version = "0.4", features = ["fs"] }
trust-dns-proto = "0.22" trust-dns-proto = "0.22"
trust-dns-resolver = { version = "0.22", features = ["dns-over-rustls"] } trust-dns-resolver = { version = "0.22", features = ["dns-over-rustls","dns-over-https","dns-over-quic"] }
maxminddb = "0.23" maxminddb = "0.23"

5
echoip_test.toml
View File

@ -61,3 +61,8 @@ burst = 15
#Note: The ratelimit is implemented using the governor crate #Note: The ratelimit is implemented using the governor crate
[dns.resolver.digitalcourage]
display_name = "Digitalcourage 3"
servers = ["5.9.164.112:853","[2a01:4f8:251:554::2]:853"]
protocol = "Tls"
tls_dns_name = "dns3.digitalcourage.de"

99
src/config/dns.rs Normal file
View File

@ -0,0 +1,99 @@
use serde::{Deserialize,Serialize};
use trust_dns_resolver::config::Protocol;
use trust_dns_resolver::Name;
use std::collections::HashMap;
use std::net::SocketAddr;
#[derive(Deserialize, Clone)]
pub struct DnsConfig {
pub allow_forward_lookup: bool,
pub allow_reverse_lookup: bool,
pub hidden_suffixes: Vec<String>,
#[serde(default="default_dns_resolver_name")]
pub default_resolver: String,
pub resolver: HashMap<String,DnsResolverConfig>,
}
#[derive(Deserialize, Serialize, Clone)]
pub enum DnsProtocol {
Udp,
Tcp,
Tls,
Https,
Quic,
}
pub fn default_dns_resolver_name() -> String {
"default".to_string()
}
#[derive(Deserialize, Serialize, Clone)]
pub struct DnsResolverConfig {
pub display_name: String,
#[serde(default="zero")]
pub weight: i32,
pub servers: Vec<SocketAddr>,
#[serde(default)]
pub search: Vec<String>,
pub protocol: DnsProtocol,
pub tls_dns_name: Option<String>,
pub bind_address: Option<SocketAddr>,
#[serde(default="default_true")]
pub trust_nx_responses: bool,
}
fn zero() -> i32 {
return 0;
}
fn default_true() -> bool {
return true;
}
impl Default for DnsConfig {
fn default() -> Self {
DnsConfig {
allow_forward_lookup: true,
allow_reverse_lookup: false,
hidden_suffixes: Vec::new(),
default_resolver: "default".to_string(),
resolver: Default::default(),
}
}
}
impl Into<Protocol> for DnsProtocol {
fn into(self) -> Protocol {
match self {
Self::Udp => Protocol::Udp,
Self::Tcp => Protocol::Tcp,
Self::Tls => Protocol::Tls,
Self::Https => Protocol::Https,
Self::Quic => Protocol::Quic,
}
}
}
impl DnsResolverConfig {
pub fn to_trust_resolver_config(&self) -> trust_dns_resolver::config::ResolverConfig {
let mut resolver = trust_dns_resolver::config::ResolverConfig::new();
for server in &self.servers {
resolver.add_name_server(trust_dns_resolver::config::NameServerConfig{
socket_addr: *server,
protocol: self.protocol.clone().into(),
tls_dns_name: self.tls_dns_name.clone(),
trust_nx_responses: self.trust_nx_responses,
tls_config: None,
bind_addr: self.bind_address,
});
}
for search in &self.search {
if let Ok(name) = Name::from_str_relaxed(search) {
resolver.add_search(name);
}
}
return resolver;
}
}

35
src/config.rs → src/config/mod.rs
View File

@ -1,8 +1,14 @@
use axum_client_ip::SecureClientIpSource; use axum_client_ip::SecureClientIpSource;
use serde::Deserialize;
use std::net::SocketAddr; use std::net::SocketAddr;
use std::num::NonZeroU32; use std::num::NonZeroU32;
#[derive(serde::Deserialize, Default, Clone)] mod dns;
pub use crate::config::dns::{DnsConfig, DnsProtocol, DnsResolverConfig};
#[derive(Deserialize, Default, Clone)]
pub struct EchoIpServiceConfig { pub struct EchoIpServiceConfig {
pub server: ServerConfig, pub server: ServerConfig,
pub dns: DnsConfig, pub dns: DnsConfig,
@ -11,7 +17,7 @@ pub struct EchoIpServiceConfig {
pub ratelimit: RatelimitConfig, pub ratelimit: RatelimitConfig,
} }
#[derive(serde::Deserialize, Clone)] #[derive(Deserialize, Clone)]
pub struct ServerConfig { pub struct ServerConfig {
pub listen_on: SocketAddr, pub listen_on: SocketAddr,
pub ip_header: SecureClientIpSource, pub ip_header: SecureClientIpSource,
@ -20,33 +26,27 @@ pub struct ServerConfig {
pub static_location: Option<String>, pub static_location: Option<String>,
} }
#[derive(serde::Deserialize, Clone)]
pub struct DnsConfig {
pub allow_forward_lookup: bool,
pub allow_reverse_lookup: bool,
pub hidden_suffixes: Vec<String>,
//Future Idea: allow custom resolver
}
#[derive(serde::Deserialize, Clone)] #[derive(Deserialize, Clone)]
pub struct GeoIpConfig { pub struct GeoIpConfig {
pub asn_database: Option<String>, pub asn_database: Option<String>,
pub location_database: Option<String>, pub location_database: Option<String>,
} }
#[derive(serde::Deserialize, Clone)] #[derive(Deserialize, Clone)]
pub struct TemplateConfig { pub struct TemplateConfig {
pub template_location: String, pub template_location: String,
pub extra_config: Option<String>, pub extra_config: Option<String>,
pub text_user_agents: Vec<String>, pub text_user_agents: Vec<String>,
} }
#[derive(serde::Deserialize, Clone)] #[derive(Deserialize, Clone)]
pub struct RatelimitConfig { pub struct RatelimitConfig {
pub per_minute: NonZeroU32, pub per_minute: NonZeroU32,
pub burst: NonZeroU32, pub burst: NonZeroU32,
} }
impl Default for ServerConfig { impl Default for ServerConfig {
fn default() -> Self { fn default() -> Self {
ServerConfig { ServerConfig {
@ -58,16 +58,6 @@ impl Default for ServerConfig {
} }
} }
impl Default for DnsConfig {
fn default() -> Self {
DnsConfig {
allow_forward_lookup: true,
allow_reverse_lookup: false,
hidden_suffixes: Vec::new(),
}
}
}
impl Default for GeoIpConfig { impl Default for GeoIpConfig {
fn default() -> Self { fn default() -> Self {
GeoIpConfig { GeoIpConfig {
@ -95,3 +85,4 @@ impl Default for RatelimitConfig {
} }
} }
} }

117
src/main.rs
View File

@ -18,14 +18,11 @@ use axum_client_ip::SecureClientIp;
use clap::Parser; use clap::Parser;
use lazy_static::lazy_static; use lazy_static::lazy_static;
use regex::Regex; use regex::Regex;
use serde::{Deserialize,Serialize};
use tera::Tera; use tera::Tera;
use tower::ServiceBuilder; use tower::ServiceBuilder;
use tower_http::services::ServeDir; use tower_http::services::ServeDir;
use trust_dns_resolver::{ use trust_dns_resolver::TokioAsyncResolver;
TokioAsyncResolver,
// config::ResolverOpts,
// config::ResolverConfig,
};
use tokio::signal::unix::{ use tokio::signal::unix::{
signal, signal,
@ -62,28 +59,26 @@ use crate::templating_engine::{
use crate::ipinfo::{AddressCast,AddressInfo,AddressScope}; use crate::ipinfo::{AddressCast,AddressInfo,AddressScope};
#[derive(serde::Deserialize, serde::Serialize, Clone)] #[derive(Deserialize, Serialize, Clone)]
pub struct SettingsQuery { pub struct SettingsQuery {
format: Option<ResponseFormat>, format: Option<ResponseFormat>,
lang: Option<String>, lang: Option<String>,
dns: Option<String>,
} }
#[derive(serde::Deserialize, serde::Serialize, Clone)] #[derive(Clone, Serialize)]
pub struct QuerySettings {
#[serde(skip)]
template: TemplateSettings,
dns_resolver_id: String,
}
#[derive(Deserialize, Serialize, Clone)]
pub struct SearchQuery { pub struct SearchQuery {
query: Option<String>, query: Option<String>,
} }
pub fn default_dns_name() -> String { #[derive(Serialize, Clone)]
"default".to_string()
}
#[derive(serde::Deserialize, serde::Serialize, Clone)]
pub struct ResolverQuery {
#[serde(default="default_dns_name")]
dns: String,
}
#[derive(serde::Deserialize, serde::Serialize, Clone)]
pub struct IpResult { pub struct IpResult {
address: IpAddr, address: IpAddr,
hostname: Option<String>, hostname: Option<String>,
@ -95,7 +90,7 @@ pub struct IpResult {
// We need this one to hide the partial lookup field when irelevant // We need this one to hide the partial lookup field when irelevant
pub fn not(b: &bool) -> bool { !b } pub fn not(b: &bool) -> bool { !b }
#[derive(serde::Deserialize, serde::Serialize, Default, Clone)] #[derive(Serialize, Default, Clone)]
pub struct DigResult { pub struct DigResult {
records: simple_dns::DnsLookupResult, records: simple_dns::DnsLookupResult,
#[serde(skip_serializing_if = "IdnaName::was_ascii")] #[serde(skip_serializing_if = "IdnaName::was_ascii")]
@ -239,7 +234,7 @@ async fn main() {
// Initalize DNS resolver with os defaults // Initalize DNS resolver with os defaults
println!("Initalizing dns resolver ..."); println!("Initalizing dns resolver ...");
println!("Using System configuration ..."); println!("Initalizing System resolver ...");
let res = TokioAsyncResolver::tokio_from_system_conf(); let res = TokioAsyncResolver::tokio_from_system_conf();
//let res = TokioAsyncResolver::tokio(ResolverConfig::default(), ResolverOpts::default()); //let res = TokioAsyncResolver::tokio(ResolverConfig::default(), ResolverOpts::default());
let dns_resolver = match res { let dns_resolver = match res {
@ -269,6 +264,15 @@ async fn main() {
let mut dns_resolver_map: HashMap<String,TokioAsyncResolver> = HashMap::new(); let mut dns_resolver_map: HashMap<String,TokioAsyncResolver> = HashMap::new();
for (key, resolver_config) in &config.dns.resolver {
println!("Initalizing {} resolver ...", key);
let resolver = TokioAsyncResolver::tokio(
resolver_config.to_trust_resolver_config(),
Default::default()
).unwrap();
dns_resolver_map.insert(key.clone(), resolver);
}
dns_resolver_map.insert("default".to_string(), dns_resolver); dns_resolver_map.insert("default".to_string(), dns_resolver);
dns_resolver_map.insert("quad9".to_string(), quad9_resolver); dns_resolver_map.insert("quad9".to_string(), quad9_resolver);
dns_resolver_map.insert("google".to_string(), google_resolver); dns_resolver_map.insert("google".to_string(), google_resolver);
@ -327,7 +331,7 @@ async fn main() {
config.ratelimit.per_minute, config.ratelimit.burst)) config.ratelimit.per_minute, config.ratelimit.burst))
.layer(middleware::from_fn(ratelimit::rate_limit_middleware)) .layer(middleware::from_fn(ratelimit::rate_limit_middleware))
.layer(Extension(config)) .layer(Extension(config))
.layer(middleware::from_fn(format_and_language_middleware)) .layer(middleware::from_fn(settings_query_middleware))
) )
; ;
@ -340,7 +344,7 @@ async fn main() {
} }
async fn format_and_language_middleware<B>( async fn settings_query_middleware<B>(
Query(query): Query<SettingsQuery>, Query(query): Query<SettingsQuery>,
Extension(config): Extension<config::EchoIpServiceConfig>, Extension(config): Extension<config::EchoIpServiceConfig>,
user_agent_header: Option<TypedHeader<headers::UserAgent>>, user_agent_header: Option<TypedHeader<headers::UserAgent>>,
@ -361,9 +365,12 @@ async fn format_and_language_middleware<B>(
} }
} }
// Add the request settings extension // Add the request settings extension
req.extensions_mut().insert(TemplateSettings{ req.extensions_mut().insert(QuerySettings{
format: format.unwrap_or(ResponseFormat::TextHtml), template: TemplateSettings{
lang: query.lang.unwrap_or("en".to_string()), format: format.unwrap_or(ResponseFormat::TextHtml),
lang: query.lang.unwrap_or("en".to_string()),
},
dns_resolver_id: query.dns.unwrap_or(config.dns.default_resolver),
}); });
next.run(req).await next.run(req).await
} }
@ -404,9 +411,8 @@ async fn user_agent_handler(
async fn handle_default_route( async fn handle_default_route(
Query(search_query): Query<SearchQuery>, Query(search_query): Query<SearchQuery>,
Query(resolver_settings): Query<ResolverQuery>,
State(arc_state): State<Arc<ServiceSharedState>>, State(arc_state): State<Arc<ServiceSharedState>>,
Extension(settings): Extension<TemplateSettings>, Extension(settings): Extension<QuerySettings>,
user_agent_header: Option<TypedHeader<headers::UserAgent>>, user_agent_header: Option<TypedHeader<headers::UserAgent>>,
SecureClientIp(address): SecureClientIp SecureClientIp(address): SecureClientIp
) -> Response { ) -> Response {
@ -419,13 +425,12 @@ async fn handle_default_route(
search_query, search_query,
false, false,
settings, settings,
resolver_settings,
state state
).await; ).await;
} }
} }
let result = get_ip_result(&address, &settings.lang, &"default".to_string(), &state).await; let result = get_ip_result(&address, &settings.template.lang, &"default".to_string(), &state).await;
let user_agent: Option<String> = match user_agent_header { let user_agent: Option<String> = match user_agent_header {
Some(TypedHeader(user_agent)) => Some(user_agent.to_string()), Some(TypedHeader(user_agent)) => Some(user_agent.to_string()),
@ -433,7 +438,7 @@ async fn handle_default_route(
}; };
state.templating_engine.render_view( state.templating_engine.render_view(
&settings, &settings.template,
&View::Index{ &View::Index{
result: result, result: result,
user_agent: user_agent, user_agent: user_agent,
@ -445,15 +450,16 @@ async fn handle_default_route(
async fn handle_search_request( async fn handle_search_request(
search_query: String, search_query: String,
this_should_have_been_an_ip: bool, this_should_have_been_an_ip: bool,
settings: TemplateSettings, settings: QuerySettings,
resolver_settings: ResolverQuery,
arc_state: Arc<ServiceSharedState>, arc_state: Arc<ServiceSharedState>,
) -> Response { ) -> Response {
let search_query = search_query.trim(); let mut search_query = search_query.trim().to_string();
let mut settings = settings;
lazy_static!{ lazy_static!{
static ref ASN_REGEX: Regex = Regex::new(r"^[Aa][Ss][Nn]?\s*(\d{1,7})$").unwrap(); static ref ASN_REGEX: Regex = Regex::new(r"^[Aa][Ss][Nn]?\s*(\d{1,7})$").unwrap();
static ref VIA_REGEX: Regex = Regex::new(r"[Vv][Ii][Aa]\s+(\S+)").unwrap();
} }
//If someone asked for an asn, give an asn answer //If someone asked for an asn, give an asn answer
@ -462,22 +468,31 @@ async fn handle_search_request(
// Render a dummy template that can at least link to other pages // Render a dummy template that can at least link to other pages
let state = Arc::clone(&arc_state); let state = Arc::clone(&arc_state);
return state.templating_engine.render_view( return state.templating_engine.render_view(
&settings, &settings.template,
&View::Asn{asn: asn}, &View::Asn{asn: asn},
).await ).await
} }
} }
if let Some(via_cap) = VIA_REGEX.captures(&search_query) {
if let Some(via) = via_cap.get(1).map(|c| c.as_str().to_string()) {
let state = Arc::clone(&arc_state);
if state.dns_resolvers.contains_key(&via) {
settings.dns_resolver_id = via;
}
}
search_query = VIA_REGEX.replace(&search_query,"").trim().to_string();
}
// Try to interpret as an IP-Address // Try to interpret as an IP-Address
if let Ok(address) = search_query.parse() { if let Ok(address) = search_query.parse() {
return handle_ip_request(address, settings, resolver_settings, arc_state).await; return handle_ip_request(address, settings, arc_state).await;
} }
// Fall back to treating it as a hostname // Fall back to treating it as a hostname
return handle_dig_request( return handle_dig_request(
search_query.to_string(), search_query,
settings, settings,
resolver_settings,
arc_state, arc_state,
!this_should_have_been_an_ip, !this_should_have_been_an_ip,
).await ).await
@ -485,34 +500,32 @@ async fn handle_search_request(
} }
async fn handle_ip_route_with_path( async fn handle_ip_route_with_path(
Extension(settings): Extension<TemplateSettings>, Extension(settings): Extension<QuerySettings>,
State(arc_state): State<Arc<ServiceSharedState>>, State(arc_state): State<Arc<ServiceSharedState>>,
Query(resolver_settings): Query<ResolverQuery>,
extract::Path(query): extract::Path<String>, extract::Path(query): extract::Path<String>,
) -> Response { ) -> Response {
if let Ok(address) = query.parse() { if let Ok(address) = query.parse() {
return handle_ip_request(address, settings, resolver_settings, arc_state).await return handle_ip_request(address, settings, arc_state).await
} else { } else {
return handle_search_request(query, true, settings, resolver_settings, arc_state).await; return handle_search_request(query, true, settings, arc_state).await;
} }
} }
async fn handle_ip_request( async fn handle_ip_request(
address: IpAddr, address: IpAddr,
settings: TemplateSettings, settings: QuerySettings,
resolver_settings: ResolverQuery,
arc_state: Arc<ServiceSharedState>, arc_state: Arc<ServiceSharedState>,
) -> Response { ) -> Response {
let state = Arc::clone(&arc_state); let state = Arc::clone(&arc_state);
let result = get_ip_result( let result = get_ip_result(
&address, &address,
&settings.lang, &settings.template.lang,
&resolver_settings.dns, &settings.dns_resolver_id,
&state).await; &state).await;
state.templating_engine.render_view( state.templating_engine.render_view(
&settings, &settings.template,
&View::Ip{result: result} &View::Ip{result: result}
).await ).await
} }
@ -580,18 +593,16 @@ async fn get_ip_result(
} }
async fn handle_dig_route_with_path( async fn handle_dig_route_with_path(
Query(resolver_settings): Query<ResolverQuery>, Extension(settings): Extension<QuerySettings>,
Extension(settings): Extension<TemplateSettings>,
State(arc_state): State<Arc<ServiceSharedState>>, State(arc_state): State<Arc<ServiceSharedState>>,
extract::Path(name): extract::Path<String>, extract::Path(name): extract::Path<String>,
) -> Response { ) -> Response {
return handle_dig_request(name, settings, resolver_settings, arc_state, true).await return handle_dig_request(name, settings, arc_state, true).await
} }
async fn handle_dig_request( async fn handle_dig_request(
dig_query: String, dig_query: String,
settings: TemplateSettings, settings: QuerySettings,
resolver_settings: ResolverQuery,
arc_state: Arc<ServiceSharedState>, arc_state: Arc<ServiceSharedState>,
do_full_lookup: bool, do_full_lookup: bool,
) -> Response { ) -> Response {
@ -600,13 +611,13 @@ async fn handle_dig_request(
let dig_result = get_dig_result( let dig_result = get_dig_result(
&dig_query, &dig_query,
&resolver_settings.dns, &settings.dns_resolver_id,
&state, &state,
do_full_lookup do_full_lookup
).await; ).await;
state.templating_engine.render_view( state.templating_engine.render_view(
&settings, &settings.template,
&View::Dig{ query: dig_query, result: dig_result} &View::Dig{ query: dig_query, result: dig_result}
).await ).await

6
src/templating_engine.rs
View File

@ -58,7 +58,7 @@ pub struct TemplateSettings {
/* The echoip view */ /* The echoip view */
#[derive(serde::Deserialize, serde::Serialize, Clone)] #[derive(serde::Serialize, Clone)]
#[serde(untagged)] #[serde(untagged)]
pub enum View { pub enum View {
Asn { asn: u32 }, Asn { asn: u32 },
@ -116,10 +116,10 @@ impl Engine {
_ => text.into_response(), _ => text.into_response(),
} }
Err(e) => { Err(e) => {
println!("There was an error while rendering template {template_name}: {e:?}"); println!("There was an error while rendering template {}: {e:?}", view.template_name());
( (
StatusCode::INTERNAL_SERVER_ERROR, StatusCode::INTERNAL_SERVER_ERROR,
format!("Template error in {template_name}, contact owner or see logs.\n") format!("Template error in {}, contact owner or see logs.\n", view.template_name())
).into_response() ).into_response()
} }
} }