rama/cli/service/
ip.rs

1//! IP '[`Service`] that echos the client IP either over http or directly over tcp.
2//!
3//! [`Service`]: crate::Service
4
5use crate::{
6    Layer, Service,
7    cli::ForwardKind,
8    combinators::Either,
9    combinators::Either7,
10    error::{BoxError, OpaqueError},
11    extensions::{ExtensionsMut, ExtensionsRef},
12    http::{
13        Request, Response, StatusCode,
14        headers::exotic::XClacksOverhead,
15        headers::forwarded::{CFConnectingIp, ClientIp, TrueClientIp, XClientIp, XRealIp},
16        headers::{Accept, HeaderMapExt},
17        layer::{
18            forwarded::GetForwardedHeaderLayer, required_header::AddRequiredResponseHeadersLayer,
19            set_header::SetResponseHeaderLayer, trace::TraceLayer,
20        },
21        mime,
22        server::HttpServer,
23        service::web::response::{Html, IntoResponse, Json, Redirect},
24    },
25    layer::limit::policy::UnlimitedPolicy,
26    layer::{ConsumeErrLayer, LimitLayer, TimeoutLayer, limit::policy::ConcurrentPolicy},
27    net::forwarded::Forwarded,
28    net::stream::{SocketInfo, layer::http::BodyLimitLayer},
29    proxy::haproxy::server::HaProxyLayer,
30    rt::Executor,
31    stream::Stream,
32    tcp::TcpStream,
33    telemetry::tracing,
34};
35
36#[cfg(all(feature = "rustls", not(feature = "boring")))]
37use crate::tls::rustls::server::{TlsAcceptorData, TlsAcceptorLayer};
38
39#[cfg(any(feature = "rustls", feature = "boring"))]
40use crate::http::headers::StrictTransportSecurity;
41
42#[cfg(feature = "boring")]
43use crate::{
44    net::tls::server::ServerConfig,
45    tls::boring::server::{TlsAcceptorData, TlsAcceptorLayer},
46};
47
48#[cfg(feature = "boring")]
49type TlsConfig = ServerConfig;
50
51#[cfg(all(feature = "rustls", not(feature = "boring")))]
52type TlsConfig = TlsAcceptorData;
53
54use std::{convert::Infallible, marker::PhantomData, net::IpAddr, time::Duration};
55use tokio::io::AsyncWriteExt;
56
57#[derive(Debug, Clone)]
58/// Builder that can be used to run your own ip [`Service`],
59/// echo'ing back the client IP over http or tcp.
60pub struct IpServiceBuilder<M> {
61    #[cfg(any(feature = "rustls", feature = "boring"))]
62    tls_server_config: Option<TlsConfig>,
63    concurrent_limit: usize,
64    timeout: Duration,
65    forward: Option<ForwardKind>,
66    _mode: PhantomData<fn(M)>,
67}
68
69impl IpServiceBuilder<mode::Http> {
70    /// Create a new [`IpServiceBuilder`], echoing the IP back over L4.
71    #[must_use]
72    pub fn http() -> Self {
73        Self {
74            #[cfg(any(feature = "rustls", feature = "boring"))]
75            tls_server_config: None,
76            concurrent_limit: 0,
77            timeout: Duration::ZERO,
78            forward: None,
79            _mode: PhantomData,
80        }
81    }
82}
83
84impl IpServiceBuilder<mode::Transport> {
85    /// Create a new [`IpServiceBuilder`], echoing the IP back over L4.
86    #[must_use]
87    pub fn tcp() -> Self {
88        Self {
89            #[cfg(any(feature = "rustls", feature = "boring"))]
90            tls_server_config: None,
91            concurrent_limit: 0,
92            timeout: Duration::ZERO,
93            forward: None,
94            _mode: PhantomData,
95        }
96    }
97}
98
99impl<M> IpServiceBuilder<M> {
100    crate::utils::macros::generate_set_and_with! {
101        /// set the number of concurrent connections to allow
102        #[must_use]
103        pub fn concurrent(mut self, limit: usize) -> Self {
104            self.concurrent_limit = limit;
105            self
106        }
107    }
108
109    crate::utils::macros::generate_set_and_with! {
110        /// set the timeout in seconds for each connection
111        #[must_use]
112        pub fn timeout(mut self, timeout: Duration) -> Self {
113            self.timeout = timeout;
114            self
115        }
116    }
117
118    crate::utils::macros::generate_set_and_with! {
119        /// maybe enable support for one of the following "forward" headers or protocols
120        ///
121        /// Supported headers:
122        ///
123        /// Forwarded ("for="), X-Forwarded-For
124        ///
125        /// X-Client-IP Client-IP, X-Real-IP
126        ///
127        /// CF-Connecting-IP, True-Client-IP
128        ///
129        /// Or using HaProxy protocol.
130        #[must_use]
131        pub fn forward(mut self, maybe_kind: Option<ForwardKind>) -> Self {
132            self.forward = maybe_kind;
133            self
134        }
135    }
136
137    crate::utils::macros::generate_set_and_with! {
138        #[cfg(any(feature = "rustls", feature = "boring"))]
139        /// define a tls server cert config to be used for tls terminaton
140        /// by the IP service.
141        pub fn tls_server_config(mut self, cfg: Option<TlsConfig>) -> Self {
142            self.tls_server_config = cfg;
143            self
144        }
145    }
146}
147
148impl IpServiceBuilder<mode::Http> {
149    #[allow(unused_mut)]
150    #[inline]
151    /// build a tcp service ready to echo the client IP back
152    pub fn build(
153        mut self,
154        executor: Executor,
155    ) -> Result<impl Service<TcpStream, Response = (), Error = Infallible>, BoxError> {
156        #[cfg(all(feature = "rustls", not(feature = "boring")))]
157        let tls_cfg = self.tls_server_config.take();
158
159        #[cfg(feature = "boring")]
160        let tls_cfg: Option<TlsAcceptorData> = match self.tls_server_config.take() {
161            Some(cfg) => Some(cfg.try_into()?),
162            None => None,
163        };
164
165        #[cfg(any(feature = "rustls", feature = "boring"))]
166        {
167            let maybe_tls_acceptor_layer = tls_cfg.map(TlsAcceptorLayer::new);
168            self.build_http(executor, maybe_tls_acceptor_layer)
169        }
170
171        #[cfg(not(any(feature = "rustls", feature = "boring")))]
172        self.build_http(executor)
173    }
174}
175
176#[derive(Debug, Clone)]
177#[non_exhaustive]
178/// The inner http ip-service used by the [`IpServiceBuilder`].
179struct HttpIpService;
180
181impl Service<Request> for HttpIpService {
182    type Response = Response;
183    type Error = BoxError;
184
185    async fn serve(&self, req: Request) -> Result<Self::Response, Self::Error> {
186        let norm_req_path = req.uri().path().trim_matches('/');
187        if !norm_req_path.is_empty() {
188            tracing::debug!("unexpected request path '{norm_req_path}', redirect to root");
189            return Ok(Redirect::permanent("/").into_response());
190        }
191
192        let peer_ip = req
193            .extensions()
194            .get::<Forwarded>()
195            .and_then(|f| f.client_ip())
196            .or_else(|| {
197                req.extensions()
198                    .get::<SocketInfo>()
199                    .map(|s| s.peer_addr().ip())
200            });
201
202        Ok(match peer_ip {
203            Some(ip) => match HttpBodyContentFormat::derive_from_req(&req) {
204                HttpBodyContentFormat::Txt => ip.to_string().into_response(),
205                HttpBodyContentFormat::Html => format_html_page(ip).into_response(),
206                HttpBodyContentFormat::Json => Json(serde_json::json!({
207                    "ip": ip,
208                }))
209                .into_response(),
210            },
211            None => StatusCode::INTERNAL_SERVER_ERROR.into_response(),
212        })
213    }
214}
215
216#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
217enum HttpBodyContentFormat {
218    #[default]
219    Txt,
220    Html,
221    Json,
222}
223
224impl HttpBodyContentFormat {
225    fn derive_from_req(req: &Request) -> Self {
226        let Some(accept) = req.headers().typed_get::<Accept>() else {
227            return Self::default();
228        };
229        accept
230            .iter()
231            .find_map(|qv| {
232                let r#type = qv.value.subtype();
233                if r#type == mime::JSON {
234                    Some(Self::Json)
235                } else if r#type == mime::HTML {
236                    Some(Self::Html)
237                } else if r#type == mime::TEXT {
238                    Some(Self::Txt)
239                } else {
240                    None
241                }
242            })
243            .unwrap_or_default()
244    }
245}
246
247#[derive(Debug, Clone)]
248#[non_exhaustive]
249/// The inner tcp echo-service used by the [`IpServiceBuilder`].
250struct TcpIpService;
251
252impl<Input> Service<Input> for TcpIpService
253where
254    Input: Stream + Unpin + ExtensionsRef,
255{
256    type Response = ();
257    type Error = BoxError;
258
259    async fn serve(&self, stream: Input) -> Result<Self::Response, Self::Error> {
260        tracing::info!("connection received");
261        let peer_ip = stream
262            .extensions()
263            .get::<Forwarded>()
264            .and_then(|f| f.client_ip())
265            .or_else(|| {
266                stream
267                    .extensions()
268                    .get::<SocketInfo>()
269                    .map(|s| s.peer_addr().ip())
270            });
271        let Some(peer_ip) = peer_ip else {
272            tracing::error!("missing peer information");
273            return Ok(());
274        };
275
276        let mut stream = std::pin::pin!(stream);
277
278        match peer_ip {
279            std::net::IpAddr::V4(ip) => {
280                if let Err(err) = stream.write_all(&ip.octets()).await {
281                    tracing::error!("error writing IPv4 of peer to peer: {}", err);
282                }
283            }
284            std::net::IpAddr::V6(ip) => {
285                if let Err(err) = stream.write_all(&ip.octets()).await {
286                    tracing::error!("error writing IPv6 of peer to peer: {}", err);
287                }
288            }
289        };
290
291        Ok(())
292    }
293}
294
295impl IpServiceBuilder<mode::Transport> {
296    #[allow(unused_mut)]
297    #[inline]
298    /// build a tcp service ready to echo client IP back
299    pub fn build(
300        mut self,
301    ) -> Result<impl Service<TcpStream, Response = (), Error = Infallible>, BoxError> {
302        #[cfg(all(feature = "rustls", not(feature = "boring")))]
303        let tls_cfg = self.tls_server_config.take();
304
305        #[cfg(feature = "boring")]
306        let tls_cfg: Option<TlsAcceptorData> = match self.tls_server_config.take() {
307            Some(cfg) => Some(cfg.try_into()?),
308            None => None,
309        };
310
311        #[cfg(any(feature = "rustls", feature = "boring"))]
312        {
313            let maybe_tls_acceptor_layer = tls_cfg.map(TlsAcceptorLayer::new);
314            self.build_tcp(maybe_tls_acceptor_layer)
315        }
316
317        #[cfg(not(any(feature = "rustls", feature = "boring")))]
318        self.build_tcp()
319    }
320}
321
322impl<M> IpServiceBuilder<M> {
323    fn build_tcp<S: Stream + ExtensionsMut + Unpin + Send + Sync + 'static>(
324        self,
325        #[cfg(any(feature = "rustls", feature = "boring"))] maybe_tls_accept_layer: Option<
326            TlsAcceptorLayer,
327        >,
328    ) -> Result<impl Service<S, Response = (), Error = Infallible>, BoxError> {
329        let tcp_forwarded_layer = match &self.forward {
330            None => None,
331            Some(ForwardKind::HaProxy) => Some(HaProxyLayer::default()),
332            Some(other) => {
333                return Err(OpaqueError::from_display(format!(
334                    "invalid forward kind for Transport mode: {other:?}"
335                ))
336                .into());
337            }
338        };
339
340        let tcp_service_builder = (
341            ConsumeErrLayer::trace(tracing::Level::DEBUG),
342            LimitLayer::new(if self.concurrent_limit > 0 {
343                Either::A(ConcurrentPolicy::max(self.concurrent_limit))
344            } else {
345                Either::B(UnlimitedPolicy::new())
346            }),
347            if !self.timeout.is_zero() {
348                TimeoutLayer::new(self.timeout)
349            } else {
350                TimeoutLayer::never()
351            },
352            tcp_forwarded_layer,
353            #[cfg(any(feature = "rustls", feature = "boring"))]
354            maybe_tls_accept_layer,
355        );
356
357        Ok(tcp_service_builder.into_layer(TcpIpService))
358    }
359
360    fn build_http<S: Stream + Unpin + Send + Sync + ExtensionsMut + 'static>(
361        self,
362        executor: Executor,
363        #[cfg(any(feature = "rustls", feature = "boring"))] maybe_tls_accept_layer: Option<
364            TlsAcceptorLayer,
365        >,
366    ) -> Result<impl Service<S, Response = (), Error = Infallible>, BoxError> {
367        let (tcp_forwarded_layer, http_forwarded_layer) = match &self.forward {
368            None => (None, None),
369            Some(ForwardKind::Forwarded) => {
370                (None, Some(Either7::A(GetForwardedHeaderLayer::forwarded())))
371            }
372            Some(ForwardKind::XForwardedFor) => (
373                None,
374                Some(Either7::B(GetForwardedHeaderLayer::x_forwarded_for())),
375            ),
376            Some(ForwardKind::XClientIp) => (
377                None,
378                Some(Either7::C(GetForwardedHeaderLayer::<XClientIp>::new())),
379            ),
380            Some(ForwardKind::ClientIp) => (
381                None,
382                Some(Either7::D(GetForwardedHeaderLayer::<ClientIp>::new())),
383            ),
384            Some(ForwardKind::XRealIp) => (
385                None,
386                Some(Either7::E(GetForwardedHeaderLayer::<XRealIp>::new())),
387            ),
388            Some(ForwardKind::CFConnectingIp) => (
389                None,
390                Some(Either7::F(GetForwardedHeaderLayer::<CFConnectingIp>::new())),
391            ),
392            Some(ForwardKind::TrueClientIp) => (
393                None,
394                Some(Either7::G(GetForwardedHeaderLayer::<TrueClientIp>::new())),
395            ),
396            Some(ForwardKind::HaProxy) => (Some(HaProxyLayer::default()), None),
397        };
398
399        #[cfg(any(feature = "rustls", feature = "boring"))]
400        let hsts_layer = maybe_tls_accept_layer.is_some().then(|| {
401            SetResponseHeaderLayer::if_not_present_typed(
402                StrictTransportSecurity::excluding_subdomains(Duration::from_secs(31536000)),
403            )
404        });
405
406        let tcp_service_builder = (
407            ConsumeErrLayer::trace(tracing::Level::DEBUG),
408            (self.concurrent_limit > 0)
409                .then(|| LimitLayer::new(ConcurrentPolicy::max(self.concurrent_limit))),
410            (!self.timeout.is_zero()).then(|| TimeoutLayer::new(self.timeout)),
411            tcp_forwarded_layer,
412            // Limit the body size to 1MB for requests
413            BodyLimitLayer::request_only(1024 * 1024),
414            #[cfg(any(feature = "rustls", feature = "boring"))]
415            maybe_tls_accept_layer,
416        );
417
418        let http_service = (
419            TraceLayer::new_for_http(),
420            SetResponseHeaderLayer::<XClacksOverhead>::if_not_present_default_typed(),
421            AddRequiredResponseHeadersLayer::default(),
422            ConsumeErrLayer::default(),
423            #[cfg(any(feature = "rustls", feature = "boring"))]
424            hsts_layer,
425            http_forwarded_layer,
426        )
427            .into_layer(HttpIpService);
428
429        Ok(tcp_service_builder.into_layer(HttpServer::auto(executor).service(http_service)))
430    }
431}
432
433pub mod mode {
434    //! operation modes of the ip service
435
436    #[derive(Debug, Clone)]
437    #[non_exhaustive]
438    /// Default mode of the Ip service, echo'ng the info back over http
439    pub struct Http;
440
441    #[derive(Debug, Clone)]
442    #[non_exhaustive]
443    /// Alternative mode of the Ip service, echo'ng the ip info over tcp
444    pub struct Transport;
445}
446
447fn format_html_page(ip: IpAddr) -> Html<String> {
448    Html(format!(
449        r##"<!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <meta name="viewport" content="width=device-width,initial-scale=1" /> <link rel="icon" href="data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'><text y='0.9em' font-size='90'>🦙</text></svg>" /> <title>Rama IP</title> <style> *, *::before, *::after {{ box-sizing: border-box; }} :root{{ --bg:#000; --panel:#0f0f0f; --green:#45d23a; --muted:#bfbfbf; }} html,body{{height:100%;margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;}} body{{ background:var(--bg); color:var(--muted); display:flex; align-items:center; justify-content:center; padding:2.8rem; }} .card{{ text-align:center; }} .logo{{ display:flex; align-items:center; justify-content:center; gap:0.8rem; margin-bottom:1.1rem; }} .logo, .logo a, .logo a:hover {{ color:var(--green); font-weight:700; font-size:2rem; letter-spacing:0.4rem; }} .logo a {{ text-decoration: none; }} .logo a:hover {{ text-decoration: underline; }} .subtitle{{ font-size:1.1rem; margin:0.3rem 0 2rem 0; color:var(--muted); }} .panel{{ background:linear-gradient(180deg,#0b0b0b 0%, #111 100%); border-radius:0.8rem; padding:2rem; box-shadow:0 0.3rem 2rem rgba(0,0,0,0.7), inset 0 0.05rem 0 rgba(255,255,255,0.02); border:0.1rem solid rgba(69,210,58,0.06); }} .ip{{ background:transparent; border-radius:0.6rem; padding:1rem 1.1rem; font-family: ui-monospace,SFMono-Regular,Menlo,monospace; font-size:1.1rem; color:#fff139; margin:0.6rem auto 1.1rem auto; word-break:break-all; border:0.05rem solid rgba(69,210,58,0.12); }} .muted{{ color:var(--muted); font-size:1rem; margin-bottom:0.9rem; }} .controls{{display:flex;gap:0.8rem;justify-content:center;flex-wrap:wrap;}} button{{ background:transparent; color:var(--green); padding:0.8rem 1.1rem; border-radius:0.6rem; font-weight:700; border:0.1rem solid rgba(69,210,58,0.9); cursor:pointer; }} button.primary{{ background:var(--green); color:#032; box-shadow:0 0.4rem 1.2rem rgba(69,210,58,0.08); }} .note{{font-size:0.95rem;color:#9aa; margin-top:1rem;}} .small{{font-size:0.9rem;color:#808080;margin-top:0.7rem}} </style> </head> <body> <div class="card"> <div class="logo"> <div>🦙</div> <div><a href="https://ramaproxy.org">ラマ</a></div> </div> <div class="panel" role="region" aria-label="ip panel"> <div class="muted">Your public ip</div><div id="ip" class="ip"> <code>{ip}</code> </div> <div class="controls"> <button id="copyBtn" class="primary" title="Copy ip to clipboard">📋 Copy IP</button></div> </div> <script> (async function(){{ const ipEl = document.getElementById('ip'); const copyBtn = document.getElementById('copyBtn'); copyBtn.addEventListener('click', async ()=>{{ const txt = ipEl.textContent.trim(); try{{ await navigator.clipboard.writeText(txt); copyBtn.textContent = 'Copied'; setTimeout(()=> copyBtn.textContent = 'Copy IP', 1400); }}catch(e){{ const ta = document.createElement('textarea'); ta.value = txt; document.body.appendChild(ta); ta.select(); try{{ document.execCommand('copy'); copyBtn.textContent = 'Copied'; }} catch(e){{ alert('Copy failed. Select and copy manually.'); }} ta.remove(); setTimeout(()=> copyBtn.textContent = 'Copy IP', 1400); }} }}); }})(); </script> </body> </html>"##,
450    ))
451}
rama/cli/service/ip.rs

rama/cli/service/
ip.rs
