From bba7531e3f97ee5e315c73ca52aeccdeaec7bfdf Mon Sep 17 00:00:00 2001
From: Pierre Hubert <pierre.git@communiquons.org>
Date: Sat, 29 Apr 2023 10:29:35 +0200
Subject: [PATCH 1/4] Add base code

---
 .drone.yml      |   15 +
 Cargo.lock      | 1264 +++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml      |    3 +
 src/ip_utils.rs |   76 +++
 src/lib.rs      |  164 ++++++
 src/main.rs     |    3 -
 6 files changed, 1522 insertions(+), 3 deletions(-)
 create mode 100644 .drone.yml
 create mode 100644 Cargo.lock
 create mode 100644 src/ip_utils.rs
 create mode 100644 src/lib.rs
 delete mode 100644 src/main.rs

diff --git a/.drone.yml b/.drone.yml
new file mode 100644
index 0000000..ad7c476
--- /dev/null
+++ b/.drone.yml
@@ -0,0 +1,15 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+steps:
+- name: cargo_check
+  image: rust
+  commands:
+  - rustup component add clippy
+  - cargo clippy -- -D warnings
+  - cargo test
+
+
+
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..967bb63
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,1264 @@
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+# It is not intended for manual editing.
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+
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+
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+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
+[[package]]
+name = "windows_i686_msvc"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
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+
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+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26d41b46a36d453748aedef1486d5c7a85db22e56aff34643984ea85514e94a3"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.42.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9aec5da331524158c6d1a4ac0ab1541149c0b9505fde06423b02f5ef0106b9f0"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
+[[package]]
+name = "zstd"
+version = "0.12.3+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76eea132fb024e0e13fd9c2f5d5d595d8a967aa72382ac2f9d39fcc95afd0806"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "6.0.5+zstd.1.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d56d9e60b4b1758206c238a10165fbcae3ca37b01744e394c463463f6529d23b"
+dependencies = [
+ "libc",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.8+zstd.1.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5556e6ee25d32df2586c098bbfa278803692a20d0ab9565e049480d52707ec8c"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
diff --git a/Cargo.toml b/Cargo.toml
index a342591..047f40c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+log = "0.4.17"
+actix-web = "4"
+futures-util = "0.3.28"
\ No newline at end of file
diff --git a/src/ip_utils.rs b/src/ip_utils.rs
new file mode 100644
index 0000000..5e0f21a
--- /dev/null
+++ b/src/ip_utils.rs
@@ -0,0 +1,76 @@
+use std::net::{IpAddr, Ipv6Addr};
+use std::str::FromStr;
+
+/// Parse an IP address
+pub fn parse_ip(ip: &str) -> Option<IpAddr> {
+    let mut ip = match IpAddr::from_str(ip) {
+        Ok(ip) => ip,
+        Err(e) => {
+            log::warn!("Failed to parse an IP address: {}", e);
+            return None;
+        }
+    };
+
+    // In case of IPv6 address, we skip the 8 last octets
+    if let IpAddr::V6(ipv6) = &mut ip {
+        let mut octets = ipv6.octets();
+        for o in octets.iter_mut().skip(8) {
+            *o = 0;
+        }
+        ip = IpAddr::V6(Ipv6Addr::from(octets));
+    }
+
+    Some(ip)
+}
+
+/// Check if two ips matches
+pub fn match_ip(pattern: &str, ip: &str) -> bool {
+    if pattern.eq(ip) {
+        return true;
+    }
+
+    if pattern.ends_with('*') && ip.starts_with(&pattern.replace('*', "")) {
+        return true;
+    }
+
+    false
+}
+
+#[cfg(test)]
+mod test {
+    use crate::ip_utils::parse_ip;
+    use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+
+    #[test]
+    fn parse_bad_ip() {
+        let ip = parse_ip("badbad");
+        assert_eq!(None, ip);
+    }
+
+    #[test]
+    fn parse_ip_v4_address() {
+        let ip = parse_ip("192.168.1.1").unwrap();
+        assert_eq!(ip, IpAddr::V4(Ipv4Addr::new(192, 168, 1, 1)));
+    }
+
+    #[test]
+    fn parse_ip_v6_address() {
+        let ip = parse_ip("2a00:1450:4007:813::200e").unwrap();
+        assert_eq!(
+            ip,
+            IpAddr::V6(Ipv6Addr::new(0x2a00, 0x1450, 0x4007, 0x813, 0, 0, 0, 0))
+        );
+    }
+
+    #[test]
+    fn parse_ip_v6_address_2() {
+        let ip = parse_ip("::1").unwrap();
+        assert_eq!(ip, IpAddr::V6(Ipv6Addr::new(0, 0, 0, 0, 0, 0, 0, 0)));
+    }
+
+    #[test]
+    fn parse_ip_v6_address_3() {
+        let ip = parse_ip("a::1").unwrap();
+        assert_eq!(ip, IpAddr::V6(Ipv6Addr::new(0xa, 0, 0, 0, 0, 0, 0, 0)));
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..82c62a1
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,164 @@
+//! #actix-remote-ip
+//!
+//! A tiny crate to determine the Real IP address of a client, taking account
+//! of an eventual reverse proxy
+
+use crate::ip_utils::{match_ip, parse_ip};
+use actix_web::dev::Payload;
+use actix_web::web::Data;
+use actix_web::{Error, FromRequest, HttpRequest};
+use futures_util::future::{ready, Ready};
+use std::fmt::Display;
+use std::net::IpAddr;
+
+mod ip_utils;
+
+/// Remote IP retrieval configuration
+///
+/// This configuration must be built and set as Actix web data
+#[derive(Debug, Clone, Eq, PartialEq, Default)]
+pub struct RemoteIPConfig {
+    /// The IP address of the proxy. This address can ends with a star '*'
+    pub proxy: Option<String>,
+}
+
+impl RemoteIPConfig {
+    /// Initiate a new RemoteIPConfig configuration instance, that
+    /// can be set as [actix_web::Data] structure
+    pub fn with_proxy_ip<D: Display>(proxy: D) -> Self {
+        Self {
+            proxy: Some(proxy.to_string()),
+        }
+    }
+}
+
+/// Get the remote IP address
+pub fn get_remote_ip(req: &HttpRequest) -> IpAddr {
+    let proxy = req
+        .app_data::<Data<RemoteIPConfig>>()
+        .map(|c| c.proxy.as_ref())
+        .unwrap_or_default();
+    log::trace!("Proxy IP: {:?}", proxy);
+
+    let mut ip = req.peer_addr().unwrap().ip();
+
+    // We check if the request comes from a trusted reverse proxy
+    if let Some(proxy) = proxy.as_ref() {
+        if match_ip(proxy, &ip.to_string()) {
+            if let Some(header) = req.headers().get("X-Forwarded-For") {
+                let header = header.to_str().unwrap();
+
+                let remote_ip = if let Some((upstream_ip, _)) = header.split_once(',') {
+                    upstream_ip
+                } else {
+                    header
+                };
+
+                if let Some(upstream_ip) = parse_ip(remote_ip) {
+                    ip = upstream_ip;
+                }
+            }
+        }
+    }
+
+    ip
+}
+
+#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+pub struct RemoteIP(pub IpAddr);
+
+impl From<RemoteIP> for IpAddr {
+    fn from(i: RemoteIP) -> Self {
+        i.0
+    }
+}
+
+impl FromRequest for RemoteIP {
+    type Error = Error;
+    type Future = Ready<Result<Self, Error>>;
+
+    #[inline]
+    fn from_request(req: &HttpRequest, _: &mut Payload) -> Self::Future {
+        ready(Ok(RemoteIP(get_remote_ip(req))))
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use std::net::{IpAddr, SocketAddr};
+    use std::str::FromStr;
+
+    use crate::{get_remote_ip, RemoteIPConfig};
+    use actix_web::test::TestRequest;
+    use actix_web::web::Data;
+
+    #[test]
+    fn test_get_remote_ip() {
+        let req = TestRequest::default()
+            .peer_addr(SocketAddr::from_str("192.168.1.1:1000").unwrap())
+            .to_http_request();
+        assert_eq!(
+            get_remote_ip(&req),
+            "192.168.1.1".parse::<IpAddr>().unwrap()
+        );
+    }
+
+    #[test]
+    fn test_get_remote_ip_from_proxy() {
+        let req = TestRequest::default()
+            .peer_addr(SocketAddr::from_str("192.168.1.1:1000").unwrap())
+            .insert_header(("X-Forwarded-For", "1.1.1.1"))
+            .app_data(Data::new(RemoteIPConfig::with_proxy_ip("192.168.1.1")))
+            .to_http_request();
+
+        assert_eq!(get_remote_ip(&req), "1.1.1.1".parse::<IpAddr>().unwrap());
+    }
+
+    #[test]
+    fn test_get_remote_ip_from_proxy_2() {
+        let req = TestRequest::default()
+            .peer_addr(SocketAddr::from_str("192.168.1.1:1000").unwrap())
+            .insert_header(("X-Forwarded-For", "1.1.1.1, 1.2.2.2"))
+            .app_data(Data::new(RemoteIPConfig::with_proxy_ip("192.168.1.1")))
+            .to_http_request();
+        assert_eq!(get_remote_ip(&req), "1.1.1.1".parse::<IpAddr>().unwrap());
+    }
+
+    #[test]
+    fn test_get_remote_ip_from_proxy_ipv6() {
+        let req = TestRequest::default()
+            .peer_addr(SocketAddr::from_str("192.168.1.1:1000").unwrap())
+            .insert_header(("X-Forwarded-For", "10::1, 1.2.2.2"))
+            .app_data(Data::new(RemoteIPConfig::with_proxy_ip("192.168.1.1")))
+            .to_http_request();
+
+        assert_eq!(get_remote_ip(&req), "10::".parse::<IpAddr>().unwrap());
+    }
+
+    #[test]
+    fn test_get_remote_ip_from_no_proxy() {
+        let req = TestRequest::default()
+            .peer_addr(SocketAddr::from_str("192.168.1.1:1000").unwrap())
+            .insert_header(("X-Forwarded-For", "1.1.1.1, 1.2.2.2"))
+            .to_http_request();
+
+        assert_eq!(
+            get_remote_ip(&req),
+            "192.168.1.1".parse::<IpAddr>().unwrap()
+        );
+    }
+
+    #[test]
+    fn test_get_remote_ip_from_other_proxy() {
+        let req = TestRequest::default()
+            .peer_addr(SocketAddr::from_str("192.168.1.1:1000").unwrap())
+            .insert_header(("X-Forwarded-For", "1.1.1.1, 1.2.2.2"))
+            .app_data(Data::new(RemoteIPConfig::with_proxy_ip("192.168.1.2")))
+            .to_http_request();
+
+        assert_eq!(
+            get_remote_ip(&req),
+            "192.168.1.1".parse::<IpAddr>().unwrap()
+        );
+    }
+}
diff --git a/src/main.rs b/src/main.rs
deleted file mode 100644
index e7a11a9..0000000
--- a/src/main.rs
+++ /dev/null
@@ -1,3 +0,0 @@
-fn main() {
-    println!("Hello, world!");
-}
-- 
2.45.2


From dc0c66bc3c1cfa30cc29918211998f09cc7e9e33 Mon Sep 17 00:00:00 2001
From: Pierre Hubert <pierre.git@communiquons.org>
Date: Sat, 29 Apr 2023 10:33:14 +0200
Subject: [PATCH 2/4] Ready for first release

---
 Cargo.lock | 2 +-
 Cargo.toml | 7 ++++++-
 README.md  | 2 ++
 3 files changed, 9 insertions(+), 2 deletions(-)
 create mode 100644 README.md

diff --git a/Cargo.lock b/Cargo.lock
index 967bb63..7d0f3e6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -70,7 +70,7 @@ dependencies = [
 
 [[package]]
 name = "actix-remote-ip"
-version = "0.1.0"
+version = "0.1.0-alpha"
 dependencies = [
  "actix-web",
  "futures-util",
diff --git a/Cargo.toml b/Cargo.toml
index 047f40c..2059ca2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,12 @@
 [package]
 name = "actix-remote-ip"
-version = "0.1.0"
+version = "0.1.0-alpha"
 edition = "2021"
+authors = ["Pierre HUBERT <pierre.git@communiquons.org>"]
+description = "Tiny extractor to get real client IP address, parsing X-Forwarded-For header"
+readme = "README.md"
+license = "GPL-2.0-or-later"
+repository = "https://gitea.communiquons.org/pierre/actix-remote-ip"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..3822334
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+# Actix Remote IP extractor
+Tiny extractor of remote user IP address
-- 
2.45.2


From cc6dac666e04524a2349ac491b40861163fe89e1 Mon Sep 17 00:00:00 2001
From: Pierre Hubert <pierre.git@communiquons.org>
Date: Sat, 29 Apr 2023 10:55:06 +0200
Subject: [PATCH 3/4] Ready for first release

---
 Cargo.lock |  2 +-
 Cargo.toml |  2 +-
 README.md  | 30 +++++++++++++++++++++++++++++-
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 7d0f3e6..967bb63 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -70,7 +70,7 @@ dependencies = [
 
 [[package]]
 name = "actix-remote-ip"
-version = "0.1.0-alpha"
+version = "0.1.0"
 dependencies = [
  "actix-web",
  "futures-util",
diff --git a/Cargo.toml b/Cargo.toml
index 2059ca2..e918acb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "actix-remote-ip"
-version = "0.1.0-alpha"
+version = "0.1.0"
 edition = "2021"
 authors = ["Pierre HUBERT <pierre.git@communiquons.org>"]
 description = "Tiny extractor to get real client IP address, parsing X-Forwarded-For header"
diff --git a/README.md b/README.md
index 3822334..967ec6a 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,30 @@
 # Actix Remote IP extractor
-Tiny extractor of remote user IP address
+Tiny extractor of remote user IP address, that handles reverse proxy.
+
+The `X-Forwarded-For` header is automatically parsed when the request comes from a defined proxy, to determine the real remote client IP Address.
+
+Note : regarding IPv6 addresses, the local part of the address is discarded. For example, the  IPv6 client `2001:0db8:85a3:0000:0000:8a2e:0370:7334` will be returned as `2001:0db8:85a3:0000:0000:0000:0000:0000`
+
+## Configuration
+Configure it when you configure your Actix server:
+
+```rust
+HttpServer::new(move || {
+    App::new()
+        .app_data(web::Data::new(RemoteIPConfig {
+            proxy: Some("IP".to_string())
+        }))
+    // ...
+})
+```
+
+## Usage
+In your route, add a `RemoteIP` parameter:
+
+```rust
+#[get("/")]
+async fn home(remote_ip: RemoteIP) -> HttpResponse {
+    let ip: IpAddr = remote_ip.0;
+    // ...
+}
+```
\ No newline at end of file
-- 
2.45.2


From 87a049ebad5d6cbb52d290de014c4a134376c21b Mon Sep 17 00:00:00 2001
From: Pierre Hubert <pierre.git@communiquons.org>
Date: Sat, 29 Apr 2023 10:55:58 +0200
Subject: [PATCH 4/4] Add badges

---
 README.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/README.md b/README.md
index 967ec6a..409341b 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
 # Actix Remote IP extractor
+[![Build Status](https://drone.communiquons.org/api/badges/pierre/actix-remote-ip/status.svg)](https://drone.communiquons.org/pierre/actix-remote-ip)
+[![Crate](https://img.shields.io/crates/v/actix-remote-ip.svg)](https://crates.io/crates/actix-remote-ip)
+
 Tiny extractor of remote user IP address, that handles reverse proxy.
 
 The `X-Forwarded-For` header is automatically parsed when the request comes from a defined proxy, to determine the real remote client IP Address.
-- 
2.45.2