Allow blacklisting CIDR ranges

Cargo.lock

@@ -352,6 +352,15 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a3a5bfb195931eeb336b2a7b4d761daec841b97f947d34394601737a7bba5e4"
 
+[[package]]
+name = "ipnetwork"
+version = "0.20.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf466541e9d546596ee94f9f69590f89473455f88372423e0008fc1a7daf100e"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.0"
@@ -431,6 +440,7 @@ version = "0.1.0"
 dependencies = [
  "env_logger",
  "futures-util",
+ "ipnetwork",
  "log",
  "serde",
  "serde_json",

Cargo.toml

@@ -10,6 +10,7 @@ forwarder = ["tokio-tungstenite", "tokio", "futures-util"]
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 toml = "0.5"
+ipnetwork = "0.20.0"
 
 # forwarder deps
 tokio-tungstenite = { version = "0.23.1", optional = true, features = ["native-tls"] }

src/filters/blacklist.rs

@@ -1,15 +1,44 @@
 use crate::{Action, InputMessage, NoteFilter, OutputMessage};
+use ipnetwork::IpNetwork;
 use serde::Deserialize;
+use std::net::IpAddr;
+use std::str::FromStr;
 
 #[derive(Deserialize, Default)]
 pub struct Blacklist {
     pub pubkeys: Option<Vec<String>>,
     pub ips: Option<Vec<String>>,
+    pub cidrs: Option<Vec<String>>,
+}
+
+impl Blacklist {
+    fn is_ip_blocked(&self, ip: &str) -> bool {
+        if let Some(cidrs) = &self.cidrs {
+            for cidr in cidrs {
+                if let Ok(network) = IpNetwork::from_str(cidr) {
+                    if let Ok(addr) = IpAddr::from_str(ip) {
+                        if network.contains(addr) {
+                            return true;
+                        }
+                    }
+                }
+            }
+        }
+
+        if let Some(ips) = &self.ips {
+            if ips.contains(&ip.to_string()) {
+                return true;
+            }
+        }
+
+        false
+    }
 }
 
 impl NoteFilter for Blacklist {
     fn filter_note(&mut self, msg: &InputMessage) -> OutputMessage {
         let reject_message = "blocked: pubkey/ip is blacklisted".to_string();
+
         if let Some(pubkeys) = &self.pubkeys {
             if pubkeys.contains(&msg.event.pubkey) {
                 return OutputMessage::new(
@@ -20,14 +49,8 @@ impl NoteFilter for Blacklist {
             }
         }
 
-        if let Some(ips) = &self.ips {
+        if self.is_ip_blocked(&msg.source_info) {
-            if ips.contains(&msg.source_info) {
+            return OutputMessage::new(msg.event.id.clone(), Action::Reject, Some(reject_message));
-                return OutputMessage::new(
-                    msg.event.id.clone(),
-                    Action::Reject,
-                    Some(reject_message),
-                );
-            }
         }
 
         OutputMessage::new(msg.event.id.clone(), Action::Accept, None)

src/main.rs

@@ -177,12 +177,14 @@ fn noteguard() {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use noteguard::filters::{Kinds, ProtectedEvents, RateLimit, Whitelist};
     use noteguard::{Action, Note};
-    use serde_json::json;
 
     // Helper function to create a mock InputMessage
-    fn create_mock_input_message(event_id: &str, message_type: &str) -> InputMessage {
+    fn create_mock_input_message(
+        event_id: &str,
+        message_type: &str,
+        source_info: &str,
+    ) -> InputMessage {
         InputMessage {
             message_type: message_type.to_string(),
             event: Note {
@@ -196,20 +198,7 @@ mod tests {
             },
             received_at: 0,
             source_type: "mock_source".to_string(),
-            source_info: "mock_source_info".to_string(),
+            source_info: source_info.to_string(),
-        }
-    }
-
-    // Helper function to create a mock OutputMessage
-    fn create_mock_output_message(
-        event_id: &str,
-        action: Action,
-        msg: Option<&str>,
-    ) -> OutputMessage {
-        OutputMessage {
-            id: event_id.to_string(),
-            action,
-            msg: msg.map(|s| s.to_string()),
         }
     }
 
@@ -263,7 +252,7 @@ mod tests {
             .load_config(&config)
             .expect("Failed to load config");
 
-        let input_message = create_mock_input_message("test_event_1", "new");
+        let input_message = create_mock_input_message("test_event_1", "new", "mock_source_info");
         let output_message = noteguard.run(input_message);
 
         assert_eq!(output_message.action, Action::Accept);
@@ -287,7 +276,7 @@ mod tests {
             .load_config(&config)
             .expect("Failed to load config");
 
-        let input_message = create_mock_input_message("test_event_3", "new");
+        let input_message = create_mock_input_message("test_event_3", "new", "mock_source_info");
         let output_message = noteguard.run(input_message);
 
         assert_eq!(output_message.action, Action::Reject);
@@ -311,7 +300,7 @@ mod tests {
             .load_config(&config)
             .expect("Failed to load config");
 
-        let input_message = create_mock_input_message("test_event_2", "new");
+        let input_message = create_mock_input_message("test_event_2", "new", "mock_source_info");
         let output_message = noteguard.run(input_message);
 
         assert_eq!(output_message.action, Action::Reject);
@@ -334,7 +323,7 @@ mod tests {
             .load_config(&config)
             .expect("Failed to load config");
 
-        let input_message = create_mock_input_message("test_event_3", "new");
+        let input_message = create_mock_input_message("test_event_3", "new", "mock_source_info");
         let output_message = noteguard.run(input_message);
 
         assert_eq!(output_message.action, Action::Reject);
@@ -361,12 +350,49 @@ mod tests {
             .load_config(&config)
             .expect("Failed to load config");
 
-        let input_message = create_mock_input_message("test_event_4", "new");
+        let input_message = create_mock_input_message("test_event_4", "new", "mock_source_info");
         let output_message = noteguard.run(input_message);
 
         assert_eq!(output_message.action, Action::Accept);
     }
 
+    #[test]
+    fn test_blacklist_cidr() {
+        let mut noteguard = Noteguard::new();
+
+        let config: Config = toml::from_str(
+            r#"
+            pipeline = ["blacklist"]
+            [filters.blacklist]
+            cidrs = ["127.0.0.1/24"]
+        "#,
+        )
+        .expect("Failed to parse config");
+
+        noteguard
+            .load_config(&config)
+            .expect("Failed to load config");
+
+        let test_cases = [
+            ("127.0.0.1", true),
+            ("127.0.0.2", true),
+            ("128.0.0.1", false),
+            ("127.1.0.1", false),
+            ("127.0.1.1", false),
+        ];
+
+        for (ip, should_reject) in test_cases.iter() {
+            let input_message = create_mock_input_message("event_id", "new", ip);
+            let output_message = noteguard.run(input_message);
+
+            if *should_reject {
+                assert_eq!(output_message.action, Action::Reject);
+            } else {
+                assert_eq!(output_message.action, Action::Accept);
+            }
+        }
+    }
+
     #[test]
     fn test_deserialize_input_message() {
         let input_json = r#"