globops + autodrop: /GLOBOPS oper broadcast and pre-registration scanner drop

src/modules/autodrop.rs

@@ -0,0 +1,45 @@
+//! autodrop — silently drop a not-yet-registered client that sends one of the
+//! configured commands. HTTP scanners and other junk open a connection and blurt
+//! `GET` / `POST` / `CONNECT` before ever sending NICK/USER; a real IRC client
+//! never does. Config, space-separated (repeatable):
+//!
+//! ```text
+//! autodrop_commands = GET POST HEAD CONNECT PUT DELETE OPTIONS TRACE PATCH
+//! ```
+//!
+//! Reference: InspIRCd's `m_autodrop`. Original native Rust.
+
+use crate::module::{ModResult, Module};
+use crate::server::Server;
+use crate::Uid;
+
+pub struct AutoDrop;
+
+impl Module for AutoDrop {
+    fn name(&self) -> &'static str {
+        "autodrop"
+    }
+
+    fn on_pre_command(
+        &mut self,
+        s: &mut Server,
+        uid: Uid,
+        cmd: &str,
+        _params: &[String],
+    ) -> ModResult {
+        // only before registration — a registered client's commands are its own
+        if s.users.get(&uid).map(|u| u.registered).unwrap_or(true) {
+            return ModResult::Passthru;
+        }
+        let hit = s
+            .conf_all("autodrop_commands")
+            .iter()
+            .any(|line| line.split_whitespace().any(|w| w.eq_ignore_ascii_case(cmd)));
+        if hit {
+            s.send(uid, "ERROR :Closing link (dropped)".to_string());
+            s.remove_user(uid, "Autodropped");
+            return ModResult::Deny;
+        }
+        ModResult::Passthru
+    }
+}