x-lines: eline (ban exempt), shun (drop commands), qline (reserved nicks)

src/coremods/core_oper.rs

@@ -31,6 +31,9 @@ pub fn commands() -> Vec<Box<dyn Command>> {
         Box::new(Kline),
         Box::new(Gline),
         Box::new(Zline),
+        Box::new(Eline),
+        Box::new(Shun),
+        Box::new(Qline),
         Box::new(ChgHost),
         Box::new(ChgIdent),
         Box::new(SetHost),
@@ -626,6 +629,48 @@ impl Command for Zline {
     }
 }
 
+/// ELINE — exempt a `user@host` / ip glob from all K/G/Z-lines.
+struct Eline;
+impl Command for Eline {
+    fn name(&self) -> &'static str {
+        "ELINE"
+    }
+    fn min_params(&self) -> usize {
+        1
+    }
+    fn handle(&self, s: &mut Server, uid: Uid, params: &[String]) -> CmdResult {
+        do_xline(s, uid, params, XKind::Eline)
+    }
+}
+
+/// SHUN — let a `user@host` connect but silently drop their commands.
+struct Shun;
+impl Command for Shun {
+    fn name(&self) -> &'static str {
+        "SHUN"
+    }
+    fn min_params(&self) -> usize {
+        1
+    }
+    fn handle(&self, s: &mut Server, uid: Uid, params: &[String]) -> CmdResult {
+        do_xline(s, uid, params, XKind::Shun)
+    }
+}
+
+/// QLINE — reserve/forbid a nick glob (opers bypass it).
+struct Qline;
+impl Command for Qline {
+    fn name(&self) -> &'static str {
+        "QLINE"
+    }
+    fn min_params(&self) -> usize {
+        1
+    }
+    fn handle(&self, s: &mut Server, uid: Uid, params: &[String]) -> CmdResult {
+        do_xline(s, uid, params, XKind::Qline)
+    }
+}
+
 /// Resolve a nick to a uid, sending ERR_NOSUCHNICK if it's unknown.
 fn oper_target(s: &mut Server, uid: Uid, nick: &str) -> Option<Uid> {
     match s.find_nick(nick) {

src/coremods/core_user.rs

@@ -350,6 +350,17 @@ impl Command for Nick {
             );
             return CmdResult::Fail;
         }
+        // Q-line: a reserved nick is refused (opers and services bypass)
+        if !s.is_oper(uid) {
+            if let Some(reason) = s.matched_qline(newnick) {
+                s.numeric(
+                    uid,
+                    ERR_ERRONEUSNICKNAME,
+                    &format!("{newnick} :Nickname is reserved: {reason}"),
+                );
+                return CmdResult::Fail;
+            }
+        }
         if let Some(other) = s.find_nick(newnick) {
             if other != uid {
                 s.numeric(