ircv3: close server-support-table gaps — BOT=B ISUPPORT, account-extban (a: matcher + ACCOUNTEXTBAN=a), draft/read-marker cap (gates MARKREAD sync), and no-implicit-names (suppress the post-JOIN NAMES burst)

src/channels.rs

@@ -964,7 +964,11 @@ impl Server {
             let text = t.text.clone();
             self.numeric(uid, RPL_TOPIC, &format!("{name} :{text}"));
         }
-        self.send_names(uid, &key);
+        // no-implicit-names: a client that negotiated the cap doesn't want the
+        // automatic NAMES burst after JOIN (it asks with NAMES when it needs it).
+        if !self.users.get(&uid).map(|u| u.caps.no_implicit_names).unwrap_or(false) {
+            self.send_names(uid, &key);
+        }
         self.replay_chanhistory(uid, &key); // +H: replay recent messages to the joiner
         self.propagate_join(uid, name, is_new); // tell linked servers this user joined
         self.events.push_back(Hook::Join(uid, key));
@@ -1229,6 +1233,7 @@ impl Server {
         list.iter().any(|b| {
             if b.mask.as_bytes().get(1) == Some(&b':') {
                 match b.mask.as_bytes().first() {
+                    Some(b'a') => crate::modules::accountban::matches(self, uid, &b.mask[2..]),
                     Some(b'g') => crate::modules::securitygroups::in_group(self, uid, &b.mask[2..]),
                     Some(b'y') => {
                         crate::modules::reputation::score_ban_match(self, uid, &b.mask[2..])

src/modules/accountban.rs

@@ -0,0 +1,16 @@
+//! The `a:` matching extban (IRCv3 account-extban): match a user by the services
+//! account they are logged into. `+b a:spammer` bans the account `spammer` (glob),
+//! `+e a:trusted` exempts one. A user with no account never matches. Dispatched
+//! from the channel ban matcher; advertised via `ACCOUNTEXTBAN=a`.
+
+use crate::channels::glob_match;
+use crate::server::Server;
+use crate::Uid;
+
+/// Does `uid`'s logged-in account match the glob `mask` (the part after `a:`)?
+pub fn matches(s: &Server, uid: Uid, mask: &str) -> bool {
+    match s.users.get(&uid).and_then(|u| u.account.as_deref()) {
+        Some(acct) => glob_match(mask, acct),
+        None => false, // not logged in — an account ban can't match
+    }
+}

src/modules/markread.rs

@@ -140,11 +140,14 @@ impl Command for MarkReadCmd {
                     .or_default()
                     .insert(tkey, ts);
                 let line = format!(":{} MARKREAD {target} timestamp={}", s.name, iso_time(ts));
+                // Sync the new marker to every connection under this identity that
+                // negotiated draft/read-marker (multi-device); others never asked
+                // for read-marker traffic.
                 let recips: Vec<Uid> = s
                     .users
-                    .keys()
+                    .iter()
-                    .copied()
+                    .filter(|(&p, u)| u.caps.read_marker && marker_id(s, p) == id)
-                    .filter(|&p| marker_id(s, p) == id)
+                    .map(|(&p, _)| p)
                     .collect();
                 for p in recips {
                     s.send(p, line.clone());

src/modules/mod.rs

@@ -4,6 +4,7 @@
 //! self-contained unit.
 
 pub mod account_registration;
+pub mod accountban;
 pub mod antimixedutf8;
 pub mod antirandom;
 pub mod autodrop;

src/server.rs

@@ -751,7 +751,7 @@ impl Server {
         let include_oper = self.conf_bool("operprefix", false) || self.conf_bool("ojoin", false);
         let prefix = crate::modules::customprefix::isupport(include_oper);
         let mut tokens: Vec<String> = format!(
-            "CHANTYPES=# PREFIX={prefix} CHANMODES=beIgXw,k,lfjFLHBJdK,ACDGMNOPQRSTUcimnprstuz EXTBAN=,Gbcgjmnrsy WATCH={maxwatch} MONITOR={maxmon} SILENCE={maxsil} CALLERID=g WHOX CHATHISTORY={chathist} MSGREFTYPES=timestamp,msgid UTF8ONLY CASEMAPPING=ascii NICKLEN={maxnick} CHANNELLEN={maxchan} NETWORK={}",
+            "CHANTYPES=# PREFIX={prefix} CHANMODES=beIgXw,k,lfjFLHBJdK,ACDGMNOPQRSTUcimnprstuz EXTBAN=,aGbcgjmnrsy ACCOUNTEXTBAN=a BOT=B WATCH={maxwatch} MONITOR={maxmon} SILENCE={maxsil} CALLERID=g WHOX CHATHISTORY={chathist} MSGREFTYPES=timestamp,msgid UTF8ONLY CASEMAPPING=ascii NICKLEN={maxnick} CHANNELLEN={maxchan} NETWORK={}",
             self.network
         )
         .split(' ')
@@ -1395,6 +1395,43 @@ mod tests {
         assert!(!ann.iter().any(|l| l.contains("PART")), "no fallback on case-only: {ann:?}");
     }
 
+    #[test]
+    fn isupport_advertises_bot_and_account_extban() {
+        let s = srv();
+        let joined = s.isupport_lines().join(" ");
+        assert!(joined.contains("BOT=B"), "bot-mode letter: {joined}");
+        assert!(joined.contains("ACCOUNTEXTBAN=a"), "account-extban token: {joined}");
+        assert!(joined.contains("EXTBAN=,aG"), "'a' listed in EXTBAN: {joined}");
+    }
+
+    #[test]
+    fn account_extban_matches_by_account_glob() {
+        let mut s = srv();
+        add_user(&mut s, 1, "ann");
+        s.users.get_mut(&1).unwrap().account = Some("spammer".into());
+        add_user(&mut s, 2, "bob"); // no account
+        assert!(crate::modules::accountban::matches(&s, 1, "spam*"));
+        assert!(!crate::modules::accountban::matches(&s, 1, "other"));
+        assert!(!crate::modules::accountban::matches(&s, 2, "*"), "no account never matches");
+    }
+
+    #[test]
+    fn no_implicit_names_suppresses_the_join_names_burst() {
+        let mut s = srv();
+        let arx = add_user(&mut s, 1, "ann");
+        s.users.get_mut(&1).unwrap().caps.no_implicit_names = true;
+        s.join(1, "#c", None);
+        let al: Vec<String> = arx.try_iter().collect();
+        assert!(al.iter().any(|l| l.contains("JOIN #c")), "still gets its JOIN");
+        assert!(!al.iter().any(|l| l.contains(" 353 ")), "no NAMREPLY: {al:?}");
+        assert!(!al.iter().any(|l| l.contains(" 366 ")), "no ENDOFNAMES");
+        // a client without the cap still gets the implicit NAMES
+        let brx = add_user(&mut s, 2, "bob");
+        s.join(2, "#c", None);
+        let bl: Vec<String> = brx.try_iter().collect();
+        assert!(bl.iter().any(|l| l.contains(" 353 ")) && bl.iter().any(|l| l.contains(" 366 ")));
+    }
+
     #[test]
     fn nick_change_reindexes_and_notifies_channel() {
         let mut s = srv();

src/users.rs

@@ -133,6 +133,8 @@ pub const SUPPORTED_CAPS: &[&str] = &[
     "reverse.im/filehost",
     "draft/relaymsg",
     "draft/channel-rename",
+    "draft/read-marker",
+    "no-implicit-names",
     "cap-notify",
 ];
 
@@ -168,6 +170,8 @@ pub struct Caps {
     pub filehost: bool,         // reverse.im/filehost — knows the file-host extension
     pub relaymsg: bool,         // draft/relaymsg — may use RELAYMSG (bridge relaying)
     pub channel_rename: bool,   // draft/channel-rename — receives RENAME (else PART+JOIN)
+    pub read_marker: bool,      // draft/read-marker — MARKREAD sync across the identity
+    pub no_implicit_names: bool, // no-implicit-names — suppress the auto NAMES after JOIN
     pub cap_notify: bool,
 }
 
@@ -237,6 +241,8 @@ impl Caps {
             "reverse.im/filehost" => self.filehost,
             "draft/relaymsg" => self.relaymsg,
             "draft/channel-rename" => self.channel_rename,
+            "draft/read-marker" => self.read_marker,
+            "no-implicit-names" => self.no_implicit_names,
             "cap-notify" => self.cap_notify,
             _ => false,
         }
@@ -273,6 +279,8 @@ impl Caps {
             "reverse.im/filehost" => &mut self.filehost,
             "draft/relaymsg" => &mut self.relaymsg,
             "draft/channel-rename" => &mut self.channel_rename,
+            "draft/read-marker" => &mut self.read_marker,
+            "no-implicit-names" => &mut self.no_implicit_names,
             "cap-notify" => &mut self.cap_notify,
             _ => return false,
         };