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akick: accept a matching extban only the ircd knows (ircd-enforced +b), reject acting extbans with a clear reason

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This commit is contained in:
Jean Chevronnet 2026-07-17 22:01:32 +00:00
parent c990eb1e1e
commit 77d09c4bdc
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5 changed files with 75 additions and 21 deletions
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56
modules/chanserv/src/akick.rs
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@ -28,22 +28,38 @@ pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db:
ctx.notice(me, from.uid, "Syntax: AKICK <#channel> ADD <mask> [reason]");
return;
};
// Reject something that's neither a host mask nor a known extban, and
// any extban the network's `[extban] enabled` config has turned off.
// Validate the mask: a host mask always passes; an extban must be one
// this ircd offers, be a matching (not acting) kind, and be allowed by
// the `[extban] enabled` config. Extbans echo's own table doesn't know
// are resolved against the ircd's live set so a new matching extban
// still works (the ircd enforces it).
match echo_api::AkickMask::parse(mask) {
echo_api::AkickMask::Unknown(name) => {
ctx.notice(me, from.uid, format!("\x02{name}\x02 isn't a host mask or a known extban."));
return;
echo_api::AkickMask::Host(_) => {}
echo_api::AkickMask::Ext(eb, _) => {
if !db.extban_offered(eb.name) {
ctx.notice(me, from.uid, format!("This network's ircd doesn't offer the \x02{}\x02 extban.", eb.name));
return;
}
if !db.extban_enabled(eb.name) {
ctx.notice(me, from.uid, format!("The \x02{}\x02 extban isn't enabled on this network.", eb.name));
return;
}
}
echo_api::AkickMask::Ext(eb, _) if !db.extban_offered(eb.name) => {
ctx.notice(me, from.uid, format!("This network's ircd doesn't offer the \x02{}\x02 extban.", eb.name));
return;
}
echo_api::AkickMask::Ext(eb, _) if !db.extban_enabled(eb.name) => {
ctx.notice(me, from.uid, format!("The \x02{}\x02 extban isn't enabled on this network.", eb.name));
return;
}
_ => {}
echo_api::AkickMask::Unknown(token) => match db.extban_lookup(token) {
None => {
ctx.notice(me, from.uid, format!("\x02{token}\x02 isn't a host mask or an extban this network offers."));
return;
}
Some(cap) if cap.acting => {
ctx.notice(me, from.uid, format!("\x02{}\x02 is an acting extban; auto-kick needs a matching extban or a host mask.", cap.name));
return;
}
Some(cap) if !db.extban_enabled(&cap.name) => {
ctx.notice(me, from.uid, format!("The \x02{}\x02 extban isn't enabled on this network.", cap.name));
return;
}
Some(_) => {}
},
}
if !super::require_op(me, from, chan, ctx, db) {
return;
@ -51,10 +67,10 @@ pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db:
let reason = if args.len() > 4 { args[4..].join(" ") } else { "Auto-kicked".to_string() };
match db.akick_add(chan, mask, &reason) {
Ok(()) => {
// Extbans echo can't evaluate itself (country, asn, …) are pushed
// to the channel as a ban so the ircd enforces them; the ones echo
// matches are applied on join / ENFORCE and need no standing mode.
if matches!(echo_api::AkickMask::parse(mask), echo_api::AkickMask::Ext(eb, _) if !eb.matchable()) {
// Extbans echo can't evaluate itself are pushed to the channel as
// a ban so the ircd enforces them; the ones echo matches are applied
// on join / ENFORCE and need no standing mode.
if echo_api::ircd_enforced(mask) {
ctx.channel_mode(me, chan, &format!("+b {mask}"));
}
ctx.notice(me, from.uid, format!("Added \x02{mask}\x02 to \x02{chan}\x02's auto-kick list."));
@ -73,7 +89,7 @@ pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db:
match db.akick_del(chan, mask) {
Ok(true) => {
// Lift the standing ban we set for an ircd-enforced extban.
if matches!(echo_api::AkickMask::parse(mask), echo_api::AkickMask::Ext(eb, _) if !eb.matchable()) {
if echo_api::ircd_enforced(mask) {
ctx.channel_mode(me, chan, &format!("-b {mask}"));
}
ctx.notice(me, from.uid, format!("Removed \x02{mask}\x02 from \x02{chan}\x02's auto-kick list."));
@ -90,7 +106,7 @@ pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db:
let masks: Vec<String> = db.channel(chan).map_or_else(Vec::new, |info| info.akick.iter().map(|k| k.mask.clone()).collect());
for mask in &masks {
let _ = db.akick_del(chan, mask);
if matches!(echo_api::AkickMask::parse(mask), echo_api::AkickMask::Ext(eb, _) if !eb.matchable()) {
if echo_api::ircd_enforced(mask) {
ctx.channel_mode(me, chan, &format!("-b {mask}"));
}
}