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Apply gossip entries in strict per-origin order and cap ingested memos

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Jean Chevronnet 2026-07-19 21:29:44 +00:00
parent a774dfedb1
commit 01da702704
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3 changed files with 51 additions and 4 deletions
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30
src/engine/tests.rs
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@ -557,7 +557,7 @@
// genuine removal, releases her founderless channel.
let (tx, mut rx) = tokio::sync::mpsc::unbounded_channel();
e.set_irc_out(tx);
e.gossip_ingest(LogEntry::for_test("peer", 1, 1, db::Event::AccountDropped { account: "alice".into() })).unwrap();
e.gossip_ingest(LogEntry::for_test("peer", 0, 1, db::Event::AccountDropped { account: "alice".into() })).unwrap();
assert!(e.db.channel("#hers").is_none(), "the dropped account's channel is released");
let parted = std::iter::from_fn(|| rx.try_recv().ok())
@ -878,6 +878,34 @@
assert!(lifted, "gossiped ban lift removes the line from the ircd");
}
// A gossiped entry that arrives out of sequence (a relay racing the direct path
// in a 3+-node mesh) must NOT advance the version vector past the gap, or the
// skipped entries are lost forever; the digest re-requests them in order.
#[test]
fn gossip_drops_an_out_of_order_entry_until_the_gap_fills() {
use echo_nickserv::NickServ;
let path = std::env::temp_dir().join("echo-gossip-ooo.jsonl");
let _ = std::fs::remove_file(&path);
let mut e = Engine::new(vec![Box::new(NickServ { uid: "42SAAAAAA".into(), guest_nick: "Guest".into(), guest_seq: 0 })], Db::open(&path, "test"));
e.set_sid("42S".into());
let (tx, _rx) = tokio::sync::mpsc::unbounded_channel();
e.set_irc_out(tx);
let akill = |seq: u64, mask: &str| LogEntry::for_test("peer", seq, seq + 1, db::Event::AkillAdded {
kind: "G".into(), mask: mask.into(), setter: "op".into(), reason: "x".into(), ts: 0, expires: None,
});
e.gossip_ingest(akill(0, "*@a")).unwrap();
assert_eq!(e.gossip_digest().get("peer"), Some(&0), "first entry applies");
// Seq 2 arrives before seq 1: dropped, version stays at 0.
e.gossip_ingest(akill(2, "*@c")).unwrap();
assert_eq!(e.gossip_digest().get("peer"), Some(&0), "an out-of-order entry doesn't advance the version");
// Seq 1 fills the gap, then the re-delivered seq 2 is contiguous.
e.gossip_ingest(akill(1, "*@b")).unwrap();
assert_eq!(e.gossip_digest().get("peer"), Some(&1));
e.gossip_ingest(akill(2, "*@c")).unwrap();
assert_eq!(e.gossip_digest().get("peer"), Some(&2), "the gap filled, seq 2 now applies");
}
// Losing a registration conflict logs out the local session on that name and
// notifies them over the services-initiated outbound path.
#[test]