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gossipd: fix premature towire_reply_short_channel_ids_end if no node_announcement.

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Our "are we finished?" logic was wrong: it tested if there are no more
node_announcements, but it's possible that there were no node_announcements
for either end of the channel whose information we sent.

This is actually quite unusual on the real network: looking at mainnet
statis from last May, 4301 of 4337 nodes have node_announcements.

However, with query flags it's much more likely, since they might not
ask for node announcements at all.

(Found by gossip protocol tests)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2019-08-26 19:41:57 +09:30
parent af645b38c8
commit 0ec8304901
1 changed files with 3 additions and 1 deletions
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4
gossipd/gossipd.c
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@ -1576,7 +1576,9 @@ static void maybe_create_next_scid_reply(struct peer *peer)
peer->scid_query_nodes_idx = i;
/* All finished? */
if (peer->scid_queries && peer->scid_query_nodes_idx == num) {
if (peer->scid_queries
&& peer->scid_query_idx == tal_count(peer->scid_queries)
&& peer->scid_query_nodes_idx == num) {
/* BOLT #7:
*
* - MUST follow these responses with