Function spam_new_peer

connectd/multiplex.c:234–279

BOLT #7: * A node: * - MUST NOT relay any gossip messages it did not generate itself, * unless explicitly requested. */ i.e. the strong implication is that we spam our own gossip aggressively! * "Look at me!" "Look at me!!!!". */

 * "Look at me!"  "Look at me!!!!".
 */
static void spam_new_peer(struct peer *peer, struct gossmap *gossmap)
{
	struct gossmap_node *me;
	const u8 *msg;
	u64 send_threshold;

	/* Find ourselves; if no channels, nothing to send */
	me = gossmap_find_node(gossmap, &peer->daemon->id);
	if (!me)
		return;

	send_threshold = -1ULL;

	/* Just in case we have many peers and not all are connecting or
	 * some other corner case, send everything to first few. */
	if (peer_htable_count(peer->daemon->peers) > GOSSIP_SPAM_REDUNDANCY
	    && me->num_chans > GOSSIP_SPAM_REDUNDANCY) {
		send_threshold = -1ULL / me->num_chans * GOSSIP_SPAM_REDUNDANCY;
	}

	for (size_t i = 0; i < me->num_chans; i++) {
		struct gossmap_chan *chan = gossmap_nth_chan(gossmap, me, i, NULL);

		/* We set this so we'll send a fraction of all our channels */
		if (pseudorand_u64() > send_threshold)
			continue;

		/* Send channel_announce */
		msg = gossmap_chan_get_announce(NULL, gossmap, chan);
		inject_peer_msg(peer, take(msg));

		/* Send both channel_updates (if they exist): both help people
		 * use our channel, so we care! */
		for (int dir = 0; dir < 2; dir++) {
			if (!gossmap_chan_set(chan, dir))
				continue;
			msg = gossmap_chan_get_update(NULL, gossmap, chan, dir);
			inject_peer_msg(peer, take(msg));
		}
	}

	/* If we have one, we should send our own node_announcement */
	msg = gossmap_node_get_announce(NULL, gossmap, me);
	if (msg)
		inject_peer_msg(peer, take(msg));
}

void setup_peer_gossip_store(struct peer *peer,
			     const struct feature_set *our_features,