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gossipd: make use of new ratelimit bit in gossip_store length mask

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routing.c now flags rate-limited gossip as it enters the gossip_store but
makes use of it in updating the routing graph. Flagged gossip is not
rebroadcast to gossip peers.

Changelog-Changed: gossipd: now accepts spam gossip, but squelches it for
peers.
This commit is contained in:
Alex Myers
2022-05-04 08:48:59 -05:00
committed by Rusty Russell
parent cbafc0fa33
commit 9dc794dba8
7 changed files with 41 additions and 23 deletions
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27
gossipd/routing.c
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@@ -437,6 +437,7 @@ static void force_node_announce_rexmit(struct routing_state *rstate,
announce,
node->bcast.timestamp,
is_local,
false,
NULL);
}
@@ -790,6 +791,7 @@ static void add_channel_announce_to_broadcast(struct routing_state *rstate,
channel_announce,
chan->bcast.timestamp,
is_local,
false,
addendum);
rstate->local_channel_announced |= is_local;
}
@@ -1255,6 +1257,7 @@ bool routing_add_channel_update(struct routing_state *rstate,
struct unupdated_channel *uc;
u8 direction;
struct amount_sat sat;
bool spam;
/* Make sure we own msg, even if we don't save it. */
if (taken(update))
@@ -1360,16 +1363,19 @@ bool routing_add_channel_update(struct routing_state *rstate,
if (!ratelimit(rstate,
&hc->tokens, hc->bcast.timestamp, timestamp)) {
status_peer_debug(peer ? &peer->id : NULL,
"Ignoring spammy update for %s/%u"
"Spammy update for %s/%u flagged"
" (last %u, now %u)",
type_to_string(tmpctx,
struct short_channel_id,
&short_channel_id),
direction,
hc->bcast.timestamp, timestamp);
/* Ignoring != failing */
return true;
spam = true;
} else {
spam = false;
}
} else {
spam = false;
}
chan->half[direction].bcast.timestamp = timestamp;
@@ -1414,7 +1420,7 @@ bool routing_add_channel_update(struct routing_state *rstate,
= gossip_store_add(rstate->gs, update,
hc->bcast.timestamp,
local_direction(rstate, chan, NULL),
NULL);
spam, NULL);
if (hc->bcast.timestamp > rstate->last_timestamp
&& hc->bcast.timestamp < time_now().ts.tv_sec)
rstate->last_timestamp = hc->bcast.timestamp;
@@ -1581,6 +1587,7 @@ bool routing_add_node_announcement(struct routing_state *rstate,
u8 alias[32];
u8 *features, *addresses;
struct tlv_node_ann_tlvs *na_tlv;
bool spam;
if (was_unknown)
*was_unknown = false;
@@ -1670,15 +1677,18 @@ bool routing_add_node_announcement(struct routing_state *rstate,
if (!ratelimit(rstate,
&node->tokens, node->bcast.timestamp, timestamp)) {
status_peer_debug(peer ? &peer->id : NULL,
"Ignoring spammy nannounce for %s"
"Spammy nannounce for %s flagged"
" (last %u, now %u)",
type_to_string(tmpctx,
struct node_id,
&node_id),
node->bcast.timestamp, timestamp);
/* Ignoring != failing */
return true;
spam = true;
} else {
spam = false;
}
} else {
spam = false;
}
/* Harmless if it was never added */
@@ -1699,6 +1709,7 @@ bool routing_add_node_announcement(struct routing_state *rstate,
node->bcast.timestamp,
node_id_eq(&node_id,
&rstate->local_id),
spam,
NULL);
peer_supplied_good_gossip(peer, 1);
}
@@ -1919,7 +1930,7 @@ bool routing_add_private_channel(struct routing_state *rstate,
u8 *msg = towire_gossip_store_private_channel(tmpctx,
capacity,
chan_ann);
index = gossip_store_add(rstate->gs, msg, 0, false, NULL);
index = gossip_store_add(rstate->gs, msg, 0, false, false, NULL);
}
chan->bcast.index = index;
return true;