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gossipd: send latest update in error message, even if delayed.

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We delay internally to reduce broadcastig route flap, but errors are
a special case: we want to send the latest, otherwise we might send an
old (non-disabled) update.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2018-07-27 06:52:37 +09:30 committed by Christian Decker
parent 3c66d5fa03
commit 73b3782943
1 changed files with 30 additions and 0 deletions
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30
gossipd/gossip.c
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@ -162,6 +162,17 @@ struct peer {
/* FIXME: Reorder */
static void peer_disable_channels(struct daemon *daemon, struct node *node);
static u8 *create_channel_update(const tal_t *ctx,
struct routing_state *rstate,
const struct chan *chan,
int direction,
bool disable,
u16 cltv_expiry_delta,
u64 htlc_minimum_msat,
u32 fee_base_msat,
u32 fee_proportional_millionths);
static struct local_update *find_local_update(struct daemon *daemon,
const struct short_channel_id *scid);
static void destroy_peer(struct peer *peer)
{
@ -937,6 +948,8 @@ static void handle_get_update(struct peer *peer, const u8 *msg)
&scid));
update = NULL;
} else {
struct local_update *l;
/* We want the update that comes from our end. */
if (pubkey_eq(&chan->nodes[0]->id, &peer->daemon->id))
update = chan->half[0].channel_update;
@ -950,8 +963,25 @@ static void handle_get_update(struct peer *peer, const u8 *msg)
struct short_channel_id,
&scid));
update = NULL;
goto out;
}
/* We might have a pending update which overrides: always send
* that now, since this is used to populate errors which should
* contain the latest information. */
l = find_local_update(peer->daemon, &scid);
if (l)
update = create_channel_update(tmpctx,
rstate,
chan, l->direction,
l->disable,
l->cltv_delta,
l->htlc_minimum_msat,
l->fee_base_msat,
l->fee_proportional_millionths);
}
out:
status_trace("peer %s schanid %s: %s update",
type_to_string(tmpctx, struct pubkey, &peer->id),
type_to_string(tmpctx, struct short_channel_id, &scid),