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RPKI: retry timer doesn't reset connections when more data is pending

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With very busy deployments, RPKI may kill cache connection too early.
Instead of that, we want it to keep loading if any data is waiting to
be read and the reason for delay is just our congestion.

Also, when we kill the session because of actually slow cache, we want
to reload from scratch as the data we have is unreliable and nobody
knows whether the state is still valid.
This commit is contained in:
Maria Matejka 2023-12-08 20:53:20 +01:00
parent 8cf1be6f67
commit 44e351d152
1 changed files with 7 additions and 7 deletions
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14
proto/rpki/rpki.c
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@ -295,6 +295,7 @@ rpki_cache_change_state(struct rpki_cache *cache, const enum rpki_cache_state ne
rpki_close_connection(cache);
rpki_schedule_next_retry(cache);
rpki_stop_refresh_timer_event(cache);
cache->request_session_id = 1;
break;
case RPKI_CS_FAST_RECONNECT:
@ -365,12 +366,11 @@ rpki_stop_expire_timer_event(struct rpki_cache *cache)
}
static int
rpki_do_we_recv_prefix_pdu_in_last_seconds(struct rpki_cache *cache)
rpki_sync_is_stuck(struct rpki_cache *cache)
{
if (!cache->last_rx_prefix)
return 0;
return ((current_time() - cache->last_rx_prefix) <= 2 S);
return !sk_rx_ready(cache->tr_sock->sk) && (
!cache->last_rx_prefix || (current_time() - cache->last_rx_prefix > 10 S)
);
}
/**
@ -402,7 +402,7 @@ rpki_refresh_hook(timer *tm)
/* We sent Serial/Reset Query in last refresh hook call
* and we got Cache Response but didn't get End-Of-Data yet.
* It could be a trouble with network or only too long synchronization. */
if (!rpki_do_we_recv_prefix_pdu_in_last_seconds(cache))
if (rpki_sync_is_stuck(cache))
{
CACHE_TRACE(D_EVENTS, cache, "Sync takes more time than refresh interval %us, resetting connection", cache->refresh_interval);
rpki_cache_change_state(cache, RPKI_CS_ERROR_TRANSPORT);
@ -443,7 +443,7 @@ rpki_retry_hook(timer *tm)
case RPKI_CS_CONNECTING:
case RPKI_CS_SYNC_START:
case RPKI_CS_SYNC_RUNNING:
if (!rpki_do_we_recv_prefix_pdu_in_last_seconds(cache))
if (rpki_sync_is_stuck(cache))
{
/* We tried to establish a connection in last retry hook call and haven't done
* yet. It looks like troubles with network. We are aggressive here. */