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Apply offset to all times received from a peer 

If any of the times gossiped by a peer are in the future, apply the
necessary offset to all the times gossiped by that peer. This ensures
that all gossiped peers from a malicious peer are moved further back in
the queue.

Co-authored-by: teor <teor@riseup.net>
This commit is contained in:
Janito Vaqueiro Ferreira Filho 2021-05-24 17:20:06 -03:00
parent fa35c9b4f1
commit 9eac43a8bb
1 changed files with 6 additions and 7 deletions
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13
zebra-network/src/peer_set/candidate_set.rs
View File

@ -366,18 +366,17 @@ fn validate_addrs(
/// ///
/// If the `addrs` list is empty. /// If the `addrs` list is empty.
fn limit_last_seen_times(addrs: &mut Vec<MetaAddr>, last_seen_limit: DateTime32) { fn limit_last_seen_times(addrs: &mut Vec<MetaAddr>, last_seen_limit: DateTime32) {
let most_recent_reported_seen_time = addrs let most_recent_reported_seen_timestamp = addrs
.iter() .iter()
.map(|addr| addr.get_last_seen()) .map(|addr| addr.get_last_seen().timestamp())
.max() .max()
.expect("unexpected empty address list"); .expect("unexpected empty address list");
let offset = most_recent_reported_seen_time.timestamp() - last_seen_limit.timestamp(); if most_recent_reported_seen_timestamp > last_seen_limit.timestamp() {
let offset = most_recent_reported_seen_timestamp - last_seen_limit.timestamp();
for addr in addrs { for addr in addrs {
let old_last_seen = addr.get_last_seen().timestamp(); let old_last_seen = addr.get_last_seen().timestamp();
if old_last_seen > last_seen_limit.timestamp() {
let new_last_seen = old_last_seen - offset; let new_last_seen = old_last_seen - offset;
addr.set_last_seen(new_last_seen.into()); addr.set_last_seen(new_last_seen.into());