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[net-fixes] peering: only count node IDs and not addresses in hash

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Alex Auvolat 2024-03-21 09:47:04 +01:00
parent ce69dc302c
commit 5225a81dee
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GPG key ID: 0E496D15096376BE
1 changed files with 28 additions and 17 deletions
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45
src/net/peering.rs
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@ -164,29 +164,40 @@ struct KnownHosts {
impl KnownHosts {
fn new() -> Self {
let list = HashMap::new();
let hash = Self::calculate_hash(vec![]);
Self { list, hash }
let mut ret = Self {
list,
hash: hash::Digest::from_slice(&[0u8; 64][..]).unwrap(),
};
ret.update_hash();
ret
}
fn update_hash(&mut self) {
self.hash = Self::calculate_hash(self.connected_peers_vec());
}
fn connected_peers_vec(&self) -> Vec<(NodeID, SocketAddr)> {
let mut list = Vec::with_capacity(self.list.len());
for (id, peer) in self.list.iter() {
if peer.state.is_up() {
list.push((*id, peer.addr));
}
}
list
}
fn calculate_hash(mut list: Vec<(NodeID, SocketAddr)>) -> hash::Digest {
// The hash is a value that is exchanged between nodes when they ping one
// another. Nodes compare their known hosts hash to know if they are connected
// to the same set of nodes. If the hashes differ, they are connected to
// different nodes and they trigger an exchange of the full list of active
// connections. The hash value only represents the set of node IDs and not
// their actual socket addresses, because nodes can be connected via different
// addresses and that shouldn't necessarily trigger a full peer exchange.
let mut list = self
.list
.iter()
.filter(|(_, peer)| peer.state.is_up())
.map(|(id, _)| *id)
.collect::<Vec<_>>();
list.sort();
let mut hash_state = hash::State::new();
for (id, addr) in list {
for id in list {
hash_state.update(&id[..]);
hash_state.update(&format!("{}\n", addr).into_bytes()[..]);
}
hash_state.finalize()
self.hash = hash_state.finalize();
}
fn connected_peers_vec(&self) -> Vec<(NodeID, SocketAddr)> {
self.list
.iter()
.filter(|(_, peer)| peer.state.is_up())
.map(|(id, peer)| (*id, peer.addr))
.collect::<Vec<_>>()
}
}