Garage v1.0 #683
1 changed files with 28 additions and 17 deletions
|
@ -164,29 +164,40 @@ struct KnownHosts {
|
||||||
impl KnownHosts {
|
impl KnownHosts {
|
||||||
fn new() -> Self {
|
fn new() -> Self {
|
||||||
let list = HashMap::new();
|
let list = HashMap::new();
|
||||||
let hash = Self::calculate_hash(vec![]);
|
let mut ret = Self {
|
||||||
Self { list, hash }
|
list,
|
||||||
|
hash: hash::Digest::from_slice(&[0u8; 64][..]).unwrap(),
|
||||||
|
};
|
||||||
|
ret.update_hash();
|
||||||
|
ret
|
||||||
}
|
}
|
||||||
fn update_hash(&mut self) {
|
fn update_hash(&mut self) {
|
||||||
self.hash = Self::calculate_hash(self.connected_peers_vec());
|
// 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
|
||||||
fn connected_peers_vec(&self) -> Vec<(NodeID, SocketAddr)> {
|
// to the same set of nodes. If the hashes differ, they are connected to
|
||||||
let mut list = Vec::with_capacity(self.list.len());
|
// different nodes and they trigger an exchange of the full list of active
|
||||||
for (id, peer) in self.list.iter() {
|
// connections. The hash value only represents the set of node IDs and not
|
||||||
if peer.state.is_up() {
|
// their actual socket addresses, because nodes can be connected via different
|
||||||
list.push((*id, peer.addr));
|
// addresses and that shouldn't necessarily trigger a full peer exchange.
|
||||||
}
|
let mut list = self
|
||||||
}
|
.list
|
||||||
list
|
.iter()
|
||||||
}
|
.filter(|(_, peer)| peer.state.is_up())
|
||||||
fn calculate_hash(mut list: Vec<(NodeID, SocketAddr)>) -> hash::Digest {
|
.map(|(id, _)| *id)
|
||||||
|
.collect::<Vec<_>>();
|
||||||
list.sort();
|
list.sort();
|
||||||
let mut hash_state = hash::State::new();
|
let mut hash_state = hash::State::new();
|
||||||
for (id, addr) in list {
|
for id in list {
|
||||||
hash_state.update(&id[..]);
|
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<_>>()
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue