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Verify announced IP with seen ip for pubsub msg (#130)

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* Verify announced IP with seen ip for pubsub msg

* do not verify announced ip at local mode
This commit is contained in:
Bo QIU 2024-07-17 19:01:41 +08:00 committed by GitHub
parent 920efe0b59
commit a5f95e2e7b
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1 changed files with 49 additions and 0 deletions
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49
node/router/src/libp2p_event_handler.rs
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@ -1,3 +1,4 @@
use std::net::IpAddr;
use std::{ops::Neg, sync::Arc};
use chunk_pool::ChunkPoolMessage;
@ -517,6 +518,39 @@ impl Libp2pEventHandler {
}
}
/// Verify the announced IP address and `libp2p` seen IP address to prevent DDOS attack.
fn verify_announced_address(&self, peer_id: &PeerId, addr: &Multiaddr) -> bool {
let mut announced_ip = None;
for c in addr.iter() {
match c {
Protocol::Ip4(addr) => announced_ip = Some(IpAddr::V4(addr)),
Protocol::Ip6(addr) => announced_ip = Some(IpAddr::V6(addr)),
_ => {}
}
}
let announced_ip = match announced_ip {
Some(v) => v,
None => return false,
};
let seen_ips: Vec<IpAddr> = match self.network_globals.peers.read().peer_info(peer_id) {
Some(v) => v.seen_ip_addresses().collect(),
None => {
debug!(%announced_ip, "Failed to verify announced IP address, no peer info found");
return false;
}
};
if seen_ips.iter().any(|x| *x == announced_ip) {
true
} else {
debug!(%announced_ip, ?seen_ips, "Failed to verify announced IP address, mismatch with seen ips");
false
}
}
fn on_announce_file(
&self,
propagation_source: PeerId,
@ -533,6 +567,11 @@ impl Libp2pEventHandler {
return MessageAcceptance::Reject;
}
// verify announced ip address if required
if !self.config.private_ip_enabled && !self.verify_announced_address(&msg.peer_id, &addr) {
return MessageAcceptance::Reject;
}
// propagate gossip to peers
let d = duration_since(msg.resend_timestamp);
if d < TOLERABLE_DRIFT.neg() || d > *ANNOUNCE_FILE_TIMEOUT {
@ -569,6 +608,11 @@ impl Libp2pEventHandler {
return MessageAcceptance::Reject;
}
// verify announced ip address if required
if !self.config.private_ip_enabled && !self.verify_announced_address(&msg.peer_id, &addr) {
return MessageAcceptance::Reject;
}
// propagate gossip to peers
let d = duration_since(msg.resend_timestamp);
if d < TOLERABLE_DRIFT.neg() || d > *ANNOUNCE_SHARD_CONFIG_TIMEOUT {
@ -610,6 +654,11 @@ impl Libp2pEventHandler {
return MessageAcceptance::Reject;
}
// verify announced ip address if required
if !self.config.private_ip_enabled && !self.verify_announced_address(&msg.peer_id, &addr) {
return MessageAcceptance::Reject;
}
// propagate gossip to peers
let d = duration_since(msg.resend_timestamp);
if d < TOLERABLE_DRIFT.neg() || d > *ANNOUNCE_FILE_TIMEOUT {