fix(node): bound Identify-derived Kademlia addresses - #410
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Limit details: You’ve used the included review currently available. 📝 WalkthroughWalkthroughIdentify-derived peer addresses now use bounded retention with canonicalization, rate limiting, FIFO eviction, TTL expiration, and cleanup. Explicit addresses remain preserved while Kademlia reflects accepted and removed Identify addresses. ChangesIdentify address retention
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to Identify-derived address retention is bounded while configured peer addresses remain preserved. No concrete merge-blocking risk is currently identified. Sequence Diagram(s)sequenceDiagram
participant Identify
participant P2PState
participant AddressBook
participant Kademlia
Identify->>P2PState: Report peer addresses
P2PState->>AddressBook: Apply bounded update
AddressBook-->>P2PState: Accepted and removed addresses
P2PState->>Kademlia: Add accepted addresses
P2PState->>Kademlia: Remove evicted or expired addresses
🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
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Actionable comments posted: 1
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Inline comments:
In `@crates/gitlawb-node/src/p2p/mod.rs`:
- Around line 249-261: Update the per-peer address handling around the eviction
loop and refresh logic so entries refreshed during the current Identify update
are never evicted; when the report exceeds IDENTIFY_ADDRESS_LIMIT, drop surplus
new addresses instead. Preserve insertion-token and address-count bookkeeping,
and add a test covering two consecutive oversized updates that verifies the
retained address set remains stable.
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crates/gitlawb-node/src/p2p/mod.rs
Limit details: You’ve used the included review currently available.
Greptile SummaryThis PR introduces a bounded lease-based address book for addresses learned through libp2p Identify while preserving explicitly configured Kademlia addresses.
Confidence Score: 5/5The PR appears safe to merge, with no concrete blocking or independently actionable non-blocking defect identified. The new address-book transitions preserve their count and insertion-order invariants, bound untrusted Identify state, reject mismatched peer suffixes, and guard explicitly configured addresses from Identify-driven removal.
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| Filename | Overview |
|---|---|
| crates/gitlawb-node/src/p2p/mod.rs | Adds internally consistent Identify-address lease, rate-limit, expiration, canonicalization, and explicit-ownership handling with targeted unit coverage. |
Flowchart
%%{init: {'theme': 'neutral'}}%%
flowchart TD
I[Identify Received] --> U[Canonicalize and update Identify address book]
U -->|New address| A[Add to Kademlia]
U -->|Per-peer or global eviction| G{Also explicitly configured?}
T[Periodic TTL cleanup] --> E[Expire stale Identify leases]
E --> G
G -->|Yes| K[Keep Kademlia address]
G -->|No| R[Remove from Kademlia]
C[AddKnownPeer command] --> X[Record explicit ownership]
X --> A
Reviews (1): Last reviewed commit: "fix(node): bound Identify-derived Kademl..." | Re-trigger Greptile
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The core address-book logic is sound. I verified all six named guards are load-bearing by gutting each one in turn and running its test: per-peer cap, rate limit, global cap, TTL expiry, foreign-peer-suffix rejection, and refresh-preserving eviction all go RED when their guard is removed and GREEN when restored. CI is green (13 checks, 0 bad). The one inline thread about FIFO eviction discarding refreshed addresses is resolved in the code itself: the eviction only targets entries not in the current report, and if all entries were refreshed, it breaks instead of evicting.
This PR shares crates/gitlawb-node/src/p2p/mod.rs with #324, #325, and #334, so a rebase onto any of them will be mechanical.
Findings
- [P3] Log the dropped address in AddKnownPeer
crates/gitlawb-node/src/p2p/mod.rs:665
The newwith_p2pcall on theAddKnownPeerpath silently drops an address whose/p2p/suffix names a different peer. Thecontinuegives no signal. Awarn!before it would make the drop observable when this handler gains callers.
Not an ask, recorded only: update processes the full listen_addrs slice (clone, canonicalize, hash, sort) before the 8-address admission cap applies. libp2p-identify 0.47.0 caps an Identify message at 4096 bytes, so the practical input is bounded to roughly 130 addresses, but pre-truncating the slice before processing would be defense in depth.
Not an ask, recorded only: update inserts an empty IdentifyPeerAddresses entry before filtering addresses, so a peer whose report is empty or all-foreign-suffix leaves an uncounted row. These are cleaned on the 60-second expiry tick but are not bounded by the 1,024 global address cap in the meantime. Each entry is small and requires a distinct PeerId with an active connection, so the practical risk is low.
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Summary
Identify events currently copy every advertised listen address into Kademlia with no application-level lifetime or cardinality bound. This change bounds Identify-derived address state while preserving explicitly configured peer addresses.
No directly matching issue or pull request was found after searching the current tracker for Identify Push and Kademlia address limits, eviction, TTL, and growth controls.
Changes
AddKnownPeeraddresses when an overlapping Identify lease expiresTest plan
cargo test -p gitlawb-node p2p::tests::cargo fmt --all -- --checkcargo clippy -p gitlawb-node --bin gitlawb-node -- -D warningsSummary by CodeRabbit
New Features
Bug Fixes