Dynamic DNS Fallbacks based on NetworkDetails - #6279
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Team Run ID: 📒 Files selected for processing (1)
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Included review availability: Your plan provides up to 4 included reviews per hour; 3 remain after this review. 📝 WalkthroughWalkthroughThe PR migrates network details to the v2 schema, adds nested API URL and DNS fallback data, updates consumers and protocol conversions, migrates legacy caches, and synchronizes Hickory DNS and network caches during network changes. ChangesVersioned network details
Estimated code review effort: 4 (Complex) | ~45 minutes Merge Risk: ⚪ Minimal · up to The client now obtains network details from the v2 endpoint and applies DNS fallback addresses during startup and network changes. No identified current change risk blocks merging. Sequence Diagram(s)sequenceDiagram
participant VpnService
participant Network
participant HickoryDnsResolver
participant GatewayTopologyCaches
VpnService->>Network: compare network environments
Network-->>VpnService: changed or unchanged result
VpnService->>HickoryDnsResolver: update fallback addresses when changed
VpnService->>GatewayTopologyCaches: refresh caches when changed
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 3
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Inline comments:
In `@nym-vpn-core/crates/nym-vpn-lib/src/service/vpn_service.rs`:
- Line 1049: Update maybe_update_active_network_details and
handle_network_change so the same network state is published through
send_replace in only one location, preventing duplicate receiver notifications;
preserve the existing network update behavior and add a regression test that
fails when both paths send the update.
In
`@nym-vpn-core/crates/nym-vpn-network-config/src/persistent_network_details.rs`:
- Line 132: Update the migration flow around migrated.write().await in the
persistent network details loader so cache rewrite failures are not silently
converted to None; propagate the persistence error or retain and return the
successfully migrated record in memory after logging the failure, while
preserving normal handling for successful rewrites.
In `@nym-vpn-core/crates/nym-vpn-proto/src/conversions/network_config.rs`:
- Around line 102-106: Add a DNS fallback field to proto::NymNetworkDetails,
then update both NymNetworkDetails conversion directions in network_config.rs to
map it to and from NymNetworkingSpecifics.dns_fallbacks instead of initializing
an empty vector, preserving fallback data across the protocol boundary.
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ℹ️ Review info
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Configuration used: defaults
Review profile: CHILL
Plan: Team
Run ID: 1c036de5-f041-4868-b1b9-f25c1b4fd044
⛔ Files ignored due to path filters (1)
nym-vpn-core/Cargo.lockis excluded by!**/*.lock
📒 Files selected for processing (17)
nym-vpn-core/crates/nym-diagnostic/src/diagnostic/registration/mixnet_client.rsnym-vpn-core/crates/nym-gateway-directory/src/gateway_client.rsnym-vpn-core/crates/nym-vpn-account-controller/src/nyxd_client.rsnym-vpn-core/crates/nym-vpn-api-client/src/client.rsnym-vpn-core/crates/nym-vpn-lib-types/src/lib.rsnym-vpn-core/crates/nym-vpn-lib-types/src/network.rsnym-vpn-core/crates/nym-vpn-lib/Cargo.tomlnym-vpn-core/crates/nym-vpn-lib/src/service/socks5/lazy_socks5.rsnym-vpn-core/crates/nym-vpn-lib/src/service/socks5/mod.rsnym-vpn-core/crates/nym-vpn-lib/src/service/vpn_service.rsnym-vpn-core/crates/nym-vpn-lib/src/tunnel_state_machine/tunnel_monitor.rsnym-vpn-core/crates/nym-vpn-network-config/src/fetcher.rsnym-vpn-core/crates/nym-vpn-network-config/src/lib.rsnym-vpn-core/crates/nym-vpn-network-config/src/persistent_network_details.rsnym-vpn-core/crates/nym-vpn-proto/src/conversions/network_config.rsnym-vpn-core/crates/nym-vpnc/src/main.rsnym-vpn-core/crates/test/test-manager/src/device_cleanup.rs
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…serves dns_fallbacks
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Description
Adapt to use the V2 version of the Network details from the Nym API. This adds end-to-end plumbing for DNS fallback addresses served by the Nym API network-details endpoint
v2/network/detailsendpoint that has the updated format for the networking information including DNS fallback information.DnsFallbacksupport from the nym reposnym-network-defaultscrate.This PR is a sibling to #6126 as this is intended to pull in any IP information shared over the Nym API and apply it to the DNS fallbacks used by the resolver. The two PRs will need to be integrated in the sense that they both use the same mechanism for tracking IPs received after a network details change. The details are TBD, but in general we need a policy for joining the fallbacks from discovery and network-details -- the simplest version is just to join them, though discovery is more configurable and therefor may be more reliable / specific.
Checklist:
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Summary by CodeRabbit
New Features
Bug Fixes