milestone 25: client names learned over reverse dns

src/app.zig

@@ -34,6 +34,7 @@ const api_limiter = @import("web/api_limiter.zig");
 const auth = @import("web/auth.zig");
 const cert_store = @import("server/cert_store.zig");
 const cli = @import("cli.zig");
+const client_names = @import("server/client_names.zig");
 const clients = @import("server/clients.zig");
 const config_export = @import("config/export.zig");
 const db = @import("storage/db.zig");
@@ -462,6 +463,9 @@ fn serve(r: cli.Runner, args: cli.RunArgs) !u8 {
 
     var paused: pause.Pause = .{};
     var tracker: clients.Tracker = .init(cfg.logging.retention_days);
+    // Naming rides the tracker's pass, on the tracker's task and connection
+    // (milestone-25 ruling 1), and reads the live forward zones.
+    var client_names_resolver: client_names.Resolver = .init(&tables);
 
     // The queue holds waiting tasks in intrusive lists, so neither the buffer
     // nor the `Logger` may move once a task has touched either.
@@ -635,6 +639,7 @@ fn serve(r: cli.Runner, args: cli.RunArgs) !u8 {
         .handler = &h,
         .pause = &paused,
         .tracker = &tracker,
+        .client_names = &client_names_resolver,
         .manager = &manager,
         .pool = &pool,
         .monitor = &monitor,
@@ -751,7 +756,7 @@ fn serve(r: cli.Runner, args: cli.RunArgs) !u8 {
     try group.concurrent(io, retention_mod.Retention.run, .{ &retention, io, &querylog_retention_db, gate });
     try group.concurrent(io, disk_monitor.Monitor.run, .{ &monitor, io });
     try group.concurrent(io, manager_mod.Manager.runScheduler, .{ &manager, io });
-    try group.concurrent(io, clients.Tracker.run, .{ &tracker, io, &tracker_db, gate });
+    try group.concurrent(io, clients.Tracker.run, .{ &tracker, io, &tracker_db, gate, &client_names_resolver });
     try group.concurrent(io, runMaintenance, .{ &h, if (web_limiter) |*l| l else null, io });
 
     // Started last (ruling 26), canceled by the same `group.cancel`; its inner