Create new databases with auto_vacuum incremental (closes #43)

SQLite only accepts auto_vacuum before the database file is first
written. The connection switched to WAL first, which writes the file,
so the PRAGMA auto_vacuum in Initialize came too late and was ignored.
The setting now goes in the connection string, which the driver applies
on open before the journal mode, and the late PRAGMA is removed.
Vacuum now reads every row PRAGMA incremental_vacuum returns: SQLite
frees one page per row, and the single step ExecContext takes freed
only one page per call. Tests check that every pooled connection sees
auto_vacuum incremental on a new database and that one Vacuum call
frees every page left by deleting routes.

Model: opus-5-5

.dockerignore

@@ -0,0 +1,32 @@
+# Docker does not read .gitignore, and a pattern here matches from the root of
+# the build context only: a pattern meant for every directory needs `**/`.
+
+# .git is sent without its config. Without a VERSION build argument the
+# stage that compiles runs `git describe --tags --always` on .git, which
+# does not need .git/config; that file can hold a credential, such as a
+# password in a remote URL or the token the CI checkout step stores there.
+.git/config
+
+# Local build and debug output: `make build`, `make run`, `make asupdate`, test
+# binaries, coverage profiles and source archives.
+/bin
+/log.txt
+/out
+/pkg/asinfo/asdata.json
+**/*.tar.zst
+**/*.test
+**/*.out
+**/*.tmp
+
+# Local databases and secrets. The image carries a source archive of the whole
+# build context, so these would otherwise ship inside it.
+**/*.db
+**/*.db-journal
+**/*.db-wal
+**/.env
+
+# A local Go workspace points at directories outside the build context.
+/go.work
+/go.work.sum
+
+**/.DS_Store

Dockerfile

@@ -40,8 +40,23 @@ RUN go mod download && go mod vendor
 # installed above. The suite is offline (the live-feed test is opt-in).
 RUN make test
 
-# Build the binary with CGO enabled (required for sqlite3)
+# Build the binary with CGO enabled (required for sqlite3). The version the
-RUN CGO_ENABLED=1 GOOS=linux go build -o /routewatch ./cmd/routewatch
+# page footer shows is the VERSION build argument when one is given, otherwise
+# `git describe --tags --always` of the .git in the build context (git comes
+# with this image): the tag on a tagged commit, tag-N-gHASH after one, the
+# short commit when no tag is reachable. A context that carries .git and still
+# yields no version fails the build. The footer links to the full commit.
+ARG VERSION
+RUN version="${VERSION:-$(git describe --tags --always || echo unknown)}"; \
+    if [ -e .git ] && { [ -z "$version" ] || [ "$version" = dev ] || \
+        [ "$version" = unknown ]; }; then \
+        echo "no version could be derived although the build context carries .git" >&2; \
+        exit 1; \
+    fi; \
+    CGO_ENABLED=1 GOOS=linux go build -o /routewatch -ldflags "\
+        -X git.eeqj.de/sneak/routewatch/internal/version.GitRevision=$(git rev-parse --verify HEAD || echo unknown) \
+        -X git.eeqj.de/sneak/routewatch/internal/version.GitRevisionShort=$version" \
+        ./cmd/routewatch
 
 # Create source archive with vendored dependencies
 RUN tar --zstd -cf /routewatch-source.tar.zst \
@@ -79,8 +94,8 @@ RUN chown -R routewatch:routewatch /app
 ENV XDG_DATA_HOME=/var/lib
 
 # Cap the Go heap at 1.5 GiB so the runtime collects harder before the
-# container's memory limit is reached. runuser preserves this the way it does
+# container's memory limit is reached. setpriv in the entrypoint preserves this
-# XDG_DATA_HOME above.
+# the way it does XDG_DATA_HOME above.
 ENV GOMEMLIMIT=1536MiB
 
 # Cap glibc's malloc arenas. The SQLite C library allocates and frees millions
@@ -96,8 +111,8 @@ EXPOSE 8080
 
 COPY ./entrypoint.sh /entrypoint.sh
 
-# Health check using the health endpoint
+# Health check using the health endpoint, on the port PORT names
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
-    CMD curl -sf http://localhost:8080/.well-known/healthcheck.json || exit 1
+    CMD curl -sf "http://localhost:${PORT:-8080}/.well-known/healthcheck.json" || exit 1
 
 ENTRYPOINT ["/bin/bash", "/entrypoint.sh" ]

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Jeffrey Paul <sneak@sneak.berlin>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

@@ -2,7 +2,7 @@ export DEBUG = routewatch
 
 # Git revision for version embedding
 GIT_REVISION := $(shell git rev-parse HEAD 2>/dev/null || echo "unknown")
-GIT_REVISION_SHORT := $(shell git rev-parse --short HEAD 2>/dev/null || echo "unknown")
+GIT_REVISION_SHORT := $(shell git describe --tags --always 2>/dev/null || echo "unknown")
 VERSION_PKG := git.eeqj.de/sneak/routewatch/internal/version
 LDFLAGS := -X $(VERSION_PKG).GitRevision=$(GIT_REVISION) -X $(VERSION_PKG).GitRevisionShort=$(GIT_REVISION_SHORT)
 

README.md

@@ -1,6 +1,9 @@
 # RouteWatch
 
-RouteWatch is a real-time BGP routing table monitor that streams BGP UPDATE messages from the RIPE RIS Live service, maintains a live routing table in SQLite, and provides HTTP APIs for querying routing information.
+RouteWatch is an MIT-licensed Go daemon by @sneak that monitors the BGP routing
+table in real time: it streams BGP UPDATE messages from the RIPE RIS Live
+service, maintains a live routing table in SQLite, and provides HTTP APIs for
+querying routing information.
 
 
 ## Features
@@ -139,7 +142,10 @@ routewatch/
 - **Backpressure**: Probabilistic message dropping when queues exceed 50% capacity
 - **Graceful Shutdown**: 60-second timeout, flushes all pending batches
 - **Reconnection**: Exponential backoff (5s-320s) with reset after 30s of stable connection
-- **IPv4 Optimization**: IP ranges stored as uint32 for O(1) lookups
+- **IP Lookup**: the most specific live route is found by looking up the
+  address's prefix at each mask length, longest first, in the prefix index
+  (at most 33 lookups for IPv4, 129 for IPv6); prefixes are stored in the
+  text form Go's `net/netip` prints
 
 ### Database Schema
 
@@ -151,7 +157,7 @@ prefixes_v6(id, prefix, mask_length, first_seen, last_seen)
 
 -- Live routing tables (one per IP version)
 live_routes_v4(id, prefix, mask_length, origin_asn, peer_ip, as_path,
-               next_hop, last_updated, v4_ip_start, v4_ip_end)
+               next_hop, last_updated)
 live_routes_v6(id, prefix, mask_length, origin_asn, peer_ip, as_path,
                next_hop, last_updated)
 
@@ -166,14 +172,21 @@ Configuration is handled via environment variables and OS-specific paths:
 
 | Variable | Default | Description |
 |----------|----------|-------------|
-| `PORT` | `8080` | HTTP server port |
+| `PORT` | `8080` | HTTP server port, a whole number from 1 to 65535 |
 | `DEBUG` | (empty) | Set to `routewatch` for debug logging |
+| `XDG_DATA_HOME` | `/var/lib` (in the Docker image) | Base of the state directory; must be an absolute path |
 | `GOMEMLIMIT` | `1536MiB` (in the Docker image) | Go soft memory limit; see Memory |
-| `MALLOC_ARENA_MAX` | `2` (in the Docker image) | glibc malloc arena cap; see Memory |
+| `MALLOC_ARENA_MAX` | `2` (in the Docker image) | glibc malloc arena cap, a positive whole number; see Memory |
+
+A variable that is set to an invalid value stops the start with an error and a
+non-zero exit. An empty variable counts as unset.
 
 State directory (database location):
 - macOS: `~/Library/Application Support/routewatch/`
-- Linux: `/var/lib/routewatch/` or `~/.local/share/routewatch/`
+- Linux: `/var/lib/berlin.sneak.app.routewatch/` when running as root,
+  otherwise `$XDG_DATA_HOME/berlin.sneak.app.routewatch/` (with `XDG_DATA_HOME`
+  unset, `~/.local/share/berlin.sneak.app.routewatch/`). In the Docker image
+  this is `/var/lib/berlin.sneak.app.routewatch/`.
 
 ## Memory
 
@@ -220,6 +233,22 @@ What happens at each limit:
 With `DEBUG=routewatch` the daemon logs a `System stats` line every 60 seconds
 with the goroutine count and Go memory figures.
 
+## Running under upaas
+
+What the [upaas](https://git.eeqj.de/sneak/upaas) app needs:
+
+- Container port: `8080`.
+- Volume: one, at container path `/var/lib/berlin.sneak.app.routewatch`.
+- Environment: nothing is required. Leave `XDG_DATA_HOME`, `GOMEMLIMIT` and
+  `MALLOC_ARENA_MAX` at the image's values. `DEBUG=routewatch` is optional and
+  adds the `System stats` memory line to the log.
+- Memory Limit: `5g`, the 5 GiB limit from Memory above. upaas sets no swap
+  limit, so on a host with swap Docker allows the same amount of swap again.
+- Health check: the image's `HEALTHCHECK` requests
+  `/.well-known/healthcheck.json` on the container port. upaas reads the
+  container's health 60 seconds after a deploy and fails the deploy unless it
+  is `healthy`.
+
 ## Development
 
 ```bash
@@ -274,4 +303,8 @@ invoke `go test` directly without `-short`:
 
 ## License
 
-See LICENSE file.
+MIT. See [`LICENSE`](LICENSE).
+
+## Author
+
+[@sneak](https://sneak.berlin)

TODO.md

@@ -10,19 +10,93 @@
 
 # Status
 
-pre-1.0. No git tags. Runs in production-style Docker deployment, but
+pre-1.0. No git tags. The Docker build runs the format check, the linter
-the policy compliance branch (repo-policies-compliance, make check
+and the tests, and the Gitea workflow runs that build on every push. The
-passing, clean tree) is unmerged to main and the CI workflow is missing.
+image sets memory ceilings for a 5 GiB container (README "Memory") and the
+README says how to run it under upaas (README "Running under upaas"). A
+35-hour run of `3898daa` on the live feed peaked at about 1 GiB, without a
+container memory limit.
 
 # Next Step
 
-Merge repo-policies-compliance into main (3 commits: policy files and
+`next` waits for sneak to merge it to `main` through
-.gitignore, Makefile targets fmt-check/check/docker/hooks, gofmt pass),
+https://git.eeqj.de/sneak/routewatch/pulls/6. After that, setting
-then add .gitea/workflows/check.yml as a small follow-up commit so CI
+routewatch up under upaas on fsn1app1 and deploying it are his
-runs make check on main.
+(https://git.eeqj.de/sneak/routewatch/issues/31), and so is the run under a
+real 5 GiB limit (https://git.eeqj.de/sneak/routewatch/issues/3).
+The other open issue is https://git.eeqj.de/sneak/routewatch/issues/30.
 
 # Completed Steps
 
+- 2026-10-03: a new database is created with `auto_vacuum` set to
+  incremental, through the connection string so it is set before the file
+  is first written, and each periodic incremental vacuum now returns up to
+  1000 free pages; the late `PRAGMA auto_vacuum` in `Initialize`, which
+  SQLite ignored, is gone (closes #43)
+- 2026-10-03: looking up an IP address no longer reads every IPv6 route:
+  both families find the most specific live route with at most 33 or 129
+  lookups on the prefix index, and the IPv4 range columns are gone. Prefixes
+  from the feed are stored in one text form, so an IPv6 withdrawal, which the
+  feed sends uncompressed, now removes its route (closes #48)
+- 2026-10-02: a plain `docker build .` stamps the commit's tag or short
+  commit (`git describe --tags --always`) into the page footer instead of
+  `unknown`: `.dockerignore` sends `.git` without `.git/config`, a `VERSION`
+  build argument takes precedence, and `make build` stamps the same value
+  (closes #46)
+- 2026-09-29: the entrypoint creates the data directory if it is missing and
+  stops the start if a step fails; README "Running under upaas" no longer
+  asks for the host directory to be created first (closes #42)
+- 2026-09-29: `.dockerignore` keeps `.git`, local build output, local
+  databases and `.env` out of the Docker build context, and so out of the
+  source archive in the image (closes #39)
+- 2026-09-29: README first line names the MIT license and the author;
+  the License section now says MIT and links `LICENSE`, and an Author
+  section was added; this file brought up to date (closes #38)
+- 2026-09-29: MIT `LICENSE` (closes #1)
+- 2026-09-28: stopping the daemon while the feed is flowing no longer
+  panics with "send on closed channel": the read loop checks for a stop
+  just before handing a message to the handler queues, and a second
+  `Stop` no longer closes the queues again (closes #34)
+- 2026-09-28: `docker stop` no longer kills the daemon 2 seconds after the
+  stop signal: the entrypoint switches to the `routewatch` user with
+  `setpriv` instead of `runuser`, so the daemon receives the signal itself
+  and gets the whole wait `docker stop` allows, up to its own 60-second
+  limit (closes #33)
+- 2026-09-28: ready to run under upaas: a set but invalid `PORT`,
+  `XDG_DATA_HOME` or `MALLOC_ARENA_MAX` stops the start, the health
+  check follows `PORT`, README "Running under upaas" section (closes
+  #31)
+- 2026-09-22: realtime in-memory database statistics: counts seeded at
+  startup and adjusted on every write, oldest/newest route timestamps via
+  index-end lookups; `/api/v1/stats` no longer scans the tables (closes
+  #27)
+- 2026-09-21: batch writes take the write lock when their transaction
+  begins (`_txlock=immediate`), so they wait out a WAL checkpoint instead
+  of failing with "database is locked" (closes #25)
+- 2026-09-21: `MALLOC_ARENA_MAX=2` in the image caps glibc malloc arenas,
+  so memory outside the Go runtime no longer grows with the core count
+  (closes #23)
+- 2026-09-21: `GOMEMLIMIT=1536MiB` in the image; README Memory section
+  with the memory budget and the 5 GiB container limit (closes #13)
+- 2026-09-21: the four handler queues hold at most 20,000 messages each,
+  down from 100,000 (closes #11)
+- 2026-09-21: two goroutine leaks fixed: the stats handlers after a
+  timeout and the streamer's tickers on every reconnect (closes #12)
+- 2026-09-21: parsed RIS messages no longer keep the unused `Community`
+  and `Raw` fields (closes #9)
+- 2026-09-21: `.editorconfig`, and a Gitea workflow that runs
+  `script/cibuild` on every push (closes #14)
+- 2026-09-21: the peering handler's AS-path map holds at most 500,000
+  paths and is swapped for an empty one every 30 seconds instead of copied
+  (closes #10)
+- 2026-09-21: SQLite memory bounded across the whole connection pool: a
+  64 MiB page cache on each connection, 1 GiB soft and 1.5 GiB hard heap
+  limits (closes #8)
+- 2026-09-21: the Docker build runs the format check, the linter and the
+  tests, linting in a separate stage on a golangci-lint image pinned by
+  digest (closes #5)
+- 2026-09-21: `make test` skips the live-network feed test (`-short`), so
+  `make check` no longer depends on the network (closes #2)
 - 2026-07-07 Adopted scripts-to-rule-them-all: `script/` entrypoints,
   Makefile shims, README Entrypoints section
 - 2026-02-22: repo policy compliance: required policy files, .gitignore
@@ -41,8 +115,9 @@ runs make check on main.
 
 # Future Steps
 
-- Verify main is green after the merge: make check locally and the new
+- Production memory under 5 GiB: whether to test under a real 5 GiB
-  CI workflow passing
+  container limit on fsn1app1 is open for sneak
-- Review stale remote branches fix-min-time-calculation and
+  (https://git.eeqj.de/sneak/routewatch/issues/3)
-  optimize-sqlite-settings: land or delete
+- `/api/v1/stats` answered HTTP 500 after 35 hours on the live feed, seen
-- Clean up the tmp/ directory at the repo root: gitignore or remove
+  on `3898daa`, which predates the 2026-09-22 in-memory statistics
+  (https://git.eeqj.de/sneak/routewatch/issues/30)

entrypoint.sh

@@ -1,7 +1,20 @@
 #!/bin/bash
+set -euo pipefail
 
+# glibc silently ignores a malformed MALLOC_ARENA_MAX, so refuse it here.
+if [[ -n "${MALLOC_ARENA_MAX:-}" && ! "$MALLOC_ARENA_MAX" =~ ^[1-9][0-9]*$ ]]; then
+    echo "MALLOC_ARENA_MAX must be a positive whole number, got '$MALLOC_ARENA_MAX'" >&2
+    exit 1
+fi
+
+# Give the data directory to the routewatch user before the daemon starts,
+# whether it is missing, an empty root-owned mount, or holds another uid's files.
+mkdir -p /var/lib/berlin.sneak.app.routewatch
 cd /var/lib/berlin.sneak.app.routewatch
 chown -R routewatch:routewatch .
 chmod 700 .
 
-exec runuser -u routewatch -- /app/routewatch
+# setpriv replaces itself with the daemon, so the daemon receives the stop
+# signal directly. runuser would stay in between and kill the daemon 2 seconds
+# after passing the signal on.
+exec setpriv --reuid=routewatch --regid=routewatch --init-groups -- /app/routewatch

internal/config/config.go

@@ -6,6 +6,7 @@ import (
 	"os"
 	"path/filepath"
 	"runtime"
+	"strconv"
 	"time"
 )
 
@@ -18,6 +19,12 @@ const (
 
 	// defaultRouteExpirationMinutes is the default route expiration timeout in minutes
 	defaultRouteExpirationMinutes = 5
+
+	// defaultPort is the HTTP port used when PORT is not set
+	defaultPort = 8080
+
+	// maxPort is the highest TCP port number
+	maxPort = 65535
 )
 
 // Config holds configuration for the entire application
@@ -25,6 +32,9 @@ type Config struct {
 	// StateDir is the directory for all application state (database, snapshots)
 	StateDir string
 
+	// Port is the TCP port the HTTP server listens on
+	Port int
+
 	// MaxRuntime is the maximum runtime (0 = run forever)
 	MaxRuntime time.Duration
 
@@ -43,8 +53,14 @@ func New() (*Config, error) {
 		return nil, fmt.Errorf("failed to determine state directory: %w", err)
 	}
 
+	port, err := getPort()
+	if err != nil {
+		return nil, err
+	}
+
 	return &Config{
 		StateDir:                    stateDir,
+		Port:                        port,
 		MaxRuntime:                  0,                                           // Run forever by default
 		EnableBatchedDatabaseWrites: true,                                        // Enable batching by default
 		RouteExpirationTimeout:      defaultRouteExpirationMinutes * time.Minute, // For active route monitoring
@@ -69,13 +85,20 @@ func getStateDirectory() (string, error) {
 		return filepath.Join(home, "Library", "Application Support", AppIdentifier), nil
 
 	case "linux", "freebsd", "openbsd", "netbsd":
+		// The XDG spec requires an absolute path; a relative one would put
+		// the database somewhere unexpected.
+		xdgData := os.Getenv("XDG_DATA_HOME")
+		if xdgData != "" && !filepath.IsAbs(xdgData) {
+			return "", fmt.Errorf("XDG_DATA_HOME must be an absolute path, got %q", xdgData)
+		}
+
 		// Unix-like: /var/lib/berlin.sneak.app.routewatch if root, else XDG_DATA_HOME
 		if os.Geteuid() == 0 {
 			return filepath.Join("/var/lib", AppIdentifier), nil
 		}
 
 		// Check XDG_DATA_HOME first
-		if xdgData := os.Getenv("XDG_DATA_HOME"); xdgData != "" {
+		if xdgData != "" {
 			return filepath.Join(xdgData, AppIdentifier), nil
 		}
 
@@ -92,6 +115,22 @@ func getStateDirectory() (string, error) {
 	}
 }
 
+// getPort returns the HTTP port from PORT, or defaultPort when PORT is not set
+func getPort() (int, error) {
+	value := os.Getenv("PORT")
+	if value == "" {
+		return defaultPort, nil
+	}
+
+	// ParseUint, unlike Atoi, refuses a sign: the health check URL cannot use "+9090"
+	port, err := strconv.ParseUint(value, 10, 0)
+	if err != nil || port < 1 || port > maxPort {
+		return 0, fmt.Errorf("PORT must be a whole number from 1 to %d, got %q", maxPort, value)
+	}
+
+	return int(port), nil
+}
+
 // EnsureDirectories creates all necessary directories if they don't exist
 func (c *Config) EnsureDirectories() error {
 	// Ensure state directory exists

internal/config/config_test.go

@@ -0,0 +1,62 @@
+package config
+
+import (
+	"runtime"
+	"testing"
+)
+
+func TestNewReadsPort(t *testing.T) {
+	tests := map[string]int{
+		"":      defaultPort,
+		"1":     1,
+		"9090":  9090,
+		"65535": 65535,
+	}
+
+	for value, want := range tests {
+		t.Run(value, func(t *testing.T) {
+			t.Setenv("PORT", value)
+			t.Setenv("XDG_DATA_HOME", "")
+
+			cfg, err := New()
+			if err != nil {
+				t.Fatalf("New() with PORT=%q: %v", value, err)
+			}
+
+			if cfg.Port != want {
+				t.Errorf("New() with PORT=%q: Port = %d, want %d", value, cfg.Port, want)
+			}
+		})
+	}
+}
+
+func TestNewRefusesInvalidPort(t *testing.T) {
+	for _, value := range []string{"0", "65536", "-1", "+9090", "http", "80.5"} {
+		t.Run(value, func(t *testing.T) {
+			t.Setenv("PORT", value)
+			t.Setenv("XDG_DATA_HOME", "")
+
+			if _, err := New(); err == nil {
+				t.Errorf("New() with PORT=%q returned no error", value)
+			}
+		})
+	}
+}
+
+func TestNewRefusesRelativeXDGDataHome(t *testing.T) {
+	if runtime.GOOS == "darwin" {
+		t.Skip("macOS does not read XDG_DATA_HOME")
+	}
+
+	t.Setenv("PORT", "")
+
+	t.Setenv("XDG_DATA_HOME", "relative/path")
+	if _, err := New(); err == nil {
+		t.Error("New() with a relative XDG_DATA_HOME returned no error")
+	}
+
+	t.Setenv("XDG_DATA_HOME", "/var/lib")
+	if _, err := New(); err != nil {
+		t.Errorf("New() with XDG_DATA_HOME=/var/lib: %v", err)
+	}
+}

internal/database/counts.go

@@ -0,0 +1,146 @@
+package database
+
+import (
+	"context"
+	"fmt"
+	"sync"
+)
+
+// liveCounts holds the running row counts that the stats endpoints report. They
+// are seeded once at startup from the tables and then adjusted on every write,
+// so a stats read serves them from memory instead of running a COUNT(*) over
+// each table. Those scans, once the database passed a few GiB, took the whole
+// request timeout and made /api/v1/stats return 500 (issue 27).
+//
+// A single mutex guards all fields so the stats reader takes a consistent
+// snapshot at one instant and writers, which already run under the database
+// write lock, adjust the counts after their transaction commits.
+type liveCounts struct {
+	mu         sync.RWMutex
+	asns       int
+	prefixesV4 int
+	prefixesV6 int
+	peerings   int
+	peers      int
+	routesV4   int
+	routesV6   int
+}
+
+// seed sets every count to the value read from the tables at startup. It runs
+// before any writer, so it needs no coordination with the adjust methods.
+func (c *liveCounts) seed(asns, prefixesV4, prefixesV6, peerings, peers, routesV4, routesV6 int) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	c.asns = asns
+	c.prefixesV4 = prefixesV4
+	c.prefixesV6 = prefixesV6
+	c.peerings = peerings
+	c.peers = peers
+	c.routesV4 = routesV4
+	c.routesV6 = routesV6
+}
+
+// addASNs adds n to the ASN count.
+func (c *liveCounts) addASNs(n int) {
+	c.mu.Lock()
+	c.asns += n
+	c.mu.Unlock()
+}
+
+// addPrefixes adds to the IPv4 and IPv6 prefix counts.
+func (c *liveCounts) addPrefixes(v4, v6 int) {
+	c.mu.Lock()
+	c.prefixesV4 += v4
+	c.prefixesV6 += v6
+	c.mu.Unlock()
+}
+
+// addPeerings adds n to the peering count.
+func (c *liveCounts) addPeerings(n int) {
+	c.mu.Lock()
+	c.peerings += n
+	c.mu.Unlock()
+}
+
+// addPeers adds n to the BGP peer count.
+func (c *liveCounts) addPeers(n int) {
+	c.mu.Lock()
+	c.peers += n
+	c.mu.Unlock()
+}
+
+// addRoutes adds to the IPv4 and IPv6 live-route counts. Deletions pass
+// negative values.
+func (c *liveCounts) addRoutes(v4, v6 int) {
+	c.mu.Lock()
+	c.routesV4 += v4
+	c.routesV6 += v6
+	c.mu.Unlock()
+}
+
+// fill copies the counts into a Stats, including the derived totals, under a
+// single read lock so the reader sees one consistent snapshot.
+func (c *liveCounts) fill(s *Stats) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	s.ASNs = c.asns
+	s.IPv4Prefixes = c.prefixesV4
+	s.IPv6Prefixes = c.prefixesV6
+	s.Prefixes = c.prefixesV4 + c.prefixesV6
+	s.Peerings = c.peerings
+	s.Peers = c.peers
+	s.IPv4Routes = c.routesV4
+	s.IPv6Routes = c.routesV6
+	s.LiveRoutes = c.routesV4 + c.routesV6
+}
+
+// countRows returns the number of rows in the named table. It is used only at
+// startup to seed the in-memory counters, so a full COUNT(*) is acceptable.
+func (d *Database) countRows(ctx context.Context, table string) (int, error) {
+	var n int
+	// table is one of a fixed set of literals below, never external input.
+	if err := d.db.QueryRowContext(ctx, "SELECT COUNT(*) FROM "+table).Scan(&n); err != nil {
+		return 0, fmt.Errorf("failed to count %s: %w", table, err)
+	}
+
+	return n, nil
+}
+
+// seedCounts reads the current row counts from the tables into the in-memory
+// counters. It runs once at startup, before the streamer begins writing.
+func (d *Database) seedCounts(ctx context.Context) error {
+	asns, err := d.countRows(ctx, "asns")
+	if err != nil {
+		return err
+	}
+	prefixesV4, err := d.countRows(ctx, "prefixes_v4")
+	if err != nil {
+		return err
+	}
+	prefixesV6, err := d.countRows(ctx, "prefixes_v6")
+	if err != nil {
+		return err
+	}
+	peerings, err := d.countRows(ctx, "peerings")
+	if err != nil {
+		return err
+	}
+	peers, err := d.countRows(ctx, "bgp_peers")
+	if err != nil {
+		return err
+	}
+	routesV4, err := d.countRows(ctx, "live_routes_v4")
+	if err != nil {
+		return err
+	}
+	routesV6, err := d.countRows(ctx, "live_routes_v6")
+	if err != nil {
+		return err
+	}
+
+	d.counts.seed(asns, prefixesV4, prefixesV6, peerings, peers, routesV4, routesV6)
+
+	return nil
+}

internal/database/counts_test.go

@@ -0,0 +1,328 @@
+package database
+
+import (
+	"context"
+	"sync"
+	"testing"
+	"time"
+
+	"git.eeqj.de/sneak/routewatch/internal/config"
+	"git.eeqj.de/sneak/routewatch/internal/logger"
+	"github.com/google/uuid"
+)
+
+// mkV4Route builds an IPv4 live route.
+func mkV4Route(t *testing.T, prefix string, asn int, ts time.Time) *LiveRoute {
+	t.Helper()
+
+	return &LiveRoute{
+		ID:          uuid.New(),
+		Prefix:      prefix,
+		MaskLength:  24,
+		IPVersion:   ipVersionV4,
+		OriginASN:   asn,
+		PeerIP:      "192.0.2.1",
+		ASPath:      []int{asn},
+		NextHop:     "192.0.2.254",
+		LastUpdated: ts,
+	}
+}
+
+// mkV6Route builds an IPv6 live route.
+func mkV6Route(prefix string, asn int, ts time.Time) *LiveRoute {
+	return &LiveRoute{
+		ID:          uuid.New(),
+		Prefix:      prefix,
+		MaskLength:  32,
+		IPVersion:   ipVersionV6,
+		OriginASN:   asn,
+		PeerIP:      "2001:db8::1",
+		ASPath:      []int{asn},
+		NextHop:     "2001:db8::ffff",
+		LastUpdated: ts,
+	}
+}
+
+// TestLiveCountsTrackWritesInRealtime checks that the stats counts start at
+// zero, reflect each write the moment it commits (no recompute, no timer), do
+// not move when a route is merely re-announced, and drop when a route is
+// deleted. These counts are what /api/v1/stats reports; before this change the
+// endpoint recomputed them with a COUNT(*) over each table on every request.
+func TestLiveCountsTrackWritesInRealtime(t *testing.T) {
+	cfg := &config.Config{StateDir: t.TempDir()}
+
+	db, err := New(cfg, logger.New())
+	if err != nil {
+		t.Fatalf("failed to create database: %v", err)
+	}
+	defer func() { _ = db.Close() }()
+
+	ctx := context.Background()
+
+	empty, err := db.GetStatsContext(ctx)
+	if err != nil {
+		t.Fatalf("GetStatsContext on empty database: %v", err)
+	}
+	if empty.ASNs != 0 || empty.Prefixes != 0 || empty.Peerings != 0 ||
+		empty.Peers != 0 || empty.LiveRoutes != 0 {
+		t.Fatalf("empty database counts nonzero: %+v", empty)
+	}
+
+	ts := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
+
+	if err := db.GetOrCreateASNBatch(map[int]time.Time{64500: ts, 64501: ts}); err != nil {
+		t.Fatalf("GetOrCreateASNBatch: %v", err)
+	}
+	if err := db.UpdatePrefixesBatch(map[string]time.Time{
+		"198.51.100.0/24": ts,
+		"2001:db8::/32":   ts,
+	}); err != nil {
+		t.Fatalf("UpdatePrefixesBatch: %v", err)
+	}
+	if err := db.UpdatePeerBatch(map[string]PeerUpdate{
+		"192.0.2.1": {PeerIP: "192.0.2.1", PeerASN: 64500, MessageType: "UPDATE", Timestamp: ts},
+	}); err != nil {
+		t.Fatalf("UpdatePeerBatch: %v", err)
+	}
+	if err := db.RecordPeering(64500, 64501, ts); err != nil {
+		t.Fatalf("RecordPeering: %v", err)
+	}
+
+	routes := []*LiveRoute{
+		mkV4Route(t, "198.51.100.0/24", 64500, ts),
+		mkV4Route(t, "203.0.113.0/24", 64501, ts.Add(time.Minute)),
+		mkV6Route("2001:db8::/32", 64502, ts.Add(2*time.Minute)),
+	}
+	if err := db.UpsertLiveRouteBatch(routes); err != nil {
+		t.Fatalf("UpsertLiveRouteBatch: %v", err)
+	}
+
+	stats, err := db.GetStatsContext(ctx)
+	if err != nil {
+		t.Fatalf("GetStatsContext: %v", err)
+	}
+	assertCounts(t, "after inserts", stats, wantCounts{
+		asns: 2, prefixes: 2, peerings: 1, peers: 1,
+		ipv4Routes: 2, ipv6Routes: 1, liveRoutes: 3,
+	})
+
+	// Re-announcing the same routes is an update, not an insert: counts hold.
+	if err := db.UpsertLiveRouteBatch(routes); err != nil {
+		t.Fatalf("UpsertLiveRouteBatch (re-announce): %v", err)
+	}
+	stats, err = db.GetStatsContext(ctx)
+	if err != nil {
+		t.Fatalf("GetStatsContext: %v", err)
+	}
+	assertCounts(t, "after re-announce", stats, wantCounts{
+		asns: 2, prefixes: 2, peerings: 1, peers: 1,
+		ipv4Routes: 2, ipv6Routes: 1, liveRoutes: 3,
+	})
+
+	// A withdrawal removes one route.
+	if err := db.DeleteLiveRouteBatch([]LiveRouteDeletion{
+		{Prefix: "203.0.113.0/24", OriginASN: 64501, PeerIP: "192.0.2.1", IPVersion: ipVersionV4},
+	}); err != nil {
+		t.Fatalf("DeleteLiveRouteBatch: %v", err)
+	}
+	stats, err = db.GetStatsContext(ctx)
+	if err != nil {
+		t.Fatalf("GetStatsContext: %v", err)
+	}
+	assertCounts(t, "after delete", stats, wantCounts{
+		asns: 2, prefixes: 2, peerings: 1, peers: 1,
+		ipv4Routes: 1, ipv6Routes: 1, liveRoutes: 2,
+	})
+}
+
+// TestLiveCountsSeededFromDatabaseAtStartup writes rows, reopens the same
+// database file, and checks the counts come back from the seed scan rather than
+// starting at zero.
+func TestLiveCountsSeededFromDatabaseAtStartup(t *testing.T) {
+	cfg := &config.Config{StateDir: t.TempDir()}
+
+	db, err := New(cfg, logger.New())
+	if err != nil {
+		t.Fatalf("failed to create database: %v", err)
+	}
+
+	ts := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
+	if err := db.GetOrCreateASNBatch(map[int]time.Time{64500: ts, 64501: ts, 64502: ts}); err != nil {
+		t.Fatalf("GetOrCreateASNBatch: %v", err)
+	}
+	if err := db.UpsertLiveRouteBatch([]*LiveRoute{
+		mkV4Route(t, "198.51.100.0/24", 64500, ts),
+		mkV6Route("2001:db8::/32", 64502, ts),
+	}); err != nil {
+		t.Fatalf("UpsertLiveRouteBatch: %v", err)
+	}
+	if err := db.Close(); err != nil {
+		t.Fatalf("Close: %v", err)
+	}
+
+	reopened, err := New(cfg, logger.New())
+	if err != nil {
+		t.Fatalf("failed to reopen database: %v", err)
+	}
+	defer func() { _ = reopened.Close() }()
+
+	stats, err := reopened.GetStatsContext(context.Background())
+	if err != nil {
+		t.Fatalf("GetStatsContext after reopen: %v", err)
+	}
+	if stats.ASNs != 3 {
+		t.Errorf("seeded ASNs = %d, want 3", stats.ASNs)
+	}
+	if stats.IPv4Routes != 1 || stats.IPv6Routes != 1 || stats.LiveRoutes != 2 {
+		t.Errorf("seeded routes = (v4 %d, v6 %d, total %d), want (1, 1, 2)",
+			stats.IPv4Routes, stats.IPv6Routes, stats.LiveRoutes)
+	}
+}
+
+// TestStatsRouteTimestamps checks the oldest/newest route timestamps are read
+// from the right rows across both tables and parse into time.Time. The old
+// MIN/MAX union query read its result into *time.Time, which the driver could
+// not parse, so it logged a warning every call and left both timestamps nil.
+func TestStatsRouteTimestamps(t *testing.T) {
+	cfg := &config.Config{StateDir: t.TempDir()}
+
+	db, err := New(cfg, logger.New())
+	if err != nil {
+		t.Fatalf("failed to create database: %v", err)
+	}
+	defer func() { _ = db.Close() }()
+
+	ctx := context.Background()
+
+	empty, err := db.GetStatsContext(ctx)
+	if err != nil {
+		t.Fatalf("GetStatsContext on empty database: %v", err)
+	}
+	if empty.OldestRoute != nil || empty.NewestRoute != nil {
+		t.Fatalf("empty database timestamps = (%v, %v), want (nil, nil)",
+			empty.OldestRoute, empty.NewestRoute)
+	}
+
+	base := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
+	oldest := base
+	newest := base.Add(2 * time.Minute)
+	if err := db.UpsertLiveRouteBatch([]*LiveRoute{
+		mkV4Route(t, "198.51.100.0/24", 64500, base.Add(time.Minute)),
+		mkV4Route(t, "203.0.113.0/24", 64501, oldest),
+		mkV6Route("2001:db8::/32", 64502, newest),
+	}); err != nil {
+		t.Fatalf("UpsertLiveRouteBatch: %v", err)
+	}
+
+	stats, err := db.GetStatsContext(ctx)
+	if err != nil {
+		t.Fatalf("GetStatsContext: %v", err)
+	}
+	if stats.OldestRoute == nil || !stats.OldestRoute.Equal(oldest) {
+		t.Errorf("OldestRoute = %v, want %v", stats.OldestRoute, oldest)
+	}
+	if stats.NewestRoute == nil || !stats.NewestRoute.Equal(newest) {
+		t.Errorf("NewestRoute = %v, want %v", stats.NewestRoute, newest)
+	}
+}
+
+// TestLiveCountsConcurrentReadWrite runs writers and stats readers at once so
+// the race detector proves the counters are safe under concurrent use.
+func TestLiveCountsConcurrentReadWrite(t *testing.T) {
+	cfg := &config.Config{StateDir: t.TempDir()}
+
+	db, err := New(cfg, logger.New())
+	if err != nil {
+		t.Fatalf("failed to create database: %v", err)
+	}
+	defer func() { _ = db.Close() }()
+
+	ts := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
+
+	const writers = 4
+	var wg sync.WaitGroup
+
+	wg.Add(writers)
+	for w := range writers {
+		go func(base int) {
+			defer wg.Done()
+			for i := range 25 {
+				asn := 65000 + base*100 + i
+				route := mkV6Route("2001:db8::/32", asn, ts)
+				route.PeerIP = "2001:db8::" + uuid.NewString()
+				if err := db.UpsertLiveRoute(route); err != nil {
+					t.Errorf("UpsertLiveRoute: %v", err)
+
+					return
+				}
+			}
+		}(w)
+	}
+
+	var readerWG sync.WaitGroup
+	readerWG.Add(1)
+	stop := make(chan struct{})
+	go func() {
+		defer readerWG.Done()
+		for {
+			select {
+			case <-stop:
+				return
+			default:
+				if _, err := db.GetStatsContext(context.Background()); err != nil {
+					t.Errorf("GetStatsContext: %v", err)
+
+					return
+				}
+			}
+		}
+	}()
+
+	wg.Wait()
+	close(stop)
+	readerWG.Wait()
+
+	stats, err := db.GetStatsContext(context.Background())
+	if err != nil {
+		t.Fatalf("GetStatsContext: %v", err)
+	}
+	if want := writers * 25; stats.IPv6Routes != want {
+		t.Errorf("IPv6Routes = %d, want %d", stats.IPv6Routes, want)
+	}
+}
+
+type wantCounts struct {
+	asns       int
+	prefixes   int
+	peerings   int
+	peers      int
+	ipv4Routes int
+	ipv6Routes int
+	liveRoutes int
+}
+
+func assertCounts(t *testing.T, when string, got Stats, want wantCounts) {
+	t.Helper()
+
+	if got.ASNs != want.asns {
+		t.Errorf("%s: ASNs = %d, want %d", when, got.ASNs, want.asns)
+	}
+	if got.Prefixes != want.prefixes {
+		t.Errorf("%s: Prefixes = %d, want %d", when, got.Prefixes, want.prefixes)
+	}
+	if got.Peerings != want.peerings {
+		t.Errorf("%s: Peerings = %d, want %d", when, got.Peerings, want.peerings)
+	}
+	if got.Peers != want.peers {
+		t.Errorf("%s: Peers = %d, want %d", when, got.Peers, want.peers)
+	}
+	if got.IPv4Routes != want.ipv4Routes {
+		t.Errorf("%s: IPv4Routes = %d, want %d", when, got.IPv4Routes, want.ipv4Routes)
+	}
+	if got.IPv6Routes != want.ipv6Routes {
+		t.Errorf("%s: IPv6Routes = %d, want %d", when, got.IPv6Routes, want.ipv6Routes)
+	}
+	if got.LiveRoutes != want.liveRoutes {
+		t.Errorf("%s: LiveRoutes = %d, want %d", when, got.LiveRoutes, want.liveRoutes)
+	}
+}

internal/database/database_test.go

@@ -3,23 +3,36 @@ package database
 import (
 	"context"
 	"database/sql"
-	"net"
+	"errors"
+	"fmt"
+	"net/netip"
 	"sync"
 	"testing"
 	"time"
 
 	"git.eeqj.de/sneak/routewatch/internal/config"
 	"git.eeqj.de/sneak/routewatch/internal/logger"
+	"github.com/google/uuid"
 )
 
 // tempStoreMemory is the PRAGMA temp_store value meaning "hold temp B-trees in
 // memory"; the DSN change must leave temp_store below this so they spill to disk.
 const tempStoreMemory = 2
 
+// autoVacuumIncremental is the PRAGMA auto_vacuum value meaning "incremental".
+const autoVacuumIncremental = 2
+
+// vacuumTestRoutes is how many routes the vacuum test writes and then deletes,
+// enough to leave many free pages in the file.
+const vacuumTestRoutes = 2000
+
 // heldConnections is how many pooled connections the pragma test holds open at
 // once so each is a distinct SQLite connection that parsed the DSN.
 const heldConnections = 5
 
+// testPeerIP is the peer every route in the IP lookup test is learned from.
+const testPeerIP = "192.0.2.254"
+
 // Parameters for the checkpoint-contention regression test.
 const (
 	// contentionIterations is how many batch writes race the checkpoint loop.
@@ -32,286 +45,98 @@ const (
 	asnSecondBand = 100
 )
 
-func TestIPToUint32(t *testing.T) {
+// TestGetIPInfoFindsMostSpecificLiveRoute stores nested live prefixes for both
-	tests := []struct {
+// families and checks that a lookup returns the most specific one covering the
-		name     string
+// address, ErrNoRoute when none covers it, and the next less specific prefix
-		ip       string
+// once the only route of the most specific one is withdrawn.
-		expected uint32
+func TestGetIPInfoFindsMostSpecificLiveRoute(t *testing.T) {
-	}{
+	cfg := &config.Config{StateDir: t.TempDir()}
-		{
+
-			name:     "Simple IP",
+	db, err := New(cfg, logger.New())
-			ip:       "192.168.1.1",
+	if err != nil {
-			expected: 3232235777, // 192<<24 + 168<<16 + 1<<8 + 1
+		t.Fatalf("failed to create database: %v", err)
-		},
-		{
-			name:     "Minimum IP",
-			ip:       "0.0.0.0",
-			expected: 0,
-		},
-		{
-			name:     "Maximum IP",
-			ip:       "255.255.255.255",
-			expected: 4294967295,
-		},
-		{
-			name:     "10.0.0.0",
-			ip:       "10.0.0.0",
-			expected: 167772160,
-		},
-		{
-			name:     "172.16.0.0",
-			ip:       "172.16.0.0",
-			expected: 2886729728,
-		},
-		{
-			name:     "8.8.8.8",
-			ip:       "8.8.8.8",
-			expected: 134744072,
-		},
-		{
-			name:     "1.2.3.4",
-			ip:       "1.2.3.4",
-			expected: 16909060,
-		},
 	}
+	defer func() { _ = db.Close() }()
 
-	for _, tt := range tests {
+	// Nested live prefixes, each originated by its own AS.
-		t.Run(tt.name, func(t *testing.T) {
+	origins := map[string]int{
-			ip := net.ParseIP(tt.ip)
+		"10.0.0.0/8":        64500,
-			if ip == nil {
+		"10.1.0.0/16":       64501,
-				t.Fatalf("Failed to parse IP: %s", tt.ip)
+		"10.1.2.0/24":       64502,
-			}
+		"2001:db8::/32":     64500,
-
+		"2001:db8:1::/48":   64501,
-			result := ipToUint32(ip)
+		"2001:db8:1:2::/64": 64502,
-			if result != tt.expected {
+	}
-				t.Errorf("ipToUint32(%s) = %d, want %d", tt.ip, result, tt.expected)
+	ts := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
-			}
+	routes := make([]*LiveRoute, 0, len(origins))
-
+	for prefix, asn := range origins {
-			// Test with IPv4-mapped IPv6 address
+		routes = append(routes, &LiveRoute{
-			ip6 := net.ParseIP(tt.ip).To16()
+			ID:          uuid.New(),
-			if ip6 != nil {
+			Prefix:      prefix,
-				result6 := ipToUint32(ip6)
+			MaskLength:  netip.MustParsePrefix(prefix).Bits(),
-				if result6 != tt.expected {
+			IPVersion:   detectIPVersion(prefix),
-					t.Errorf("ipToUint32(%s as IPv6) = %d, want %d", tt.ip, result6, tt.expected)
+			OriginASN:   asn,
-				}
+			PeerIP:      testPeerIP,
-			}
+			ASPath:      []int{asn},
+			NextHop:     testPeerIP,
+			LastUpdated: ts,
 		})
 	}
-}
+	if err := db.UpsertLiveRouteBatch(routes); err != nil {
-
+		t.Fatalf("UpsertLiveRouteBatch: %v", err)
-func TestCalculateIPv4Range(t *testing.T) {
-	tests := []struct {
-		name      string
-		cidr      string
-		wantStart uint32
-		wantEnd   uint32
-		wantErr   bool
-	}{
-		{
-			name:      "Single IP /32",
-			cidr:      "192.168.1.1/32",
-			wantStart: 3232235777,
-			wantEnd:   3232235777,
-		},
-		{
-			name:      "Class C /24",
-			cidr:      "192.168.1.0/24",
-			wantStart: 3232235776, // 192.168.1.0
-			wantEnd:   3232236031, // 192.168.1.255
-		},
-		{
-			name:      "Class B /16",
-			cidr:      "192.168.0.0/16",
-			wantStart: 3232235520, // 192.168.0.0
-			wantEnd:   3232301055, // 192.168.255.255
-		},
-		{
-			name:      "Class A /8",
-			cidr:      "10.0.0.0/8",
-			wantStart: 167772160, // 10.0.0.0
-			wantEnd:   184549375, // 10.255.255.255
-		},
-		{
-			name:      "Entire IPv4 space /0",
-			cidr:      "0.0.0.0/0",
-			wantStart: 0,
-			wantEnd:   4294967295,
-		},
-		{
-			name:      "Small subnet /30",
-			cidr:      "192.168.1.0/30",
-			wantStart: 3232235776, // 192.168.1.0
-			wantEnd:   3232235779, // 192.168.1.3
-		},
-		{
-			name:      "Medium subnet /20",
-			cidr:      "172.16.0.0/20",
-			wantStart: 2886729728, // 172.16.0.0
-			wantEnd:   2886733823, // 172.16.15.255
-		},
-		{
-			name:      "Private range 172.16/12",
-			cidr:      "172.16.0.0/12",
-			wantStart: 2886729728, // 172.16.0.0
-			wantEnd:   2887778303, // 172.31.255.255
-		},
-		{
-			name:      "Google DNS /29",
-			cidr:      "8.8.8.8/29",
-			wantStart: 134744072, // 8.8.8.8 (network is actually 8.8.8.8 with /29)
-			wantEnd:   134744079, // 8.8.8.15
-		},
-		{
-			name:      "Non-zero host bits",
-			cidr:      "192.168.1.5/24",
-			wantStart: 3232235776, // 192.168.1.0 (network address)
-			wantEnd:   3232236031, // 192.168.1.255
-		},
-		{
-			name:    "Invalid CIDR",
-			cidr:    "192.168.1.1/33",
-			wantErr: true,
-		},
-		{
-			name:    "Invalid IP",
-			cidr:    "256.256.256.256/24",
-			wantErr: true,
-		},
-		{
-			name:    "IPv6 CIDR",
-			cidr:    "2001:db8::/32",
-			wantErr: true,
-		},
-		{
-			name:    "Empty CIDR",
-			cidr:    "",
-			wantErr: true,
-		},
-		{
-			name:    "Missing mask",
-			cidr:    "192.168.1.1",
-			wantErr: true,
-		},
 	}
 
-	for _, tt := range tests {
+	// lookup checks that ip resolves to the live prefix want, or to ErrNoRoute
-		t.Run(tt.name, func(t *testing.T) {
+	// when want is empty.
-			start, end, err := CalculateIPv4Range(tt.cidr)
+	lookup := func(ip, want string) {
+		t.Helper()
 
-			if tt.wantErr {
+		info, err := db.GetIPInfo(ip)
-				if err == nil {
+		if want == "" {
-					t.Errorf("CalculateIPv4Range(%s) expected error, got nil", tt.cidr)
+			if !errors.Is(err, ErrNoRoute) {
-				}
+				t.Errorf("GetIPInfo(%s) = %+v, %v; want ErrNoRoute", ip, info, err)
-				return
 			}
 
-			if err != nil {
+			return
-				t.Errorf("CalculateIPv4Range(%s) unexpected error: %v", tt.cidr, err)
+		}
-				return
+		if err != nil {
-			}
+			t.Errorf("GetIPInfo(%s): %v", ip, err)
 
-			if start != tt.wantStart {
+			return
-				t.Errorf("CalculateIPv4Range(%s) start = %d, want %d", tt.cidr, start, tt.wantStart)
+		}
-			}
+		if info.Netblock != want || info.MaskLength != netip.MustParsePrefix(want).Bits() ||
-
+			info.ASN != origins[want] {
-			if end != tt.wantEnd {
+			t.Errorf("GetIPInfo(%s) = %s (mask %d) AS%d, want %s AS%d",
-				t.Errorf("CalculateIPv4Range(%s) end = %d, want %d", tt.cidr, end, tt.wantEnd)
+				ip, info.Netblock, info.MaskLength, info.ASN, want, origins[want])
-			}
+		}
-
-			// Verify that start <= end
-			if start > end {
-				t.Errorf("CalculateIPv4Range(%s) start (%d) > end (%d)", tt.cidr, start, end)
-			}
-
-			// Verify the range size matches the CIDR mask
-			if !tt.wantErr && tt.cidr != "" {
-				_, ipNet, _ := net.ParseCIDR(tt.cidr)
-				if ipNet != nil {
-					ones, bits := ipNet.Mask.Size()
-					expectedSize := uint32(1) << uint(bits-ones)
-					actualSize := end - start + 1
-					if actualSize != expectedSize {
-						t.Errorf("CalculateIPv4Range(%s) range size = %d, want %d", tt.cidr, actualSize, expectedSize)
-					}
-				}
-			}
-		})
-	}
-}
-
-func TestIPv4RangeIntegration(t *testing.T) {
-	// Test that our functions work correctly together
-	tests := []struct {
-		name          string
-		cidr          string
-		testIPs       []string
-		shouldContain []bool
-	}{
-		{
-			name: "192.168.1.0/24",
-			cidr: "192.168.1.0/24",
-			testIPs: []string{
-				"192.168.1.0",
-				"192.168.1.1",
-				"192.168.1.255",
-				"192.168.0.255",
-				"192.168.2.0",
-			},
-			shouldContain: []bool{true, true, true, false, false},
-		},
-		{
-			name: "10.0.0.0/8",
-			cidr: "10.0.0.0/8",
-			testIPs: []string{
-				"10.0.0.0",
-				"10.255.255.255",
-				"10.1.2.3",
-				"9.255.255.255",
-				"11.0.0.0",
-			},
-			shouldContain: []bool{true, true, true, false, false},
-		},
-		{
-			name: "172.16.0.0/12",
-			cidr: "172.16.0.0/12",
-			testIPs: []string{
-				"172.16.0.0",
-				"172.31.255.255",
-				"172.20.1.1",
-				"172.15.255.255",
-				"172.32.0.0",
-			},
-			shouldContain: []bool{true, true, true, false, false},
-		},
 	}
 
-	for _, tt := range tests {
+	lookup("10.1.2.3", "10.1.2.0/24")
-		t.Run(tt.name, func(t *testing.T) {
+	lookup("::ffff:10.1.2.3", "10.1.2.0/24")
-			start, end, err := CalculateIPv4Range(tt.cidr)
+	lookup("10.1.3.4", "10.1.0.0/16")
-			if err != nil {
+	lookup("10.2.0.1", "10.0.0.0/8")
-				t.Fatalf("Failed to calculate range for %s: %v", tt.cidr, err)
+	lookup("192.0.2.1", "")
-			}
+	lookup("2001:db8:1:2::3", "2001:db8:1:2::/64")
+	lookup("2001:db8:1:3::4", "2001:db8:1::/48")
+	lookup("2001:db8:2::1", "2001:db8::/32")
+	lookup("2001:db9::1", "")
 
-			for i, testIP := range tt.testIPs {
+	err = db.DeleteLiveRouteBatch([]LiveRouteDeletion{
-				ip := net.ParseIP(testIP)
+		{Prefix: "10.1.2.0/24", OriginASN: 64502, PeerIP: testPeerIP, IPVersion: ipVersionV4},
-				if ip == nil {
+		{Prefix: "2001:db8:1:2::/64", OriginASN: 64502, PeerIP: testPeerIP, IPVersion: ipVersionV6},
-					t.Fatalf("Failed to parse test IP: %s", testIP)
+	})
-				}
+	if err != nil {
-
+		t.Fatalf("DeleteLiveRouteBatch: %v", err)
-				ipUint := ipToUint32(ip)
-				contained := ipUint >= start && ipUint <= end
-
-				if contained != tt.shouldContain[i] {
-					t.Errorf("IP %s in range %s: got %v, want %v", testIP, tt.cidr, contained, tt.shouldContain[i])
-				}
-			}
-		})
 	}
+
+	lookup("10.1.2.3", "10.1.0.0/16")
+	lookup("2001:db8:1:2::3", "2001:db8:1::/48")
 }
 
 // TestConnectionPoolPragmas holds several pooled connections open at once and
 // checks each one carries the per-connection settings from the DSN, plus the
-// process-wide hard heap limit.
+// process-wide hard heap limit, and sees the new file with auto_vacuum
+// incremental.
 func TestConnectionPoolPragmas(t *testing.T) {
 	cfg := &config.Config{StateDir: t.TempDir()}
 
@@ -372,6 +197,74 @@ func TestConnectionPoolPragmas(t *testing.T) {
 		if hardHeapLimit != sqliteHardHeapLimitBytes {
 			t.Errorf("conn %d: hard_heap_limit = %d, want %d", i, hardHeapLimit, sqliteHardHeapLimitBytes)
 		}
+
+		var autoVacuum int
+		if err := c.QueryRowContext(ctx, "PRAGMA auto_vacuum").Scan(&autoVacuum); err != nil {
+			t.Fatalf("conn %d: failed to read auto_vacuum: %v", i, err)
+		}
+		if autoVacuum != autoVacuumIncremental {
+			t.Errorf("conn %d: auto_vacuum = %d, want %d (incremental)", i, autoVacuum, autoVacuumIncremental)
+		}
+	}
+}
+
+// TestVacuumReturnsFreePages checks that after routes are deleted from a new
+// database, one Vacuum call returns every page they used. The deletes leave
+// fewer free pages than the 1000 Vacuum frees per call, so none may remain.
+// With auto_vacuum off (issue https://git.eeqj.de/sneak/routewatch/issues/43)
+// the free pages stayed in the file, and with the PRAGMA run by ExecContext
+// Vacuum freed only one page per call.
+func TestVacuumReturnsFreePages(t *testing.T) {
+	cfg := &config.Config{StateDir: t.TempDir()}
+
+	db, err := New(cfg, logger.New())
+	if err != nil {
+		t.Fatalf("failed to create database: %v", err)
+	}
+	defer func() { _ = db.Close() }()
+
+	ctx := context.Background()
+	ts := time.Now().UTC()
+	const asn = 64500
+
+	routes := make([]*LiveRoute, 0, vacuumTestRoutes)
+	deletions := make([]LiveRouteDeletion, 0, vacuumTestRoutes)
+	for i := range vacuumTestRoutes {
+		route := mkV4Route(t, fmt.Sprintf("10.%d.%d.0/24", i/256, i%256), asn, ts)
+		routes = append(routes, route)
+		deletions = append(deletions, LiveRouteDeletion{
+			Prefix:    route.Prefix,
+			OriginASN: asn,
+			PeerIP:    route.PeerIP,
+			IPVersion: ipVersionV4,
+		})
+	}
+
+	if err := db.UpsertLiveRouteBatch(routes); err != nil {
+		t.Fatalf("failed to write routes: %v", err)
+	}
+	if err := db.DeleteLiveRouteBatch(deletions); err != nil {
+		t.Fatalf("failed to delete routes: %v", err)
+	}
+
+	var before int
+	if err := db.db.QueryRowContext(ctx, "PRAGMA freelist_count").Scan(&before); err != nil {
+		t.Fatalf("failed to read freelist_count: %v", err)
+	}
+	if before == 0 {
+		t.Fatalf("no free pages after deleting %d routes", vacuumTestRoutes)
+	}
+
+	if err := db.Vacuum(ctx); err != nil {
+		t.Fatalf("Vacuum failed: %v", err)
+	}
+
+	var after int
+	if err := db.db.QueryRowContext(ctx, "PRAGMA freelist_count").Scan(&after); err != nil {
+		t.Fatalf("failed to read freelist_count: %v", err)
+	}
+	if after != 0 {
+		t.Errorf("free pages after Vacuum = %d of %d, want 0", after, before)
 	}
 }
 
@@ -424,21 +317,3 @@ func TestBatchWriteDuringCheckpoint(t *testing.T) {
 	cancel()
 	wg.Wait()
 }
-
-func BenchmarkIPToUint32(b *testing.B) {
-	ip := net.ParseIP("192.168.1.1")
-	b.ResetTimer()
-
-	for i := 0; i < b.N; i++ {
-		_ = ipToUint32(ip)
-	}
-}
-
-func BenchmarkCalculateIPv4Range(b *testing.B) {
-	cidr := "192.168.0.0/16"
-	b.ResetTimer()
-
-	for i := 0; i < b.N; i++ {
-		_, _, _ = CalculateIPv4Range(cidr)
-	}
-}

internal/database/interface.go

@@ -18,6 +18,8 @@ type Stats struct {
 	Peers                  int
 	FileSizeBytes          int64
 	LiveRoutes             int
+	IPv4Routes             int
+	IPv6Routes             int
 	OldestRoute            *time.Time
 	NewestRoute            *time.Time
 	IPv4PrefixDistribution []PrefixDistribution
@@ -61,8 +63,6 @@ type Store interface {
 	GetLiveRouteCountsContext(ctx context.Context) (ipv4Count, ipv6Count int, err error)
 
 	// IP lookup operations
-	GetASInfoForIP(ip string) (*ASInfo, error)
-	GetASInfoForIPContext(ctx context.Context, ip string) (*ASInfo, error)
 	GetIPInfo(ip string) (*IPInfo, error)
 	GetIPInfoContext(ctx context.Context, ip string) (*IPInfo, error)
 

internal/database/models.go

@@ -77,9 +77,6 @@ type LiveRoute struct {
 	ASPath      []int     `json:"as_path"`
 	NextHop     string    `json:"next_hop"`
 	LastUpdated time.Time `json:"last_updated"`
-	// IPv4 range fields for fast lookups (nil for IPv6)
-	V4IPStart *uint32 `json:"v4_ip_start,omitempty"`
-	V4IPEnd   *uint32 `json:"v4_ip_end,omitempty"`
 }
 
 // PrefixDistribution represents the distribution of prefixes by mask length
@@ -88,16 +85,6 @@ type PrefixDistribution struct {
 	Count      int `json:"count"`
 }
 
-// ASInfo represents AS information for an IP lookup (legacy format)
-type ASInfo struct {
-	ASN         int       `json:"asn"`
-	Handle      string    `json:"handle"`
-	Description string    `json:"description"`
-	Prefix      string    `json:"prefix"`
-	LastUpdated time.Time `json:"last_updated"`
-	Age         string    `json:"age"`
-}
-
 // IPInfo represents comprehensive IP information for the /ip endpoint
 type IPInfo struct {
 	IP         string   `json:"ip"`

internal/database/schema.sql

@@ -107,9 +107,6 @@ CREATE TABLE IF NOT EXISTS live_routes_v4 (
 	as_path TEXT NOT NULL, -- JSON array
 	next_hop TEXT NOT NULL,
 	last_updated DATETIME NOT NULL,
-	-- IPv4 range columns for fast lookups
-	ip_start INTEGER NOT NULL, -- Start of IPv4 range as 32-bit unsigned int
-	ip_end INTEGER NOT NULL,    -- End of IPv4 range as 32-bit unsigned int
 	UNIQUE(prefix, origin_asn, peer_ip)
 );
 
@@ -123,7 +120,6 @@ CREATE TABLE IF NOT EXISTS live_routes_v6 (
 	as_path TEXT NOT NULL, -- JSON array
 	next_hop TEXT NOT NULL,
 	last_updated DATETIME NOT NULL,
-	-- Note: IPv6 doesn't use integer range columns
 	UNIQUE(prefix, origin_asn, peer_ip)
 );
 
@@ -132,8 +128,6 @@ CREATE INDEX IF NOT EXISTS idx_live_routes_v4_prefix ON live_routes_v4(prefix);
 CREATE INDEX IF NOT EXISTS idx_live_routes_v4_mask_length ON live_routes_v4(mask_length);
 CREATE INDEX IF NOT EXISTS idx_live_routes_v4_origin_asn ON live_routes_v4(origin_asn);
 CREATE INDEX IF NOT EXISTS idx_live_routes_v4_last_updated ON live_routes_v4(last_updated);
--- Indexes for IPv4 range queries
-CREATE INDEX IF NOT EXISTS idx_live_routes_v4_ip_range ON live_routes_v4(ip_start, ip_end);
 -- Index to optimize prefix distribution queries
 CREATE INDEX IF NOT EXISTS idx_live_routes_v4_mask_prefix ON live_routes_v4(mask_length, prefix);
 

internal/routewatch/app_integration_test.go

@@ -232,25 +232,6 @@ func (m *mockStore) GetLiveRouteCountsContext(ctx context.Context) (ipv4Count, i
 	return m.GetLiveRouteCounts()
 }
 
-// GetASInfoForIP mock implementation
-func (m *mockStore) GetASInfoForIP(ip string) (*database.ASInfo, error) {
-	// Simple mock - return a test AS
-	now := time.Now()
-	return &database.ASInfo{
-		ASN:         15169,
-		Handle:      "GOOGLE",
-		Description: "Google LLC",
-		Prefix:      "8.8.8.0/24",
-		LastUpdated: now.Add(-5 * time.Minute),
-		Age:         "5m0s",
-	}, nil
-}
-
-// GetASInfoForIPContext mock implementation with context support
-func (m *mockStore) GetASInfoForIPContext(ctx context.Context, ip string) (*database.ASInfo, error) {
-	return m.GetASInfoForIP(ip)
-}
-
 // GetASDetails mock implementation
 func (m *mockStore) GetASDetails(asn int) (*database.ASN, []database.LiveRoute, error) {
 	m.mu.Lock()
@@ -450,7 +431,7 @@ func TestRouteWatchLiveFeed(t *testing.T) {
 	}
 
 	// Create server
-	srv := server.New(mockDB, s, logger)
+	srv := server.New(mockDB, s, logger, cfg)
 
 	// Create RouteWatch with 5 second limit
 	deps := Dependencies{

internal/routewatch/prefixhandler.go

@@ -2,6 +2,7 @@ package routewatch
 
 import (
 	"net"
+	"net/netip"
 	"strings"
 	"sync"
 	"time"
@@ -108,7 +109,7 @@ func (h *PrefixHandler) HandleMessage(msg *ristypes.RISMessage) {
 	for _, announcement := range msg.Announcements {
 		for _, prefix := range announcement.Prefixes {
 			h.batch = append(h.batch, prefixUpdate{
-				prefix:      prefix,
+				prefix:      canonicalPrefix(prefix),
 				originASN:   originASN,
 				peer:        msg.Peer,
 				messageType: "announcement",
@@ -125,7 +126,7 @@ func (h *PrefixHandler) HandleMessage(msg *ristypes.RISMessage) {
 	// Process withdrawals
 	for _, prefix := range msg.Withdrawals {
 		h.batch = append(h.batch, prefixUpdate{
-			prefix:      prefix,
+			prefix:      canonicalPrefix(prefix),
 			originASN:   originASN, // Use the originASN from path if available
 			peer:        msg.Peer,
 			messageType: "withdrawal",
@@ -264,6 +265,21 @@ func (h *PrefixHandler) flushBatchLocked() {
 	h.lastFlush = time.Now()
 }
 
+// canonicalPrefix returns prefix in the text form net/netip prints, the form
+// the IP lookup builds when it looks a prefix up. The feed sends IPv6
+// announcements compressed ("2001:db8::/32") but IPv6 withdrawals uncompressed
+// ("2001:db8:0:0:0:0:0:0/32"); stored as received, a withdrawal would not match
+// the route its announcement stored. A prefix that does not parse is returned
+// unchanged, and the batch flush reports it.
+func canonicalPrefix(prefix string) string {
+	p, err := netip.ParsePrefix(prefix)
+	if err != nil {
+		return prefix
+	}
+
+	return p.Masked().String()
+}
+
 // parseCIDR extracts the mask length and IP version from a prefix string
 func parseCIDR(prefix string) (maskLength int, ipVersion int, err error) {
 	_, ipNet, err := net.ParseCIDR(prefix)
@@ -315,20 +331,6 @@ func (h *PrefixHandler) processAnnouncement(_ *database.Prefix, update prefixUpd
 		LastUpdated: update.timestamp,
 	}
 
-	// For IPv4, calculate the IP range
-	if ipVersion == ipv4Version {
-		start, end, err := database.CalculateIPv4Range(update.prefix)
-		if err == nil {
-			liveRoute.V4IPStart = &start
-			liveRoute.V4IPEnd = &end
-		} else {
-			h.logger.Error("Failed to calculate IPv4 range",
-				"prefix", update.prefix,
-				"error", err,
-			)
-		}
-	}
-
 	if err := h.db.UpsertLiveRoute(liveRoute); err != nil {
 		h.logger.Error("Failed to upsert live route",
 			"prefix", update.prefix,
@@ -372,20 +374,6 @@ func (h *PrefixHandler) createLiveRoute(update prefixUpdate) *database.LiveRoute
 		LastUpdated: update.timestamp,
 	}
 
-	// For IPv4, calculate the IP range
-	if ipVersion == ipv4Version {
-		start, end, err := database.CalculateIPv4Range(update.prefix)
-		if err == nil {
-			liveRoute.V4IPStart = &start
-			liveRoute.V4IPEnd = &end
-		} else {
-			h.logger.Error("Failed to calculate IPv4 range",
-				"prefix", update.prefix,
-				"error", err,
-			)
-		}
-	}
-
 	return liveRoute
 }
 
@@ -425,20 +413,6 @@ func (h *PrefixHandler) processAnnouncementDirect(update prefixUpdate) {
 		LastUpdated: update.timestamp,
 	}
 
-	// For IPv4, calculate the IP range
-	if ipVersion == ipv4Version {
-		start, end, err := database.CalculateIPv4Range(update.prefix)
-		if err == nil {
-			liveRoute.V4IPStart = &start
-			liveRoute.V4IPEnd = &end
-		} else {
-			h.logger.Error("Failed to calculate IPv4 range",
-				"prefix", update.prefix,
-				"error", err,
-			)
-		}
-	}
-
 	if err := h.db.UpsertLiveRoute(liveRoute); err != nil {
 		h.logger.Error("Failed to upsert live route",
 			"prefix", update.prefix,

internal/routewatch/prefixhandler_test.go

@@ -0,0 +1,74 @@
+package routewatch
+
+import (
+	"errors"
+	"testing"
+	"time"
+
+	"git.eeqj.de/sneak/routewatch/internal/config"
+	"git.eeqj.de/sneak/routewatch/internal/database"
+	"git.eeqj.de/sneak/routewatch/internal/logger"
+	"git.eeqj.de/sneak/routewatch/internal/ristypes"
+)
+
+const testPeerIP = "2001:db8:ffff::1"
+
+// TestPrefixHandlerStoresPrefixesTheIPLookupFinds runs announcements and
+// withdrawals through the prefix handler into a real database and looks the
+// addresses up. The prefixes are written the way the feed sends them: IPv6
+// announcements compressed, IPv6 withdrawals uncompressed. The withdrawal must
+// remove the route the announcement stored, and the IP lookup must find the
+// stored prefix.
+func TestPrefixHandlerStoresPrefixesTheIPLookupFinds(t *testing.T) {
+	db, err := database.New(&config.Config{StateDir: t.TempDir()}, logger.New())
+	if err != nil {
+		t.Fatalf("failed to create database: %v", err)
+	}
+	defer func() { _ = db.Close() }()
+
+	// Built without NewPrefixHandler's flush timer, so the test flushes itself.
+	h := &PrefixHandler{db: db, logger: logger.New()}
+	flush := func() {
+		h.mu.Lock()
+		defer h.mu.Unlock()
+		h.flushBatchLocked()
+	}
+
+	ts := time.Date(2026, 1, 2, 3, 4, 5, 0, time.UTC)
+	h.HandleMessage(&ristypes.RISMessage{
+		Peer:            testPeerIP,
+		Path:            ristypes.ASPath{testASNA, testASNB},
+		ParsedTimestamp: ts,
+		Announcements: []ristypes.RISAnnouncement{{
+			NextHop:  testPeerIP,
+			Prefixes: []string{"2001:db8:1::/48", "192.0.2.0/24"},
+		}},
+	})
+	flush()
+
+	for ip, want := range map[string]string{
+		"2001:db8:1::1": "2001:db8:1::/48",
+		"192.0.2.1":     "192.0.2.0/24",
+	} {
+		info, err := db.GetIPInfo(ip)
+		if err != nil {
+			t.Fatalf("GetIPInfo(%s) after announcement: %v", ip, err)
+		}
+		if info.Netblock != want || info.ASN != testASNB {
+			t.Errorf("GetIPInfo(%s) = %s AS%d, want %s AS%d", ip, info.Netblock, info.ASN, want, testASNB)
+		}
+	}
+
+	h.HandleMessage(&ristypes.RISMessage{
+		Peer:            testPeerIP,
+		ParsedTimestamp: ts.Add(time.Minute),
+		Withdrawals:     []string{"2001:db8:1:0:0:0:0:0/48", "192.0.2.0/24"},
+	})
+	flush()
+
+	for _, ip := range []string{"2001:db8:1::1", "192.0.2.1"} {
+		if info, err := db.GetIPInfo(ip); !errors.Is(err, database.ErrNoRoute) {
+			t.Errorf("GetIPInfo(%s) after withdrawal = %+v, %v; want ErrNoRoute", ip, info, err)
+		}
+	}
+}

internal/server/handlers.go

@@ -219,13 +219,6 @@ func (s *Server) handleStatusJSON() http.HandlerFunc {
 
 		const bitsPerMegabit = 1000000.0
 
-		// Get route counts from database
-		ipv4Routes, ipv6Routes, err := s.db.GetLiveRouteCountsContext(ctx)
-		if err != nil {
-			s.logger.Warn("Failed to get live route counts", "error", err)
-			// Continue with zero counts
-		}
-
 		// Get route update metrics
 		routeMetrics := s.streamer.GetMetricsTracker().GetRouteMetrics()
 
@@ -259,8 +252,8 @@ func (s *Server) handleStatusJSON() http.HandlerFunc {
 			Peers:                  dbStats.Peers,
 			DatabaseSizeBytes:      dbStats.FileSizeBytes,
 			LiveRoutes:             dbStats.LiveRoutes,
-			IPv4Routes:             ipv4Routes,
+			IPv4Routes:             dbStats.IPv4Routes,
-			IPv6Routes:             ipv6Routes,
+			IPv6Routes:             dbStats.IPv6Routes,
 			OldestRoute:            dbStats.OldestRoute,
 			NewestRoute:            dbStats.NewestRoute,
 			IPv4UpdatesPerSec:      routeMetrics.IPv4UpdatesPerSec,
@@ -439,13 +432,6 @@ func (s *Server) handleStats() http.HandlerFunc {
 
 		const bitsPerMegabit = 1000000.0
 
-		// Get route counts from database
-		ipv4Routes, ipv6Routes, err := s.db.GetLiveRouteCountsContext(ctx)
-		if err != nil {
-			s.logger.Warn("Failed to get live route counts", "error", err)
-			// Continue with zero counts
-		}
-
 		// Get route update metrics
 		routeMetrics := s.streamer.GetMetricsTracker().GetRouteMetrics()
 
@@ -537,8 +523,8 @@ func (s *Server) handleStats() http.HandlerFunc {
 			Peers:                  dbStats.Peers,
 			DatabaseSizeBytes:      dbStats.FileSizeBytes,
 			LiveRoutes:             dbStats.LiveRoutes,
-			IPv4Routes:             ipv4Routes,
+			IPv4Routes:             dbStats.IPv4Routes,
-			IPv6Routes:             ipv6Routes,
+			IPv6Routes:             dbStats.IPv6Routes,
 			OldestRoute:            dbStats.OldestRoute,
 			NewestRoute:            dbStats.NewestRoute,
 			IPv4UpdatesPerSec:      routeMetrics.IPv4UpdatesPerSec,

internal/server/handlers_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"git.eeqj.de/sneak/routewatch/internal/config"
 	"git.eeqj.de/sneak/routewatch/internal/database"
 	"git.eeqj.de/sneak/routewatch/internal/logger"
 	"git.eeqj.de/sneak/routewatch/internal/metrics"
@@ -38,7 +39,7 @@ func (d blockingStatsDB) GetStatsContext(_ context.Context) (database.Stats, err
 func TestStatsHandlersDoNotLeakOnTimeout(t *testing.T) {
 	release := make(chan struct{})
 	db := blockingStatsDB{release: release}
-	s := New(db, streamer.New(logger.New(), metrics.New()), logger.New())
+	s := New(db, streamer.New(logger.New(), metrics.New()), logger.New(), &config.Config{})
 
 	handlers := map[string]http.HandlerFunc{
 		"status.json": s.handleStatusJSON(),

internal/server/server.go

@@ -4,9 +4,10 @@ package server
 import (
 	"context"
 	"net/http"
-	"os"
+	"strconv"
 	"time"
 
+	"git.eeqj.de/sneak/routewatch/internal/config"
 	"git.eeqj.de/sneak/routewatch/internal/database"
 	"git.eeqj.de/sneak/routewatch/internal/logger"
 	"git.eeqj.de/sneak/routewatch/internal/streamer"
@@ -33,16 +34,18 @@ type Server struct {
 	db         database.Store
 	streamer   *streamer.Streamer
 	logger     *logger.Logger
+	port       int
 	srv        *http.Server
 	asnFetcher ASNFetcher
 }
 
 // New creates a new HTTP server
-func New(db database.Store, streamer *streamer.Streamer, logger *logger.Logger) *Server {
+func New(db database.Store, streamer *streamer.Streamer, logger *logger.Logger, cfg *config.Config) *Server {
 	s := &Server{
 		db:       db,
 		streamer: streamer,
 		logger:   logger,
+		port:     cfg.Port,
 	}
 
 	s.setupRoutes()
@@ -52,11 +55,6 @@ func New(db database.Store, streamer *streamer.Streamer, logger *logger.Logger)
 
 // Start starts the HTTP server
 func (s *Server) Start() error {
-	port := os.Getenv("PORT")
-	if port == "" {
-		port = "8080"
-	}
-
 	const (
 		readHeaderTimeout = 40 * time.Second
 		readTimeout       = 60 * time.Second
@@ -65,7 +63,7 @@ func (s *Server) Start() error {
 	)
 
 	s.srv = &http.Server{
-		Addr:              ":" + port,
+		Addr:              ":" + strconv.Itoa(s.port),
 		Handler:           s.router,
 		ReadHeaderTimeout: readHeaderTimeout,
 		ReadTimeout:       readTimeout,
@@ -73,7 +71,7 @@ func (s *Server) Start() error {
 		IdleTimeout:       idleTimeout,
 	}
 
-	s.logger.Info("Starting HTTP server", "port", port, "addr", s.srv.Addr)
+	s.logger.Info("Starting HTTP server", "port", s.port, "addr", s.srv.Addr)
 
 	// Start in goroutine but log when actually listening
 	go func() {

internal/streamer/streamer.go

@@ -210,9 +210,14 @@ func (s *Streamer) Start() error {
 // the connection status in metrics. This method is safe to call multiple times.
 func (s *Streamer) Stop() {
 	s.mu.Lock()
-	if s.cancel != nil {
+	if s.cancel == nil {
-		s.cancel()
+		// Not started, or already stopped: closing the queues again would panic.
+		s.mu.Unlock()
+
+		return
 	}
+	s.cancel()
+	s.cancel = nil
 	// Close all handler queues to signal workers to stop
 	for _, info := range s.handlers {
 		close(info.queue)
@@ -660,8 +665,15 @@ func (s *Streamer) stream(ctx context.Context) error {
 			continue
 		}
 
-		// Dispatch to interested handlers
+		// Dispatch to interested handlers. Stop cancels ctx and closes the
+		// queues under the write lock, so if ctx is cancelled here, under the
+		// read lock, the queues are closed and must not be sent to.
 		s.mu.RLock()
+		if ctx.Err() != nil {
+			s.mu.RUnlock()
+
+			return ctx.Err()
+		}
 		for _, info := range s.handlers {
 			if !info.handler.WantsMessage(msg.Type) {
 				continue

internal/streamer/streamer_test.go

@@ -2,6 +2,8 @@ package streamer
 
 import (
 	"context"
+	"errors"
+	"io"
 	"net/http"
 	"net/http/httptest"
 	"runtime"
@@ -10,6 +12,7 @@ import (
 
 	"git.eeqj.de/sneak/routewatch/internal/logger"
 	"git.eeqj.de/sneak/routewatch/internal/metrics"
+	"git.eeqj.de/sneak/routewatch/internal/ristypes"
 )
 
 func TestNewStreamer(t *testing.T) {
@@ -75,6 +78,45 @@ func TestStreamDoesNotLeakTickersAcrossReconnects(t *testing.T) {
 	}
 }
 
+// updateHandler wants UPDATE messages and does nothing with them.
+type updateHandler struct{}
+
+func (updateHandler) WantsMessage(messageType string) bool { return messageType == "UPDATE" }
+func (updateHandler) HandleMessage(*ristypes.RISMessage)   {}
+func (updateHandler) QueueCapacity() int                   { return 10 }
+
+// TestStopBeforeMessageReachesQueues stops the streamer after the read loop
+// has checked for cancellation but before it hands the message to the handler
+// queues. That is the gap a stop from another goroutine can land in, and it
+// used to end in "send on closed channel". The raw handler runs in that gap on
+// the read loop itself, so calling Stop from it hits the gap every time.
+func TestStopBeforeMessageReachesQueues(t *testing.T) {
+	const line = `{"type":"ris_message","data":{"type":"UPDATE","peer":"192.0.2.1",` +
+		`"peer_asn":"64496","timestamp":1700000000}}` + "\n"
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
+		_, _ = io.WriteString(w, line)
+	}))
+	defer srv.Close()
+
+	s := New(logger.New(), metrics.New())
+	s.url = srv.URL
+	s.RegisterHandler(updateHandler{})
+	s.RegisterRawHandler(func(string) { s.Stop() })
+
+	// Start would run the stream in the background, where the test cannot
+	// wait for it. Setting cancel as Start does lets Stop cancel the stream
+	// run here instead.
+	ctx, cancel := context.WithCancel(context.Background())
+	s.cancel = cancel
+
+	if err := s.stream(ctx); !errors.Is(err, context.Canceled) {
+		t.Fatalf("stream returned %v, want %v", err, context.Canceled)
+	}
+
+	// A second Stop must not close the queues again.
+	s.Stop()
+}
+
 // settledGoroutineCount lets transient goroutines finish, then reports the
 // current count.
 func settledGoroutineCount() int {

internal/version/version.go

@@ -7,7 +7,8 @@ package version
 var (
 	// GitRevision is the git commit hash
 	GitRevision = "unknown"
-	// GitRevisionShort is the short git commit hash (7 chars)
+	// GitRevisionShort is the version the page footer shows: the tag or
+	// short commit hash from `git describe --tags --always`
 	GitRevisionShort = "unknown"
 )
 

script/docker

@@ -1,7 +1,8 @@
 #!/bin/sh
 # script/docker: build the Docker image tagged with the project name.
 # Identical in all repos; the tag comes from script/projectname.
-# Generic: needs no adaptation.
+# --no-cache because the gate phases the final stage depends on are RUN
+# steps, and a cached one is a check that did not run.
 set -eu
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
@@ -9,7 +10,15 @@ ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    docker build -t "$("$SCRIPT_DIR/projectname")" .
+    # Own line: a failing command substitution inside an argument does
+    # not trip `set -e`, so the inline form degrades silently to an
+    # empty constant. The VERSION build argument takes precedence over
+    # the version a build stage derives from the .git in the context.
+    version="$(git describe --tags --always --dirty 2>/dev/null || true)"
+    [ -n "$version" ] || version="unknown"
+    docker build --no-cache \
+        --build-arg VERSION="$version" \
+        -t "$("$SCRIPT_DIR/projectname")" .
 }
 
 main "$@"