Record P2P selected candidate paths

2026-07-17 10:06:00 +00:00 · 2026-07-08 10:03:11 +00:00
parent 39065e15e3
commit b1955703b9
4 changed files with 293 additions and 111 deletions
@@ -4,12 +4,21 @@ import type { ServiceContext } from "@lib/services/base/ServiceBase";
 import { LiveSyncTrysteroReplicator } from "@lib/replication/trystero/LiveSyncTrysteroReplicator";
 import { compatGlobal } from "@lib/common/coreEnvFunctions.ts";
 import { LiveSyncError } from "@lib/common/LSError";
+import { getPeerConnectionStats } from "@lib/rpc/transports/DiagRTCPeerConnections.utils";
+import { appendFile } from "node:fs/promises";

 type CLIP2PPeer = {
    peerId: string;
    name: string;
 };

+type CandidateSummary = {
+    id: string | "unknown";
+    candidateType: string | "unknown";
+    protocol: string | "unknown";
+    relayProtocol: string | "unknown";
+};
+
 function delay(ms: number): Promise<void> {
    return new Promise((resolve) => compatGlobal.setTimeout(resolve, ms));
 }
@@ -81,6 +90,74 @@ function resolvePeer(peers: CLIP2PPeer[], peerToken: string): CLIP2PPeer | undef
    return undefined;
 }

+function getReportValue<T extends string | number>(
+    report: Record<string, unknown> | undefined,
+    key: string
+): T | "unknown" {
+    const value = report?.[key];
+    return typeof value === "string" || typeof value === "number" ? (value as T) : "unknown";
+}
+
+function summariseCandidate(reports: unknown[], candidateId: string | "unknown"): CandidateSummary | undefined {
+    if (candidateId === "unknown") {
+        return undefined;
+    }
+    const report = reports.map((r) => r as Record<string, unknown>).find((r) => r.id === candidateId);
+    if (!report) {
+        return undefined;
+    }
+    return {
+        id: candidateId,
+        candidateType: getReportValue<string>(report, "candidateType"),
+        protocol: getReportValue<string>(report, "protocol"),
+        relayProtocol: getReportValue<string>(report, "relayProtocol"),
+    };
+}
+
+async function writePeerConnectionStatsIfRequested(
+    replicator: LiveSyncTrysteroReplicator,
+    peer: CLIP2PPeer
+): Promise<void> {
+    const outputPath = process.env.LIVESYNC_P2P_STATS_JSONL?.trim();
+    if (!outputPath) {
+        return;
+    }
+
+    const peerConnection = replicator.rawHost?.room?.getPeers()[peer.peerId];
+    const stats = peerConnection ? await getPeerConnectionStats(`cli-p2p-${peer.peerId}`, peerConnection) : undefined;
+    const localCandidate = summariseCandidate(stats?.reports ?? [], stats?.localCandidateId ?? "unknown");
+    const remoteCandidate = summariseCandidate(stats?.reports ?? [], stats?.remoteCandidateId ?? "unknown");
+    const selectedPath =
+        localCandidate && remoteCandidate
+            ? `${localCandidate.candidateType}<->${remoteCandidate.candidateType}`
+            : "unknown";
+
+    const payload = {
+        generatedAt: new Date().toISOString(),
+        command: "p2p-sync",
+        peerId: peer.peerId,
+        peerName: peer.name,
+        candidatePathCollected: !!stats?.selectedPair,
+        selectedPath,
+        selectedPair: stats
+            ? {
+                  id: stats.selectedPairId,
+                  state: stats.state,
+                  currentRoundTripTime: stats.currentRoundTripTime,
+                  totalRoundTripTime: stats.totalRoundTripTime,
+                  requestsSent: stats.requestsSent,
+                  responsesReceived: stats.responsesReceived,
+                  packetsDiscardedOnSend: stats.packetsDiscardedOnSend,
+                  bytesSent: stats.bytesSent,
+                  bytesReceived: stats.bytesReceived,
+              }
+            : undefined,
+        localCandidate,
+        remoteCandidate,
+    };
+    await appendFile(outputPath, `${JSON.stringify(payload)}\n`, "utf8");
+}
+
 export async function syncWithPeer(
    core: LiveSyncBaseCore<ServiceContext, never>,
    peerToken: string,
@@ -118,6 +195,7 @@ export async function syncWithPeer(
                : LiveSyncError.fromError(err ?? "P2P sync failed while requesting remote sync");
        }

+        await writePeerConnectionStatsIfRequested(replicator, targetPeer);
        return targetPeer;
    } finally {
        await replicator.close();
@@ -65,6 +65,10 @@ function buildCases(): BenchmarkCase[] {
                ...base,
                BENCH_CASE: "p2p-direct-local",
                BENCH_TURN_SERVERS: "",
+                BENCH_SIMULATION_TIER: "1",
+                BENCH_NETWORK_PROFILE: "local-direct",
+                BENCH_NETWORK_MODEL: "local-runner-webrtc",
+                BENCH_P2P_CANDIDATE_PATH_VERIFICATION: "turn-disabled-but-selected-ice-pair-not-collected",
            },
        },
        {
@@ -125,6 +129,11 @@ function buildCases(): BenchmarkCase[] {
                ...base,
                BENCH_CASE: "p2p-smartphone-vpn-direct",
                BENCH_TURN_SERVERS: "",
+                BENCH_SIMULATION_TIER: "unmeasured",
+                BENCH_NETWORK_PROFILE: "smartphone-vpn-direct-placeholder",
+                BENCH_NETWORK_MODEL: "local-runner-no-netem",
+                BENCH_P2P_CANDIDATE_PATH_VERIFICATION:
+                    "structural-placeholder-only; selected ICE pair may be collected, but the path is not shaped",
            },
        },
        {
@@ -137,6 +146,11 @@ function buildCases(): BenchmarkCase[] {
                ...base,
                BENCH_CASE: "p2p-user-turn",
                BENCH_TURN_SERVERS: localTurnServers,
+                BENCH_SIMULATION_TIER: "1",
+                BENCH_NETWORK_PROFILE: "local-turn-fallback",
+                BENCH_NETWORK_MODEL: "local-runner-webrtc-turn-configured",
+                BENCH_P2P_CANDIDATE_PATH_VERIFICATION:
+                    "turn-configured; selected ICE pair may still be direct or relayed, so interpret the recorded candidate types",
            },
        },
    ];
@@ -27,6 +27,42 @@ type BenchmarkConfig = {
    binSizeBytes: number;
    peersTimeoutSeconds: number;
    syncTimeoutSeconds: number;
+    simulationTier: string;
+    networkProfile: string;
+    networkModel: string;
+    candidatePathVerification: string;
+};
+
+type P2PConnectionStats = {
+    generatedAt: string;
+    command: string;
+    peerId: string;
+    peerName: string;
+    candidatePathCollected: boolean;
+    selectedPath: string;
+    selectedPair?: {
+        id: string;
+        state: string;
+        currentRoundTripTime: number | "unknown";
+        totalRoundTripTime: number | "unknown";
+        requestsSent: number | "unknown";
+        responsesReceived: number | "unknown";
+        packetsDiscardedOnSend: number | "unknown";
+        bytesSent: number | "unknown";
+        bytesReceived: number | "unknown";
+    };
+    localCandidate?: {
+        id: string;
+        candidateType: string;
+        protocol: string;
+        relayProtocol: string;
+    };
+    remoteCandidate?: {
+        id: string;
+        candidateType: string;
+        protocol: string;
+        relayProtocol: string;
+    };
 };

 function readEnvString(name: string, fallback: string): string {
@@ -84,6 +120,10 @@ function buildConfig(): BenchmarkConfig {
        binSizeBytes: Math.floor(readEnvNumber("BENCH_BIN_SIZE_BYTES", 100 * 1024)),
        peersTimeoutSeconds: readEnvNumber("BENCH_PEERS_TIMEOUT", 20),
        syncTimeoutSeconds: readEnvNumber("BENCH_SYNC_TIMEOUT", 240),
+        simulationTier: readEnvString("BENCH_SIMULATION_TIER", "1"),
+        networkProfile: readEnvString("BENCH_NETWORK_PROFILE", "local-direct"),
+        networkModel: readEnvString("BENCH_NETWORK_MODEL", "local-runner-webrtc"),
+        candidatePathVerification: readEnvString("BENCH_P2P_CANDIDATE_PATH_VERIFICATION", "not-collected"),
    };
 }

@@ -112,6 +152,22 @@ function pickSampleFiles(entries: DatasetEntry[]): DatasetEntry[] {
    return [...unique.values()];
 }

+async function readLatestP2PConnectionStats(statsPath: string): Promise<P2PConnectionStats | undefined> {
+    try {
+        const text = await Deno.readTextFile(statsPath);
+        const lines = text
+            .split(/\r?\n/)
+            .map((line) => line.trim())
+            .filter((line) => line.length > 0);
+        if (lines.length === 0) {
+            return undefined;
+        }
+        return JSON.parse(lines[lines.length - 1]) as P2PConnectionStats;
+    } catch {
+        return undefined;
+    }
+}
+
 async function main(): Promise<void> {
    const config = buildConfig();
    const resultPath = readOptionalResultPath();
@@ -124,126 +180,153 @@ async function main(): Promise<void> {
    const clientVault = workDir.join("vault-client");
    const hostSettings = workDir.join("settings-host.json");
    const clientSettings = workDir.join("settings-client.json");
+    const p2pStatsPath = workDir.join("p2p-connection-stats.jsonl");
+    const previousStatsPath = Deno.env.get("LIVESYNC_P2P_STATS_JSONL");
+    Deno.env.set("LIVESYNC_P2P_STATS_JSONL", p2pStatsPath);

-    await Promise.all([
-        Deno.mkdir(hostVault, { recursive: true }),
-        Deno.mkdir(clientVault, { recursive: true }),
-        initSettingsFile(hostSettings),
-        initSettingsFile(clientSettings),
-    ]);
-
-    await Promise.all([
-        applyP2pSettings(
-            hostSettings,
-            config.roomId,
-            config.passphrase,
-            config.appId,
-            config.relay,
-            "~.*",
-            config.turnServers
-        ),
-        applyP2pSettings(
-            clientSettings,
-            config.roomId,
-            config.passphrase,
-            config.appId,
-            config.relay,
-            "~.*",
-            config.turnServers
-        ),
-    ]);
-
-    await Promise.all([
-        applyP2pTestTweaks(hostSettings, "p2p-bench-host", config.passphrase),
-        applyP2pTestTweaks(clientSettings, "p2p-bench-client", config.passphrase),
-    ]);
-
-    const seedFiles = await createDeterministicDataset({
-        rootDir: hostVault,
-        datasetDirName: config.datasetDirName,
-        seed: config.datasetSeed,
-        mdCount: config.mdFileCount,
-        mdMinSizeBytes: config.mdMinSizeBytes,
-        mdMaxSizeBytes: config.mdMaxSizeBytes,
-        binCount: config.binFileCount,
-        binSizeBytes: config.binSizeBytes,
-    });
-
-    const mirrorStart = nowMs();
-    await runCliOrFail(hostVault, "--settings", hostSettings, "mirror");
-    const mirrorElapsed = nowMs() - mirrorStart;
-
-    const host = startCliInBackground(hostVault, "--settings", hostSettings, "p2p-host");
    try {
-        const hostReadyStart = nowMs();
-        await host.waitUntilContains("P2P host is running", 20000);
-        const hostReadyElapsed = nowMs() - hostReadyStart;
+        await Promise.all([
+            Deno.mkdir(hostVault, { recursive: true }),
+            Deno.mkdir(clientVault, { recursive: true }),
+            initSettingsFile(hostSettings),
+            initSettingsFile(clientSettings),
+        ]);

-        const peerDiscoveryCommandStart = nowMs();
-        const peer = await discoverPeer(clientVault, clientSettings, config.peersTimeoutSeconds);
-        const peerDiscoveryCommandElapsed = nowMs() - peerDiscoveryCommandStart;
+        await Promise.all([
+            applyP2pSettings(
+                hostSettings,
+                config.roomId,
+                config.passphrase,
+                config.appId,
+                config.relay,
+                "~.*",
+                config.turnServers
+            ),
+            applyP2pSettings(
+                clientSettings,
+                config.roomId,
+                config.passphrase,
+                config.appId,
+                config.relay,
+                "~.*",
+                config.turnServers
+            ),
+        ]);

-        const syncStart = nowMs();
-        await runCliOrFail(
-            clientVault,
-            "--settings",
-            clientSettings,
-            "p2p-sync",
-            peer.id,
-            String(config.syncTimeoutSeconds)
-        );
-        const syncElapsed = nowMs() - syncStart;
+        await Promise.all([
+            applyP2pTestTweaks(hostSettings, "p2p-bench-host", config.passphrase),
+            applyP2pTestTweaks(clientSettings, "p2p-bench-client", config.passphrase),
+        ]);

-        const sampleFiles = pickSampleFiles(seedFiles.entries);
-        for (const sample of sampleFiles) {
-            const pulledPath = workDir.join(`pulled-${sample.relativePath.replaceAll("/", "_")}`);
-            await runCliOrFail(clientVault, "--settings", clientSettings, "pull", sample.relativePath, pulledPath);
-            await assertFilesEqual(
-                sample.absolutePath,
-                pulledPath,
-                `sample file mismatch after sync: ${sample.relativePath}`
-            );
-        }
-
-        const result = {
-            caseName: config.caseName,
-            mode: "p2p-cli-benchmark",
-            relay: config.relay,
-            turnServers: config.turnServers,
-            turnEnabled: config.turnServers.trim().length > 0,
-            appId: config.appId,
-            roomId: config.roomId,
-            datasetSeed: config.datasetSeed,
+        const seedFiles = await createDeterministicDataset({
+            rootDir: hostVault,
            datasetDirName: config.datasetDirName,
-            peerId: peer.id,
-            peerName: peer.name,
-            totalFiles: seedFiles.totalFiles,
-            totalBytes: seedFiles.totalBytes,
-            mdFileCount: seedFiles.mdCount,
-            binFileCount: seedFiles.binCount,
-            mirrorElapsedMs: Number(mirrorElapsed.toFixed(1)),
-            hostReadyElapsedMs: Number(hostReadyElapsed.toFixed(1)),
-            peerDiscoveryTimeoutSeconds: config.peersTimeoutSeconds,
-            peerDiscoveryCommandElapsedMs: Number(peerDiscoveryCommandElapsed.toFixed(1)),
-            peerDiscoveryNote:
-                "p2p-peers waits for the requested timeout before printing discovered peers, so this is command duration, not first-peer latency.",
-            syncElapsedMs: Number(syncElapsed.toFixed(1)),
-            throughputBytesPerSec: Number((seedFiles.totalBytes / (syncElapsed / 1000)).toFixed(2)),
-            throughputMiBPerSec: Number((seedFiles.totalBytes / (syncElapsed / 1000) / 1024 / 1024).toFixed(4)),
-        };
+            seed: config.datasetSeed,
+            mdCount: config.mdFileCount,
+            mdMinSizeBytes: config.mdMinSizeBytes,
+            mdMaxSizeBytes: config.mdMaxSizeBytes,
+            binCount: config.binFileCount,
+            binSizeBytes: config.binSizeBytes,
+        });

-        if (resultPath) {
-            await Deno.writeTextFile(resultPath, JSON.stringify(result, null, 2));
+        const mirrorStart = nowMs();
+        await runCliOrFail(hostVault, "--settings", hostSettings, "mirror");
+        const mirrorElapsed = nowMs() - mirrorStart;
+
+        const host = startCliInBackground(hostVault, "--settings", hostSettings, "p2p-host");
+        try {
+            const hostReadyStart = nowMs();
+            await host.waitUntilContains("P2P host is running", 20000);
+            const hostReadyElapsed = nowMs() - hostReadyStart;
+
+            const peerDiscoveryCommandStart = nowMs();
+            const peer = await discoverPeer(clientVault, clientSettings, config.peersTimeoutSeconds);
+            const peerDiscoveryCommandElapsed = nowMs() - peerDiscoveryCommandStart;
+
+            const syncStart = nowMs();
+            await runCliOrFail(
+                clientVault,
+                "--settings",
+                clientSettings,
+                "p2p-sync",
+                peer.id,
+                String(config.syncTimeoutSeconds)
+            );
+            const syncElapsed = nowMs() - syncStart;
+
+            const sampleFiles = pickSampleFiles(seedFiles.entries);
+            for (const sample of sampleFiles) {
+                const pulledPath = workDir.join(`pulled-${sample.relativePath.replaceAll("/", "_")}`);
+                await runCliOrFail(clientVault, "--settings", clientSettings, "pull", sample.relativePath, pulledPath);
+                await assertFilesEqual(
+                    sample.absolutePath,
+                    pulledPath,
+                    `sample file mismatch after sync: ${sample.relativePath}`
+                );
+            }
+
+            const p2pConnectionStats = await readLatestP2PConnectionStats(p2pStatsPath);
+            const result = {
+                caseName: config.caseName,
+                mode: "p2p-cli-benchmark",
+                relay: config.relay,
+                turnServers: config.turnServers,
+                turnEnabled: config.turnServers.trim().length > 0,
+                simulationTier: config.simulationTier,
+                networkProfile: config.networkProfile,
+                networkModel: config.networkModel,
+                p2pCandidatePathVerified: p2pConnectionStats?.candidatePathCollected === true,
+                p2pCandidatePathVerification: p2pConnectionStats?.candidatePathCollected
+                    ? "selected ICE candidate pair collected from RTCPeerConnection.getStats"
+                    : config.candidatePathVerification,
+                p2pCandidatePathNote: p2pConnectionStats?.candidatePathCollected
+                    ? "The selected ICE candidate pair was collected by the CLI benchmark. Interpret the path from the candidate types; do not infer TURN use from configuration alone."
+                    : config.turnServers.trim().length > 0
+                      ? "TURN is configured, so the selected WebRTC path may be direct, server-reflexive, or relayed. The selected ICE candidate pair was not exported by this run."
+                      : "TURN is disabled, so a TURN-relayed path is not expected. The selected ICE candidate pair was not exported by this run.",
+                p2pConnectionStats,
+                appId: config.appId,
+                roomId: config.roomId,
+                datasetSeed: config.datasetSeed,
+                datasetDirName: config.datasetDirName,
+                peerId: peer.id,
+                peerName: peer.name,
+                totalFiles: seedFiles.totalFiles,
+                totalBytes: seedFiles.totalBytes,
+                mdFileCount: seedFiles.mdCount,
+                binFileCount: seedFiles.binCount,
+                mirrorElapsedMs: Number(mirrorElapsed.toFixed(1)),
+                hostReadyElapsedMs: Number(hostReadyElapsed.toFixed(1)),
+                peerDiscoveryTimeoutSeconds: config.peersTimeoutSeconds,
+                peerDiscoveryCommandElapsedMs: Number(peerDiscoveryCommandElapsed.toFixed(1)),
+                peerDiscoveryNote:
+                    "p2p-peers waits for the requested timeout before printing discovered peers, so this is command duration, not first-peer latency.",
+                syncElapsedMs: Number(syncElapsed.toFixed(1)),
+                throughputBytesPerSec: Number((seedFiles.totalBytes / (syncElapsed / 1000)).toFixed(2)),
+                throughputMiBPerSec: Number((seedFiles.totalBytes / (syncElapsed / 1000) / 1024 / 1024).toFixed(4)),
+            };
+
+            if (resultPath) {
+                await Deno.writeTextFile(resultPath, JSON.stringify(result, null, 2));
+            }
+
+            console.log(JSON.stringify(result, null, 2));
+            console.error(
+                `[Benchmark] mirrored ${seedFiles.totalFiles} files (${formatBytes(
+                    seedFiles.totalBytes
+                )}) in ${formatMs(mirrorElapsed)}, ` +
+                    `synced in ${formatMs(syncElapsed)} ` +
+                    `(${result.throughputBytesPerSec} B/s, ${result.throughputMiBPerSec} MiB/s)`
+            );
+        } finally {
+            await host.stop();
        }
-
-        console.log(JSON.stringify(result, null, 2));
-        console.error(
-            `[Benchmark] mirrored ${seedFiles.totalFiles} files (${formatBytes(seedFiles.totalBytes)}) in ${formatMs(mirrorElapsed)}, ` +
-                `synced in ${formatMs(syncElapsed)} ` +
-                `(${result.throughputBytesPerSec} B/s, ${result.throughputMiBPerSec} MiB/s)`
-        );
    } finally {
-        await host.stop();
+        if (previousStatsPath === undefined) {
+            Deno.env.delete("LIVESYNC_P2P_STATS_JSONL");
+        } else {
+            Deno.env.set("LIVESYNC_P2P_STATS_JSONL", previousStatsPath);
+        }
        await stopCoturnIfStarted(coturnStarted);
        await stopLocalRelayIfStarted(relayStarted);
    }