relay preparing for public internet

tests/test_gossip_and_relay.py

@@ -451,6 +451,8 @@ def test_tracker_derives_relay_url_from_public_self_url():
         with urllib.request.urlopen(f"http://127.0.0.1:{port}/v1/network/map", timeout=5) as resp:
             body = _json.loads(resp.read())
         assert body["relay_url"] == "wss://ai.neuron.d-popov.com/ws"
+        assert body["relay"]["mode"] == "external"
+        assert body["relay"]["url"] == "wss://ai.neuron.d-popov.com/ws"
     finally:
         tracker.stop()
 
@@ -501,10 +503,46 @@ def test_tracker_network_map_exposes_relay_and_registered_peer():
         tracker.stop()
 
     assert body["relay_url"] == "wss://ai.neuron.d-popov.com/ws"
+    assert body["relay"]["mode"] == "external"
     assert body["nodes"][0]["relay_addr"] == "wss://ai.neuron.d-popov.com/rpc/peer123"
     assert body["nodes"][0]["peer_id"] == "peer123"
 
 
+def test_tracker_can_embed_relay_server_and_advertise_it():
+    import json as _json
+    import urllib.request
+
+    import websockets.sync.client as wsc  # type: ignore[import]
+    from meshnet_tracker.server import TrackerServer
+
+    tracker = TrackerServer(
+        host="127.0.0.1",
+        port=0,
+        embedded_relay=True,
+        embedded_relay_host="127.0.0.1",
+        embedded_relay_port=0,
+    )
+    port = tracker.start()
+    try:
+        with urllib.request.urlopen(f"http://127.0.0.1:{port}/v1/network/map", timeout=5) as resp:
+            body = _json.loads(resp.read())
+        assert body["relay"]["mode"] == "embedded"
+        assert body["relay_url"].startswith("ws://127.0.0.1:")
+        assert body["relay_url"].endswith("/ws")
+        with wsc.connect(body["relay_url"], open_timeout=5) as ws:
+            ws.send(_json.dumps({
+                "topic": "peer-register",
+                "version": 1,
+                "from_peer": "embedded-peer",
+                "msg_id": "embedded-reg-1",
+                "payload": {"peer_id": "embedded-peer", "addr": ""},
+            }))
+            peer_list = _json.loads(ws.recv(timeout=5))
+        assert peer_list["topic"] == "peer-list"
+    finally:
+        tracker.stop()
+
+
 # ---------------------------------------------------------------------------
 # mDNS (no-op without zeroconf installed)
 # ---------------------------------------------------------------------------