Avoid reverse DNS delays in CI TLS fixture

tools/tls_fixture.py

@@ -6,6 +6,7 @@ import ipaddress
 import json
 import pathlib
 import socket
+import socketserver
 import ssl
 import struct
 import subprocess
@@ -36,6 +37,8 @@ state = json.loads((root / "MusicBridgeTests/state-v1.json").read_text())
 
 
 class Handler(http.server.BaseHTTPRequestHandler):
+    protocol_version = "HTTP/1.1"
+
     def do_GET(self):
         if self.path == "/v1/events":
             accept = base64.b64encode(hashlib.sha1(
@@ -58,17 +61,25 @@ class Handler(http.server.BaseHTTPRequestHandler):
 
 
 fixtures = {}
+class Server(http.server.ThreadingHTTPServer):
+    def server_bind(self):
+        # HTTPServer's reverse DNS lookup can stall on hosted runner addresses.
+        socketserver.TCPServer.server_bind(self)
+        self.server_name, self.server_port = self.server_address
+
+
 for name, days in (("valid", "1825"), ("expired", "-1")):
+    print(f"Generating {name} certificate for {address}", flush=True)
     key, csr, cert = (work / (name + suffix) for suffix in (".key", ".csr", ".pem"))
     subprocess.run(["openssl", "req", "-new", "-newkey", "rsa:2048", "-nodes", "-config", str(config),
-                    "-keyout", str(key), "-out", str(csr)], check=True, capture_output=True)
+                    "-keyout", str(key), "-out", str(csr)], check=True, capture_output=True, timeout=15)
     subprocess.run(["openssl", "x509", "-req", "-in", str(csr), "-signkey", str(key), "-sha256",
                     "-days", days, "-extfile", str(config), "-extensions", "ext", "-out", str(cert)],
-                   check=True, capture_output=True)
+                   check=True, capture_output=True, timeout=15)
     context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
     context.minimum_version = ssl.TLSVersion.TLSv1_2
     context.load_cert_chain(cert, key)
-    server = http.server.ThreadingHTTPServer((address, 0), Handler)
+    server = Server((address, 0), Handler)
     server.socket = context.wrap_socket(server.socket, server_side=True)
     threading.Thread(target=server.serve_forever, daemon=True).start()
     fixtures[name] = {"endpoint": f"https://{address}:{server.server_port}",