chore: import upstream snapshot with attribution

python/ray/_common/network_utils.py

@@ -0,0 +1,27 @@
+import socket
+from contextlib import closing
+
+from ray._raylet import (  # noqa: F401
+    build_address,
+    get_all_interfaces_ip,
+    get_localhost_ip,
+    is_ipv6,
+    is_localhost,
+    node_ip_address_from_perspective,
+    parse_address,
+)
+
+
+def find_free_port(family: socket.AddressFamily = socket.AF_INET) -> int:
+    """Find a free port on the local machine.
+
+    Args:
+        family: The socket address family (AF_INET for IPv4, AF_INET6 for IPv6).
+            Defaults to AF_INET.
+
+    Returns:
+        An available port number.
+    """
+    with closing(socket.socket(family, socket.SOCK_STREAM)) as s:
+        s.bind(("", 0))
+        return s.getsockname()[1]