1 files changed, 56 insertions, 0 deletions
diff --git a/tests/functional/qemu_test/ports.py b/tests/functional/qemu_test/ports.py
new file mode 100644
index 0000000000..cc39939d48
--- /dev/null
+++ b/tests/functional/qemu_test/ports.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+#
+# Simple functional tests for VNC functionality
+#
+# Copyright 2018, 2024 Red Hat, Inc.
+#
+# This work is licensed under the terms of the GNU GPL, version 2 or
+# later.  See the COPYING file in the top-level directory.
+
+import fcntl
+import os
+import socket
+import sys
+import tempfile
+
+from .config import BUILD_DIR
+from typing import List
+
+class Ports():
+
+    PORTS_ADDR = '127.0.0.1'
+    PORTS_RANGE_SIZE = 1024
+    PORTS_START = 49152 + ((os.getpid() * PORTS_RANGE_SIZE) % 16384)
+    PORTS_END = PORTS_START + PORTS_RANGE_SIZE
+
+    def __enter__(self):
+        lock_file = os.path.join(BUILD_DIR, "tests", "functional", "port_lock")
+        self.lock_fh = os.open(lock_file, os.O_CREAT)
+        fcntl.flock(self.lock_fh, fcntl.LOCK_EX)
+        return self
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        fcntl.flock(self.lock_fh, fcntl.LOCK_UN)
+        os.close(self.lock_fh)
+
+    def check_bind(self, port: int) -> bool:
+        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
+            try:
+                sock.bind((self.PORTS_ADDR, port))
+            except OSError:
+                return False
+
+        return True
+
+    def find_free_ports(self, count: int) -> List[int]:
+        result = []
+        for port in range(self.PORTS_START, self.PORTS_END):
+            if self.check_bind(port):
+                result.append(port)
+                if len(result) >= count:
+                    break
+        assert len(result) == count
+        return result
+
+    def find_free_port(self) -> int:
+        return self.find_free_ports(1)[0]