--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/planemo/lib/python3.7/site-packages/galaxy/util/sockets.py	Fri Jul 31 00:32:28 2020 -0400
@@ -0,0 +1,56 @@
+import random
+import socket
+
+from galaxy.util import commands
+
+
+def get_ip():
+    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+    try:
+        # doesn't even have to be reachable
+        s.connect(('10.255.255.255', 1))
+        ip = s.getsockname()[0]
+    except Exception:
+        ip = None
+    finally:
+        s.close()
+    return ip
+
+
+def unused_port(range=None):
+    if range:
+        return __unused_port_on_range(range)
+    else:
+        return __unused_port_rangeless()
+
+
+def __unused_port_rangeless():
+    # TODO: Allow ranges (though then need to guess and check)...
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.bind(('localhost', 0))
+    addr, port = s.getsockname()
+    s.close()
+    return port
+
+
+def __unused_port_on_range(range):
+    assert range[0] and range[1]
+
+    # Find all ports that are already occupied
+    cmd_netstat = ["netstat", "tuln"]
+    stdout = commands.execute(cmd_netstat)
+
+    occupied_ports = set()
+    for line in stdout.split('\n'):
+        if line.startswith('tcp') or line.startswith('tcp6'):
+            col = line.split()
+            local_address = col[3]
+            local_port = local_address.split(':')[1]
+            occupied_ports.add(int(local_port))
+
+    # Generate random free port number.
+    while True:
+        port = random.randrange(range[0], range[1])
+        if port not in occupied_ports:
+            break
+    return port