From 1cff0fb32018a637080b3be5067510742a4d0a5b Mon Sep 17 00:00:00 2001
From: Mark Reynolds <mreynolds@redhat.com>
Date: May 01 2020 13:54:23 +0000
Subject: Issue 51064 - Unable to install server where IPv6 is disabled


Description:  When checking if a port is available, first attempt to
              create a socket using AF_INET6, if that fails then use
              AF_INET

relates: https://pagure.io/389-ds-base/issue/51064

Reviewed by: firstyear(Thanks!)

---

diff --git a/src/lib389/lib389/utils.py b/src/lib389/lib389/utils.py
index 6afbfe6..9a9260b 100644
--- a/src/lib389/lib389/utils.py
+++ b/src/lib389/lib389/utils.py
@@ -1143,11 +1143,28 @@ def getDateTime():
 
 
 def socket_check_open(host, port):
-    with closing(socket.socket(socket.AF_INET6, socket.SOCK_STREAM)) as sock:
-        if sock.connect_ex((host, port)) == 0:
-            return True
-        else:
-            return False
+    """
+    Check if a socket can be opened.  Need to handle cases where IPv6 is completely
+    disabled.
+    """
+    try:
+        # Trying IPv6 first ...
+        family = socket.AF_INET6
+        with closing(socket.socket(family, socket.SOCK_STREAM)) as sock:
+            if sock.connect_ex((host, port)) == 0:
+                return True
+            else:
+                return False
+    except OSError:
+        # No IPv6, adjust hostname, and try IPv4 ...
+        family = socket.AF_INET
+        if host == "::1":
+            host = "127.0.0.1"
+        with closing(socket.socket(family, socket.SOCK_STREAM)) as sock:
+            if sock.connect_ex((host, port)) == 0:
+                return True
+            else:
+                return False
 
 
 def ensure_bytes(val):