Fix reverse zone creation in ipa-replica-prepare

When a new reverse zone was created in ipa-replica-prepare (this
may happen when a new replica is from different subnet), the master
DNS address was corrupted by invalid A/AAAA record. This caused
problems for example in installing replica.

https://fedorahosted.org/freeipa/ticket/1223

1 files changed, 15 insertions, 0 deletions

diff --git a/ipaserver/install/installutils.py b/ipaserver/install/installutils.py
index 3868c4d04..554e9b1cb 100644
--- a/ipaserver/install/installutils.py
+++ b/ipaserver/install/installutils.py
@@ -33,6 +33,9 @@ import time
 from ipapython import ipautil
 from ipapython import dnsclient
 
+class HostnameLocalhost(Exception):
+    pass
+
 def get_fqdn():
     fqdn = ""
     try:
@@ -421,3 +424,15 @@ def wait_for_open_ports(host, ports, timeout=0):
                 else:
                     raise e
 
+def resolve_host(host_name):
+    try:
+        addrinfos = socket.getaddrinfo(host_name, None,
+                                       socket.AF_UNSPEC, socket.SOCK_STREAM)
+        for ai in addrinfos:
+            ip = ai[4][0]
+            if ip == "127.0.0.1" or ip == "::1":
+                raise HostnameLocalhost("The hostname resolves to the localhost address")
+
+        return addrinfos[0][4][0]
+    except:
+        return None