Display IP address along side server name in server list

binder/helpers.py

@@ -4,6 +4,7 @@ import dns.query
 import dns.reversename
 import dns.update
 import dns.tsig
+import socket
 import re
 
 def add_record(dns_server, zone_name, record_name, record_type, record_data, ttl, key_name, create_reverse=False):
@@ -106,3 +107,20 @@ def update_record(dns_server, zone_name, record_name, record_type, record_data,
     output = dns.query.tcp(dns_update, dns_server)
 
     return output
+
+def ip_info(host_name): # , family_dict, socket_dict):
+    """Create a dictionary mapping address types to their IP's.
+    If an error is encountered, key to error is "Error".
+    """
+    info = {}
+
+    try:
+        for s_family, s_type, s_proto, s_cannoname, s_sockaddr in socket.getaddrinfo(host_name.hostname, None):
+            if s_family == 2 and s_type == 1:
+                info["IPv4"] = s_sockaddr[0]
+            if s_family == 10 and s_type == 1:
+                info["IPv6"] = s_sockaddr[0]
+    except socket.gaierror, err:
+        info["Error"] = "Unable to resolve %s: %s" % (host_name, err)
+
+    return info

binder/templates/bcommon/list_servers.htm

@@ -7,9 +7,17 @@ Server List
 
 {% block body %}
 <table class="table">
-{% for current_server in server_list %}
   <tr>
-    <td><a href="/info/{{ current_server }}/"> {{ current_server }}</td>
+    <th>Hostname</th>
+    <th>IP Address</th>
+  </tr>
+{% for current_server in server_info %}
+  <tr>
+    <td><a href="/info/{{ current_server.host_name }}/"> {{ current_server.host_name }}</td>
+    <td>{% for key, value in current_server.ip_address.items %}
+      {{key}}: {{value}}<br>
+      {% endfor %}
+    </td>
   </tr>
 {% endfor %}
 </table>

binder/views.py

@@ -11,8 +11,12 @@ def home_index(request):
 def view_server_list(request):
     """ List the DNS servers configured in the database. """
     server_list = models.BindServer.objects.all().order_by("hostname")
+    server_info = []
+    for current in server_list:
+        server_info.append({"host_name" : current, "ip_address" : helpers.ip_info(current)})
+
     return render(request, "bcommon/list_servers.htm",
-                  { "server_list" : server_list})
+                  { "server_info" : server_info})
 
 def view_server_zones(request, dns_server):
     """ Display the list of DNS zones a particular DNS host provides. """