diff --git a/main.py b/main.py
index eb00682..b7a75f1 100755
--- a/main.py
+++ b/main.py
@@ -18,22 +18,35 @@ api_password = config.get('Re2o', 'password')
 api_username = config.get('Re2o', 'username')
 
 def regen_dhcp(api_client):
-    host_mac_ip = {}
+    """Genere les fichiers de zone du DHCP, par extension et par plage d'ip"""
+    host_mac_ip_ext = {}
+    host_mac_ip_type = {}
 
-    for hmi in api_client.list("dhcp/hostmacip/"):
-        if hmi['ip_type'] not in host_mac_ip.keys():
-            host_mac_ip[hmi['ip_type']] = []
-        host_mac_ip[hmi['ip_type']].append((hmi['hostname'],
-                                            hmi['extension'],
-                                            hmi['mac_address'],
-                                            hmi['ipv4']))
+    api_res = api_client.list("dhcp/hostmacip/")
+
+    build_hmi(host_mac_ip_ext, api_res, 'extension')
+    build_hmi(host_mac_ip_type, api_res, 'ip_type')
 
     template = ("host {hostname}{extension} {{\n"
                 "    hardware ethernet {mac_address};\n"
                 "    fixed-address {ipv4};\n"
                 "}}")
 
-    for ip_type, hmi_list in host_mac_ip.items():
+    generate_file(template, host_mac_ip_ext, "dhcp")
+    generate_file(template, host_mac_ip_type, "dhcp.ip_type.")
+
+def build_hmi(host_mac_ip, api_res, key):
+    for hmi in api_res:
+        if hmi[key] not in host_mac_ip.keys():
+            host_mac_ip[hmi[key]] = []
+        host_mac_ip[hmi[key]].append((hmi['hostname'],
+                                      hmi['extension'],
+                                      hmi['mac_address'],
+                                      hmi['ipv4']))
+
+
+def generate_file(template, host_mac_ip, file_prefix):
+     for key, hmi_list in host_mac_ip.items():
         dhcp_leases_content = '\n\n'.join(template.format(
                 hostname=hostname,
                 extension=extension,
@@ -41,10 +54,13 @@ def regen_dhcp(api_client):
                 ipv4=ipv4
             ) for hostname, extension, mac_address, ipv4 in hmi_list)
 
-        filename = path+'/generated/dhcp.{ip_type}.list'.format(ip_type=ip_type)
+        filename = path+'/generated/{file_prefix}{key}.list'.format(
+                key=key,
+                file_prefix=file_prefix)
         with open(filename, 'w+') as f:
             f.write(dhcp_leases_content)
 
+
 def reload_server():
     """Relance le serveur DHCP."""
     try: