diff --git a/data/build_c_array.py b/data/build_c_array.py
index 5b5906e..ef6555a 100755
--- a/data/build_c_array.py
+++ b/data/build_c_array.py
@@ -2,6 +2,7 @@
 #-*- coding: utf-8
 
 import sys
+from functools import cmp_to_key
 
 COUNTRY_CODE_INDEX=1
 IP_TYPE_INDEX=2
@@ -75,15 +76,15 @@ class IP_ELEMENT(object):
         self._level = level
 
     def printme(self):
-        print 'static const ip_level %s = {' % (self.name())
-        print '\t.prev = %s,' % (self._prev and '&%s' % (self._prev.name()) or 'NULL')
-        print '\t.next = %s,' % (self._next and '&%s' % (self._next.name()) or 'NULL')
-        print '\t.childs = %s,' % (self._childs and '&%s' % (self._childs.name()) or 'NULL')
-        print '\t.start = %d,' % (self._splitted_start[self._level])
-        print '\t.end = %d,' % (self._splitted_end[self._level])
-        print '\t.average = %d,' % (self._average)
-        print '\t.code = %d,' % (self._country_code and self._country_code or 0)
-        print '};'
+        print('static const ip_level %s = {' % (self.name()))
+        print('\t.prev = %s,' % (self._prev and '&%s' % (self._prev.name()) or 'NULL'))
+        print('\t.next = %s,' % (self._next and '&%s' % (self._next.name()) or 'NULL'))
+        print('\t.childs = %s,' % (self._childs and '&%s' % (self._childs.name()) or 'NULL'))
+        print('\t.start = %d,' % (self._splitted_start[self._level]))
+        print('\t.end = %d,' % (self._splitted_end[self._level]))
+        print('\t.average = %d,' % (self._average))
+        print('\t.code = %d,' % (self._country_code and self._country_code or 0))
+        print('};')
 
     def get_ip_len(self):
         raise NotImplementedError()
@@ -178,8 +179,8 @@ while True:
     else:
         sys.stderr.write('Unknown IP type %s\n' % (information[IP_TYPE_INDEX]))
 
-print '/* This file was automatically generated, do not edit it ! */'
-print '#include <stdint.h>\n\n'
+print('/* This file was automatically generated, do not edit it ! */')
+print('#include <stdint.h>\n\n')
 
 def ip_sort(a, b):
     for i in range(0, a.get_ip_len()):
@@ -257,16 +258,16 @@ def print_ip(ip):
     while cur_ip:
         if cur_ip._childs:
             print_ip(cur_ip._childs)
-        print 'static const ip_level %s;' % (cur_ip.name())
+        print('static const ip_level %s;' % (cur_ip.name()))
         cur_ip = cur_ip._next
-    print ''
+    print('')
     cur_ip = ip
     while cur_ip:
         cur_ip.printme()
         cur_ip = cur_ip._next
 
 def build_array(ip_list, array_name, max_depth):
-    ip_list.sort(ip_sort)
+    ip_list = sorted(ip_list, key=cmp_to_key(ip_sort))
     start_idx = 0
     end_idx = start_idx+1
     cur_interval = [ip_list[start_idx]]
@@ -288,18 +289,18 @@ def build_array(ip_list, array_name, max_depth):
     res = manage_root(root, cur_interval, 1, max_depth)
     print_ip(res)
 
-    print '\nstatic const ip_level* %s[256] = {' % (array_name)
+    print('\nstatic const ip_level* %s[256] = {' % (array_name))
     for i in range(0, 256):
         if root_ips[i]:
-            print '\t&%s,' % (root_ips[i].name())
+            print('\t&%s,' % (root_ips[i].name()))
         else:
-            print '\tNULL, // %d' % (i)
-    print '};\n'
+            print('\tNULL, // %d' % (i))
+    print('};\n')
 
-build_array(array_vals_ipv4.values(), 's_root_ipv4', 3)
-build_array(array_vals_ipv6.values(), 's_root_ipv6', 15)
+build_array(list(array_vals_ipv4.values()), 's_root_ipv4', 3)
+build_array(list(array_vals_ipv6.values()), 's_root_ipv6', 15)
 
-print 'static const uint8_t country_codes[][3] = {'
+print('static const uint8_t country_codes[][3] = {')
 for cc in countries:
-    print '\t{"%s"},' % (cc)
-print '};\n'
+    print('\t{"%s"},' % (cc))
+print('};\n')
diff --git a/src/server.c b/src/server.c
index a22ae61..ad1fec4 100644
--- a/src/server.c
+++ b/src/server.c
@@ -62,8 +62,8 @@ typedef struct thread_ctx_s{
     socket_ctx_t* sockets;
     int nb_cur_sockets;
     int nb_available_sockets;
-    int max_timeout;
-    int max_sockets; // in ms
+    int max_timeout; // in ms
+    int max_sockets;
     int stop;
     int quiet;
     pthread_mutex_t mutex;
@@ -481,7 +481,7 @@ int daemonize(struct gengetopt_args_info* params)
             return -2;
         }
 
-        ret = listen(new_socket, 0);
+        ret = listen(new_socket, params->sockets_per_thread_arg);
         if (ret)
         {
             if (!params->quiet_flag)