src/patches/dhcp-4.2.0-inherit-leases.patch

   1 diff -up dhcp-4.2.0/client/dhclient.c.inherit dhcp-4.2.0/client/dhclient.c
   2 --- dhcp-4.2.0/client/dhclient.c.inherit        2010-07-21 14:33:44.000000000 +0200
   3 +++ dhcp-4.2.0/client/dhclient.c        2010-07-21 14:40:05.000000000 +0200
   4 @@ -2322,6 +2322,7 @@ void send_request (cpp)
   5  {
   6         struct client_state *client = cpp;
   7
   8 +       int i;
   9         int result;
  10         int interval;
  11         struct sockaddr_in destination;
  12 @@ -2381,6 +2382,22 @@ void send_request (cpp)
  13                 /* Now do a preinit on the interface so that we can
  14                    discover a new address. */
  15                 script_init (client, "PREINIT", (struct string_list *)0);
  16 +
  17 +               /* Has an active lease */
  18 +               if (client -> interface -> addresses != NULL) {
  19 +                       for (i = 0; i < client -> interface -> address_count; i++) {
  20 +                               if (client -> active &&
  21 +                                   client -> active -> is_bootp &&
  22 +                                   client -> active -> expiry > cur_time &&
  23 +                                   client -> interface -> addresses[i].s_addr != 0 &&
  24 +                                   client -> active -> address.len == 4 &&
  25 +                                   memcpy (client -> active -> address.iabuf, &(client -> interface -> addresses[i]), 4) == 0) {
  26 +                                       client_envadd (client, "", "keep_old_ip", "%s", "yes");
  27 +                                       break;
  28 +                               }
  29 +                       }
  30 +               }
  31 +
  32                 if (client -> alias)
  33                         script_write_params (client, "alias_",
  34                                              client -> alias);