dhcp-dhclient-decline-backoff.patch

   1 diff -up dhcp-4.3.4/client/dhclient.c.backoff dhcp-4.3.4/client/dhclient.c
   2 --- dhcp-4.3.4/client/dhclient.c.backoff        2016-04-29 12:16:26.976245611 +0200
   3 +++ dhcp-4.3.4/client/dhclient.c        2016-04-29 12:16:26.979245609 +0200
   4 @@ -1423,6 +1423,8 @@ void state_init (cpp)
   5         void *cpp;
   6  {
   7         struct client_state *client = cpp;
   8 +       enum dhcp_state init_state = client->state;
   9 +       struct timeval tv;
  10
  11         ASSERT_STATE(state, S_INIT);
  12
  13 @@ -1435,9 +1437,18 @@ void state_init (cpp)
  14         client -> first_sending = cur_time;
  15         client -> interval = client -> config -> initial_interval;
  16
  17 -       /* Add an immediate timeout to cause the first DHCPDISCOVER packet
  18 -          to go out. */
  19 -       send_discover (client);
  20 +       if (init_state != S_DECLINED) {
  21 +               /* Add an immediate timeout to cause the first DHCPDISCOVER packet
  22 +                  to go out. */
  23 +               send_discover(client);
  24 +       } else {
  25 +               /* We've received an OFFER and it has been DECLINEd by dhclient-script.
  26 +                * wait for a random time between 1 and backoff_cutoff seconds before
  27 +                * trying again. */
  28 +               tv . tv_sec = cur_time + ((1 + (random() >> 2)) %  client->config->backoff_cutoff);
  29 +               tv . tv_usec = 0;
  30 +               add_timeout(&tv, send_discover, client, 0, 0);
  31 +       }
  32  }
  33
  34  /*
  35 @@ -1734,6 +1745,7 @@ void bind_lease (client)
  36                                          "try (declined).  Exiting.");
  37                         exit(2);
  38                 } else {
  39 +                       client -> state = S_DECLINED;
  40                         state_init(client);
  41                         return;
  42                 }
  43 @@ -4626,6 +4638,7 @@ void client_location_changed ()
  44                               case S_INIT:
  45                               case S_REBINDING:
  46                               case S_STOPPED:
  47 +                             case S_DECLINED:
  48                                 break;
  49                         }
  50                         client -> state = S_INIT;
  51 diff -up dhcp-4.3.4/includes/dhcpd.h.backoff dhcp-4.3.4/includes/dhcpd.h
  52 --- dhcp-4.3.4/includes/dhcpd.h.backoff 2016-04-29 12:16:26.980245609 +0200
  53 +++ dhcp-4.3.4/includes/dhcpd.h 2016-04-29 12:17:30.893203533 +0200
  54 @@ -1171,7 +1171,8 @@ enum dhcp_state {
  55         S_BOUND = 5,
  56         S_RENEWING = 6,
  57         S_REBINDING = 7,
  58 -       S_STOPPED = 8
  59 +       S_STOPPED = 8,
  60 +       S_DECLINED = 9
  61  };
  62
  63  /* Possible pending client operations. */