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diff -up dhcp-4.3.4/client/dhclient.c.backoff dhcp-4.3.4/client/dhclient.c
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--- dhcp-4.3.4/client/dhclient.c.backoff 2016-04-29 12:16:26.976245611 +0200
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+++ dhcp-4.3.4/client/dhclient.c 2016-04-29 12:16:26.979245609 +0200
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@@ -1423,6 +1423,8 @@ void state_init (cpp)
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void *cpp;
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{
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struct client_state *client = cpp;
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+ enum dhcp_state init_state = client->state;
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+ struct timeval tv;
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ASSERT_STATE(state, S_INIT);
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@@ -1435,9 +1437,18 @@ void state_init (cpp)
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client -> first_sending = cur_time;
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client -> interval = client -> config -> initial_interval;
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- /* Add an immediate timeout to cause the first DHCPDISCOVER packet
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- to go out. */
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- send_discover (client);
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+ if (init_state != S_DECLINED) {
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+ /* Add an immediate timeout to cause the first DHCPDISCOVER packet
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+ to go out. */
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+ send_discover(client);
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+ } else {
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+ /* We've received an OFFER and it has been DECLINEd by dhclient-script.
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+ * wait for a random time between 1 and backoff_cutoff seconds before
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+ * trying again. */
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+ tv . tv_sec = cur_time + ((1 + (random() >> 2)) % client->config->backoff_cutoff);
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+ tv . tv_usec = 0;
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+ add_timeout(&tv, send_discover, client, 0, 0);
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+ }
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}
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/*
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@@ -1734,5 +1745,6 @@ void bind_lease (client)
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#endif
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exit(2);
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} else {
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+ client -> state = S_DECLINED;
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state_init(client);
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return;
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}
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@@ -4626,6 +4638,7 @@ void client_location_changed ()
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case S_INIT:
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case S_REBINDING:
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case S_STOPPED:
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+ case S_DECLINED:
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break;
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}
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client -> state = S_INIT;
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diff -up dhcp-4.3.4/includes/dhcpd.h.backoff dhcp-4.3.4/includes/dhcpd.h
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--- dhcp-4.3.4/includes/dhcpd.h.backoff 2016-04-29 12:16:26.980245609 +0200
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+++ dhcp-4.3.4/includes/dhcpd.h 2016-04-29 12:17:30.893203533 +0200
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@@ -1171,7 +1171,8 @@ enum dhcp_state {
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S_BOUND = 5,
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S_RENEWING = 6,
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S_REBINDING = 7,
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- S_STOPPED = 8
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+ S_STOPPED = 8,
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+ S_DECLINED = 9
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};
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/* Possible pending client operations. */
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