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rpms/dhcp/FC-4 dhcp-3.0.2-dhclient_decline_backoff.patch,NONE,1.1



Author: jvdias

Update of /cvs/dist/rpms/dhcp/FC-4
In directory cvs.devel.redhat.com:/tmp/cvs-serv27989

Added Files:
	dhcp-3.0.2-dhclient_decline_backoff.patch 
Log Message:
prevent network flood on repeated DHCPDECLINE

dhcp-3.0.2-dhclient_decline_backoff.patch:
 client/dhclient.c |   19 ++++++++++++++++---
 includes/dhcpd.h  |    3 ++-
 2 files changed, 18 insertions(+), 4 deletions(-)

--- NEW FILE dhcp-3.0.2-dhclient_decline_backoff.patch ---
--- dhcp-3.0.2/client/dhclient.c.dhclient_decline_backoff	2005-06-10 13:59:11.000000000 -0400
+++ dhcp-3.0.2/client/dhclient.c	2005-06-10 14:00:05.000000000 -0400
@@ -707,6 +707,7 @@
 	void *cpp;
 {
 	struct client_state *client = cpp;
+	enum dhcp_state init_state = client -> state;
 
 	ASSERT_STATE(state, S_INIT);
 
@@ -719,9 +720,20 @@
 	client -> first_sending = cur_time;
 	client -> interval = client -> config -> initial_interval;
 
-	/* Add an immediate timeout to cause the first DHCPDISCOVER packet
-	   to go out. */
-	send_discover (client);
+	if ( init_state != S_DECLINED )
+	{
+		/* Add an immediate timeout to cause the first DHCPDISCOVER packet
+		   to go out. */	
+		send_discover (client);
+	}else
+	{
+		/* We've received an OFFER and it has been DECLINEd by dhclient-script.
+		 * wait for a random time between 1 and backoff_cutoff seconds before trying again. 
+		 */
+		add_timeout( cur_time + (( 1 + (random () >> 2) ) %  client -> config -> backoff_cutoff),
+			     send_discover, client, 0, 0
+			   ); 
+	}
 }
 
 /* state_selecting is called when one or more DHCPOFFER packets have been
@@ -994,6 +1006,7 @@
 		send_decline (client);
 		destroy_client_lease (client -> new);
 		client -> new = (struct client_lease *)0;
+		client -> state = S_DECLINED;
 		state_init (client);
 		return;
 	}
--- dhcp-3.0.2/includes/dhcpd.h.dhclient_decline_backoff	2005-06-10 13:59:11.000000000 -0400
+++ dhcp-3.0.2/includes/dhcpd.h	2005-06-10 13:59:11.000000000 -0400
@@ -658,7 +658,8 @@
 	S_BOUND = 5,
 	S_RENEWING = 6,
 	S_REBINDING = 7,
-	S_STOPPED = 8
+	S_STOPPED = 8,
+	S_DECLINED= 9
 };
 
 /* Authentication and BOOTP policy possibilities (not all values work


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