tipc: Ignore broadcast acknowledgements that are out-of-range

Adds checks to TIPC's broadcast link so that it ignores any
acknowledgement message containing a sequence number that does not
correspond to an unacknowledged message currently in the broadcast
link's transmit queue.

This change prevents the broadcast link from becoming stalled if a
newly booted node receives stale broadcast link acknowledgement
information from another node that has not yet fully synchronized
its end of the broadcast link to reflect the current state of the
new node's end.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

This commit is contained in:

Allan Stephens

2011-10-24 15:26:24 -04:00

committed by

Paul Gortmaker

parent 10745cd599

commit 3655959143

4 changed files with 37 additions and 13 deletions

									
										net/tipc/link.h
									
		+6
		
												View File
												
				@@ -44,6 +44,12 @@

				#define PUSH_FAILED   1

				#define PUSH_FINISHED 2

				/*

				 * Out-of-range value for link sequence numbers

				 */

				#define INVALID_LINK_SEQ 0x10000

				/*

				 * Link states

				 */