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>
diff --git a/net/tipc/link.h b/net/tipc/link.h
index e56cb53..7879239 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -45,6 +45,12 @@
#define PUSH_FINISHED 2
/*
+ * Out-of-range value for link sequence numbers
+ */
+
+#define INVALID_LINK_SEQ 0x10000
+
+/*
* Link states
*/