rx: Limit window size to max acks

The RX ack packet can only acknowledge 255 packets at once. In the
current implementation, this limits our maximum window size to 255,
as we can't acknowledge any packets we receive outside of that window
size.

Reviewed-on: http://gerrit.openafs.org/2857
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
(cherry picked from commit 50920c0384189a6c635ca58c38bf7c942c0446b2)
Change-Id: I523afdacfc2a50239219d6d39cbea58ca22fee2e
Reviewed-on: http://gerrit.openafs.org/2931
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>

diff --git a/src/rx/rx_globals.h b/src/rx/rx_globals.h
index a6d02e613e78595de4e1b7ce63d2e5ac6131f01b..a515c11783d71b207664ad3387ac416456e759c6 100644 (file)
--- a/src/rx/rx_globals.h
+++ b/src/rx/rx_globals.h
@@ -126,7 +126,7 @@ EXT int rx_BusyError GLOBALSINIT(-1);
 
 EXT int rx_minPeerTimeout GLOBALSINIT(2); /* in milliseconds */
 EXT int rx_minWindow GLOBALSINIT(1);
-EXT int rx_maxWindow GLOBALSINIT(65535);        /* twind is u_short */
+EXT int rx_maxWindow GLOBALSINIT(RX_MAXACKS);   /* must ack what we receive */
 EXT int rx_initReceiveWindow GLOBALSINIT(16);  /* how much to accept */
 EXT int rx_maxReceiveWindow GLOBALSINIT(32);   /* how much to accept */
 EXT int rx_initSendWindow GLOBALSINIT(16);