X-Git-Url: http://git.meshlink.io/?p=utcp;a=blobdiff_plain;f=utcp.c;h=cb23e1bf3d6413510d8dd729f7dd00e781eb4291;hp=7aeb2d358cf7b3157672f8bb2f25b488b9a40606;hb=8b12570493ab77960aeac7e3e4a9bc458bb4f1a1;hpb=79473544a4e53159f178e8542f0936f8abd42821

diff --git a/utcp.c b/utcp.c
index 7aeb2d3..cb23e1b 100644
--- a/utcp.c
+++ b/utcp.c
@@ -521,10 +521,14 @@ static void ack(struct utcp_connection *c, bool sendatleastone) {
 
 	assert(left >= 0);
 
-	if(cwndleft < 0) {
+	if(cwndleft <= 0) {
 		left = 0;
 	} else if(cwndleft < left) {
 		left = cwndleft;
+
+		if(!sendatleastone || cwndleft > c->utcp->mtu) {
+			left -= left % c->utcp->mtu;
+		}
 	}
 
 	debug("cwndleft = %d, left = %d\n", cwndleft, left);