From 2d4a5948fc28e897fa9c2c48545106bb6d28793b Mon Sep 17 00:00:00 2001
From: "Joseph C. Lehner" <joseph.c.lehner@gmail.com>
Date: Fri, 26 Apr 2019 20:43:45 +0200
Subject: [PATCH] Fix tftp block rollover

---
 tftp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tftp.c b/tftp.c
index de8f765..06258dc 100644
--- a/tftp.c
+++ b/tftp.c
@@ -400,8 +400,10 @@ int tftp_put(struct nmrpd_args *args)
 
 		if (timeouts || ackblock == block) {
 			if (!timeouts) {
-				// TODO: set block to 1 if ++block == 0 ?
-				++block;
+				if (++block == 0) {
+					// rollover; skip to block 1
+					block = 1;
+				}
 
 				pkt_mknum(tx, DATA);
 				pkt_mknum(tx + 2, block);
-- 
2.25.1