From: Joseph C. Lehner <joseph.c.lehner@gmail.com>
Date: Sun, 7 Feb 2016 20:21:43 +0000 (+0100)
Subject: Fix TFTP code
X-Git-Tag: v0.9~28
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=39b00333253c80698843e81e3fe4a14ed21af709;p=oweals%2Fnmrpflash.git

Fix TFTP code
---

diff --git a/tftp.c b/tftp.c
index 7c21304..9d6ae51 100644
--- a/tftp.c
+++ b/tftp.c
@@ -150,7 +150,7 @@ static ssize_t tftp_recvfrom(int sock, char *pkt, uint16_t* port,
 		 */
 		fprintf(stderr, "Error: %.32s\n", pkt);
 		return -3;
-	} else {
+	} else if (!opcode || opcode > ERR) {
 		fprintf(stderr, "Received invalid packet: ");
 		pkt_print(pkt, stderr);
 		fprintf(stderr, ".\n");