From: Robert Jordens <jordens@gmail.com>
Date: Mon, 11 Nov 2013 22:45:45 +0000 (-0700)
Subject: microudp: fix udp txlen
X-Git-Tag: 24jan2021_ls180~2809
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1a28690fa05ae821e2e8ba689292e37a0e6f3491;p=litex.git

microudp: fix udp txlen

* the preample length 8 is already included in sizeof(struct
ethernet_header)
* the minimum packet size is 64, exluding fcs and including
preample it is 68 (the arp functions are correct)
---

diff --git a/software/libnet/microudp.c b/software/libnet/microudp.c
index 31bb5aae..d499d639 100644
--- a/software/libnet/microudp.c
+++ b/software/libnet/microudp.c
@@ -262,8 +262,8 @@ int microudp_send(unsigned short src_port, unsigned short dst_port, unsigned int
 		&& (cached_mac[3] == 0) && (cached_mac[4] == 0) && (cached_mac[5] == 0))
 		return 0;
 
-	txlen = length + sizeof(struct ethernet_header) + sizeof(struct udp_frame) + 8;
-	if(txlen < 72) txlen = 72;
+	txlen = length + sizeof(struct ethernet_header) + sizeof(struct udp_frame);
+	if(txlen < 68) txlen = 68;
 	
 	fill_eth_header(&txbuffer->frame.eth_header,
 		cached_mac,