Skip to content
Permalink
Browse files
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)
  • Loading branch information
jordens authored and Sebastien Bourdeauducq committed Nov 12, 2013
1 parent 69568ad commit 1a28690fa05ae821e2e8ba689292e37a0e6f3491
Showing with 2 additions and 2 deletions.
  1. +2 −2 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,

0 comments on commit 1a28690

Please sign in to comment.