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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)
This commit is contained in:
Robert Jordens 2013-11-11 15:45:45 -07:00 committed by Sebastien Bourdeauducq
parent 69568adb8e
commit 1a28690fa0
1 changed files with 2 additions and 2 deletions
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4
software/libnet/microudp.c
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@ -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,