Sending a UDP-message

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originally posted by niosiiuser@Nov 8 2005, 06:53 AM

hello danny,

does your target (perhaps the pc) send an answer for the arp requests? if not lwip can’t send any udp packets because the stack doesn’t know which mac address belongs to the ip address (in your code 169.254.0.1). but it must be possible to send broadcast messages. just change ip4_addr(&udpdestipaddr, 169, 254, 0, 1); to ip4_addr(&udpdestipaddr, 255, 255, 255, 255);.

regards,

niosiiuser

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Hello niosIIuser,

the pc does send a request.... so I don&#39;t know what is wrong.... but I&#39;ve got an idea... let&#39;s see if it works.

Cheers,

Danny