Noam Weissman wrote:
" you get the port of the remote application and use sendto() to respond"
The above is not what was questioned.
Application at embedded side sends the same message to several recipients from
the same port.
Depending on the recipient design that you have NO CONTROL of ... the recipient
will send back something to the
same port at the embedded side.
From
http://lists.nongnu.org/archive/html/lwip-users/2016-12/msg00015.html my
sendto/recvfrom example should work. If not, the OP should make clearer
what the actual problem is (or was?).
Simon
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