zs39 opened a new pull request, #13350:
URL: https://github.com/apache/nuttx/pull/13350

   
   ## Summary
   
   We don't reply ICMP error message when the destination address is 
broadcast/multicast.
   
   According to rfc1112, section 7.2:
   "An ICMP error message (Destination Unreachable, Time Exceeded, Parameter 
Problem, Source Quench, or Redirect) is never generated in response to a 
datagram destined to an IP host group."
   
   ## Impact
   
   Response to udp broadcast and multicast.
   
   ## Testing
   Local packet capture verification.
   


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