hello
I am testing the use of network extension. When we use dnsproxy to proxy DNS requests, we will send you a message that the udp pcbcount of your system continues to increase. For example
for ((i=1; i<=99999; i++));do echo "Attempt $i:" dig google.com done
when the dig command is used continuously, the dig command will show the following errors when pcbcount reaches a certain number.
isc_socket_bind: address not available
Can you help us determine what the problem might be? thank you
Are you sure you’re passing the right endpoint info through to the open(withLocalEndpoint:completionHandler:) method?
Note On macOS 15 and later this in deprecated in favour of open(withLocalFlowEndpoint:completionHandler:), which uses Network framework types, but the effect is the same.
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thanks for your reply when we proces udp flow,we passed (NWHostEndpoint * )udp_flow.localEndpoint to flow open api。is that right？
we also test passed the endpoint like :
NWHostEndpoint* endpoint =
[NWHostEndpoint endpointWithHostname:@"0.0.0.0" port:@"0"];
and passed nil to open api. also cause net.inet.udp.pcbcount increased
after open the flow we create a bsd socket to proxy the flow request.