nuttxs opened a new pull request, #16240:
URL: https://github.com/apache/nuttx/pull/16240
## Summary
net/tcp/tcp_conn.c: optimize the port conflict detection rules for
tcp_listener().
Fixed potential conflict between implicit binding and port conflict
detection.
Implicit binding automatically allocates an interface address during
connection,but port conflict detection occurs before binding/connecting. This
can cause issues when creating multiple TCP connections in succession. If the
first connection uses a random port via implicit binding, subsequent
connections might reuse the same port under current filtering rules, leading to
connect() failures.
## Impact
New Feature/Change: Issue fix (no new feature).
User Impact: optimize the port conflict detection rules for tcp_listener().
Build Impact:No new Kconfig options or build system changes.
Security: No
Compatibility: Backward-compatible; no breaking changes.
## Testing
Scenario simulation:
```
// Connection A:
socket();
connect("192.168.1.100:8080"); // Implicitly binds to 192.168.1.100:random
port
// Connection B:
socket();
connect("192.168.1.100:8080"); // Under current filtering rules, port
conflict detection is ineffective, may randomly assign A's port
```
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