[I] [BUG] nat_port_select() returned value not safe [nuttx]

[via GitHub]

CosmicRoach opened a new issue, #16429:
URL: https://github.com/apache/nuttx/issues/16429

   ### Description / Steps to reproduce the issue
   
   Returned Value:
    *   External port number on success; 0 on failure
   In some cases，when the return value is 0, it may indicate success.
   
   
![Image](https://github.com/user-attachments/assets/02964248-74cb-4426-a93f-a8a5b21fe393)
   
   ipv4_nat_outbound_icmp() use icmp->id as port, but some careless 
applications may send ICMP request packets with icmp->id == 0, in this case, 
nat_port_select() will return a port number of 0, this 0 is a selected result, 
not a failure to find a port. 
   
   
![Image](https://github.com/user-attachments/assets/544ff796-8719-4b68-9afc-dfe9ba1ce64d)
   
   The return value of 0 is interpreted as an error here, preventing subsequent 
processes from proceeding.
   
![Image](https://github.com/user-attachments/assets/8e1288bc-0caa-470c-bd26-2a2dfc2e4734)
   
   ### On which OS does this issue occur?
   
   [OS: Other]
   
   ### What is the version of your OS?
   
   .
   
   ### NuttX Version
   
   all
   
   ### Issue Architecture
   
   [Arch: arm]
   
   ### Issue Area
   
   [Area: Networking]
   
   ### Host information
   
   _No response_
   
   ### Verification
   
   - [x] I have verified before submitting the report.


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