[GitHub] [incubator-nuttx] anchao opened a new pull request, #6970: net/getsockname: small addrlen should be a valid value

[GitBox]

anchao opened a new pull request, #6970:
URL: https://github.com/apache/incubator-nuttx/pull/6970

   ## Summary
   
   net/getsockname: small addrlen should be a valid value
   
   fix usrsock getsockname fail
   
   ```
   nsh> usrsocktest
   ...
   Testing group "basic_getsockname" =>
           [TEST ASSERT FAILED!]
                   In function "basic_getsockname_open":
                   line 170: Assertion `(ssize_t)((ret)) == (ssize_t)((0))' 
failed.
                           got value: -1
                           should be: 0
           Group "basic_getsockname": [FAILED]
   ...
   ```
   
   ```
   Reference:
   
   GETSOCKNAME(2)
   
   NAME
          getsockname - get socket name
   ...
   DESCRIPTION
   ...
          The returned address is truncated if the buffer provided is too small;
          in this case, addrlen will return a value greater than was supplied 
to the call.
   ```
   
   
   ## Impact
   
   N/A
   
   ## Testing
   
   Pass the usrsock test:
   
https://github.com/apache/incubator-nuttx-apps/blob/master/examples/usrsocktest/usrsocktest_basic_getsockname.c#L168-L170


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