[I] [BUG] getaddrinfo doesn't fill ai_protocol [nuttx]

["yamt (via GitHub)" <gi...@apache.org>]

yamt opened a new issue, #16693:
URL: https://github.com/apache/nuttx/issues/16693

   ### Description / Steps to reproduce the issue
   
   consider using getaddrinfo with
   hints.ai_family == AF_INET
   hints.ai_socktype == SOCK_STREAM
   hints.ai_protocol == 0
   
   i expect the result contains ai_protocol == IPPROTO_TCP.
   but nuttx seems to leave it to 0.
   
   standard-wise, the nuttx behavior might or might be allowed. (i haven't checked.)
   
   anyway, i guess it's better to follow the de-fact behavior (kame etc) for compatibility for applications.
   for example, wamr seems to have [the assumption](https://github.com/bytecodealliance/wasm-micro-runtime/blob/d3b0b5c066e21ba3568448ad42e0b920e67d16ba/core/shared/platform/common/posix/posix_socket.c#L376-L377).
   
   
   ### On which OS does this issue occur?
   
   [OS: Mac]
   
   ### What is the version of your OS?
   
   macOS 15.5
   
   ### NuttX Version
   
   master
   
   ### Issue Architecture
   
   [Arch: simulator]
   
   ### Issue Area
   
   [Area: Networking]
   
   ### Host information
   
   _No response_
   
   ### Verification
   
   - [x] I have verified before submitting the report.


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Re: [I] [BUG] getaddrinfo doesn't fill ai_protocol [nuttx]

["yamt (via GitHub)" <gi...@apache.org>]

yamt commented on issue #16693:
URL: https://github.com/apache/nuttx/issues/16693#issuecomment-3050960755

   > standard-wise, the nuttx behavior might or might be allowed. (i haven't checked.)
   
   standard-wise, i couldn't find anything about ai_protocol in susv4-2018 except the following text:
   
       The fields ai_family, ai_socktype, and ai_protocol shall be usable
       as the arguments to the socket() function to create a socket suitable
       for use with the returned address.
   
   because ai_protocol is usually merely used to feed socket() and socket() usually accepts 0, it's probably standard-wise ok for getaddrinfo to return ai_protocol=0.
   


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Re: [I] [BUG] getaddrinfo doesn't fill ai_protocol [nuttx]

["xiaoxiang781216 (via GitHub)" <gi...@apache.org>]

xiaoxiang781216 closed issue #16693: [BUG] getaddrinfo doesn't fill ai_protocol
URL: https://github.com/apache/nuttx/issues/16693


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