setsockopt issues

This is a discussion on setsockopt issues within the Linux Programming forums, part of the Platform Specific Boards category; I have a multi-process linux server application that receives a connection via accept() and forks to handle the requests on ...

  1. #1
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    setsockopt issues

    I have a multi-process linux server application that receives a connection via accept() and forks to handle the requests on that new connection. I'm calling setsockopt(ClientSocket, SOL_SOCKET, SO_REUSEADDR....) on the new sockets, and from time to time, this will completely lock up my server and make it stop passing the connections off to the handler. the new connections are accepted, and the fork occurs, but the child process just stops on the setsockopt() line.

    my question is: do I need to set that socket option on the new connection's socket, or just on the listening socket (which I also do)?

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    spurious conceit MK27's Avatar
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    Quote Originally Posted by Elkvis View Post
    my question is: do I need to set that socket option on the new connection's socket, or just on the listening socket (which I also do)?
    It does not make sense to use SO_REUSEADDR on the client sockets because they do not have bind() called on them, and are already connected.

    WRT your problem, that might even be the cause of it.
    Last edited by MK27; 06-22-2011 at 11:41 AM.
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

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    that makes sense. it seems to be working better since I commented out that section of code, so I think it's fixed, but I guess we'll see what happens.

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    spurious conceit MK27's Avatar
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    Quote Originally Posted by Elkvis View Post
    it seems to be working better but I guess we'll see what happens.
    Writing network code sometimes makes me think of trying to throw tennis balls into a hopper that might be a little bit too small, from twenty yards in pitch darkness, having never once seen the area in the light, with your thumb taped to your forefinger and a mysterious wind gusting intermittently from any direction.
    C programming resources:
    GNU C Function and Macro Index -- glibc reference manual
    The C Book -- nice online learner guide
    Current ISO draft standard
    CCAN -- new CPAN like open source library repository
    3 (different) GNU debugger tutorials: #1 -- #2 -- #3
    cpwiki -- our wiki on sourceforge

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