Telnet connections

This is a discussion on Telnet connections within the Networking/Device Communication forums, part of the General Programming Boards category; Hello, my program listens on port 23 for telnet connections, it works fine accept for when I try to recieve ...

  1. #1
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    Telnet connections

    Hello, my program listens on port 23 for telnet connections, it works fine accept for when I try to recieve some data. It recieves the correct data, but it also fills up the rest of the buffer with useless junk. How do I stop it sending me all this rubbish? Or is there a way to filter out the actual data?

    thanks everybody.

  2. #2
    and the hat of wrongness Salem's Avatar
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    Use the length returned by the recv() call rather than assuming that a \0 always exists in the place you expect it to.

    Code:
    char buff[BUFSIZ];
    int n = recv( fd, buff, BUFSIZ-1, 0 );  // allow for adding a \0
    if ( n > 0 ) buff[n] = '\0';

  3. #3
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    thank you very much.

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