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SSL_want_write (3)
  • >> SSL_want_write (3) ( Разные man: Библиотечные вызовы )
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    NAME

    SSL_want, SSL_want_nothing, SSL_want_read, SSL_want_write, SSL_want_x509_lookup - obtain state information TLS/SSL I/O operation
     
    

    SYNOPSIS

     #include <openssl/ssl.h>
    
    

     int SSL_want(const SSL *ssl);
     int SSL_want_nothing(const SSL *ssl);
     int SSL_want_read(const SSL *ssl);
     int SSL_want_write(const SSL *ssl);
     int SSL_want_x509_lookup(const SSL *ssl);
    
    
     

    DESCRIPTION

    SSL_want() returns state information for the SSL object ssl.

    The other SSL_want_*() calls are shortcuts for the possible states returned by SSL_want().  

    NOTES

    SSL_want() examines the internal state information of the SSL object. Its return values are similar to that of SSL_get_error(3). Unlike SSL_get_error(3), which also evaluates the error queue, the results are obtained by examining an internal state flag only. The information must therefore only be used for normal operation under non-blocking I/O. Error conditions are not handled and must be treated using SSL_get_error(3).

    The result returned by SSL_want() should always be consistent with the result of SSL_get_error(3).  

    RETURN VALUES

    The following return values can currently occur for SSL_want():
    SSL_NOTHING
    There is no data to be written or to be read.
    SSL_WRITING
    There are data in the SSL buffer that must be written to the underlying BIO layer in order to complete the actual SSL_*() operation. A call to SSL_get_error(3) should return SSL_ERROR_WANT_WRITE.
    SSL_READING
    More data must be read from the underlying BIO layer in order to complete the actual SSL_*() operation. A call to SSL_get_error(3) should return SSL_ERROR_WANT_READ.
    SSL_X509_LOOKUP
    The operation did not complete because an application callback set by SSL_CTX_set_client_cert_cb() has asked to be called again. A call to SSL_get_error(3) should return SSL_ERROR_WANT_X509_LOOKUP.

    SSL_want_nothing(), SSL_want_read(), SSL_want_write(), SSL_want_x509_lookup() return 1, when the corresponding condition is true or 0 otherwise.  

    SEE ALSO

    ssl(3), err(3), SSL_get_error(3)


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    NOTES
    RETURN VALUES
    SEE ALSO


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