SSL_want_x509_lookup man page on DigitalUNIX

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SSL_want(3)							   SSL_want(3)

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

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

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

NOTES
       The SSL_want() function examines the internal state information of  the
       SSL   object.   Its   return   values   are  similar  to	 that  of  the
       SSL_get_error() function. Unlike SSL_get_error(), which also  evaluates
       the  error  queue,  the	results	 are obtained by examining an internal
       state flag only. Therefore, the information must only be used for  nor‐
       mal  operation under non-blocking I/O. Error conditions are not handled
       and must be treated using SSL_get_error().

       The result returned by the SSL_want() function should always be consis‐
       tent with the result of the SSL_get_error() function.

RETURN VALUES
       The  following return values can occur for SSL_want(): There is no data
       to be written or to be read.  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()	should	return
       SSL_ERROR_WANT_WRITE.   More  data must be read from the underlying BIO
       layer in order to complete the actual SSL_*()  operation.   A  call  to
       SSL_get_error()	should	return SSL_ERROR_WANT_READ.  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() should return SSL_ERROR_WANT_X509_LOOKUP.

       The   SSL_want_nothing(),   SSL_want_read(),   SSL_want_write(),	   and
       SSL_want_x509_lookup() functions return 1 when the corresponding condi‐
       tion is true or 0 otherwise.

SEE ALSO
       Functions: ssl(3), err(3), SSL_get_error(3)

								   SSL_want(3)
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