gnutls_handshake(3) [centos man page]

gnutls_handshake(3)						      gnutls						       gnutls_handshake(3)

NAME

       gnutls_handshake - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

       int gnutls_handshake(gnutls_session_t session);

ARGUMENTS

       gnutls_session_t session
		   is a gnutls_session_t structure.

DESCRIPTION

       This function does the handshake of the TLS/SSL protocol, and initializes the TLS connection.

       This  function will fail if any problem is encountered, and will return a negative error code. In case of a client, if the client has asked
       to resume a session, but the server couldn't, then a full handshake will be performed.

       The non-fatal errors such as GNUTLS_E_AGAIN and GNUTLS_E_INTERRUPTED interrupt the handshake procedure,	which  should  be  resumed  later.
       Call this function again, until it returns 0; cf.  gnutls_record_get_direction() and gnutls_error_is_fatal().

       If  this  function  is called by a server after a rehandshake request then GNUTLS_E_GOT_APPLICATION_DATA or GNUTLS_E_WARNING_ALERT_RECEIVED
       may be returned.  Note that these are non fatal errors, only in the specific case of a rehandshake.   Their  meaning  is  that  the  client
       rejected the rehandshake request or in the case of GNUTLS_E_GOT_APPLICATION_DATA it might also mean that some data were pending.

RETURNS

       GNUTLS_E_SUCCESS on success, otherwise a negative error code.

REPORTING BUGS

       Report bugs to <bug-gnutls@gnu.org>.
       General guidelines for reporting bugs: http://www.gnu.org/gethelp/
       GnuTLS home page: http://www.gnu.org/software/gnutls/

COPYRIGHT

       Copyright (C) 2012 Free Software Foundation, Inc..
       Copying	and  distribution  of  this file, with or without modification, are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.

SEE ALSO

       The full documentation for gnutls is maintained as a Texinfo manual.  If the info and gnutls programs are properly installed at your  site,
       the command

	      info gnutls

       should give you access to the complete manual.  As an alternative you may obtain the manual from:

	      http://www.gnu.org/software/gnutls/manual/

gnutls								      3.1.15						       gnutls_handshake(3)

gnutls_bye(3)							      gnutls							     gnutls_bye(3)

NAME

       gnutls_bye - terminate the current TLS/SSL connection.

SYNOPSIS

       #include <gnutls/gnutls.h>

       int gnutls_bye(gnutls_session_t session, gnutls_close_request_t how);

ARGUMENTS

       gnutls_session_t session
		   is a gnutls_session_t structure.

       gnutls_close_request_t how
		   is an integer

DESCRIPTION

       Terminates  the	current  TLS/SSL  connection.  The  connection	should have been initiated using gnutls_handshake().  how should be one of
       GNUTLS_SHUT_RDWR, GNUTLS_SHUT_WR.

       In case of GNUTLS_SHUT_RDWR then the TLS connection gets terminated and further receives and sends will be disallowed.  If the return value
       is  zero you may continue using the connection.	GNUTLS_SHUT_RDWR actually sends an alert containing a close request and waits for the peer
       to reply with the same message.

       In case of GNUTLS_SHUT_WR then the TLS connection gets terminated and further sends will be disallowed. In order to  reuse  the	connection
       you should wait for an EOF from the peer.  GNUTLS_SHUT_WR sends an alert containing a close request.

       Note  that not all implementations will properly terminate a TLS connection.  Some of them, usually for performance reasons, will terminate
       only the underlying transport layer, thus causing a transmission error to the peer.  This error cannot be distinguished	from  a  malicious
       party prematurely terminating the session, thus this behavior is not recommended.

       This function may also return GNUTLS_E_AGAIN or GNUTLS_E_INTERRUPTED; cf.  gnutls_record_get_direction().

RETURNS

       GNUTLS_E_SUCCESS on success, or an error code, see function documentation for entire semantics.

REPORTING BUGS

       Report	bugs   to   <bug-gnutls@gnu.org>.   GnuTLS  home  page:  http://www.gnu.org/software/gnutls/  General  help  using  GNU  software:
       http://www.gnu.org/gethelp/

COPYRIGHT

       Copyright (C) 2008 Free Software Foundation.
       Copying and distribution of this file, with or without modification, are permitted in any medium without  royalty  provided  the  copyright
       notice and this notice are preserved.

SEE ALSO

       The  full documentation for gnutls is maintained as a Texinfo manual.  If the info and gnutls programs are properly installed at your site,
       the command

	      info gnutls

       should give you access to the complete manual.

gnutls								       2.8.6							     gnutls_bye(3)