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)
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gnutls_rehandshake(3) gnutls gnutls_rehandshake(3) NAME
gnutls_rehandshake - API function SYNOPSIS
#include <gnutls/gnutls.h> int gnutls_rehandshake(gnutls_session_t session); ARGUMENTS
gnutls_session_t session is a gnutls_session_t structure. DESCRIPTION
This function will renegotiate security parameters with the client. This should only be called in case of a server. This message informs the peer that we want to renegotiate parameters (perform a handshake). If this function succeeds (returns 0), you must call the gnutls_handshake() function in order to negotiate the new parameters. Since TLS is full duplex some application data might have been sent during peer's processing of this message. In that case one should call gnutls_record_recv() until GNUTLS_E_REHANDSHAKE is returned to clear any pending data. Care must be taken if rehandshake is mandatory to terminate if it does not start after some threshold. If the client does not wish to renegotiate parameters he will should with an alert message, thus the return code will be GNUTLS_E_WARN- ING_ALERT_RECEIVED and the alert will be GNUTLS_A_NO_RENEGOTIATION. A client may also choose to ignore this message. 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_rehandshake(3)