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gnutls_rehandshake(3) [centos man page]

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)

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gnutls_record_recv(3)						      gnutls						     gnutls_record_recv(3)

NAME
gnutls_record_recv - API function SYNOPSIS
#include <gnutls/gnutls.h> ssize_t gnutls_record_recv(gnutls_session_t session, void * data, size_t data_size); ARGUMENTS
gnutls_session_t session is a gnutls_session_t structure. void * data the buffer that the data will be read into size_t data_size the number of requested bytes DESCRIPTION
This function has the similar semantics with recv(). The only difference is that it accepts a GnuTLS session, and uses different error codes. In the special case that a server requests a renegotiation, the client may receive an error code of GNUTLS_E_REHANDSHAKE. This message may be simply ignored, replied with an alert GNUTLS_A_NO_RENEGOTIATION, or replied with a new handshake, depending on the client's will. If EINTR is returned by the internal push function (the default is recv()) then GNUTLS_E_INTERRUPTED will be returned. If GNUTLS_E_INTERRUPTED or GNUTLS_E_AGAIN is returned, you must call this function again to get the data. See also gnutls_record_get_direc- tion(). A server may also receive GNUTLS_E_REHANDSHAKE when a client has initiated a handshake. In that case the server can only initiate a handshake or terminate the connection. RETURNS
The number of bytes received and zero on EOF (for stream connections). A negative error code is returned in case of an error. The number of bytes received might be less than the requested data_size . 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_record_recv(3)
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