gnutls_record_send(3)              gnutls              gnutls_record_send(3)

NAME         top

       gnutls_record_send - API function

SYNOPSIS         top

       #include <gnutls/gnutls.h>

       ssize_t gnutls_record_send(gnutls_session_t session, const void *
       data, size_t data_size);

ARGUMENTS         top

       gnutls_session_t session
                   is a gnutls_session_t type.

       const void * data
                   contains the data to send

       size_t data_size
                   is the length of the data

DESCRIPTION         top

       This function has the similar semantics with send().  The only
       difference is that it accepts a GnuTLS session, and uses different
       error codes.  Note that if the send buffer is full, send() will block
       this function.  See the send() documentation for more information.

       You can replace the default push function which is send(), by using

       If the EINTR is returned by the internal push function then
       GNUTLS_E_AGAIN is returned, you must call this function again, with
       the exact same parameters; alternatively you could provide a NULL
       pointer for data, and 0 for size. cf. gnutls_record_get_direction().

       Note that in DTLS this function will return the GNUTLS_E_LARGE_PACKET
       error code if the send data exceed the data MTU value - as returned
       by gnutls_dtls_get_data_mtu(). The errno value EMSGSIZE also maps to
       GNUTLS_E_LARGE_PACKET.  Note that since 3.2.13 this function can be
       called under cork in DTLS mode, and will refuse to send data over the
       MTU size by returning GNUTLS_E_LARGE_PACKET.

RETURNS         top

       The number of bytes sent, or a negative error code.  The number of
       bytes sent might be less than  data_size .  The maximum number of
       bytes this function can send in a single call depends on the
       negotiated maximum record size.

REPORTING BUGS         top

       Report bugs to <>.
       Home page:

COPYRIGHT         top

       Copyright © 2001-2017 Free Software Foundation, Inc., and others.
       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         top

       The full documentation for gnutls is maintained as a Texinfo manual.
       If the /usr/share/doc/gnutls/ directory does not contain the HTML
       form visit 

COLOPHON         top

       This page is part of the GnuTLS (GnuTLS Transport Layer Security
       Library) project.  Information about the project can be found at 
       ⟨⟩.  If you have a bug report for this manual
       page, send it to  This page was obtained from the
       tarball gnutls-3.6.1.tar.xz fetched from
       ⟨⟩ on 2018-02-02.  If you discover
       any rendering problems in this HTML version of the page, or you
       believe there is a better or more up-to-date source for the page, or
       you have corrections or improvements to the information in this
       COLOPHON (which is not part of the original manual page), send a mail

gnutls                              3.6.1              gnutls_record_send(3)