NAME

       gnutls_record_send - API function

SYNOPSIS

       #include <gnutls/gnutls.h>

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

ARGUMENTS

       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

       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 gnutls_transport_set_push_function().

       If  the  EINTR  is  returned by the internal push function then GNUTLS_E_INTERRUPTED will be returned. If
       GNUTLS_E_INTERRUPTED or GNUTLS_E_AGAIN is returned, you must call this function again with the exact same
       parameters, or provide a NULL pointer for  data and 0 for  data_size , in order to write the same data as
       before.  If  you  wish  to  discard  the   previous   data   instead   of   retrying,   you   must   call
       gnutls_record_discard_queued()  before  calling  this  function  with different parameters. Note that the
       latter works only on special transports (e.g., UDP).  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

       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

       Report bugs to <bugs@gnutls.org>.
       Home page: https://www.gnutls.org

COPYRIGHT

       Copyright © 2001-2023 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

       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

       https://www.gnutls.org/manual/

gnutls                                                3.8.3                                gnutls_record_send(3)