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NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURNS | REPORTING BUGS | COPYRIGHT | SEE ALSO | COLOPHON |
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gnutls_record_send(3) gnutls gnutls_record_send(3)
gnutls_record_send - API function
#include <gnutls/gnutls.h>
ssize_t gnutls_record_send(gnutls_session_t session, const void *
data, size_t data_size);
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
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.
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.
Report bugs to <[email protected]>.
Home page: https://www.gnutls.org
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.
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/
This page is part of the GnuTLS (GnuTLS Transport Layer Security
Library) project. Information about the project can be found at
⟨http://www.gnutls.org/⟩. If you have a bug report for this
manual page, send it to [email protected]. This page was obtained
from the tarball fetched from
⟨https://www.gnupg.org/ftp/gcrypt/gnutls/⟩ on 2025-08-11. 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 to [email protected]
gnutls 3.8.10 gnutls_record_send(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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