gnutls_record_send(3) gnutls gnutls_record_send(3)
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 differ-
ence 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 dif-
ferent parameters. Note that the latter works only on special trans-
ports (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 maxi-
mum record size.
REPORTING BUGS
Report bugs to <bugs@gnutls.org>.
Home page: https://www.gnutls.org
COPYRIGHT
Copyright © 2001- 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 no-
tice 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 3.7.3 gnutls_record_send(3)
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