gnutls_record_send23
Api function
Usage
#include <gnutls/gnutls.h>
ssize_t gnutls_record_send2(gnutls_session_t session, const void * data, size_t data_size, size_t pad, unsigned flags);
Arguments
gnutls_session_t session
|
is a |
|---|---|
const void * data
|
contains the data to send |
size_t data_size
|
is the length of the data |
size_t pad
|
padding to be added to the record |
unsigned flags
|
must be zero |
Overview
This function is identical to gnutls_record_send() except that it takes an extra argument to specify padding to be added the record. To determine the maximum size of padding, use gnutls_record_get_max_size() and gnutls_record_overhead_size().
Note that in order for GnuTLS to provide constant time processing of padding and data in TLS1.3, the flag GNUTLS_SAFE_PADDING_CHECK must be used in gnutls_init().
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.
Since
3.6.3
Releases
5 releases since Debian 10 (Buster); the text changed 4 times.