1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
@deftypefun {ssize_t} {gnutls_record_send} (gnutls_session_t @var{session}, const void * @var{data}, size_t @var{data_size})
@var{session}: is a @code{gnutls_session_t} structure.
@var{data}: contains the data to send
@var{data_size}: is the length of the data
This function has the similar semantics with @code{send()} . The only
difference is that it accepts a GnuTLS session, and uses different
error codes.
Note that if the send buffer is full, @code{send()} will block this
function. See the @code{send()} documentation for more information.
You can replace the default push function which is @code{send()} , by using
@code{gnutls_transport_set_push_function()} .
If the EINTR is returned by the internal push function
then @code{GNUTLS_E_INTERRUPTED} will be returned. If
@code{GNUTLS_E_INTERRUPTED} or @code{GNUTLS_E_AGAIN} is returned, you must
call this function again, with the exact same parameters; alternatively
you could provide a @code{NULL} pointer for data, and 0 for
size. cf. @code{gnutls_record_get_direction()} .
Note that in DTLS this function will return the @code{GNUTLS_E_LARGE_PACKET}
error code if the send data exceed the data MTU value - as returned
by @code{gnutls_dtls_get_data_mtu()} . The errno value EMSGSIZE
also maps to @code{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
@code{GNUTLS_E_LARGE_PACKET} .
@strong{Returns:} The number of bytes sent, or a negative error code. The
number of bytes sent might be less than @code{data_size} . The maximum
number of bytes this function can send in a single call depends
on the negotiated maximum record size.
@end deftypefun
|
