static ssize_t schan_pull_adapter(gnutls_transport_ptr_t transport,
void *buff, size_t buff_len)
{
struct schan_transport *t = (struct schan_transport*)transport;
gnutls_session_t s = (gnutls_session_t)schan_session_for_transport(t);
int ret = schan_pull(transport, buff, &buff_len);
if (ret)
{
pgnutls_transport_set_errno(s, ret);
return -1;
}
return buff_len;
}
/* schan_pull_adapter
* Callback registered with SSLSetIOFuncs as the read function for a
* session. Reads data from the session connection. Conforms to the
* SSLReadFunc type.
*
* transport - The session connection
* buff - The buffer into which to store the read data. Must be at least
* *buff_len bytes in length.
* *buff_len - On input, the desired length to read. On successful return,
* the number of bytes actually read.
*
* Returns:
* noErr on complete success meaning the requested length was successfully
* read.
* errSSLWouldBlock when the requested length could not be read without
* blocking. *buff_len indicates how much was actually read. The
* caller should try again if/when they want to read more.
* errSSLClosedGraceful when the connection has closed and there's no
* more data to be read.
* other error code for failure.
*/
static OSStatus schan_pull_adapter(SSLConnectionRef transport, void *buff,
SIZE_T *buff_len)
{
struct mac_session *s = (struct mac_session*)transport;
size_t requested = *buff_len;
int status;
OSStatus ret;
TRACE("(%p/%p, %p, %p/%lu)\n", s, s->transport, buff, buff_len, *buff_len);
status = schan_pull(s->transport, buff, buff_len);
if (status == 0)
{
if (*buff_len == 0)
{
TRACE("Connection closed\n");
ret = errSSLClosedGraceful;
}
else if (*buff_len < requested)
{
TRACE("Pulled %lu bytes before would block\n", *buff_len);
ret = errSSLWouldBlock;
}
else
{
TRACE("Pulled %lu bytes\n", *buff_len);
ret = noErr;
}
}
else if (status == EAGAIN)
{
TRACE("Would block before being able to pull anything\n");
ret = errSSLWouldBlock;
}
else
{
FIXME("Unknown status code from schan_pull: %d\n", status);
ret = ioErr;
}
return ret;
}
