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/*
* Copyright (c) 2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <openssl/bio.h>
#include <openssl/err.h>
#include <vnet/session/session.h>
#include <vnet/session/application_interface.h>
static inline session_t *
bio_session (BIO * bio)
{
return session_get_from_handle (pointer_to_uword (BIO_get_data (bio)));
}
static int
bio_tls_alloc (BIO * bio)
{
BIO_set_init (bio, 0);
BIO_set_data (bio, 0);
BIO_set_flags (bio, 0);
BIO_set_shutdown (bio, 0);
return 1;
}
static int
bio_tls_free (BIO * bio)
{
if (!bio)
return 0;
if (BIO_get_shutdown (bio))
{
if (BIO_get_init (bio))
session_close (bio_session (bio));
BIO_set_init (bio, 0);
BIO_set_flags (bio, 0);
}
return 1;
}
static int
bio_tls_read (BIO * b, char *out, int outl)
{
session_t *s;
int rv;
if (PREDICT_FALSE (!out))
return 0;
s = bio_session (b);
if (!s)
{
clib_warning ("no session");
errno = EBADFD;
return -1;
}
rv = app_recv_stream_raw (s->rx_fifo, (u8 *) out, outl,
0 /* clear evt */ , 0 /* peek */ );
if (rv < 0)
{
BIO_set_retry_read (b);
errno = EAGAIN;
return -1;
}
if (svm_fifo_is_empty_cons (s->rx_fifo))
svm_fifo_unset_event (s->rx_fifo);
BIO_clear_retry_flags (b);
return rv;
}
static int
bio_tls_write (BIO * b, const char *in, int inl)
{
svm_msg_q_t *mq;
session_t *s;
int rv;
if (PREDICT_FALSE (!in))
return 0;
s = bio_session (b);
if (!s)
{
clib_warning ("no session");
errno = EBADFD;
return -1;
}
mq = session_main_get_vpp_event_queue (s->thread_index);
rv = app_send_stream_raw (s->tx_fifo, mq, (u8 *) in, inl,
SESSION_IO_EVT_TX, 1 /* do_evt */ ,
0 /* noblock */ );
if (rv < 0)
{
BIO_set_retry_write (b);
errno = EAGAIN;
return -1;
}
BIO_clear_retry_flags (b);
return rv;
}
long
bio_tls_ctrl (BIO * b, int cmd, long larg, void *ptr)
{
long ret = 1;
switch (cmd)
{
case BIO_C_SET_FD:
ASSERT (0);
break;
case BIO_C_GET_FD:
ASSERT (0);
break;
case BIO_CTRL_GET_CLOSE:
ret = BIO_get_shutdown (b);
break;
case BIO_CTRL_SET_CLOSE:
BIO_set_shutdown (b, (int) larg);
break;
case BIO_CTRL_DUP:
case BIO_CTRL_FLUSH:
ret = 1;
break;
case BIO_CTRL_PENDING:
ret = 0;
break;
default:
ret = 0;
break;
}
return ret;
}
BIO *
BIO_new_tls (session_handle_t sh)
{
static BIO_METHOD *tls_bio_method;
BIO *b;
if (!tls_bio_method)
{
tls_bio_method = BIO_meth_new (BIO_TYPE_SOCKET, "tls_bio");
BIO_meth_set_write (tls_bio_method, bio_tls_write);
BIO_meth_set_read (tls_bio_method, bio_tls_read);
BIO_meth_set_create (tls_bio_method, bio_tls_alloc);
BIO_meth_set_destroy (tls_bio_method, bio_tls_free);
BIO_meth_set_ctrl (tls_bio_method, bio_tls_ctrl);
}
b = BIO_new (tls_bio_method);
/* Initialize the BIO */
BIO_set_data (b, uword_to_pointer (sh, void *));
BIO_set_init (b, 1);
return b;
}
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
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