LCOV - code coverage report
Current view: top level - plugins/tlsopenssl - tls_bio.c (source / functions) Hit Total Coverage
Test: coverage-filtered.info Lines: 60 90 66.7 %
Date: 2023-10-26 01:39:38 Functions: 7 7 100.0 %

          Line data    Source code
       1             : 
       2             : /*
       3             :  * Copyright (c) 2020 Cisco and/or its affiliates.
       4             :  * Licensed under the Apache License, Version 2.0 (the "License");
       5             :  * you may not use this file except in compliance with the License.
       6             :  * You may obtain a copy of the License at:
       7             :  *
       8             :  *     http://www.apache.org/licenses/LICENSE-2.0
       9             :  *
      10             :  * Unless required by applicable law or agreed to in writing, software
      11             :  * distributed under the License is distributed on an "AS IS" BASIS,
      12             :  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      13             :  * See the License for the specific language governing permissions and
      14             :  * limitations under the License.
      15             :  */
      16             : #include <openssl/bio.h>
      17             : #include <openssl/err.h>
      18             : #include <vnet/session/session.h>
      19             : #include <vnet/session/application_interface.h>
      20             : 
      21             : static inline session_t *
      22        4243 : bio_session (BIO * bio)
      23             : {
      24        8486 :   return session_get_from_handle (pointer_to_uword (BIO_get_data (bio)));
      25             : }
      26             : 
      27             : static int
      28           8 : bio_tls_alloc (BIO * bio)
      29             : {
      30           8 :   BIO_set_init (bio, 0);
      31           8 :   BIO_set_data (bio, 0);
      32           8 :   BIO_set_flags (bio, 0);
      33           8 :   BIO_set_shutdown (bio, 0);
      34           8 :   return 1;
      35             : }
      36             : 
      37             : static int
      38           4 : bio_tls_free (BIO * bio)
      39             : {
      40           4 :   if (!bio)
      41           0 :     return 0;
      42             : 
      43           4 :   if (BIO_get_shutdown (bio))
      44             :     {
      45           0 :       if (BIO_get_init (bio))
      46           0 :         session_close (bio_session (bio));
      47           0 :       BIO_set_init (bio, 0);
      48           0 :       BIO_set_flags (bio, 0);
      49             :     }
      50             : 
      51           4 :   return 1;
      52             : }
      53             : 
      54             : static int
      55        3199 : bio_tls_read (BIO * b, char *out, int outl)
      56             : {
      57             :   session_t *s;
      58             :   int rv;
      59             : 
      60        3199 :   if (PREDICT_FALSE (!out))
      61           0 :     return 0;
      62             : 
      63        3199 :   s = bio_session (b);
      64        3199 :   if (!s)
      65             :     {
      66           0 :       clib_warning ("no session");
      67           0 :       errno = EBADFD;
      68           0 :       return -1;
      69             :     }
      70             : 
      71        3199 :   rv = app_recv_stream_raw (s->rx_fifo, (u8 *) out, outl,
      72             :                             0 /* clear evt */ , 0 /* peek */ );
      73        3199 :   if (rv < 0)
      74             :     {
      75         635 :       BIO_set_retry_read (b);
      76         635 :       errno = EAGAIN;
      77         635 :       return -1;
      78             :     }
      79             : 
      80        2564 :   if (svm_fifo_needs_deq_ntf (s->rx_fifo, rv))
      81             :     {
      82           0 :       svm_fifo_clear_deq_ntf (s->rx_fifo);
      83           0 :       session_send_io_evt_to_thread (s->rx_fifo, SESSION_IO_EVT_RX);
      84             :     }
      85             : 
      86        2564 :   if (svm_fifo_is_empty_cons (s->rx_fifo))
      87         467 :     svm_fifo_unset_event (s->rx_fifo);
      88             : 
      89        2564 :   BIO_clear_retry_flags (b);
      90             : 
      91        2564 :   return rv;
      92             : }
      93             : 
      94             : static int
      95        1044 : bio_tls_write (BIO * b, const char *in, int inl)
      96             : {
      97             :   svm_msg_q_t *mq;
      98             :   session_t *s;
      99             :   int rv;
     100             : 
     101        1044 :   if (PREDICT_FALSE (!in))
     102           0 :     return 0;
     103             : 
     104        1044 :   s = bio_session (b);
     105        1044 :   if (!s)
     106             :     {
     107           0 :       clib_warning ("no session");
     108           0 :       errno = EBADFD;
     109           0 :       return -1;
     110             :     }
     111             : 
     112        1044 :   mq = session_main_get_vpp_event_queue (s->thread_index);
     113        1044 :   rv = app_send_stream_raw (s->tx_fifo, mq, (u8 *) in, inl,
     114             :                             SESSION_IO_EVT_TX, 1 /* do_evt */ ,
     115             :                             0 /* noblock */ );
     116        1044 :   if (rv < 0)
     117             :     {
     118           0 :       BIO_set_retry_write (b);
     119           0 :       errno = EAGAIN;
     120           0 :       return -1;
     121             :     }
     122             : 
     123        1044 :   BIO_clear_retry_flags (b);
     124             : 
     125        1044 :   return rv;
     126             : }
     127             : 
     128             : long
     129          34 : bio_tls_ctrl (BIO * b, int cmd, long larg, void *ptr)
     130             : {
     131          34 :   long ret = 1;
     132             : 
     133          34 :   switch (cmd)
     134             :     {
     135           0 :     case BIO_C_SET_FD:
     136           0 :       ASSERT (0);
     137           0 :       break;
     138           0 :     case BIO_C_GET_FD:
     139           0 :       ASSERT (0);
     140           0 :       break;
     141           0 :     case BIO_CTRL_GET_CLOSE:
     142           0 :       ret = BIO_get_shutdown (b);
     143           0 :       break;
     144           0 :     case BIO_CTRL_SET_CLOSE:
     145           0 :       BIO_set_shutdown (b, (int) larg);
     146           0 :       break;
     147          14 :     case BIO_CTRL_DUP:
     148             :     case BIO_CTRL_FLUSH:
     149          14 :       ret = 1;
     150          14 :       break;
     151           4 :     case BIO_CTRL_PENDING:
     152           4 :       ret = 0;
     153           4 :       break;
     154          16 :     default:
     155          16 :       ret = 0;
     156          16 :       break;
     157             :     }
     158          34 :   return ret;
     159             : }
     160             : 
     161             : BIO *
     162           8 : BIO_new_tls (session_handle_t sh)
     163             : {
     164             :   static BIO_METHOD *tls_bio_method;
     165             :   BIO *b;
     166           8 :   if (!tls_bio_method)
     167             :     {
     168           2 :       tls_bio_method = BIO_meth_new (BIO_TYPE_SOCKET, "tls_bio");
     169           2 :       BIO_meth_set_write (tls_bio_method, bio_tls_write);
     170           2 :       BIO_meth_set_read (tls_bio_method, bio_tls_read);
     171           2 :       BIO_meth_set_create (tls_bio_method, bio_tls_alloc);
     172           2 :       BIO_meth_set_destroy (tls_bio_method, bio_tls_free);
     173           2 :       BIO_meth_set_ctrl (tls_bio_method, bio_tls_ctrl);
     174             :     }
     175           8 :   b = BIO_new (tls_bio_method);
     176             :   /* Initialize the BIO */
     177           8 :   BIO_set_data (b, uword_to_pointer (sh, void *));
     178           8 :   BIO_set_init (b, 1);
     179           8 :   return b;
     180             : }
     181             : 
     182             : /*
     183             :  * fd.io coding-style-patch-verification: ON
     184             :  *
     185             :  * Local Variables:
     186             :  * eval: (c-set-style "gnu")
     187             :  * End:
     188             :  */

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