lib/gnutls_constate.h

   1 /*
   2  * Copyright (C) 2000-2012 Free Software Foundation, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * The GnuTLS is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 3 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  20  *
  21  */
  22
  23 #ifndef GNUTLS_CONSTATE_H
  24 #define GNUTLS_CONSTATE_H
  25
  26 int _gnutls_epoch_set_cipher_suite (gnutls_session_t session, int epoch_rel,
  27                                     const uint8_t suite[2]);
  28 int _gnutls_epoch_set_compression (gnutls_session_t session, int epoch_rel,
  29                                    gnutls_compression_method_t comp_algo);
  30 int _gnutls_epoch_get_compression (gnutls_session_t session, int epoch_rel);
  31 void _gnutls_epoch_set_null_algos (gnutls_session_t session,
  32                                    record_parameters_st * params);
  33 int _gnutls_epoch_set_keys (gnutls_session_t session, uint16_t epoch);
  34 int _gnutls_connection_state_init (gnutls_session_t session);
  35 int _gnutls_read_connection_state_init (gnutls_session_t session);
  36 int _gnutls_write_connection_state_init (gnutls_session_t session);
  37
  38 int _gnutls_set_kx (gnutls_session_t session, gnutls_kx_algorithm_t algo);
  39
  40 int _gnutls_epoch_get (gnutls_session_t session, unsigned int epoch_rel,
  41                        record_parameters_st ** params_out);
  42 int _gnutls_epoch_alloc (gnutls_session_t session, uint16_t epoch,
  43                          record_parameters_st ** out);
  44 void _gnutls_epoch_gc (gnutls_session_t session);
  45 void _gnutls_epoch_free (gnutls_session_t session,
  46                          record_parameters_st * state);
  47
  48 static inline int _gnutls_epoch_is_valid(gnutls_session_t session, int epoch)
  49 {
  50   record_parameters_st * params;
  51   int ret;
  52
  53   ret = _gnutls_epoch_get( session, epoch, &params);
  54   if (ret < 0)
  55     return 0;
  56
  57   return 1;
  58 }
  59
  60
  61 static inline int _gnutls_epoch_refcount_inc(gnutls_session_t session, int epoch)
  62 {
  63   record_parameters_st * params;
  64   int ret;
  65
  66   ret = _gnutls_epoch_get( session, epoch, &params);
  67   if (ret < 0)
  68     return ret;
  69
  70   params->usage_cnt++;
  71
  72   return params->epoch;
  73 }
  74
  75 static inline int _gnutls_epoch_refcount_dec(gnutls_session_t session, uint16_t epoch)
  76 {
  77   record_parameters_st * params;
  78   int ret;
  79
  80   ret = _gnutls_epoch_get( session, epoch, &params);
  81   if (ret < 0)
  82     return ret;
  83
  84   params->usage_cnt--;
  85   if (params->usage_cnt < 0)
  86     return GNUTLS_E_INTERNAL_ERROR;
  87
  88   return 0;
  89 }
  90
  91 #endif