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 2.1 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_epoch_get(gnutls_session_t session, unsigned int epoch_rel,
  39                       record_parameters_st ** params_out);
  40 int _gnutls_epoch_alloc(gnutls_session_t session, uint16_t epoch,
  41                         record_parameters_st ** out);
  42 void _gnutls_epoch_gc(gnutls_session_t session);
  43 void _gnutls_epoch_free(gnutls_session_t session,
  44                         record_parameters_st * state);
  45
  46 static inline int _gnutls_epoch_is_valid(gnutls_session_t session,
  47                                          int epoch)
  48 {
  49         record_parameters_st *params;
  50         int ret;
  51
  52         ret = _gnutls_epoch_get(session, epoch, &params);
  53         if (ret < 0)
  54                 return 0;
  55
  56         return 1;
  57 }
  58
  59
  60 static inline int _gnutls_epoch_refcount_inc(gnutls_session_t session,
  61                                              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,
  76                                              uint16_t epoch)
  77 {
  78         record_parameters_st *params;
  79         int ret;
  80
  81         ret = _gnutls_epoch_get(session, epoch, &params);
  82         if (ret < 0)
  83                 return ret;
  84
  85         params->usage_cnt--;
  86         if (params->usage_cnt < 0)
  87                 return GNUTLS_E_INTERNAL_ERROR;
  88
  89         return 0;
  90 }
  91
  92 #endif