state.h

00001 /* dtls -- a very basic DTLS implementation
00002  *
00003  * Copyright (C) 2011--2013 Olaf Bergmann <bergmann@tzi.org>
00004  *
00005  * Permission is hereby granted, free of charge, to any person
00006  * obtaining a copy of this software and associated documentation
00007  * files (the "Software"), to deal in the Software without
00008  * restriction, including without limitation the rights to use, copy,
00009  * modify, merge, publish, distribute, sublicense, and/or sell copies
00010  * of the Software, and to permit persons to whom the Software is
00011  * furnished to do so, subject to the following conditions:
00012  *
00013  * The above copyright notice and this permission notice shall be
00014  * included in all copies or substantial portions of the Software.
00015  *
00016  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00017  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00018  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00019  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
00020  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
00021  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
00022  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
00023  * SOFTWARE.
00024  */
00025 
00026 /**
00027  * @file state.h
00028  * @brief state information for DTLS FSM
00029  */
00030 
00031 #ifndef _STATE_H_
00032 #define _STATE_H_
00033 
00034 #include "config.h"
00035 #include "global.h"
00036 #include "hmac.h"
00037 
00038 typedef enum { 
00039   DTLS_STATE_INIT = 0, DTLS_STATE_SERVERHELLO, DTLS_STATE_KEYEXCHANGE, 
00040   DTLS_STATE_WAIT_FINISHED, DTLS_STATE_FINISHED, 
00041   /* client states */
00042   DTLS_STATE_CLIENTHELLO, DTLS_STATE_WAIT_SERVERHELLODONE,
00043   DTLS_STATE_WAIT_SERVERFINISHED, 
00044 
00045   DTLS_STATE_CONNECTED,
00046   DTLS_STATE_CLOSING,
00047   DTLS_STATE_CLOSED,
00048 } dtls_state_t;
00049 
00050 typedef struct {
00051   uint24 mseq;           /**< handshake message sequence number counter */
00052 
00053   /** pending config that is updated during handshake */
00054   /* FIXME: dtls_security_parameters_t pending_config; */
00055 
00056   /* temporary storage for the final handshake hash */
00057   dtls_hash_ctx hs_hash;
00058 } dtls_hs_state_t;
00059 
00060 #endif /* _STATE_H_ */