1 /* dtls -- a very basic DTLS implementation 2 * 3 * Copyright (C) 2011--2013 Olaf Bergmann <bergmann@tzi.org> 4 * 5 * Permission is hereby granted, free of charge, to any person 6 * obtaining a copy of this software and associated documentation 7 * files (the "Software"), to deal in the Software without 8 * restriction, including without limitation the rights to use, copy, 9 * modify, merge, publish, distribute, sublicense, and/or sell copies 10 * of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be 14 * included in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 23 * SOFTWARE. 24 */ 25 26 /** 27 * @file state.h 28 * @brief state information for DTLS FSM 29 */ 30 31 #ifndef _DTLS_STATE_H_ 32 #define _DTLS_STATE_H_ 33 34 #include <sys/types.h> 35 #include <stdint.h> 36 37 #include "global.h" 38 #include "hmac.h" 39 40 typedef enum { 41 DTLS_STATE_INIT = 0, DTLS_STATE_WAIT_CLIENTHELLO, DTLS_STATE_WAIT_CLIENTCERTIFICATE, 42 DTLS_STATE_WAIT_CLIENTKEYEXCHANGE, DTLS_STATE_WAIT_CERTIFICATEVERIFY, 43 DTLS_STATE_WAIT_CHANGECIPHERSPEC, 44 DTLS_STATE_WAIT_FINISHED, DTLS_STATE_FINISHED, 45 /* client states */ 46 DTLS_STATE_CLIENTHELLO, DTLS_STATE_WAIT_SERVERCERTIFICATE, DTLS_STATE_WAIT_SERVERKEYEXCHANGE, 47 DTLS_STATE_WAIT_SERVERHELLODONE, 48 49 DTLS_STATE_CONNECTED, 50 DTLS_STATE_CLOSING, 51 DTLS_STATE_CLOSED 52 } dtls_state_t; 53 54 typedef struct { 55 uint16_t mseq_s; /**< send handshake message sequence number counter */ 56 uint16_t mseq_r; /**< received handshake message sequence number counter */ 57 58 /** pending config that is updated during handshake */ 59 /* FIXME: dtls_security_parameters_t pending_config; */ 60 61 /* temporary storage for the final handshake hash */ 62 dtls_hash_ctx hs_hash; 63 } dtls_hs_state_t; 64 #endif /* _DTLS_STATE_H_ */ 65
