1 /* 2 * This file is part of the openHiTLS project. 3 * 4 * openHiTLS is licensed under the Mulan PSL v2. 5 * You can use this software according to the terms and conditions of the Mulan PSL v2. 6 * You may obtain a copy of Mulan PSL v2 at: 7 * 8 * http://license.coscl.org.cn/MulanPSL2 9 * 10 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, 11 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, 12 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE. 13 * See the Mulan PSL v2 for more details. 14 */ 15 16 #ifndef RECORD_HEADER_H 17 #define RECORD_HEADER_H 18 19 #include <stdint.h> 20 21 #ifdef __cplusplus 22 extern "C" { 23 #endif 24 25 #define REC_TLS_RECORD_HEADER_LEN 5u 26 #define REC_TLS_RECORD_LENGTH_OFFSET 3 27 #define REC_TLS_SN_MAX_VALUE (~((uint64_t)0)) /* TLS sequence number wrap Threshold */ 28 29 #ifdef HITLS_TLS_PROTO_DTLS12 30 31 #define REC_IP_UDP_HEAD_SIZE 28 /* IP protocol header 20 + UDP header 8 */ 32 #define REC_DTLS_RECORD_HEADER_LEN 13 33 #define REC_DTLS_RECORD_EPOCH_OFFSET 3 34 #define REC_DTLS_RECORD_LENGTH_OFFSET 11 35 /* DTLS sequence number cannot be greater than this value. Otherwise, it will wrapped */ 36 #define REC_DTLS_SN_MAX_VALUE 0xFFFFFFFFFFFFllu 37 38 #define REC_SEQ_GET(n) ((n) & 0x0000FFFFFFFFFFFFull) 39 #define REC_EPOCH_GET(n) ((uint16_t)((n) >> 48)) 40 #define REC_EPOCHSEQ_CAL(epoch, seq) (((uint64_t)(epoch) << 48) | (seq)) 41 /* Epoch cannot be greater than this value. Otherwise, it will wrapped */ 42 #define REC_EPOCH_MAX_VALUE 0xFFFFu 43 44 #endif 45 46 typedef struct { 47 uint8_t type; 48 uint8_t reverse[3]; /* Reserved, 4-byte aligned */ 49 uint16_t version; 50 uint16_t bodyLen; /* body length */ 51 52 #ifdef HITLS_TLS_PROTO_DTLS12 53 uint64_t epochSeq; /* only for dtls */ 54 #endif 55 } RecHdr; 56 57 #ifdef __cplusplus 58 } 59 #endif 60 61 #endif /* RECORD_HEADER_H */ 62