1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef SOFTBUS_SEQUENCE_VERIFICATION_H 17 #define SOFTBUS_SEQUENCE_VERIFICATION_H 18 19 #include "softbus_def.h" 20 21 #ifdef __cplusplus 22 #if __cplusplus 23 extern "C" { 24 #endif 25 #endif 26 27 /* when receive seq < minSeq, the package is duplicated. 28 when receive seq == minSeq, update minSeq. 29 when minSeq < receive seq < maxSeq, Check whether duplicate package exist, record the package in bitmap. 30 when receive seq >= maxSeq, update maxSeq, record the package in bitmap. 31 */ 32 typedef struct { 33 int32_t maxSeq; 34 int32_t minSeq; 35 uint64_t recvBitmap; 36 } SeqVerifyInfo; 37 38 /* When the received package is an ACK packet, this function does not need to be called for verification. */ 39 bool IsPassSeqCheck(SeqVerifyInfo *seqVerifyInfo, int32_t recvSeq); 40 41 #ifdef __cplusplus 42 #if __cplusplus 43 } 44 #endif /* __cplusplus */ 45 #endif /* __cplusplus */ 46 47 #endif // !SOFTBUS_SEQUENCE_VERIFICATION_H 48