1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <nativehelper/JNIHelp.h> 20 21 #include "JniConstants.h" 22 #include "ScopedBytes.h" 23 24 /** 25 * Wrapper for managing the name and length of msghdr. 26 */ 27 class ScopedMsghdr { 28 public: ScopedMsghdr()29 ScopedMsghdr() { 30 } 31 ~ScopedMsghdr()32 ~ScopedMsghdr() { 33 if (mMsghdrValue.msg_iov) 34 free(mMsghdrValue.msg_iov); 35 if (mMsghdrValue.msg_control) 36 free(mMsghdrValue.msg_control); 37 } 38 getObject()39 struct msghdr& getObject() { 40 return mMsghdrValue; 41 } 42 setMsgNameAndLen(sockaddr * ss,socklen_t sa_len)43 void setMsgNameAndLen(sockaddr* ss, socklen_t sa_len) { 44 mMsghdrValue.msg_name = ss; 45 mMsghdrValue.msg_namelen = sa_len; 46 } 47 isNameLenValid()48 bool isNameLenValid() const { 49 if(mMsghdrValue.msg_name == NULL) { 50 return false; 51 } 52 if ((mMsghdrValue.msg_namelen != sizeof(sockaddr_in6)) && 53 (mMsghdrValue.msg_namelen != sizeof(sockaddr_in))) { 54 return false; 55 } 56 return true; 57 } 58 59 private: 60 struct msghdr mMsghdrValue = {}; 61 62 }; 63 64 65