1 /* 2 * Copyright (C) 2016 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 #ifndef _MTP_FFS_HANDLE_H 18 #define _MTP_FFS_HANDLE_H 19 20 #include <android-base/unique_fd.h> 21 #include <IMtpHandle.h> 22 23 namespace android { 24 25 class MtpFfsHandleTest; 26 27 class MtpFfsHandle : public IMtpHandle { 28 friend class android::MtpFfsHandleTest; 29 private: 30 int writeHandle(int fd, const void *data, int len); 31 int readHandle(int fd, void *data, int len); 32 int spliceReadHandle(int fd, int fd_out, int len); 33 bool initFunctionfs(); 34 void closeConfig(); 35 void closeEndpoints(); 36 37 bool mPtp; 38 39 std::timed_mutex mLock; 40 41 android::base::unique_fd mControl; 42 // "in" from the host's perspective => sink for mtp server 43 android::base::unique_fd mBulkIn; 44 // "out" from the host's perspective => source for mtp server 45 android::base::unique_fd mBulkOut; 46 android::base::unique_fd mIntr; 47 48 int mMaxWrite; 49 int mMaxRead; 50 51 std::vector<char> mBuffer1; 52 std::vector<char> mBuffer2; 53 54 public: 55 int read(void *data, int len); 56 int write(const void *data, int len); 57 58 int receiveFile(mtp_file_range mfr, bool zero_packet); 59 int sendFile(mtp_file_range mfr); 60 int sendEvent(mtp_event me); 61 62 /** 63 * Open ffs endpoints and allocate necessary kernel and user memory. 64 * Will sleep until endpoints are enabled, for up to 1 second. 65 */ 66 int start(); 67 void close(); 68 69 int configure(bool ptp); 70 71 MtpFfsHandle(); 72 ~MtpFfsHandle(); 73 }; 74 75 struct mtp_data_header { 76 /* length of packet, including this header */ 77 __le32 length; 78 /* container type (2 for data packet) */ 79 __le16 type; 80 /* MTP command code */ 81 __le16 command; 82 /* MTP transaction ID */ 83 __le32 transaction_id; 84 }; 85 86 } // namespace android 87 88 #endif // _MTP_FF_HANDLE_H 89 90
