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 void doSendEvent(mtp_event me); 37 38 void controlLoop(); 39 int handleEvent(); 40 int handleControlRequest(const struct usb_ctrlrequest *setup); 41 42 bool mPtp; 43 44 std::timed_mutex mLock; 45 46 android::base::unique_fd mControl; 47 // "in" from the host's perspective => sink for mtp server 48 android::base::unique_fd mBulkIn; 49 // "out" from the host's perspective => source for mtp server 50 android::base::unique_fd mBulkOut; 51 android::base::unique_fd mIntr; 52 53 int mMaxWrite; 54 int mMaxRead; 55 56 std::vector<char> mBuffer1; 57 std::vector<char> mBuffer2; 58 59 public: 60 int read(void *data, int len); 61 int write(const void *data, int len); 62 63 int receiveFile(mtp_file_range mfr, bool zero_packet); 64 int sendFile(mtp_file_range mfr); 65 int sendEvent(mtp_event me); 66 67 /** 68 * Open ffs endpoints and allocate necessary kernel and user memory. 69 * Will sleep until endpoints are enabled, for up to 1 second. 70 */ 71 int start(); 72 void close(); 73 74 int configure(bool ptp); 75 76 MtpFfsHandle(); 77 ~MtpFfsHandle(); 78 }; 79 80 struct mtp_data_header { 81 /* length of packet, including this header */ 82 __le32 length; 83 /* container type (2 for data packet) */ 84 __le16 type; 85 /* MTP command code */ 86 __le16 command; 87 /* MTP transaction ID */ 88 __le32 transaction_id; 89 }; 90 91 } // namespace android 92 93 #endif // _MTP_FF_HANDLE_H 94 95
