1 /* 2 * Copyright (C) 2010 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 #define LOG_TAG "MtpResponsePacket" 18 19 #include <stdio.h> 20 #include <sys/types.h> 21 #include <fcntl.h> 22 23 #include "MtpResponsePacket.h" 24 25 #include <usbhost/usbhost.h> 26 27 namespace android { 28 MtpResponsePacket()29MtpResponsePacket::MtpResponsePacket() 30 : MtpPacket(512) 31 { 32 } 33 ~MtpResponsePacket()34MtpResponsePacket::~MtpResponsePacket() { 35 } 36 37 #ifdef MTP_DEVICE write(int fd)38int MtpResponsePacket::write(int fd) { 39 putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize); 40 putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_RESPONSE); 41 int ret = ::write(fd, mBuffer, mPacketSize); 42 return (ret < 0 ? ret : 0); 43 } 44 #endif 45 46 #ifdef MTP_HOST read(struct usb_request * request)47int MtpResponsePacket::read(struct usb_request *request) { 48 request->buffer = mBuffer; 49 request->buffer_length = mBufferSize; 50 int ret = transfer(request); 51 if (ret >= 0) 52 mPacketSize = ret; 53 else 54 mPacketSize = 0; 55 return ret; 56 } 57 #endif 58 59 } // namespace android 60 61