MtpRequestPacket.cpp revision b14e588bec4d5e39e61b020b5b575f2ce555d316
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 "MtpRequestPacket" 18 19#include <stdio.h> 20#include <sys/types.h> 21#include <fcntl.h> 22 23#include "MtpRequestPacket.h" 24 25namespace android { 26 27MtpRequestPacket::MtpRequestPacket() 28 : MtpPacket(512) 29{ 30} 31 32MtpRequestPacket::~MtpRequestPacket() { 33} 34 35#ifdef MTP_DEVICE 36int MtpRequestPacket::read(int fd) { 37 int ret = ::read(fd, mBuffer, mBufferSize); 38 if (ret >= 0) 39 mPacketSize = ret; 40 else 41 mPacketSize = 0; 42 return ret; 43} 44#endif 45 46#ifdef MTP_HOST 47 // write our buffer to the given endpoint (host mode) 48int MtpRequestPacket::write(struct usb_endpoint *ep) 49{ 50 putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize); 51 putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_COMMAND); 52 return transfer(ep, mBuffer, mPacketSize); 53} 54#endif 55 56} // namespace android 57