| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "MtpRequestPacket" |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <fcntl.h> |
| |
| #include "IMtpHandle.h" |
| #include "MtpRequestPacket.h" |
| |
| #include <usbhost/usbhost.h> |
| |
| namespace android { |
| |
| MtpRequestPacket::MtpRequestPacket() |
| : MtpPacket(512), |
| mParameterCount(0) |
| { |
| } |
| |
| MtpRequestPacket::~MtpRequestPacket() { |
| } |
| |
| #ifdef MTP_DEVICE |
| int MtpRequestPacket::read(IMtpHandle *h) { |
| int ret = h->read(mBuffer, mBufferSize); |
| if (ret < 0) { |
| // file read error |
| return ret; |
| } |
| |
| // request packet should have 12 byte header followed by 0 to 5 32-bit arguments |
| const size_t read_size = static_cast<size_t>(ret); |
| if (read_size >= MTP_CONTAINER_HEADER_SIZE |
| && read_size <= MTP_CONTAINER_HEADER_SIZE + 5 * sizeof(uint32_t) |
| && ((read_size - MTP_CONTAINER_HEADER_SIZE) & 3) == 0) { |
| mPacketSize = read_size; |
| mParameterCount = (read_size - MTP_CONTAINER_HEADER_SIZE) / sizeof(uint32_t); |
| } else { |
| ALOGE("Malformed MTP request packet"); |
| ret = -1; |
| } |
| return ret; |
| } |
| #endif |
| |
| #ifdef MTP_HOST |
| // write our buffer to the given endpoint (host mode) |
| int MtpRequestPacket::write(struct usb_request *request) |
| { |
| putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize); |
| putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_COMMAND); |
| request->buffer = mBuffer; |
| request->buffer_length = mPacketSize; |
| return transfer(request); |
| } |
| #endif |
| |
| } // namespace android |