MtpRequestPacket.cpp revision 7850ef999740f214a1990a9c090d3f3865d435aa 
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#include <stdio.h>
18#include <sys/types.h>
19#include <fcntl.h>
20
21#include "MtpRequestPacket.h"
22
23namespace android {
24
25MtpRequestPacket::MtpRequestPacket()
26    :   MtpPacket(512)
27{
28}
29
30MtpRequestPacket::~MtpRequestPacket() {
31}
32
33#ifdef MTP_DEVICE
34int MtpRequestPacket::read(int fd) {
35    int ret = ::read(fd, mBuffer, mBufferSize);
36    if (ret >= 0)
37        mPacketSize = ret;
38    else
39        mPacketSize = 0;
40    return ret;
41}
42#endif
43
44#ifdef MTP_HOST
45    // write our buffer to the given endpoint (host mode)
46int MtpRequestPacket::write(struct usb_endpoint *ep)
47{
48    putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
49    putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_COMMAND);
50    return transfer(ep, mBuffer, mPacketSize);
51}
52#endif
53
54}  // namespace android
55