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()29 MtpResponsePacket::MtpResponsePacket()
30     :   MtpPacket(512)
31 {
32 }
33 
~MtpResponsePacket()34 MtpResponsePacket::~MtpResponsePacket() {
35 }
36 
37 #ifdef MTP_DEVICE
write(int fd)38 int 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)47 int 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