diff options
Diffstat (limited to 'media/mtp/MtpServer.cpp')
| -rw-r--r-- | media/mtp/MtpServer.cpp | 688 |
1 files changed, 688 insertions, 0 deletions
diff --git a/media/mtp/MtpServer.cpp b/media/mtp/MtpServer.cpp new file mode 100644 index 0000000..30abfb8 --- /dev/null +++ b/media/mtp/MtpServer.cpp @@ -0,0 +1,688 @@ +/* + * 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. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <errno.h> + +#include <cutils/properties.h> + +#include "MtpDebug.h" +#include "MtpDatabase.h" +#include "MtpProperty.h" +#include "MtpServer.h" +#include "MtpStorage.h" +#include "MtpStringBuffer.h" + +#include <linux/usb/f_mtp.h> + +namespace android { + +static const MtpOperationCode kSupportedOperationCodes[] = { + MTP_OPERATION_GET_DEVICE_INFO, + MTP_OPERATION_OPEN_SESSION, + MTP_OPERATION_CLOSE_SESSION, + MTP_OPERATION_GET_STORAGE_IDS, + MTP_OPERATION_GET_STORAGE_INFO, + MTP_OPERATION_GET_NUM_OBJECTS, + MTP_OPERATION_GET_OBJECT_HANDLES, + MTP_OPERATION_GET_OBJECT_INFO, + MTP_OPERATION_GET_OBJECT, +// MTP_OPERATION_GET_THUMB, + MTP_OPERATION_DELETE_OBJECT, + MTP_OPERATION_SEND_OBJECT_INFO, + MTP_OPERATION_SEND_OBJECT, +// MTP_OPERATION_INITIATE_CAPTURE, +// MTP_OPERATION_FORMAT_STORE, +// MTP_OPERATION_RESET_DEVICE, +// MTP_OPERATION_SELF_TEST, +// MTP_OPERATION_SET_OBJECT_PROTECTION, +// MTP_OPERATION_POWER_DOWN, +// MTP_OPERATION_GET_DEVICE_PROP_DESC, +// MTP_OPERATION_GET_DEVICE_PROP_VALUE, +// MTP_OPERATION_SET_DEVICE_PROP_VALUE, +// MTP_OPERATION_RESET_DEVICE_PROP_VALUE, +// MTP_OPERATION_TERMINATE_OPEN_CAPTURE, +// MTP_OPERATION_MOVE_OBJECT, +// MTP_OPERATION_COPY_OBJECT, +// MTP_OPERATION_GET_PARTIAL_OBJECT, +// MTP_OPERATION_INITIATE_OPEN_CAPTURE, + MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED, +// MTP_OPERATION_GET_OBJECT_PROP_DESC, + MTP_OPERATION_GET_OBJECT_PROP_VALUE, +// MTP_OPERATION_SET_OBJECT_PROP_VALUE, + MTP_OPERATION_GET_OBJECT_REFERENCES, + MTP_OPERATION_SET_OBJECT_REFERENCES, +// MTP_OPERATION_SKIP, +}; + +static const MtpEventCode kSupportedEventCodes[] = { + MTP_EVENT_OBJECT_ADDED, + MTP_EVENT_OBJECT_REMOVED, +}; + +MtpServer::MtpServer(int fd, MtpDatabase* database, + int fileGroup, int filePerm, int directoryPerm) + : mFD(fd), + mDatabase(database), + mFileGroup(fileGroup), + mFilePermission(filePerm), + mDirectoryPermission(directoryPerm), + mSessionID(0), + mSessionOpen(false), + mSendObjectHandle(kInvalidObjectHandle), + mSendObjectFormat(0), + mSendObjectFileSize(0) +{ + initObjectProperties(); +} + +MtpServer::~MtpServer() { +} + +void MtpServer::addStorage(const char* filePath) { + int index = mStorages.size() + 1; + index |= index << 16; // set high and low part to our index + MtpStorage* storage = new MtpStorage(index, filePath, mDatabase); + addStorage(storage); +} + +MtpStorage* MtpServer::getStorage(MtpStorageID id) { + for (int i = 0; i < mStorages.size(); i++) { + MtpStorage* storage = mStorages[i]; + if (storage->getStorageID() == id) + return storage; + } + return NULL; +} + +void MtpServer::run() { + int fd = mFD; + + LOGV("MtpServer::run fd: %d\n", fd); + + while (1) { + int ret = mRequest.read(fd); + if (ret < 0) { + LOGE("request read returned %d, errno: %d", ret, errno); + if (errno == ECANCELED) { + // return to top of loop and wait for next command + continue; + } + break; + } + MtpOperationCode operation = mRequest.getOperationCode(); + MtpTransactionID transaction = mRequest.getTransactionID(); + + LOGV("operation: %s", MtpDebug::getOperationCodeName(operation)); + mRequest.dump(); + + // FIXME need to generalize this + bool dataIn = (operation == MTP_OPERATION_SEND_OBJECT_INFO + || operation == MTP_OPERATION_SET_OBJECT_REFERENCES); + if (dataIn) { + int ret = mData.read(fd); + if (ret < 0) { + LOGE("data read returned %d, errno: %d", ret, errno); + if (errno == ECANCELED) { + // return to top of loop and wait for next command + continue; + } + break; + } + LOGV("received data:"); + mData.dump(); + } else { + mData.reset(); + } + + if (handleRequest()) { + if (!dataIn && mData.hasData()) { + mData.setOperationCode(operation); + mData.setTransactionID(transaction); + LOGV("sending data:"); + mData.dump(); + ret = mData.write(fd); + if (ret < 0) { + LOGE("request write returned %d, errno: %d", ret, errno); + if (errno == ECANCELED) { + // return to top of loop and wait for next command + continue; + } + break; + } + } + + mResponse.setTransactionID(transaction); + LOGV("sending response %04X", mResponse.getResponseCode()); + ret = mResponse.write(fd); + if (ret < 0) { + LOGE("request write returned %d, errno: %d", ret, errno); + if (errno == ECANCELED) { + // return to top of loop and wait for next command + continue; + } + break; + } + } else { + LOGV("skipping response\n"); + } + } +} + +MtpProperty* MtpServer::getObjectProperty(MtpPropertyCode propCode) { + for (int i = 0; i < mObjectProperties.size(); i++) { + MtpProperty* property = mObjectProperties[i]; + if (property->getPropertyCode() == propCode) + return property; + } + return NULL; +} + +MtpProperty* MtpServer::getDeviceProperty(MtpPropertyCode propCode) { + for (int i = 0; i < mDeviceProperties.size(); i++) { + MtpProperty* property = mDeviceProperties[i]; + if (property->getPropertyCode() == propCode) + return property; + } + return NULL; +} + +void MtpServer::sendObjectAdded(MtpObjectHandle handle) { + if (mSessionOpen) { + LOGD("sendObjectAdded %d\n", handle); + mEvent.setEventCode(MTP_EVENT_OBJECT_ADDED); + mEvent.setTransactionID(mRequest.getTransactionID()); + mEvent.setParameter(1, handle); + int ret = mEvent.write(mFD); + LOGD("mEvent.write returned %d\n", ret); + } +} + +void MtpServer::sendObjectRemoved(MtpObjectHandle handle) { + if (mSessionOpen) { + LOGD("sendObjectRemoved %d\n", handle); + mEvent.setEventCode(MTP_EVENT_OBJECT_REMOVED); + mEvent.setTransactionID(mRequest.getTransactionID()); + mEvent.setParameter(1, handle); + int ret = mEvent.write(mFD); + LOGD("mEvent.write returned %d\n", ret); + } +} + +void MtpServer::initObjectProperties() { + mObjectProperties.push(new MtpProperty(MTP_PROPERTY_STORAGE_ID, MTP_TYPE_UINT32)); + mObjectProperties.push(new MtpProperty(MTP_PROPERTY_OBJECT_FORMAT, MTP_TYPE_UINT16)); + mObjectProperties.push(new MtpProperty(MTP_PROPERTY_OBJECT_SIZE, MTP_TYPE_UINT64)); + mObjectProperties.push(new MtpProperty(MTP_PROPERTY_OBJECT_FILE_NAME, MTP_TYPE_STR)); + mObjectProperties.push(new MtpProperty(MTP_PROPERTY_PARENT_OBJECT, MTP_TYPE_UINT32)); +} + +bool MtpServer::handleRequest() { + MtpOperationCode operation = mRequest.getOperationCode(); + MtpResponseCode response; + + mResponse.reset(); + + if (mSendObjectHandle != kInvalidObjectHandle && operation != MTP_OPERATION_SEND_OBJECT) { + // FIXME - need to delete mSendObjectHandle from the database + LOGE("expected SendObject after SendObjectInfo"); + mSendObjectHandle = kInvalidObjectHandle; + } + + switch (operation) { + case MTP_OPERATION_GET_DEVICE_INFO: + response = doGetDeviceInfo(); + break; + case MTP_OPERATION_OPEN_SESSION: + response = doOpenSession(); + break; + case MTP_OPERATION_CLOSE_SESSION: + response = doCloseSession(); + break; + case MTP_OPERATION_GET_STORAGE_IDS: + response = doGetStorageIDs(); + break; + case MTP_OPERATION_GET_STORAGE_INFO: + response = doGetStorageInfo(); + break; + case MTP_OPERATION_GET_OBJECT_PROPS_SUPPORTED: + response = doGetObjectPropsSupported(); + break; + case MTP_OPERATION_GET_OBJECT_HANDLES: + response = doGetObjectHandles(); + break; + case MTP_OPERATION_GET_NUM_OBJECTS: + response = doGetNumObjects(); + break; + case MTP_OPERATION_GET_OBJECT_REFERENCES: + response = doGetObjectReferences(); + break; + case MTP_OPERATION_SET_OBJECT_REFERENCES: + response = doSetObjectReferences(); + break; + case MTP_OPERATION_GET_OBJECT_PROP_VALUE: + response = doGetObjectPropValue(); + break; + case MTP_OPERATION_GET_OBJECT_INFO: + response = doGetObjectInfo(); + break; + case MTP_OPERATION_GET_OBJECT: + response = doGetObject(); + break; + case MTP_OPERATION_SEND_OBJECT_INFO: + response = doSendObjectInfo(); + break; + case MTP_OPERATION_SEND_OBJECT: + response = doSendObject(); + break; + case MTP_OPERATION_DELETE_OBJECT: + response = doDeleteObject(); + break; + case MTP_OPERATION_GET_OBJECT_PROP_DESC: + response = doGetObjectPropDesc(); + break; + default: + response = MTP_RESPONSE_OPERATION_NOT_SUPPORTED; + break; + } + + if (response == MTP_RESPONSE_TRANSACTION_CANCELLED) + return false; + mResponse.setResponseCode(response); + return true; +} + +MtpResponseCode MtpServer::doGetDeviceInfo() { + MtpStringBuffer string; + char prop_value[PROPERTY_VALUE_MAX]; + + MtpObjectFormatList* playbackFormats = mDatabase->getSupportedPlaybackFormats(); + MtpObjectFormatList* captureFormats = mDatabase->getSupportedCaptureFormats(); + MtpDevicePropertyList* deviceProperties = mDatabase->getSupportedDeviceProperties(); + + // fill in device info + mData.putUInt16(MTP_STANDARD_VERSION); + mData.putUInt32(6); // MTP Vendor Extension ID + mData.putUInt16(MTP_STANDARD_VERSION); + string.set("microsoft.com: 1.0;"); + mData.putString(string); // MTP Extensions + mData.putUInt16(0); //Functional Mode + mData.putAUInt16(kSupportedOperationCodes, + sizeof(kSupportedOperationCodes) / sizeof(uint16_t)); // Operations Supported + mData.putAUInt16(kSupportedEventCodes, + sizeof(kSupportedEventCodes) / sizeof(uint16_t)); // Events Supported + mData.putAUInt16(deviceProperties); // Device Properties Supported + mData.putAUInt16(captureFormats); // Capture Formats + mData.putAUInt16(playbackFormats); // Playback Formats + // FIXME + string.set("Google, Inc."); + mData.putString(string); // Manufacturer + + property_get("ro.product.model", prop_value, "MTP Device"); + string.set(prop_value); + mData.putString(string); // Model + string.set("1.0"); + mData.putString(string); // Device Version + + property_get("ro.serialno", prop_value, "????????"); + string.set(prop_value); + mData.putString(string); // Serial Number + + delete playbackFormats; + delete captureFormats; + delete deviceProperties; + + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doOpenSession() { + if (mSessionOpen) { + mResponse.setParameter(1, mSessionID); + return MTP_RESPONSE_SESSION_ALREADY_OPEN; + } + mSessionID = mRequest.getParameter(1); + mSessionOpen = true; + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doCloseSession() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + mSessionID = 0; + mSessionOpen = false; + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doGetStorageIDs() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + + int count = mStorages.size(); + mData.putUInt32(count); + for (int i = 0; i < count; i++) + mData.putUInt32(mStorages[i]->getStorageID()); + + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doGetStorageInfo() { + MtpStringBuffer string; + + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + MtpStorageID id = mRequest.getParameter(1); + MtpStorage* storage = getStorage(id); + if (!storage) + return MTP_RESPONSE_INVALID_STORAGE_ID; + + mData.putUInt16(storage->getType()); + mData.putUInt16(storage->getFileSystemType()); + mData.putUInt16(storage->getAccessCapability()); + mData.putUInt64(storage->getMaxCapacity()); + mData.putUInt64(storage->getFreeSpace()); + mData.putUInt32(1024*1024*1024); // Free Space in Objects + string.set(storage->getDescription()); + mData.putString(string); + mData.putEmptyString(); // Volume Identifier + + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doGetObjectPropsSupported() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + MtpObjectFormat format = mRequest.getParameter(1); + MtpDevicePropertyList* properties = mDatabase->getSupportedObjectProperties(format); + mData.putAUInt16(properties); + delete properties; + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doGetObjectHandles() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + MtpStorageID storageID = mRequest.getParameter(1); // 0xFFFFFFFF for all storage + MtpObjectFormat format = mRequest.getParameter(2); // 0 for all formats + MtpObjectHandle parent = mRequest.getParameter(3); // 0xFFFFFFFF for objects with no parent + // 0x00000000 for all objects? + if (parent == 0xFFFFFFFF) + parent = 0; + + MtpObjectHandleList* handles = mDatabase->getObjectList(storageID, format, parent); + mData.putAUInt32(handles); + delete handles; + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doGetNumObjects() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + MtpStorageID storageID = mRequest.getParameter(1); // 0xFFFFFFFF for all storage + MtpObjectFormat format = mRequest.getParameter(2); // 0 for all formats + MtpObjectHandle parent = mRequest.getParameter(3); // 0xFFFFFFFF for objects with no parent + // 0x00000000 for all objects? + if (parent == 0xFFFFFFFF) + parent = 0; + + int count = mDatabase->getNumObjects(storageID, format, parent); + if (count >= 0) { + mResponse.setParameter(1, count); + return MTP_RESPONSE_OK; + } else { + mResponse.setParameter(1, 0); + return MTP_RESPONSE_INVALID_OBJECT_HANDLE; + } +} + +MtpResponseCode MtpServer::doGetObjectReferences() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + MtpStorageID handle = mRequest.getParameter(1); + MtpObjectHandleList* handles = mDatabase->getObjectReferences(handle); + if (!handles) { + mData.putEmptyArray(); + return MTP_RESPONSE_INVALID_OBJECT_HANDLE; + } + mData.putAUInt32(handles); + delete handles; + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doSetObjectReferences() { + if (!mSessionOpen) + return MTP_RESPONSE_SESSION_NOT_OPEN; + MtpStorageID handle = mRequest.getParameter(1); + MtpObjectHandleList* references = mData.getAUInt32(); + MtpResponseCode result = mDatabase->setObjectReferences(handle, references); + delete references; + return result; +} + +MtpResponseCode MtpServer::doGetObjectPropValue() { + MtpObjectHandle handle = mRequest.getParameter(1); + MtpObjectProperty property = mRequest.getParameter(2); + + return mDatabase->getObjectProperty(handle, property, mData); +} + +MtpResponseCode MtpServer::doGetObjectInfo() { + MtpObjectHandle handle = mRequest.getParameter(1); + return mDatabase->getObjectInfo(handle, mData); +} + +MtpResponseCode MtpServer::doGetObject() { + MtpObjectHandle handle = mRequest.getParameter(1); + MtpString pathBuf; + int64_t fileLength; + int result = mDatabase->getObjectFilePath(handle, pathBuf, fileLength); + if (result != MTP_RESPONSE_OK) + return result; + + const char* filePath = (const char *)pathBuf; + mtp_file_range mfr; + mfr.fd = open(filePath, O_RDONLY); + if (mfr.fd < 0) { + return MTP_RESPONSE_GENERAL_ERROR; + } + mfr.offset = 0; + mfr.length = fileLength; + + // send data header + mData.setOperationCode(mRequest.getOperationCode()); + mData.setTransactionID(mRequest.getTransactionID()); + mData.writeDataHeader(mFD, fileLength); + + // then transfer the file + int ret = ioctl(mFD, MTP_SEND_FILE, (unsigned long)&mfr); + close(mfr.fd); + if (ret < 0) { + if (errno == ECANCELED) + return MTP_RESPONSE_TRANSACTION_CANCELLED; + else + return MTP_RESPONSE_GENERAL_ERROR; + } + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doSendObjectInfo() { + MtpString path; + MtpStorageID storageID = mRequest.getParameter(1); + MtpStorage* storage = getStorage(storageID); + MtpObjectHandle parent = mRequest.getParameter(2); + if (!storage) + return MTP_RESPONSE_INVALID_STORAGE_ID; + + // special case the root + if (parent == MTP_PARENT_ROOT) { + path = storage->getPath(); + parent = 0; + } else { + int64_t dummy; + int result = mDatabase->getObjectFilePath(parent, path, dummy); + if (result != MTP_RESPONSE_OK) + return result; + } + + // read only the fields we need + mData.getUInt32(); // storage ID + MtpObjectFormat format = mData.getUInt16(); + mData.getUInt16(); // protection status + mSendObjectFileSize = mData.getUInt32(); + mData.getUInt16(); // thumb format + mData.getUInt32(); // thumb compressed size + mData.getUInt32(); // thumb pix width + mData.getUInt32(); // thumb pix height + mData.getUInt32(); // image pix width + mData.getUInt32(); // image pix height + mData.getUInt32(); // image bit depth + mData.getUInt32(); // parent + uint16_t associationType = mData.getUInt16(); + uint32_t associationDesc = mData.getUInt32(); // association desc + mData.getUInt32(); // sequence number + MtpStringBuffer name, created, modified; + mData.getString(name); // file name + mData.getString(created); // date created + mData.getString(modified); // date modified + // keywords follow + + time_t modifiedTime; + if (!parseDateTime(modified, modifiedTime)) + modifiedTime = 0; + + if (path[path.size() - 1] != '/') + path += "/"; + path += (const char *)name; + + MtpObjectHandle handle = mDatabase->beginSendObject((const char*)path, + format, parent, storageID, mSendObjectFileSize, modifiedTime); + if (handle == kInvalidObjectHandle) { + return MTP_RESPONSE_GENERAL_ERROR; + } + + if (format == MTP_FORMAT_ASSOCIATION) { + mode_t mask = umask(0); + int ret = mkdir((const char *)path, mDirectoryPermission); + umask(mask); + if (ret && ret != -EEXIST) + return MTP_RESPONSE_GENERAL_ERROR; + chown((const char *)path, getuid(), mFileGroup); + } else { + mSendObjectFilePath = path; + // save the handle for the SendObject call, which should follow + mSendObjectHandle = handle; + mSendObjectFormat = format; + } + + mResponse.setParameter(1, storageID); + mResponse.setParameter(2, (parent == 0 ? 0xFFFFFFFF: parent)); + mResponse.setParameter(3, handle); + + return MTP_RESPONSE_OK; +} + +MtpResponseCode MtpServer::doSendObject() { + MtpResponseCode result = MTP_RESPONSE_OK; + mode_t mask; + int ret; + + if (mSendObjectHandle == kInvalidObjectHandle) { + LOGE("Expected SendObjectInfo before SendObject"); + result = MTP_RESPONSE_NO_VALID_OBJECT_INFO; + goto done; + } + + // read the header + ret = mData.readDataHeader(mFD); + // FIXME - check for errors here. + + // reset so we don't attempt to send this back + mData.reset(); + + mtp_file_range mfr; + mfr.fd = open(mSendObjectFilePath, O_RDWR | O_CREAT | O_TRUNC); + if (mfr.fd < 0) { + result = MTP_RESPONSE_GENERAL_ERROR; + goto done; + } + fchown(mfr.fd, getuid(), mFileGroup); + // set permissions + mask = umask(0); + fchmod(mfr.fd, mFilePermission); + umask(mask); + + mfr.offset = 0; + mfr.length = mSendObjectFileSize; + + // transfer the file + ret = ioctl(mFD, MTP_RECEIVE_FILE, (unsigned long)&mfr); + close(mfr.fd); + + LOGV("MTP_RECEIVE_FILE returned %d", ret); + + if (ret < 0) { + unlink(mSendObjectFilePath); + if (errno == ECANCELED) + result = MTP_RESPONSE_TRANSACTION_CANCELLED; + else + result = MTP_RESPONSE_GENERAL_ERROR; + } + +done: + mDatabase->endSendObject(mSendObjectFilePath, mSendObjectHandle, mSendObjectFormat, + result == MTP_RESPONSE_OK); + mSendObjectHandle = kInvalidObjectHandle; + mSendObjectFormat = 0; + return result; +} + +MtpResponseCode MtpServer::doDeleteObject() { + MtpObjectHandle handle = mRequest.getParameter(1); + MtpObjectFormat format = mRequest.getParameter(1); + // FIXME - support deleting all objects if handle is 0xFFFFFFFF + // FIXME - implement deleting objects by format + // FIXME - handle non-empty directories + + MtpString filePath; + int64_t fileLength; + int result = mDatabase->getObjectFilePath(handle, filePath, fileLength); + if (result == MTP_RESPONSE_OK) { + LOGV("deleting %s", (const char *)filePath); + // one of these should work + rmdir((const char *)filePath); + unlink((const char *)filePath); + return mDatabase->deleteFile(handle); + } else { + return result; + } +} + +MtpResponseCode MtpServer::doGetObjectPropDesc() { + MtpObjectProperty propCode = mRequest.getParameter(1); + MtpObjectFormat format = mRequest.getParameter(2); + MtpProperty* property = getObjectProperty(propCode); + if (!property) + return MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED; + + property->write(mData); + return MTP_RESPONSE_OK; +} + +} // namespace android |