1 files changed, 71 insertions, 0 deletions
diff --git a/mtp/ffs/MtpRequestPacket.cpp b/mtp/ffs/MtpRequestPacket.cpp
new file mode 100644
index 000000000..8ef1f3c3d
--- /dev/null
+++ b/mtp/ffs/MtpRequestPacket.cpp
@@ -0,0 +1,71 @@
+/*
+ * 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 "MtpDebug.h"
+#include "MtpRequestPacket.h"
+
+#include <usbhost/usbhost.h>
+
+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 {
+		MTPE("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