/*
 * Proxmark send and receive commands
 *
 * Copyright (c) 2012, Roel Verdult
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the
 * names of its contributors may be used to endorse or promote products
 * derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @file cmd.c
 * @brief
 */
#include "cmd.h"

bool cmd_receive(UsbCommand* cmd) {

	// Check if there is a usb packet available
	if (!usb_poll_validate_length()) return false;

	// Try to retrieve the available command frame
	usb_read((uint8_t*)cmd, sizeof(UsbCommand));

	// (iceman) this check is wrong.  Since USB can send packages which is not sizeof(usbcommand) 544 bytes.
	//  hence, I comment it out

	// Check if the transfer was complete
	//if (rxlen != sizeof(UsbCommand)) return false;
	// Received command successfully
	//return true;
	return true;
}

bool cmd_send(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, void* data, size_t len) {

	UsbCommand txcmd;

	// 0x00 the whole command.
	for (size_t i=0; i < sizeof(UsbCommand); i++)
		((uint8_t*)&txcmd)[i] = 0x00;

	// Compose the outgoing command frame
	txcmd.cmd = cmd;
	txcmd.arg[0] = arg0;
	txcmd.arg[1] = arg1;	
	txcmd.arg[2] = arg2;

	// Add the (optional) content to the frame, with a maximum size of USB_CMD_DATA_SIZE
	if (data && len) {
		len = MIN(len, USB_CMD_DATA_SIZE);
		for (size_t i=0; i<len; i++) {
			txcmd.d.asBytes[i] = ((uint8_t*)data)[i];
		}
	}
	 
	// Send frame and make sure all bytes are transmitted
	if ( usb_write( (uint8_t*)&txcmd, sizeof(UsbCommand)) != 0)
		return false;  
	
	return true;
}