/*
 *
 *    Copyright (c) 2012-2014 Nest Labs, Inc.
 *    All rights reserved.
 *
 *    This document is the property of Nest. It is considered
 *    confidential and proprietary information.
 *
 *    This document may not be reproduced or transmitted in any form,
 *    in whole or in part, without the express written permission of
 *    Nest.
 *
 */

/**
 *    @file
 *      This file describes compile-time constants used for
 *      configuring LwIP.
 *
 */

/*
 * Copyright 2012, Broadcom Corporation
 * All Rights Reserved.
 *
 * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Broadcom Corporation;
 * the contents of this file may not be disclosed to third parties, copied
 * or duplicated in any form, in whole or in part, without the prior
 * written permission of Broadcom Corporation.
 */

/*
 * Copyright (c) 2001-2003 Swedish Institute of Computer Science.
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission. 
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * This file is part of the lwIP TCP/IP stack.
 * 
 * Author: Adam Dunkels <adam@sics.se>
 *
 */
#ifndef __T2SIM_LWIPOPTS_H__
#define __T2SIM_LWIPOPTS_H__

#include <stdlib.h>

#include "common/lwipopts.h"
#include "nlertaskpriority.h"

#ifdef CUSTOM_LWIPOPTS
#include "custom_lwipopts.h"
#else /* ifdef CUSTOM_LWIPOPTS */


/**
 * MEM_ALIGNMENT: should be set to the alignment of the CPU
 *    4 byte alignment -> #define MEM_ALIGNMENT 4
 *    2 byte alignment -> #define MEM_ALIGNMENT 2
 */
#define MEM_ALIGNMENT                  (4)

/**
 * MEMP_NUM_NETBUF: the number of struct netbufs.
 * (only needed if you use the sequential API, like api_lib.c)
 */
#define MEMP_NUM_NETBUF                (PBUF_POOL_SIZE)


/**
 * MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP segments.
 * (requires the LWIP_TCP option)
 */
#define MEMP_NUM_TCP_SEG               (TCP_SND_QUEUELEN+1)

/**
 * PBUF_POOL_SIZE: the number of buffers in the pbuf pool.
 *
 * This is just a default designed to be overriden by the FreeRTOS.mk makefile
 * To perform this override, define the makefile variable LWIP_NUM_PACKET_BUFFERS_IN_POOL
 */
#ifndef PBUF_POOL_SIZE
#define PBUF_POOL_SIZE                 (12)
#endif

/*
 * IP_REASS_MAX_PBUFS: Total maximum amount of pbufs waiting to be reassembled.
 * Since the received pbufs are enqueued, be sure to configure
 * PBUF_POOL_SIZE > IP_REASS_MAX_PBUFS so that the stack is still able to receive
 * packets even if the maximum amount of fragments is enqueued for reassembly!
 *
 */
#if PBUF_POOL_SIZE > 2
#ifndef IP_REASS_MAX_PBUFS
#define IP_REASS_MAX_PBUFS              (PBUF_POOL_SIZE - 2)
#endif
#else
#define IP_REASS_MAX_PBUFS              0
#define IP_REASSEMBLY                   0
#endif

/**
 * MEMP_NUM_REASSDATA: the number of IP packets simultaneously queued for
 * reassembly (whole packets, not fragments!)
 */
#if IP_REASS_MAX_PBUFS > 1
#ifndef MEMP_NUM_REASSDATA
#define MEMP_NUM_REASSDATA              (IP_REASS_MAX_PBUFS - 1)
#endif
#else
#define MEMP_NUM_REASSDATA              0
#endif


/**
 * PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. The default is
 * designed to accomodate single full size TCP frame in one pbuf, including
 * TCP_MSS, IP header, and link header.
 */
// Make a bigger pbuf, wifi passthru wants a 0x624
#define PBUF_SIZE 0x640
//#define PBUF_POOL_BUFSIZE              (LWIP_MEM_ALIGN_SIZE(WICED_LINK_MTU) + LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf)) + 1)
#define PBUF_POOL_BUFSIZE              (LWIP_MEM_ALIGN_SIZE(PBUF_SIZE) + LWIP_MEM_ALIGN_SIZE(sizeof(struct pbuf)) + 1)


/**
 * TCP_MSS: TCP Maximum segment size. (default is 536, a conservative default,
 * you might want to increase this.)
 * For the receive side, this MSS is advertised to the remote side
 * when opening a connection. For the transmit size, this MSS sets
 * an upper limit on the MSS advertised by the remote host.
 */
/* *** IMPORTANT ***
 *
 * DO NOT increase this beyond the point at which a TCP segement will fit within a single PBUF, otherwise
 * the code in the WICED netif output function (host_hardware_output() in wiced-network.cpp) will fail.
 *
 * The limit is effectively WICED_LINK_MTU - (WICED_LINK_OVERHEAD_BELOW_ETHERNET_FRAME + WICED_ETHERNET_SIZE + 60)
 */
#define TCP_MSS                        (1152)


/**
 * TCP_SND_BUF: TCP sender buffer space (bytes).
 * must be at least as much as (2 * TCP_MSS) for things to work smoothly
 */
#define TCP_SND_BUF                    (6 * TCP_MSS)

/**
 * ETH_PAD_SIZE: the header space required preceeding the of each pbuf in the pbuf pool. The default is
 * designed to accomodate single full size TCP frame in one pbuf, including
 * TCP_MSS, IP header, and link header.
 *
 * This is zero since the role has been taken over by SUB_ETHERNET_HEADER_SPACE as ETH_PAD_SIZE was not always obeyed
 */
#define ETH_PAD_SIZE                   (0)

#define SUB_ETHERNET_HEADER_SPACE      (8 + 12 + 4 + 2)


/**
 * TCPIP_THREAD_STACKSIZE: The stack size used by the main tcpip thread.
 * The stack size value itself is platform-dependent, but is passed to
 * sys_thread_new() when the thread is created.
 */
#define TCPIP_THREAD_STACKSIZE         (1300)


/**
 * TCPIP_THREAD_PRIO: The priority assigned to the main tcpip thread.
 * The priority value itself is platform-dependent, but is passed to
 * sys_thread_new() when the thread is created.
 * Note: If this task priority is modified, please update the comment in nlenvironment-common.h
 */
#define TCPIP_THREAD_PRIO              ((NLER_TASK_PRIORITY_HIGHEST)-4)     //5

#define TCP_LISTEN_BACKLOG     (1)


/**
 * The WICED definition of PBUF_POOL_BUFSIZE includes a number of
 * sizeof() instantiations which causes the C preprocessor to
 * fail. Disable TCP configuration constant sanity checks to work
 * around this.
 */
#define LWIP_DISABLE_TCP_SANITY_CHECKS (1)

/**
 * The maximum of all used hardware address lengths across all types
 * of interfaces in use:
 *
 *   - 802.11   : 6
 *   - 802.15.4 : 8
 */
#define NETIF_MAX_HWADDR_LEN			8U

#define LWIP_NOASSERT 1

#undef LWIP_TEST_CODE
#define LWIP_TEST_CODE 1

#endif /* ifdef CUSTOM_LWIPOPTS */

#endif /* __T2SIM_LWIPOPTS_H__ */