text: /*
   * Copyright 2020-2021 AVSystem <avsystem@avsystem.com>
   *
   * 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.
   */
  
  /*
   * 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: Simon Goldschmidt
   *
   */
  #ifndef __LWIPOPTS_H__
  #    define __LWIPOPTS_H__
  
  #    include "plf_config.h"
  /* PPP SUPPORT */
  #    define PPP_SUPPORT 1
  #    define PPPOS_SUPPORT 1
  #    define PPP_SERVER 1
  #    define PPP_DEBUG 0
  
  #    define LWIP_ARP 0
  #    define PAP_SUPPORT 1
  
  #    define PPP_NOTIFY_PHASE 1
  #    define MEMP_NUM_PPP_PCB 2
  
  #    define LWIP_COMPAT_MUTEX_ALLOWED 1
  
  #    define LWIP_DNS 1
  #    define LWIP_SO_SNDTIMEO 1
  #    define LWIP_SO_RCVTIMEO 1
  #    define LWIP_SO_SNDRCVTIMEO_NONSTANDARD 1
  #    define LWIP_SO_RCVRCVTIMEO_NONSTANDARD 1
  
  #    define LWIP_TCP_KEEPALIVE \
          1 /* Keep the TCP link active. Important for MQTT/TLS */
  #    define LWIP_RANDOMIZE_INITIAL_LOCAL_PORTS \
          1 // Prevent the same port to be used after reset. Otherwise, the remote
            // host may be confused if the port was not explicitly closed before
            // the reset.
  
  /* #define PPPDEBUG */
  
  #    define ETHARP_TRUST_IP_MAC 0
  #    define IP_REASSEMBLY 0
  #    define IP_FRAG 0
  #    define ARP_QUEUEING 0
  #    define TCP_LISTEN_BACKLOG 1
  
  /**
   * NO_SYS==1: Provides VERY minimal functionality. Otherwise,
   * use lwIP facilities.
   */
  #    define NO_SYS 0
  
  /**
   * Set this to 1 if you want to free PBUF_RAM pbufs (or call mem_free()) from
   * interrupt context (or another context that doesn't allow waiting for a
   * semaphore).
   * If set to 1, mem_malloc will be protected by a semaphore and
   * SYS_ARCH_PROTECT, while mem_free will only use SYS_ARCH_PROTECT. mem_malloc
   * SYS_ARCH_UNPROTECTs with each loop so that mem_free can run.
   *
   * ATTENTION: As you can see from the above description, this leads to dis-/
   * enabling interrupts often, which can be slow! Also, on low memory, mem_malloc
   * can need longer.
   *
   * If you don't want that, at least for NO_SYS=0, you can still use the
   * following functions to enqueue a deallocation call which then runs in the
   * tcpip_thread context:
   * - pbuf_free_callback(p);
   * - mem_free_callback(m);
   */
  #    define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 1
  
  /**
   * LWIP_TCPIP_CORE_LOCKING_INPUT: when LWIP_TCPIP_CORE_LOCKING is enabled,
   * this lets tcpip_input() grab the mutex for input packets as well,
   * instead of allocating a message and passing it to tcpip_thread.
   *
   * ATTENTION: this does not work when tcpip_input() is called from
   * interrupt context!
   */
  #    define LWIP_TCPIP_CORE_LOCKING_INPUT 1
  
  /**
   * LWIP_TCPIP_CORE_LOCKING
   * Creates a global mutex that is held during TCPIP thread operations.
   * Can be locked by client code to perform lwIP operations without changing
   * into TCPIP thread using callbacks. See LOCK_TCPIP_CORE() and
   * UNLOCK_TCPIP_CORE().
   * Your system should provide mutexes supporting priority inversion to use this.
   */
  #    define LWIP_TCPIP_CORE_LOCKING 1
  
  /**
   * SYS_LIGHTWEIGHT_PROT==1: enable inter-task protection (and task-vs-interrupt
   * protection) for certain critical regions during buffer allocation,
   * deallocation and memory allocation and deallocation. ATTENTION: This is
   * required when using lwIP from more than one context! If you disable this, you
   * must be sure what you are doing!
   */
  #    define SYS_LIGHTWEIGHT_PROT 1
  
  /* ---------- Memory options ---------- */
  /* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
     lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to 4, 2
     byte alignment -> define MEM_ALIGNMENT to 2. */
  #    define MEM_ALIGNMENT 4
  
  /* MEM_SIZE: the size of the heap memory. If the application will send
  a lot of data that needs to be copied, this should be set high. */
  /* #define MEM_SIZE                (15 *1024) */
  #    define MEM_SIZE (10 * 1024)
  
  /* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
     sends a lot of data out of ROM (or other static memory), this
     should be set high. */
  #    define MEMP_NUM_PBUF 10
  /* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
     per active UDP "connection". */
  #    define MEMP_NUM_UDP_PCB 2 /* needed for DNS */
  /* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
     connections. */
  #    define MEMP_NUM_TCP_PCB 2 /* needed for HTTP Client */
  /**
   * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
   * (requires the LWIP_RAW option)
   */
  #    define MEMP_NUM_RAW_PCB 2 /* needed for Ping */
  /* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
     connections. */
  #    define MEMP_NUM_TCP_PCB_LISTEN 0 /* No TCP PCB Server */
  /* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
     segments. */
  #    define MEMP_NUM_TCP_SEG 12
  /* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
     timeouts. */
  #    define MEMP_NUM_SYS_TIMEOUT 10
  
  /* ---------- Pbuf options ---------- */
  /* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
  #    define PBUF_POOL_SIZE 12
  
  /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
  #    define PBUF_POOL_BUFSIZE 512
  
  /* ---------- TCP options ---------- */
  #    define LWIP_TCP 1
  #    define TCP_TTL 255
  
  /* Controls if TCP should queue segments that arrive out of
     order. Define to 0 if your device is low on memory. */
  #    define TCP_QUEUE_OOSEQ 0
  
  /* TCP Maximum segment size. */
  #    define TCP_MSS \
          (1500 - 40) // TCP_MSS = (Ethernet MTU - IP header size - TCP header
                      // size)
  
  /* TCP sender buffer space (bytes). */
  #    define TCP_SND_BUF (4 * TCP_MSS)
  
  /*  TCP_SND_QUEUELEN: TCP sender buffer space (pbufs).
    This must be at least as much as (2 *
    TCP_SND_BUF/TCP_MSS) for things to work. */
  
  #    define TCP_SND_QUEUELEN (2 * TCP_SND_BUF / TCP_MSS)
  
  /* TCP receive window. */
  #    define TCP_WND (2 * TCP_MSS)
  
  #    define TCP_MSL 6000UL /* The maximum segment lifetime in milliseconds */
  
  /* ---------- ICMP options ---------- */
  #    define LWIP_SO_RCVTIMEO 1 /* ICPM PING */
  #    define LWIP_ICMP 1
  #    define LWIP_RAW 1                  /* PING changed to 1 */
  #    define DEFAULT_RAW_RECVMBOX_SIZE 3 /* for ICMP PING */
  
  /* ---------- DHCP options ---------- */
  /* Define LWIP_DHCP to 1 if you want DHCP configuration
     of interfaces. DHCP is not implemented in lwIP 0.5.1,
     however, so turning this on does currently not work.
   */
  #    define LWIP_DHCP 0
  
  /* ---------- UDP options ---------- */
  #    define LWIP_UDP 1 /* needed for DNS */
  #    define UDP_TTL 255
  
  /* ---------- Statistics options ---------- */
  #    define LWIP_STATS 0
  #    define LWIP_PROVIDE_ERRNO
  
  /* ---------- link callback options ---------- */
  /* LWIP_NETIF_LINK_CALLBACK==1: Support a callback
   * function from an interface whenever the link changes
   * (i.e., link down)
   */
  #    define LWIP_NETIF_LINK_CALLBACK 1
  
  /*
     --------------------------------------
     ---------- Checksum options ----------
     --------------------------------------
    */
  
  /*
  The STM32F4x7 allows computing and verifying the IP, UDP,
  TCP and ICMP checksums by hardware:
   - To use this feature let the following define
  uncommented.
   - To disable it and process by CPU comment the  the
  checksum.
    */
  #    define CHECKSUM_BY_HARDWARE 0
  
  #    if (CHECKSUM_BY_HARDWARE == 1)
  /* CHECKSUM_GEN_IP==0: Generate checksums by hardware for
   * outgoing IP packets.*/
  #        define CHECKSUM_GEN_IP 0
  /* CHECKSUM_GEN_UDP==0: Generate checksums by hardware
   * for outgoing UDP packets.*/
  #        define CHECKSUM_GEN_UDP 0
  /* CHECKSUM_GEN_TCP==0: Generate checksums by hardware
   * for outgoing TCP packets.*/
  #        define CHECKSUM_GEN_TCP 0
  /* CHECKSUM_CHECK_IP==0: Check checksums by hardware for
   * incoming IP packets.*/
  #        define CHECKSUM_CHECK_IP 0
  /* CHECKSUM_CHECK_UDP==0: Check checksums by hardware for
   * incoming UDP packets.*/
  #        define CHECKSUM_CHECK_UDP 0
  /* CHECKSUM_CHECK_TCP==0: Check checksums by hardware for
   * incoming TCP packets.*/
  #        define CHECKSUM_CHECK_TCP 0
  /* CHECKSUM_CHECK_ICMP==0: Check checksums by hardware
   * for incoming ICMP packets.*/
  #        define CHECKSUM_GEN_ICMP 0
  #    else
  /* CHECKSUM_GEN_IP==1: Generate checksums in software for
   * outgoing IP packets.*/
  #        define CHECKSUM_GEN_IP 1
  /* CHECKSUM_GEN_UDP==1: Generate checksums in software
   * for outgoing UDP packets.*/
  #        define CHECKSUM_GEN_UDP 1
  /* CHECKSUM_GEN_TCP==1: Generate checksums in software
   * for outgoing TCP packets.*/
  #        define CHECKSUM_GEN_TCP 1
  /* CHECKSUM_CHECK_IP==1: Check checksums in software for
   * incoming IP packets.*/
  #        define CHECKSUM_CHECK_IP 1
  /* CHECKSUM_CHECK_UDP==1: Check checksums in software for
   * incoming UDP packets.*/
  #        define CHECKSUM_CHECK_UDP 1
  /* CHECKSUM_CHECK_TCP==1: Check checksums in software for
   * incoming TCP packets.*/
  #        define CHECKSUM_CHECK_TCP 1
  /* CHECKSUM_CHECK_ICMP==1: Check checksums by hardware
   * for incoming ICMP packets.*/
  #        define CHECKSUM_GEN_ICMP 1
  #    endif /* CHECKSUM_BY_HARDWARE */
  
  /*
     ----------------------------------------------
     ---------- Sequential layer options ----------
     ----------------------------------------------
    */
  /**
   * LWIP_NETCONN==1: Enable Netconn API (require to use
   * api_lib.c)
   */
  /* Change next define to support socket interface */
  #    define LWIP_NETCONN 1
  
  /*
     ------------------------------------
     ---------- Socket options ----------
     ------------------------------------
    */
  /**
   * LWIP_SOCKET==1: Enable Socket API (require to use
   * sockets.c)
   */
  /* Change next define to support socket interface */
  #    define LWIP_SOCKET 1
  
  /*
     -----------------------------------
     ---------- DEBUG options ----------
     -----------------------------------
    */
  
  /* #define LWIP_DEBUG */
  
  /*
     ---------------------------------
     ---------- OS options ----------
     ---------------------------------
    */
  
  #    define TCPIP_THREAD_NAME "TCP/IP"
  #    define TCPIP_THREAD_STACKSIZE TCPIP_THREAD_STACK_SIZE
  #    define TCPIP_MBOX_SIZE 10
  #    define DEFAULT_UDP_RECVMBOX_SIZE 16
  #    define DEFAULT_TCP_RECVMBOX_SIZE 16
  #    define DEFAULT_ACCEPTMBOX_SIZE 16
  #    define DEFAULT_THREAD_STACKSIZE 500
  #    define LWIP_COMPAT_MUTEX 1
  
  /* If your port already typedef's socklen_t, define
     SOCKLEN_T_DEFINED
     to prevent this code from redefining it. */
  #    if !defined(socklen_t) && !defined(SOCKLEN_T_DEFINED)
  typedef int32_t socklen_t;
  #        define SOCKLEN_T_DEFINED (1)
  #    endif /* !defined(socklen_t) && !defined(SOCKLEN_T_DEFINED) */
  
  #endif /* __LWIPOPTS_H__ */
  
  /************************ (C) COPYRIGHT
   * STMicroelectronics *****END OF FILE****/
  