text: /*
   * 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 <stdlib.h>
  #include <time.h>
  #include <unistd.h>
  #include <sys/time.h>
  #include <sys/fcntl.h>
  #include <sys/ioctl.h>
  #include <sys/types.h>
  #include <sys/select.h>
  #include "esp_task.h"
  #include "esp_system.h"
  #include "sdkconfig.h"
  
  #include "netif/dhcp_state.h"
  
  #include <nf_lwipopts_sntp.h>
  #include <sys/errno.h> 
  
  /* Enable all Espressif-only options */
  
  /*
     -----------------------------------------------
     ---------- Platform specific locking ----------
     -----------------------------------------------
  */
  /**
   * SYS_LIGHTWEIGHT_PROT==1: if you want inter-task protection for certain
   * critical regions during buffer allocation, deallocation and memory
   * allocation and deallocation.
   */
  #define SYS_LIGHTWEIGHT_PROT        1
  
  /**
   * MEMCPY: override this if you have a faster implementation at hand than the
   * one included in your C library
   */
  #define MEMCPY(dst,src,len)             memcpy(dst,src,len)
  
  /**
   * SMEMCPY: override this with care! Some compilers (e.g. gcc) can inline a
   * call to memcpy() if the length is known at compile time and is small.
   */
  #define SMEMCPY(dst,src,len)            memcpy(dst,src,len)
  
  #define LWIP_RAND       esp_random
  
  /*
     ------------------------------------
     ---------- Memory options ----------
     ------------------------------------
  */
  /**
   * MEM_LIBC_MALLOC==1: Use malloc/free/realloc provided by your C-library
   * instead of the lwip internal allocator. Can save code size if you
   * already use it.
   */
  #define MEM_LIBC_MALLOC        1
  
  /**
  * MEMP_MEM_MALLOC==1: Use mem_malloc/mem_free instead of the lwip pool allocator.
  * Especially useful with MEM_LIBC_MALLOC but handle with care regarding execution
  * speed and usage from interrupts!
  */
  #define MEMP_MEM_MALLOC                 1
  
  /**
   * 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
  
  /*
     ------------------------------------------------
     ---------- Internal Memory Pool Sizes ----------
     ------------------------------------------------
  */
  
  /**
   * MEMP_NUM_NETCONN: the number of struct netconns.
   * (only needed if you use the sequential API, like api_lib.c)
   */
  #define MEMP_NUM_NETCONN                CONFIG_LWIP_MAX_SOCKETS
  
  /**
   * MEMP_NUM_RAW_PCB: Number of raw connection PCBs
   * (requires the LWIP_RAW option)
   */
  #define MEMP_NUM_RAW_PCB                CONFIG_LWIP_MAX_RAW_PCBS
  
  /**
   * MEMP_NUM_TCP_PCB: the number of simultaneously active TCP connections.
   * (requires the LWIP_TCP option)
   */
  #define MEMP_NUM_TCP_PCB                CONFIG_LWIP_MAX_ACTIVE_TCP
  
  /**
   * MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP connections.
   * (requires the LWIP_TCP option)
   */
  #define MEMP_NUM_TCP_PCB_LISTEN         CONFIG_LWIP_MAX_LISTENING_TCP
  
  /**
   * MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
   * per active UDP "connection".
   * (requires the LWIP_UDP option)
   */
  #define MEMP_NUM_UDP_PCB                CONFIG_LWIP_MAX_UDP_PCBS
  
  /*
     --------------------------------
     ---------- ARP options -------
     --------------------------------
  */
  /**
   * ARP_QUEUEING==1: Multiple outgoing packets are queued during hardware address
   * resolution. By default, only the most recent packet is queued per IP address.
   * This is sufficient for most protocols and mainly reduces TCP connection
   * startup time. Set this to 1 if you know your application sends more than one
   * packet in a row to an IP address that is not in the ARP cache.
   */
  #define ARP_QUEUEING                    1
  
  /*
     --------------------------------
     ---------- IP options ----------
     --------------------------------
  */
  /**
   * IP_REASSEMBLY==1: Reassemble incoming fragmented IP packets. Note that
   * this option does not affect outgoing packet sizes, which can be controlled
   * via IP_FRAG.
   */
  #define IP_REASSEMBLY                   CONFIG_LWIP_IP_REASSEMBLY
  
  /**
   * IP_FRAG==1: Fragment outgoing IP packets if their size exceeds MTU. Note
   * that this option does not affect incoming packet sizes, which can be
   * controlled via IP_REASSEMBLY.
   */
  #define IP_FRAG                         CONFIG_LWIP_IP_FRAG
  
  /**
   * IP_REASS_MAXAGE: Maximum time (in multiples of IP_TMR_INTERVAL - so seconds, normally)
   * a fragmented IP packet waits for all fragments to arrive. If not all fragments arrived
   * in this time, the whole packet is discarded.
   */
  #define IP_REASS_MAXAGE                 3
  
  /**
   * 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!
   */
  #define IP_REASS_MAX_PBUFS              10
  
  /*
     ----------------------------------
     ---------- ICMP options ----------
     ----------------------------------
  */
  
  #define LWIP_BROADCAST_PING CONFIG_LWIP_BROADCAST_PING
  
  #define LWIP_MULTICAST_PING CONFIG_LWIP_MULTICAST_PING
  
  /*
     ---------------------------------
     ---------- RAW options ----------
     ---------------------------------
  */
  /**
   * LWIP_RAW==1: Enable application layer to hook into the IP layer itself.
   */
  #define LWIP_RAW                        1
  
  /*
     ----------------------------------
     ---------- DHCP options ----------
     ----------------------------------
  */
  /**
   * LWIP_DHCP==1: Enable DHCP module.
   */
  #define LWIP_DHCP                       1
  
  #define DHCP_MAXRTX                     0
  
  /**
   * DHCP_DOES_ARP_CHECK==1: Do an ARP check on the offered address.
   */
  #define DHCP_DOES_ARP_CHECK             CONFIG_LWIP_DHCP_DOES_ARP_CHECK
  
  
  /**
   * CONFIG_LWIP_DHCP_RESTORE_LAST_IP==1: Last valid IP address obtained from DHCP server
   * is restored after reset/power-up.
   */
  #if CONFIG_LWIP_DHCP_RESTORE_LAST_IP
  
  #define LWIP_DHCP_IP_ADDR_RESTORE()     dhcp_ip_addr_restore(netif)
  #define LWIP_DHCP_IP_ADDR_STORE()       dhcp_ip_addr_store(netif)
  #define LWIP_DHCP_IP_ADDR_ERASE()       dhcp_ip_addr_erase(esp_netif[tcpip_if])
  
  #endif
  
  /*
     ------------------------------------
     ---------- AUTOIP options ----------
     ------------------------------------
  */
  #ifdef CONFIG_LWIP_AUTOIP
  #define LWIP_AUTOIP                     1
  
  /**
  * LWIP_DHCP_AUTOIP_COOP==1: Allow DHCP and AUTOIP to be both enabled on
  * the same interface at the same time.
  */
  #define LWIP_DHCP_AUTOIP_COOP           1
  
  /**
  * LWIP_DHCP_AUTOIP_COOP_TRIES: Set to the number of DHCP DISCOVER probes
  * that should be sent before falling back on AUTOIP. This can be set
  * as low as 1 to get an AutoIP address very quickly, but you should
  * be prepared to handle a changing IP address when DHCP overrides
  * AutoIP.
  */
  #define LWIP_DHCP_AUTOIP_COOP_TRIES     CONFIG_LWIP_AUTOIP_TRIES
  
  #define LWIP_AUTOIP_MAX_CONFLICTS CONFIG_LWIP_AUTOIP_MAX_CONFLICTS
  
  #define LWIP_AUTOIP_RATE_LIMIT_INTERVAL CONFIG_LWIP_AUTOIP_RATE_LIMIT_INTERVAL
  
  #endif /* CONFIG_LWIP_AUTOIP */
  
  /*
     ----------------------------------
     ---------- SNMP options ----------
     ----------------------------------
  */
  /*
     ----------------------------------
     ---------- IGMP options ----------
     ----------------------------------
  */
  /**
   * LWIP_IGMP==1: Turn on IGMP module.
   */
  #define LWIP_IGMP                       1
  
  /*
     ----------------------------------
     ---------- DNS options -----------
     ----------------------------------
  */
  /**
   * LWIP_DNS==1: Turn on DNS module. UDP must be available for DNS
   * transport.
   */
  #define LWIP_DNS                        1
  
  #define DNS_MAX_SERVERS                 3
  #define DNS_FALLBACK_SERVER_INDEX        (DNS_MAX_SERVERS - 1)
  
  /*
     ---------------------------------
     ---------- UDP options ----------
     ---------------------------------
  */
  /*
     ---------------------------------
     ---------- TCP options ----------
     ---------------------------------
  */
  
  
  /**
   * TCP_QUEUE_OOSEQ==1: TCP will queue segments that arrive out of order.
   * Define to 0 if your device is low on memory.
   */
  #define TCP_QUEUE_OOSEQ                 CONFIG_TCP_QUEUE_OOSEQ
  
  /**
   * ESP_TCP_KEEP_CONNECTION_WHEN_IP_CHANGES==1: Keep TCP connection when IP changed
   * scenario happens: 192.168.0.2 -> 0.0.0.0 -> 192.168.0.2 or 192.168.0.2 -> 0.0.0.0
   */
  
  #define ESP_TCP_KEEP_CONNECTION_WHEN_IP_CHANGES  CONFIG_ESP_TCP_KEEP_CONNECTION_WHEN_IP_CHANGES
  /*
   *     LWIP_EVENT_API==1: The user defines lwip_tcp_event() to receive all
   *         events (accept, sent, etc) that happen in the system.
   *     LWIP_CALLBACK_API==1: The PCB callback function is called directly
   *         for the event. This is the default.
  */
  #define TCP_MSS                         CONFIG_TCP_MSS
  
  /**
   * TCP_MSL: The maximum segment lifetime in milliseconds
   */
  #define TCP_MSL                         CONFIG_TCP_MSL
  
  /**
   * TCP_MAXRTX: Maximum number of retransmissions of data segments.
   */
  #define TCP_MAXRTX                      CONFIG_TCP_MAXRTX
  
  /**
   * TCP_SYNMAXRTX: Maximum number of retransmissions of SYN segments.
   */
  #define TCP_SYNMAXRTX                   CONFIG_TCP_SYNMAXRTX
  
  /**
   * TCP_LISTEN_BACKLOG: Enable the backlog option for tcp listen pcb.
   */
  #define TCP_LISTEN_BACKLOG              1
  
  
  /**
   * TCP_OVERSIZE: The maximum number of bytes that tcp_write may
   * allocate ahead of time
   */
  #ifdef CONFIG_TCP_OVERSIZE_MSS
  #define TCP_OVERSIZE                    TCP_MSS
  #endif
  #ifdef CONFIG_TCP_OVERSIZE_QUARTER_MSS
  #define TCP_OVERSIZE                    (TCP_MSS/4)
  #endif
  #ifdef CONFIG_TCP_OVERSIZE_DISABLE
  #define TCP_OVERSIZE                    0
  #endif
  #ifndef TCP_OVERSIZE
  #error "One of CONFIG_TCP_OVERSIZE_xxx options should be set by sdkconfig"
  #endif
  
  /**
   * LWIP_WND_SCALE and TCP_RCV_SCALE:
   * Set LWIP_WND_SCALE to 1 to enable window scaling.
   * Set TCP_RCV_SCALE to the desired scaling factor (shift count in the
   * range of [0..14]).
   * When LWIP_WND_SCALE is enabled but TCP_RCV_SCALE is 0, we can use a large
   * send window while having a small receive window only.
   */
  #ifdef CONFIG_LWIP_WND_SCALE
  #define LWIP_WND_SCALE                  1
  #define TCP_RCV_SCALE                   CONFIG_TCP_RCV_SCALE
  #endif
  
  /**
   * LWIP_TCP_RTO_TIME: TCP rto time.
   * Default is 3 second.
   */
  #define LWIP_TCP_RTO_TIME             CONFIG_LWIP_TCP_RTO_TIME
  
  /**
   * Set TCP hook for Initial Sequence Number (ISN)
   */
  #ifdef CONFIG_LWIP_TCP_ISN_HOOK
  //#include <lwip/arch.h>
  //struct ip_addr;
  //u32_t lwip_hook_tcp_isn(const struct ip_addr *local_ip, u16_t local_port,
  //                        const struct ip_addr *remote_ip, u16_t remote_port);
  #define LWIP_HOOK_TCP_ISN               lwip_hook_tcp_isn
  #endif
  
  /*
     ----------------------------------
     ---------- Pbuf options ----------
     ----------------------------------
  */
  
  /*
     ------------------------------------------------
     ---------- Network Interfaces options ----------
     ------------------------------------------------
  */
  
  /**
   * LWIP_NETIF_HOSTNAME==1: use DHCP_OPTION_HOSTNAME with netif's hostname
   * field.
   */
  #define LWIP_NETIF_HOSTNAME             1
  
  /**
   * LWIP_NETIF_TX_SINGLE_PBUF: if this is set to 1, lwIP tries to put all data
   * to be sent into one single pbuf. This is for compatibility with DMA-enabled
   * MACs that do not support scatter-gather.
   * Beware that this might involve CPU-memcpy before transmitting that would not
   * be needed without this flag! Use this only if you need to!
   *
   * @todo: TCP and IP-frag do not work with this, yet:
   */
  #define LWIP_NETIF_TX_SINGLE_PBUF             1
  
  /*
     ------------------------------------
     ---------- LOOPIF options ----------
     ------------------------------------
  */
  #ifdef CONFIG_LWIP_NETIF_LOOPBACK
  /**
   * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP
   * address equal to the netif IP address, looping them back up the stack.
   */
  #define LWIP_NETIF_LOOPBACK             1
  
  /**
   * LWIP_LOOPBACK_MAX_PBUFS: Maximum number of pbufs on queue for loopback
   * sending for each netif (0 = disabled)
   */
  #define LWIP_LOOPBACK_MAX_PBUFS         CONFIG_LWIP_LOOPBACK_MAX_PBUFS
  #endif
  
  /*
     ------------------------------------
     ---------- SLIPIF options ----------
     ------------------------------------
  */
  
  /*
     ------------------------------------
     ---------- Thread options ----------
     ------------------------------------
  */
  /**
   * TCPIP_THREAD_NAME: The name assigned to the main tcpip thread.
   */
  #define TCPIP_THREAD_NAME              "tiT"
  
  /**
   * 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          ESP_TASK_TCPIP_STACK
  
  /**
   * 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.
   */
  #define TCPIP_THREAD_PRIO               ESP_TASK_TCPIP_PRIO
  
  /**
   * TCPIP_MBOX_SIZE: The mailbox size for the tcpip thread messages
   * The queue size value itself is platform-dependent, but is passed to
   * sys_mbox_new() when tcpip_init is called.
   */
  #define TCPIP_MBOX_SIZE                 CONFIG_TCPIP_RECVMBOX_SIZE
  
  /**
   * DEFAULT_UDP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
   * NETCONN_UDP. The queue size value itself is platform-dependent, but is passed
   * to sys_mbox_new() when the recvmbox is created.
   */
  #define DEFAULT_UDP_RECVMBOX_SIZE       CONFIG_UDP_RECVMBOX_SIZE
  
  /**
   * DEFAULT_TCP_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
   * NETCONN_TCP. The queue size value itself is platform-dependent, but is passed
   * to sys_mbox_new() when the recvmbox is created.
   */
  #define DEFAULT_TCP_RECVMBOX_SIZE       CONFIG_TCP_RECVMBOX_SIZE
  
  /**
   * DEFAULT_ACCEPTMBOX_SIZE: The mailbox size for the incoming connections.
   * The queue size value itself is platform-dependent, but is passed to
   * sys_mbox_new() when the acceptmbox is created.
   */
  #define DEFAULT_ACCEPTMBOX_SIZE         6
  
  /**
   * DEFAULT_THREAD_STACKSIZE: The stack size used by any other lwIP thread.
   * The stack size value itself is platform-dependent, but is passed to
   * sys_thread_new() when the thread is created.
   */
  #define DEFAULT_THREAD_STACKSIZE        TCPIP_THREAD_STACKSIZE
  
  /**
   * DEFAULT_THREAD_PRIO: The priority assigned to any other lwIP thread.
   * The priority value itself is platform-dependent, but is passed to
   * sys_thread_new() when the thread is created.
   */
  #define DEFAULT_THREAD_PRIO             TCPIP_THREAD_PRIO
  
  /**
   * DEFAULT_RAW_RECVMBOX_SIZE: The mailbox size for the incoming packets on a
   * NETCONN_RAW. The queue size value itself is platform-dependent, but is passed
   * to sys_mbox_new() when the recvmbox is created.
   */
  #define DEFAULT_RAW_RECVMBOX_SIZE       6
  
  /*
     ----------------------------------------------
     ---------- Sequential layer options ----------
     ----------------------------------------------
  */
  /**
   * LWIP_TCPIP_CORE_LOCKING: (EXPERIMENTAL!)
   * Don't use it if you're not an active lwIP project member
   */
  #define LWIP_TCPIP_CORE_LOCKING         0
  
  /*
     ------------------------------------
     ---------- Socket options ----------
     ------------------------------------
  */
  /**
   * LWIP_SO_SNDTIMEO==1: Enable send timeout for sockets/netconns and
   * SO_SNDTIMEO processing.
   */
  #define LWIP_SO_SNDTIMEO                1
  
  /**
   * LWIP_SO_RCVTIMEO==1: Enable receive timeout for sockets/netconns and
   * SO_RCVTIMEO processing.
   */
  #define LWIP_SO_RCVTIMEO                1
  
  /**
    * LWIP_SO_LINGER==1: Enable linger option for sockets/netconns
    */
  #define LWIP_SO_LINGER                  1
  
  /**
   * LWIP_TCP_KEEPALIVE==1: Enable TCP_KEEPIDLE, TCP_KEEPINTVL and TCP_KEEPCNT
   * options processing. Note that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set
   * in seconds. (does not require sockets.c, and will affect tcp.c)
   */
  #define LWIP_TCP_KEEPALIVE              1
  
  /**
   * LWIP_SO_RCVBUF==1: Enable SO_RCVBUF processing.
   */
  #define LWIP_SO_RCVBUF                  CONFIG_LWIP_SO_RCVBUF
  
  /**
   * SO_REUSE==1: Enable SO_REUSEADDR option.
   * This option is set via menuconfig.
   */
  #define SO_REUSE                        CONFIG_LWIP_SO_REUSE
  
  /**
   * SO_REUSE_RXTOALL==1: Pass a copy of incoming broadcast/multicast packets
   * to all local matches if SO_REUSEADDR is turned on.
   * WARNING: Adds a memcpy for every packet if passing to more than one pcb!
   */
  #define SO_REUSE_RXTOALL                CONFIG_LWIP_SO_REUSE_RXTOALL
  
  /*
     ----------------------------------------
     ---------- Statistics options ----------
     ----------------------------------------
  */
  
  /**
   * LWIP_STATS==1: Enable statistics collection in lwip_stats.
   */
  #define LWIP_STATS                      CONFIG_LWIP_STATS
  
  #if LWIP_STATS
  
  /**
   * LWIP_STATS_DISPLAY==1: Compile in the statistics output functions.
   */
  #define LWIP_STATS_DISPLAY              CONFIG_LWIP_STATS
  #endif
  
  
  /*
     ---------------------------------
     ---------- PPP options ----------
     ---------------------------------
  */
  
  /**
   * PPP_SUPPORT==1: Enable PPP.
   */
  #define PPP_SUPPORT                     CONFIG_PPP_SUPPORT
  
  #if PPP_SUPPORT
  
  /**
   * PPP_NOTIFY_PHASE==1: Support PPP notify phase.
   */
  #define PPP_NOTIFY_PHASE                CONFIG_PPP_NOTIFY_PHASE_SUPPORT
  
  /**
   * PAP_SUPPORT==1: Support PAP.
   */
  #define PAP_SUPPORT                     CONFIG_PPP_PAP_SUPPORT
  
  /**
   * CHAP_SUPPORT==1: Support CHAP.
   */
  #define CHAP_SUPPORT                    CONFIG_PPP_CHAP_SUPPORT
  
  /**
   * MSCHAP_SUPPORT==1: Support MSCHAP.
   */
  #define MSCHAP_SUPPORT                  CONFIG_PPP_MSCHAP_SUPPORT
  
  /**
   * CCP_SUPPORT==1: Support CCP.
   */
  #define MPPE_SUPPORT                    CONFIG_PPP_MPPE_SUPPORT
  
  /**
   * PPP_MAXIDLEFLAG: Max Xmit idle time (in ms) before resend flag char.
   * TODO: If PPP_MAXIDLEFLAG > 0 and next package is send during PPP_MAXIDLEFLAG time,
   *       then 0x7E is not added at the begining of PPP package but 0x7E termination
   *       is always at the end. This behaviour brokes PPP dial with GSM (PPPoS).
   *       The PPP package should always start and end with 0x7E.
   */
  
  #define PPP_MAXIDLEFLAG                 0
  
  /**
   * PPP_DEBUG: Enable debugging for PPP.
   */
  #define PPP_DEBUG_ON					CONFIG_PPP_DEBUG_ON
  
  #if PPP_DEBUG_ON
  #define PPP_DEBUG                       LWIP_DBG_ON
  #else
  #define PPP_DEBUG                       LWIP_DBG_OFF
  #endif
  
  #endif
  
  /*
     --------------------------------------
     ---------- Checksum options ----------
     --------------------------------------
  */
  
  /*
     ---------------------------------------
     ---------- IPv6 options ---------------
     ---------------------------------------
  */
  /**
   * LWIP_IPV6==1: Enable IPv6
   */
  #define LWIP_IPV6                       1
  
  /*
     ---------------------------------------
     ---------- Hook options ---------------
     ---------------------------------------
  */
  #define LWIP_HOOK_IP4_ROUTE_SRC         ip4_route_src_hook
  /*
     ---------------------------------------
     ---------- Debugging options ----------
     ---------------------------------------
  */
  /**
   * ETHARP_DEBUG: Enable debugging in etharp.c.
   */
  #define ETHARP_DEBUG                    LWIP_DBG_OFF
  
  /**
   * NETIF_DEBUG: Enable debugging in netif.c.
   */
  #define NETIF_DEBUG                     LWIP_DBG_OFF
  
  /**
   * PBUF_DEBUG: Enable debugging in pbuf.c.
   */
  #define PBUF_DEBUG                      LWIP_DBG_OFF
  
  /**
   * API_LIB_DEBUG: Enable debugging in api_lib.c.
   */
  #define API_LIB_DEBUG                   LWIP_DBG_OFF
  
  /**
   * SOCKETS_DEBUG: Enable debugging in sockets.c.
   */
  #define SOCKETS_DEBUG                   LWIP_DBG_OFF
  
  /**
   * ICMP_DEBUG: Enable debugging in icmp.c.
   */
  #define ICMP_DEBUG                      LWIP_DBG_OFF
  
  /**
   * IP_DEBUG: Enable debugging for IP.
   */
  #define IP_DEBUG                        LWIP_DBG_OFF
  
  /**
   * MEMP_DEBUG: Enable debugging in memp.c.
   */
  #define MEMP_DEBUG                      LWIP_DBG_OFF
  
  /**
   * TCP_INPUT_DEBUG: Enable debugging in tcp_in.c for incoming debug.
   */
  #define TCP_INPUT_DEBUG                 LWIP_DBG_OFF
  
  /**
   * TCP_OUTPUT_DEBUG: Enable debugging in tcp_out.c output functions.
   */
  #define TCP_OUTPUT_DEBUG                LWIP_DBG_OFF
  
  /**
   * TCPIP_DEBUG: Enable debugging in tcpip.c.
   */
  #define TCPIP_DEBUG                     LWIP_DBG_OFF
  
  /**
   * ETHARP_TRUST_IP_MAC==1: Incoming IP packets cause the ARP table to be
   * updated with the source MAC and IP addresses supplied in the packet.
   * You may want to disable this if you do not trust LAN peers to have the
   * correct addresses, or as a limited approach to attempt to handle
   * spoofing. If disabled, lwIP will need to make a new ARP request if
   * the peer is not already in the ARP table, adding a little latency.
   * The peer *is* in the ARP table if it requested our address before.
   * Also notice that this slows down input processing of every IP packet!
   */
  #define ETHARP_TRUST_IP_MAC             CONFIG_LWIP_ETHARP_TRUST_IP_MAC
  
  
  /**
   * POSIX I/O functions are mapped to LWIP via the VFS layer
   * (see port/vfs_lwip.c)
   */
  #define LWIP_POSIX_SOCKETS_IO_NAMES     0
  
  /**
   * FD_SETSIZE from sys/types.h is the maximum number of supported file
   * descriptors and CONFIG_LWIP_MAX_SOCKETS defines the number of sockets;
   * LWIP_SOCKET_OFFSET is configured to use the largest numbers of file
   * descriptors for sockets. File descriptors from 0 to LWIP_SOCKET_OFFSET-1
   * are non-socket descriptors and from LWIP_SOCKET_OFFSET to FD_SETSIZE are
   * socket descriptors.
   */
  #define LWIP_SOCKET_OFFSET              (FD_SETSIZE - CONFIG_LWIP_MAX_SOCKETS)
  
  #define TCP_OOSEQ_DEBUG LWIP_DBG_ON
  
  /* Enable all Espressif-only options */
  
  #define ESP_LWIP                        1
  #define ESP_LWIP_ARP                    1
  #define ESP_PER_SOC_TCP_WND             0
  #define ESP_THREAD_SAFE                 1
  #define ESP_THREAD_SAFE_DEBUG           LWIP_DBG_OFF
  #define ESP_DHCP                        1
  #define ESP_DNS                         1
  #define ESP_IPV6_AUTOCONFIG             1
  #define ESP_PERF                        0
  #define ESP_RANDOM_TCP_PORT             1
  #define ESP_IP4_ATON                    1
  #define ESP_LIGHT_SLEEP                 1
  #define ESP_L2_TO_L3_COPY               CONFIG_L2_TO_L3_COPY
  #define ESP_STATS_MEM                   CONFIG_LWIP_STATS
  #define ESP_STATS_DROP                  CONFIG_LWIP_STATS
  #define ESP_STATS_TCP                   0
  #define ESP_DHCP_TIMER                  1
  #define ESP_DHCPS_TIMER                 1
  #define ESP_LWIP_LOGI(...)              ESP_LOGI("lwip", __VA_ARGS__)
  #define ESP_PING                        1
  #define ESP_HAS_SELECT                  1
  #define ESP_AUTO_RECV                   1
  #define ESP_GRATUITOUS_ARP              CONFIG_ESP_GRATUITOUS_ARP
  
  #ifdef ESP_IRAM_ATTR
  #undef ESP_IRAM_ATTR
  #endif
  #define ESP_IRAM_ATTR
  
  #if ESP_PERF
  #define DBG_PERF_PATH_SET(dir, point)
  #define DBG_PERF_FILTER_LEN             1000
  
  enum {
    DBG_PERF_DIR_RX = 0,
    DBG_PERF_DIR_TX,
  };
  
  enum {
    DBG_PERF_POINT_INT       = 0,
    DBG_PERF_POINT_WIFI_IN   = 1,
    DBG_PERF_POINT_WIFI_OUT  = 2,
    DBG_PERF_POINT_LWIP_IN   = 3,
    DBG_PERF_POINT_LWIP_OUT  = 4,
    DBG_PERF_POINT_SOC_IN    = 5,
    DBG_PERF_POINT_SOC_OUT   = 6,
  };
  
  #else
  #define DBG_PERF_PATH_SET(dir, point)
  #define DBG_PERF_FILTER_LEN             1000
  #endif
  
  #define TCP_SND_BUF                     CONFIG_TCP_SND_BUF_DEFAULT
  #define TCP_WND                         CONFIG_TCP_WND_DEFAULT
  
  #if ESP_PER_SOC_TCP_WND
  #define TCP_WND_DEFAULT                 CONFIG_TCP_WND_DEFAULT
  #define TCP_SND_BUF_DEFAULT             CONFIG_TCP_SND_BUF_DEFAULT
  #define TCP_WND(pcb)                    (pcb->per_soc_tcp_wnd)
  #define TCP_SND_BUF(pcb)                (pcb->per_soc_tcp_snd_buf)
  #define TCP_SND_QUEUELEN(pcb)           ((4 * (TCP_SND_BUF((pcb))) + (TCP_MSS - 1))/(TCP_MSS))
  #define TCP_SNDLOWAT(pcb)               LWIP_MIN(LWIP_MAX(((TCP_SND_BUF((pcb)))/2), (2 * TCP_MSS) + 1), (TCP_SND_BUF((pcb))) - 1)
  #define TCP_SNDQUEUELOWAT(pcb)          LWIP_MAX(((TCP_SND_QUEUELEN((pcb)))/2), 5)
  #define TCP_WND_UPDATE_THRESHOLD(pcb)   LWIP_MIN((TCP_WND((pcb)) / 4), (TCP_MSS * 4))
  #endif
  
  /**
   * DHCP_DEBUG: Enable debugging in dhcp.c.
   */
  #define DHCP_DEBUG                      LWIP_DBG_OFF
  #define LWIP_DEBUG                      LWIP_DBG_OFF
  #define TCP_DEBUG                       LWIP_DBG_OFF
  
  #define CHECKSUM_CHECK_UDP              0
  #define CHECKSUM_CHECK_IP               0
  
  #define LWIP_NETCONN_FULLDUPLEX         1
  #define LWIP_NETCONN_SEM_PER_THREAD     1
  
  #define LWIP_DHCP_MAX_NTP_SERVERS       CONFIG_LWIP_DHCP_MAX_NTP_SERVERS
  #define LWIP_TIMEVAL_PRIVATE            0
  
  #define SNTP_SET_SYSTEM_TIME_US(sec, us)  \
      do { \
          struct timeval tv = { .tv_sec = sec, .tv_usec = us }; \
          settimeofday(&tv, NULL); \
      } while (0);
  
  #define SNTP_GET_SYSTEM_TIME(sec, us) \
      do { \
          struct timeval tv = { .tv_sec = 0, .tv_usec = 0 }; \
          gettimeofday(&tv, NULL); \
          (sec) = tv.tv_sec;  \
          (us) = tv.tv_usec; \
      } while (0);
  
  #define SOC_SEND_LOG //printf
  
  #endif // _LWIPOPTS_H */
  