esp-idf/components/lwip/port/esp32/include/lwipopts.h

/*
 * 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 "sntp.h"
#include "netif/dhcp_state.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

/*
   ----------------------------------
   ---------- 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_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)

/* 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 }; \
        sntp_sync_time(&tv); \
    } 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; \
        sntp_set_sync_status(SNTP_SYNC_STATUS_RESET); \
    } while (0);

#define SOC_SEND_LOG //printf

#endif /* __LWIPOPTS_H__ */