text: #ifndef __LWIPOPTS_H_
  #define __LWIPOPTS_H_
  
  #ifndef PROCESSOR_LITTLE_ENDIAN
  #define PROCESSOR_LITTLE_ENDIAN
  #endif
  
  #define SYS_LIGHTWEIGHT_PROT 1
  
  #define NO_SYS 1
  #define LWIP_SOCKET 0
  #define LWIP_COMPAT_SOCKETS 0
  #define LWIP_NETCONN 0
  
  #define MEM_ALIGNMENT 64
  #define MEM_SIZE 131072
  #define MEMP_NUM_PBUF 16
  #define MEMP_NUM_UDP_PCB 4
  #define MEMP_NUM_TCP_PCB 32
  #define MEMP_NUM_TCP_PCB_LISTEN 8
  #define MEMP_NUM_TCP_SEG 256
  #define MEMP_NUM_SYS_TIMEOUT 8
  #define MEMP_NUM_NETBUF 8
  #define MEMP_NUM_NETCONN 16
  #define MEMP_NUM_TCPIP_MSG_API 16
  #define MEMP_NUM_TCPIP_MSG_INPKT 64
  
  #define MEMP_NUM_SYS_TIMEOUT 8
  #define PBUF_POOL_SIZE 256
  #define PBUF_POOL_BUFSIZE 1700
  #define PBUF_LINK_HLEN 16
  
  #define ARP_TABLE_SIZE 10
  #define ARP_QUEUEING 1
  
  #define ICMP_TTL 255
  
  #define IP_OPTIONS 0
  #define IP_FORWARD 0
  #define IP_REASSEMBLY 1
  #define IP_FRAG 1
  #define IP_REASS_MAX_PBUFS 128
  #define IP_FRAG_MAX_MTU 1500
  #define IP_DEFAULT_TTL 255
  #define LWIP_CHKSUM_ALGORITHM 3
  
  #define LWIP_UDP 1
  #define UDP_TTL 255
  
  #define LWIP_TCP 1
  #define TCP_MSS 1460
  #define TCP_SND_BUF 8192
  #define TCP_WND 2048
  #define TCP_TTL 255
  #define TCP_MAXRTX 12
  #define TCP_SYNMAXRTX 4
  #define TCP_QUEUE_OOSEQ 1
  #define TCP_SND_QUEUELEN   16 * TCP_SND_BUF/TCP_MSS
  #define CHECKSUM_GEN_TCP 	1
  #define CHECKSUM_GEN_UDP 	1
  #define CHECKSUM_GEN_IP  	1
  #define CHECKSUM_CHECK_TCP  1
  #define CHECKSUM_CHECK_UDP  1
  #define CHECKSUM_CHECK_IP 	1
  
  #define NO_SYS_NO_TIMERS 1
  #define MEMP_SEPARATE_POOLS 1
  #define MEMP_NUM_FRAG_PBUF 256
  #define IP_OPTIONS_ALLOWED 0
  #define TCP_OVERSIZE 0
  
  #define LWIP_DHCP 0
  #define DHCP_DOES_ARP_CHECK 0
  
  #define CONFIG_LINKSPEED_AUTODETECT 1
  
  #endif
  