Various definitions of LWIP program OPT.h header file-EEWORLD

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Due to my poor English foundation, I couldn't understand many things, so I checked Baidu translation while checking Baidu. The opt header file in lwip is basically a basic option setting of lwip, which includes a lot of things. If the protocols of arp, icmp, udp, ip, tcp are enabled and set, and there are some other settings, checking this file will help you understand the program settings without knowing it.

A lot of the Chinese content below is translated from Baidu, so it is very inaccurate. Criticism and correction are welcome.

SYS_LIGHTWEIGHT_PROT Platform lock, protecting the allocation and release of cache in key areas

NO_SYS --- Whether to bring the operating system, =1 with, =0 without

MEMCPY(dst,src,len) --- Memory copy. If you want to write your own copy function, you can replace it.

SMEMCPY(dst,src,len) --- Memory copy If you want to write your own copy function, you can replace it

MEM_LIBC_MALLOC --- Use of memory function library, use C library when =1, use your own library when =0

MEMP_MEM_MALLOC --- = 1, use mem_malloc/mem_free instead of allocation pool

MEM_ALIGNMENT --- Byte alignment = 1 should be 2-byte alignment

MEM_SIZE --- Heap memory size should be set very high if a lot of content is sent

MEMP_OVERFLOW_CHECK --- Overflow protection is turned off when it is 0. It can be 1 or 2, 2 is slower

MEMP_SANITY_CHECK --- Chain check, check whether there is a cycle in the list after each free

MEM_USE_POOLS --- Custom memory pools

MEM_USE_POOLS_TRY_BIGGER_POOL--- Increase the memory pool to increase system reliability

MEMP_USE_CUSTOM_POOLS --- Use custom memory pools related to lwippools.h

LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT --- Free memory from other contexts

MEMP_NUM_PBUF --- Number of RAW protocol control blocks

MEMP_NUM_UDP_PCB --- Number of UDP protocol control blocks

MEMP_NUM_TCP_PCB --- Number of TCP protocol control blocks

MEMP_NUM_TCP_PCB_LISTEN ---Number of TCP listening connections

MEMP_NUM_TCP_SEG --- Number of TCP queuing segments

MEMP_NUM_REASSDATA --- Number of IP packets queued

MEMP_NUM_ARP_QUEUE --- Number of arp queues

MEMP_NUM_IGMP_GROUP --- Number of multicast network interfaces

MEMP_NUM_SYS_TIMEOUT --- System timeout setting

MEMP_NUM_NETBUF --- Number of netbuf structures

MEMP_NUM_NETCONN --- Number of netconn structures

MEMP_NUM_TCPIP_MSG_API --- Number of TCPIP messages

MEMP_NUM_TCPIP_MSG_INPKT --- TCPIP data packet related settings

PBUF_POOL_SIZE --- pbuf pool size

LWIP_ARP ---Function on/off

ARP_TABLE_SIZE --- Number of IP address buffer pairs

ARP_QUEUEING --- arp queueing

ETHARP_TRUST_IP_MAC ---arp ip mac first turn off

IP_FORWARD --- IP packet forwarding

IP_OPTIONS_ALLOWED ---IP options allowed

IP_REASSEMBLY --- IP breakpoint resume

IP_FRAG --- IP breakpoint send

IP_REASS_MAXAGE --- Maximum time to fragment a packet

IP_REASS_MAX_PBUFS --- Number of segment assembly

IP_FRAG_USES_STATIC_BUF --- Enable static buffer

IP_FRAG_MAX_MTU ---IP maximum buffer size

IP_DEFAULT_TTL --- IP maximum ttl time

IP_SOF_BROADCAST --- ip sof broadcast

IP_SOF_BROADCAST_RECV --- spf broadcast filtering

LWIP_ICMP --- ICMP enable

ICMP_TTL --- ICMP maximum ttl time

LWIP_BROADCAST_PING --- Whether to respond to broadcast ping

LWIP_MULTICAST_PING --- Whether to respond to multicast ping

LWIP_RAW ---raw protocol enable

RAW_TTL --- raw ttl time

LWIP_DHCP --- DHCP enable

DHCP_DOES_ARP_CHECK --- arp address check

LWIP_AUTOIP --- Automatic ip enable

LWIP_DHCP_AUTOIP_COOP --- dhcp automatic ip interface

WIP_DHCP_AUTOIP_COOP_TRIES --- dhcp discovery number

LWIP_SNMP --- snmp enable

SNMP_CONCURRENT_REQUESTS --- SNMP concurrent requests

SNMP_TRAP_DESTINATIONS --- snmp trap related

SNMP_PRIVATE_MIB --- snmp private mib

SNMP_SAFE_REQUESTS --- SNMP security related

LWIP_IGMP --- IGMP settings

LWIP_DNS --- DNS enable

DNS_TABLE_SIZE --- Maximum number of DNS records

DNS_MAX_NAME_LENGTH --- Maximum length of dns host name

DNS_MAX_SERVERS --- Maximum number of DNS servers

DNS_DOES_NAME_CHECK --- DNS response check

DNS_USES_STATIC_BUF --- DNS local cache number

DNS_MSG_SIZE --- DNS message size

DNS_LOCAL_HOSTLIST --- dns host list

DNS_LOCAL_HOSTLIST_IS_DYNAMIC --- DNS dynamic list

LWIP_UDP --- udp enable

LWIP_UDPLITE --- udp datagram

UDP_TTL --- UDP ttl time

LWIP_TCP --- TCP enable

TCP_TTL --- TCP TTL time

TCP_WND --- TCP window length

TCP_MAXRTX --- TCP maximum retransmission times

TCP_SYNMAXRTX --- Maximum number of retransmissions of TCP syn segment

TCP_QUEUE_OOSEQ --- TCP queue arrival order should be sort-dependent

TCP_MSS --- TCP Maximum Segment Size

TCP_CALCULATE_EFF_SEND_MSS --- Used to limit mms

TCP_SND_BUF --- TCP send buffer space (bytes)

TCP_SND_QUEUELEN ---TCP send buffer space (pbufs)

TCP_SNDLOWAT --- TCP write space (bytes)

TCP_LISTEN_BACKLOG --- Enable TCP backlog selective listen protocol control block

TCP_DEFAULT_LISTEN_BACKLOG --- Maximum number of protocol control blocks allowed to be listened

LWIP_TCP_TIMESTAMPS --- Support TCP timestamp option

TCP_WND_UPDATE_THRESHOLD --- Window update and trigger

LWIP_EVENT_API LWIP_CALLBACK_API --- Only one is 1, controlled by the system or by a callback function

PBUF_LINK_HLEN --- Link layer header

PBUF_POOL_BUFSIZE --- pbuf pool size

LWIP_NETIF_HOSTNAME --- Use dhcp_option_hostname with netif hostname

lwip_netif_api --- Whether to support netif API, 1 means support

LWIP_NETIF_STATUS_CALLBACK --- Callback function support interface

lwip_netif_link_callback --- Link failure related

lwip_netif_hwaddrhint --- Cache link layer address hint

lwip_netif_loopback --- Supports the destination IP of the sent data packet

lwip_loopback_max_pbufs --- Maximum number of pbufs in the queue for loopback

LWIP_NETIF_LOOPBACK_MULTITHREADING --- Whether to enable multithreading

LWIP_NETIF_TX_SINGLE_PBUF --- Single Pbuf send

LWIP_HAVE_LOOPIF --- Support loopback address (127.0.0.1) and loopif.c

LWIP_HAVE_SLIPIF --- Support sliding interface and slipif C

TCPIP_THREAD_NAME --- The name assigned to the main TCPIP thread

tcpip_thread_stacksize --- TCPIP stack size used by the main thread

TCPIP_THREAD_PRIO --- Priority assigned to the main TCPIP thread

tcpip_mbox_size --- Mailbox size for TCPIP thread messages

SLIPIF_THREAD_NAME --- SLIPIF thread name

SLIPIF_THREAD_STACKSIZE --- Assigned to slipif_loop thread priority

PPP_THREAD_NAME --- PPP protocol thread name

PPP_THREAD_STACKSIZE --- Stack size used by the pppmain thread

ppp_thread_prio --- Priority assigned to the pppmain thread

DEFAULT_THREAD_NAME --- Default LWIP thread name

DEFAULT_THREAD_STACKSIZE --- Default stack size

default_thread_prio --- The priority assigned to any other LwIP threads

default_raw_recvmbox_size --- Other raw mailbox sizes

DEFAULT_UDP_RECVMBOX_SIZE --- Other UDP mailbox size

DEFAULT_TCP_RECVMBOX_SIZE --- Other TCP mailbox size

DEFAULT_ACCEPTMBOX_SIZE --- ACCEPTMBOX size

lwip_tcpip_core_locking --- (Experimental!) Not normally used

lwip_netconn --- Enable netconn API (need to use api_lib.C)

lwip_socket --- Enable Socket API (needs sockets.c)

lwip_compat_sockets --- BSD socket function names

lwip_posix_sockets_io_names --- Enable POSIX-style socket function names for posix systems

LWIP_TCP_KEEPALIVE --- Dead link detection

LWIP_SO_RCVBUF --- Enable blocking handler

RECV_BUFSIZE_DEFAULT --- If blocking processing is enabled, this setting is the blocking buffer size

SO_REUSE --- resend

lwip_stats --- Enable lwip_stats statistics

LWIP_STATS_DISPLAY --- Compile and output statistics function

LINK_STATS --- Enable link statistics

ETHARP_STATS --- Enable arp statistics

IP_STATS --- Enable IP statistics

IPFRAG_STATS --- IP fragmentation statistics

ICMP_STATS --- ICMP statistics

IGMP_STATS ---igmp statistics

UDP_STATS --- udp statistics

TCP_STATS --- TCP statistics

MEM_STATS ---Memory management statistics

MEMP_STATS --- Memory list statistics

SYS_STATS --- System statistics

PPP_SUPPORT --- Enable PPP protocol

PPPOE_SUPPORT --- Enable PPPOE protocol

PPPOS_SUPPORT --- Enable pppos protocol

NUM_PPP --- Maximum PPP sessions

PAP_SUPPORT --- Enable pap password authentication protocol

CHAP_SUPPORT--- Enable CHAP protocol

MSCHAP_SUPPORT --- Enable mschap. Currently not supported, do not set

CBCP_SUPPORT --- Enable CBCP. Currently not supported, do not set

CCP_SUPPORT --- Enable CCP. Currently not supported, do not set.

VJ_SUPPORT --- Enable support for this header compression

md5_support --- Support MD5

FSM_DEFTIMEOUT --- DEFTIMEOUT

FSM_DEFMAXTERMREQS --- Maximum termination request transmission

FSM_DEFMAXCONFREQS --- Maximum configuration request transmissions

FSM_DEFMAXNAKLOOPS --- Maximum number of NAK loops

UPAP_DEFTIMEOUT --- Resend request timeout (seconds)

UPAP_DEFREQTIME --- Time to wait for authentication request peer

CHAP_DEFTIMEOUT --- chap default exit time

CHAP_DEFTRANSMITS --- Competition maximum send time

LCP_ECHOINTERVAL --- The interval between KeepAlive echo requests, 0 seconds is disabled

LCP_MAXECHOFAILS --- Number of pending echo requests before failure

PPP_MAXIDLEFLAG --- Maximum transmit idle time (before flag character is sent)

CHECKSUM_GEN_IP --- Generate IP packet checksum

CHECKSUM_GEN_UDP --- Generate UDP packet checksum

CHECKSUM_GEN_TCP --- Generate TCP packet checksum

CHECKSUM_CHECK_IP ---Incoming IP packet check

CHECKSUM_CHECK_UDP --- Incoming UDP packet checksum

CHECKSUM_CHECK_TCP --- Incoming TCP packet checksum

The following are various debugging

LWIP_DBG_MIN_LEVEL

LWIP_DBG_TYPES_ON

ETHARP_DEBUG

NETIF_DEBUG

PBUF_DEBUG

API_LIB_DEBUG

API_MSG_DEBUG

SOCKETS_DEBUG

ICMP_DEBUG

IGMP_DEBUG

INET_DEBUG

IP_DEBUG

IP_REASS_DEBUG

RAW_DEBUG

MEM_DEBUG

MEMP_DEBUG

SYS_DEBUG

TCP_DEBUG

TCP_INPUT_DEBUG

TCP_FR_DEBUG

TCP_RTO_DEBUG

TCP_CWND_DEBUG

TCP_WND_DEBUG

TCP_OUTPUT_DEBUG

TCP_RST_DEBUG

TCP_QLEN_DEBUG

UDP_DEBUG

TCPIP_DEBUG

PPP_DEBUG

SLIP_DEBUG

DHCP_DEBUG

AUTOIP_DEBUG

SNMP_MSG_DEBUG

SNMP_MIB_DEBUG

DNS_DEBUG

Reference address：Various definitions of LWIP program OPT.h header file

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