官网下载的最新的LWIP源码,非常详细,不但有完整的IP,TCP源码,还包括http, mttp源码。
FEATURES
* IP (Internet Protocol, IPv4 and IPv6) including packet forwarding over
multiple network interfaces
* ICMP (Internet Control Message Protocol) for network maintenance and debugging
* IGMP (Internet Group Management Protocol) for multicast traffic management
* MLD (Multicast listener discovery for IPv6). Aims to be compliant with
RFC 2710. No support for MLDv2
* ND (Neighbor discovery and stateless address autoconfiguration for IPv6).
Aims to be compliant with RFC 4861 (Neighbor discovery) and RFC 4862
(Address autoconfiguration)
* DHCP, AutoIP/APIPA (Zeroconf), ACD (Address Conflict Detection)
and (stateless) DHCPv6
* UDP (User Datagram Protocol) including experimental UDP-lite extensions
* TCP (Transmission Control Protocol) with congestion control, RTT estimation
fast recovery/fast retransmit and sending SACKs
* raw/native API for enhanced performance
* Optional Berkeley-like socket API
* TLS: optional layered TCP ("altcp") for nearly transparent TLS for any
TCP-based protocol (ported to mbedTLS) (see changelog for more info)
* PPPoS and PPPoE (Point-to-point protocol over Serial/Ethernet)
* DNS (Domain name resolver incl. mDNS)
* 6LoWPAN (via IEEE 802.15.4, BLE or ZEP)
APPLICATIONS
* HTTP server with SSI and CGI (HTTPS via altcp)
* SNMPv2c agent with MIB compiler (Simple Network Management Protocol), v3 via altcp
* SNTP (Simple network time protocol)
* NetBIOS name service responder
* MDNS (Multicast DNS) responder
* iPerf server implementation
* MQTT client (TLS support via altcp)