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- INTRODUCTION
- lwIP is a small independent implementation of the TCP/IP protocol
- suite that has been developed by Adam Dunkels at the Computer and
- Networks Architectures (CNA) lab at the Swedish Institute of Computer
- Science (SICS).
- The focus of the lwIP TCP/IP implementation is to reduce the RAM usage
- while still having a full scale TCP. This making lwIP suitable for use
- in embedded systems with tens of kilobytes of free RAM and room for
- around 40 kilobytes of code ROM.
- FEATURES
- * IP (Internet Protocol) 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
- * UDP (User Datagram Protocol) including experimental UDP-lite extensions
- * TCP (Transmission Control Protocol) with congestion control, RTT estimation
- and fast recovery/fast retransmit
- * Specialized raw/native API for enhanced performance
- * Optional Berkeley-like socket API
- * DNS (Domain names resolver)
- * SNMP (Simple Network Management Protocol)
- * DHCP (Dynamic Host Configuration Protocol)
- * AUTOIP (for IPv4, conform with RFC 3927)
- * PPP (Point-to-Point Protocol)
- * ARP (Address Resolution Protocol) for Ethernet
- LICENSE
- lwIP is freely available under a BSD license.
- DEVELOPMENT
- lwIP has grown into an excellent TCP/IP stack for embedded devices,
- and developers using the stack often submit bug fixes, improvements,
- and additions to the stack to further increase its usefulness.
- Development of lwIP is hosted on Savannah, a central point for
- software development, maintenance and distribution. Everyone can
- help improve lwIP by use of Savannah's interface, CVS and the
- mailing list. A core team of developers will commit changes to the
- CVS source tree.
- The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and
- contributions (such as platform ports) are in the 'contrib' module.
- See doc/savannah.txt for details on CVS server access for users and
- developers.
- Last night's CVS tar ball can be downloaded from:
- http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
- The current CVS trees are web-browsable:
- http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/
- http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/
- Submit patches and bugs via the lwIP project page:
- http://savannah.nongnu.org/projects/lwip/
- DOCUMENTATION
- The original out-dated homepage of lwIP and Adam Dunkels' papers on
- lwIP are at the official lwIP home page:
- http://www.sics.se/~adam/lwip/
- Self documentation of the source code is regularly extracted from the
- current CVS sources and is available from this web page:
- http://www.nongnu.org/lwip/
- There is now a constantly growin wiki about lwIP at
- http://lwip.wikia.com/wiki/LwIP_Wiki
- Also, there are mailing lists you can subscribe at
- http://savannah.nongnu.org/mail/?group=lwip
- plus searchable archives:
- http://lists.nongnu.org/archive/html/lwip-users/
- http://lists.nongnu.org/archive/html/lwip-devel/
- Reading Adam's papers, the files in docs/, browsing the source code
- documentation and browsing the mailing list archives is a good way to
- become familiar with the design of lwIP.
- Adam Dunkels <adam@sics.se>
- Leon Woestenberg <leon.woestenberg@gmx.net>
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