| 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 tenths of kilobytes of free RAM and room for |
| around 40 kilobytes of code ROM. |
| |
| lwIP features: |
| * IP (Internet Protocol) including packet forwarding over multiple |
| network interfaces |
| * ICMP (Internet Control Message Protocol) for network maintenance |
| and debugging |
| * UDP (User Datagram Protocol) including experimental UDP-lite |
| extensions |
| * TCP (Transmission Control Protocol) with congestion control, RTT |
| estimation and fast recovery/fast retransmit |
| * Specialized API for enhanced performance |
| * Optional Berkeley socket API |
| |
| lwIP is freely available under a BSD license. |
| |
| 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. A core team |
| will improve lwIP by the use of Savannah's interface and CVS. |
| |
| The current lwIP CVS tree can be checked out by doing: |
| cvs -d:pserver:anoncvs@subversions.gnu.org:/cvsroot/lwip login |
| cvs -z3 -d:pserver:anoncvs@subversions.gnu.org:/cvsroot/lwip co lwip |
| |
| Last night's CVS tar ball can be downloaded from: |
| http://savannah.gnu.org/cvs.backups/lwip.tar.gz |
| |
| The current CVS tree is web-browsable: |
| http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/ |
| |
| Submit patches and bugs via the lwIP project page: |
| http://savannah.nongnu.org/projects/lwip/ |
| |
| Stable releases have not been released yet. For development we |
| suggest downloading the latest CVS and keeping track of the |
| lwIP mailing list. |
| |
| The mailing list (with searchable archives), as well as Adam |
| Dunkels' papers on lwIP are at the official lwIP home page: |
| http://www.sics.se/~adam/lwip/ |
| |
| Reading Adam's papers 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> |
| |
