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3 lwIP is a small independent implementation of the TCP/IP protocol
4 suite that has been developed by Adam Dunkels at the Computer and
5 Networks Architectures (CNA) lab at the Swedish Institute of Computer
6 Science (SICS).
8 The focus of the lwIP TCP/IP implementation is to reduce the RAM usage
9 while still having a full scale TCP. This making lwIP suitable for use
10 in embedded systems with tens of kilobytes of free RAM and room for
11 around 40 kilobytes of code ROM.
15 * IP (Internet Protocol) including packet forwarding over multiple network
17 * ICMP (Internet Control Message Protocol) for network maintenance and debugging
18 * IGMP (Internet Group Management Protocol) for multicast traffic management
19 * UDP (User Datagram Protocol) including experimental UDP-lite extensions
20 * TCP (Transmission Control Protocol) with congestion control, RTT estimation
21 and fast recovery/fast retransmit
22 * Specialized raw/native API for enhanced performance
23 * Optional Berkeley-like socket API
24 * DNS (Domain names resolver)
25 * SNMP (Simple Network Management Protocol)
26 * DHCP (Dynamic Host Configuration Protocol)
27 * AUTOIP (for IPv4, conform with RFC 3927)
28 * PPP (Point-to-Point Protocol)
29 * ARP (Address Resolution Protocol) for Ethernet
33 lwIP is freely available under a BSD license.
37 lwIP has grown into an excellent TCP/IP stack for embedded devices,
38 and developers using the stack often submit bug fixes, improvements,
39 and additions to the stack to further increase its usefulness.
41 Development of lwIP is hosted on Savannah, a central point for
42 software development, maintenance and distribution. Everyone can
43 help improve lwIP by use of Savannah's interface, CVS and the
44 mailing list. A core team of developers will commit changes to the
45 CVS source tree.
47 The lwIP TCP/IP stack is maintained in the 'lwip' CVS module and
48 contributions (such as platform ports) are in the 'contrib' module.
50 See doc/savannah.txt for details on CVS server access for users and
53 Last night's CVS tar ball can be downloaded from:
54 http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
56 The current CVS trees are web-browsable:
60 Submit patches and bugs via the lwIP project page:
66 The original out-dated homepage of lwIP and Adam Dunkels' papers on
67 lwIP are at the official lwIP home page:
70 Self documentation of the source code is regularly extracted from the
71 current CVS sources and is available from this web page:
74 There is now a constantly growin wiki about lwIP at
77 Also, there are mailing lists you can subscribe at
79 plus searchable archives:
83 Reading Adam's papers, the files in docs/, browsing the source code
84 documentation and browsing the mailing list archives is a good way to
85 become familiar with the design of lwIP.
87 Adam Dunkels <firstname.lastname@example.org>
88 Leon Woestenberg <email@example.com>