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    1 INTRODUCTION
    2 
    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).
    7 
    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.
   12 
   13 FEATURES
   14 
   15   * IP (Internet Protocol) including packet forwarding over multiple network
   16     interfaces
   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
   30 
   31 LICENSE
   32 
   33 lwIP is freely available under a BSD license.
   34 
   35 DEVELOPMENT
   36 
   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.
   40 
   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.
   46 
   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.
   49 
   50 See doc/savannah.txt for details on CVS server access for users and
   51 developers.
   52 
   53 Last night's CVS tar ball can be downloaded from:
   54   http://savannah.gnu.org/cvs.backups/lwip.tar.gz [CHANGED - NEEDS FIXING]
   55 
   56 The current CVS trees are web-browsable:
   57   http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/lwip/
   58   http://savannah.nongnu.org/cgi-bin/viewcvs/lwip/contrib/
   59 
   60 Submit patches and bugs via the lwIP project page:
   61   http://savannah.nongnu.org/projects/lwip/
   62 
   63 
   64 DOCUMENTATION
   65 
   66 The original out-dated homepage of lwIP and Adam Dunkels' papers on
   67 lwIP are at the official lwIP home page:
   68   http://www.sics.se/~adam/lwip/
   69 
   70 Self documentation of the source code is regularly extracted from the
   71 current CVS sources and is available from this web page:
   72   http://www.nongnu.org/lwip/
   73 
   74 There is now a constantly growin wiki about lwIP at
   75   http://lwip.wikia.com/wiki/LwIP_Wiki
   76 
   77 Also, there are mailing lists you can subscribe at
   78   http://savannah.nongnu.org/mail/?group=lwip
   79 plus searchable archives:
   80   http://lists.nongnu.org/archive/html/lwip-users/
   81   http://lists.nongnu.org/archive/html/lwip-devel/
   82 
   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.
   86 
   87 Adam Dunkels <adam@sics.se>
   88 Leon Woestenberg <leon.woestenberg@gmx.net>
   89