|Original author(s)||Adam Dunkels|
|Developer(s)||lwIP developers group|
|Stable release||1.4.1 / 17 December 2012|
|License||Modified BSD license|
lwIP (lightweight IP) is a widely used open source TCP/IP stack designed for embedded systems. lwIP was originally developed by Adam Dunkels at the Swedish Institute of Computer Science and is now developed and maintained by a world wide network of developers.
lwIP is used by many manufacturers of embedded systems. Examples include Altera (in the Nios II operating system), Analog Devices (for the Blackfin DSP chip), Xilinx, Honeywell (for some of their FAA certified avionics systems) and Freescale Semiconductor (Ethernet Streaming SW for Automotive microcontrollers).
The focus of the lwIP TCP/IP implementation is to reduce resource usage while still having a full-scale TCP. This makes lwIP suitable for use in embedded systems with tens of kilobytes of free RAM and room for around 40 kilobytes of code ROM.
- 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
- DNS (Domain names resolver)
- SNMP (Simple Network Management Protocol)
- DHCP (Dynamic Host Configuration Protocol)
- Specialized raw/native API for enhanced performance
- Optional Berkeley-like socket API
- AUTOIP / Link-local address (for IPv4, conforms with RFC 3927)
- "Building Complex VDK/LwIP Applications Using Blackfin Processors ", Kaushal Sanghai, Analog Devices Inc. September 2008
- Siva Velusamy, LightWeight IP (lwIP) Application Examples, Xilinx Inc. June 2009
- (ed.), Yanwen Wu (2010). Software engineering and knowledge engineering : theory and practice. Berlin: Springer. p. 639. ISBN 978-3-642-03717-7.
- lwIP development
- lwIP documentation wiki
- lwIP functions documentation
- lwIP former homepage (obsolete)
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