lwIP
| Original author(s) | Adam Dunkels |
|---|---|
| Developer(s) | lwIP developers group |
| Stable release | 1.4.1 / 17 December 2012 |
| Development status | active |
| Written in | C |
| Operating system | multiple |
| Platform | embedded systems |
| Type | IP stack |
| License | Modified BSD license |
| Website | savannah |
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 worldwide 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),[1] Xilinx,[2] 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.[3] 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.
lwIP features
Internet layer
- 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
Transport layer
- UDP (User Datagram Protocol) including experimental UDP-Lite extensions
- TCP (Transmission Control Protocol) with congestion control, RTT estimation and fast recovery/fast retransmit
Application layer
- DNS (Domain names resolver)
- SNMP (Simple Network Management Protocol)
- DHCP (Dynamic Host Configuration Protocol)
Link layer
Other
- Specialized raw/native API for enhanced performance
- Optional Berkeley-like socket API
- AUTOIP / Link-local address (for IPv4, conforms with RFC 3927)
See also
References
- ↑ "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
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
External links
- Adam Dunkel's initial Lwip paper
- lwIP development
- lwIP documentation wiki
- lwIP functions documentation
- lwIP former homepage (obsolete)
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