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dd2fa15e8a
Added select() functionality to sockets library. Support for errno in sockets library. Byte ordering fixes. basic lwip_ioctl(), FIONREAD, get/setsockopt() etc. support - added additional argument to netif_add to pass state pointer so that the if_init function has access to context information before the interface is added, without accessing globals. - added netif_remove() - to conserve cpu load the tcpip_tcp_timer should only be active when tcbs that need it exist. - pass length of available data to callbacks for NETCONN_EVT_RCV events - added tcpip_link_input(), a hack to allow processing of PPP packets in tcpip_thread() context. This saves threads and context switches. - renamed incompatible ASSERT() macro to LWIP_ASSERT() to avoid name collision. - changed a bunch of %d's to %u's in format strings for unsigned values. - added ip_frag to lwip_stats. - changed IP_REASS_MAXAGE and IP_REASS_TMO defaults to more realistic values. - added sys_timeout_remove() function to cancel timeouts (needed by PPP amongst other things). - tolerate NULL returns from sys_arch_timeouts() since some threads might not need to use or have timeouts. - added sys_sem_wait_timeout() - moved mem_malloc() function to end of mem.c to work around tasking compiler bug. - automatically bind to local tcp port if 0. - allow customization of port ranges for automatic local bindings. - corrected various typos, spelling errors, etc.. Thanks to Marc Boucher for many of these changes.
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>