diff --git a/CHANGELOG b/CHANGELOG new file mode 100644 index 00000000..9589e048 --- /dev/null +++ b/CHANGELOG @@ -0,0 +1,286 @@ +Changelog that precedes the move to Savannah: + +(0.5.3) Changes since version 0.5.2 + + ++ Bugfixes: + + * memp_malloc(MEMP_API_MSG) could fail with multiple application + threads because it wasn't protected by semaphores. + + ++ Other changes: + + * struct ip_addr now packed. + + * The name of the time variable in arp.c has been changed to ctime + to avoid conflicts with the time() function. + +(0.5.2) Changes since version 0.5.1 + + ++ New features: + + * A new TCP function, tcp_tmr(), now handles both TCP timers. + + ++ Bugfixes: + + * A bug in tcp_parseopt() could cause the stack to hang because of a + malformed TCP option. + + * The address of new connections in the accept() function in the BSD + socket library was not handled correctly. + + * pbuf_dechain() did not update the ->tot_len field of the tail. + + * Aborted TCP connections were not handled correctly in all + situations. + + ++ Other changes: + + * All protocol header structs are now packed. + + * The ->len field in the tcp_seg structure now counts the actual + amount of data, and does not add one for SYN and FIN segments. + +(0.5.1) Changes since version 0.5.0 + + ++ New features: + + * Possible to run as a user process under Linux. + + * Preliminary support for cross platform packed structs. + + * ARP timer now implemented. + + ++ Bugfixes: + + * TCP output queue length was badly initialized when opening + connections. + + * TCP delayed ACKs were not sent correctly. + + * Explicit initialization of BSS segment variables. + + * read() in BSD socket library could drop data. + + * Problems with memory alignment. + + * Situations when all TCP buffers were used could lead to + starvation. + + * TCP MSS option wasn't parsed correctly. + + * Problems with UDP checksum calculation. + + * IP multicast address tests had endianess problems. + + * ARP requests had wrong destination hardware address. + + ++ Other changes: + + * struct eth_addr changed from u16_t[3] array to u8_t[6]. + + * A ->linkoutput() member was added to struct netif. + + * TCP and UDP ->dest_* struct members where changed to ->remote_*. + + * ntoh* macros are now null definitions for big endian CPUs. + +(0.5.0) Changes since version 0.4.2 + + ++ New features: + + * Redesigned operating system emulation layer to make porting easier. + + * Better control over TCP output buffers. + + * Documenation added. + + ++ Bugfixes: + + * Locking issues in buffer management. + + * Bugfixes in the sequential API. + + * IP forwarding could cause memory leakage. This has been fixed. + + ++ Other changes: + + * Directory structure somewhat changed; the core/ tree has been + collapsed. + +(0.4.2) Changes since version 0.4.1 + + ++ New features: + + * Experimental ARP implementation added. + + * Skeleton Ethernet driver added. + + * Experimental BSD socket API library added. + + ++ Bugfixes: + + * In very intense situations, memory leakage could occur. This has + been fixed. + + ++ Other changes: + + * Variables named "data" and "code" have been renamed in order to + avoid name conflicts in certain compilers. + + * Variable++ have in appliciable cases been translated to ++variable + since some compilers generate better code in the latter case. + +(0.4.1) Changes since version 0.4 + + ++ New features: + + * TCP: Connection attempts time out earlier than data + transmissions. Nagle algorithm implemented. Push flag set on the + last segment in a burst. + + * UDP: experimental support for UDP-Lite extensions. + + ++ Bugfixes: + + * TCP: out of order segments were in some cases handled incorrectly, + and this has now been fixed. Delayed acknowledgements was broken + in 0.4, has now been fixed. Binding to an address that is in use + now results in an error. Reset connections sometimes hung an + application; this has been fixed. + + * Checksum calculation sometimes failed for chained pbufs with odd + lengths. This has been fixed. + + * API: a lot of bug fixes in the API. The UDP API has been improved + and tested. Error reporting and handling has been + improved. Logical flaws and race conditions for incoming TCP + connections has been found and removed. + + * Memory manager: alignment issues. Reallocating memory sometimes + failed, this has been fixed. + + * Generic library: bcopy was flawed and has been fixed. + + ++ Other changes: + + * API: all datatypes has been changed from generic ones such as + ints, to specified ones such as u16_t. Functions that return + errors now have the correct type (err_t). + + * General: A lot of code cleaned up and debugging code removed. Many + portability issues have been fixed. + + * The license was changed; the advertising clause was removed. + + * C64 port added. + + * Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri + Kosunen, Mikael Caleres, and Frits Wilmink for reporting and + fixing bugs! + +(0.4) Changes since version 0.3.1 + + * Memory management has been radically changed; instead of + allocating memory from a shared heap, memory for objects that are + rapidly allocated and deallocated is now kept in pools. Allocation + and deallocation from those memory pools is very fast. The shared + heap is still present but is used less frequently. + + * The memory, memory pool, and packet buffer subsystems now support + 4-, 2-, or 1-byte alignment. + + * "Out of memory" situations are handled in a more robust way. + + * Stack usage has been reduced. + + * Easier configuration of lwIP parameters such as memory usage, + TTLs, statistics gathering, etc. All configuration parameters are + now kept in a single header file "lwipopts.h". + + * The directory structure has been changed slightly so that all + architecture specific files are kept under the src/arch + hierarchy. + + * Error propagation has been improved, both in the protocol modules + and in the API. + + * The code for the RTXC architecture has been implemented, tested + and put to use. + + * Bugs have been found and corrected in the TCP, UDP, IP, API, and + the Internet checksum modules. + + * Bugs related to porting between a 32-bit and a 16-bit architecture + have been found and corrected. + + * The license has been changed slightly to conform more with the + original BSD license, including the advertisement clause. + +(0.3.1) Changes since version 0.3 + + * Fix of a fatal bug in the buffer management. Pbufs with allocated + RAM never returned the RAM when the pbuf was deallocated. + + * TCP congestion control, window updates and retransmissions did not + work correctly. This has now been fixed. + + * Bugfixes in the API. + +(0.3) Changes since version 0.2 + + * New and improved directory structure. All include files are now + kept in a dedicated include/ directory. + + * The API now has proper error handling. A new function, + netconn_err(), now returns an error code for the connection in + case of errors. + + * Improvements in the memory management subsystem. The system now + keeps a pointer to the lowest free memory block. A new function, + mem_malloc2() tries to allocate memory once, and if it fails tries + to free some memory and retry the allocation. + + * Much testing has been done with limited memory + configurations. lwIP now does a better job when overloaded. + + * Some bugfixes and improvements to the buffer (pbuf) subsystem. + + * Many bugfixes in the TCP code: + + - Fixed a bug in tcp_close(). + + - The TCP receive window was incorrectly closed when out of + sequence segments was received. This has been fixed. + + - Connections are now timed-out of the FIN-WAIT-2 state. + + - The initial congestion window could in some cases be too + large. This has been fixed. + + - The retransmission queue could in some cases be screwed up. This + has been fixed. + + - TCP RST flag now handled correctly. + + - Out of sequence data was in some cases never delivered to the + application. This has been fixed. + + - Retransmitted segments now contain the correct acknowledgment + number and advertised window. + + - TCP retransmission timeout backoffs are not correctly computed + (ala BSD). After a number of retransmissions, TCP now gives up + the connection. + + * TCP connections now are kept on three lists, one for active + connections, one for listening connections, and one for + connections that are in TIME-WAIT. This greatly speeds up the fast + timeout processing for sending delayed ACKs. + + * TCP now provides proper feedback to the application when a + connection has been successfully set up. + + * More comments have been added to the code. The code has also been + somewhat cleaned up. + +(0.2) Initial public release. diff --git a/COPYING b/COPYING new file mode 100644 index 00000000..e23898b5 --- /dev/null +++ b/COPYING @@ -0,0 +1,33 @@ +/* + * Copyright (c) 2001, 2002 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Adam Dunkels + * + */ + + diff --git a/FILES b/FILES new file mode 100644 index 00000000..636cdbfd --- /dev/null +++ b/FILES @@ -0,0 +1,7 @@ +src/ - The source code for the lwIP TCP/IP stack. + +proj/ - Makefiles and code for compiling lwIP. + +doc/ - Documentation on the lwIP APIs. + +See also the FILES file in each subdirectory. \ No newline at end of file diff --git a/README b/README new file mode 100644 index 00000000..ed0ee46d --- /dev/null +++ b/README @@ -0,0 +1,56 @@ +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 + +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 (and archives), as well as Adam Dunkels' papers +on lwIP can be found on the official lwIP home page, which is + http://www.sics.se/~adam/lwip/ + +Reading Adam Dunkels' papers and browsing the mailing list archives +is a good way to become familiar with the design of lwIP. + +Adam Dunkels +Leon Woestenberg +