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284
CHANGELOG
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284
CHANGELOG
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(0.5.3) Changes since version 0.5.2
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++ Bugfixes:
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* memp_malloc(MEMP_API_MSG) could fail with multiple application
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threads because it wasn't protected by semaphores.
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++ Other changes:
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* struct ip_addr now packed.
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* The name of the time variable in arp.c has been changed to ctime
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to avoid conflicts with the time() function.
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(0.5.2) Changes since version 0.5.1
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++ New features:
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* A new TCP function, tcp_tmr(), now handles both TCP timers.
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++ Bugfixes:
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* A bug in tcp_parseopt() could cause the stack to hang because of a
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malformed TCP option.
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* The address of new connections in the accept() function in the BSD
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socket library was not handled correctly.
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* pbuf_dechain() did not update the ->tot_len field of the tail.
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* Aborted TCP connections were not handled correctly in all
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situations.
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++ Other changes:
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* All protocol header structs are now packed.
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* The ->len field in the tcp_seg structure now counts the actual
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amount of data, and does not add one for SYN and FIN segments.
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(0.5.1) Changes since version 0.5.0
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++ New features:
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* Possible to run as a user process under Linux.
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* Preliminary support for cross platform packed structs.
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* ARP timer now implemented.
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++ Bugfixes:
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* TCP output queue length was badly initialized when opening
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connections.
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* TCP delayed ACKs were not sent correctly.
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* Explicit initialization of BSS segment variables.
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* read() in BSD socket library could drop data.
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* Problems with memory alignment.
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* Situations when all TCP buffers were used could lead to
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starvation.
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* TCP MSS option wasn't parsed correctly.
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* Problems with UDP checksum calculation.
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* IP multicast address tests had endianess problems.
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* ARP requests had wrong destination hardware address.
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++ Other changes:
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* struct eth_addr changed from u16_t[3] array to u8_t[6].
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* A ->linkoutput() member was added to struct netif.
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* TCP and UDP ->dest_* struct members where changed to ->remote_*.
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* ntoh* macros are now null definitions for big endian CPUs.
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(0.5.0) Changes since version 0.4.2
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++ New features:
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* Redesigned operating system emulation layer to make porting easier.
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* Better control over TCP output buffers.
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* Documenation added.
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++ Bugfixes:
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* Locking issues in buffer management.
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* Bugfixes in the sequential API.
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* IP forwarding could cause memory leakage. This has been fixed.
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++ Other changes:
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* Directory structure somewhat changed; the core/ tree has been
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collapsed.
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(0.4.2) Changes since version 0.4.1
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++ New features:
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* Experimental ARP implementation added.
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* Skeleton Ethernet driver added.
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* Experimental BSD socket API library added.
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++ Bugfixes:
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* In very intense situations, memory leakage could occur. This has
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been fixed.
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++ Other changes:
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* Variables named "data" and "code" have been renamed in order to
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avoid name conflicts in certain compilers.
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* Variable++ have in appliciable cases been translated to ++variable
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since some compilers generate better code in the latter case.
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(0.4.1) Changes since version 0.4
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++ New features:
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* TCP: Connection attempts time out earlier than data
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transmissions. Nagle algorithm implemented. Push flag set on the
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last segment in a burst.
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* UDP: experimental support for UDP-Lite extensions.
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++ Bugfixes:
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* TCP: out of order segments were in some cases handled incorrectly,
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and this has now been fixed. Delayed acknowledgements was broken
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in 0.4, has now been fixed. Binding to an address that is in use
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now results in an error. Reset connections sometimes hung an
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application; this has been fixed.
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* Checksum calculation sometimes failed for chained pbufs with odd
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lengths. This has been fixed.
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* API: a lot of bug fixes in the API. The UDP API has been improved
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and tested. Error reporting and handling has been
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improved. Logical flaws and race conditions for incoming TCP
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connections has been found and removed.
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* Memory manager: alignment issues. Reallocating memory sometimes
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failed, this has been fixed.
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* Generic library: bcopy was flawed and has been fixed.
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++ Other changes:
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* API: all datatypes has been changed from generic ones such as
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ints, to specified ones such as u16_t. Functions that return
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errors now have the correct type (err_t).
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* General: A lot of code cleaned up and debugging code removed. Many
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portability issues have been fixed.
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* The license was changed; the advertising clause was removed.
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* C64 port added.
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* Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri
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Kosunen, Mikael Caleres, and Frits Wilmink for reporting and
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fixing bugs!
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(0.4) Changes since version 0.3.1
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* Memory management has been radically changed; instead of
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allocating memory from a shared heap, memory for objects that are
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rapidly allocated and deallocated is now kept in pools. Allocation
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and deallocation from those memory pools is very fast. The shared
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heap is still present but is used less frequently.
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* The memory, memory pool, and packet buffer subsystems now support
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4-, 2-, or 1-byte alignment.
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* "Out of memory" situations are handled in a more robust way.
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* Stack usage has been reduced.
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* Easier configuration of lwIP parameters such as memory usage,
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TTLs, statistics gathering, etc. All configuration parameters are
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now kept in a single header file "lwipopts.h".
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* The directory structure has been changed slightly so that all
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architecture specific files are kept under the src/arch
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hierarchy.
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* Error propagation has been improved, both in the protocol modules
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and in the API.
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* The code for the RTXC architecture has been implemented, tested
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and put to use.
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* Bugs have been found and corrected in the TCP, UDP, IP, API, and
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the Internet checksum modules.
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* Bugs related to porting between a 32-bit and a 16-bit architecture
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have been found and corrected.
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* The license has been changed slightly to conform more with the
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original BSD license, including the advertisement clause.
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(0.3.1) Changes since version 0.3
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* Fix of a fatal bug in the buffer management. Pbufs with allocated
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RAM never returned the RAM when the pbuf was deallocated.
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* TCP congestion control, window updates and retransmissions did not
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work correctly. This has now been fixed.
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* Bugfixes in the API.
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(0.3) Changes since version 0.2
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* New and improved directory structure. All include files are now
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kept in a dedicated include/ directory.
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* The API now has proper error handling. A new function,
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netconn_err(), now returns an error code for the connection in
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case of errors.
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* Improvements in the memory management subsystem. The system now
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keeps a pointer to the lowest free memory block. A new function,
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mem_malloc2() tries to allocate memory once, and if it fails tries
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to free some memory and retry the allocation.
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* Much testing has been done with limited memory
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configurations. lwIP now does a better job when overloaded.
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* Some bugfixes and improvements to the buffer (pbuf) subsystem.
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* Many bugfixes in the TCP code:
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- Fixed a bug in tcp_close().
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- The TCP receive window was incorrectly closed when out of
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sequence segments was received. This has been fixed.
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- Connections are now timed-out of the FIN-WAIT-2 state.
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- The initial congestion window could in some cases be too
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large. This has been fixed.
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- The retransmission queue could in some cases be screwed up. This
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has been fixed.
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- TCP RST flag now handled correctly.
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- Out of sequence data was in some cases never delivered to the
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application. This has been fixed.
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- Retransmitted segments now contain the correct acknowledgment
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number and advertised window.
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- TCP retransmission timeout backoffs are not correctly computed
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(ala BSD). After a number of retransmissions, TCP now gives up
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the connection.
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* TCP connections now are kept on three lists, one for active
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connections, one for listening connections, and one for
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connections that are in TIME-WAIT. This greatly speeds up the fast
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timeout processing for sending delayed ACKs.
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* TCP now provides proper feedback to the application when a
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connection has been successfully set up.
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* More comments have been added to the code. The code has also been
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somewhat cleaned up.
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(0.2) Initial public release.
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