changelog

FreeRTOSV4.1.0 安裝文件 FreeRTOS 是一个源码公开的免费的嵌入式实时操作系统

FUTURE

  * TODO: The lwIP source code makes some invalid assumptions on processor
    word-length, storage sizes and alignment. See the mailing lists for
    problems with exoteric (/DSP) architectures showing these problems.
    We still have to fix some of these issues neatly.

  * TODO: the ARP layer is not protected against concurrent access. If
    you run from a multitasking OS, serialize access to ARP (called from
    your network device driver and from a timeout thread.)

HISTORY

(HEAD)

  2004-12-28 Leon Woestenberg <[e-mail]>
  * etharp.*: Disabled multiple packets on the ARP queue.
    This clashes with TCP queueing.

  2004-11-28 Leon Woestenberg <[e-mail]>
  * etharp.*: Fixed race condition from ARP request to ARP timeout.
    Halved the ARP period, doubled the period counts.
    ETHARP_MAX_PENDING now should be at least 2. This prevents
    the counter from reaching 0 right away (which would allow
    too little time for ARP responses to be received).
    
  2004-11-25 Leon Woestenberg <[e-mail]>
  * dhcp.c: Decline messages were not multicast but unicast.
  * etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD.
    Do not try hard to insert arbitrary packet's source address,
    etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD. 
    etharp_query() now always DOES call ETHARP_TRY_HARD so that users
    querying an address will see it appear in the cache (DHCP could
    suffer from this when a server invalidly gave an in-use address.)
  * ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are
    comparing network addresses (identifiers), not the network masks
    themselves.
  * ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given
    IP address actually belongs to the network of the given interface.

  2004-11-24 Kieran Mansley <[e-mail]>
  * tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state.

(STABLE-1_1_0-RC1)

  2004-10-16 Kieran Mansley <[e-mail]>
  * tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately,
	even if one is already pending, if the rcv_wnd is above a threshold
	(currently TCP_WND/2). This avoids waiting for a timer to expire to send a
	delayed ACK in order to open the window if the stack is only receiving data.

  2004-09-12 Kieran Mansley <[e-mail]>
  * tcp*.*: Retransmit time-out handling improvement by Sam Jansen.

  2004-08-20 Tony Mountifield <[e-mail]>
  * etharp.c: Make sure the first pbuf queued on an ARP entry
    is properly ref counted.

  2004-07-27 Tony Mountifield <[e-mail]>
  * debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler
    warnings about comparison.
  * pbuf.c: Stopped compiler complaining of empty if statement
    when LWIP_DEBUGF() empty.  Closed an unclosed comment.
  * tcp.c: Stopped compiler complaining of empty if statement
    when LWIP_DEBUGF() empty.
  * ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons().
  * inet.c: Added a couple of casts to quiet the compiler.
    No need to test isascii(c) before isdigit(c) or isxdigit(c).

  2004-07-22 Tony Mountifield <[e-mail]>
  * inet.c: Made data types consistent in inet_ntoa().
    Added casts for return values of checksum routines, to pacify compiler.
  * ip_frag.c, tcp_out.c, sockets.c, pbuf.c
    Small corrections to some debugging statements, to pacify compiler.

  2004-07-21 Tony Mountifield <[e-mail]>
  * etharp.c: Removed spurious semicolon and added missing end-of-comment.
  * ethernetif.c Updated low_level_output() to match prototype for
    netif->linkoutput and changed low_level_input() similarly for consistency.
  * api_msg.c: Changed recv_raw() from int to u8_t, to match prototype
    of raw_recv() in raw.h and so avoid compiler error.
  * sockets.c: Added trivial (int) cast to keep compiler happier.
  * ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros.
  
(STABLE-1_0_0)

  ++ Changes:

  2004-07-05 Leon Woestenberg <[e-mail]>
  * sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure
    your cc.h file defines this either 1 or 0. If non-defined,
    defaults to 1.
  * .c: Added <string.h> and <errno.h> includes where used.
  * etharp.c: Made some array indices unsigned.

  2004-06-27 Leon Woestenberg <[e-mail]>
  * netif.*: Added netif_set_up()/down().
  * dhcp.c: Changes to restart program flow.

  2004-05-07 Leon Woestenberg <[e-mail]>
  * etharp.c: In find_entry(), instead of a list traversal per candidate, do a
    single-pass lookup for different candidates. Should exploit locality.

  2004-04-29 Leon Woestenberg <[e-mail]>
  * tcp*.c: Cleaned up source comment documentation for Doxygen processing.
  * opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC.
  * etharp.c: update_arp_entry() only adds new ARP entries when adviced to by
    the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option.

  ++ Bug fixes:

  2004-04-27 Leon Woestenberg <[e-mail]>
  * etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution
    suggested by Timmy Brolin. Fix for 32-bit processors that cannot access
    non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix
    is to prefix the 14-bit Ethernet headers with two padding bytes.

  2004-04-23 Leon Woestenberg <[e-mail]>
  * ip_addr.c: Fix in the ip_addr_isbroadcast() check.
  * etharp.c: Fixed the case where the packet that initiates the ARP request
    is not queued, and gets lost. Fixed the case where the packets destination
    address is already known; we now always queue the packet and perform an ARP
    request.
  
(STABLE-0_7_0)

  ++ Bug fixes:

  * Fixed TCP bug for SYN_SENT to ESTABLISHED state transition.
  * Fixed TCP bug in dequeueing of FIN from out of order segment queue.
  * Fixed two possible NULL references in rare cases.

(STABLE-0_6_6)

  ++ Bug fixes:

  * Fixed DHCP which did not include the IP address in DECLINE messages.

  ++ Changes:

  * etharp.c has been hauled over a bit.

(STABLE-0_6_5)

  ++ Bug fixes:

  * Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic.
  * Packets sent from ARP queue had invalid source hardware address.

  ++ Changes:

  * Pass-by ARP requests do now update the cache.

  ++ New features:

  * No longer dependent on ctype.h.
  * New socket options.
  * Raw IP pcb support.

(STABLE-0_6_4)

  ++ Bug fixes:

  * Some debug formatters and casts fixed.
  * Numereous fixes in PPP.

  ++ Changes:

  * DEBUGF now is LWIP_DEBUGF
  * pbuf_dechain() has been re-enabled.
  * Mentioned the changed use of CVS branches in README.

(STABLE-0_6_3)

  ++ Bug fixes:

  * Fixed pool pbuf memory leak in pbuf_alloc().
    Occured if not enough PBUF_POOL pbufs for a packet pbuf chain.
    Reported by Savin Zlobec.

  * PBUF_POOL chains had their tot_len field not set for non-first
    pbufs. Fixed in pbuf_alloc().

  ++ New features:

  * Added PPP stack contributed by Marc Boucher

  ++ Changes:

  * Now drops short packets for ICMP/UDP/TCP protocols. More robust.

  * ARP queueuing now queues the latest packet instead of the first.
    This is the RFC recommended behaviour, but can be overridden in
    lwipopts.h.

(0.6.2)

  ++ Bugfixes:

  * TCP has been fixed to deal with the new use of the pbuf->ref
    counter.

  * DHCP dhcp_inform() crash bug fixed.

  ++ Changes:

  * Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed
    pbuf_refresh(). This has sped up pbuf pool operations considerably.
    Implemented by David Haas.

(0.6.1)

  ++ New features:

  * The packet buffer implementation has been enhanced to support
    zero-copy and copy-on-demand for packet buffers which have their
    payloads in application-managed memory.
    Implemented by David Haas.

    Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy
    if an outgoing packet can be directly sent on the link, or perform
    a copy-on-demand when necessary.

    The application can safely assume the packet is sent, and the RAM
    is available to the application directly after calling udp_send()
    or similar function.

  ++ Bugfixes:

  * ARP_QUEUEING should now correctly work for all cases, including
    PBUF_REF.
    Implemented by Leon Woestenberg.

  ++ Changes:

  * IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer
    to a '0.0.0.0' IP address.

  * The packet buffer implementation is changed. The pbuf->ref counter
    meaning has changed, and several pbuf functions have been
    adapted accordingly.

  * netif drivers have to be changed to set the hardware address length field
    that must be initialized correctly by the driver (hint: 6 for Ethernet MAC).
    See the contrib/ports/c16x cs8900 driver as a driver example.

  * netif's have a dhcp field that must be initialized to NULL by the driver.
    See the contrib/ports/c16x cs8900 driver as a driver example.

(0.5.x) This file has been unmaintained up to 0.6.1. All changes are
  logged in CVS but have not been explained here.

(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: