short and also was generated wrong if checksum coverage != tot_len;
    receive: checksum was calculated wrong if checksum coverage != tot_len

  2007-10-08 Simon Goldschmidt
  * mem.c: lfree was not updated in mem_realloc!

  2007-10-07 Fr閐閞ic Bernon
  * sockets.c, api.h, api_lib.c: First step to fix "bug #20900 : Potential
    crash error problem with netconn_peer & netconn_addr". VERY IMPORTANT:
    this change cause an API breakage for netconn_addr, since a parameter
    type change. Any compiler should cause an error without any changes in
    yours netconn_peer calls (so, it can't be a "silent change"). It also
    reduce a little bit the footprint for socket layer (lwip_getpeername &
    lwip_getsockname use now a common lwip_getaddrname function since 
    netconn_peer & netconn_addr have the same parameters).

  2007-09-20 Simon Goldschmidt
  * tcp.c: Fixed bug #21080 (tcp_bind without check pcbs in TIME_WAIT state)
    by checking  tcp_tw_pcbs also

  2007-09-19 Simon Goldschmidt
  * icmp.c: Fixed bug #21107 (didn't reset IP TTL in ICMP echo replies)

  2007-09-15 Mike Kleshov
  * mem.c: Fixed bug #21077 (inaccuracy in calculation of lwip_stat.mem.used)

  2007-09-06 Fr閐閞ic Bernon
  * several-files: replace some #include "arch/cc.h" by "lwip/arch.h", or simply remove
    it as long as "lwip/opt.h" is included before (this one include "lwip/debug.h" which
    already include "lwip/arch.h"). Like that, default defines are provided by "lwip/arch.h"
    if they are not defined in cc.h, in the same spirit than "lwip/opt.h" for lwipopts.h.

  2007-08-30 Fr閐閞ic Bernon
  * igmp.h, igmp.c: Some changes to remove some redundant code, add some traces, 
    and fix some coding style.

  2007-08-28 Fr閐閞ic Bernon
  * tcpip.c: Fix TCPIP_MSG_INPKT processing: now, tcpip_input can be used for any
    kind of packets. These packets are considered like Ethernet packets (payload 
    pointing to ethhdr) if the netif got the NETIF_FLAG_ETHARP flag. Else, packets 
    are considered like IP packets (payload pointing to iphdr).

  2007-08-27 Fr閐閞ic Bernon
  * api.h, api_lib.c, api_msg.c: First fix for "bug #20900 : Potential crash error
    problem with netconn_peer & netconn_addr". Introduce NETCONN_LISTEN netconn_state
    and remove obsolete ones (NETCONN_RECV & NETCONN_ACCEPT).

  2007-08-24 Kieran Mansley
  * inet.c Modify (acc >> 16) test to ((acc >> 16) != 0) to help buggy
    compiler (Paradigm C++)

  2007-08-09 Fr閐閞ic Bernon, Bill Florac
  * stats.h, stats.c, igmp.h, igmp.c, opt.h: Fix for bug #20503 : IGMP Improvement.
    Introduce IGMP_STATS to centralize statistics management.

  2007-08-09 Fr閐閞ic Bernon, Bill Florac
  * udp.c: Fix for bug #20503 : IGMP Improvement. Enable to receive a multicast
    packet on a udp pcb binded on an netif's IP address, and not on "any".

  2007-08-09 Fr閐閞ic Bernon, Bill Florac
  * igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement.
    This is mainly on using lookup/lookfor, and some coding styles...

  2007-07-26 Fr閐閞ic Bernon (and "thedoctor")
  * igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.

  2007-07-25 Simon Goldschmidt
  * api_msg.c, tcp.c: Another fix for bug #20021: by not returning an error if
    tcp_output fails in tcp_close, the code in do_close_internal gets simpler
    (tcp_output is called again later from tcp timers).

  2007-07-25 Simon Goldschmidt
  * ip_frag.c: Fixed bug #20429: use the new pbuf_copy_partial instead of the old
    copy_from_pbuf, which illegally modified the given pbuf.

  2007-07-25 Simon Goldschmidt
  * tcp_out.c: tcp_enqueue: pcb->snd_queuelen didn't work for chaine PBUF_RAMs:
    changed snd_queuelen++ to snd_queuelen += pbuf_clen(p).

  2007-07-24 Simon Goldschmidt
  * api_msg.c, tcp.c: Fix bug #20480: Check the pcb passed to tcp_listen() for the
    correct state (must be CLOSED).

  2007-07-13 Thomas Taranowski (commited by Jared Grubb)
  * memp.c: Fix bug #20478: memp_malloc returned NULL+MEMP_SIZE on failed
    allocation. It now returns NULL.

  2007-07-13 Fr閐閞ic Bernon
  * api_msg.c: Fix bug #20318: api_msg "recv" callbacks don't call pbuf_free in
    all error cases.

  2007-07-13 Fr閐閞ic Bernon
  * api_msg.c: Fix bug #20315: possible memory leak problem if tcp_listen failed,
    because current code doesn't follow rawapi.txt documentation.

  2007-07-13 Kieran Mansley
  * src/core/tcp_in.c Apply patch#5741 from Oleg Tyshev to fix bug in
    out of sequence processing of received packets

  2007-07-03 Simon Goldschmidt
  * nearly-all-files: Added assertions where PBUF_RAM pbufs are used and an
    assumption is made that this pbuf is in one piece (i.e. not chained). These
    assumptions clash with the possibility of converting to fully pool-based
    pbuf implementations, where PBUF_RAM pbufs might be chained.

  2007-07-03 Simon Goldschmidt
  * api.h, api_lib.c, api_msg.c: Final fix for bug #20021 and some other problems
    when closing tcp netconns: removed conn->sem, less context switches when
    closing, both netconn_close and netconn_delete should safely close tcp
    connections.

  2007-07-02 Simon Goldschmidt
  * ipv4/ip.h, ipv6/ip.h, opt.h, netif.h, etharp.h, ipv4/ip.c, netif.c, raw.c,
    tcp_out.c, udp.c, etharp.c: Added option LWIP_NETIF_HWADDRHINT (default=off)
    to cache ARP table indices with each pcb instead of single-entry cache for
    the complete stack.

  2007-07-02 Simon Goldschmidt
  * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Added some ASSERTS and casts to prevent
    warnings when assigning to smaller types.

  2007-06-28 Simon Goldschmidt
  * tcp_out.c: Added check to prevent tcp_pcb->snd_queuelen from overflowing.

  2007-06-28 Simon Goldschmidt
  * tcp.h: Fixed bug #20287: Fixed nagle algorithm (sending was done too early if
    a segment contained chained pbufs)

  2007-06-28 Fr閐閞ic Bernon
  * autoip.c: replace most of rand() calls by a macro LWIP_AUTOIP_RAND which compute
    a "pseudo-random" value based on netif's MAC and some autoip fields. It's always
    possible to define this macro in your own lwipopts.h to always use C library's
    rand(). Note that autoip_create_rand_addr doesn't use this macro.

  2007-06-28 Fr閐閞ic Bernon
  * netifapi.h, netifapi.c, tcpip.h, tcpip.c: Update code to handle the option
    LWIP_TCPIP_CORE_LOCKING, and do some changes to be coherent with last modifications
    in api_lib/api_msg (use pointers and not type with table, etc...) 

  2007-06-26 Simon Goldschmidt
  * udp.h: Fixed bug #20259: struct udp_hdr was lacking the packin defines.

  2007-06-25 Simon Goldschmidt
  * udp.c: Fixed bug #20253: icmp_dest_unreach was called with a wrong p->payload
    for udp packets with no matching pcb.

  2007-06-25 Simon Goldschmidt
  * udp.c: Fixed bug #20220: UDP PCB search in udp_input(): a non-local match
    could get udp input packets if the remote side matched.

  2007-06-13 Simon Goldschmidt
  * netif.c: Fixed bug #20180 (TCP pcbs listening on IP_ADDR_ANY could get
    changed in netif_set_ipaddr if previous netif->ip_addr.addr was 0.

  2007-06-13 Simon Goldschmidt
  * api_msg.c: pcb_new sets conn->err if protocol is not implemented
    -> netconn_new_..() does not allocate a new connection for unsupported
    protocols.

  2007-06-13 Fr閐閞ic Bernon, Simon Goldschmidt
  * api_lib.c: change return expression in netconn_addr and netconn_peer, because
    conn->err was reset to ERR_OK without any reasons (and error was lost)...

  2007-06-13 Fr閐閞ic Bernon, Matthias Weisser
  * opt.h, mem.h, mem.c, memp.c, pbuf.c, ip_frag.c, vj.c: Fix bug #20162. Rename
    MEM_ALIGN in LWIP_MEM_ALIGN and MEM_ALIGN_SIZE in LWIP_MEM_ALIGN_SIZE to avoid
    some macro names collision with some OS macros.

  2007-06-11 Simon Goldschmidt
  * udp.c: UDP Lite: corrected the use of chksum_len (based on RFC3828: if it's 0,
    create checksum over the complete packet. On RX, if it's < 8 (and not 0),
    discard the packet. Also removed the duplicate 'udphdr->chksum = 0' for both
    UDP & UDP Lite.

  2007-06-11 Srinivas Gollakota & Oleg Tyshev
  * tcp_out.c: Fix for bug #20075 : "A problem with keep-alive timer and TCP flags"
    where TCP flags wasn't initialized in tcp_keepalive.

  2007-06-03 Simon Goldschmidt
  * udp.c: udp_input(): Input pbuf was not freed if pcb had no recv function
    registered, p->payload was modified without modifying p->len if sending
    icmp_dest_unreach() (had no negative effect but was definitively wrong).

  2007-06-03 Simon Goldschmidt
  * icmp.c: Corrected bug #19937: For responding to an icmp echo request, icmp
    re-used the input pbuf even if that didn't have enough space to include the
    link headers. Now the space is tested and a new pbuf is allocated for the
    echo response packet if the echo request pbuf isn't big enough.

  2007-06-01 Simon Goldschmidt
  * sockets.c: Checked in patch #5914: Moved sockopt processing into tcpip_thread.

  2007-05-23 Fr閐閞ic Bernon
  * api_lib.c, sockets.c: Fixed bug #5958 for netconn_listen (acceptmbox only
    allocated by do_listen if success) and netconn_accept errors handling. In
    most of api_lib functions, we replace some errors checkings like "if (conn==NULL)"
    by ASSERT, except for netconn_delete.

  2007-05-23 Fr閐閞ic Bernon
  * api_lib.c: Fixed bug #5957 "Safe-thread problem inside netconn_recv" to return
    an error code if it's impossible to fetch a pbuf on a TCP connection (and not
    directly close the recvmbox).

  2007-05-22 Simon Goldschmidt
  * tcp.c: Fixed bug #1895 (tcp_bind not correct) by introducing a list of
    bound but unconnected (and non-listening) tcp_pcbs.

  2007-05-22 Fr閐閞ic Bernon
  * sys.h, sys.c, api_lib.c, tcpip.c: remove sys_mbox_fetch_timeout() (was only
    used for LWIP_SO_RCVTIMEO option) and use sys_arch_mbox_fetch() instead of
    sys_mbox_fetch() in api files. Now, users SHOULD NOT use internal lwIP features
    like "sys_timeout" in their application threads.

  2007-05-22 Fr閐閞ic Bernon
  * api.h, api_lib.c, api_msg.h, api_msg.c: change the struct api_msg_msg to see
    which parameters are used by which do_xxx function, and to avoid "misusing"
    parameters (patch #5938).

  2007-05-22 Simon Goldschmidt
  * api_lib.c, api_msg.c, raw.c, api.h, api_msg.h, raw.h: Included patch #5938:
    changed raw_pcb.protocol from u16_t to u8_t since for IPv4 and IPv6, proto
    is only 8 bits wide. This affects the api, as there, the protocol was
    u16_t, too.

  2007-05-18 Simon Goldschmidt
  * memp.c: addition to patch #5913: smaller pointer was returned but
    memp_memory was the same size -> did not save memory.

  2007-05-16 Simon Goldschmidt
  * loopif.c, slipif.c: Fix bug #19729: free pbuf if netif->input() returns
    != ERR_OK.

  2007-05-16 Simon Goldschmidt
  * api_msg.c, udp.c: If a udp_pcb has a local_ip set, check if it is the same
    as the one of the netif used for sending to prevent sending from old
    addresses after a netif address gets changed (partly fixes bug #3168).

  2007-05-16 Fr閐閞ic Bernon
  * tcpip.c, igmp.h, igmp.c: Fixed bug "#19800 : IGMP: igmp_tick() will not work
    with NO_SYS=1". Note that igmp_init is always in tcpip_thread (and not in 
    tcpip_init) because we have to be sure that network interfaces are already
    added (mac filter is updated only in igmp_init for the moment).

  2007-05-16 Simon Goldschmidt
  * mem.c, memp.c: Removed semaphores from memp, changed sys_sem_wait calls
    into sys_arch_sem_wait calls to prevent timers from running while waiting
    for the heap. This fixes bug #19167.

  2007-05-13 Simon Goldschmidt
  * tcp.h, sockets.h, sockets.c: Fixed bug from patch #5865 by moving the defines
    for socket options (lwip_set/-getsockopt) used with level IPPROTO_TCP from
    tcp.h to sockets.h.

  2007-05-07 Simon Goldschmidt
  * mem.c: Another attempt to fix bug #17922.

  2007-05-04 Simon Goldschmidt
  * pbuf.c, pbuf.h, etharp.c: Further update to ARP queueing: Changed pbuf_copy()
    implementation so that it can be reused (don't allocate the target
    pbuf inside pbuf_copy()).

  2007-05-04 Simon Goldschmidt
  * memp.c: checked in patch #5913: in memp_malloc() we can return memp as mem
    to save a little RAM (next pointer of memp is not used while not in pool).

  2007-05-03 "maq"
  * sockets.c: Fix ioctl FIONREAD when some data remains from last recv.
    (patch #3574).

  2007-04-23 Simon Goldschmidt
  * loopif.c, loopif.h, opt.h, src/netif/FILES: fix bug #2595: "loopif results
    in NULL reference for incoming TCP packets". Loopif has to be configured
    (using LWIP_LOOPIF_MULTITHREADING) to directly call