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 PPP code is broken in a few ways. There are namespace
    collisions on BSD systems and many assumptions on word-length
    (sizeof(int)). In ppp.c an assumption is made on the availability of
    a thread subsystem. Either PPP needs to be moved to contrib/ports/???
    or rearranged to be more generic.

HISTORY

(CVS HEAD)

  * [Enter new changes just after this line - do not remove this line]

  ++ New features:

  ++ Bugfixes:


(STABLE-1.3.1)

  ++ New features:

  2009-05-10 Simon Goldschmidt
  * opt.h, sockets.c, pbuf.c, netbuf.h, pbuf.h: task #7013: Added option
    LWIP_NETIF_TX_SINGLE_PBUF to try to create transmit packets from only
    one pbuf to help MACs that don't support scatter-gather DMA.

  2009-05-09 Simon Goldschmidt
  * icmp.h, icmp.c: Shrinked ICMP code, added option to NOT check icoming
    ECHO pbuf for size (just use it): LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN

  2009-05-05 Simon Goldschmidt, Jakob Stoklund Olesen
  * ip.h, ip.c: Added ip_current_netif() & ip_current_header() to receive
    extended info about the currently received packet.

  2009-04-27 Simon Goldschmidt
  * sys.h: Made SYS_LIGHTWEIGHT_PROT and sys_now() work with NO_SYS=1

  2009-04-25 Simon Goldschmidt
  * mem.c, opt.h: Added option MEM_USE_POOLS_TRY_BIGGER_POOL to try the next
    bigger malloc pool if one is empty (only usable with MEM_USE_POOLS).

  2009-04-21 Simon Goldschmidt
  * dns.c, init.c, dns.h, opt.h: task #7507, patch #6786: DNS supports static
    hosts table. New configuration options DNS_LOCAL_HOSTLIST and
    DNS_LOCAL_HOSTLIST_IS_DYNAMIC. Also, DNS_LOOKUP_LOCAL_EXTERN() can be defined
    as an external function for lookup.

  2009-04-15 Simon Goldschmidt
  * dhcp.c: patch #6763: Global DHCP XID can be redefined to something more unique

  2009-03-31 Kieran Mansley
  * tcp.c, tcp_out.c, tcp_in.c, sys.h, tcp.h, opts.h: add support for
    TCP timestamp options, off by default.  Rework tcp_enqueue() to
    take option flags rather than specified option data

  2009-02-18 Simon Goldschmidt
  * cc.h: Added printf formatter for size_t: SZT_F

  2009-02-16 Simon Goldschmidt (patch by Rishi Khan)
  * icmp.c, opt.h: patch #6539: (configurable) response to broadcast- and multicast
    pings

  2009-02-12 Simon Goldschmidt
  * init.h: Added LWIP_VERSION to get the current version of the stack

  2009-02-11 Simon Goldschmidt (suggested by Gottfried Spitaler)
  * opt.h, memp.h/.c: added MEMP_MEM_MALLOC to use mem_malloc/mem_free instead
    of the pool allocator (can save code size with MEM_LIBC_MALLOC if libc-malloc
    is otherwise used)

  2009-01-28 Jonathan Larmour (suggested by Bill Bauerbach)
  * ipv4/inet_chksum.c, ipv4/lwip/inet_chksum.h: inet_chksum_pseudo_partial()
  is only used by UDPLITE at present, so conditionalise it.

  2008-12-03 Simon Goldschmidt (base on patch from Luca Ceresoli)
  * autoip.c: checked in (slightly modified) patch #6683: Customizable AUTOIP
    "seed" address. This should reduce AUTOIP conflicts if
    LWIP_AUTOIP_CREATE_SEED_ADDR is overridden.

  2008-10-02 Jonathan Larmour and Rishi Khan
  * sockets.c (lwip_accept): Return EWOULDBLOCK if would block on non-blocking
    socket.

  2008-06-30 Simon Goldschmidt
  * mem.c, opt.h, stats.h: fixed bug #21433: Calling mem_free/pbuf_free from
    interrupt context isn't safe: LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT allows
    mem_free to run between mem_malloc iterations. Added illegal counter for
    mem stats.

  2008-06-27 Simon Goldschmidt
  * stats.h/.c, some other files: patch #6483: stats module improvement:
    Added defines to display each module's statistic individually, added stats
    defines for MEM, MEMP and SYS modules, removed (unused) rexmit counter.

  2008-06-17 Simon Goldschmidt
  * err.h: patch #6459: Made err_t overridable to use a more efficient type
    (define LWIP_ERR_T in cc.h)

  2008-06-17 Simon Goldschmidt
  * slipif.c: patch #6480: Added a configuration option for slipif for symmetry
    to loopif

  2008-06-17 Simon Goldschmidt (patch by Luca Ceresoli)
  * netif.c, loopif.c, ip.c, netif.h, loopif.h, opt.h: Checked in slightly
    modified version of patch # 6370: Moved loopif code to netif.c so that
    loopback traffic is supported on all netifs (all local IPs).
    Added option to limit loopback packets for each netifs.


  ++ Bugfixes:
  2009-08-12 Kieran Mansley
  * tcp_in.c, tcp.c: Fix bug #27209: handle trimming of segments when
    out of window or out of order properly

  2009-08-12 Kieran Mansley
  * tcp_in.c: Fix bug #27199: use snd_wl2 instead of snd_wl1

  2009-07-28 Simon Goldschmidt
  * mem.h: Fixed bug #27105: "realloc() cannot replace mem_realloc()"s

  2009-07-27 Kieran Mansley
  * api.h api_msg.h netdb.h sockets.h: add missing #include directives

  2009-07-09 Kieran Mansley
  * api_msg.c, sockets.c, api.h: BUG23240 use signed counters for
    recv_avail and don't increment counters until message successfully
    sent to mbox

  2009-06-25 Kieran Mansley
  * api_msg.c api.h: BUG26722: initialise netconn write variables 
    in netconn_alloc

  2009-06-25 Kieran Mansley
  * tcp.h: BUG26879: set ret value in TCP_EVENT macros when function is not set

  2009-06-25 Kieran Mansley
  * tcp.c, tcp_in.c, tcp_out.c, tcp.h: BUG26301 and BUG26267: correct
    simultaneous close behaviour, and make snd_nxt have the same meaning 
    as in the RFCs.

  2009-05-12 Simon Goldschmidt
  * etharp.h, etharp.c, netif.c: fixed bug #26507: "Gratuitous ARP depends on
    arp_table / uses etharp_query" by adding etharp_gratuitous()

  2009-05-12 Simon Goldschmidt
  * ip.h, ip.c, igmp.c: bug #26487: Added ip_output_if_opt that can add IP options
    to the IP header (used by igmp_ip_output_if)

  2009-05-06 Simon Goldschmidt
  * inet_chksum.c: On little endian architectures, use LWIP_PLATFORM_HTONS (if
    defined) for SWAP_BYTES_IN_WORD to speed up checksumming.

  2009-05-05 Simon Goldschmidt
  * sockets.c: bug #26405: Prematurely released semaphore causes lwip_select()
    to crash

  2009-05-04 Simon Goldschmidt
  * init.c: snmp was not initialized in lwip_init()

  2009-05-04 Fr閐閞ic Bernon
  * dhcp.c, netbios.c: Changes if IP_SOF_BROADCAST is enabled.

  2009-05-03 Simon Goldschmidt
  * tcp.h: bug #26349: Nagle algorithm doesn't send although segment is full
    (and unsent->next == NULL)

  2009-05-02 Simon Goldschmidt
  * tcpip.h, tcpip.c: fixed tcpip_untimeout (does not need the time, broken after
    1.3.0 in CVS only) - fixes compilation of ppp_oe.c

  2009-05-02 Simon Goldschmidt
  * msg_in.c: fixed bug #25636: SNMPSET value is ignored for integer fields

  2009-05-01 Simon Goldschmidt
  * pap.c: bug #21680: PPP upap_rauthnak() drops legal NAK packets

  2009-05-01 Simon Goldschmidt
  * ppp.c: bug #24228: Memory corruption with PPP and DHCP

  2009-04-29 Fr閐閞ic Bernon
  * raw.c, udp.c, init.c, opt.h, ip.h, sockets.h: bug #26309: Implement the
    SO(F)_BROADCAST filter for all API layers. Avoid the unindented reception
    of broadcast packets even when this option wasn't set. Port maintainers
    which want to enable this filter have to set IP_SOF_BROADCAST=1 in opt.h.
    If you want this option also filter broadcast on recv operations, you also
    have to set IP_SOF_BROADCAST_RECV=1 in opt.h.

  2009-04-28 Simon Goldschmidt, Jakob Stoklund Olesen
  * dhcp.c: patch #6721, bugs #25575, #25576: Some small fixes to DHCP and
    DHCP/AUTOIP cooperation

  2009-04-25 Simon Goldschmidt, Oleg Tyshev
  * tcp_out.c: bug #24212: Deadlocked tcp_retransmit due to exceeded pcb->cwnd
    Fixed by sorting the unsent and unacked queues (segments are inserted at the
    right place in tcp_output and tcp_rexmit).

  2009-04-25 Simon Goldschmidt
  * memp.c, mem.c, memp.h, mem_std.h: bug #26213 "Problem with memory allocation
    when debugging": memp_sizes contained the wrong sizes (including sanity
    regions); memp pools for MEM_USE_POOLS were too small

  2009-04-24 Simon Goldschmidt, Fr閐閞ic Bernon
  * inet.c: patch #6765: Fix a small problem with the last changes (incorrect
    behavior, with with ip address string not ended by a '\0', a space or a
    end of line)

  2009-04-19 Simon Goldschmidt
  * rawapi.txt: Fixed bug #26069: Corrected documentation: if tcp_connect fails,
    pcb->err is called, not pcb->connected (with an error code).

  2009-04-19 Simon Goldschmidt
  * tcp_out.c: Fixed bug #26236: "TCP options (timestamp) don't work with
    no-copy-tcpwrite": deallocate option data, only concat segments with same flags

  2009-04-19 Simon Goldschmidt
  * tcp_out.c: Fixed bug #25094: "Zero-length pbuf" (options are now allocated
    in the header pbuf, not the data pbuf)

  2009-04-18 Simon Goldschmidt
  * api_msg.c: fixed bug #25695: Segmentation fault in do_writemore()

  2009-04-15 Simon Goldschmidt
  * sockets.c: tried to fix bug #23559: lwip_recvfrom problem with tcp

  2009-04-15 Simon Goldschmidt
  * dhcp.c: task #9192: mem_free of dhcp->options_in and dhcp->msg_in

  2009-04-15 Simon Goldschmidt
  * ip.c, ip6.c, tcp_out.c, ip.h: patch #6808: Add a utility function
    ip_hinted_output() (for smaller code mainly)

  2009-04-15 Simon Goldschmidt
  * inet.c: patch #6765: Supporting new line characters in inet_aton()

  2009-04-15 Simon Goldschmidt
  * dhcp.c: patch #6764: DHCP rebind and renew did not send hostnam option;
    Converted constant OPTION_MAX_MSG_SIZE to netif->mtu, check if netif->mtu
    is big enough in dhcp_start

  2009-04-15 Simon Goldschmidt
  * netbuf.c: bug #26027: netbuf_chain resulted in pbuf memory leak

  2009-04-15 Simon Goldschmidt
  * sockets.c, ppp.c: bug #25763: corrected 4 occurrences of SMEMCPY to MEMCPY

  2009-04-15 Simon Goldschmidt
  * sockets.c: bug #26121: set_errno can be overridden

  2009-04-09 Kieran Mansley (patch from Luca Ceresoli <lucaceresoli>)
  * init.c, opt.h: Patch#6774 TCP_QUEUE_OOSEQ breaks compilation when
    LWIP_TCP==0

  2009-04-09 Kieran Mansley (patch from Roy Lee <roylee17>)
  * tcp.h: Patch#6802 Add do-while-clauses to those function like
    macros in tcp.h

  2009-03-31 Kieran Mansley
  * tcp.c, tcp_in.c, tcp_out.c, tcp.h, opt.h: Rework the way window
    updates are calculated and sent (BUG20515)

  * tcp_in.c: cope with SYN packets received during established states,
    and retransmission of initial SYN.

  * tcp_out.c: set push bit correctly when tcp segments are merged

  2009-03-27 Kieran Mansley
  * tcp_out.c set window correctly on probes (correcting change made
    yesterday)