lib/drivers/lwip/CHANGELOG

   1 FUTURE
   2
   3   * TODO: The lwIP source code makes some invalid assumptions on processor
   4     word-length, storage sizes and alignment. See the mailing lists for
   5     problems with exoteric (/DSP) architectures showing these problems.
   6     We still have to fix some of these issues neatly.
   7
   8 HISTORY
   9
  10 (CVS HEAD)
  11
  12   * [Enter new changes just after this line - do not remove this line]
  13
  14   ++ New features:
  15
  16   2010-07-12: Simon Goldschmidt (patch by Stephane Lesage)
  17   * ip.c, udp.c/.h, pbuf.h, sockets.c: task #10495: Added support for
  18     IP_MULTICAST_LOOP at socket- and raw-API level.
  19
  20   2010-06-16: Simon Goldschmidt
  21   * ip.c: Added an optional define (LWIP_IP_ACCEPT_UDP_PORT) that can allow
  22     link-layer-addressed UDP traffic to be received while a netif is down (just
  23     like DHCP during configuration)
  24
  25   2010-05-22: Simon Goldschmidt
  26   * many many files: bug #27352: removed packing from ip_addr_t, the packed
  27     version is now only used in protocol headers. Added global storage for
  28     current src/dest IP address while in input functions.
  29
  30   2010-05-16: Simon Goldschmidt
  31   * def.h: task #10391: Add preprocessor-macros for compile-time htonl
  32     calculation (and use them throughout the stack where applicable)
  33
  34   2010-05-16: Simon Goldschmidt
  35   * opt.h, memp_std.h, memp.c, ppp_oe.h/.c: PPPoE now uses its own MEMP pool
  36     instead of the heap (moved struct pppoe_softc from ppp_oe.c to ppp_oe.h)
  37
  38   2010-05-16: Simon Goldschmidt
  39   * opt.h, memp_std.h, dns.h/.c: DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses its own
  40     MEMP pool instead of the heap
  41
  42   2010-05-13: Simon Goldschmidt
  43   * tcp.c, udp.c: task #6995: Implement SO_REUSEADDR (correctly), added
  44     new option SO_REUSE_RXTOALL to pass received UDP broadcast/multicast
  45     packets to more than one pcb.
  46
  47   2010-05-02: Simon Goldschmidt
  48   * netbuf.h/.c, sockets.c, api_msg.c: use checksum-on-copy for sending
  49     UDP data for LWIP_NETIF_TX_SINGLE_PBUF==1
  50
  51   2010-04-30: Simon Goldschmidt
  52   * udp.h/.c, pbuf.h/.c: task #6849: added udp_send(_to/_if) functions that
  53     take a precalculated checksum, added pbuf_fill_chksum() to copy data
  54     into a pbuf and at the same time calculating the checksum for that data
  55
  56   2010-04-29: Simon Goldschmidt
  57   * ip_addr.h, etharp.h/.c, autoip.c: Create overridable macros for copying
  58     2-byte-aligned IP addresses and MAC addresses
  59
  60   2010-04-28: Patch by Bill Auerbach
  61   * ip.c: Inline generating IP checksum to save a function call
  62
  63   2010-04-14: Simon Goldschmidt
  64   * tcpip.h/.c, timers.c: Added an overridable define to get informed when the
  65     tcpip_thread processes messages or timeouts to implement a watchdog.
  66
  67   2010-03-28: Simon Goldschmidt
  68   * ip_frag.c: create a new (contiguous) PBUF_RAM for every outgoing
  69     fragment if LWIP_NETIF_TX_SINGLE_PBUF==1
  70
  71   2010-03-27: Simon Goldschmidt
  72   * etharp.c: Speedup TX by moving code from find_entry to etharp_output/
  73     etharp_query to prevent unnecessary function calls (inspired by
  74     patch #7135).
  75
  76   2010-03-20: Simon Goldschmidt
  77   * opt.h, tcpip.c/.h: Added an option to disable tcpip_(un)timeout code
  78     since the linker cannot do this automatically to save space.
  79
  80   2010-03-20: Simon Goldschmidt
  81   * opt.h, etharp.c/.h: Added support for static ARP table entries
  82
  83   2010-03-14: Simon Goldschmidt
  84   * tcp_impl.h, tcp_out.c, inet_chksum.h/.c: task #6849: Calculate checksum
  85     when creating TCP segments, not when (re-)transmitting them.
  86
  87   2010-03-07: Simon Goldschmidt
  88   * sockets.c: bug #28775 (select/event_callback: only check select_cb_list
  89     on change) plus use SYS_LIGHTWEIGHT_PROT to protect the select code.
  90     This should speed up receiving data on sockets as the select code in
  91     event_callback is only executed when select is waiting.
  92
  93   2010-03-06: Simon Goldschmidt
  94   * tcp_out.c: task #7013 (Create option to have all packets delivered to
  95     netif->output in one piece): Always copy to try to create single pbufs
  96     in tcp_write.
  97
  98   2010-03-06: Simon Goldschmidt
  99   * api.h, api_lib.c, sockets.c: task #10167 (sockets: speed up TCP recv
 100     by not allocating a netbuf): added function netconn_recv_tcp_pbuf()
 101     for tcp netconns to receive pbufs, not netbufs; use that function
 102     for tcp sockets.
 103
 104   2010-03-05: Jakob Ole Stoklundsen / Simon Goldschmidt
 105   * opt.h, tcp.h, tcp_impl.h, tcp.c, tcp_in.c, tcp_out.c: task #7040:
 106     Work on tcp_enqueue: Don't waste memory when chaining segments,
 107     added option TCP_OVERSIZE to prevent creating many small pbufs when
 108     calling tcp_write with many small blocks of data. Instead, pbufs are
 109     allocated larger than needed and the space is used for later calls to
 110     tcp_write.
 111
 112   2010-02-21: Simon Goldschmidt
 113   * stats.c/.h: Added const char* name to mem- and memp-stats for easier
 114     debugging.
 115
 116   2010-02-21: Simon Goldschmidt
 117   * tcp.h (and usages), added tcp_impl.h: Splitted API and internal
 118     implementation of tcp to make API usage cleare to application programmers
 119
 120   2010-02-14: Simon Goldschmidt/Stephane Lesage
 121   * ip_addr.h: Improved some defines working on ip addresses, added faster
 122     macro to copy addresses that cannot be NULL
 123
 124   2010-02-13: Simon Goldschmidt
 125   * api.h, api_lib.c, api_msg.c, sockets.c: task #7865 (implement non-
 126     blocking send operation)
 127
 128   2010-02-12: Simon Goldschmidt
 129   * sockets.c/.h: Added a minimal version of posix fctl() to have a
 130     standardised way to set O_NONBLOCK for nonblocking sockets.
 131
 132   2010-02-12: Simon Goldschmidt
 133   * dhcp.c/.h, autoip.c/.h: task #10139 (Prefer statically allocated
 134     memory): added autoip_set_struct() and dhcp_set_struct() to let autoip
 135     and dhcp work with user-allocated structs instead of callin mem_malloc
 136
 137   2010-02-12: Simon Goldschmidt/Jeff Barber
 138   * tcp.c/h: patch #6865 (SO_REUSEADDR for TCP): if pcb.so_options has
 139     SOF_REUSEADDR set, allow binding to endpoint in TIME_WAIT
 140
 141   2010-02-12: Simon Goldschmidt
 142   * sys layer: task #10139 (Prefer statically allocated memory): converted
 143     mbox and semaphore functions to take pointers to sys_mbox_t/sys_sem_t;
 144     converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
 145     task #7212: Add Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX
 146     to let sys.h use binary semaphores instead of mutexes - as before)
 147
 148   2010-02-09: Simon Goldschmidt (Simon Kallweit)
 149   * timers.c/.h: Added function sys_restart_timeouts() from patch #7085
 150     (Restart system timeout handling)
 151
 152   2010-02-09: Simon Goldschmidt
 153   * netif.c/.h, removed loopif.c/.h: task #10153 (Integrate loopif into
 154     netif.c) - loopif does not have to be created by the port any more,
 155     just define LWIP_HAVE_LOOPIF to 1.
 156
 157   2010-02-08: Simon Goldschmidt
 158   * inet.h, ip_addr.c/.h: Added reentrant versions of inet_ntoa/ipaddr_ntoa
 159     inet_ntoa_r/ipaddr_ntoa_r
 160
 161   2010-02-08: Simon Goldschmidt
 162   * netif.h: Added netif_s/get_igmp_mac_filter() macros
 163
 164   2010-02-05: Simon Goldschmidt
 165   * netif.h: Added function-like macros to get/set the hostname on a netif
 166
 167   2010-02-04: Simon Goldschmidt
 168   * nearly every file: Replaced struct ip_addr by typedef ip_addr_t to
 169     make changing the actual implementation behind the typedef easier.
 170
 171   2010-02-01: Simon Goldschmidt
 172   * opt.h, memp_std.h, dns.h, netdb.c, memp.c: Let netdb use a memp pool
 173     for allocating memory when getaddrinfo() is called.
 174
 175   2010-01-31: Simon Goldschmidt
 176   * dhcp.h, dhcp.c: Reworked the code that parses DHCP options: parse
 177     them once instead of parsing for every option. This also removes
 178     the need for mem_malloc from dhcp_recv and makes it possible to
 179     correctly retrieve the BOOTP file.
 180
 181   2010-01-30: simon Goldschmidt
 182   * sockets.c: Use SYS_LIGHTWEIGHT_PROT instead of a semaphore to protect
 183     the sockets array.
 184
 185   2010-01-29: Simon Goldschmidt (patch by Laura Garrett)
 186   * api.h, api_msg.c, sockets.c: Added except set support in select
 187     (patch #6860)
 188
 189   2010-01-29: Simon Goldschmidt (patch by Laura Garrett)
 190   * api.h, sockets.h, err.h, api_lib.c, api_msg.c, sockets.c, err.c:
 191     Add non-blocking support for connect (partly from patch #6860),
 192     plus many cleanups in socket & netconn API.
 193
 194   2010-01-27: Simon Goldschmidt
 195   * opt.h, tcp.h, init.c, api_msg.c: Added TCP_SNDQUEUELOWAT corresponding
 196     to TCP_SNDLOWAT and added tcp_sndqueuelen() - this fixes bug #28605
 197
 198   2010-01-26: Simon Goldschmidt
 199   * snmp: Use memp pools for snmp instead of the heap; added 4 new pools.
 200
 201   2010-01-14: Simon Goldschmidt
 202   * ppp.c/.h: Fixed bug #27856: PPP: Set netif link- and status-callback
 203     by adding ppp_set_netif_statuscallback()/ppp_set_netif_linkcallback()
 204
 205   2010-01-13: Simon Goldschmidt
 206   * mem.c: The heap now may be moved to user-defined memory by defining
 207     LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
 208     (patch #6966 and bug #26133)
 209
 210   2010-01-10: Simon Goldschmidt (Bill Auerbach)
 211   * opt.h, memp.c: patch #6822 (Add option to place memory pools in
 212     separate arrays)
 213
 214   2010-01-10: Simon Goldschmidt
 215   * init.c, igmp.c: patch #6463 (IGMP - Adding Random Delay): added define
 216     LWIP_RAND() for lwip-wide randomization (to be defined in cc.h)
 217
 218   2009-12-31: Simon Goldschmidt
 219   * tcpip.c, init.c, memp.c, sys.c, memp_std.h, sys.h, tcpip.h
 220     added timers.c/.h: Separated timer implementation from semaphore/mbox
 221     implementation, moved timer implementation to timers.c/.h, timers are
 222     now only called from tcpip_thread or by explicitly checking them.
 223     (TASK#7235)
 224
 225   2009-12-27: Simon Goldschmidt
 226   * opt.h, etharp.h/.c, init.c, tcpip.c: Added an additional option
 227     LWIP_ETHERNET to support ethernet without ARP (necessary for pure PPPoE)
 228
 229
 230   ++ Bugfixes:
 231
 232   2010-07-16: Kieran Mansley
 233   * msg_in.c: Fixed SNMP ASN constant defines to not use ! operator
 234
 235   2010-07-10: Simon Goldschmidt
 236   * ip.c: Fixed bug #30402: CHECKSUM_GEN_IP_INLINE does not add IP options
 237
 238   2010-06-30: Simon Goldschmidt
 239   * api_msg.c: fixed bug #30300 (shutdown parameter was not initialized in
 240     netconn_delete)
 241
 242   2010-06-28: Kieran Mansley
 243   * timers.c remove unportable printing of C function pointers
 244
 245   2010-06-24: Simon Goldschmidt
 246   * init.c, timers.c/.h, opt.h, memp_std.h: From patch #7221: added flag
 247     NO_SYS_NO_TIMERS to drop timer support for NO_SYS==1 for easier upgrading
 248
 249   2010-06-24: Simon Goldschmidt
 250   * api(_lib).c/.h, api_msg.c/.h, sockets.c/.h: Fixed bug #10088: Correctly
 251     implemented shutdown at socket level.
 252
 253   2010-06-21: Simon Goldschmidt
 254   * pbuf.c/.h, ip_frag.c/.h, opt.h, memp_std.h: Fixed bug #29361 (ip_frag has
 255     problems with zero-copy DMA MACs) by adding custom pbufs and implementing
 256     custom pbufs that reference other (original) pbufs. Additionally set
 257     IP_FRAG_USES_STATIC_BUF=0 as default to be on the safe side.
 258
 259   2010-06-15: Simon Goldschmidt
 260   * dhcp.c: Fixed bug #29970: DHCP endian issue parsing option responses
 261
 262   2010-06-14: Simon Goldschmidt
 263   * autoip.c: Fixed bug #30039: AutoIP does not reuse previous addresses
 264
 265   2010-06-12: Simon Goldschmidt
 266   * dhcp.c: Fixed bug #30038: dhcp_network_changed doesn't reset AUTOIP coop
 267     state
 268
 269   2010-05-17: Simon Goldschmidt
 270   * netdb.c: Correctly NULL-terminate h_addr_list
 271
 272   2010-05-16: Simon Goldschmidt
 273   * def.h/.c: changed the semantics of LWIP_PREFIX_BYTEORDER_FUNCS to prevent
 274     "symbol already defined" i.e. when linking to winsock
 275
 276   2010-05-05: Simon Goldschmidt
 277   * def.h, timers.c: Fixed bug #29769 (sys_check_timeouts: sys_now() may
 278     overflow)
 279
 280   2010-04-21: Simon Goldschmidt
 281   * api_msg.c: Fixed bug #29617 (sometime cause stall on delete listening
 282     connection)
 283
 284   2010-03-28: Luca Ceresoli
 285   * ip_addr.c/.h: patch #7143: Add a few missing const qualifiers
 286
 287   2010-03-27: Luca Ceresoli
 288   * mib2.c: patch #7130: remove meaningless const qualifiers
 289
 290   2010-03-26: Simon Goldschmidt
 291   * tcp_out.c: Make LWIP_NETIF_TX_SINGLE_PBUF work for TCP, too
 292
 293   2010-03-26: Simon Goldschmidt
 294   * various files: Fixed compiling with different options disabled (TCP/UDP),
 295     triggered by bug #29345; don't allocate acceptmbox if LWIP_TCP is disabled
 296
 297   2010-03-25: Simon Goldschmidt
 298   * sockets.c: Fixed bug #29332: lwip_select() processes readset incorrectly
 299
 300   2010-03-25: Simon Goldschmidt
 301   * tcp_in.c, test_tcp_oos.c: Fixed bug #29080: Correctly handle remote side
 302     overrunning our rcv_wnd in ooseq case.
 303
 304   2010-03-22: Simon Goldschmidt
 305   * tcp.c: tcp_listen() did not copy the pcb's prio.
 306
 307   2010-03-19: Simon Goldschmidt
 308   * snmp_msg.c: Fixed bug #29256: SNMP Trap address was not correctly set
 309
 310   2010-03-14: Simon Goldschmidt
 311   * opt.h, etharp.h: Fixed bug #29148 (Incorrect PBUF_POOL_BUFSIZE for ports
 312     where ETH_PAD_SIZE > 0) by moving definition of ETH_PAD_SIZE to opt.h
 313     and basing PBUF_LINK_HLEN on it.
 314
 315   2010-03-08: Simon Goldschmidt
 316   * netif.c, ipv4/ip.c: task #10241 (AutoIP: don't break existing connections
 317     when assiging routable address): when checking incoming packets and
 318     aborting existing connection on address change, filter out link-local
 319     addresses.
 320
 321   2010-03-06: Simon Goldschmidt
 322   * sockets.c: Fixed LWIP_NETIF_TX_SINGLE_PBUF for LWIP_TCPIP_CORE_LOCKING
 323
 324   2010-03-06: Simon Goldschmidt
 325   * ipv4/ip.c: Don't try to forward link-local addresses
 326
 327   2010-03-06: Simon Goldschmidt
 328   * etharp.c: Fixed bug #29087: etharp: don't send packets for LinkLocal-
 329     addresses to gw
 330
 331   2010-03-05: Simon Goldschmidt
 332   * dhcp.c: Fixed bug #29072: Correctly set ciaddr based on message-type
 333     and state.
 334
 335   2010-03-05: Simon Goldschmidt
 336   * api_msg.c: Correctly set TCP_WRITE_FLAG_MORE when netconn_write is split
 337     into multiple calls to tcp_write.
 338
 339   2010-02-21: Simon Goldschmidt
 340   * opt.h, mem.h, dns.c: task #10140: Remove DNS_USES_STATIC_BUF (keep
 341     the implementation of DNS_USES_STATIC_BUF==1)
 342
 343   2010-02-20: Simon Goldschmidt
 344   * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Task #10088: Correctly implement
 345     close() vs. shutdown(). Now the application does not get any more
 346     recv callbacks after calling tcp_close(). Added tcp_shutdown().
 347
 348   2010-02-19: Simon Goldschmidt
 349   * mem.c/.h, pbuf.c: Renamed mem_realloc() to mem_trim() to prevent
 350     confusion with realloc()
 351
 352   2010-02-15: Simon Goldschmidt/Stephane Lesage
 353   * netif.c/.h: Link status does not depend on LWIP_NETIF_LINK_CALLBACK
 354     (fixes bug #28899)
 355
 356   2010-02-14: Simon Goldschmidt
 357   * netif.c: Fixed bug #28877 (Duplicate ARP gratuitous packet with
 358     LWIP_NETIF_LINK_CALLBACK set on) by only sending if both link- and
 359     admin-status of a netif are up
 360
 361   2010-02-14: Simon Goldschmidt
 362   * opt.h: Disable ETHARP_TRUST_IP_MAC by default since it slows down packet
 363     reception and is not really necessary
 364
 365   2010-02-14: Simon Goldschmidt
 366   * etharp.c/.h: Fixed ARP input processing: only add a new entry if a
 367     request was directed as us (RFC 826, Packet Reception), otherwise
 368     only update existing entries; internalized some functions
 369
 370   2010-02-14: Simon Goldschmidt
 371   * netif.h, etharp.c, tcpip.c: Fixed bug #28183 (ARP and TCP/IP cannot be
 372     disabled on netif used for PPPoE) by adding a new netif flag
 373     (NETIF_FLAG_ETHERNET) that tells the stack the device is an ethernet
 374     device but prevents usage of ARP (so that ethernet_input can be used
 375     for PPPoE).
 376
 377   2010-02-12: Simon Goldschmidt
 378   * netif.c: netif_set_link_up/down: only do something if the link state
 379     actually changes
 380
 381   2010-02-12: Simon Goldschmidt/Stephane Lesage
 382   * api_msg.c: Fixed bug #28865 (Cannot close socket/netconn in non-blocking
 383     connect)
 384
 385   2010-02-12: Simon Goldschmidt
 386   * mem.h: Fixed bug #28866 (mem_realloc function defined in mem.h)
 387
 388   2010-02-09: Simon Goldschmidt
 389   * api_lib.c, api_msg.c, sockets.c, api.h, api_msg.h: Fixed bug #22110
 390    (recv() makes receive window update for data that wasn't received by
 391     application)
 392
 393   2010-02-09: Simon Goldschmidt/Stephane Lesage
 394   * sockets.c: Fixed bug #28853 (lwip_recvfrom() returns 0 on receive time-out
 395     or any netconn_recv() error)
 396
 397   2010-02-09: Simon Goldschmidt
 398   * ppp.c: task #10154 (PPP: Update snmp in/out counters for tx/rx packets)
 399
 400   2010-02-09: Simon Goldschmidt
 401   * netif.c: For loopback packets, adjust the stats- and snmp-counters
 402     for the loopback netif.
 403
 404   2010-02-08: Simon Goldschmidt
 405   * igmp.c/.h, ip.h: Moved most defines from igmp.h to igmp.c for clarity
 406     since they are not used anywhere else.
 407
 408   2010-02-08: Simon Goldschmidt (Stéphane Lesage)
 409   * igmp.c, igmp.h, stats.c, stats.h: Improved IGMP stats
 410     (patch from bug #28798)
 411
 412   2010-02-08: Simon Goldschmidt (Stéphane Lesage)
 413   * igmp.c: Fixed bug #28798 (Error in "Max Response Time" processing) and
 414     another bug when LWIP_RAND() returns zero.
 415
 416   2010-02-04: Simon Goldschmidt
 417   * nearly every file: Use macros defined in ip_addr.h (some of them new)
 418     to work with IP addresses (preparation for bug #27352 - Change ip_addr
 419     from struct to typedef (u32_t) - and better code).
 420
 421   2010-01-31: Simon Goldschmidt
 422   * netif.c: Don't call the link-callback from netif_set_up/down() since
 423     this invalidly retriggers DHCP.
 424
 425   2010-01-29: Simon Goldschmidt
 426   * ip_addr.h, inet.h, def.h, inet.c, def.c, more: Cleanly separate the
 427     portability file inet.h and its contents from the stack: moved htonX-
 428     functions to def.h (and the new def.c - they are not ipv4 dependent),
 429     let inet.h depend on ip_addr.h and not the other way round.
 430     This fixes bug #28732.
 431
 432   2010-01-28: Kieran Mansley
 433   * tcp.c: Ensure ssthresh >= 2*MSS
 434
 435   2010-01-27: Simon Goldschmidt
 436   * tcp.h, tcp.c, tcp_in.c: Fixed bug #27871: Calling tcp_abort() in recv
 437     callback can lead to accessing unallocated memory. As a consequence,
 438     ERR_ABRT means the application has called tcp_abort()!
 439
 440   2010-01-25: Simon Goldschmidt
 441   * snmp_structs.h, msg_in.c: Partly fixed bug #22070 (MIB_OBJECT_WRITE_ONLY
 442     not implemented in SNMP): write-only or not-accessible are still
 443     returned by getnext (though not by get)
 444
 445   2010-01-24: Simon Goldschmidt
 446   * snmp: Renamed the private mib node from 'private' to 'mib_private' to
 447     not use reserved C/C++ keywords
 448
 449   2010-01-23: Simon Goldschmidt
 450   * sockets.c: Fixed bug #28716: select() returns 0 after waiting for less
 451     than 1 ms
 452
 453   2010-01-21: Simon Goldschmidt
 454   * tcp.c, api_msg.c: Fixed bug #28651 (tcp_connect: no callbacks called
 455     if tcp_enqueue fails) both in raw- and netconn-API
 456
 457   2010-01-19: Simon Goldschmidt
 458   * api_msg.c: Fixed bug #27316: netconn: Possible deadlock in err_tcp
 459
 460   2010-01-18: Iordan Neshev/Simon Goldschmidt
 461   * src/netif/ppp: reorganised PPP sourcecode to 2.3.11 including some
 462     bugfix backports from 2.4.x.
 463
 464   2010-01-18: Simon Goldschmidt
 465   * mem.c: Fixed bug #28679: mem_realloc calculates mem_stats wrong
 466
 467   2010-01-17: Simon Goldschmidt
 468   * api_lib.c, api_msg.c, (api_msg.h, api.h, sockets.c, tcpip.c):
 469     task #10102: "netconn: clean up conn->err threading issues" by adding
 470     error return value to struct api_msg_msg
 471
 472   2010-01-17: Simon Goldschmidt
 473   * api.h, api_lib.c, sockets.c: Changed netconn_recv() and netconn_accept()
 474     to return err_t (bugs #27709 and #28087)
 475
 476   2010-01-14: Simon Goldschmidt
 477   * ...: Use typedef for function prototypes throughout the stack.
 478
 479   2010-01-13: Simon Goldschmidt
 480   * api_msg.h/.c, api_lib.c: Fixed bug #26672 (close connection when receive
 481     window = 0) by correctly draining recvmbox/acceptmbox
 482
 483   2010-01-11: Simon Goldschmidt
 484   * pap.c: Fixed bug #13315 (PPP PAP authentication can result in
 485     erroneous callbacks) by copying the code from recent pppd
 486
 487   2010-01-10: Simon Goldschmidt
 488   * raw.c: Fixed bug #28506 (raw_bind should filter received packets)
 489
 490   2010-01-10: Simon Goldschmidt
 491   * tcp.h/.c: bug #28127 (remove call to tcp_output() from tcp_ack(_now)())
 492
 493   2010-01-08: Simon Goldschmidt
 494   * sockets.c: Fixed bug #28519 (lwip_recvfrom bug with len > 65535)
 495
 496   2010-01-08: Simon Goldschmidt
 497   * dns.c: Copy hostname for DNS_LOCAL_HOSTLIST_IS_DYNAMIC==1 since string
 498     passed to dns_local_addhost() might be volatile
 499
 500   2010-01-07: Simon Goldschmidt
 501   * timers.c, tcp.h: Call tcp_timer_needed() with NO_SYS==1, too
 502
 503   2010-01-06: Simon Goldschmidt
 504   * netdb.h: Fixed bug #28496: missing include guards in netdb.h
 505
 506   2009-12-31: Simon Goldschmidt
 507   * many ppp files: Reorganised PPP source code from ucip structure to pppd
 508     structure to easily compare our code against the pppd code (around v2.3.1)
 509
 510   2009-12-27: Simon Goldschmidt
 511   * tcp_in.c: Another fix for bug #28241 (ooseq processing) and adapted
 512     unit test
 513
 514
 515 (STABLE-1.3.2)
 516
 517   ++ New features:
 518
 519   2009-10-27 Simon Goldschmidt/Stephan Lesage
 520   * netifapi.c/.h: Added netifapi_netif_set_addr()
 521
 522   2009-10-07 Simon Goldschmidt/Fabian Koch
 523   * api_msg.c, netbuf.c/.h, opt.h: patch #6888: Patch for UDP Netbufs to
 524     support dest-addr and dest-port (optional: LWIP_NETBUF_RECVINFO)
 525
 526   2009-08-26 Simon Goldschmidt/Simon Kallweit
 527   * slipif.c/.h: bug #26397: SLIP polling support
 528
 529   2009-08-25 Simon Goldschmidt
 530   * opt.h, etharp.h/.c: task #9033: Support IEEE 802.1q tagged frame (VLAN),
 531     New configuration options ETHARP_SUPPORT_VLAN and ETHARP_VLAN_CHECK.
 532
 533   2009-08-25 Simon Goldschmidt
 534   * ip_addr.h, netdb.c: patch #6900: added define ip_ntoa(struct ip_addr*)
 535
 536   2009-08-24 Jakob Stoklund Olesen
 537   * autoip.c, dhcp.c, netif.c: patch #6725: Teach AutoIP and DHCP to respond
 538     to netif_set_link_up().
 539
 540   2009-08-23 Simon Goldschmidt
 541   * tcp.h/.c: Added function tcp_debug_state_str() to convert a tcp state
 542     to a human-readable string.
 543
 544   ++ Bugfixes:
 545
 546   2009-12-24: Kieran Mansley
 547   * tcp_in.c Apply patches from Oleg Tyshev to improve OOS processing
 548     (BUG#28241)
 549
 550   2009-12-06: Simon Goldschmidt
 551   * ppp.h/.c: Fixed bug #27079 (Yet another leak in PPP): outpacket_buf can
 552     be statically allocated (like in ucip)
 553
 554   2009-12-04: Simon Goldschmidt (patch by Ioardan Neshev)
 555   * pap.c: patch #6969: PPP: missing PAP authentication UNTIMEOUT
 556
 557   2009-12-03: Simon Goldschmidt
 558   * tcp.h, tcp_in.c, tcp_out.c: Fixed bug #28106: dup ack for fast retransmit
 559     could have non-zero length
 560
 561   2009-12-02: Simon Goldschmidt
 562   * tcp_in.c: Fixed bug #27904: TCP sends too many ACKs: delay resetting
 563     tcp_input_pcb until after calling the pcb's callbacks
 564
 565   2009-11-29: Simon Goldschmidt
 566   * tcp_in.c: Fixed bug #28054: Two segments with FIN flag on the out-of-
 567     sequence queue, also fixed PBUF_POOL leak in the out-of-sequence code
 568
 569   2009-11-29: Simon Goldschmidt
 570   * pbuf.c: Fixed bug #28064: pbuf_alloc(PBUF_POOL) is not thread-safe by
 571     queueing a call into tcpip_thread to free ooseq-bufs if the pool is empty
 572
 573   2009-11-26: Simon Goldschmidt
 574   * tcp.h: Fixed bug #28098: Nagle can prevent fast retransmit from sending
 575     segment
 576
 577   2009-11-26: Simon Goldschmidt
 578   * tcp.h, sockets.c: Fixed bug #28099: API required to disable Nagle
 579     algorithm at PCB level
 580
 581   2009-11-22: Simon Goldschmidt
 582   * tcp_out.c: Fixed bug #27905: FIN isn't combined with data on unsent
 583
 584   2009-11-22: Simon Goldschmidt (suggested by Bill Auerbach)
 585   * tcp.c: tcp_alloc: prevent increasing stats.err for MEMP_TCP_PCB when
 586     reusing time-wait pcb
 587
 588   2009-11-20: Simon Goldschmidt (patch by Albert Bartel)
 589   * sockets.c: Fixed bug #28062: Data received directly after accepting
 590     does not wake up select
 591
 592   2009-11-11: Simon Goldschmidt
 593   * netdb.h: Fixed bug #27994: incorrect define for freeaddrinfo(addrinfo)
 594
 595   2009-10-30: Simon Goldschmidt
 596   * opt.h: Increased default value for TCP_MSS to 536, updated default
 597     value for TCP_WND to 4*TCP_MSS to keep delayed ACK working.
 598
 599   2009-10-28: Kieran Mansley
 600   * tcp_in.c, tcp_out.c, tcp.h: re-work the fast retransmission code
 601     to follow algorithm from TCP/IP Illustrated
 602
 603   2009-10-27: Kieran Mansley
 604   * tcp_in.c: fix BUG#27445: grow cwnd with every duplicate ACK
 605
 606   2009-10-25: Simon Goldschmidt
 607   * tcp.h: bug-fix in the TCP_EVENT_RECV macro (has to call tcp_recved if
 608     pcb->recv is NULL to keep rcv_wnd correct)
 609
 610   2009-10-25: Simon Goldschmidt
 611   * tcp_in.c: Fixed bug #26251: RST process in TIME_WAIT TCP state
 612
 613   2009-10-23: Simon Goldschmidt (David Empson)
 614   * tcp.c: Fixed bug #27783: Silly window avoidance for small window sizes
 615
 616   2009-10-21: Simon Goldschmidt
 617   * tcp_in.c: Fixed bug #27215: TCP sent() callback gives leading and
 618     trailing 1 byte len (SYN/FIN)
 619
 620   2009-10-21: Simon Goldschmidt
 621   * tcp_out.c: Fixed bug #27315: zero window probe and FIN
 622
 623   2009-10-19: Simon Goldschmidt
 624   * dhcp.c/.h: Minor code simplification (don't store received pbuf, change
 625     conditional code to assert where applicable), check pbuf length before
 626     testing for valid reply
 627
 628   2009-10-19: Simon Goldschmidt
 629   * dhcp.c: Removed most calls to udp_connect since they aren't necessary
 630     when using udp_sendto_if() - always stay connected to IP_ADDR_ANY.
 631
 632   2009-10-16: Simon Goldschmidt
 633   * ip.c: Fixed bug #27390: Source IP check in ip_input() causes it to drop
 634     valid DHCP packets -> allow 0.0.0.0 as source address when LWIP_DHCP is
 635     enabled
 636
 637   2009-10-15: Simon Goldschmidt (Oleg Tyshev)
 638   * tcp_in.c: Fixed bug #27329: dupacks by unidirectional data transmit
 639
 640   2009-10-15: Simon Goldschmidt
 641   * api_lib.c: Fixed bug #27709: conn->err race condition on netconn_recv()
 642     timeout
 643
 644   2009-10-15: Simon Goldschmidt
 645   * autoip.c: Fixed bug #27704: autoip starts with wrong address
 646     LWIP_AUTOIP_CREATE_SEED_ADDR() returned address in host byte order instead
 647     of network byte order
 648
 649   2009-10-11 Simon Goldschmidt (Jörg Kesten)
 650   * tcp_out.c: Fixed bug #27504: tcp_enqueue wrongly concatenates segments
 651     which are not consecutive when retransmitting unacked segments
 652
 653   2009-10-09 Simon Goldschmidt
 654   * opt.h: Fixed default values of some stats to only be enabled if used
 655     Fixes bug #27338: sys_stats is defined when NO_SYS = 1
 656
 657   2009-08-30 Simon Goldschmidt
 658   * ip.c: Fixed bug bug #27345: "ip_frag() does not use the LWIP_NETIF_LOOPBACK
 659     function" by checking for loopback before calling ip_frag
 660
 661   2009-08-25 Simon Goldschmidt
 662   * dhcp.c: fixed invalid dependency to etharp_query if DHCP_DOES_ARP_CHECK==0
 663
 664   2009-08-23 Simon Goldschmidt
 665   * ppp.c: bug #27078: Possible memory leak in pppInit()
 666
 667   2009-08-23 Simon Goldschmidt
 668   * netdb.c, dns.c: bug #26657: DNS, if host name is "localhost", result
 669     is error.
 670
 671   2009-08-23 Simon Goldschmidt
 672   * opt.h, init.c: bug #26649: TCP fails when TCP_MSS > TCP_SND_BUF
 673     Fixed wrong parenthesis, added check in init.c
 674
 675   2009-08-23 Simon Goldschmidt
 676   * ppp.c: bug #27266: wait-state debug message in pppMain occurs every ms
 677
 678   2009-08-23 Simon Goldschmidt
 679   * many ppp files: bug #27267: Added include to string.h where needed
 680
 681   2009-08-23 Simon Goldschmidt
 682   * tcp.h: patch #6843: tcp.h macro optimization patch (for little endian)
 683
 684
 685 (STABLE-1.3.1)
 686
 687   ++ New features:
 688
 689   2009-05-10 Simon Goldschmidt
 690   * opt.h, sockets.c, pbuf.c, netbuf.h, pbuf.h: task #7013: Added option
 691     LWIP_NETIF_TX_SINGLE_PBUF to try to create transmit packets from only
 692     one pbuf to help MACs that don't support scatter-gather DMA.
 693
 694   2009-05-09 Simon Goldschmidt
 695   * icmp.h, icmp.c: Shrinked ICMP code, added option to NOT check icoming
 696     ECHO pbuf for size (just use it): LWIP_ICMP_ECHO_CHECK_INPUT_PBUF_LEN
 697
 698   2009-05-05 Simon Goldschmidt, Jakob Stoklund Olesen
 699   * ip.h, ip.c: Added ip_current_netif() & ip_current_header() to receive
 700     extended info about the currently received packet.
 701
 702   2009-04-27 Simon Goldschmidt
 703   * sys.h: Made SYS_LIGHTWEIGHT_PROT and sys_now() work with NO_SYS=1
 704
 705   2009-04-25 Simon Goldschmidt
 706   * mem.c, opt.h: Added option MEM_USE_POOLS_TRY_BIGGER_POOL to try the next
 707     bigger malloc pool if one is empty (only usable with MEM_USE_POOLS).
 708
 709   2009-04-21 Simon Goldschmidt
 710   * dns.c, init.c, dns.h, opt.h: task #7507, patch #6786: DNS supports static
 711     hosts table. New configuration options DNS_LOCAL_HOSTLIST and
 712     DNS_LOCAL_HOSTLIST_IS_DYNAMIC. Also, DNS_LOOKUP_LOCAL_EXTERN() can be defined
 713     as an external function for lookup.
 714
 715   2009-04-15 Simon Goldschmidt
 716   * dhcp.c: patch #6763: Global DHCP XID can be redefined to something more unique
 717
 718   2009-03-31 Kieran Mansley
 719   * tcp.c, tcp_out.c, tcp_in.c, sys.h, tcp.h, opts.h: add support for
 720     TCP timestamp options, off by default.  Rework tcp_enqueue() to
 721     take option flags rather than specified option data
 722
 723   2009-02-18 Simon Goldschmidt
 724   * cc.h: Added printf formatter for size_t: SZT_F
 725
 726   2009-02-16 Simon Goldschmidt (patch by Rishi Khan)
 727   * icmp.c, opt.h: patch #6539: (configurable) response to broadcast- and multicast
 728     pings
 729
 730   2009-02-12 Simon Goldschmidt
 731   * init.h: Added LWIP_VERSION to get the current version of the stack
 732
 733   2009-02-11 Simon Goldschmidt (suggested by Gottfried Spitaler)
 734   * opt.h, memp.h/.c: added MEMP_MEM_MALLOC to use mem_malloc/mem_free instead
 735     of the pool allocator (can save code size with MEM_LIBC_MALLOC if libc-malloc
 736     is otherwise used)
 737
 738   2009-01-28 Jonathan Larmour (suggested by Bill Bauerbach)
 739   * ipv4/inet_chksum.c, ipv4/lwip/inet_chksum.h: inet_chksum_pseudo_partial()
 740   is only used by UDPLITE at present, so conditionalise it.
 741
 742   2008-12-03 Simon Goldschmidt (base on patch from Luca Ceresoli)
 743   * autoip.c: checked in (slightly modified) patch #6683: Customizable AUTOIP
 744     "seed" address. This should reduce AUTOIP conflicts if
 745     LWIP_AUTOIP_CREATE_SEED_ADDR is overridden.
 746
 747   2008-10-02 Jonathan Larmour and Rishi Khan
 748   * sockets.c (lwip_accept): Return EWOULDBLOCK if would block on non-blocking
 749     socket.
 750
 751   2008-06-30 Simon Goldschmidt
 752   * mem.c, opt.h, stats.h: fixed bug #21433: Calling mem_free/pbuf_free from
 753     interrupt context isn't safe: LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT allows
 754     mem_free to run between mem_malloc iterations. Added illegal counter for
 755     mem stats.
 756
 757   2008-06-27 Simon Goldschmidt
 758   * stats.h/.c, some other files: patch #6483: stats module improvement:
 759     Added defines to display each module's statistic individually, added stats
 760     defines for MEM, MEMP and SYS modules, removed (unused) rexmit counter.
 761
 762   2008-06-17 Simon Goldschmidt
 763   * err.h: patch #6459: Made err_t overridable to use a more efficient type
 764     (define LWIP_ERR_T in cc.h)
 765
 766   2008-06-17 Simon Goldschmidt
 767   * slipif.c: patch #6480: Added a configuration option for slipif for symmetry
 768     to loopif
 769
 770   2008-06-17 Simon Goldschmidt (patch by Luca Ceresoli)
 771   * netif.c, loopif.c, ip.c, netif.h, loopif.h, opt.h: Checked in slightly
 772     modified version of patch # 6370: Moved loopif code to netif.c so that
 773     loopback traffic is supported on all netifs (all local IPs).
 774     Added option to limit loopback packets for each netifs.
 775
 776
 777   ++ Bugfixes:
 778   2009-08-12 Kieran Mansley
 779   * tcp_in.c, tcp.c: Fix bug #27209: handle trimming of segments when
 780     out of window or out of order properly
 781
 782   2009-08-12 Kieran Mansley
 783   * tcp_in.c: Fix bug #27199: use snd_wl2 instead of snd_wl1
 784
 785   2009-07-28 Simon Goldschmidt
 786   * mem.h: Fixed bug #27105: "realloc() cannot replace mem_realloc()"s
 787
 788   2009-07-27 Kieran Mansley
 789   * api.h api_msg.h netdb.h sockets.h: add missing #include directives
 790
 791   2009-07-09 Kieran Mansley
 792   * api_msg.c, sockets.c, api.h: BUG23240 use signed counters for
 793     recv_avail and don't increment counters until message successfully
 794     sent to mbox
 795
 796   2009-06-25 Kieran Mansley
 797   * api_msg.c api.h: BUG26722: initialise netconn write variables
 798     in netconn_alloc
 799
 800   2009-06-25 Kieran Mansley
 801   * tcp.h: BUG26879: set ret value in TCP_EVENT macros when function is not set
 802
 803   2009-06-25 Kieran Mansley
 804   * tcp.c, tcp_in.c, tcp_out.c, tcp.h: BUG26301 and BUG26267: correct
 805     simultaneous close behaviour, and make snd_nxt have the same meaning
 806     as in the RFCs.
 807
 808   2009-05-12 Simon Goldschmidt
 809   * etharp.h, etharp.c, netif.c: fixed bug #26507: "Gratuitous ARP depends on
 810     arp_table / uses etharp_query" by adding etharp_gratuitous()
 811
 812   2009-05-12 Simon Goldschmidt
 813   * ip.h, ip.c, igmp.c: bug #26487: Added ip_output_if_opt that can add IP options
 814     to the IP header (used by igmp_ip_output_if)
 815
 816   2009-05-06 Simon Goldschmidt
 817   * inet_chksum.c: On little endian architectures, use LWIP_PLATFORM_HTONS (if
 818     defined) for SWAP_BYTES_IN_WORD to speed up checksumming.
 819
 820   2009-05-05 Simon Goldschmidt
 821   * sockets.c: bug #26405: Prematurely released semaphore causes lwip_select()
 822     to crash
 823
 824   2009-05-04 Simon Goldschmidt
 825   * init.c: snmp was not initialized in lwip_init()
 826
 827   2009-05-04 Frédéric Bernon
 828   * dhcp.c, netbios.c: Changes if IP_SOF_BROADCAST is enabled.
 829
 830   2009-05-03 Simon Goldschmidt
 831   * tcp.h: bug #26349: Nagle algorithm doesn't send although segment is full
 832     (and unsent->next == NULL)
 833
 834   2009-05-02 Simon Goldschmidt
 835   * tcpip.h, tcpip.c: fixed tcpip_untimeout (does not need the time, broken after
 836     1.3.0 in CVS only) - fixes compilation of ppp_oe.c
 837
 838   2009-05-02 Simon Goldschmidt
 839   * msg_in.c: fixed bug #25636: SNMPSET value is ignored for integer fields
 840
 841   2009-05-01 Simon Goldschmidt
 842   * pap.c: bug #21680: PPP upap_rauthnak() drops legal NAK packets
 843
 844   2009-05-01 Simon Goldschmidt
 845   * ppp.c: bug #24228: Memory corruption with PPP and DHCP
 846
 847   2009-04-29 Frédéric Bernon
 848   * raw.c, udp.c, init.c, opt.h, ip.h, sockets.h: bug #26309: Implement the
 849     SO(F)_BROADCAST filter for all API layers. Avoid the unindented reception
 850     of broadcast packets even when this option wasn't set. Port maintainers
 851     which want to enable this filter have to set IP_SOF_BROADCAST=1 in opt.h.
 852     If you want this option also filter broadcast on recv operations, you also
 853     have to set IP_SOF_BROADCAST_RECV=1 in opt.h.
 854
 855   2009-04-28 Simon Goldschmidt, Jakob Stoklund Olesen
 856   * dhcp.c: patch #6721, bugs #25575, #25576: Some small fixes to DHCP and
 857     DHCP/AUTOIP cooperation
 858
 859   2009-04-25 Simon Goldschmidt, Oleg Tyshev
 860   * tcp_out.c: bug #24212: Deadlocked tcp_retransmit due to exceeded pcb->cwnd
 861     Fixed by sorting the unsent and unacked queues (segments are inserted at the
 862     right place in tcp_output and tcp_rexmit).
 863
 864   2009-04-25 Simon Goldschmidt
 865   * memp.c, mem.c, memp.h, mem_std.h: bug #26213 "Problem with memory allocation
 866     when debugging": memp_sizes contained the wrong sizes (including sanity
 867     regions); memp pools for MEM_USE_POOLS were too small
 868
 869   2009-04-24 Simon Goldschmidt, Frédéric Bernon
 870   * inet.c: patch #6765: Fix a small problem with the last changes (incorrect
 871     behavior, with with ip address string not ended by a '\0', a space or a
 872     end of line)
 873
 874   2009-04-19 Simon Goldschmidt
 875   * rawapi.txt: Fixed bug #26069: Corrected documentation: if tcp_connect fails,
 876     pcb->err is called, not pcb->connected (with an error code).
 877
 878   2009-04-19 Simon Goldschmidt
 879   * tcp_out.c: Fixed bug #26236: "TCP options (timestamp) don't work with
 880     no-copy-tcpwrite": deallocate option data, only concat segments with same flags
 881
 882   2009-04-19 Simon Goldschmidt
 883   * tcp_out.c: Fixed bug #25094: "Zero-length pbuf" (options are now allocated
 884     in the header pbuf, not the data pbuf)
 885
 886   2009-04-18 Simon Goldschmidt
 887   * api_msg.c: fixed bug #25695: Segmentation fault in do_writemore()
 888
 889   2009-04-15 Simon Goldschmidt
 890   * sockets.c: tried to fix bug #23559: lwip_recvfrom problem with tcp
 891
 892   2009-04-15 Simon Goldschmidt
 893   * dhcp.c: task #9192: mem_free of dhcp->options_in and dhcp->msg_in
 894
 895   2009-04-15 Simon Goldschmidt
 896   * ip.c, ip6.c, tcp_out.c, ip.h: patch #6808: Add a utility function
 897     ip_hinted_output() (for smaller code mainly)
 898
 899   2009-04-15 Simon Goldschmidt
 900   * inet.c: patch #6765: Supporting new line characters in inet_aton()
 901
 902   2009-04-15 Simon Goldschmidt
 903   * dhcp.c: patch #6764: DHCP rebind and renew did not send hostnam option;
 904     Converted constant OPTION_MAX_MSG_SIZE to netif->mtu, check if netif->mtu
 905     is big enough in dhcp_start
 906
 907   2009-04-15 Simon Goldschmidt
 908   * netbuf.c: bug #26027: netbuf_chain resulted in pbuf memory leak
 909
 910   2009-04-15 Simon Goldschmidt
 911   * sockets.c, ppp.c: bug #25763: corrected 4 occurrences of SMEMCPY to MEMCPY
 912
 913   2009-04-15 Simon Goldschmidt
 914   * sockets.c: bug #26121: set_errno can be overridden
 915
 916   2009-04-09 Kieran Mansley (patch from Luca Ceresoli <lucaceresoli>)
 917   * init.c, opt.h: Patch#6774 TCP_QUEUE_OOSEQ breaks compilation when
 918     LWIP_TCP==0
 919
 920   2009-04-09 Kieran Mansley (patch from Roy Lee <roylee17>)
 921   * tcp.h: Patch#6802 Add do-while-clauses to those function like
 922     macros in tcp.h
 923
 924   2009-03-31 Kieran Mansley
 925   * tcp.c, tcp_in.c, tcp_out.c, tcp.h, opt.h: Rework the way window
 926     updates are calculated and sent (BUG20515)
 927
 928   * tcp_in.c: cope with SYN packets received during established states,
 929     and retransmission of initial SYN.
 930
 931   * tcp_out.c: set push bit correctly when tcp segments are merged
 932
 933   2009-03-27 Kieran Mansley
 934   * tcp_out.c set window correctly on probes (correcting change made
 935     yesterday)
 936
 937   2009-03-26 Kieran Mansley
 938   * tcp.c, tcp_in.c, tcp.h: add tcp_abandon() to cope with dropping
 939     connections where no reset required (bug #25622)
 940
 941   * tcp_out.c: set TCP_ACK flag on keepalive and zero window probes
 942     (bug #20779)
 943
 944   2009-02-18 Simon Goldschmidt (Jonathan Larmour and Bill Auerbach)
 945   * ip_frag.c: patch #6528: the buffer used for IP_FRAG_USES_STATIC_BUF could be
 946     too small depending on MEM_ALIGNMENT
 947
 948   2009-02-16 Simon Goldschmidt
 949   * sockets.h/.c, api_*.h/.c: fixed arguments of socket functions to match the standard;
 950     converted size argument of netconn_write to 'size_t'
 951
 952   2009-02-16 Simon Goldschmidt
 953   * tcp.h, tcp.c: fixed bug #24440: TCP connection close problem on 64-bit host
 954     by moving accept callback function pointer to TCP_PCB_COMMON
 955
 956   2009-02-12 Simon Goldschmidt
 957   * dhcp.c: fixed bug #25345 (DHCPDECLINE is sent with "Maximum message size"
 958     option)
 959
 960   2009-02-11 Simon Goldschmidt
 961   * dhcp.c: fixed bug #24480 (releasing old udp_pdb and pbuf in dhcp_start)
 962
 963   2009-02-11 Simon Goldschmidt
 964   * opt.h, api_msg.c: added configurable default valud for netconn->recv_bufsize:
 965     RECV_BUFSIZE_DEFAULT (fixes bug #23726: pbuf pool exhaustion on slow recv())
 966
 967   2009-02-10 Simon Goldschmidt
 968   * tcp.c: fixed bug #25467: Listen backlog is not reset on timeout in SYN_RCVD:
 969     Accepts_pending is decrease on a corresponding listen pcb when a connection
 970     in state SYN_RCVD is close.
 971
 972   2009-01-28 Jonathan Larmour
 973   * pbuf.c: reclaim pbufs from TCP out-of-sequence segments if we run
 974     out of pool pbufs.
 975
 976   2008-12-19 Simon Goldschmidt
 977   * many files: patch #6699: fixed some warnings on platform where sizeof(int) == 2
 978
 979   2008-12-10 Tamas Somogyi, Frédéric Bernon
 980   * sockets.c: fixed bug #25051: lwip_recvfrom problem with udp: fromaddr and
 981     port uses deleted netbuf.
 982
 983   2008-10-18 Simon Goldschmidt
 984   * tcp_in.c: fixed bug ##24596: Vulnerability on faulty TCP options length
 985     in tcp_parseopt
 986
 987   2008-10-15 Simon Goldschmidt
 988   * ip_frag.c: fixed bug #24517: IP reassembly crashes on unaligned IP headers
 989     by packing the struct ip_reass_helper.
 990
 991   2008-10-03 David Woodhouse, Jonathan Larmour
 992   * etharp.c (etharp_arp_input): Fix type aliasing problem copying ip address.
 993
 994   2008-10-02 Jonathan Larmour
 995   * dns.c: Hard-code structure sizes, to avoid issues on some compilers where
 996     padding is included.
 997
 998   2008-09-30 Jonathan Larmour
 999   * sockets.c (lwip_accept): check addr isn't NULL. If it's valid, do an
1000     assertion check that addrlen isn't NULL.
1001
1002   2008-09-30 Jonathan Larmour
1003   * tcp.c: Fix bug #24227, wrong error message in tcp_bind.
1004
1005   2008-08-26 Simon Goldschmidt
1006   * inet.h, ip_addr.h: fixed bug #24132: Cross-dependency between ip_addr.h and
1007     inet.h -> moved declaration of struct in_addr from ip_addr.h to inet.h
1008
1009   2008-08-14 Simon Goldschmidt
1010   * api_msg.c: fixed bug #23847: do_close_internal references freed memory (when
1011     tcp_close returns != ERR_OK)
1012
1013   2008-07-08 Frédéric Bernon
1014   * stats.h: Fix some build bugs introduced with patch #6483 (missing some parameters
1015     in macros, mainly if MEM_STATS=0 and MEMP_STATS=0).
1016
1017   2008-06-24 Jonathan Larmour
1018   * tcp_in.c: Fix for bug #23693 as suggested by Art R. Ensure cseg is unused
1019     if tcp_seg_copy fails.
1020
1021   2008-06-17 Simon Goldschmidt
1022   * inet_chksum.c: Checked in some ideas of patch #6460 (loop optimizations)
1023     and created defines for swapping bytes and folding u32 to u16.
1024
1025   2008-05-30 Kieran Mansley
1026   * tcp_in.c Remove redundant "if" statement, and use real rcv_wnd
1027     rather than rcv_ann_wnd when deciding if packets are in-window.
1028     Contributed by <arasmussen@consultant.datasys.swri.edu>
1029
1030   2008-05-30 Kieran Mansley
1031   * mem.h: Fix BUG#23254.  Change macro definition of mem_* to allow
1032     passing as function pointers when MEM_LIBC_MALLOC is defined.
1033
1034   2008-05-09 Jonathan Larmour
1035   * err.h, err.c, sockets.c: Fix bug #23119: Reorder timeout error code to
1036     stop it being treated as a fatal error.
1037
1038   2008-04-15 Simon Goldschmidt
1039   * dhcp.c: fixed bug #22804: dhcp_stop doesn't clear NETIF_FLAG_DHCP
1040     (flag now cleared)
1041
1042   2008-03-27 Simon Goldschmidt
1043   * mem.c, tcpip.c, tcpip.h, opt.h: fixed bug #21433 (Calling mem_free/pbuf_free
1044     from interrupt context isn't safe): set LWIP_USE_HEAP_FROM_INTERRUPT to 1
1045     in lwipopts.h or use pbuf_free_callback(p)/mem_free_callback(m) to free pbufs
1046     or heap memory from interrupt context
1047
1048   2008-03-26 Simon Goldschmidt
1049   * tcp_in.c, tcp.c: fixed bug #22249: division by zero could occur if a remote
1050     host sent a zero mss as TCP option.
1051
1052
1053 (STABLE-1.3.0)
1054
1055   ++ New features:
1056
1057   2008-03-10 Jonathan Larmour
1058   * inet_chksum.c: Allow choice of one of the sample algorithms to be
1059     made from lwipopts.h. Fix comment on how to override LWIP_CHKSUM.
1060
1061   2008-01-22 Frédéric Bernon
1062   * tcp.c, tcp_in.c, tcp.h, opt.h: Rename LWIP_CALCULATE_EFF_SEND_MSS in
1063     TCP_CALCULATE_EFF_SEND_MSS to have coherent TCP options names.
1064
1065   2008-01-14 Frédéric Bernon
1066   * rawapi.txt, api_msg.c, tcp.c, tcp_in.c, tcp.h: changes for task #7675 "Enable
1067     to refuse data on a TCP_EVENT_RECV call". Important, behavior changes for the
1068     tcp_recv callback (see rawapi.txt).
1069
1070   2008-01-14 Frédéric Bernon, Marc Chaland
1071   * ip.c: Integrate patch #6369" ip_input : checking before realloc".
1072
1073   2008-01-12 Frédéric Bernon
1074   * tcpip.h, tcpip.c, api.h, api_lib.c, api_msg.c, sockets.c: replace the field
1075     netconn::sem per netconn::op_completed like suggested for the task #7490
1076     "Add return value to sys_mbox_post".
1077
1078   2008-01-12 Frédéric Bernon
1079   * api_msg.c, opt.h: replace DEFAULT_RECVMBOX_SIZE per DEFAULT_TCP_RECVMBOX_SIZE,
1080     DEFAULT_UDP_RECVMBOX_SIZE and DEFAULT_RAW_RECVMBOX_SIZE (to optimize queues
1081     sizes), like suggested for the task #7490 "Add return value to sys_mbox_post".
1082
1083   2008-01-10 Frédéric Bernon
1084   * tcpip.h, tcpip.c: add tcpip_callback_with_block function for the task #7490
1085     "Add return value to sys_mbox_post". tcpip_callback is always defined as
1086     "blocking" ("block" parameter = 1).
1087
1088   2008-01-10 Frédéric Bernon
1089   * tcpip.h, tcpip.c, api.h, api_lib.c, api_msg.c, sockets.c: replace the field
1090     netconn::mbox (sys_mbox_t) per netconn::sem (sys_sem_t) for the task #7490
1091     "Add return value to sys_mbox_post".
1092
1093   2008-01-05 Frédéric Bernon
1094   * sys_arch.txt, api.h, api_lib.c, api_msg.h, api_msg.c, tcpip.c, sys.h, opt.h:
1095     Introduce changes for task #7490 "Add return value to sys_mbox_post" with some
1096     modifications in the sys_mbox api: sys_mbox_new take a "size" parameters which
1097     indicate the number of pointers query by the mailbox. There is three defines
1098     in opt.h to indicate sizes for tcpip::mbox, netconn::recvmbox, and for the
1099     netconn::acceptmbox. Port maintainers, you can decide to just add this new
1100     parameter in your implementation, but to ignore it to keep the previous behavior.
1101     The new sys_mbox_trypost function return a value to know if the mailbox is
1102     full or if the message is posted. Take a look to sys_arch.txt for more details.
1103     This new function is used in tcpip_input (so, can be called in an interrupt
1104     context since the function is not blocking), and in recv_udp and recv_raw.
1105
1106   2008-01-04 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
1107   * rawapi.txt, api.h, api_lib.c, api_msg.h, api_msg.c, sockets.c, tcp.h, tcp.c,
1108     tcp_in.c, init.c, opt.h: rename backlog options with TCP_ prefix, limit the
1109     "backlog" parameter in an u8_t, 0 is interpreted as "smallest queue", add
1110     documentation in the rawapi.txt file.
1111
1112   2007-12-31 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
1113   * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Add TCP persist timer
1114
1115   2007-12-31 Frédéric Bernon, Luca Ceresoli
1116   * autoip.c, etharp.c: ip_addr.h: Integrate patch #6348: "Broadcast ARP packets
1117     in autoip". The change in etharp_raw could be removed, since all calls to
1118     etharp_raw use ethbroadcast for the "ethdst_addr" parameter. But it could be
1119     wrong in the future.
1120
1121   2007-12-30 Frédéric Bernon, Tom Evans
1122   * ip.c: Fix bug #21846 "LwIP doesn't appear to perform any IP Source Address
1123     Filtering" reported by Tom Evans.
1124
1125   2007-12-21 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
1126   * tcp.h, opt.h, api.h, api_msg.h, tcp.c, tcp_in.c, api_lib.c, api_msg.c,
1127     sockets.c, init.c: task #7252: Implement TCP listen backlog: Warning: raw API
1128     applications have to call 'tcp_accepted(pcb)' in their accept callback to
1129     keep accepting new connections.
1130
1131   2007-12-13 Frédéric Bernon
1132   * api_msg.c, err.h, err.c, sockets.c, dns.c, dns.h: replace "enum dns_result"
1133     by err_t type. Add a new err_t code "ERR_INPROGRESS".
1134
1135   2007-12-12 Frédéric Bernon
1136   * dns.h, dns.c, opt.h: move DNS options to the "right" place. Most visibles
1137     are the one which have ram usage.
1138
1139   2007-12-05 Frédéric Bernon
1140   * netdb.c: add a LWIP_DNS_API_HOSTENT_STORAGE option to decide to use a static
1141     set of variables (=0) or a local one (=1). In this last case, your port should
1142     provide a function "struct hostent* sys_thread_hostent( struct hostent* h)"
1143     which have to do a copy of "h" and return a pointer ont the "per-thread" copy.
1144
1145   2007-12-03 Simon Goldschmidt
1146   * ip.c: ip_input: check if a packet is for inp first before checking all other
1147     netifs on netif_list (speeds up packet receiving in most cases)
1148
1149   2007-11-30 Simon Goldschmidt
1150   * udp.c, raw.c: task #7497: Sort lists (pcb, netif, ...) for faster access
1151     UDP: move a (connected) pcb selected for input to the front of the list of
1152     pcbs so that it is found faster next time. Same for RAW pcbs that have eaten
1153     a packet.
1154
1155   2007-11-28 Simon Goldschmidt
1156   * etharp.c, stats.c, stats.h, opt.h: Introduced ETHARP_STATS
1157
1158   2007-11-25 Simon Goldschmidt
1159   * dhcp.c: dhcp_unfold_reply() uses pbuf_copy_partial instead of its own copy
1160     algorithm.
1161
1162   2007-11-24 Simon Goldschmidt
1163   * netdb.h, netdb.c, sockets.h/.c: Moved lwip_gethostbyname from sockets.c
1164     to the new file netdb.c; included lwip_getaddrinfo.
1165
1166   2007-11-21 Simon Goldschmidt
1167   * tcp.h, opt.h, tcp.c, tcp_in.c: implemented calculating the effective send-mss
1168     based on the MTU of the netif used to send. Enabled by default. Disable by
1169     setting LWIP_CALCULATE_EFF_SEND_MSS to 0. This fixes bug #21492.
1170
1171   2007-11-19 Frédéric Bernon
1172   * api_msg.c, dns.h, dns.c: Implement DNS_DOES_NAME_CHECK option (check if name
1173     received match the name query), implement DNS_USES_STATIC_BUF (the place where
1174     copy dns payload to parse the response), return an error if there is no place
1175     for a new query, and fix some minor problems.
1176
1177   2007-11-16 Simon Goldschmidt
1178   * new files: ipv4/inet.c, ipv4/inet_chksum.c, ipv6/inet6.c
1179     removed files: core/inet.c, core/inet6.c
1180     Moved inet files into ipv4/ipv6 directory; splitted inet.c/inet.h into
1181     inet and chksum part; changed includes in all lwIP files as appropriate
1182
1183   2007-11-16 Simon Goldschmidt
1184   * api.h, api_msg.h, api_lib.c, api_msg.c, socket.h, socket.c: Added sequential
1185     dns resolver function for netconn api (netconn_gethostbyname) and socket api
1186     (gethostbyname/gethostbyname_r).
1187
1188   2007-11-15 Jim Pettinato, Frédéric Bernon
1189   * opt.h, init.c, tcpip.c, dhcp.c, dns.h, dns.c: add DNS client for simple name
1190     requests with RAW api interface. Initialization is done in lwip_init() with
1191     build time options. DNS timer is added in tcpip_thread context. DHCP can set
1192     DNS server ip addresses when options are received. You need to set LWIP_DNS=1
1193     in your lwipopts.h file (LWIP_DNS=0 in opt.h). DNS_DEBUG can be set to get
1194     some traces with LWIP_DEBUGF. Sanity check have been added. There is a "todo"
1195     list with points to improve.
1196
1197   2007-11-06 Simon Goldschmidt
1198   * opt.h, mib2.c: Patch #6215: added ifAdminStatus write support (if explicitly
1199     enabled by defining SNMP_SAFE_REQUESTS to 0); added code to check link status
1200     for ifOperStatus if LWIP_NETIF_LINK_CALLBACK is defined.
1201
1202   2007-11-06 Simon Goldschmidt
1203   * api.h, api_msg.h and dependent files: Task #7410: Removed the need to include
1204     core header files in api.h (ip/tcp/udp/raw.h) to hide the internal
1205     implementation from netconn api applications.
1206
1207   2007-11-03 Frédéric Bernon
1208   * api.h, api_lib.c, api_msg.c, sockets.c, opt.h: add SO_RCVBUF option for UDP &
1209     RAW netconn. You need to set LWIP_SO_RCVBUF=1 in your lwipopts.h (it's disabled
1210     by default). Netconn API users can use the netconn_recv_bufsize macro to access
1211     it. This is a first release which have to be improve for TCP. Note it used the
1212     netconn::recv_avail which need to be more "thread-safe" (note there is already
1213     the problem for FIONREAD with lwip_ioctl/ioctlsocket).
1214
1215   2007-11-01 Frédéric Bernon, Marc Chaland
1216   * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, tcp.h, tcp_out.c:
1217     Integrate "patch #6250 : MSG_MORE flag for send". MSG_MORE is used at socket api
1218     layer, NETCONN_MORE at netconn api layer, and TCP_WRITE_FLAG_MORE at raw api
1219     layer. This option enable to delayed TCP PUSH flag on multiple "write" calls.
1220     Note that previous "copy" parameter for "write" APIs is now called "apiflags".
1221
1222   2007-10-24 Frédéric Bernon
1223   * api.h, api_lib.c, api_msg.c: Add macro API_EVENT in the same spirit than
1224     TCP_EVENT_xxx macros to get a code more readable. It could also help to remove
1225     some code (like we have talk in "patch #5919 : Create compile switch to remove
1226     select code"), but it could be done later.
1227
1228   2007-10-08 Simon Goldschmidt
1229   * many files: Changed initialization: many init functions are not needed any
1230     more since we now rely on the compiler initializing global and static
1231     variables to zero!
1232
1233   2007-10-06 Simon Goldschmidt
1234   * ip_frag.c, memp.c, mib2.c, ip_frag.h, memp_std.h, opt.h: Changed IP_REASSEMBLY
1235     to enqueue the received pbufs so that multiple packets can be reassembled
1236     simultaneously and no static reassembly buffer is needed.
1237
1238   2007-10-05 Simon Goldschmidt
1239   * tcpip.c, etharp.h, etharp.c: moved ethernet_input from tcpip.c to etharp.c so
1240     all netifs (or ports) can use it.
1241
1242   2007-10-05 Frédéric Bernon
1243   * netifapi.h, netifapi.c: add function netifapi_netif_set_default. Change the
1244     common function to reduce a little bit the footprint (for all functions using
1245     only the "netif" parameter).
1246
1247   2007-10-03 Frédéric Bernon
1248   * netifapi.h, netifapi.c: add functions netifapi_netif_set_up, netifapi_netif_set_down,
1249     netifapi_autoip_start and netifapi_autoip_stop. Use a common function to reduce
1250     a little bit the footprint (for all functions using only the "netif" parameter).
1251
1252   2007-09-15 Frédéric Bernon
1253   * udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add IP_MULTICAST_IF
1254     option in socket API, and a new field "multicast_ip" in "struct udp_pcb" (for
1255     netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt processing for
1256     IP_MULTICAST_TTL and IP_MULTICAST_IF.
1257
1258   2007-09-10 Frédéric Bernon
1259   * snmp.h, mib2.c: enable to remove SNMP timer (which consumne several cycles
1260     even when it's not necessary). snmp_agent.txt tell to call snmp_inc_sysuptime()
1261     each 10ms (but, it's intrusive if you use sys_timeout feature). Now, you can
1262     decide to call snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but
1263     call to a lower frequency). Or, you can decide to not call snmp_inc_sysuptime()
1264     or snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
1265     This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
1266     snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
1267     when it's queried (any direct call to "sysuptime" is changed by a call to
1268     snmp_get_sysuptime).
1269
1270   2007-09-09 Frédéric Bernon, Bill Florac
1271   * igmp.h, igmp.c, netif.h, netif.c, ip.c: To enable to have interfaces with IGMP,
1272     and others without it, there is a new NETIF_FLAG_IGMP flag to set in netif->flags
1273     if you want IGMP on an interface. igmp_stop() is now called inside netif_remove().
1274     igmp_report_groups() is now called inside netif_set_link_up() (need to have
1275     LWIP_NETIF_LINK_CALLBACK=1) to resend reports once the link is up (avoid to wait
1276     the next query message to receive the matching multicast streams).
1277
1278   2007-09-08 Frédéric Bernon
1279   * sockets.c, ip.h, api.h, tcp.h: declare a "struct ip_pcb" which only contains
1280     IP_PCB. Add in the netconn's "pcb" union a "struct ip_pcb *ip;" (no size change).
1281     Use this new field to access to common pcb fields (ttl, tos, so_options, etc...).
1282     Enable to access to these fields with LWIP_TCP=0.
1283
1284   2007-09-05 Frédéric Bernon
1285   * udp.c, ipv4/icmp.c, ipv4/ip.c, ipv6/icmp.c, ipv6/ip6.c, ipv4/icmp.h,
1286     ipv6/icmp.h, opt.h: Integrate "task #7272 : LWIP_ICMP option". The new option
1287     LWIP_ICMP enable/disable ICMP module inside the IP stack (enable per default).
1288     Be careful, disabling ICMP make your product non-compliant to RFC1122, but
1289     help to reduce footprint, and to reduce "visibility" on the Internet.
1290
1291   2007-09-05 Frédéric Bernon, Bill Florac
1292   * opt.h, sys.h, tcpip.c, slipif.c, ppp.c, sys_arch.txt: Change parameters list
1293     for sys_thread_new (see "task #7252 : Create sys_thread_new_ex()"). Two new
1294     parameters have to be provided: a task name, and a task stack size. For this
1295     one, since it's platform dependant, you could define the best one for you in
1296     your lwipopts.h. For port maintainers, you can just add these new parameters
1297     in your sys_arch.c file, and but it's not mandatory, use them in your OS
1298     specific functions.
1299
1300   2007-09-05 Frédéric Bernon
1301   * inet.c, autoip.c, msg_in.c, msg_out.c, init.c: Move some build time checkings
1302     inside init.c for task #7142 "Sanity check user-configurable values".
1303
1304   2007-09-04 Frédéric Bernon, Bill Florac
1305   * igmp.h, igmp.c, memp_std.h, memp.c, init.c, opt.h: Replace mem_malloc call by
1306     memp_malloc, and use a new MEMP_NUM_IGMP_GROUP option (see opt.h to define the
1307     value). It will avoid potential fragmentation problems, use a counter to know
1308     how many times a group is used on an netif, and free it when all applications
1309     leave it. MEMP_NUM_IGMP_GROUP got 8 as default value (and init.c got a sanity
1310     check if LWIP_IGMP!=0).
1311
1312   2007-09-03 Frédéric Bernon
1313   * igmp.h, igmp.c, sockets.c, api_msg.c: Changes for "#20503 IGMP Improvement".
1314     Initialize igmp_mac_filter to NULL in netif_add (this field should be set in
1315     the netif's "init" function). Use the "imr_interface" field (for socket layer)
1316     and/or the "interface" field (for netconn layer), for join/leave operations.
1317     The igmp_join/leavegroup first parameter change from a netif to an ipaddr.
1318     This field could be a netif's ipaddr, or "any" (same meaning than ip_addr_isany).
1319
1320   2007-08-30 Frédéric Bernon
1321   * Add netbuf.h, netbuf.c, Change api.h, api_lib.c: #7249 "Split netbuf functions
1322     from api/api_lib". Now netbuf API is independant of netconn, and can be used
1323     with other API (application based on raw API, or future "socket2" API). Ports
1324     maintainers just have to add src/api/netbuf.c in their makefile/projects.
1325
1326   2007-08-30 Frédéric Bernon, Jonathan Larmour
1327   * init.c: Add first version of lwip_sanity_check for task #7142 "Sanity check
1328     user-configurable values".
1329
1330   2007-08-29 Frédéric Bernon
1331   * igmp.h, igmp.c, tcpip.c, init.c, netif.c: change igmp_init and add igmp_start.
1332     igmp_start is call inside netif_add. Now, igmp initialization is in the same
1333     spirit than the others modules. Modify some IGMP debug traces.
1334
1335   2007-08-29 Frédéric Bernon
1336   * Add init.h, init.c, Change opt.h, tcpip.c: Task  #7213 "Add a lwip_init function"
1337     Add lwip_init function to regroup all modules initializations, and to provide
1338     a place to add code for task #7142 "Sanity check user-configurable values".
1339     Ports maintainers should remove direct initializations calls from their code,
1340     and add init.c in their makefiles. Note that lwip_init() function is called
1341     inside tcpip_init, but can also be used by raw api users since all calls are
1342     disabled when matching options are disabled. Also note that their is new options
1343     in opt.h, you should configure in your lwipopts.h (they are enabled per default).
1344
1345   2007-08-26 Marc Boucher
1346   * api_msg.c: do_close_internal(): Reset the callbacks and arg (conn) to NULL
1347     since they can under certain circumstances be called with an invalid conn
1348     pointer after the connection has been closed (and conn has been freed).
1349
1350   2007-08-25 Frédéric Bernon (Artem Migaev's Patch)
1351   * netif.h, netif.c: Integrate "patch #6163 : Function to check if link layer is up".
1352     Add a netif_is_link_up() function if LWIP_NETIF_LINK_CALLBACK option is set.
1353
1354   2007-08-22 Frédéric Bernon
1355   * netif.h, netif.c, opt.h: Rename LWIP_NETIF_CALLBACK in LWIP_NETIF_STATUS_CALLBACK
1356     to be coherent with new LWIP_NETIF_LINK_CALLBACK option before next release.
1357
1358   2007-08-22 Frédéric Bernon
1359   * tcpip.h, tcpip.c, ethernetif.c, opt.h: remove options ETHARP_TCPIP_INPUT &
1360     ETHARP_TCPIP_ETHINPUT, now, only "ethinput" code is supported, even if the
1361     name is tcpip_input (we keep the name of 1.2.0 function).
1362
1363   2007-08-17 Jared Grubb
1364   * memp_std.h, memp.h, memp.c, mem.c, stats.c: (Task #7136) Centralize mempool
1365     settings into new memp_std.h and optional user file lwippools.h. This adds
1366     more dynamic mempools, and allows the user to create an arbitrary number of
1367     mempools for mem_malloc.
1368
1369   2007-08-16 Marc Boucher
1370   * api_msg.c: Initialize newconn->state to NETCONN_NONE in accept_function;
1371     otherwise it was left to NETCONN_CLOSE and sent_tcp() could prematurely
1372     close the connection.
1373
1374   2007-08-16 Marc Boucher
1375   * sockets.c: lwip_accept(): check netconn_peer() error return.
1376
1377   2007-08-16 Marc Boucher
1378   * mem.c, mem.h: Added mem_calloc().
1379
1380   2007-08-16 Marc Boucher
1381   * tcpip.c, tcpip.h memp.c, memp.h: Added distinct memp (MEMP_TCPIP_MSG_INPKT)
1382     for input packets to prevent floods from consuming all of MEMP_TCPIP_MSG
1383     and starving other message types.
1384     Renamed MEMP_TCPIP_MSG to MEMP_TCPIP_MSG_API
1385
1386   2007-08-16 Marc Boucher
1387   * pbuf.c, pbuf.h, etharp.c, tcp_in.c, sockets.c: Split pbuf flags in pbuf
1388     type and flgs (later renamed to flags).
1389     Use enum pbuf_flag as pbuf_type.  Renumber PBUF_FLAG_*.
1390     Improved lwip_recvfrom().  TCP push now propagated.
1391
1392   2007-08-16 Marc Boucher
1393   * ethernetif.c, contrib/ports/various: ethbroadcast now a shared global
1394     provided by etharp.
1395
1396   2007-08-16 Marc Boucher
1397   * ppp_oe.c ppp_oe.h, auth.c chap.c fsm.c lcp.c ppp.c ppp.h,
1398     etharp.c ethernetif.c, etharp.h, opt.h tcpip.h, tcpip.c:
1399     Added PPPoE support and various PPP improvements.
1400
1401   2007-07-25 Simon Goldschmidt
1402   * api_lib.c, ip_frag.c, pbuf.c, api.h, pbuf.h: Introduced pbuf_copy_partial,
1403     making netbuf_copy_partial use this function.
1404
1405   2007-07-25 Simon Goldschmidt
1406   * tcp_in.c: Fix bug #20506: Slow start / initial congestion window starts with
1407     2 * mss (instead of 1 * mss previously) to comply with some newer RFCs and
1408     other stacks.
1409
1410   2007-07-13 Jared Grubb (integrated by Frédéric Bernon)
1411   * opt.h, netif.h, netif.c, ethernetif.c: Add new configuration option to add
1412     a link callback in the netif struct, and functions to handle it. Be carefull
1413     for port maintainers to add the NETIF_FLAG_LINK_UP flag (like in ethernetif.c)
1414     if you want to be sure to be compatible with future changes...
1415
1416   2007-06-30 Frédéric Bernon
1417   * sockets.h, sockets.c: Implement MSG_PEEK flag for recv/recvfrom functions.
1418
1419   2007-06-21 Simon Goldschmidt
1420   * etharp.h, etharp.c: Combined etharp_request with etharp_raw for both
1421     LWIP_AUTOIP =0 and =1 to remove redundant code.
1422
1423   2007-06-21 Simon Goldschmidt
1424   * mem.c, memp.c, mem.h, memp.h, opt.h: task #6863: Introduced the option
1425     MEM_USE_POOLS to use 4 pools with different sized elements instead of a
1426     heap. This both prevents memory fragmentation and gives a higher speed
1427     at the cost of more memory consumption. Turned off by default.
1428
1429   2007-06-21 Simon Goldschmidt
1430   * api_lib.c, api_msg.c, api.h, api_msg.h: Converted the length argument of
1431     netconn_write (and therefore also api_msg_msg.msg.w.len) from u16_t into
1432     int to be able to send a bigger buffer than 64K with one time (mainly
1433     used from lwip_send).
1434
1435   2007-06-21 Simon Goldschmidt
1436   * tcp.h, api_msg.c: Moved the nagle algorithm from netconn_write/do_write
1437     into a define (tcp_output_nagle) in tcp.h to provide it to raw api users, too.
1438
1439   2007-06-21 Simon Goldschmidt
1440   * api.h, api_lib.c, api_msg.c: Fixed bug #20021: Moved sendbuf-processing in
1441     netconn_write from api_lib.c to api_msg.c to also prevent multiple context-
1442     changes on low memory or empty send-buffer.
1443
1444   2007-06-18 Simon Goldschmidt
1445   * etharp.c, etharp.h: Changed etharp to use a defined hardware address length
1446     of 6 to avoid loading netif->hwaddr_len every time (since this file is only
1447     used for ethernet and struct eth_addr already had a defined length of 6).
1448
1449   2007-06-17 Simon Goldschmidt
1450   * sockets.c, sockets.h: Implemented socket options SO_NO_CHECK for UDP sockets
1451     to disable UDP checksum generation on transmit.
1452
1453   2007-06-13 Frédéric Bernon, Simon Goldschmidt
1454   * debug.h, api_msg.c: change LWIP_ERROR to use it to check errors like invalid
1455     pointers or parameters, and let the possibility to redefined it in cc.h. Use
1456     this macro to check "conn" parameter in api_msg.c functions.
1457
1458   2007-06-11 Simon Goldschmidt
1459   * sockets.c, sockets.h: Added UDP lite support for sockets
1460
1461   2007-06-10 Simon Goldschmidt
1462   * udp.h, opt.h, api_msg.c, ip.c, udp.c: Included switch LWIP_UDPLITE (enabled
1463     by default) to switch off UDP-Lite support if not needed (reduces udp.c code
1464     size)
1465
1466   2007-06-09 Dominik Spies (integrated by Frédéric Bernon)
1467   * autoip.h, autoip.c, dhcp.h, dhcp.c, netif.h, netif.c, etharp.h, etharp.c, opt.h:
1468     AutoIP implementation available for IPv4, with new options LWIP_AUTOIP and
1469     LWIP_DHCP_AUTOIP_COOP if you want to cooperate with DHCP. Some tips to adapt
1470     (see TODO mark in the source code).
1471
1472   2007-06-09 Simon Goldschmidt
1473   * etharp.h, etharp.c, ethernetif.c: Modified order of parameters for
1474     etharp_output() to match netif->output so etharp_output() can be used
1475     directly as netif->output to save one function call.
1476
1477   2007-06-08 Simon Goldschmidt
1478   * netif.h, ethernetif.c, slipif.c, loopif.c: Added define
1479     NETIF_INIT_SNMP(netif, type, speed) to initialize per-netif snmp variables,
1480     added initialization of those to ethernetif, slipif and loopif.
1481
1482   2007-05-18 Simon Goldschmidt
1483   * opt.h, ip_frag.c, ip_frag.h, ip.c: Added option IP_FRAG_USES_STATIC_BUF
1484     (defaulting to off for now) that can be set to 0 to send fragmented
1485     packets by passing PBUF_REFs down the stack.
1486
1487   2007-05-23 Frédéric Bernon
1488   * api_lib.c: Implement SO_RCVTIMEO for accept and recv on TCP
1489     connections, such present in patch #5959.
1490
1491   2007-05-23 Frédéric Bernon
1492   * api.h, api_lib.c, api_msg.c, sockets.c: group the different NETCONN_UDPxxx
1493     code in only one part...
1494
1495   2007-05-18 Simon Goldschmidt
1496   * opt.h, memp.h, memp.c: Added option MEMP_OVERFLOW_CHECK to check for memp
1497     elements to overflow. This is achieved by adding some bytes before and after
1498     each pool element (increasing their size, of course), filling them with a
1499     prominent value and checking them on freeing the element.
1500     Set it to 2 to also check every element in every pool each time memp_malloc()
1501     or memp_free() is called (slower but more helpful).
1502
1503   2007-05-10 Simon Goldschmidt
1504   * opt.h, memp.h, memp.c, pbuf.c (see task #6831): use a new memp pool for
1505     PBUF_POOL pbufs instead of the old pool implementation in pbuf.c to reduce
1506     code size.
1507
1508   2007-05-11 Frédéric Bernon
1509   * sockets.c, api_lib.c, api_msg.h, api_msg.c, netifapi.h, netifapi.c, tcpip.c:
1510     Include a function pointer instead of a table index in the message to reduce
1511     footprint. Disable some part of lwip_send and lwip_sendto if some options are
1512     not set (LWIP_TCP, LWIP_UDP, LWIP_RAW).
1513
1514   2007-05-10 Simon Goldschmidt
1515   * *.h (except netif/ppp/*.h): Included patch #5448: include '#ifdef __cplusplus
1516     \ extern "C" {' in all header files. Now you can write your application using
1517     the lwIP stack in C++ and simply #include the core files. Note I have left
1518     out the netif/ppp/*h header files for now, since I don't know which files are
1519     included by applications and which are for internal use only.
1520
1521   2007-05-09 Simon Goldschmidt
1522   * opt.h, *.c/*.h: Included patch #5920: Create define to override C-library
1523     memcpy. 2 Defines are created: MEMCPY() for normal memcpy, SMEMCPY() for
1524     situations where some compilers might inline the copy and save a function
1525     call. Also replaced all calls to memcpy() with calls to (S)MEMCPY().
1526
1527   2007-05-08 Simon Goldschmidt
1528   * mem.h: If MEM_LIBC_MALLOC==1, allow the defines (e.g. mem_malloc() -> malloc())
1529     to be overriden in case the C-library malloc implementation is not protected
1530     against concurrent access.
1531
1532   2007-05-04 Simon Goldschmidt (Atte Kojo)
1533   * etharp.c: Introduced fast one-entry-cache to speed up ARP lookup when sending
1534     multiple packets to the same host.
1535
1536   2007-05-04 Frédéric Bernon, Jonathan Larmour
1537   * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fix bug #19162 "lwip_sento: a possible
1538     to corrupt remote addr/port connection state". Reduce problems "not enought memory" with
1539     netbuf (if we receive lot of datagrams). Improve lwip_sendto (only one exchange between
1540     sockets api and api_msg which run in tcpip_thread context). Add netconn_sento function.
1541     Warning, if you directly access to "fromaddr" & "fromport" field from netbuf struct,
1542     these fields are now renamed "addr" & "port".
1543
1544   2007-04-11 Jonathan Larmour
1545   * sys.h, api_lib.c: Provide new sys_mbox_tryfetch function. Require ports to provide new
1546     sys_arch_mbox_tryfetch function to get a message if one is there, otherwise return
1547     with SYS_MBOX_EMPTY. sys_arch_mbox_tryfetch can be implemented as a function-like macro
1548     by the port in sys_arch.h if desired.
1549
1550   2007-04-06 Frédéric Bernon, Simon Goldschmidt
1551   * opt.h, tcpip.h, tcpip.c, netifapi.h, netifapi.c: New configuration option LWIP_NETIF_API
1552     allow to use thread-safe functions to add/remove netif in list, and to start/stop dhcp
1553     clients, using new functions from netifapi.h. Disable as default (no port change to do).
1554
1555   2007-04-05 Frédéric Bernon
1556   * sockets.c: remplace ENOBUFS errors on alloc_socket by ENFILE to be more BSD compliant.
1557
1558   2007-04-04 Simon Goldschmidt
1559   * arch.h, api_msg.c, dhcp.c, msg_in.c, sockets.c: Introduced #define LWIP_UNUSED_ARG(x)
1560     use this for and architecture-independent form to tell the compiler you intentionally
1561     are not using this variable. Can be overriden in cc.h.
1562
1563   2007-03-28 Frédéric Bernon
1564   * opt.h, netif.h, dhcp.h, dhcp.c: New configuration option LWIP_NETIF_HOSTNAME allow to
1565     define a hostname in netif struct (this is just a pointer, so, you can use a hardcoded
1566     string, point on one of your's ethernetif field, or alloc a string you will free yourself).
1567     It will be used by DHCP to register a client hostname, but can also be use when you call
1568     snmp_set_sysname.
1569
1570   2007-03-28 Frédéric Bernon
1571   * netif.h, netif.c: A new NETIF_FLAG_ETHARP flag is defined in netif.h, to allow to
1572     initialize a network interface's flag with. It tell this interface is an ethernet
1573     device, and we can use ARP with it to do a "gratuitous ARP" (RFC 3220 "IP Mobility
1574     Support for IPv4" section 4.6) when interface is "up" with netif_set_up().
1575
1576   2007-03-26 Frédéric Bernon, Jonathan Larmour
1577   * opt.h, tcpip.c: New configuration option LWIP_ARP allow to disable ARP init at build
1578     time if you only use PPP or SLIP. The default is enable. Note we don't have to call
1579     etharp_init in your port's initilization sequence if you use tcpip.c, because this call
1580     is done in tcpip_init function.
1581
1582   2007-03-22 Frédéric Bernon
1583   * stats.h, stats.c, msg_in.c: Stats counters can be change to u32_t if necessary with the
1584     new option LWIP_STATS_LARGE. If you need this option, define LWIP_STATS_LARGE to 1 in
1585     your lwipopts.h. More, unused counters are not defined in the stats structs, and not
1586     display by stats_display(). Note that some options (SYS_STATS and RAW_STATS) are defined
1587     but never used. Fix msg_in.c with the correct #if test for a stat display.
1588
1589   2007-03-21 Kieran Mansley
1590   * netif.c, netif.h: Apply patch#4197 with some changes (originator: rireland@hmgsl.com).
1591     Provides callback on netif up/down state change.
1592
1593   2007-03-11 Frédéric Bernon, Mace Gael, Steve Reynolds
1594   * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, igmp.h, igmp.c,
1595     ip.c, netif.h, tcpip.c, opt.h:
1596     New configuration option LWIP_IGMP to enable IGMP processing. Based on only one
1597     filter per all network interfaces. Declare a new function in netif to enable to
1598     control the MAC filter (to reduce lwIP traffic processing).
1599
1600   2007-03-11 Frédéric Bernon
1601   * tcp.h, tcp.c, sockets.c, tcp_out.c, tcp_in.c, opt.h: Keepalive values can
1602     be configured at run time with LWIP_TCP_KEEPALIVE, but don't change this
1603     unless you know what you're doing (default are RFC1122 compliant). Note
1604     that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set in seconds.
1605
1606   2007-03-08 Frédéric Bernon
1607   * tcp.h: Keepalive values can be configured at compile time, but don't change
1608     this unless you know what you're doing (default are RFC1122 compliant).
1609
1610   2007-03-08 Frédéric Bernon
1611   * sockets.c, api.h, api_lib.c, tcpip.c, sys.h, sys.c, err.c, opt.h:
1612     Implement LWIP_SO_RCVTIMEO configuration option to enable/disable SO_RCVTIMEO
1613     on UDP sockets/netconn.
1614
1615   2007-03-08 Simon Goldschmidt
1616   * snmp_msg.h, msg_in.c: SNMP UDP ports can be configured at compile time.
1617
1618   2007-03-06 Frédéric Bernon
1619   * api.h, api_lib.c, sockets.h, sockets.c, tcpip.c, sys.h, sys.c, err.h:
1620     Implement SO_RCVTIMEO on UDP sockets/netconn.
1621
1622   2007-02-28 Kieran Mansley (based on patch from Simon Goldschmidt)
1623   * api_lib.c, tcpip.c, memp.c, memp.h: make API msg structs allocated
1624     on the stack and remove the API msg type from memp
1625
1626   2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
1627   * sockets.h, sockets.c: Move socket initialization to new
1628     lwip_socket_init() function.
1629     NOTE: this changes the API with ports. Ports will have to be
1630     updated to call lwip_socket_init() now.
1631
1632   2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
1633   * api_lib.c: Use memcpy in netbuf_copy_partial.
1634
1635
1636   ++ Bug fixes:
1637
1638   2008-03-17 Frédéric Bernon, Ed Kerekes
1639   * igmp.h, igmp.c: Fix bug #22613 "IGMP iphdr problem" (could have
1640     some problems to fill the IP header on some targets, use now the
1641     ip.h macros to do it).
1642
1643   2008-03-13 Frédéric Bernon
1644   * sockets.c: Fix bug #22435 "lwip_recvfrom with TCP break;". Using
1645     (lwip_)recvfrom with valid "from" and "fromlen" parameters, on a
1646     TCP connection caused a crash. Note that using (lwip_)recvfrom
1647     like this is a bit slow and that using (lwip)getpeername is the
1648     good lwip way to do it (so, using recv is faster on tcp sockets).
1649
1650   2008-03-12 Frédéric Bernon, Jonathan Larmour
1651   * api_msg.c, contrib/apps/ping.c: Fix bug #22530 "api_msg.c's
1652     recv_raw() does not consume data", and the ping sample (with
1653     LWIP_SOCKET=1, the code did the wrong supposition that lwip_recvfrom
1654     returned the IP payload, without the IP header).
1655
1656   2008-03-04 Jonathan Larmour
1657   * mem.c, stats.c, mem.h: apply patch #6414 to avoid compiler errors
1658   and/or warnings on some systems where mem_size_t and size_t differ.
1659   * pbuf.c, ppp.c: Fix warnings on some systems with mem_malloc.
1660
1661   2008-03-04 Kieran Mansley (contributions by others)
1662   * Numerous small compiler error/warning fixes from contributions to
1663     mailing list after 1.3.0 release candidate made.
1664
1665   2008-01-25 Cui hengbin (integrated by Frédéric Bernon)
1666   * dns.c: Fix bug #22108 "DNS problem" caused by unaligned structures.
1667
1668   2008-01-15 Kieran Mansley
1669   * tcp_out.c: BUG20511.  Modify persist timer to start when we are
1670     prevented from sending by a small send window, not just a zero
1671     send window.
1672
1673   2008-01-09 Jonathan Larmour
1674   * opt.h, ip.c: Rename IP_OPTIONS define to IP_OPTIONS_ALLOWED to avoid
1675     conflict with Linux system headers.
1676
1677   2008-01-06 Jonathan Larmour
1678   * dhcp.c: fix bug #19927: "DHCP NACK problem" by clearing any existing set IP
1679     address entirely on receiving a DHCPNAK, and restarting discovery.
1680
1681   2007-12-21 Simon Goldschmidt
1682   * sys.h, api_lib.c, api_msg.c, sockets.c: fix bug #21698: "netconn->recv_avail
1683     is not protected" by using new macros for interlocked access to modify/test
1684     netconn->recv_avail.
1685
1686   2007-12-20 Kieran Mansley (based on patch from Oleg Tyshev)
1687   * tcp_in.c: fix bug# 21535 (nrtx not reset correctly in SYN_SENT state)
1688
1689   2007-12-20 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
1690   * tcp.c, tcp_in.c, tcp_out.c, tcp.h: fix bug #20199 (better handling
1691     of silly window avoidance and prevent lwIP from shrinking the window)
1692
1693   2007-12-04 Simon Goldschmidt
1694   * tcp.c, tcp_in.c: fix bug #21699 (segment leak in ooseq processing when last
1695     data packet was lost): add assert that all segment lists are empty in
1696     tcp_pcb_remove before setting pcb to CLOSED state; don't directly set CLOSED
1697     state from LAST_ACK in tcp_process
1698
1699   2007-12-02 Simon Goldschmidt
1700   * sockets.h: fix bug #21654: exclude definition of struct timeval from #ifndef FD_SET
1701     If including <sys/time.h> for system-struct timeval, LWIP_TIMEVAL_PRIVATE now
1702     has to be set to 0 in lwipopts.h
1703
1704   2007-12-02 Simon Goldschmidt
1705   * api_msg.c, api_lib.c: fix bug #21656 (recvmbox problem in netconn API): always
1706     allocate a recvmbox in netconn_new_with_proto_and_callback. For a tcp-listen
1707     netconn, this recvmbox is later freed and a new mbox is allocated for acceptmbox.
1708     This is a fix for thread-safety and allocates all items needed for a netconn
1709     when the netconn is created.
1710
1711   2007-11-30 Simon Goldschmidt
1712   * udp.c: first attempt to fix bug #21655 (DHCP doesn't work reliably with multiple
1713     netifs): if LWIP_DHCP is enabled, UDP packets to DHCP_CLIENT_PORT are passed
1714     to netif->dhcp->pcb only (if that exists) and not to any other pcb for the same
1715     port (only solution to let UDP pcbs 'bind' to a netif instead of an IP address)
1716
1717   2007-11-27 Simon Goldschmidt
1718   * ip.c: fixed bug #21643 (udp_send/raw_send don't fail if netif is down) by
1719     letting ip_route only use netifs that are up.
1720
1721   2007-11-27 Simon Goldschmidt
1722   * err.h, api_lib.c, api_msg.c, sockets.c: Changed error handling: ERR_MEM, ERR_BUF
1723     and ERR_RTE are seen as non-fatal, all other errors are fatal. netconns and
1724     sockets block most operations once they have seen a fatal error.
1725
1726   2007-11-27 Simon Goldschmidt
1727   * udp.h, udp.c, dhcp.c: Implemented new function udp_sendto_if which takes the
1728     netif to send as an argument (to be able to send on netifs that are down).
1729
1730   2007-11-26 Simon Goldschmidt
1731   * tcp_in.c: Fixed bug #21582: pcb->acked accounting can be wrong when ACKs
1732     arrive out-of-order
1733
1734   2007-11-21 Simon Goldschmidt
1735   * tcp.h, tcp_out.c, api_msg.c: Fixed bug #20287: tcp_output_nagle sends too early
1736     Fixed the nagle algorithm; nagle now also works for all raw API applications
1737     and has to be explicitly disabled with 'tcp_pcb->flags |= TF_NODELAY'
1738
1739   2007-11-12 Frédéric Bernon
1740   * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fixed bug #20900. Now, most
1741     of the netconn_peer and netconn_addr processing is done inside tcpip_thread
1742     context in do_getaddr.
1743
1744   2007-11-10 Simon Goldschmidt
1745   * etharp.c: Fixed bug: assert fired when MEMP_ARP_QUEUE was empty (which can
1746     happen any time). Now the packet simply isn't enqueued when out of memory.
1747
1748   2007-11-01 Simon Goldschmidt
1749   * tcp.c, tcp_in.c: Fixed bug #21494: The send mss (pcb->mss) is set to 536 (or
1750     TCP_MSS if that is smaller) as long as no MSS option is received from the
1751     remote host.
1752
1753   2007-11-01 Simon Goldschmidt
1754   * tcp.h, tcp.c, tcp_in.c: Fixed bug #21491: The MSS option sent (with SYN)
1755     is now based on TCP_MSS instead of pcb->mss (on passive open now effectively
1756     sending our configured TCP_MSS instead of the one received).
1757
1758   2007-11-01 Simon Goldschmidt
1759   * tcp_in.c: Fixed bug #21181: On active open, the initial congestion window was
1760     calculated based on the configured TCP_MSS, not on the MSS option received
1761     with SYN+ACK.
1762
1763   2007-10-09 Simon Goldschmidt
1764   * udp.c, inet.c, inet.h: Fixed UDPLite: send: Checksum was always generated too
1765     short and also was generated wrong if checksum coverage != tot_len;
1766     receive: checksum was calculated wrong if checksum coverage != tot_len
1767
1768   2007-10-08 Simon Goldschmidt
1769   * mem.c: lfree was not updated in mem_realloc!
1770
1771   2007-10-07 Frédéric Bernon
1772   * sockets.c, api.h, api_lib.c: First step to fix "bug #20900 : Potential
1773     crash error problem with netconn_peer & netconn_addr". VERY IMPORTANT:
1774     this change cause an API breakage for netconn_addr, since a parameter
1775     type change. Any compiler should cause an error without any changes in
1776     yours netconn_peer calls (so, it can't be a "silent change"). It also
1777     reduce a little bit the footprint for socket layer (lwip_getpeername &
1778     lwip_getsockname use now a common lwip_getaddrname function since
1779     netconn_peer & netconn_addr have the same parameters).
1780
1781   2007-09-20 Simon Goldschmidt
1782   * tcp.c: Fixed bug #21080 (tcp_bind without check pcbs in TIME_WAIT state)
1783     by checking  tcp_tw_pcbs also
1784
1785   2007-09-19 Simon Goldschmidt
1786   * icmp.c: Fixed bug #21107 (didn't reset IP TTL in ICMP echo replies)
1787
1788   2007-09-15 Mike Kleshov
1789   * mem.c: Fixed bug #21077 (inaccuracy in calculation of lwip_stat.mem.used)
1790
1791   2007-09-06 Frédéric Bernon
1792   * several-files: replace some #include "arch/cc.h" by "lwip/arch.h", or simply remove
1793     it as long as "lwip/opt.h" is included before (this one include "lwip/debug.h" which
1794     already include "lwip/arch.h"). Like that, default defines are provided by "lwip/arch.h"
1795     if they are not defined in cc.h, in the same spirit than "lwip/opt.h" for lwipopts.h.
1796
1797   2007-08-30 Frédéric Bernon
1798   * igmp.h, igmp.c: Some changes to remove some redundant code, add some traces,
1799     and fix some coding style.
1800
1801   2007-08-28 Frédéric Bernon
1802   * tcpip.c: Fix TCPIP_MSG_INPKT processing: now, tcpip_input can be used for any
1803     kind of packets. These packets are considered like Ethernet packets (payload
1804     pointing to ethhdr) if the netif got the NETIF_FLAG_ETHARP flag. Else, packets
1805     are considered like IP packets (payload pointing to iphdr).
1806
1807   2007-08-27 Frédéric Bernon
1808   * api.h, api_lib.c, api_msg.c: First fix for "bug #20900 : Potential crash error
1809     problem with netconn_peer & netconn_addr". Introduce NETCONN_LISTEN netconn_state
1810     and remove obsolete ones (NETCONN_RECV & NETCONN_ACCEPT).
1811
1812   2007-08-24 Kieran Mansley
1813   * inet.c Modify (acc >> 16) test to ((acc >> 16) != 0) to help buggy
1814     compiler (Paradigm C++)
1815
1816   2007-08-09 Frédéric Bernon, Bill Florac
1817   * stats.h, stats.c, igmp.h, igmp.c, opt.h: Fix for bug #20503 : IGMP Improvement.
1818     Introduce IGMP_STATS to centralize statistics management.
1819
1820   2007-08-09 Frédéric Bernon, Bill Florac
1821   * udp.c: Fix for bug #20503 : IGMP Improvement. Enable to receive a multicast
1822     packet on a udp pcb binded on an netif's IP address, and not on "any".
1823
1824   2007-08-09 Frédéric Bernon, Bill Florac
1825   * igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement.
1826     This is mainly on using lookup/lookfor, and some coding styles...
1827
1828   2007-07-26 Frédéric Bernon (and "thedoctor")
1829   * igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.
1830
1831   2007-07-25 Simon Goldschmidt
1832   * api_msg.c, tcp.c: Another fix for bug #20021: by not returning an error if
1833     tcp_output fails in tcp_close, the code in do_close_internal gets simpler
1834     (tcp_output is called again later from tcp timers).
1835
1836   2007-07-25 Simon Goldschmidt
1837   * ip_frag.c: Fixed bug #20429: use the new pbuf_copy_partial instead of the old
1838     copy_from_pbuf, which illegally modified the given pbuf.
1839
1840   2007-07-25 Simon Goldschmidt
1841   * tcp_out.c: tcp_enqueue: pcb->snd_queuelen didn't work for chaine PBUF_RAMs:
1842     changed snd_queuelen++ to snd_queuelen += pbuf_clen(p).
1843
1844   2007-07-24 Simon Goldschmidt
1845   * api_msg.c, tcp.c: Fix bug #20480: Check the pcb passed to tcp_listen() for the
1846     correct state (must be CLOSED).
1847
1848   2007-07-13 Thomas Taranowski (commited by Jared Grubb)
1849   * memp.c: Fix bug #20478: memp_malloc returned NULL+MEMP_SIZE on failed
1850     allocation. It now returns NULL.
1851
1852   2007-07-13 Frédéric Bernon
1853   * api_msg.c: Fix bug #20318: api_msg "recv" callbacks don't call pbuf_free in
1854     all error cases.
1855
1856   2007-07-13 Frédéric Bernon
1857   * api_msg.c: Fix bug #20315: possible memory leak problem if tcp_listen failed,
1858     because current code doesn't follow rawapi.txt documentation.
1859
1860   2007-07-13 Kieran Mansley
1861   * src/core/tcp_in.c Apply patch#5741 from Oleg Tyshev to fix bug in
1862     out of sequence processing of received packets
1863
1864   2007-07-03 Simon Goldschmidt
1865   * nearly-all-files: Added assertions where PBUF_RAM pbufs are used and an
1866     assumption is made that this pbuf is in one piece (i.e. not chained). These
1867     assumptions clash with the possibility of converting to fully pool-based
1868     pbuf implementations, where PBUF_RAM pbufs might be chained.
1869
1870   2007-07-03 Simon Goldschmidt
1871   * api.h, api_lib.c, api_msg.c: Final fix for bug #20021 and some other problems
1872     when closing tcp netconns: removed conn->sem, less context switches when
1873     closing, both netconn_close and netconn_delete should safely close tcp
1874     connections.
1875
1876   2007-07-02 Simon Goldschmidt
1877   * ipv4/ip.h, ipv6/ip.h, opt.h, netif.h, etharp.h, ipv4/ip.c, netif.c, raw.c,
1878     tcp_out.c, udp.c, etharp.c: Added option LWIP_NETIF_HWADDRHINT (default=off)
1879     to cache ARP table indices with each pcb instead of single-entry cache for
1880     the complete stack.
1881
1882   2007-07-02 Simon Goldschmidt
1883   * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Added some ASSERTS and casts to prevent
1884     warnings when assigning to smaller types.
1885
1886   2007-06-28 Simon Goldschmidt
1887   * tcp_out.c: Added check to prevent tcp_pcb->snd_queuelen from overflowing.
1888
1889   2007-06-28 Simon Goldschmidt
1890   * tcp.h: Fixed bug #20287: Fixed nagle algorithm (sending was done too early if
1891     a segment contained chained pbufs)
1892
1893   2007-06-28 Frédéric Bernon
1894   * autoip.c: replace most of rand() calls by a macro LWIP_AUTOIP_RAND which compute
1895     a "pseudo-random" value based on netif's MAC and some autoip fields. It's always
1896     possible to define this macro in your own lwipopts.h to always use C library's
1897     rand(). Note that autoip_create_rand_addr doesn't use this macro.
1898
1899   2007-06-28 Frédéric Bernon
1900   * netifapi.h, netifapi.c, tcpip.h, tcpip.c: Update code to handle the option
1901     LWIP_TCPIP_CORE_LOCKING, and do some changes to be coherent with last modifications
1902     in api_lib/api_msg (use pointers and not type with table, etc...)
1903
1904   2007-06-26 Simon Goldschmidt
1905   * udp.h: Fixed bug #20259: struct udp_hdr was lacking the packin defines.
1906
1907   2007-06-25 Simon Goldschmidt
1908   * udp.c: Fixed bug #20253: icmp_dest_unreach was called with a wrong p->payload
1909     for udp packets with no matching pcb.
1910
1911   2007-06-25 Simon Goldschmidt
1912   * udp.c: Fixed bug #20220: UDP PCB search in udp_input(): a non-local match
1913     could get udp input packets if the remote side matched.
1914
1915   2007-06-13 Simon Goldschmidt
1916   * netif.c: Fixed bug #20180 (TCP pcbs listening on IP_ADDR_ANY could get
1917     changed in netif_set_ipaddr if previous netif->ip_addr.addr was 0.
1918
1919   2007-06-13 Simon Goldschmidt
1920   * api_msg.c: pcb_new sets conn->err if protocol is not implemented
1921     -> netconn_new_..() does not allocate a new connection for unsupported
1922     protocols.
1923
1924   2007-06-13 Frédéric Bernon, Simon Goldschmidt
1925   * api_lib.c: change return expression in netconn_addr and netconn_peer, because
1926     conn->err was reset to ERR_OK without any reasons (and error was lost)...
1927
1928   2007-06-13 Frédéric Bernon, Matthias Weisser
1929   * opt.h, mem.h, mem.c, memp.c, pbuf.c, ip_frag.c, vj.c: Fix bug #20162. Rename
1930     MEM_ALIGN in LWIP_MEM_ALIGN and MEM_ALIGN_SIZE in LWIP_MEM_ALIGN_SIZE to avoid
1931     some macro names collision with some OS macros.
1932
1933   2007-06-11 Simon Goldschmidt
1934   * udp.c: UDP Lite: corrected the use of chksum_len (based on RFC3828: if it's 0,
1935     create checksum over the complete packet. On RX, if it's < 8 (and not 0),
1936     discard the packet. Also removed the duplicate 'udphdr->chksum = 0' for both
1937     UDP & UDP Lite.
1938
1939   2007-06-11 Srinivas Gollakota & Oleg Tyshev
1940   * tcp_out.c: Fix for bug #20075 : "A problem with keep-alive timer and TCP flags"
1941     where TCP flags wasn't initialized in tcp_keepalive.
1942
1943   2007-06-03 Simon Goldschmidt
1944   * udp.c: udp_input(): Input pbuf was not freed if pcb had no recv function
1945     registered, p->payload was modified without modifying p->len if sending
1946     icmp_dest_unreach() (had no negative effect but was definitively wrong).
1947
1948   2007-06-03 Simon Goldschmidt
1949   * icmp.c: Corrected bug #19937: For responding to an icmp echo request, icmp
1950     re-used the input pbuf even if that didn't have enough space to include the
1951     link headers. Now the space is tested and a new pbuf is allocated for the
1952     echo response packet if the echo request pbuf isn't big enough.
1953
1954   2007-06-01 Simon Goldschmidt
1955   * sockets.c: Checked in patch #5914: Moved sockopt processing into tcpip_thread.
1956
1957   2007-05-23 Frédéric Bernon
1958   * api_lib.c, sockets.c: Fixed bug #5958 for netconn_listen (acceptmbox only
1959     allocated by do_listen if success) and netconn_accept errors handling. In
1960     most of api_lib functions, we replace some errors checkings like "if (conn==NULL)"
1961     by ASSERT, except for netconn_delete.
1962
1963   2007-05-23 Frédéric Bernon
1964   * api_lib.c: Fixed bug #5957 "Safe-thread problem inside netconn_recv" to return
1965     an error code if it's impossible to fetch a pbuf on a TCP connection (and not
1966     directly close the recvmbox).
1967
1968   2007-05-22 Simon Goldschmidt
1969   * tcp.c: Fixed bug #1895 (tcp_bind not correct) by introducing a list of
1970     bound but unconnected (and non-listening) tcp_pcbs.
1971
1972   2007-05-22 Frédéric Bernon
1973   * sys.h, sys.c, api_lib.c, tcpip.c: remove sys_mbox_fetch_timeout() (was only
1974     used for LWIP_SO_RCVTIMEO option) and use sys_arch_mbox_fetch() instead of
1975     sys_mbox_fetch() in api files. Now, users SHOULD NOT use internal lwIP features
1976     like "sys_timeout" in their application threads.
1977
1978   2007-05-22 Frédéric Bernon
1979   * api.h, api_lib.c, api_msg.h, api_msg.c: change the struct api_msg_msg to see
1980     which parameters are used by which do_xxx function, and to avoid "misusing"
1981     parameters (patch #5938).
1982
1983   2007-05-22 Simon Goldschmidt
1984   * api_lib.c, api_msg.c, raw.c, api.h, api_msg.h, raw.h: Included patch #5938:
1985     changed raw_pcb.protocol from u16_t to u8_t since for IPv4 and IPv6, proto
1986     is only 8 bits wide. This affects the api, as there, the protocol was
1987     u16_t, too.
1988
1989   2007-05-18 Simon Goldschmidt
1990   * memp.c: addition to patch #5913: smaller pointer was returned but
1991     memp_memory was the same size -> did not save memory.
1992
1993   2007-05-16 Simon Goldschmidt
1994   * loopif.c, slipif.c: Fix bug #19729: free pbuf if netif->input() returns
1995     != ERR_OK.
1996
1997   2007-05-16 Simon Goldschmidt
1998   * api_msg.c, udp.c: If a udp_pcb has a local_ip set, check if it is the same
1999     as the one of the netif used for sending to prevent sending from old
2000     addresses after a netif address gets changed (partly fixes bug #3168).
2001
2002   2007-05-16 Frédéric Bernon
2003   * tcpip.c, igmp.h, igmp.c: Fixed bug "#19800 : IGMP: igmp_tick() will not work
2004     with NO_SYS=1". Note that igmp_init is always in tcpip_thread (and not in
2005     tcpip_init) because we have to be sure that network interfaces are already
2006     added (mac filter is updated only in igmp_init for the moment).
2007
2008   2007-05-16 Simon Goldschmidt
2009   * mem.c, memp.c: Removed semaphores from memp, changed sys_sem_wait calls
2010     into sys_arch_sem_wait calls to prevent timers from running while waiting
2011     for the heap. This fixes bug #19167.
2012
2013   2007-05-13 Simon Goldschmidt
2014   * tcp.h, sockets.h, sockets.c: Fixed bug from patch #5865 by moving the defines
2015     for socket options (lwip_set/-getsockopt) used with level IPPROTO_TCP from
2016     tcp.h to sockets.h.
2017
2018   2007-05-07 Simon Goldschmidt
2019   * mem.c: Another attempt to fix bug #17922.
2020
2021   2007-05-04 Simon Goldschmidt
2022   * pbuf.c, pbuf.h, etharp.c: Further update to ARP queueing: Changed pbuf_copy()
2023     implementation so that it can be reused (don't allocate the target
2024     pbuf inside pbuf_copy()).
2025
2026   2007-05-04 Simon Goldschmidt
2027   * memp.c: checked in patch #5913: in memp_malloc() we can return memp as mem
2028     to save a little RAM (next pointer of memp is not used while not in pool).
2029
2030   2007-05-03 "maq"
2031   * sockets.c: Fix ioctl FIONREAD when some data remains from last recv.
2032     (patch #3574).
2033
2034   2007-04-23 Simon Goldschmidt
2035   * loopif.c, loopif.h, opt.h, src/netif/FILES: fix bug #2595: "loopif results
2036     in NULL reference for incoming TCP packets". Loopif has to be configured
2037     (using LWIP_LOOPIF_MULTITHREADING) to directly call netif->input()
2038     (multithreading environments, e.g. netif->input() = tcpip_input()) or
2039     putting packets on a list that is fed to the stack by calling loopif_poll()
2040     (single-thread / NO_SYS / polling environment where e.g.
2041     netif->input() = ip_input).
2042
2043   2007-04-17 Jonathan Larmour
2044   * pbuf.c: Use s32_t in pbuf_realloc(), as an s16_t can't reliably hold
2045     the difference between two u16_t's.
2046   * sockets.h: FD_SETSIZE needs to match number of sockets, which is
2047     MEMP_NUM_NETCONN in sockets.c right now.
2048
2049   2007-04-12 Jonathan Larmour
2050   * icmp.c: Reset IP header TTL in ICMP ECHO responses (bug #19580).
2051
2052   2007-04-12 Kieran Mansley
2053   * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Modify way the retransmission
2054     timer is reset to fix bug#19434, with help from Oleg Tyshev.
2055
2056   2007-04-11 Simon Goldschmidt
2057   * etharp.c, pbuf.c, pbuf.h: 3rd fix for bug #11400 (arp-queuing): More pbufs than
2058     previously thought need to be copied (everything but PBUF_ROM!). Cleaned up
2059     pbuf.c: removed functions no needed any more (by etharp).
2060
2061   2007-04-11 Kieran Mansley
2062   * inet.c, ip_addr.h, sockets.h, sys.h, tcp.h: Apply patch #5745: Fix
2063     "Constant is long" warnings with 16bit compilers.  Contributed by
2064     avatar@mmlab.cse.yzu.edu.tw
2065
2066   2007-04-05 Frédéric Bernon, Jonathan Larmour
2067   * api_msg.c: Fix bug #16830: "err_tcp() posts to connection mailbox when no pend on
2068     the mailbox is active". Now, the post is only done during a connect, and do_send,
2069     do_write and do_join_leave_group don't do anything if a previous error was signaled.
2070
2071   2007-04-03 Frédéric Bernon
2072   * ip.c: Don't set the IP_DF ("Don't fragment") flag in the IP header in IP output
2073     packets. See patch #5834.
2074
2075   2007-03-30 Frédéric Bernon
2076   * api_msg.c: add a "pcb_new" helper function to avoid redundant code, and to add
2077     missing  pcb allocations checking (in do_bind, and for each raw_new). Fix style.
2078
2079   2007-03-30 Frédéric Bernon
2080   * most of files: prefix all debug.h define with "LWIP_" to avoid any conflict with
2081     others environment defines (these were too "generic").
2082
2083   2007-03-28 Frédéric Bernon
2084   * api.h, api_lib.c, sockets.c: netbuf_ref doesn't check its internal pbuf_alloc call
2085     result and can cause a crash. lwip_send now check netbuf_ref result.
2086
2087   2007-03-28 Simon Goldschmidt
2088   * sockets.c Remove "#include <errno.h>" from sockets.c to avoid multiple
2089     definition of macros (in errno.h and lwip/arch.h) if LWIP_PROVIDE_ERRNO is
2090     defined. This is the way it should have been already (looking at
2091     doc/sys_arch.txt)
2092
2093   2007-03-28 Kieran Mansley
2094   * opt.h Change default PBUF_POOL_BUFSIZE (again) to accomodate default MSS +
2095     IP and TCP headers *and* physical link headers
2096
2097   2007-03-26 Frédéric Bernon (based on patch from Dmitry Potapov)
2098   * api_lib.c: patch for netconn_write(), fixes a possible race condition which cause
2099     to send some garbage. It is not a definitive solution, but the patch does solve
2100     the problem for most cases.
2101
2102   2007-03-22 Frédéric Bernon
2103   * api_msg.h, api_msg.c: Remove obsolete API_MSG_ACCEPT and do_accept (never used).
2104
2105   2007-03-22 Frédéric Bernon
2106   * api_lib.c: somes resources couldn't be freed if there was errors during
2107     netconn_new_with_proto_and_callback.
2108
2109   2007-03-22 Frédéric Bernon
2110   * ethernetif.c: update netif->input calls to check return value. In older ports,
2111     it's a good idea to upgrade them, even if before, there could be another problem
2112     (access to an uninitialized mailbox).
2113
2114   2007-03-21 Simon Goldschmidt
2115   * sockets.c: fixed bug #5067 (essentialy a signed/unsigned warning fixed
2116     by casting to unsigned).
2117
2118   2007-03-21 Frédéric Bernon
2119   * api_lib.c, api_msg.c, tcpip.c: integrate sys_mbox_fetch(conn->mbox, NULL) calls from
2120     api_lib.c to tcpip.c's tcpip_apimsg(). Now, use a local variable and not a
2121     dynamic one from memp to send tcpip_msg to tcpip_thread in a synchrone call.
2122     Free tcpip_msg from tcpip_apimsg is not done in tcpip_thread. This give a
2123     faster and more reliable communication between api_lib and tcpip.
2124
2125   2007-03-21 Frédéric Bernon
2126   * opt.h: Add LWIP_NETIF_CALLBACK (to avoid compiler warning) and set it to 0.
2127
2128   2007-03-21 Frédéric Bernon
2129   * api_msg.c, igmp.c, igmp.h: Fix C++ style comments
2130
2131   2007-03-21 Kieran Mansley
2132   * opt.h Change default PBUF_POOL_BUFSIZE to accomodate default MSS +
2133     IP and TCP headers
2134
2135   2007-03-21 Kieran Mansley
2136   * Fix all uses of pbuf_header to check the return value.  In some
2137     cases just assert if it fails as I'm not sure how to fix them, but
2138     this is no worse than before when they would carry on regardless
2139     of the failure.
2140
2141   2007-03-21 Kieran Mansley
2142   * sockets.c, igmp.c, igmp.h, memp.h: Fix C++ style comments and
2143     comment out missing header include in icmp.c
2144
2145   2007-03-20 Frédéric Bernon
2146   * memp.h, stats.c: Fix stats_display function where memp_names table wasn't
2147     synchronized with memp.h.
2148
2149   2007-03-20 Frédéric Bernon
2150   * tcpip.c: Initialize tcpip's mbox, and verify if initialized in tcpip_input,
2151     tcpip_ethinput, tcpip_callback, tcpip_apimsg, to fix a init problem with
2152     network interfaces. Also fix a compiler warning.
2153
2154   2007-03-20 Kieran Mansley
2155   * udp.c: Only try and use pbuf_header() to make space for headers if
2156     not a ROM or REF pbuf.
2157
2158   2007-03-19 Frédéric Bernon
2159   * api_msg.h, api_msg.c, tcpip.h, tcpip.c: Add return types to tcpip_apimsg()
2160     and api_msg_post().
2161
2162   2007-03-19 Frédéric Bernon
2163   * Remove unimplemented "memp_realloc" function from memp.h.
2164
2165   2007-03-11 Simon Goldschmidt
2166   * pbuf.c: checked in patch #5796: pbuf_alloc: len field claculation caused
2167     memory corruption.
2168
2169   2007-03-11 Simon Goldschmidt (based on patch from Dmitry Potapov)
2170   * api_lib.c, sockets.c, api.h, api_msg.h, sockets.h: Fixed bug #19251
2171     (missing `const' qualifier in socket functions), to get more compatible to
2172     standard POSIX sockets.
2173
2174   2007-03-11 Frédéric Bernon (based on patch from Dmitry Potapov)
2175   * sockets.c: Add asserts inside bind, connect and sendto to check input
2176     parameters. Remove excessive set_errno() calls after get_socket(), because
2177     errno is set inside of get_socket(). Move last sock_set_errno() inside
2178     lwip_close.
2179
2180   2007-03-09 Simon Goldschmidt
2181   * memp.c: Fixed bug #11400: New etharp queueing introduced bug: memp_memory
2182     was allocated too small.
2183
2184   2007-03-06 Simon Goldschmidt
2185   * tcpip.c: Initialize dhcp timers in tcpip_thread (if LWIP_DHCP) to protect
2186     the stack from concurrent access.
2187
2188   2007-03-06 Frédéric Bernon, Dmitry Potapov
2189   * tcpip.c, ip_frag.c, ethernetif.c: Fix some build problems, and a redundancy
2190     call to "lwip_stats.link.recv++;" in low_level_input() & ethernetif_input().
2191
2192   2007-03-06 Simon Goldschmidt
2193   * ip_frag.c, ip_frag.h: Reduce code size: don't include code in those files
2194     if IP_FRAG == 0 and IP_REASSEMBLY == 0
2195
2196   2007-03-06 Frédéric Bernon, Simon Goldschmidt
2197   * opt.h, ip_frag.h, tcpip.h, tcpip.c, ethernetif.c: add new configuration
2198     option named ETHARP_TCPIP_ETHINPUT, which enable the new tcpip_ethinput.
2199     Allow to do ARP processing for incoming packets inside tcpip_thread
2200     (protecting ARP layer against concurrent access). You can also disable
2201     old code using tcp_input with new define ETHARP_TCPIP_INPUT set to 0.
2202     Older ports have to use tcpip_ethinput.
2203
2204   2007-03-06 Simon Goldschmidt (based on patch from Dmitry Potapov)
2205   * err.h, err.c: fixed compiler warning "initialization dircards qualifiers
2206     from pointer target type"
2207
2208   2007-03-05 Frédéric Bernon
2209   * opt.h, sockets.h: add new configuration options (LWIP_POSIX_SOCKETS_IO_NAMES,
2210     ETHARP_TRUST_IP_MAC, review SO_REUSE)
2211
2212   2007-03-04 Frédéric Bernon
2213   * api_msg.c: Remove some compiler warnings : parameter "pcb" was never
2214     referenced.
2215
2216   2007-03-04 Frédéric Bernon
2217   * api_lib.c: Fix "[patch #5764] api_lib.c cleanup: after patch #5687" (from
2218     Dmitry Potapov).
2219     The api_msg struct stay on the stack (not moved to netconn struct).
2220
2221   2007-03-04 Simon Goldschmidt (based on patch from Dmitry Potapov)
2222   * pbuf.c: Fix BUG#19168 - pbuf_free can cause deadlock (if
2223     SYS_LIGHTWEIGHT_PROT=1 & freeing PBUF_RAM when mem_sem is not available)
2224     Also fixed cast warning in pbuf_alloc()
2225
2226   2007-03-04 Simon Goldschmidt
2227   * etharp.c, etharp.h, memp.c, memp.h, opt.h: Fix BUG#11400 - don't corrupt
2228     existing pbuf chain when enqueuing multiple pbufs to a pending ARP request
2229
2230   2007-03-03 Frédéric Bernon
2231   * udp.c: remove obsolete line "static struct udp_pcb *pcb_cache = NULL;"
2232     It is static, and never used in udp.c except udp_init().
2233
2234   2007-03-02 Simon Goldschmidt
2235   * tcpip.c: Moved call to ip_init(), udp_init() and tcp_init() from
2236     tcpip_thread() to tcpip_init(). This way, raw API connections can be
2237     initialized before tcpip_thread is running (e.g. before OS is started)
2238
2239   2007-03-02 Frédéric Bernon
2240   * rawapi.txt: Fix documentation mismatch with etharp.h about etharp_tmr's call
2241     interval.
2242
2243   2007-02-28 Kieran Mansley
2244   * pbuf.c: Fix BUG#17645 - ensure pbuf payload pointer is not moved
2245     outside the region of the pbuf by pbuf_header()
2246
2247   2007-02-28 Kieran Mansley
2248   * sockets.c: Fix BUG#19161 - ensure milliseconds timeout is non-zero
2249     when supplied timeout is also non-zero
2250
2251 (STABLE-1.2.0)
2252
2253   2006-12-05 Leon Woestenberg
2254   * CHANGELOG: Mention STABLE-1.2.0 release.
2255
2256   ++ New features:
2257
2258   2006-12-01 Christiaan Simons
2259   * mem.h, opt.h: Added MEM_LIBC_MALLOC option.
2260     Note this is a workaround. Currently I have no other options left.
2261
2262   2006-10-26 Christiaan Simons (accepted patch by Jonathan Larmour)
2263   * ipv4/ip_frag.c: rename MAX_MTU to IP_FRAG_MAX_MTU and move define
2264     to include/lwip/opt.h.
2265   * ipv4/lwip/ip_frag.h: Remove unused IP_REASS_INTERVAL.
2266     Move IP_REASS_MAXAGE and IP_REASS_BUFSIZE to include/lwip/opt.h.
2267   * opt.h: Add above new options.
2268
2269   2006-08-18 Christiaan Simons
2270   * tcp_{in,out}.c: added SNMP counters.
2271   * ipv4/ip.c: added SNMP counters.
2272   * ipv4/ip_frag.c: added SNMP counters.
2273
2274   2006-08-08 Christiaan Simons
2275   * etharp.{c,h}: added etharp_find_addr() to read
2276     (stable) ethernet/IP address pair from ARP table
2277
2278   2006-07-14 Christiaan Simons
2279   * mib_structs.c: added
2280   * include/lwip/snmp_structs.h: added
2281   * netif.{c,h}, netif/ethernetif.c: added SNMP statistics to netif struct
2282
2283   2006-07-06 Christiaan Simons
2284   * snmp/asn1_{enc,dec}.c added
2285   * snmp/mib2.c added
2286   * snmp/msg_{in,out}.c added
2287   * include/lwip/snmp_asn1.h added
2288   * include/lwip/snmp_msg.h added
2289   * doc/snmp_agent.txt added
2290
2291   2006-03-29 Christiaan Simons
2292   * inet.c, inet.h: Added platform byteswap support.
2293     Added LWIP_PLATFORM_BYTESWAP define (defaults to 0) and
2294     optional LWIP_PLATFORM_HTONS(), LWIP_PLATFORM_HTONL() macros.
2295
2296   ++ Bug fixes:
2297
2298   2006-11-30 Christiaan Simons
2299   * dhcp.c: Fixed false triggers of request_timeout.
2300
2301   2006-11-28 Christiaan Simons
2302   * netif.c: In netif_add() fixed missing clear of ip_addr, netmask, gw and flags.
2303
2304   2006-10-11 Christiaan Simons
2305   * api_lib.c etharp.c, ip.c, memp.c, stats.c, sys.{c,h} tcp.h:
2306     Partially accepted patch #5449 for ANSI C compatibility / build fixes.
2307   * ipv4/lwip/ip.h ipv6/lwip/ip.h: Corrected UDP-Lite protocol
2308     identifier from 170 to 136 (bug #17574).
2309
2310   2006-10-10 Christiaan Simons
2311   * api_msg.c: Fixed Nagle algorithm as reported by Bob Grice.
2312
2313   2006-08-17 Christiaan Simons
2314   * udp.c: Fixed bug #17200, added check for broadcast
2315     destinations for PCBs bound to a unicast address.
2316
2317   2006-08-07 Christiaan Simons
2318   * api_msg.c: Flushing TCP output in do_close() (bug #15926).
2319
2320   2006-06-27 Christiaan Simons
2321   * api_msg.c: Applied patch for cold case (bug #11135).
2322     In accept_function() ensure newconn->callback is always initialized.
2323
2324   2006-06-15 Christiaan Simons
2325   * mem.h: added MEM_SIZE_F alias to fix an ancient cold case (bug #1748),
2326     facilitate printing of mem_size_t and u16_t statistics.
2327
2328   2006-06-14 Christiaan Simons
2329   * api_msg.c: Applied patch #5146 to handle allocation failures
2330     in accept() by Kevin Lawson.
2331
2332   2006-05-26 Christiaan Simons
2333   * api_lib.c: Removed conn->sem creation and destruction
2334     from netconn_write() and added sys_sem_new to netconn_new_*.
2335
2336 (STABLE-1_1_1)
2337
2338   2006-03-03  Christiaan Simons
2339   * ipv4/ip_frag.c: Added bound-checking assertions on ip_reassbitmap
2340     access and added pbuf_alloc() return value checks.
2341
2342   2006-01-01  Leon Woestenberg <leon.woestenberg@gmx.net>
2343   * tcp_{in,out}.c, tcp_out.c: Removed 'even sndbuf' fix in TCP, which is
2344     now handled by the checksum routine properly.
2345
2346   2006-02-27  Leon Woestenberg <leon.woestenberg@gmx.net>
2347    * pbuf.c: Fix alignment; pbuf_init() would not work unless
2348      pbuf_pool_memory[] was properly aligned. (Patch by Curt McDowell.)
2349
2350   2005-12-20  Leon Woestenberg <leon.woestenberg@gmx.net>
2351   * tcp.c: Remove PCBs which stay in LAST_ACK state too long. Patch
2352     submitted by Mitrani Hiroshi.
2353
2354   2005-12-15  Christiaan Simons
2355   * inet.c: Disabled the added summing routine to preserve code space.
2356
2357   2005-12-14  Leon Woestenberg <leon.woestenberg@gmx.net>
2358   * tcp_in.c: Duplicate FIN ACK race condition fix by Kelvin Lawson.
2359     Added Curt McDowell's optimized checksumming routine for future
2360     inclusion. Need to create test case for unaliged, aligned, odd,
2361     even length combination of cases on various endianess machines.
2362
2363   2005-12-09  Christiaan Simons
2364   * inet.c: Rewrote standard checksum routine in proper portable C.
2365
2366   2005-11-25  Christiaan Simons
2367   * udp.c tcp.c: Removed SO_REUSE hack. Should reside in socket code only.
2368   * *.c: introduced cc.h LWIP_DEBUG formatters matching the u16_t, s16_t,
2369     u32_t, s32_t typedefs. This solves most debug word-length assumes.
2370
2371   2005-07-17 Leon Woestenberg <leon.woestenberg@gmx.net>
2372   * inet.c: Fixed unaligned 16-bit access in the standard checksum
2373     routine by Peter Jolasson.
2374   * slipif.c: Fixed implementation assumption of single-pbuf datagrams.
2375
2376   2005-02-04 Leon Woestenberg <leon.woestenberg@gmx.net>
2377   * tcp_out.c: Fixed uninitialized 'queue' referenced in memerr branch.
2378   * tcp_{out|in}.c: Applied patch fixing unaligned access.
2379
2380   2005-01-04 Leon Woestenberg <leon.woestenberg@gmx.net>
2381   * pbuf.c: Fixed missing semicolon after LWIP_DEBUG statement.
2382
2383   2005-01-03 Leon Woestenberg <leon.woestenberg@gmx.net>
2384   * udp.c: UDP pcb->recv() was called even when it was NULL.
2385
2386 (STABLE-1_1_0)
2387
2388   2004-12-28 Leon Woestenberg <leon.woestenberg@gmx.net>
2389   * etharp.*: Disabled multiple packets on the ARP queue.
2390     This clashes with TCP queueing.
2391
2392   2004-11-28 Leon Woestenberg <leon.woestenberg@gmx.net>
2393   * etharp.*: Fixed race condition from ARP request to ARP timeout.
2394     Halved the ARP period, doubled the period counts.
2395     ETHARP_MAX_PENDING now should be at least 2. This prevents
2396     the counter from reaching 0 right away (which would allow
2397     too little time for ARP responses to be received).
2398
2399   2004-11-25 Leon Woestenberg <leon.woestenberg@gmx.net>
2400   * dhcp.c: Decline messages were not multicast but unicast.
2401   * etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD.
2402     Do not try hard to insert arbitrary packet's source address,
2403     etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD.
2404     etharp_query() now always DOES call ETHARP_TRY_HARD so that users
2405     querying an address will see it appear in the cache (DHCP could
2406     suffer from this when a server invalidly gave an in-use address.)
2407   * ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are
2408     comparing network addresses (identifiers), not the network masks
2409     themselves.
2410   * ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given
2411     IP address actually belongs to the network of the given interface.
2412
2413   2004-11-24 Kieran Mansley <kjm25@cam.ac.uk>
2414   * tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state.
2415
2416 (STABLE-1_1_0-RC1)
2417
2418   2004-10-16 Kieran Mansley <kjm25@cam.ac.uk>
2419   * tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately,
2420     even if one is already pending, if the rcv_wnd is above a threshold
2421     (currently TCP_WND/2). This avoids waiting for a timer to expire to send a
2422     delayed ACK in order to open the window if the stack is only receiving data.
2423
2424   2004-09-12 Kieran Mansley <kjm25@cam.ac.uk>
2425   * tcp*.*: Retransmit time-out handling improvement by Sam Jansen.
2426
2427   2004-08-20 Tony Mountifield <tony@softins.co.uk>
2428   * etharp.c: Make sure the first pbuf queued on an ARP entry
2429     is properly ref counted.
2430
2431   2004-07-27 Tony Mountifield <tony@softins.co.uk>
2432   * debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler
2433     warnings about comparison.
2434   * pbuf.c: Stopped compiler complaining of empty if statement
2435     when LWIP_DEBUGF() empty.  Closed an unclosed comment.
2436   * tcp.c: Stopped compiler complaining of empty if statement
2437     when LWIP_DEBUGF() empty.
2438   * ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons().
2439   * inet.c: Added a couple of casts to quiet the compiler.
2440     No need to test isascii(c) before isdigit(c) or isxdigit(c).
2441
2442   2004-07-22 Tony Mountifield <tony@softins.co.uk>
2443   * inet.c: Made data types consistent in inet_ntoa().
2444     Added casts for return values of checksum routines, to pacify compiler.
2445   * ip_frag.c, tcp_out.c, sockets.c, pbuf.c
2446     Small corrections to some debugging statements, to pacify compiler.
2447
2448   2004-07-21 Tony Mountifield <tony@softins.co.uk>
2449   * etharp.c: Removed spurious semicolon and added missing end-of-comment.
2450   * ethernetif.c Updated low_level_output() to match prototype for
2451     netif->linkoutput and changed low_level_input() similarly for consistency.
2452   * api_msg.c: Changed recv_raw() from int to u8_t, to match prototype
2453     of raw_recv() in raw.h and so avoid compiler error.
2454   * sockets.c: Added trivial (int) cast to keep compiler happier.
2455   * ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros.
2456
2457 (STABLE-1_0_0)
2458
2459   ++ Changes:
2460
2461   2004-07-05 Leon Woestenberg <leon.woestenberg@gmx.net>
2462   * sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure
2463     your cc.h file defines this either 1 or 0. If non-defined,
2464     defaults to 1.
2465   * .c: Added <string.h> and <errno.h> includes where used.
2466   * etharp.c: Made some array indices unsigned.
2467
2468   2004-06-27 Leon Woestenberg <leon.woestenberg@gmx.net>
2469   * netif.*: Added netif_set_up()/down().
2470   * dhcp.c: Changes to restart program flow.
2471
2472   2004-05-07 Leon Woestenberg <leon.woestenberg@gmx.net>
2473   * etharp.c: In find_entry(), instead of a list traversal per candidate, do a
2474     single-pass lookup for different candidates. Should exploit locality.
2475
2476   2004-04-29 Leon Woestenberg <leon.woestenberg@gmx.net>
2477   * tcp*.c: Cleaned up source comment documentation for Doxygen processing.
2478   * opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC.
2479   * etharp.c: update_arp_entry() only adds new ARP entries when adviced to by
2480     the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option.
2481
2482   ++ Bug fixes:
2483
2484   2004-04-27 Leon Woestenberg <leon.woestenberg@gmx.net>
2485   * etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution
2486     suggested by Timmy Brolin. Fix for 32-bit processors that cannot access
2487     non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix
2488     is to prefix the 14-bit Ethernet headers with two padding bytes.
2489
2490   2004-04-23 Leon Woestenberg <leon.woestenberg@gmx.net>
2491   * ip_addr.c: Fix in the ip_addr_isbroadcast() check.
2492   * etharp.c: Fixed the case where the packet that initiates the ARP request
2493     is not queued, and gets lost. Fixed the case where the packets destination
2494     address is already known; we now always queue the packet and perform an ARP
2495     request.
2496
2497 (STABLE-0_7_0)
2498
2499   ++ Bug fixes:
2500
2501   * Fixed TCP bug for SYN_SENT to ESTABLISHED state transition.
2502   * Fixed TCP bug in dequeueing of FIN from out of order segment queue.
2503   * Fixed two possible NULL references in rare cases.
2504
2505 (STABLE-0_6_6)
2506
2507   ++ Bug fixes:
2508
2509   * Fixed DHCP which did not include the IP address in DECLINE messages.
2510
2511   ++ Changes:
2512
2513   * etharp.c has been hauled over a bit.
2514
2515 (STABLE-0_6_5)
2516
2517   ++ Bug fixes:
2518
2519   * Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic.
2520   * Packets sent from ARP queue had invalid source hardware address.
2521
2522   ++ Changes:
2523
2524   * Pass-by ARP requests do now update the cache.
2525
2526   ++ New features:
2527
2528   * No longer dependent on ctype.h.
2529   * New socket options.
2530   * Raw IP pcb support.
2531
2532 (STABLE-0_6_4)
2533
2534   ++ Bug fixes:
2535
2536   * Some debug formatters and casts fixed.
2537   * Numereous fixes in PPP.
2538
2539   ++ Changes:
2540
2541   * DEBUGF now is LWIP_DEBUGF
2542   * pbuf_dechain() has been re-enabled.
2543   * Mentioned the changed use of CVS branches in README.
2544
2545 (STABLE-0_6_3)
2546
2547   ++ Bug fixes:
2548
2549   * Fixed pool pbuf memory leak in pbuf_alloc().
2550     Occured if not enough PBUF_POOL pbufs for a packet pbuf chain.
2551     Reported by Savin Zlobec.
2552
2553   * PBUF_POOL chains had their tot_len field not set for non-first
2554     pbufs. Fixed in pbuf_alloc().
2555
2556   ++ New features:
2557
2558   * Added PPP stack contributed by Marc Boucher
2559
2560   ++ Changes:
2561
2562   * Now drops short packets for ICMP/UDP/TCP protocols. More robust.
2563
2564   * ARP queueuing now queues the latest packet instead of the first.
2565     This is the RFC recommended behaviour, but can be overridden in
2566     lwipopts.h.
2567
2568 (0.6.2)
2569
2570   ++ Bugfixes:
2571
2572   * TCP has been fixed to deal with the new use of the pbuf->ref
2573     counter.
2574
2575   * DHCP dhcp_inform() crash bug fixed.
2576
2577   ++ Changes:
2578
2579   * Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed
2580     pbuf_refresh(). This has sped up pbuf pool operations considerably.
2581     Implemented by David Haas.
2582
2583 (0.6.1)
2584
2585   ++ New features:
2586
2587   * The packet buffer implementation has been enhanced to support
2588     zero-copy and copy-on-demand for packet buffers which have their
2589     payloads in application-managed memory.
2590     Implemented by David Haas.
2591
2592     Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy
2593     if an outgoing packet can be directly sent on the link, or perform
2594     a copy-on-demand when necessary.
2595
2596     The application can safely assume the packet is sent, and the RAM
2597     is available to the application directly after calling udp_send()
2598     or similar function.
2599
2600   ++ Bugfixes:
2601
2602   * ARP_QUEUEING should now correctly work for all cases, including
2603     PBUF_REF.
2604     Implemented by Leon Woestenberg.
2605
2606   ++ Changes:
2607
2608   * IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer
2609     to a '0.0.0.0' IP address.
2610
2611   * The packet buffer implementation is changed. The pbuf->ref counter
2612     meaning has changed, and several pbuf functions have been
2613     adapted accordingly.
2614
2615   * netif drivers have to be changed to set the hardware address length field
2616     that must be initialized correctly by the driver (hint: 6 for Ethernet MAC).
2617     See the contrib/ports/c16x cs8900 driver as a driver example.
2618
2619   * netif's have a dhcp field that must be initialized to NULL by the driver.
2620     See the contrib/ports/c16x cs8900 driver as a driver example.
2621
2622 (0.5.x) This file has been unmaintained up to 0.6.1. All changes are
2623   logged in CVS but have not been explained here.
2624
2625 (0.5.3) Changes since version 0.5.2
2626
2627   ++ Bugfixes:
2628
2629   * memp_malloc(MEMP_API_MSG) could fail with multiple application
2630     threads because it wasn't protected by semaphores.
2631
2632   ++ Other changes:
2633
2634   * struct ip_addr now packed.
2635
2636   * The name of the time variable in arp.c has been changed to ctime
2637     to avoid conflicts with the time() function.
2638
2639 (0.5.2) Changes since version 0.5.1
2640
2641   ++ New features:
2642
2643   * A new TCP function, tcp_tmr(), now handles both TCP timers.
2644
2645   ++ Bugfixes:
2646
2647   * A bug in tcp_parseopt() could cause the stack to hang because of a
2648     malformed TCP option.
2649
2650   * The address of new connections in the accept() function in the BSD
2651     socket library was not handled correctly.
2652
2653   * pbuf_dechain() did not update the ->tot_len field of the tail.
2654
2655   * Aborted TCP connections were not handled correctly in all
2656     situations.
2657
2658   ++ Other changes:
2659
2660   * All protocol header structs are now packed.
2661
2662   * The ->len field in the tcp_seg structure now counts the actual
2663     amount of data, and does not add one for SYN and FIN segments.
2664
2665 (0.5.1) Changes since version 0.5.0
2666
2667   ++ New features:
2668
2669   * Possible to run as a user process under Linux.
2670
2671   * Preliminary support for cross platform packed structs.
2672
2673   * ARP timer now implemented.
2674
2675   ++ Bugfixes:
2676
2677   * TCP output queue length was badly initialized when opening
2678     connections.
2679
2680   * TCP delayed ACKs were not sent correctly.
2681
2682   * Explicit initialization of BSS segment variables.
2683
2684   * read() in BSD socket library could drop data.
2685
2686   * Problems with memory alignment.
2687
2688   * Situations when all TCP buffers were used could lead to
2689     starvation.
2690
2691   * TCP MSS option wasn't parsed correctly.
2692
2693   * Problems with UDP checksum calculation.
2694
2695   * IP multicast address tests had endianess problems.
2696
2697   * ARP requests had wrong destination hardware address.
2698
2699   ++ Other changes:
2700
2701   * struct eth_addr changed from u16_t[3] array to u8_t[6].
2702
2703   * A ->linkoutput() member was added to struct netif.
2704
2705   * TCP and UDP ->dest_* struct members where changed to ->remote_*.
2706
2707   * ntoh* macros are now null definitions for big endian CPUs.
2708
2709 (0.5.0) Changes since version 0.4.2
2710
2711   ++ New features:
2712
2713   * Redesigned operating system emulation layer to make porting easier.
2714
2715   * Better control over TCP output buffers.
2716
2717   * Documenation added.
2718
2719   ++ Bugfixes:
2720
2721   * Locking issues in buffer management.
2722
2723   * Bugfixes in the sequential API.
2724
2725   * IP forwarding could cause memory leakage. This has been fixed.
2726
2727   ++ Other changes:
2728
2729   * Directory structure somewhat changed; the core/ tree has been
2730     collapsed.
2731
2732 (0.4.2) Changes since version 0.4.1
2733
2734   ++ New features:
2735
2736   * Experimental ARP implementation added.
2737
2738   * Skeleton Ethernet driver added.
2739
2740   * Experimental BSD socket API library added.
2741
2742   ++ Bugfixes:
2743
2744   * In very intense situations, memory leakage could occur. This has
2745     been fixed.
2746
2747   ++ Other changes:
2748
2749   * Variables named "data" and "code" have been renamed in order to
2750     avoid name conflicts in certain compilers.
2751
2752   * Variable++ have in appliciable cases been translated to ++variable
2753     since some compilers generate better code in the latter case.
2754
2755 (0.4.1) Changes since version 0.4
2756
2757   ++ New features:
2758
2759   * TCP: Connection attempts time out earlier than data
2760     transmissions. Nagle algorithm implemented. Push flag set on the
2761     last segment in a burst.
2762
2763   * UDP: experimental support for UDP-Lite extensions.
2764
2765   ++ Bugfixes:
2766
2767   * TCP: out of order segments were in some cases handled incorrectly,
2768     and this has now been fixed. Delayed acknowledgements was broken
2769     in 0.4, has now been fixed. Binding to an address that is in use
2770     now results in an error. Reset connections sometimes hung an
2771     application; this has been fixed.
2772
2773   * Checksum calculation sometimes failed for chained pbufs with odd
2774     lengths. This has been fixed.
2775
2776   * API: a lot of bug fixes in the API. The UDP API has been improved
2777     and tested. Error reporting and handling has been
2778     improved. Logical flaws and race conditions for incoming TCP
2779     connections has been found and removed.
2780
2781   * Memory manager: alignment issues. Reallocating memory sometimes
2782     failed, this has been fixed.
2783
2784   * Generic library: bcopy was flawed and has been fixed.
2785
2786   ++ Other changes:
2787
2788   * API: all datatypes has been changed from generic ones such as
2789     ints, to specified ones such as u16_t. Functions that return
2790     errors now have the correct type (err_t).
2791
2792   * General: A lot of code cleaned up and debugging code removed. Many
2793     portability issues have been fixed.
2794
2795   * The license was changed; the advertising clause was removed.
2796
2797   * C64 port added.
2798
2799   * Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri
2800     Kosunen, Mikael Caleres, and Frits Wilmink for reporting and
2801     fixing bugs!
2802
2803 (0.4) Changes since version 0.3.1
2804
2805   * Memory management has been radically changed; instead of
2806     allocating memory from a shared heap, memory for objects that are
2807     rapidly allocated and deallocated is now kept in pools. Allocation
2808     and deallocation from those memory pools is very fast. The shared
2809     heap is still present but is used less frequently.
2810
2811   * The memory, memory pool, and packet buffer subsystems now support
2812     4-, 2-, or 1-byte alignment.
2813
2814   * "Out of memory" situations are handled in a more robust way.
2815
2816   * Stack usage has been reduced.
2817
2818   * Easier configuration of lwIP parameters such as memory usage,
2819     TTLs, statistics gathering, etc. All configuration parameters are
2820     now kept in a single header file "lwipopts.h".
2821
2822   * The directory structure has been changed slightly so that all
2823     architecture specific files are kept under the src/arch
2824     hierarchy.
2825
2826   * Error propagation has been improved, both in the protocol modules
2827     and in the API.
2828
2829   * The code for the RTXC architecture has been implemented, tested
2830     and put to use.
2831
2832   * Bugs have been found and corrected in the TCP, UDP, IP, API, and
2833     the Internet checksum modules.
2834
2835   * Bugs related to porting between a 32-bit and a 16-bit architecture
2836     have been found and corrected.
2837
2838   * The license has been changed slightly to conform more with the
2839     original BSD license, including the advertisement clause.
2840
2841 (0.3.1) Changes since version 0.3
2842
2843   * Fix of a fatal bug in the buffer management. Pbufs with allocated
2844     RAM never returned the RAM when the pbuf was deallocated.
2845
2846   * TCP congestion control, window updates and retransmissions did not
2847     work correctly. This has now been fixed.
2848
2849   * Bugfixes in the API.
2850
2851 (0.3) Changes since version 0.2
2852
2853   * New and improved directory structure. All include files are now
2854     kept in a dedicated include/ directory.
2855
2856   * The API now has proper error handling. A new function,
2857     netconn_err(), now returns an error code for the connection in
2858     case of errors.
2859
2860   * Improvements in the memory management subsystem. The system now
2861     keeps a pointer to the lowest free memory block. A new function,
2862     mem_malloc2() tries to allocate memory once, and if it fails tries
2863     to free some memory and retry the allocation.
2864
2865   * Much testing has been done with limited memory
2866     configurations. lwIP now does a better job when overloaded.
2867
2868   * Some bugfixes and improvements to the buffer (pbuf) subsystem.
2869
2870   * Many bugfixes in the TCP code:
2871
2872     - Fixed a bug in tcp_close().
2873
2874     - The TCP receive window was incorrectly closed when out of
2875       sequence segments was received. This has been fixed.
2876
2877     - Connections are now timed-out of the FIN-WAIT-2 state.
2878
2879     - The initial congestion window could in some cases be too
2880       large. This has been fixed.
2881
2882     - The retransmission queue could in some cases be screwed up. This
2883       has been fixed.
2884
2885     - TCP RST flag now handled correctly.
2886
2887     - Out of sequence data was in some cases never delivered to the
2888       application. This has been fixed.
2889
2890     - Retransmitted segments now contain the correct acknowledgment
2891       number and advertised window.
2892
2893     - TCP retransmission timeout backoffs are not correctly computed
2894       (ala BSD). After a number of retransmissions, TCP now gives up
2895       the connection.
2896
2897   * TCP connections now are kept on three lists, one for active
2898     connections, one for listening connections, and one for
2899     connections that are in TIME-WAIT. This greatly speeds up the fast
2900     timeout processing for sending delayed ACKs.
2901
2902   * TCP now provides proper feedback to the application when a
2903     connection has been successfully set up.
2904
2905   * More comments have been added to the code. The code has also been
2906     somewhat cleaned up.
2907
2908 (0.2) Initial public release.