Travis Geiselbrecht | 1d0df69 | 2008-09-01 02:26:09 -0700 | [diff] [blame^] | 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 | * TODO: the ARP layer is not protected against concurrent access. If |
| 9 | you run from a multitasking OS, serialize access to ARP (called from |
| 10 | your network device driver and from a timeout thread.) |
| 11 | |
| 12 | * TODO: the PPP code is broken in a few ways. There are namespace |
| 13 | collisions on BSD systems and many assumptions on word-length |
| 14 | (sizeof(int)). In ppp.c an assumption is made on the availability of |
| 15 | a thread subsystem. Either PPP needs to be moved to contrib/ports/??? |
| 16 | or rearranged to be more generic. |
| 17 | |
| 18 | HISTORY |
| 19 | |
| 20 | (CVS HEAD) |
| 21 | |
| 22 | * [New changes go here] |
| 23 | |
| 24 | (STABLE-1_1_1) |
| 25 | |
| 26 | 2006-03-03 Christiaan Simons |
| 27 | * ipv4/ip_frag.c: Added bound-checking assertions on ip_reassbitmap |
| 28 | access and added pbuf_alloc() return value checks. |
| 29 | |
| 30 | 2006-01-01 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 31 | * tcp_{in,out}.c, tcp_out.c: Removed 'even sndbuf' fix in TCP, which is |
| 32 | now handled by the checksum routine properly. |
| 33 | |
| 34 | 2006-02-27 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 35 | * pbuf.c: Fix alignment; pbuf_init() would not work unless |
| 36 | pbuf_pool_memory[] was properly aligned. (Patch by Curt McDowell.) |
| 37 | |
| 38 | 2005-12-20 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 39 | * tcp.c: Remove PCBs which stay in LAST_ACK state too long. Patch |
| 40 | submitted by Mitrani Hiroshi. |
| 41 | |
| 42 | 2005-12-15 Christiaan Simons |
| 43 | * inet.c: Disabled the added summing routine to preserve code space. |
| 44 | |
| 45 | 2005-12-14 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 46 | * tcp_in.c: Duplicate FIN ACK race condition fix by Kelvin Lawson. |
| 47 | Added Curt McDowell's optimized checksumming routine for future |
| 48 | inclusion. Need to create test case for unaliged, aligned, odd, |
| 49 | even length combination of cases on various endianess machines. |
| 50 | |
| 51 | 2005-12-09 Christiaan Simons |
| 52 | * inet.c: Rewrote standard checksum routine in proper portable C. |
| 53 | |
| 54 | 2005-11-25 Christiaan Simons |
| 55 | * udp.c tcp.c: Removed SO_REUSE hack. Should reside in socket code only. |
| 56 | * *.c: introduced cc.h LWIP_DEBUG formatters matching the u16_t, s16_t, |
| 57 | u32_t, s32_t typedefs. This solves most debug word-length assumes. |
| 58 | |
| 59 | 2005-07-17 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 60 | * inet.c: Fixed unaligned 16-bit access in the standard checksum |
| 61 | routine by Peter Jolasson. |
| 62 | * slipif.c: Fixed implementation assumption of single-pbuf datagrams. |
| 63 | |
| 64 | 2005-02-04 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 65 | * tcp_out.c: Fixed uninitialized 'queue' referenced in memerr branch. |
| 66 | * tcp_{out|in}.c: Applied patch fixing unaligned access. |
| 67 | |
| 68 | 2005-01-04 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 69 | * pbuf.c: Fixed missing semicolon after LWIP_DEBUG statement. |
| 70 | |
| 71 | 2005-01-03 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 72 | * udp.c: UDP pcb->recv() was called even when it was NULL. |
| 73 | |
| 74 | (STABLE-1_1_0) |
| 75 | |
| 76 | 2004-12-28 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 77 | * etharp.*: Disabled multiple packets on the ARP queue. |
| 78 | This clashes with TCP queueing. |
| 79 | |
| 80 | 2004-11-28 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 81 | * etharp.*: Fixed race condition from ARP request to ARP timeout. |
| 82 | Halved the ARP period, doubled the period counts. |
| 83 | ETHARP_MAX_PENDING now should be at least 2. This prevents |
| 84 | the counter from reaching 0 right away (which would allow |
| 85 | too little time for ARP responses to be received). |
| 86 | |
| 87 | 2004-11-25 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 88 | * dhcp.c: Decline messages were not multicast but unicast. |
| 89 | * etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD. |
| 90 | Do not try hard to insert arbitrary packet's source address, |
| 91 | etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD. |
| 92 | etharp_query() now always DOES call ETHARP_TRY_HARD so that users |
| 93 | querying an address will see it appear in the cache (DHCP could |
| 94 | suffer from this when a server invalidly gave an in-use address.) |
| 95 | * ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are |
| 96 | comparing network addresses (identifiers), not the network masks |
| 97 | themselves. |
| 98 | * ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given |
| 99 | IP address actually belongs to the network of the given interface. |
| 100 | |
| 101 | 2004-11-24 Kieran Mansley <kjm25@cam.ac.uk> |
| 102 | * tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state. |
| 103 | |
| 104 | (STABLE-1_1_0-RC1) |
| 105 | |
| 106 | 2004-10-16 Kieran Mansley <kjm25@cam.ac.uk> |
| 107 | * tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately, |
| 108 | even if one is already pending, if the rcv_wnd is above a threshold |
| 109 | (currently TCP_WND/2). This avoids waiting for a timer to expire to send a |
| 110 | delayed ACK in order to open the window if the stack is only receiving data. |
| 111 | |
| 112 | 2004-09-12 Kieran Mansley <kjm25@cam.ac.uk> |
| 113 | * tcp*.*: Retransmit time-out handling improvement by Sam Jansen. |
| 114 | |
| 115 | 2004-08-20 Tony Mountifield <tony@softins.co.uk> |
| 116 | * etharp.c: Make sure the first pbuf queued on an ARP entry |
| 117 | is properly ref counted. |
| 118 | |
| 119 | 2004-07-27 Tony Mountifield <tony@softins.co.uk> |
| 120 | * debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler |
| 121 | warnings about comparison. |
| 122 | * pbuf.c: Stopped compiler complaining of empty if statement |
| 123 | when LWIP_DEBUGF() empty. Closed an unclosed comment. |
| 124 | * tcp.c: Stopped compiler complaining of empty if statement |
| 125 | when LWIP_DEBUGF() empty. |
| 126 | * ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons(). |
| 127 | * inet.c: Added a couple of casts to quiet the compiler. |
| 128 | No need to test isascii(c) before isdigit(c) or isxdigit(c). |
| 129 | |
| 130 | 2004-07-22 Tony Mountifield <tony@softins.co.uk> |
| 131 | * inet.c: Made data types consistent in inet_ntoa(). |
| 132 | Added casts for return values of checksum routines, to pacify compiler. |
| 133 | * ip_frag.c, tcp_out.c, sockets.c, pbuf.c |
| 134 | Small corrections to some debugging statements, to pacify compiler. |
| 135 | |
| 136 | 2004-07-21 Tony Mountifield <tony@softins.co.uk> |
| 137 | * etharp.c: Removed spurious semicolon and added missing end-of-comment. |
| 138 | * ethernetif.c Updated low_level_output() to match prototype for |
| 139 | netif->linkoutput and changed low_level_input() similarly for consistency. |
| 140 | * api_msg.c: Changed recv_raw() from int to u8_t, to match prototype |
| 141 | of raw_recv() in raw.h and so avoid compiler error. |
| 142 | * sockets.c: Added trivial (int) cast to keep compiler happier. |
| 143 | * ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros. |
| 144 | |
| 145 | (STABLE-1_0_0) |
| 146 | |
| 147 | ++ Changes: |
| 148 | |
| 149 | 2004-07-05 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 150 | * sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure |
| 151 | your cc.h file defines this either 1 or 0. If non-defined, |
| 152 | defaults to 1. |
| 153 | * .c: Added <string.h> and <errno.h> includes where used. |
| 154 | * etharp.c: Made some array indices unsigned. |
| 155 | |
| 156 | 2004-06-27 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 157 | * netif.*: Added netif_set_up()/down(). |
| 158 | * dhcp.c: Changes to restart program flow. |
| 159 | |
| 160 | 2004-05-07 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 161 | * etharp.c: In find_entry(), instead of a list traversal per candidate, do a |
| 162 | single-pass lookup for different candidates. Should exploit locality. |
| 163 | |
| 164 | 2004-04-29 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 165 | * tcp*.c: Cleaned up source comment documentation for Doxygen processing. |
| 166 | * opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC. |
| 167 | * etharp.c: update_arp_entry() only adds new ARP entries when adviced to by |
| 168 | the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option. |
| 169 | |
| 170 | ++ Bug fixes: |
| 171 | |
| 172 | 2004-04-27 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 173 | * etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution |
| 174 | suggested by Timmy Brolin. Fix for 32-bit processors that cannot access |
| 175 | non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix |
| 176 | is to prefix the 14-bit Ethernet headers with two padding bytes. |
| 177 | |
| 178 | 2004-04-23 Leon Woestenberg <leon.woestenberg@gmx.net> |
| 179 | * ip_addr.c: Fix in the ip_addr_isbroadcast() check. |
| 180 | * etharp.c: Fixed the case where the packet that initiates the ARP request |
| 181 | is not queued, and gets lost. Fixed the case where the packets destination |
| 182 | address is already known; we now always queue the packet and perform an ARP |
| 183 | request. |
| 184 | |
| 185 | (STABLE-0_7_0) |
| 186 | |
| 187 | ++ Bug fixes: |
| 188 | |
| 189 | * Fixed TCP bug for SYN_SENT to ESTABLISHED state transition. |
| 190 | * Fixed TCP bug in dequeueing of FIN from out of order segment queue. |
| 191 | * Fixed two possible NULL references in rare cases. |
| 192 | |
| 193 | (STABLE-0_6_6) |
| 194 | |
| 195 | ++ Bug fixes: |
| 196 | |
| 197 | * Fixed DHCP which did not include the IP address in DECLINE messages. |
| 198 | |
| 199 | ++ Changes: |
| 200 | |
| 201 | * etharp.c has been hauled over a bit. |
| 202 | |
| 203 | (STABLE-0_6_5) |
| 204 | |
| 205 | ++ Bug fixes: |
| 206 | |
| 207 | * Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic. |
| 208 | * Packets sent from ARP queue had invalid source hardware address. |
| 209 | |
| 210 | ++ Changes: |
| 211 | |
| 212 | * Pass-by ARP requests do now update the cache. |
| 213 | |
| 214 | ++ New features: |
| 215 | |
| 216 | * No longer dependent on ctype.h. |
| 217 | * New socket options. |
| 218 | * Raw IP pcb support. |
| 219 | |
| 220 | (STABLE-0_6_4) |
| 221 | |
| 222 | ++ Bug fixes: |
| 223 | |
| 224 | * Some debug formatters and casts fixed. |
| 225 | * Numereous fixes in PPP. |
| 226 | |
| 227 | ++ Changes: |
| 228 | |
| 229 | * DEBUGF now is LWIP_DEBUGF |
| 230 | * pbuf_dechain() has been re-enabled. |
| 231 | * Mentioned the changed use of CVS branches in README. |
| 232 | |
| 233 | (STABLE-0_6_3) |
| 234 | |
| 235 | ++ Bug fixes: |
| 236 | |
| 237 | * Fixed pool pbuf memory leak in pbuf_alloc(). |
| 238 | Occured if not enough PBUF_POOL pbufs for a packet pbuf chain. |
| 239 | Reported by Savin Zlobec. |
| 240 | |
| 241 | * PBUF_POOL chains had their tot_len field not set for non-first |
| 242 | pbufs. Fixed in pbuf_alloc(). |
| 243 | |
| 244 | ++ New features: |
| 245 | |
| 246 | * Added PPP stack contributed by Marc Boucher |
| 247 | |
| 248 | ++ Changes: |
| 249 | |
| 250 | * Now drops short packets for ICMP/UDP/TCP protocols. More robust. |
| 251 | |
| 252 | * ARP queueuing now queues the latest packet instead of the first. |
| 253 | This is the RFC recommended behaviour, but can be overridden in |
| 254 | lwipopts.h. |
| 255 | |
| 256 | (0.6.2) |
| 257 | |
| 258 | ++ Bugfixes: |
| 259 | |
| 260 | * TCP has been fixed to deal with the new use of the pbuf->ref |
| 261 | counter. |
| 262 | |
| 263 | * DHCP dhcp_inform() crash bug fixed. |
| 264 | |
| 265 | ++ Changes: |
| 266 | |
| 267 | * Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed |
| 268 | pbuf_refresh(). This has sped up pbuf pool operations considerably. |
| 269 | Implemented by David Haas. |
| 270 | |
| 271 | (0.6.1) |
| 272 | |
| 273 | ++ New features: |
| 274 | |
| 275 | * The packet buffer implementation has been enhanced to support |
| 276 | zero-copy and copy-on-demand for packet buffers which have their |
| 277 | payloads in application-managed memory. |
| 278 | Implemented by David Haas. |
| 279 | |
| 280 | Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy |
| 281 | if an outgoing packet can be directly sent on the link, or perform |
| 282 | a copy-on-demand when necessary. |
| 283 | |
| 284 | The application can safely assume the packet is sent, and the RAM |
| 285 | is available to the application directly after calling udp_send() |
| 286 | or similar function. |
| 287 | |
| 288 | ++ Bugfixes: |
| 289 | |
| 290 | * ARP_QUEUEING should now correctly work for all cases, including |
| 291 | PBUF_REF. |
| 292 | Implemented by Leon Woestenberg. |
| 293 | |
| 294 | ++ Changes: |
| 295 | |
| 296 | * IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer |
| 297 | to a '0.0.0.0' IP address. |
| 298 | |
| 299 | * The packet buffer implementation is changed. The pbuf->ref counter |
| 300 | meaning has changed, and several pbuf functions have been |
| 301 | adapted accordingly. |
| 302 | |
| 303 | * netif drivers have to be changed to set the hardware address length field |
| 304 | that must be initialized correctly by the driver (hint: 6 for Ethernet MAC). |
| 305 | See the contrib/ports/c16x cs8900 driver as a driver example. |
| 306 | |
| 307 | * netif's have a dhcp field that must be initialized to NULL by the driver. |
| 308 | See the contrib/ports/c16x cs8900 driver as a driver example. |
| 309 | |
| 310 | (0.5.x) This file has been unmaintained up to 0.6.1. All changes are |
| 311 | logged in CVS but have not been explained here. |
| 312 | |
| 313 | (0.5.3) Changes since version 0.5.2 |
| 314 | |
| 315 | ++ Bugfixes: |
| 316 | |
| 317 | * memp_malloc(MEMP_API_MSG) could fail with multiple application |
| 318 | threads because it wasn't protected by semaphores. |
| 319 | |
| 320 | ++ Other changes: |
| 321 | |
| 322 | * struct ip_addr now packed. |
| 323 | |
| 324 | * The name of the time variable in arp.c has been changed to ctime |
| 325 | to avoid conflicts with the time() function. |
| 326 | |
| 327 | (0.5.2) Changes since version 0.5.1 |
| 328 | |
| 329 | ++ New features: |
| 330 | |
| 331 | * A new TCP function, tcp_tmr(), now handles both TCP timers. |
| 332 | |
| 333 | ++ Bugfixes: |
| 334 | |
| 335 | * A bug in tcp_parseopt() could cause the stack to hang because of a |
| 336 | malformed TCP option. |
| 337 | |
| 338 | * The address of new connections in the accept() function in the BSD |
| 339 | socket library was not handled correctly. |
| 340 | |
| 341 | * pbuf_dechain() did not update the ->tot_len field of the tail. |
| 342 | |
| 343 | * Aborted TCP connections were not handled correctly in all |
| 344 | situations. |
| 345 | |
| 346 | ++ Other changes: |
| 347 | |
| 348 | * All protocol header structs are now packed. |
| 349 | |
| 350 | * The ->len field in the tcp_seg structure now counts the actual |
| 351 | amount of data, and does not add one for SYN and FIN segments. |
| 352 | |
| 353 | (0.5.1) Changes since version 0.5.0 |
| 354 | |
| 355 | ++ New features: |
| 356 | |
| 357 | * Possible to run as a user process under Linux. |
| 358 | |
| 359 | * Preliminary support for cross platform packed structs. |
| 360 | |
| 361 | * ARP timer now implemented. |
| 362 | |
| 363 | ++ Bugfixes: |
| 364 | |
| 365 | * TCP output queue length was badly initialized when opening |
| 366 | connections. |
| 367 | |
| 368 | * TCP delayed ACKs were not sent correctly. |
| 369 | |
| 370 | * Explicit initialization of BSS segment variables. |
| 371 | |
| 372 | * read() in BSD socket library could drop data. |
| 373 | |
| 374 | * Problems with memory alignment. |
| 375 | |
| 376 | * Situations when all TCP buffers were used could lead to |
| 377 | starvation. |
| 378 | |
| 379 | * TCP MSS option wasn't parsed correctly. |
| 380 | |
| 381 | * Problems with UDP checksum calculation. |
| 382 | |
| 383 | * IP multicast address tests had endianess problems. |
| 384 | |
| 385 | * ARP requests had wrong destination hardware address. |
| 386 | |
| 387 | ++ Other changes: |
| 388 | |
| 389 | * struct eth_addr changed from u16_t[3] array to u8_t[6]. |
| 390 | |
| 391 | * A ->linkoutput() member was added to struct netif. |
| 392 | |
| 393 | * TCP and UDP ->dest_* struct members where changed to ->remote_*. |
| 394 | |
| 395 | * ntoh* macros are now null definitions for big endian CPUs. |
| 396 | |
| 397 | (0.5.0) Changes since version 0.4.2 |
| 398 | |
| 399 | ++ New features: |
| 400 | |
| 401 | * Redesigned operating system emulation layer to make porting easier. |
| 402 | |
| 403 | * Better control over TCP output buffers. |
| 404 | |
| 405 | * Documenation added. |
| 406 | |
| 407 | ++ Bugfixes: |
| 408 | |
| 409 | * Locking issues in buffer management. |
| 410 | |
| 411 | * Bugfixes in the sequential API. |
| 412 | |
| 413 | * IP forwarding could cause memory leakage. This has been fixed. |
| 414 | |
| 415 | ++ Other changes: |
| 416 | |
| 417 | * Directory structure somewhat changed; the core/ tree has been |
| 418 | collapsed. |
| 419 | |
| 420 | (0.4.2) Changes since version 0.4.1 |
| 421 | |
| 422 | ++ New features: |
| 423 | |
| 424 | * Experimental ARP implementation added. |
| 425 | |
| 426 | * Skeleton Ethernet driver added. |
| 427 | |
| 428 | * Experimental BSD socket API library added. |
| 429 | |
| 430 | ++ Bugfixes: |
| 431 | |
| 432 | * In very intense situations, memory leakage could occur. This has |
| 433 | been fixed. |
| 434 | |
| 435 | ++ Other changes: |
| 436 | |
| 437 | * Variables named "data" and "code" have been renamed in order to |
| 438 | avoid name conflicts in certain compilers. |
| 439 | |
| 440 | * Variable++ have in appliciable cases been translated to ++variable |
| 441 | since some compilers generate better code in the latter case. |
| 442 | |
| 443 | (0.4.1) Changes since version 0.4 |
| 444 | |
| 445 | ++ New features: |
| 446 | |
| 447 | * TCP: Connection attempts time out earlier than data |
| 448 | transmissions. Nagle algorithm implemented. Push flag set on the |
| 449 | last segment in a burst. |
| 450 | |
| 451 | * UDP: experimental support for UDP-Lite extensions. |
| 452 | |
| 453 | ++ Bugfixes: |
| 454 | |
| 455 | * TCP: out of order segments were in some cases handled incorrectly, |
| 456 | and this has now been fixed. Delayed acknowledgements was broken |
| 457 | in 0.4, has now been fixed. Binding to an address that is in use |
| 458 | now results in an error. Reset connections sometimes hung an |
| 459 | application; this has been fixed. |
| 460 | |
| 461 | * Checksum calculation sometimes failed for chained pbufs with odd |
| 462 | lengths. This has been fixed. |
| 463 | |
| 464 | * API: a lot of bug fixes in the API. The UDP API has been improved |
| 465 | and tested. Error reporting and handling has been |
| 466 | improved. Logical flaws and race conditions for incoming TCP |
| 467 | connections has been found and removed. |
| 468 | |
| 469 | * Memory manager: alignment issues. Reallocating memory sometimes |
| 470 | failed, this has been fixed. |
| 471 | |
| 472 | * Generic library: bcopy was flawed and has been fixed. |
| 473 | |
| 474 | ++ Other changes: |
| 475 | |
| 476 | * API: all datatypes has been changed from generic ones such as |
| 477 | ints, to specified ones such as u16_t. Functions that return |
| 478 | errors now have the correct type (err_t). |
| 479 | |
| 480 | * General: A lot of code cleaned up and debugging code removed. Many |
| 481 | portability issues have been fixed. |
| 482 | |
| 483 | * The license was changed; the advertising clause was removed. |
| 484 | |
| 485 | * C64 port added. |
| 486 | |
| 487 | * Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri |
| 488 | Kosunen, Mikael Caleres, and Frits Wilmink for reporting and |
| 489 | fixing bugs! |
| 490 | |
| 491 | (0.4) Changes since version 0.3.1 |
| 492 | |
| 493 | * Memory management has been radically changed; instead of |
| 494 | allocating memory from a shared heap, memory for objects that are |
| 495 | rapidly allocated and deallocated is now kept in pools. Allocation |
| 496 | and deallocation from those memory pools is very fast. The shared |
| 497 | heap is still present but is used less frequently. |
| 498 | |
| 499 | * The memory, memory pool, and packet buffer subsystems now support |
| 500 | 4-, 2-, or 1-byte alignment. |
| 501 | |
| 502 | * "Out of memory" situations are handled in a more robust way. |
| 503 | |
| 504 | * Stack usage has been reduced. |
| 505 | |
| 506 | * Easier configuration of lwIP parameters such as memory usage, |
| 507 | TTLs, statistics gathering, etc. All configuration parameters are |
| 508 | now kept in a single header file "lwipopts.h". |
| 509 | |
| 510 | * The directory structure has been changed slightly so that all |
| 511 | architecture specific files are kept under the src/arch |
| 512 | hierarchy. |
| 513 | |
| 514 | * Error propagation has been improved, both in the protocol modules |
| 515 | and in the API. |
| 516 | |
| 517 | * The code for the RTXC architecture has been implemented, tested |
| 518 | and put to use. |
| 519 | |
| 520 | * Bugs have been found and corrected in the TCP, UDP, IP, API, and |
| 521 | the Internet checksum modules. |
| 522 | |
| 523 | * Bugs related to porting between a 32-bit and a 16-bit architecture |
| 524 | have been found and corrected. |
| 525 | |
| 526 | * The license has been changed slightly to conform more with the |
| 527 | original BSD license, including the advertisement clause. |
| 528 | |
| 529 | (0.3.1) Changes since version 0.3 |
| 530 | |
| 531 | * Fix of a fatal bug in the buffer management. Pbufs with allocated |
| 532 | RAM never returned the RAM when the pbuf was deallocated. |
| 533 | |
| 534 | * TCP congestion control, window updates and retransmissions did not |
| 535 | work correctly. This has now been fixed. |
| 536 | |
| 537 | * Bugfixes in the API. |
| 538 | |
| 539 | (0.3) Changes since version 0.2 |
| 540 | |
| 541 | * New and improved directory structure. All include files are now |
| 542 | kept in a dedicated include/ directory. |
| 543 | |
| 544 | * The API now has proper error handling. A new function, |
| 545 | netconn_err(), now returns an error code for the connection in |
| 546 | case of errors. |
| 547 | |
| 548 | * Improvements in the memory management subsystem. The system now |
| 549 | keeps a pointer to the lowest free memory block. A new function, |
| 550 | mem_malloc2() tries to allocate memory once, and if it fails tries |
| 551 | to free some memory and retry the allocation. |
| 552 | |
| 553 | * Much testing has been done with limited memory |
| 554 | configurations. lwIP now does a better job when overloaded. |
| 555 | |
| 556 | * Some bugfixes and improvements to the buffer (pbuf) subsystem. |
| 557 | |
| 558 | * Many bugfixes in the TCP code: |
| 559 | |
| 560 | - Fixed a bug in tcp_close(). |
| 561 | |
| 562 | - The TCP receive window was incorrectly closed when out of |
| 563 | sequence segments was received. This has been fixed. |
| 564 | |
| 565 | - Connections are now timed-out of the FIN-WAIT-2 state. |
| 566 | |
| 567 | - The initial congestion window could in some cases be too |
| 568 | large. This has been fixed. |
| 569 | |
| 570 | - The retransmission queue could in some cases be screwed up. This |
| 571 | has been fixed. |
| 572 | |
| 573 | - TCP RST flag now handled correctly. |
| 574 | |
| 575 | - Out of sequence data was in some cases never delivered to the |
| 576 | application. This has been fixed. |
| 577 | |
| 578 | - Retransmitted segments now contain the correct acknowledgment |
| 579 | number and advertised window. |
| 580 | |
| 581 | - TCP retransmission timeout backoffs are not correctly computed |
| 582 | (ala BSD). After a number of retransmissions, TCP now gives up |
| 583 | the connection. |
| 584 | |
| 585 | * TCP connections now are kept on three lists, one for active |
| 586 | connections, one for listening connections, and one for |
| 587 | connections that are in TIME-WAIT. This greatly speeds up the fast |
| 588 | timeout processing for sending delayed ACKs. |
| 589 | |
| 590 | * TCP now provides proper feedback to the application when a |
| 591 | connection has been successfully set up. |
| 592 | |
| 593 | * More comments have been added to the code. The code has also been |
| 594 | somewhat cleaned up. |
| 595 | |
| 596 | (0.2) Initial public release. |