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.
8 * TODO: the PPP code is broken in a few ways. There are namespace
9 collisions on BSD systems and many assumptions on word-length
10 (sizeof(int)). In ppp.c an assumption is made on the availability of
11 a thread subsystem. Either PPP needs to be moved to contrib/ports/???
12 or rearranged to be more generic.
18 * [Enter new changes just after this line - do not remove this line]
22 2008-01-05 Frédéric Bernon
23 * sys_arch.txt, api.h, api_lib.c, api_msg.h, api_msg.c, tcpip.c, sys.h, opt.h:
24 Introduce changes for task #7490 "Add return value to sys_mbox_post" with some
25 modifications in the sys_mbox api: sys_mbox_new take a "size" parameters which
26 indicate the number of pointers query by the mailbox. There is three defines
27 in opt.h to indicate sizes for tcpip::mbox, netconn::recvmbox, and for the
28 netconn::acceptmbox. Port maintainers, you can decide to just add this new
29 parameter in your implementation, but to ignore it to keep the previous behavior.
30 The new sys_mbox_trypost function return a value to know if the mailbox is
31 full or if the message is posted. Take a look to sys_arch.txt for more details.
32 This new function is used in tcpip_input (so, can be called in an interrupt
33 context since the function is not blocking), and in recv_udp and recv_raw.
35 2008-01-04 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
36 * rawapi.txt, api.h, api_lib.c, api_msg.h, api_msg.c, sockets.c, tcp.h, tcp.c,
37 tcp_in.c, init.c, opt.h: rename backlog options with TCP_ prefix, limit the
38 "backlog" parameter in an u8_t, 0 is interpreted as "smallest queue", add
39 documentation in the rawapi.txt file.
41 2007-12-31 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
42 * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Add TCP persist timer
44 2007-12-31 Frédéric Bernon, Luca Ceresoli
45 * autoip.c, etharp.c: ip_addr.h: Integrate patch #6348: "Broadcast ARP packets
46 in autoip". The change in etharp_raw could be removed, since all calls to
47 etharp_raw use ethbroadcast for the "ethdst_addr" parameter. But it could be
50 2007-12-30 Frédéric Bernon, Tom Evans
51 * ip.c: Fix bug #21846 "LwIP doesn't appear to perform any IP Source Address
52 Filtering" reported by Tom Evans.
54 2007-12-21 Frédéric Bernon, Simon Goldschmidt, Jonathan Larmour
55 * tcp.h, opt.h, api.h, api_msg.h, tcp.c, tcp_in.c, api_lib.c, api_msg.c,
56 sockets.c, init.c: task #7252: Implement TCP listen backlog: Warning: raw API
57 applications have to call 'tcp_accepted(pcb)' in their accept callback to
58 keep accepting new connections.
60 2007-12-13 Frédéric Bernon
61 * api_msg.c, err.h, err.c, sockets.c, dns.c, dns.h: replace "enum dns_result"
62 by err_t type. Add a new err_t code "ERR_INPROGRESS".
64 2007-12-12 Frédéric Bernon
65 * dns.h, dns.c, opt.h: move DNS options to the "right" place. Most visibles
66 are the one which have ram usage.
68 2007-12-05 Frédéric Bernon
69 * netdb.c: add a LWIP_DNS_API_HOSTENT_STORAGE option to decide to use a static
70 set of variables (=0) or a local one (=1). In this last case, your port should
71 provide a function "struct hostent* sys_thread_hostent( struct hostent* h)"
72 which have to do a copy of "h" and return a pointer ont the "per-thread" copy.
74 2007-12-03 Simon Goldschmidt
75 * ip.c: ip_input: check if a packet is for inp first before checking all other
76 netifs on netif_list (speeds up packet receiving in most cases)
78 2007-11-30 Simon Goldschmidt
79 * udp.c, raw.c: task #7497: Sort lists (pcb, netif, ...) for faster access
80 UDP: move a (connected) pcb selected for input to the front of the list of
81 pcbs so that it is found faster next time. Same for RAW pcbs that have eaten
84 2007-11-28 Simon Goldschmidt
85 * etharp.c, stats.c, stats.h, opt.h: Introduced ETHARP_STATS
87 2007-11-25 Simon Goldschmidt
88 * dhcp.c: dhcp_unfold_reply() uses pbuf_copy_partial instead of its own copy
91 2007-11-24 Simon Goldschmidt
92 * netdb.h, netdb.c, sockets.h/.c: Moved lwip_gethostbyname from sockets.c
93 to the new file netdb.c; included lwip_getaddrinfo.
95 2007-11-21 Simon Goldschmidt
96 * tcp.h, opt.h, tcp.c, tcp_in.c: implemented calculating the effective send-mss
97 based on the MTU of the netif used to send. Enabled by default. Disable by
98 setting LWIP_CALCULATE_EFF_SEND_MSS to 0. This fixes bug #21535.
100 2007-11-19 Frédéric Bernon
101 * api_msg.c, dns.h, dns.c: Implement DNS_DOES_NAME_CHECK option (check if name
102 received match the name query), implement DNS_USES_STATIC_BUF (the place where
103 copy dns payload to parse the response), return an error if there is no place
104 for a new query, and fix some minor problems.
106 2007-11-16 Simon Goldschmidt
107 * new files: ipv4/inet.c, ipv4/inet_chksum.c, ipv6/inet6.c
108 removed files: core/inet.c, core/inet6.c
109 Moved inet files into ipv4/ipv6 directory; splitted inet.c/inet.h into
110 inet and chksum part; changed includes in all lwIP files as appropriate
112 2007-11-16 Simon Goldschmidt
113 * api.h, api_msg.h, api_lib.c, api_msg.c, socket.h, socket.c: Added sequential
114 dns resolver function for netconn api (netconn_gethostbyname) and socket api
115 (gethostbyname/gethostbyname_r).
117 2007-11-15 Jim Pettinato, Frédéric Bernon
118 * opt.h, init.c, tcpip.c, dhcp.c, dns.h, dns.c: add DNS client for simple name
119 requests with RAW api interface. Initialization is done in lwip_init() with
120 build time options. DNS timer is added in tcpip_thread context. DHCP can set
121 DNS server ip addresses when options are received. You need to set LWIP_DNS=1
122 in your lwipopts.h file (LWIP_DNS=0 in opt.h). DNS_DEBUG can be set to get
123 some traces with LWIP_DEBUGF. Sanity check have been added. There is a "todo"
124 list with points to improve.
126 2007-11-06 Simon Goldschmidt
127 * opt.h, mib2.c: Patch #6215: added ifAdminStatus write support (if explicitly
128 enabled by defining SNMP_SAFE_REQUESTS to 0); added code to check link status
129 for ifOperStatus if LWIP_NETIF_LINK_CALLBACK is defined.
131 2007-11-06 Simon Goldschmidt
132 * api.h, api_msg.h and dependent files: Task #7410: Removed the need to include
133 core header files in api.h (ip/tcp/udp/raw.h) to hide the internal
134 implementation from netconn api applications.
136 2007-11-03 Frédéric Bernon
137 * api.h, api_lib.c, api_msg.c, sockets.c, opt.h: add SO_RCVBUF option for UDP &
138 RAW netconn. You need to set LWIP_SO_RCVBUF=1 in your lwipopts.h (it's disabled
139 by default). Netconn API users can use the netconn_recv_bufsize macro to access
140 it. This is a first release which have to be improve for TCP. Note it used the
141 netconn::recv_avail which need to be more "thread-safe" (note there is already
142 the problem for FIONREAD with lwip_ioctl/ioctlsocket).
144 2007-11-01 Frédéric Bernon, Marc Chaland
145 * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, tcp.h, tcp_out.c:
146 Integrate "patch #6250 : MSG_MORE flag for send". MSG_MORE is used at socket api
147 layer, NETCONN_MORE at netconn api layer, and TCP_WRITE_FLAG_MORE at raw api
148 layer. This option enable to delayed TCP PUSH flag on multiple "write" calls.
149 Note that previous "copy" parameter for "write" APIs is now called "apiflags".
151 2007-10-24 Frédéric Bernon
152 * api.h, api_lib.c, api_msg.c: Add macro API_EVENT in the same spirit than
153 TCP_EVENT_xxx macros to get a code more readable. It could also help to remove
154 some code (like we have talk in "patch #5919 : Create compile switch to remove
155 select code"), but it could be done later.
157 2007-10-08 Simon Goldschmidt
158 * many files: Changed initialization: many init functions are not needed any
159 more since we now rely on the compiler initializing global and static
162 2007-10-06 Simon Goldschmidt
163 * ip_frag.c, memp.c, mib2.c, ip_frag.h, memp_std.h, opt.h: Changed IP_REASSEMBLY
164 to enqueue the received pbufs so that multiple packets can be reassembled
165 simultaneously and no static reassembly buffer is needed.
167 2007-10-05 Simon Goldschmidt
168 * tcpip.c, etharp.h, etharp.c: moved ethernet_input from tcpip.c to etharp.c so
169 all netifs (or ports) can use it.
171 2007-10-05 Frédéric Bernon
172 * netifapi.h, netifapi.c: add function netifapi_netif_set_default. Change the
173 common function to reduce a little bit the footprint (for all functions using
174 only the "netif" parameter).
176 2007-10-03 Frédéric Bernon
177 * netifapi.h, netifapi.c: add functions netifapi_netif_set_up, netifapi_netif_set_down,
178 netifapi_autoip_start and netifapi_autoip_stop. Use a common function to reduce
179 a little bit the footprint (for all functions using only the "netif" parameter).
181 2007-09-15 Frédéric Bernon
182 * udp.h, udp.c, sockets.c: Changes for "#20503 IGMP Improvement". Add IP_MULTICAST_IF
183 option in socket API, and a new field "multicast_ip" in "struct udp_pcb" (for
184 netconn and raw API users), only if LWIP_IGMP=1. Add getsockopt processing for
185 IP_MULTICAST_TTL and IP_MULTICAST_IF.
187 2007-09-10 Frédéric Bernon
188 * snmp.h, mib2.c: enable to remove SNMP timer (which consumne several cycles
189 even when it's not necessary). snmp_agent.txt tell to call snmp_inc_sysuptime()
190 each 10ms (but, it's intrusive if you use sys_timeout feature). Now, you can
191 decide to call snmp_add_sysuptime(100) each 1000ms (which is bigger "step", but
192 call to a lower frequency). Or, you can decide to not call snmp_inc_sysuptime()
193 or snmp_add_sysuptime(), and to define the SNMP_GET_SYSUPTIME(sysuptime) macro.
194 This one is undefined by default in mib2.c. SNMP_GET_SYSUPTIME is called inside
195 snmp_get_sysuptime(u32_t *value), and enable to change "sysuptime" value only
196 when it's queried (any direct call to "sysuptime" is changed by a call to
199 2007-09-09 Frédéric Bernon, Bill Florac
200 * igmp.h, igmp.c, netif.h, netif.c, ip.c: To enable to have interfaces with IGMP,
201 and others without it, there is a new NETIF_FLAG_IGMP flag to set in netif->flags
202 if you want IGMP on an interface. igmp_stop() is now called inside netif_remove().
203 igmp_report_groups() is now called inside netif_set_link_up() (need to have
204 LWIP_NETIF_LINK_CALLBACK=1) to resend reports once the link is up (avoid to wait
205 the next query message to receive the matching multicast streams).
207 2007-09-08 Frédéric Bernon
208 * sockets.c, ip.h, api.h, tcp.h: declare a "struct ip_pcb" which only contains
209 IP_PCB. Add in the netconn's "pcb" union a "struct ip_pcb *ip;" (no size change).
210 Use this new field to access to common pcb fields (ttl, tos, so_options, etc...).
211 Enable to access to these fields with LWIP_TCP=0.
213 2007-09-05 Frédéric Bernon
214 * udp.c, ipv4/icmp.c, ipv4/ip.c, ipv6/icmp.c, ipv6/ip6.c, ipv4/icmp.h,
215 ipv6/icmp.h, opt.h: Integrate "task #7272 : LWIP_ICMP option". The new option
216 LWIP_ICMP enable/disable ICMP module inside the IP stack (enable per default).
217 Be careful, disabling ICMP make your product non-compliant to RFC1122, but
218 help to reduce footprint, and to reduce "visibility" on the Internet.
220 2007-09-05 Frédéric Bernon, Bill Florac
221 * opt.h, sys.h, tcpip.c, slipif.c, ppp.c, sys_arch.txt: Change parameters list
222 for sys_thread_new (see "task #7252 : Create sys_thread_new_ex()"). Two new
223 parameters have to be provided: a task name, and a task stack size. For this
224 one, since it's platform dependant, you could define the best one for you in
225 your lwipopts.h. For port maintainers, you can just add these new parameters
226 in your sys_arch.c file, and but it's not mandatory, use them in your OS
229 2007-09-05 Frédéric Bernon
230 * inet.c, autoip.c, msg_in.c, msg_out.c, init.c: Move some build time checkings
231 inside init.c for task #7142 "Sanity check user-configurable values".
233 2007-09-04 Frédéric Bernon, Bill Florac
234 * igmp.h, igmp.c, memp_std.h, memp.c, init.c, opt.h: Replace mem_malloc call by
235 memp_malloc, and use a new MEMP_NUM_IGMP_GROUP option (see opt.h to define the
236 value). It will avoid potential fragmentation problems, use a counter to know
237 how many times a group is used on an netif, and free it when all applications
238 leave it. MEMP_NUM_IGMP_GROUP got 8 as default value (and init.c got a sanity
239 check if LWIP_IGMP!=0).
241 2007-09-03 Frédéric Bernon
242 * igmp.h, igmp.c, sockets.c, api_msg.c: Changes for "#20503 IGMP Improvement".
243 Initialize igmp_mac_filter to NULL in netif_add (this field should be set in
244 the netif's "init" function). Use the "imr_interface" field (for socket layer)
245 and/or the "interface" field (for netconn layer), for join/leave operations.
246 The igmp_join/leavegroup first parameter change from a netif to an ipaddr.
247 This field could be a netif's ipaddr, or "any" (same meaning than ip_addr_isany).
249 2007-08-30 Frédéric Bernon
250 * Add netbuf.h, netbuf.c, Change api.h, api_lib.c: #7249 "Split netbuf functions
251 from api/api_lib". Now netbuf API is independant of netconn, and can be used
252 with other API (application based on raw API, or future "socket2" API). Ports
253 maintainers just have to add src/api/netbuf.c in their makefile/projects.
255 2007-08-30 Frédéric Bernon, Jonathan Larmour
256 * init.c: Add first version of lwip_sanity_check for task #7142 "Sanity check
257 user-configurable values".
259 2007-08-29 Frédéric Bernon
260 * igmp.h, igmp.c, tcpip.c, init.c, netif.c: change igmp_init and add igmp_start.
261 igmp_start is call inside netif_add. Now, igmp initialization is in the same
262 spirit than the others modules. Modify some IGMP debug traces.
264 2007-08-29 Frédéric Bernon
265 * Add init.h, init.c, Change opt.h, tcpip.c: Task #7213 "Add a lwip_init function"
266 Add lwip_init function to regroup all modules initializations, and to provide
267 a place to add code for task #7142 "Sanity check user-configurable values".
268 Ports maintainers should remove direct initializations calls from their code,
269 and add init.c in their makefiles. Note that lwip_init() function is called
270 inside tcpip_init, but can also be used by raw api users since all calls are
271 disabled when matching options are disabled. Also note that their is new options
272 in opt.h, you should configure in your lwipopts.h (they are enabled per default).
274 2007-08-26 Marc Boucher
275 * api_msg.c: do_close_internal(): Reset the callbacks and arg (conn) to NULL
276 since they can under certain circumstances be called with an invalid conn
277 pointer after the connection has been closed (and conn has been freed).
279 2007-08-25 Frédéric Bernon (Artem Migaev's Patch)
280 * netif.h, netif.c: Integrate "patch #6163 : Function to check if link layer is up".
281 Add a netif_is_link_up() function if LWIP_NETIF_LINK_CALLBACK option is set.
283 2007-08-22 Frédéric Bernon
284 * netif.h, netif.c, opt.h: Rename LWIP_NETIF_CALLBACK in LWIP_NETIF_STATUS_CALLBACK
285 to be coherent with new LWIP_NETIF_LINK_CALLBACK option before next release.
287 2007-08-22 Frédéric Bernon
288 * tcpip.h, tcpip.c, ethernetif.c, opt.h: remove options ETHARP_TCPIP_INPUT &
289 ETHARP_TCPIP_ETHINPUT, now, only "ethinput" code is supported, even if the
290 name is tcpip_input (we keep the name of 1.2.0 function).
292 2007-08-17 Jared Grubb
293 * memp_std.h, memp.h, memp.c, mem.c, stats.c: (Task #7136) Centralize mempool
294 settings into new memp_std.h and optional user file lwippools.h. This adds
295 more dynamic mempools, and allows the user to create an arbitrary number of
296 mempools for mem_malloc.
298 2007-08-16 Marc Boucher
299 * api_msg.c: Initialize newconn->state to NETCONN_NONE in accept_function;
300 otherwise it was left to NETCONN_CLOSE and sent_tcp() could prematurely
301 close the connection.
303 2007-08-16 Marc Boucher
304 * sockets.c: lwip_accept(): check netconn_peer() error return.
306 2007-08-16 Marc Boucher
307 * mem.c, mem.h: Added mem_calloc().
309 2007-08-16 Marc Boucher
310 * tcpip.c, tcpip.h memp.c, memp.h: Added distinct memp (MEMP_TCPIP_MSG_INPKT)
311 for input packets to prevent floods from consuming all of MEMP_TCPIP_MSG
312 and starving other message types.
313 Renamed MEMP_TCPIP_MSG to MEMP_TCPIP_MSG_API
315 2007-08-16 Marc Boucher
316 * pbuf.c, pbuf.h, etharp.c, tcp_in.c, sockets.c: Split pbuf flags in pbuf
317 type and flgs (later renamed to flags).
318 Use enum pbuf_flag as pbuf_type. Renumber PBUF_FLAG_*.
319 Improved lwip_recvfrom(). TCP push now propagated.
321 2007-08-16 Marc Boucher
322 * ethernetif.c, contrib/ports/various: ethbroadcast now a shared global
325 2007-08-16 Marc Boucher
326 * ppp_oe.c ppp_oe.h, auth.c chap.c fsm.c lcp.c ppp.c ppp.h,
327 etharp.c ethernetif.c, etharp.h, opt.h tcpip.h, tcpip.c:
328 Added PPPoE support and various PPP improvements.
330 2007-07-25 Simon Goldschmidt
331 * api_lib.c, ip_frag.c, pbuf.c, api.h, pbuf.h: Introduced pbuf_copy_partial,
332 making netbuf_copy_partial use this function.
334 2007-07-25 Simon Goldschmidt
335 * tcp_in.c: Fix bug #20506: Slow start / initial congestion window starts with
336 2 * mss (instead of 1 * mss previously) to comply with some newer RFCs and
339 2007-07-13 Jared Grubb (integrated by Frédéric Bernon)
340 * opt.h, netif.h, netif.c, ethernetif.c: Add new configuration option to add
341 a link callback in the netif struct, and functions to handle it. Be carefull
342 for port maintainers to add the NETIF_FLAG_LINK_UP flag (like in ethernetif.c)
343 if you want to be sure to be compatible with future changes...
345 2007-06-30 Frédéric Bernon
346 * sockets.h, sockets.c: Implement MSG_PEEK flag for recv/recvfrom functions.
348 2007-06-21 Simon Goldschmidt
349 * etharp.h, etharp.c: Combined etharp_request with etharp_raw for both
350 LWIP_AUTOIP =0 and =1 to remove redundant code.
352 2007-06-21 Simon Goldschmidt
353 * mem.c, memp.c, mem.h, memp.h, opt.h: task #6863: Introduced the option
354 MEM_USE_POOLS to use 4 pools with different sized elements instead of a
355 heap. This both prevents memory fragmentation and gives a higher speed
356 at the cost of more memory consumption. Turned off by default.
358 2007-06-21 Simon Goldschmidt
359 * api_lib.c, api_msg.c, api.h, api_msg.h: Converted the length argument of
360 netconn_write (and therefore also api_msg_msg.msg.w.len) from u16_t into
361 int to be able to send a bigger buffer than 64K with one time (mainly
362 used from lwip_send).
364 2007-06-21 Simon Goldschmidt
365 * tcp.h, api_msg.c: Moved the nagle algorithm from netconn_write/do_write
366 into a define (tcp_output_nagle) in tcp.h to provide it to raw api users, too.
368 2007-06-21 Simon Goldschmidt
369 * api.h, api_lib.c, api_msg.c: Fixed bug #20021: Moved sendbuf-processing in
370 netconn_write from api_lib.c to api_msg.c to also prevent multiple context-
371 changes on low memory or empty send-buffer.
373 2007-06-18 Simon Goldschmidt
374 * etharp.c, etharp.h: Changed etharp to use a defined hardware address length
375 of 6 to avoid loading netif->hwaddr_len every time (since this file is only
376 used for ethernet and struct eth_addr already had a defined length of 6).
378 2007-06-17 Simon Goldschmidt
379 * sockets.c, sockets.h: Implemented socket options SO_NO_CHECK for UDP sockets
380 to disable UDP checksum generation on transmit.
382 2007-06-13 Frédéric Bernon, Simon Goldschmidt
383 * debug.h, api_msg.c: change LWIP_ERROR to use it to check errors like invalid
384 pointers or parameters, and let the possibility to redefined it in cc.h. Use
385 this macro to check "conn" parameter in api_msg.c functions.
387 2007-06-11 Simon Goldschmidt
388 * sockets.c, sockets.h: Added UDP lite support for sockets
390 2007-06-10 Simon Goldschmidt
391 * udp.h, opt.h, api_msg.c, ip.c, udp.c: Included switch LWIP_UDPLITE (enabled
392 by default) to switch off UDP-Lite support if not needed (reduces udp.c code
395 2007-06-09 Dominik Spies (integrated by Frédéric Bernon)
396 * autoip.h, autoip.c, dhcp.h, dhcp.c, netif.h, netif.c, etharp.h, etharp.c, opt.h:
397 AutoIP implementation available for IPv4, with new options LWIP_AUTOIP and
398 LWIP_DHCP_AUTOIP_COOP if you want to cooperate with DHCP. Some tips to adapt
399 (see TODO mark in the source code).
401 2007-06-09 Simon Goldschmidt
402 * etharp.h, etharp.c, ethernetif.c: Modified order of parameters for
403 etharp_output() to match netif->output so etharp_output() can be used
404 directly as netif->output to save one function call.
406 2007-06-08 Simon Goldschmidt
407 * netif.h, ethernetif.c, slipif.c, loopif.c: Added define
408 NETIF_INIT_SNMP(netif, type, speed) to initialize per-netif snmp variables,
409 added initialization of those to ethernetif, slipif and loopif.
411 2007-05-18 Simon Goldschmidt
412 * opt.h, ip_frag.c, ip_frag.h, ip.c: Added option IP_FRAG_USES_STATIC_BUF
413 (defaulting to off for now) that can be set to 0 to send fragmented
414 packets by passing PBUF_REFs down the stack.
416 2007-05-23 Frédéric Bernon
417 * api_lib.c: Implement SO_RCVTIMEO for accept and recv on TCP
418 connections, such present in patch #5959.
420 2007-05-23 Frédéric Bernon
421 * api.h, api_lib.c, api_msg.c, sockets.c: group the different NETCONN_UDPxxx
422 code in only one part...
424 2007-05-18 Simon Goldschmidt
425 * opt.h, memp.h, memp.c: Added option MEMP_OVERFLOW_CHECK to check for memp
426 elements to overflow. This is achieved by adding some bytes before and after
427 each pool element (increasing their size, of course), filling them with a
428 prominent value and checking them on freeing the element.
429 Set it to 2 to also check every element in every pool each time memp_malloc()
430 or memp_free() is called (slower but more helpful).
432 2007-05-10 Simon Goldschmidt
433 * opt.h, memp.h, memp.c, pbuf.c (see task #6831): use a new memp pool for
434 PBUF_POOL pbufs instead of the old pool implementation in pbuf.c to reduce
437 2007-05-11 Frédéric Bernon
438 * sockets.c, api_lib.c, api_msg.h, api_msg.c, netifapi.h, netifapi.c, tcpip.c:
439 Include a function pointer instead of a table index in the message to reduce
440 footprint. Disable some part of lwip_send and lwip_sendto if some options are
441 not set (LWIP_TCP, LWIP_UDP, LWIP_RAW).
443 2007-05-10 Simon Goldschmidt
444 * *.h (except netif/ppp/*.h): Included patch #5448: include '#ifdef __cplusplus
445 \ extern "C" {' in all header files. Now you can write your application using
446 the lwIP stack in C++ and simply #include the core files. Note I have left
447 out the netif/ppp/*h header files for now, since I don't know which files are
448 included by applications and which are for internal use only.
450 2007-05-09 Simon Goldschmidt
451 * opt.h, *.c/*.h: Included patch #5920: Create define to override C-library
452 memcpy. 2 Defines are created: MEMCPY() for normal memcpy, SMEMCPY() for
453 situations where some compilers might inline the copy and save a function
454 call. Also replaced all calls to memcpy() with calls to (S)MEMCPY().
456 2007-05-08 Simon Goldschmidt
457 * mem.h: If MEM_LIBC_MALLOC==1, allow the defines (e.g. mem_malloc() -> malloc())
458 to be overriden in case the C-library malloc implementation is not protected
459 against concurrent access.
461 2007-05-04 Simon Goldschmidt (Atte Kojo)
462 * etharp.c: Introduced fast one-entry-cache to speed up ARP lookup when sending
463 multiple packets to the same host.
465 2007-05-04 Frédéric Bernon, Jonathan Larmour
466 * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fix bug #19162 "lwip_sento: a possible
467 to corrupt remote addr/port connection state". Reduce problems "not enought memory" with
468 netbuf (if we receive lot of datagrams). Improve lwip_sendto (only one exchange between
469 sockets api and api_msg which run in tcpip_thread context). Add netconn_sento function.
470 Warning, if you directly access to "fromaddr" & "fromport" field from netbuf struct,
471 these fields are now renamed "addr" & "port".
473 2007-04-11 Jonathan Larmour
474 * sys.h, api_lib.c: Provide new sys_mbox_tryfetch function. Require ports to provide new
475 sys_arch_mbox_tryfetch function to get a message if one is there, otherwise return
476 with SYS_MBOX_EMPTY. sys_arch_mbox_tryfetch can be implemented as a function-like macro
477 by the port in sys_arch.h if desired.
479 2007-04-06 Frédéric Bernon, Simon Goldschmidt
480 * opt.h, tcpip.h, tcpip.c, netifapi.h, netifapi.c: New configuration option LWIP_NETIF_API
481 allow to use thread-safe functions to add/remove netif in list, and to start/stop dhcp
482 clients, using new functions from netifapi.h. Disable as default (no port change to do).
484 2007-04-05 Frédéric Bernon
485 * sockets.c: remplace ENOBUFS errors on alloc_socket by ENFILE to be more BSD compliant.
487 2007-04-04 Simon Goldschmidt
488 * arch.h, api_msg.c, dhcp.c, msg_in.c, sockets.c: Introduced #define LWIP_UNUSED_ARG(x)
489 use this for and architecture-independent form to tell the compiler you intentionally
490 are not using this variable. Can be overriden in cc.h.
492 2007-03-28 Frédéric Bernon
493 * opt.h, netif.h, dhcp.h, dhcp.c: New configuration option LWIP_NETIF_HOSTNAME allow to
494 define a hostname in netif struct (this is just a pointer, so, you can use a hardcoded
495 string, point on one of your's ethernetif field, or alloc a string you will free yourself).
496 It will be used by DHCP to register a client hostname, but can also be use when you call
499 2007-03-28 Frédéric Bernon
500 * netif.h, netif.c: A new NETIF_FLAG_ETHARP flag is defined in netif.h, to allow to
501 initialize a network interface's flag with. It tell this interface is an ethernet
502 device, and we can use ARP with it to do a "gratuitous ARP" (RFC 3220 "IP Mobility
503 Support for IPv4" section 4.6) when interface is "up" with netif_set_up().
505 2007-03-26 Frédéric Bernon, Jonathan Larmour
506 * opt.h, tcpip.c: New configuration option LWIP_ARP allow to disable ARP init at build
507 time if you only use PPP or SLIP. The default is enable. Note we don't have to call
508 etharp_init in your port's initilization sequence if you use tcpip.c, because this call
509 is done in tcpip_init function.
511 2007-03-22 Frédéric Bernon
512 * stats.h, stats.c, msg_in.c: Stats counters can be change to u32_t if necessary with the
513 new option LWIP_STATS_LARGE. If you need this option, define LWIP_STATS_LARGE to 1 in
514 your lwipopts.h. More, unused counters are not defined in the stats structs, and not
515 display by stats_display(). Note that some options (SYS_STATS and RAW_STATS) are defined
516 but never used. Fix msg_in.c with the correct #if test for a stat display.
518 2007-03-21 Kieran Mansley
519 * netif.c, netif.h: Apply patch#4197 with some changes (originator: rireland@hmgsl.com).
520 Provides callback on netif up/down state change.
522 2007-03-11 Frédéric Bernon, Mace Gael, Steve Reynolds
523 * sockets.h, sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c, igmp.h, igmp.c,
524 ip.c, netif.h, tcpip.c, opt.h:
525 New configuration option LWIP_IGMP to enable IGMP processing. Based on only one
526 filter per all network interfaces. Declare a new function in netif to enable to
527 control the MAC filter (to reduce lwIP traffic processing).
529 2007-03-11 Frédéric Bernon
530 * tcp.h, tcp.c, sockets.c, tcp_out.c, tcp_in.c, opt.h: Keepalive values can
531 be configured at run time with LWIP_TCP_KEEPALIVE, but don't change this
532 unless you know what you're doing (default are RFC1122 compliant). Note
533 that TCP_KEEPIDLE and TCP_KEEPINTVL have to be set in seconds.
535 2007-03-08 Frédéric Bernon
536 * tcp.h: Keepalive values can be configured at compile time, but don't change
537 this unless you know what you're doing (default are RFC1122 compliant).
539 2007-03-08 Frédéric Bernon
540 * sockets.c, api.h, api_lib.c, tcpip.c, sys.h, sys.c, err.c, opt.h:
541 Implement LWIP_SO_RCVTIMEO configuration option to enable/disable SO_RCVTIMEO
542 on UDP sockets/netconn.
544 2007-03-08 Simon Goldschmidt
545 * snmp_msg.h, msg_in.c: SNMP UDP ports can be configured at compile time.
547 2007-03-06 Frédéric Bernon
548 * api.h, api_lib.c, sockets.h, sockets.c, tcpip.c, sys.h, sys.c, err.h:
549 Implement SO_RCVTIMEO on UDP sockets/netconn.
551 2007-02-28 Kieran Mansley (based on patch from Simon Goldschmidt)
552 * api_lib.c, tcpip.c, memp.c, memp.h: make API msg structs allocated
553 on the stack and remove the API msg type from memp
555 2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
556 * sockets.h, sockets.c: Move socket initialization to new
557 lwip_socket_init() function.
558 NOTE: this changes the API with ports. Ports will have to be
559 updated to call lwip_socket_init() now.
561 2007-02-26 Jonathan Larmour (based on patch from Simon Goldschmidt)
562 * api_lib.c: Use memcpy in netbuf_copy_partial.
567 2007-12-21 Simon Goldschmidt
568 * sys.h, api_lib.c, api_msg.c, sockets.c: fix bug #21698: "netconn->recv_avail
569 is not protected" by using new macros for interlocked access to modify/test
572 2007-12-20 Kieran Mansley (based on patch from Oleg Tyshev)
573 * tcp_in.c: fix bug# 21535 (nrtx not reset correctly in SYN_SENT state)
575 2007-12-20 Kieran Mansley (based on patch from Per-Henrik Lundbolm)
576 * tcp.c, tcp_in.c, tcp_out.c, tcp.h: fix bug #20199 (better handling
577 of silly window avoidance and prevent lwIP from shrinking the window)
579 2007-12-04 Simon Goldschmidt
580 * tcp.c, tcp_in.c: fix bug #21699 (segment leak in ooseq processing when last
581 data packet was lost): add assert that all segment lists are empty in
582 tcp_pcb_remove before setting pcb to CLOSED state; don't directly set CLOSED
583 state from LAST_ACK in tcp_process
585 2007-12-02 Simon Goldschmidt
586 * sockets.h: fix bug #21654: exclude definition of struct timeval from #ifndef FD_SET
587 If including <sys/time.h> for system-struct timeval, LWIP_TIMEVAL_PRIVATE now
588 has to be set to 0 in lwipopts.h
590 2007-12-02 Simon Goldschmidt
591 * api_msg.c, api_lib.c: fix bug #21656 (recvmbox problem in netconn API): always
592 allocate a recvmbox in netconn_new_with_proto_and_callback. For a tcp-listen
593 netconn, this recvmbox is later freed and a new mbox is allocated for acceptmbox.
594 This is a fix for thread-safety and allocates all items needed for a netconn
595 when the netconn is created.
597 2007-11-30 Simon Goldschmidt
598 * udp.c: first attempt to fix bug #21655 (DHCP doesn't work reliably with multiple
599 netifs): if LWIP_DHCP is enabled, UDP packets to DHCP_CLIENT_PORT are passed
600 to netif->dhcp->pcb only (if that exists) and not to any other pcb for the same
601 port (only solution to let UDP pcbs 'bind' to a netif instead of an IP address)
603 2007-11-27 Simon Goldschmidt
604 * ip.c: fixed bug #21643 (udp_send/raw_send don't fail if netif is down) by
605 letting ip_route only use netifs that are up.
607 2007-11-27 Simon Goldschmidt
608 * err.h, api_lib.c, api_msg.c, sockets.c: Changed error handling: ERR_MEM, ERR_BUF
609 and ERR_RTE are seen as non-fatal, all other errors are fatal. netconns and
610 sockets block most operations once they have seen a fatal error.
612 2007-11-27 Simon Goldschmidt
613 * udp.h, udp.c, dhcp.c: Implemented new function udp_sendto_if which takes the
614 netif to send as an argument (to be able to send on netifs that are down).
616 2007-11-26 Simon Goldschmidt
617 * tcp_in.c: Fixed bug #21582: pcb->acked accounting can be wrong when ACKs
620 2007-11-21 Simon Goldschmidt
621 * tcp.h, tcp_out.c, api_msg.c: Fixed bug #20287: tcp_output_nagle sends too early
622 Fixed the nagle algorithm; nagle now also works for all raw API applications
623 and has to be explicitly disabled with 'tcp_pcb->flags |= TF_NODELAY'
625 2007-11-12 Frédéric Bernon
626 * sockets.c, api.h, api_lib.c, api_msg.h, api_msg.c: Fixed bug #20900. Now, most
627 of the netconn_peer and netconn_addr processing is done inside tcpip_thread
628 context in do_getaddr.
630 2007-11-10 Simon Goldschmidt
631 * etharp.c: Fixed bug: assert fired when MEMP_ARP_QUEUE was empty (which can
632 happen any time). Now the packet simply isn't enqueued when out of memory.
634 2007-11-01 Simon Goldschmidt
635 * tcp.c, tcp_in.c: Fixed bug #21494: The send mss (pcb->mss) is set to 536 (or
636 TCP_MSS if that is smaller) as long as no MSS option is received from the
639 2007-11-01 Simon Goldschmidt
640 * tcp.h, tcp.c, tcp_in.c: Fixed bug #21491: The MSS option sent (with SYN)
641 is now based on TCP_MSS instead of pcb->mss (on passive open now effectively
642 sending our configured TCP_MSS instead of the one received).
644 2007-11-01 Simon Goldschmidt
645 * tcp_in.c: Fixed bug #21181: On active open, the initial congestion window was
646 calculated based on the configured TCP_MSS, not on the MSS option received
649 2007-10-09 Simon Goldschmidt
650 * udp.c, inet.c, inet.h: Fixed UDPLite: send: Checksum was always generated too
651 short and also was generated wrong if checksum coverage != tot_len;
652 receive: checksum was calculated wrong if checksum coverage != tot_len
654 2007-10-08 Simon Goldschmidt
655 * mem.c: lfree was not updated in mem_realloc!
657 2007-10-07 Frédéric Bernon
658 * sockets.c, api.h, api_lib.c: First step to fix "bug #20900 : Potential
659 crash error problem with netconn_peer & netconn_addr". VERY IMPORTANT:
660 this change cause an API breakage for netconn_addr, since a parameter
661 type change. Any compiler should cause an error without any changes in
662 yours netconn_peer calls (so, it can't be a "silent change"). It also
663 reduce a little bit the footprint for socket layer (lwip_getpeername &
664 lwip_getsockname use now a common lwip_getaddrname function since
665 netconn_peer & netconn_addr have the same parameters).
667 2007-09-20 Simon Goldschmidt
668 * tcp.c: Fixed bug #21080 (tcp_bind without check pcbs in TIME_WAIT state)
669 by checking tcp_tw_pcbs also
671 2007-09-19 Simon Goldschmidt
672 * icmp.c: Fixed bug #21107 (didn't reset IP TTL in ICMP echo replies)
674 2007-09-15 Mike Kleshov
675 * mem.c: Fixed bug #21077 (inaccuracy in calculation of lwip_stat.mem.used)
677 2007-09-06 Frédéric Bernon
678 * several-files: replace some #include "arch/cc.h" by "lwip/arch.h", or simply remove
679 it as long as "lwip/opt.h" is included before (this one include "lwip/debug.h" which
680 already include "lwip/arch.h"). Like that, default defines are provided by "lwip/arch.h"
681 if they are not defined in cc.h, in the same spirit than "lwip/opt.h" for lwipopts.h.
683 2007-08-30 Frédéric Bernon
684 * igmp.h, igmp.c: Some changes to remove some redundant code, add some traces,
685 and fix some coding style.
687 2007-08-28 Frédéric Bernon
688 * tcpip.c: Fix TCPIP_MSG_INPKT processing: now, tcpip_input can be used for any
689 kind of packets. These packets are considered like Ethernet packets (payload
690 pointing to ethhdr) if the netif got the NETIF_FLAG_ETHARP flag. Else, packets
691 are considered like IP packets (payload pointing to iphdr).
693 2007-08-27 Frédéric Bernon
694 * api.h, api_lib.c, api_msg.c: First fix for "bug #20900 : Potential crash error
695 problem with netconn_peer & netconn_addr". Introduce NETCONN_LISTEN netconn_state
696 and remove obsolete ones (NETCONN_RECV & NETCONN_ACCEPT).
698 2007-08-24 Kieran Mansley
699 * inet.c Modify (acc >> 16) test to ((acc >> 16) != 0) to help buggy
700 compiler (Paradigm C++)
702 2007-08-09 Frédéric Bernon, Bill Florac
703 * stats.h, stats.c, igmp.h, igmp.c, opt.h: Fix for bug #20503 : IGMP Improvement.
704 Introduce IGMP_STATS to centralize statistics management.
706 2007-08-09 Frédéric Bernon, Bill Florac
707 * udp.c: Fix for bug #20503 : IGMP Improvement. Enable to receive a multicast
708 packet on a udp pcb binded on an netif's IP address, and not on "any".
710 2007-08-09 Frédéric Bernon, Bill Florac
711 * igmp.h, igmp.c, ip.c: Fix minor changes from bug #20503 : IGMP Improvement.
712 This is mainly on using lookup/lookfor, and some coding styles...
714 2007-07-26 Frédéric Bernon (and "thedoctor")
715 * igmp.c: Fix bug #20595 to accept IGMPv3 "Query" messages.
717 2007-07-25 Simon Goldschmidt
718 * api_msg.c, tcp.c: Another fix for bug #20021: by not returning an error if
719 tcp_output fails in tcp_close, the code in do_close_internal gets simpler
720 (tcp_output is called again later from tcp timers).
722 2007-07-25 Simon Goldschmidt
723 * ip_frag.c: Fixed bug #20429: use the new pbuf_copy_partial instead of the old
724 copy_from_pbuf, which illegally modified the given pbuf.
726 2007-07-25 Simon Goldschmidt
727 * tcp_out.c: tcp_enqueue: pcb->snd_queuelen didn't work for chaine PBUF_RAMs:
728 changed snd_queuelen++ to snd_queuelen += pbuf_clen(p).
730 2007-07-24 Simon Goldschmidt
731 * api_msg.c, tcp.c: Fix bug #20480: Check the pcb passed to tcp_listen() for the
732 correct state (must be CLOSED).
734 2007-07-13 Thomas Taranowski (commited by Jared Grubb)
735 * memp.c: Fix bug #20478: memp_malloc returned NULL+MEMP_SIZE on failed
736 allocation. It now returns NULL.
738 2007-07-13 Frédéric Bernon
739 * api_msg.c: Fix bug #20318: api_msg "recv" callbacks don't call pbuf_free in
742 2007-07-13 Frédéric Bernon
743 * api_msg.c: Fix bug #20315: possible memory leak problem if tcp_listen failed,
744 because current code doesn't follow rawapi.txt documentation.
746 2007-07-13 Kieran Mansley
747 * src/core/tcp_in.c Apply patch#5741 from Oleg Tyshev to fix bug in
748 out of sequence processing of received packets
750 2007-07-03 Simon Goldschmidt
751 * nearly-all-files: Added assertions where PBUF_RAM pbufs are used and an
752 assumption is made that this pbuf is in one piece (i.e. not chained). These
753 assumptions clash with the possibility of converting to fully pool-based
754 pbuf implementations, where PBUF_RAM pbufs might be chained.
756 2007-07-03 Simon Goldschmidt
757 * api.h, api_lib.c, api_msg.c: Final fix for bug #20021 and some other problems
758 when closing tcp netconns: removed conn->sem, less context switches when
759 closing, both netconn_close and netconn_delete should safely close tcp
762 2007-07-02 Simon Goldschmidt
763 * ipv4/ip.h, ipv6/ip.h, opt.h, netif.h, etharp.h, ipv4/ip.c, netif.c, raw.c,
764 tcp_out.c, udp.c, etharp.c: Added option LWIP_NETIF_HWADDRHINT (default=off)
765 to cache ARP table indices with each pcb instead of single-entry cache for
768 2007-07-02 Simon Goldschmidt
769 * tcp.h, tcp.c, tcp_in.c, tcp_out.c: Added some ASSERTS and casts to prevent
770 warnings when assigning to smaller types.
772 2007-06-28 Simon Goldschmidt
773 * tcp_out.c: Added check to prevent tcp_pcb->snd_queuelen from overflowing.
775 2007-06-28 Simon Goldschmidt
776 * tcp.h: Fixed bug #20287: Fixed nagle algorithm (sending was done too early if
777 a segment contained chained pbufs)
779 2007-06-28 Frédéric Bernon
780 * autoip.c: replace most of rand() calls by a macro LWIP_AUTOIP_RAND which compute
781 a "pseudo-random" value based on netif's MAC and some autoip fields. It's always
782 possible to define this macro in your own lwipopts.h to always use C library's
783 rand(). Note that autoip_create_rand_addr doesn't use this macro.
785 2007-06-28 Frédéric Bernon
786 * netifapi.h, netifapi.c, tcpip.h, tcpip.c: Update code to handle the option
787 LWIP_TCPIP_CORE_LOCKING, and do some changes to be coherent with last modifications
788 in api_lib/api_msg (use pointers and not type with table, etc...)
790 2007-06-26 Simon Goldschmidt
791 * udp.h: Fixed bug #20259: struct udp_hdr was lacking the packin defines.
793 2007-06-25 Simon Goldschmidt
794 * udp.c: Fixed bug #20253: icmp_dest_unreach was called with a wrong p->payload
795 for udp packets with no matching pcb.
797 2007-06-25 Simon Goldschmidt
798 * udp.c: Fixed bug #20220: UDP PCB search in udp_input(): a non-local match
799 could get udp input packets if the remote side matched.
801 2007-06-13 Simon Goldschmidt
802 * netif.c: Fixed bug #20180 (TCP pcbs listening on IP_ADDR_ANY could get
803 changed in netif_set_ipaddr if previous netif->ip_addr.addr was 0.
805 2007-06-13 Simon Goldschmidt
806 * api_msg.c: pcb_new sets conn->err if protocol is not implemented
807 -> netconn_new_..() does not allocate a new connection for unsupported
810 2007-06-13 Frédéric Bernon, Simon Goldschmidt
811 * api_lib.c: change return expression in netconn_addr and netconn_peer, because
812 conn->err was reset to ERR_OK without any reasons (and error was lost)...
814 2007-06-13 Frédéric Bernon, Matthias Weisser
815 * opt.h, mem.h, mem.c, memp.c, pbuf.c, ip_frag.c, vj.c: Fix bug #20162. Rename
816 MEM_ALIGN in LWIP_MEM_ALIGN and MEM_ALIGN_SIZE in LWIP_MEM_ALIGN_SIZE to avoid
817 some macro names collision with some OS macros.
819 2007-06-11 Simon Goldschmidt
820 * udp.c: UDP Lite: corrected the use of chksum_len (based on RFC3828: if it's 0,
821 create checksum over the complete packet. On RX, if it's < 8 (and not 0),
822 discard the packet. Also removed the duplicate 'udphdr->chksum = 0' for both
825 2007-06-11 Srinivas Gollakota & Oleg Tyshev
826 * tcp_out.c: Fix for bug #20075 : "A problem with keep-alive timer and TCP flags"
827 where TCP flags wasn't initialized in tcp_keepalive.
829 2007-06-03 Simon Goldschmidt
830 * udp.c: udp_input(): Input pbuf was not freed if pcb had no recv function
831 registered, p->payload was modified without modifying p->len if sending
832 icmp_dest_unreach() (had no negative effect but was definitively wrong).
834 2007-06-03 Simon Goldschmidt
835 * icmp.c: Corrected bug #19937: For responding to an icmp echo request, icmp
836 re-used the input pbuf even if that didn't have enough space to include the
837 link headers. Now the space is tested and a new pbuf is allocated for the
838 echo response packet if the echo request pbuf isn't big enough.
840 2007-06-01 Simon Goldschmidt
841 * sockets.c: Checked in patch #5914: Moved sockopt processing into tcpip_thread.
843 2007-05-23 Frédéric Bernon
844 * api_lib.c, sockets.c: Fixed bug #5958 for netconn_listen (acceptmbox only
845 allocated by do_listen if success) and netconn_accept errors handling. In
846 most of api_lib functions, we replace some errors checkings like "if (conn==NULL)"
847 by ASSERT, except for netconn_delete.
849 2007-05-23 Frédéric Bernon
850 * api_lib.c: Fixed bug #5957 "Safe-thread problem inside netconn_recv" to return
851 an error code if it's impossible to fetch a pbuf on a TCP connection (and not
852 directly close the recvmbox).
854 2007-05-22 Simon Goldschmidt
855 * tcp.c: Fixed bug #1895 (tcp_bind not correct) by introducing a list of
856 bound but unconnected (and non-listening) tcp_pcbs.
858 2007-05-22 Frédéric Bernon
859 * sys.h, sys.c, api_lib.c, tcpip.c: remove sys_mbox_fetch_timeout() (was only
860 used for LWIP_SO_RCVTIMEO option) and use sys_arch_mbox_fetch() instead of
861 sys_mbox_fetch() in api files. Now, users SHOULD NOT use internal lwIP features
862 like "sys_timeout" in their application threads.
864 2007-05-22 Frédéric Bernon
865 * api.h, api_lib.c, api_msg.h, api_msg.c: change the struct api_msg_msg to see
866 which parameters are used by which do_xxx function, and to avoid "misusing"
867 parameters (patch #5938).
869 2007-05-22 Simon Goldschmidt
870 * api_lib.c, api_msg.c, raw.c, api.h, api_msg.h, raw.h: Included patch #5938:
871 changed raw_pcb.protocol from u16_t to u8_t since for IPv4 and IPv6, proto
872 is only 8 bits wide. This affects the api, as there, the protocol was
875 2007-05-18 Simon Goldschmidt
876 * memp.c: addition to patch #5913: smaller pointer was returned but
877 memp_memory was the same size -> did not save memory.
879 2007-05-16 Simon Goldschmidt
880 * loopif.c, slipif.c: Fix bug #19729: free pbuf if netif->input() returns
883 2007-05-16 Simon Goldschmidt
884 * api_msg.c, udp.c: If a udp_pcb has a local_ip set, check if it is the same
885 as the one of the netif used for sending to prevent sending from old
886 addresses after a netif address gets changed (partly fixes bug #3168).
888 2007-05-16 Frédéric Bernon
889 * tcpip.c, igmp.h, igmp.c: Fixed bug "#19800 : IGMP: igmp_tick() will not work
890 with NO_SYS=1". Note that igmp_init is always in tcpip_thread (and not in
891 tcpip_init) because we have to be sure that network interfaces are already
892 added (mac filter is updated only in igmp_init for the moment).
894 2007-05-16 Simon Goldschmidt
895 * mem.c, memp.c: Removed semaphores from memp, changed sys_sem_wait calls
896 into sys_arch_sem_wait calls to prevent timers from running while waiting
897 for the heap. This fixes bug #19167.
899 2007-05-13 Simon Goldschmidt
900 * tcp.h, sockets.h, sockets.c: Fixed bug from patch #5865 by moving the defines
901 for socket options (lwip_set/-getsockopt) used with level IPPROTO_TCP from
904 2007-05-07 Simon Goldschmidt
905 * mem.c: Another attempt to fix bug #17922.
907 2007-05-04 Simon Goldschmidt
908 * pbuf.c, pbuf.h, etharp.c: Further update to ARP queueing: Changed pbuf_copy()
909 implementation so that it can be reused (don't allocate the target
910 pbuf inside pbuf_copy()).
912 2007-05-04 Simon Goldschmidt
913 * memp.c: checked in patch #5913: in memp_malloc() we can return memp as mem
914 to save a little RAM (next pointer of memp is not used while not in pool).
917 * sockets.c: Fix ioctl FIONREAD when some data remains from last recv.
920 2007-04-23 Simon Goldschmidt
921 * loopif.c, loopif.h, opt.h, src/netif/FILES: fix bug #2595: "loopif results
922 in NULL reference for incoming TCP packets". Loopif has to be configured
923 (using LWIP_LOOPIF_MULTITHREADING) to directly call netif->input()
924 (multithreading environments, e.g. netif->input() = tcpip_input()) or
925 putting packets on a list that is fed to the stack by calling loopif_poll()
926 (single-thread / NO_SYS / polling environment where e.g.
927 netif->input() = ip_input).
929 2007-04-17 Jonathan Larmour
930 * pbuf.c: Use s32_t in pbuf_realloc(), as an s16_t can't reliably hold
931 the difference between two u16_t's.
932 * sockets.h: FD_SETSIZE needs to match number of sockets, which is
933 MEMP_NUM_NETCONN in sockets.c right now.
935 2007-04-12 Jonathan Larmour
936 * icmp.c: Reset IP header TTL in ICMP ECHO responses (bug #19580).
938 2007-04-12 Kieran Mansley
939 * tcp.c, tcp_in.c, tcp_out.c, tcp.h: Modify way the retransmission
940 timer is reset to fix bug#19434, with help from Oleg Tyshev.
942 2007-04-11 Simon Goldschmidt
943 * etharp.c, pbuf.c, pbuf.h: 3rd fix for bug #11400 (arp-queuing): More pbufs than
944 previously thought need to be copied (everything but PBUF_ROM!). Cleaned up
945 pbuf.c: removed functions no needed any more (by etharp).
947 2007-04-11 Kieran Mansley
948 * inet.c, ip_addr.h, sockets.h, sys.h, tcp.h: Apply patch #5745: Fix
949 "Constant is long" warnings with 16bit compilers. Contributed by
950 avatar@mmlab.cse.yzu.edu.tw
952 2007-04-05 Frédéric Bernon, Jonathan Larmour
953 * api_msg.c: Fix bug #16830: "err_tcp() posts to connection mailbox when no pend on
954 the mailbox is active". Now, the post is only done during a connect, and do_send,
955 do_write and do_join_leave_group don't do anything if a previous error was signaled.
957 2007-04-03 Frédéric Bernon
958 * ip.c: Don't set the IP_DF ("Don't fragment") flag in the IP header in IP output
959 packets. See patch #5834.
961 2007-03-30 Frédéric Bernon
962 * api_msg.c: add a "pcb_new" helper function to avoid redundant code, and to add
963 missing pcb allocations checking (in do_bind, and for each raw_new). Fix style.
965 2007-03-30 Frédéric Bernon
966 * most of files: prefix all debug.h define with "LWIP_" to avoid any conflict with
967 others environment defines (these were too "generic").
969 2007-03-28 Frédéric Bernon
970 * api.h, api_lib.c, sockets.c: netbuf_ref doesn't check its internal pbuf_alloc call
971 result and can cause a crash. lwip_send now check netbuf_ref result.
973 2007-03-28 Simon Goldschmidt
974 * sockets.c Remove "#include <errno.h>" from sockets.c to avoid multiple
975 definition of macros (in errno.h and lwip/arch.h) if LWIP_PROVIDE_ERRNO is
976 defined. This is the way it should have been already (looking at
979 2007-03-28 Kieran Mansley
980 * opt.h Change default PBUF_POOL_BUFSIZE (again) to accomodate default MSS +
981 IP and TCP headers *and* physical link headers
983 2007-03-26 Frédéric Bernon (based on patch from Dmitry Potapov)
984 * api_lib.c: patch for netconn_write(), fixes a possible race condition which cause
985 to send some garbage. It is not a definitive solution, but the patch does solve
986 the problem for most cases.
988 2007-03-22 Frédéric Bernon
989 * api_msg.h, api_msg.c: Remove obsolete API_MSG_ACCEPT and do_accept (never used).
991 2007-03-22 Frédéric Bernon
992 * api_lib.c: somes resources couldn't be freed if there was errors during
993 netconn_new_with_proto_and_callback.
995 2007-03-22 Frédéric Bernon
996 * ethernetif.c: update netif->input calls to check return value. In older ports,
997 it's a good idea to upgrade them, even if before, there could be another problem
998 (access to an uninitialized mailbox).
1000 2007-03-21 Simon Goldschmidt
1001 * sockets.c: fixed bug #5067 (essentialy a signed/unsigned warning fixed
1002 by casting to unsigned).
1004 2007-03-21 Frédéric Bernon
1005 * api_lib.c, api_msg.c, tcpip.c: integrate sys_mbox_fetch(conn->mbox, NULL) calls from
1006 api_lib.c to tcpip.c's tcpip_apimsg(). Now, use a local variable and not a
1007 dynamic one from memp to send tcpip_msg to tcpip_thread in a synchrone call.
1008 Free tcpip_msg from tcpip_apimsg is not done in tcpip_thread. This give a
1009 faster and more reliable communication between api_lib and tcpip.
1011 2007-03-21 Frédéric Bernon
1012 * opt.h: Add LWIP_NETIF_CALLBACK (to avoid compiler warning) and set it to 0.
1014 2007-03-21 Frédéric Bernon
1015 * api_msg.c, igmp.c, igmp.h: Fix C++ style comments
1017 2007-03-21 Kieran Mansley
1018 * opt.h Change default PBUF_POOL_BUFSIZE to accomodate default MSS +
1021 2007-03-21 Kieran Mansley
1022 * Fix all uses of pbuf_header to check the return value. In some
1023 cases just assert if it fails as I'm not sure how to fix them, but
1024 this is no worse than before when they would carry on regardless
1027 2007-03-21 Kieran Mansley
1028 * sockets.c, igmp.c, igmp.h, memp.h: Fix C++ style comments and
1029 comment out missing header include in icmp.c
1031 2007-03-20 Frédéric Bernon
1032 * memp.h, stats.c: Fix stats_display function where memp_names table wasn't
1033 synchronized with memp.h.
1035 2007-03-20 Frédéric Bernon
1036 * tcpip.c: Initialize tcpip's mbox, and verify if initialized in tcpip_input,
1037 tcpip_ethinput, tcpip_callback, tcpip_apimsg, to fix a init problem with
1038 network interfaces. Also fix a compiler warning.
1040 2007-03-20 Kieran Mansley
1041 * udp.c: Only try and use pbuf_header() to make space for headers if
1042 not a ROM or REF pbuf.
1044 2007-03-19 Frédéric Bernon
1045 * api_msg.h, api_msg.c, tcpip.h, tcpip.c: Add return types to tcpip_apimsg()
1048 2007-03-19 Frédéric Bernon
1049 * Remove unimplemented "memp_realloc" function from memp.h.
1051 2007-03-11 Simon Goldschmidt
1052 * pbuf.c: checked in patch #5796: pbuf_alloc: len field claculation caused
1055 2007-03-11 Simon Goldschmidt (based on patch from Dmitry Potapov)
1056 * api_lib.c, sockets.c, api.h, api_msg.h, sockets.h: Fixed bug #19251
1057 (missing `const' qualifier in socket functions), to get more compatible to
1058 standard POSIX sockets.
1060 2007-03-11 Frédéric Bernon (based on patch from Dmitry Potapov)
1061 * sockets.c: Add asserts inside bind, connect and sendto to check input
1062 parameters. Remove excessive set_errno() calls after get_socket(), because
1063 errno is set inside of get_socket(). Move last sock_set_errno() inside
1066 2007-03-09 Simon Goldschmidt
1067 * memp.c: Fixed bug #11400: New etharp queueing introduced bug: memp_memory
1068 was allocated too small.
1070 2007-03-06 Simon Goldschmidt
1071 * tcpip.c: Initialize dhcp timers in tcpip_thread (if LWIP_DHCP) to protect
1072 the stack from concurrent access.
1074 2007-03-06 Frédéric Bernon, Dmitry Potapov
1075 * tcpip.c, ip_frag.c, ethernetif.c: Fix some build problems, and a redundancy
1076 call to "lwip_stats.link.recv++;" in low_level_input() & ethernetif_input().
1078 2007-03-06 Simon Goldschmidt
1079 * ip_frag.c, ip_frag.h: Reduce code size: don't include code in those files
1080 if IP_FRAG == 0 and IP_REASSEMBLY == 0
1082 2007-03-06 Frédéric Bernon, Simon Goldschmidt
1083 * opt.h, ip_frag.h, tcpip.h, tcpip.c, ethernetif.c: add new configuration
1084 option named ETHARP_TCPIP_ETHINPUT, which enable the new tcpip_ethinput.
1085 Allow to do ARP processing for incoming packets inside tcpip_thread
1086 (protecting ARP layer against concurrent access). You can also disable
1087 old code using tcp_input with new define ETHARP_TCPIP_INPUT set to 0.
1088 Older ports have to use tcpip_ethinput.
1090 2007-03-06 Simon Goldschmidt (based on patch from Dmitry Potapov)
1091 * err.h, err.c: fixed compiler warning "initialization dircards qualifiers
1092 from pointer target type"
1094 2007-03-05 Frédéric Bernon
1095 * opt.h, sockets.h: add new configuration options (LWIP_POSIX_SOCKETS_IO_NAMES,
1096 ETHARP_TRUST_IP_MAC, review SO_REUSE)
1098 2007-03-04 Frédéric Bernon
1099 * api_msg.c: Remove some compiler warnings : parameter "pcb" was never
1102 2007-03-04 Frédéric Bernon
1103 * api_lib.c: Fix "[patch #5764] api_lib.c cleanup: after patch #5687" (from
1105 The api_msg struct stay on the stack (not moved to netconn struct).
1107 2007-03-04 Simon Goldschmidt (based on patch from Dmitry Potapov)
1108 * pbuf.c: Fix BUG#19168 - pbuf_free can cause deadlock (if
1109 SYS_LIGHTWEIGHT_PROT=1 & freeing PBUF_RAM when mem_sem is not available)
1110 Also fixed cast warning in pbuf_alloc()
1112 2007-03-04 Simon Goldschmidt
1113 * etharp.c, etharp.h, memp.c, memp.h, opt.h: Fix BUG#11400 - don't corrupt
1114 existing pbuf chain when enqueuing multiple pbufs to a pending ARP request
1116 2007-03-03 Frédéric Bernon
1117 * udp.c: remove obsolete line "static struct udp_pcb *pcb_cache = NULL;"
1118 It is static, and never used in udp.c except udp_init().
1120 2007-03-02 Simon Goldschmidt
1121 * tcpip.c: Moved call to ip_init(), udp_init() and tcp_init() from
1122 tcpip_thread() to tcpip_init(). This way, raw API connections can be
1123 initialized before tcpip_thread is running (e.g. before OS is started)
1125 2007-03-02 Frédéric Bernon
1126 * rawapi.txt: Fix documentation mismatch with etharp.h about etharp_tmr's call
1129 2007-02-28 Kieran Mansley
1130 * pbuf.c: Fix BUG#17645 - ensure pbuf payload pointer is not moved
1131 outside the region of the pbuf by pbuf_header()
1133 2007-02-28 Kieran Mansley
1134 * sockets.c: Fix BUG#19161 - ensure milliseconds timeout is non-zero
1135 when supplied timeout is also non-zero
1139 2006-12-05 Leon Woestenberg
1140 * CHANGELOG: Mention STABLE-1.2.0 release.
1144 2006-12-01 Christiaan Simons
1145 * mem.h, opt.h: Added MEM_LIBC_MALLOC option.
1146 Note this is a workaround. Currently I have no other options left.
1148 2006-10-26 Christiaan Simons (accepted patch by Jonathan Larmour)
1149 * ipv4/ip_frag.c: rename MAX_MTU to IP_FRAG_MAX_MTU and move define
1150 to include/lwip/opt.h.
1151 * ipv4/lwip/ip_frag.h: Remove unused IP_REASS_INTERVAL.
1152 Move IP_REASS_MAXAGE and IP_REASS_BUFSIZE to include/lwip/opt.h.
1153 * opt.h: Add above new options.
1155 2006-08-18 Christiaan Simons
1156 * tcp_{in,out}.c: added SNMP counters.
1157 * ipv4/ip.c: added SNMP counters.
1158 * ipv4/ip_frag.c: added SNMP counters.
1160 2006-08-08 Christiaan Simons
1161 * etharp.{c,h}: added etharp_find_addr() to read
1162 (stable) ethernet/IP address pair from ARP table
1164 2006-07-14 Christiaan Simons
1165 * mib_structs.c: added
1166 * include/lwip/snmp_structs.h: added
1167 * netif.{c,h}, netif/ethernetif.c: added SNMP statistics to netif struct
1169 2006-07-06 Christiaan Simons
1170 * snmp/asn1_{enc,dec}.c added
1172 * snmp/msg_{in,out}.c added
1173 * include/lwip/snmp_asn1.h added
1174 * include/lwip/snmp_msg.h added
1175 * doc/snmp_agent.txt added
1177 2006-03-29 Christiaan Simons
1178 * inet.c, inet.h: Added platform byteswap support.
1179 Added LWIP_PLATFORM_BYTESWAP define (defaults to 0) and
1180 optional LWIP_PLATFORM_HTONS(), LWIP_PLATFORM_HTONL() macros.
1184 2006-11-30 Christiaan Simons
1185 * dhcp.c: Fixed false triggers of request_timeout.
1187 2006-11-28 Christiaan Simons
1188 * netif.c: In netif_add() fixed missing clear of ip_addr, netmask, gw and flags.
1190 2006-10-11 Christiaan Simons
1191 * api_lib.c etharp.c, ip.c, memp.c, stats.c, sys.{c,h} tcp.h:
1192 Partially accepted patch #5449 for ANSI C compatibility / build fixes.
1193 * ipv4/lwip/ip.h ipv6/lwip/ip.h: Corrected UDP-Lite protocol
1194 identifier from 170 to 136 (bug #17574).
1196 2006-10-10 Christiaan Simons
1197 * api_msg.c: Fixed Nagle algorithm as reported by Bob Grice.
1199 2006-08-17 Christiaan Simons
1200 * udp.c: Fixed bug #17200, added check for broadcast
1201 destinations for PCBs bound to a unicast address.
1203 2006-08-07 Christiaan Simons
1204 * api_msg.c: Flushing TCP output in do_close() (bug #15926).
1206 2006-06-27 Christiaan Simons
1207 * api_msg.c: Applied patch for cold case (bug #11135).
1208 In accept_function() ensure newconn->callback is always initialized.
1210 2006-06-15 Christiaan Simons
1211 * mem.h: added MEM_SIZE_F alias to fix an ancient cold case (bug #1748),
1212 facilitate printing of mem_size_t and u16_t statistics.
1214 2006-06-14 Christiaan Simons
1215 * api_msg.c: Applied patch #5146 to handle allocation failures
1216 in accept() by Kevin Lawson.
1218 2006-05-26 Christiaan Simons
1219 * api_lib.c: Removed conn->sem creation and destruction
1220 from netconn_write() and added sys_sem_new to netconn_new_*.
1224 2006-03-03 Christiaan Simons
1225 * ipv4/ip_frag.c: Added bound-checking assertions on ip_reassbitmap
1226 access and added pbuf_alloc() return value checks.
1228 2006-01-01 Leon Woestenberg <leon.woestenberg@gmx.net>
1229 * tcp_{in,out}.c, tcp_out.c: Removed 'even sndbuf' fix in TCP, which is
1230 now handled by the checksum routine properly.
1232 2006-02-27 Leon Woestenberg <leon.woestenberg@gmx.net>
1233 * pbuf.c: Fix alignment; pbuf_init() would not work unless
1234 pbuf_pool_memory[] was properly aligned. (Patch by Curt McDowell.)
1236 2005-12-20 Leon Woestenberg <leon.woestenberg@gmx.net>
1237 * tcp.c: Remove PCBs which stay in LAST_ACK state too long. Patch
1238 submitted by Mitrani Hiroshi.
1240 2005-12-15 Christiaan Simons
1241 * inet.c: Disabled the added summing routine to preserve code space.
1243 2005-12-14 Leon Woestenberg <leon.woestenberg@gmx.net>
1244 * tcp_in.c: Duplicate FIN ACK race condition fix by Kelvin Lawson.
1245 Added Curt McDowell's optimized checksumming routine for future
1246 inclusion. Need to create test case for unaliged, aligned, odd,
1247 even length combination of cases on various endianess machines.
1249 2005-12-09 Christiaan Simons
1250 * inet.c: Rewrote standard checksum routine in proper portable C.
1252 2005-11-25 Christiaan Simons
1253 * udp.c tcp.c: Removed SO_REUSE hack. Should reside in socket code only.
1254 * *.c: introduced cc.h LWIP_DEBUG formatters matching the u16_t, s16_t,
1255 u32_t, s32_t typedefs. This solves most debug word-length assumes.
1257 2005-07-17 Leon Woestenberg <leon.woestenberg@gmx.net>
1258 * inet.c: Fixed unaligned 16-bit access in the standard checksum
1259 routine by Peter Jolasson.
1260 * slipif.c: Fixed implementation assumption of single-pbuf datagrams.
1262 2005-02-04 Leon Woestenberg <leon.woestenberg@gmx.net>
1263 * tcp_out.c: Fixed uninitialized 'queue' referenced in memerr branch.
1264 * tcp_{out|in}.c: Applied patch fixing unaligned access.
1266 2005-01-04 Leon Woestenberg <leon.woestenberg@gmx.net>
1267 * pbuf.c: Fixed missing semicolon after LWIP_DEBUG statement.
1269 2005-01-03 Leon Woestenberg <leon.woestenberg@gmx.net>
1270 * udp.c: UDP pcb->recv() was called even when it was NULL.
1274 2004-12-28 Leon Woestenberg <leon.woestenberg@gmx.net>
1275 * etharp.*: Disabled multiple packets on the ARP queue.
1276 This clashes with TCP queueing.
1278 2004-11-28 Leon Woestenberg <leon.woestenberg@gmx.net>
1279 * etharp.*: Fixed race condition from ARP request to ARP timeout.
1280 Halved the ARP period, doubled the period counts.
1281 ETHARP_MAX_PENDING now should be at least 2. This prevents
1282 the counter from reaching 0 right away (which would allow
1283 too little time for ARP responses to be received).
1285 2004-11-25 Leon Woestenberg <leon.woestenberg@gmx.net>
1286 * dhcp.c: Decline messages were not multicast but unicast.
1287 * etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD.
1288 Do not try hard to insert arbitrary packet's source address,
1289 etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD.
1290 etharp_query() now always DOES call ETHARP_TRY_HARD so that users
1291 querying an address will see it appear in the cache (DHCP could
1292 suffer from this when a server invalidly gave an in-use address.)
1293 * ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are
1294 comparing network addresses (identifiers), not the network masks
1296 * ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given
1297 IP address actually belongs to the network of the given interface.
1299 2004-11-24 Kieran Mansley <kjm25@cam.ac.uk>
1300 * tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state.
1304 2004-10-16 Kieran Mansley <kjm25@cam.ac.uk>
1305 * tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately,
1306 even if one is already pending, if the rcv_wnd is above a threshold
1307 (currently TCP_WND/2). This avoids waiting for a timer to expire to send a
1308 delayed ACK in order to open the window if the stack is only receiving data.
1310 2004-09-12 Kieran Mansley <kjm25@cam.ac.uk>
1311 * tcp*.*: Retransmit time-out handling improvement by Sam Jansen.
1313 2004-08-20 Tony Mountifield <tony@softins.co.uk>
1314 * etharp.c: Make sure the first pbuf queued on an ARP entry
1315 is properly ref counted.
1317 2004-07-27 Tony Mountifield <tony@softins.co.uk>
1318 * debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler
1319 warnings about comparison.
1320 * pbuf.c: Stopped compiler complaining of empty if statement
1321 when LWIP_DEBUGF() empty. Closed an unclosed comment.
1322 * tcp.c: Stopped compiler complaining of empty if statement
1323 when LWIP_DEBUGF() empty.
1324 * ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons().
1325 * inet.c: Added a couple of casts to quiet the compiler.
1326 No need to test isascii(c) before isdigit(c) or isxdigit(c).
1328 2004-07-22 Tony Mountifield <tony@softins.co.uk>
1329 * inet.c: Made data types consistent in inet_ntoa().
1330 Added casts for return values of checksum routines, to pacify compiler.
1331 * ip_frag.c, tcp_out.c, sockets.c, pbuf.c
1332 Small corrections to some debugging statements, to pacify compiler.
1334 2004-07-21 Tony Mountifield <tony@softins.co.uk>
1335 * etharp.c: Removed spurious semicolon and added missing end-of-comment.
1336 * ethernetif.c Updated low_level_output() to match prototype for
1337 netif->linkoutput and changed low_level_input() similarly for consistency.
1338 * api_msg.c: Changed recv_raw() from int to u8_t, to match prototype
1339 of raw_recv() in raw.h and so avoid compiler error.
1340 * sockets.c: Added trivial (int) cast to keep compiler happier.
1341 * ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros.
1347 2004-07-05 Leon Woestenberg <leon.woestenberg@gmx.net>
1348 * sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure
1349 your cc.h file defines this either 1 or 0. If non-defined,
1351 * .c: Added <string.h> and <errno.h> includes where used.
1352 * etharp.c: Made some array indices unsigned.
1354 2004-06-27 Leon Woestenberg <leon.woestenberg@gmx.net>
1355 * netif.*: Added netif_set_up()/down().
1356 * dhcp.c: Changes to restart program flow.
1358 2004-05-07 Leon Woestenberg <leon.woestenberg@gmx.net>
1359 * etharp.c: In find_entry(), instead of a list traversal per candidate, do a
1360 single-pass lookup for different candidates. Should exploit locality.
1362 2004-04-29 Leon Woestenberg <leon.woestenberg@gmx.net>
1363 * tcp*.c: Cleaned up source comment documentation for Doxygen processing.
1364 * opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC.
1365 * etharp.c: update_arp_entry() only adds new ARP entries when adviced to by
1366 the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option.
1370 2004-04-27 Leon Woestenberg <leon.woestenberg@gmx.net>
1371 * etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution
1372 suggested by Timmy Brolin. Fix for 32-bit processors that cannot access
1373 non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix
1374 is to prefix the 14-bit Ethernet headers with two padding bytes.
1376 2004-04-23 Leon Woestenberg <leon.woestenberg@gmx.net>
1377 * ip_addr.c: Fix in the ip_addr_isbroadcast() check.
1378 * etharp.c: Fixed the case where the packet that initiates the ARP request
1379 is not queued, and gets lost. Fixed the case where the packets destination
1380 address is already known; we now always queue the packet and perform an ARP
1387 * Fixed TCP bug for SYN_SENT to ESTABLISHED state transition.
1388 * Fixed TCP bug in dequeueing of FIN from out of order segment queue.
1389 * Fixed two possible NULL references in rare cases.
1395 * Fixed DHCP which did not include the IP address in DECLINE messages.
1399 * etharp.c has been hauled over a bit.
1405 * Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic.
1406 * Packets sent from ARP queue had invalid source hardware address.
1410 * Pass-by ARP requests do now update the cache.
1414 * No longer dependent on ctype.h.
1415 * New socket options.
1416 * Raw IP pcb support.
1422 * Some debug formatters and casts fixed.
1423 * Numereous fixes in PPP.
1427 * DEBUGF now is LWIP_DEBUGF
1428 * pbuf_dechain() has been re-enabled.
1429 * Mentioned the changed use of CVS branches in README.
1435 * Fixed pool pbuf memory leak in pbuf_alloc().
1436 Occured if not enough PBUF_POOL pbufs for a packet pbuf chain.
1437 Reported by Savin Zlobec.
1439 * PBUF_POOL chains had their tot_len field not set for non-first
1440 pbufs. Fixed in pbuf_alloc().
1444 * Added PPP stack contributed by Marc Boucher
1448 * Now drops short packets for ICMP/UDP/TCP protocols. More robust.
1450 * ARP queueuing now queues the latest packet instead of the first.
1451 This is the RFC recommended behaviour, but can be overridden in
1458 * TCP has been fixed to deal with the new use of the pbuf->ref
1461 * DHCP dhcp_inform() crash bug fixed.
1465 * Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed
1466 pbuf_refresh(). This has sped up pbuf pool operations considerably.
1467 Implemented by David Haas.
1473 * The packet buffer implementation has been enhanced to support
1474 zero-copy and copy-on-demand for packet buffers which have their
1475 payloads in application-managed memory.
1476 Implemented by David Haas.
1478 Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy
1479 if an outgoing packet can be directly sent on the link, or perform
1480 a copy-on-demand when necessary.
1482 The application can safely assume the packet is sent, and the RAM
1483 is available to the application directly after calling udp_send()
1484 or similar function.
1488 * ARP_QUEUEING should now correctly work for all cases, including
1490 Implemented by Leon Woestenberg.
1494 * IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer
1495 to a '0.0.0.0' IP address.
1497 * The packet buffer implementation is changed. The pbuf->ref counter
1498 meaning has changed, and several pbuf functions have been
1499 adapted accordingly.
1501 * netif drivers have to be changed to set the hardware address length field
1502 that must be initialized correctly by the driver (hint: 6 for Ethernet MAC).
1503 See the contrib/ports/c16x cs8900 driver as a driver example.
1505 * netif's have a dhcp field that must be initialized to NULL by the driver.
1506 See the contrib/ports/c16x cs8900 driver as a driver example.
1508 (0.5.x) This file has been unmaintained up to 0.6.1. All changes are
1509 logged in CVS but have not been explained here.
1511 (0.5.3) Changes since version 0.5.2
1515 * memp_malloc(MEMP_API_MSG) could fail with multiple application
1516 threads because it wasn't protected by semaphores.
1520 * struct ip_addr now packed.
1522 * The name of the time variable in arp.c has been changed to ctime
1523 to avoid conflicts with the time() function.
1525 (0.5.2) Changes since version 0.5.1
1529 * A new TCP function, tcp_tmr(), now handles both TCP timers.
1533 * A bug in tcp_parseopt() could cause the stack to hang because of a
1534 malformed TCP option.
1536 * The address of new connections in the accept() function in the BSD
1537 socket library was not handled correctly.
1539 * pbuf_dechain() did not update the ->tot_len field of the tail.
1541 * Aborted TCP connections were not handled correctly in all
1546 * All protocol header structs are now packed.
1548 * The ->len field in the tcp_seg structure now counts the actual
1549 amount of data, and does not add one for SYN and FIN segments.
1551 (0.5.1) Changes since version 0.5.0
1555 * Possible to run as a user process under Linux.
1557 * Preliminary support for cross platform packed structs.
1559 * ARP timer now implemented.
1563 * TCP output queue length was badly initialized when opening
1566 * TCP delayed ACKs were not sent correctly.
1568 * Explicit initialization of BSS segment variables.
1570 * read() in BSD socket library could drop data.
1572 * Problems with memory alignment.
1574 * Situations when all TCP buffers were used could lead to
1577 * TCP MSS option wasn't parsed correctly.
1579 * Problems with UDP checksum calculation.
1581 * IP multicast address tests had endianess problems.
1583 * ARP requests had wrong destination hardware address.
1587 * struct eth_addr changed from u16_t[3] array to u8_t[6].
1589 * A ->linkoutput() member was added to struct netif.
1591 * TCP and UDP ->dest_* struct members where changed to ->remote_*.
1593 * ntoh* macros are now null definitions for big endian CPUs.
1595 (0.5.0) Changes since version 0.4.2
1599 * Redesigned operating system emulation layer to make porting easier.
1601 * Better control over TCP output buffers.
1603 * Documenation added.
1607 * Locking issues in buffer management.
1609 * Bugfixes in the sequential API.
1611 * IP forwarding could cause memory leakage. This has been fixed.
1615 * Directory structure somewhat changed; the core/ tree has been
1618 (0.4.2) Changes since version 0.4.1
1622 * Experimental ARP implementation added.
1624 * Skeleton Ethernet driver added.
1626 * Experimental BSD socket API library added.
1630 * In very intense situations, memory leakage could occur. This has
1635 * Variables named "data" and "code" have been renamed in order to
1636 avoid name conflicts in certain compilers.
1638 * Variable++ have in appliciable cases been translated to ++variable
1639 since some compilers generate better code in the latter case.
1641 (0.4.1) Changes since version 0.4
1645 * TCP: Connection attempts time out earlier than data
1646 transmissions. Nagle algorithm implemented. Push flag set on the
1647 last segment in a burst.
1649 * UDP: experimental support for UDP-Lite extensions.
1653 * TCP: out of order segments were in some cases handled incorrectly,
1654 and this has now been fixed. Delayed acknowledgements was broken
1655 in 0.4, has now been fixed. Binding to an address that is in use
1656 now results in an error. Reset connections sometimes hung an
1657 application; this has been fixed.
1659 * Checksum calculation sometimes failed for chained pbufs with odd
1660 lengths. This has been fixed.
1662 * API: a lot of bug fixes in the API. The UDP API has been improved
1663 and tested. Error reporting and handling has been
1664 improved. Logical flaws and race conditions for incoming TCP
1665 connections has been found and removed.
1667 * Memory manager: alignment issues. Reallocating memory sometimes
1668 failed, this has been fixed.
1670 * Generic library: bcopy was flawed and has been fixed.
1674 * API: all datatypes has been changed from generic ones such as
1675 ints, to specified ones such as u16_t. Functions that return
1676 errors now have the correct type (err_t).
1678 * General: A lot of code cleaned up and debugging code removed. Many
1679 portability issues have been fixed.
1681 * The license was changed; the advertising clause was removed.
1685 * Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri
1686 Kosunen, Mikael Caleres, and Frits Wilmink for reporting and
1689 (0.4) Changes since version 0.3.1
1691 * Memory management has been radically changed; instead of
1692 allocating memory from a shared heap, memory for objects that are
1693 rapidly allocated and deallocated is now kept in pools. Allocation
1694 and deallocation from those memory pools is very fast. The shared
1695 heap is still present but is used less frequently.
1697 * The memory, memory pool, and packet buffer subsystems now support
1698 4-, 2-, or 1-byte alignment.
1700 * "Out of memory" situations are handled in a more robust way.
1702 * Stack usage has been reduced.
1704 * Easier configuration of lwIP parameters such as memory usage,
1705 TTLs, statistics gathering, etc. All configuration parameters are
1706 now kept in a single header file "lwipopts.h".
1708 * The directory structure has been changed slightly so that all
1709 architecture specific files are kept under the src/arch
1712 * Error propagation has been improved, both in the protocol modules
1715 * The code for the RTXC architecture has been implemented, tested
1718 * Bugs have been found and corrected in the TCP, UDP, IP, API, and
1719 the Internet checksum modules.
1721 * Bugs related to porting between a 32-bit and a 16-bit architecture
1722 have been found and corrected.
1724 * The license has been changed slightly to conform more with the
1725 original BSD license, including the advertisement clause.
1727 (0.3.1) Changes since version 0.3
1729 * Fix of a fatal bug in the buffer management. Pbufs with allocated
1730 RAM never returned the RAM when the pbuf was deallocated.
1732 * TCP congestion control, window updates and retransmissions did not
1733 work correctly. This has now been fixed.
1735 * Bugfixes in the API.
1737 (0.3) Changes since version 0.2
1739 * New and improved directory structure. All include files are now
1740 kept in a dedicated include/ directory.
1742 * The API now has proper error handling. A new function,
1743 netconn_err(), now returns an error code for the connection in
1746 * Improvements in the memory management subsystem. The system now
1747 keeps a pointer to the lowest free memory block. A new function,
1748 mem_malloc2() tries to allocate memory once, and if it fails tries
1749 to free some memory and retry the allocation.
1751 * Much testing has been done with limited memory
1752 configurations. lwIP now does a better job when overloaded.
1754 * Some bugfixes and improvements to the buffer (pbuf) subsystem.
1756 * Many bugfixes in the TCP code:
1758 - Fixed a bug in tcp_close().
1760 - The TCP receive window was incorrectly closed when out of
1761 sequence segments was received. This has been fixed.
1763 - Connections are now timed-out of the FIN-WAIT-2 state.
1765 - The initial congestion window could in some cases be too
1766 large. This has been fixed.
1768 - The retransmission queue could in some cases be screwed up. This
1771 - TCP RST flag now handled correctly.
1773 - Out of sequence data was in some cases never delivered to the
1774 application. This has been fixed.
1776 - Retransmitted segments now contain the correct acknowledgment
1777 number and advertised window.
1779 - TCP retransmission timeout backoffs are not correctly computed
1780 (ala BSD). After a number of retransmissions, TCP now gives up
1783 * TCP connections now are kept on three lists, one for active
1784 connections, one for listening connections, and one for
1785 connections that are in TIME-WAIT. This greatly speeds up the fast
1786 timeout processing for sending delayed ACKs.
1788 * TCP now provides proper feedback to the application when a
1789 connection has been successfully set up.
1791 * More comments have been added to the code. The code has also been
1792 somewhat cleaned up.
1794 (0.2) Initial public release.