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583 |
jeremybenn |
FUTURE
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* TODO: The lwIP source code makes some invalid assumptions on processor
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word-length, storage sizes and alignment. See the mailing lists for
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problems with exoteric (/DSP) architectures showing these problems.
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We still have to fix some of these issues neatly.
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* TODO: the ARP layer is not protected against concurrent access. If
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you run from a multitasking OS, serialize access to ARP (called from
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your network device driver and from a timeout thread.)
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HISTORY
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(HEAD)
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2004-12-28 Leon Woestenberg
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* etharp.*: Disabled multiple packets on the ARP queue.
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This clashes with TCP queueing.
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2004-11-28 Leon Woestenberg
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* etharp.*: Fixed race condition from ARP request to ARP timeout.
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Halved the ARP period, doubled the period counts.
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ETHARP_MAX_PENDING now should be at least 2. This prevents
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the counter from reaching 0 right away (which would allow
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too little time for ARP responses to be received).
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2004-11-25 Leon Woestenberg
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* dhcp.c: Decline messages were not multicast but unicast.
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* etharp.c: ETHARP_CREATE is renamed to ETHARP_TRY_HARD.
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Do not try hard to insert arbitrary packet's source address,
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etharp_ip_input() now calls etharp_update() without ETHARP_TRY_HARD.
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etharp_query() now always DOES call ETHARP_TRY_HARD so that users
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querying an address will see it appear in the cache (DHCP could
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suffer from this when a server invalidly gave an in-use address.)
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* ipv4/ip_addr.h: Renamed ip_addr_maskcmp() to _netcmp() as we are
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comparing network addresses (identifiers), not the network masks
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themselves.
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* ipv4/ip_addr.c: ip_addr_isbroadcast() now checks that the given
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IP address actually belongs to the network of the given interface.
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2004-11-24 Kieran Mansley
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* tcp.c: Increment pcb->snd_buf when ACK is received in SYN_SENT state.
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(STABLE-1_1_0-RC1)
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2004-10-16 Kieran Mansley
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* tcp.c: Add code to tcp_recved() to send an ACK (window update) immediately,
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even if one is already pending, if the rcv_wnd is above a threshold
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(currently TCP_WND/2). This avoids waiting for a timer to expire to send a
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delayed ACK in order to open the window if the stack is only receiving data.
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2004-09-12 Kieran Mansley
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* tcp*.*: Retransmit time-out handling improvement by Sam Jansen.
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2004-08-20 Tony Mountifield
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* etharp.c: Make sure the first pbuf queued on an ARP entry
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is properly ref counted.
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2004-07-27 Tony Mountifield
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* debug.h: Added (int) cast in LWIP_DEBUGF() to avoid compiler
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warnings about comparison.
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* pbuf.c: Stopped compiler complaining of empty if statement
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when LWIP_DEBUGF() empty. Closed an unclosed comment.
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* tcp.c: Stopped compiler complaining of empty if statement
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when LWIP_DEBUGF() empty.
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* ip.h Corrected IPH_TOS() macro: returns a byte, so doesn't need htons().
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* inet.c: Added a couple of casts to quiet the compiler.
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No need to test isascii(c) before isdigit(c) or isxdigit(c).
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2004-07-22 Tony Mountifield
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* inet.c: Made data types consistent in inet_ntoa().
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Added casts for return values of checksum routines, to pacify compiler.
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* ip_frag.c, tcp_out.c, sockets.c, pbuf.c
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Small corrections to some debugging statements, to pacify compiler.
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2004-07-21 Tony Mountifield
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* etharp.c: Removed spurious semicolon and added missing end-of-comment.
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* ethernetif.c Updated low_level_output() to match prototype for
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netif->linkoutput and changed low_level_input() similarly for consistency.
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* api_msg.c: Changed recv_raw() from int to u8_t, to match prototype
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of raw_recv() in raw.h and so avoid compiler error.
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* sockets.c: Added trivial (int) cast to keep compiler happier.
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* ip.c, netif.c Changed debug statements to use the tidier ip4_addrN() macros.
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(STABLE-1_0_0)
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++ Changes:
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2004-07-05 Leon Woestenberg
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* sockets.*: Restructured LWIP_PRIVATE_TIMEVAL. Make sure
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your cc.h file defines this either 1 or 0. If non-defined,
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defaults to 1.
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* .c: Added and includes where used.
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* etharp.c: Made some array indices unsigned.
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2004-06-27 Leon Woestenberg
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* netif.*: Added netif_set_up()/down().
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* dhcp.c: Changes to restart program flow.
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2004-05-07 Leon Woestenberg
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* etharp.c: In find_entry(), instead of a list traversal per candidate, do a
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single-pass lookup for different candidates. Should exploit locality.
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2004-04-29 Leon Woestenberg
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* tcp*.c: Cleaned up source comment documentation for Doxygen processing.
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* opt.h: ETHARP_ALWAYS_INSERT option removed to comply with ARP RFC.
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* etharp.c: update_arp_entry() only adds new ARP entries when adviced to by
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the caller. This deprecates the ETHARP_ALWAYS_INSERT overrule option.
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++ Bug fixes:
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2004-04-27 Leon Woestenberg
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* etharp.c: Applied patch of bug #8708 by Toni Mountifield with a solution
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suggested by Timmy Brolin. Fix for 32-bit processors that cannot access
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non-aligned 32-bit words, such as soms 32-bit TCP/IP header fields. Fix
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is to prefix the 14-bit Ethernet headers with two padding bytes.
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2004-04-23 Leon Woestenberg
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* ip_addr.c: Fix in the ip_addr_isbroadcast() check.
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* etharp.c: Fixed the case where the packet that initiates the ARP request
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is not queued, and gets lost. Fixed the case where the packets destination
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address is already known; we now always queue the packet and perform an ARP
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request.
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(STABLE-0_7_0)
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++ Bug fixes:
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* Fixed TCP bug for SYN_SENT to ESTABLISHED state transition.
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* Fixed TCP bug in dequeueing of FIN from out of order segment queue.
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* Fixed two possible NULL references in rare cases.
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(STABLE-0_6_6)
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++ Bug fixes:
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* Fixed DHCP which did not include the IP address in DECLINE messages.
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++ Changes:
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* etharp.c has been hauled over a bit.
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(STABLE-0_6_5)
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++ Bug fixes:
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* Fixed TCP bug induced by bad window resizing with unidirectional TCP traffic.
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* Packets sent from ARP queue had invalid source hardware address.
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++ Changes:
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* Pass-by ARP requests do now update the cache.
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++ New features:
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* No longer dependent on ctype.h.
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* New socket options.
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* Raw IP pcb support.
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(STABLE-0_6_4)
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++ Bug fixes:
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* Some debug formatters and casts fixed.
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* Numereous fixes in PPP.
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++ Changes:
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* DEBUGF now is LWIP_DEBUGF
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* pbuf_dechain() has been re-enabled.
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* Mentioned the changed use of CVS branches in README.
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(STABLE-0_6_3)
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++ Bug fixes:
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* Fixed pool pbuf memory leak in pbuf_alloc().
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Occured if not enough PBUF_POOL pbufs for a packet pbuf chain.
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Reported by Savin Zlobec.
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* PBUF_POOL chains had their tot_len field not set for non-first
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pbufs. Fixed in pbuf_alloc().
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++ New features:
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* Added PPP stack contributed by Marc Boucher
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++ Changes:
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* Now drops short packets for ICMP/UDP/TCP protocols. More robust.
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* ARP queueuing now queues the latest packet instead of the first.
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This is the RFC recommended behaviour, but can be overridden in
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lwipopts.h.
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(0.6.2)
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++ Bugfixes:
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* TCP has been fixed to deal with the new use of the pbuf->ref
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counter.
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* DHCP dhcp_inform() crash bug fixed.
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++ Changes:
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* Removed pbuf_pool_free_cache and pbuf_pool_alloc_cache. Also removed
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pbuf_refresh(). This has sped up pbuf pool operations considerably.
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Implemented by David Haas.
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(0.6.1)
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++ New features:
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* The packet buffer implementation has been enhanced to support
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zero-copy and copy-on-demand for packet buffers which have their
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payloads in application-managed memory.
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Implemented by David Haas.
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Use PBUF_REF to make a pbuf refer to RAM. lwIP will use zero-copy
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if an outgoing packet can be directly sent on the link, or perform
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a copy-on-demand when necessary.
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The application can safely assume the packet is sent, and the RAM
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is available to the application directly after calling udp_send()
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or similar function.
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++ Bugfixes:
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* ARP_QUEUEING should now correctly work for all cases, including
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PBUF_REF.
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Implemented by Leon Woestenberg.
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++ Changes:
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* IP_ADDR_ANY is no longer a NULL pointer. Instead, it is a pointer
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to a '0.0.0.0' IP address.
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* The packet buffer implementation is changed. The pbuf->ref counter
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meaning has changed, and several pbuf functions have been
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adapted accordingly.
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* netif drivers have to be changed to set the hardware address length field
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that must be initialized correctly by the driver (hint: 6 for Ethernet MAC).
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See the contrib/ports/c16x cs8900 driver as a driver example.
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* netif's have a dhcp field that must be initialized to NULL by the driver.
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See the contrib/ports/c16x cs8900 driver as a driver example.
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(0.5.x) This file has been unmaintained up to 0.6.1. All changes are
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logged in CVS but have not been explained here.
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(0.5.3) Changes since version 0.5.2
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++ Bugfixes:
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* memp_malloc(MEMP_API_MSG) could fail with multiple application
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threads because it wasn't protected by semaphores.
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++ Other changes:
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* struct ip_addr now packed.
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* The name of the time variable in arp.c has been changed to ctime
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to avoid conflicts with the time() function.
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(0.5.2) Changes since version 0.5.1
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++ New features:
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* A new TCP function, tcp_tmr(), now handles both TCP timers.
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++ Bugfixes:
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* A bug in tcp_parseopt() could cause the stack to hang because of a
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malformed TCP option.
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* The address of new connections in the accept() function in the BSD
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socket library was not handled correctly.
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* pbuf_dechain() did not update the ->tot_len field of the tail.
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* Aborted TCP connections were not handled correctly in all
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situations.
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++ Other changes:
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* All protocol header structs are now packed.
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* The ->len field in the tcp_seg structure now counts the actual
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amount of data, and does not add one for SYN and FIN segments.
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(0.5.1) Changes since version 0.5.0
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++ New features:
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* Possible to run as a user process under Linux.
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* Preliminary support for cross platform packed structs.
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* ARP timer now implemented.
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++ Bugfixes:
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* TCP output queue length was badly initialized when opening
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connections.
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* TCP delayed ACKs were not sent correctly.
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* Explicit initialization of BSS segment variables.
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* read() in BSD socket library could drop data.
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* Problems with memory alignment.
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* Situations when all TCP buffers were used could lead to
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starvation.
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* TCP MSS option wasn't parsed correctly.
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* Problems with UDP checksum calculation.
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* IP multicast address tests had endianess problems.
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* ARP requests had wrong destination hardware address.
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++ Other changes:
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* struct eth_addr changed from u16_t[3] array to u8_t[6].
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* A ->linkoutput() member was added to struct netif.
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* TCP and UDP ->dest_* struct members where changed to ->remote_*.
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* ntoh* macros are now null definitions for big endian CPUs.
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(0.5.0) Changes since version 0.4.2
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++ New features:
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* Redesigned operating system emulation layer to make porting easier.
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* Better control over TCP output buffers.
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* Documenation added.
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++ Bugfixes:
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* Locking issues in buffer management.
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* Bugfixes in the sequential API.
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* IP forwarding could cause memory leakage. This has been fixed.
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++ Other changes:
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* Directory structure somewhat changed; the core/ tree has been
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collapsed.
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(0.4.2) Changes since version 0.4.1
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361 |
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362 |
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++ New features:
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* Experimental ARP implementation added.
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* Skeleton Ethernet driver added.
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* Experimental BSD socket API library added.
|
369 |
|
|
|
370 |
|
|
++ Bugfixes:
|
371 |
|
|
|
372 |
|
|
* In very intense situations, memory leakage could occur. This has
|
373 |
|
|
been fixed.
|
374 |
|
|
|
375 |
|
|
++ Other changes:
|
376 |
|
|
|
377 |
|
|
* Variables named "data" and "code" have been renamed in order to
|
378 |
|
|
avoid name conflicts in certain compilers.
|
379 |
|
|
|
380 |
|
|
* Variable++ have in appliciable cases been translated to ++variable
|
381 |
|
|
since some compilers generate better code in the latter case.
|
382 |
|
|
|
383 |
|
|
(0.4.1) Changes since version 0.4
|
384 |
|
|
|
385 |
|
|
++ New features:
|
386 |
|
|
|
387 |
|
|
* TCP: Connection attempts time out earlier than data
|
388 |
|
|
transmissions. Nagle algorithm implemented. Push flag set on the
|
389 |
|
|
last segment in a burst.
|
390 |
|
|
|
391 |
|
|
* UDP: experimental support for UDP-Lite extensions.
|
392 |
|
|
|
393 |
|
|
++ Bugfixes:
|
394 |
|
|
|
395 |
|
|
* TCP: out of order segments were in some cases handled incorrectly,
|
396 |
|
|
and this has now been fixed. Delayed acknowledgements was broken
|
397 |
|
|
in 0.4, has now been fixed. Binding to an address that is in use
|
398 |
|
|
now results in an error. Reset connections sometimes hung an
|
399 |
|
|
application; this has been fixed.
|
400 |
|
|
|
401 |
|
|
* Checksum calculation sometimes failed for chained pbufs with odd
|
402 |
|
|
lengths. This has been fixed.
|
403 |
|
|
|
404 |
|
|
* API: a lot of bug fixes in the API. The UDP API has been improved
|
405 |
|
|
and tested. Error reporting and handling has been
|
406 |
|
|
improved. Logical flaws and race conditions for incoming TCP
|
407 |
|
|
connections has been found and removed.
|
408 |
|
|
|
409 |
|
|
* Memory manager: alignment issues. Reallocating memory sometimes
|
410 |
|
|
failed, this has been fixed.
|
411 |
|
|
|
412 |
|
|
* Generic library: bcopy was flawed and has been fixed.
|
413 |
|
|
|
414 |
|
|
++ Other changes:
|
415 |
|
|
|
416 |
|
|
* API: all datatypes has been changed from generic ones such as
|
417 |
|
|
ints, to specified ones such as u16_t. Functions that return
|
418 |
|
|
errors now have the correct type (err_t).
|
419 |
|
|
|
420 |
|
|
* General: A lot of code cleaned up and debugging code removed. Many
|
421 |
|
|
portability issues have been fixed.
|
422 |
|
|
|
423 |
|
|
* The license was changed; the advertising clause was removed.
|
424 |
|
|
|
425 |
|
|
* C64 port added.
|
426 |
|
|
|
427 |
|
|
* Thanks: Huge thanks go to Dagan Galarneau, Horst Garnetzke, Petri
|
428 |
|
|
Kosunen, Mikael Caleres, and Frits Wilmink for reporting and
|
429 |
|
|
fixing bugs!
|
430 |
|
|
|
431 |
|
|
(0.4) Changes since version 0.3.1
|
432 |
|
|
|
433 |
|
|
* Memory management has been radically changed; instead of
|
434 |
|
|
allocating memory from a shared heap, memory for objects that are
|
435 |
|
|
rapidly allocated and deallocated is now kept in pools. Allocation
|
436 |
|
|
and deallocation from those memory pools is very fast. The shared
|
437 |
|
|
heap is still present but is used less frequently.
|
438 |
|
|
|
439 |
|
|
* The memory, memory pool, and packet buffer subsystems now support
|
440 |
|
|
4-, 2-, or 1-byte alignment.
|
441 |
|
|
|
442 |
|
|
* "Out of memory" situations are handled in a more robust way.
|
443 |
|
|
|
444 |
|
|
* Stack usage has been reduced.
|
445 |
|
|
|
446 |
|
|
* Easier configuration of lwIP parameters such as memory usage,
|
447 |
|
|
TTLs, statistics gathering, etc. All configuration parameters are
|
448 |
|
|
now kept in a single header file "lwipopts.h".
|
449 |
|
|
|
450 |
|
|
* The directory structure has been changed slightly so that all
|
451 |
|
|
architecture specific files are kept under the src/arch
|
452 |
|
|
hierarchy.
|
453 |
|
|
|
454 |
|
|
* Error propagation has been improved, both in the protocol modules
|
455 |
|
|
and in the API.
|
456 |
|
|
|
457 |
|
|
* The code for the RTXC architecture has been implemented, tested
|
458 |
|
|
and put to use.
|
459 |
|
|
|
460 |
|
|
* Bugs have been found and corrected in the TCP, UDP, IP, API, and
|
461 |
|
|
the Internet checksum modules.
|
462 |
|
|
|
463 |
|
|
* Bugs related to porting between a 32-bit and a 16-bit architecture
|
464 |
|
|
have been found and corrected.
|
465 |
|
|
|
466 |
|
|
* The license has been changed slightly to conform more with the
|
467 |
|
|
original BSD license, including the advertisement clause.
|
468 |
|
|
|
469 |
|
|
(0.3.1) Changes since version 0.3
|
470 |
|
|
|
471 |
|
|
* Fix of a fatal bug in the buffer management. Pbufs with allocated
|
472 |
|
|
RAM never returned the RAM when the pbuf was deallocated.
|
473 |
|
|
|
474 |
|
|
* TCP congestion control, window updates and retransmissions did not
|
475 |
|
|
work correctly. This has now been fixed.
|
476 |
|
|
|
477 |
|
|
* Bugfixes in the API.
|
478 |
|
|
|
479 |
|
|
(0.3) Changes since version 0.2
|
480 |
|
|
|
481 |
|
|
* New and improved directory structure. All include files are now
|
482 |
|
|
kept in a dedicated include/ directory.
|
483 |
|
|
|
484 |
|
|
* The API now has proper error handling. A new function,
|
485 |
|
|
netconn_err(), now returns an error code for the connection in
|
486 |
|
|
case of errors.
|
487 |
|
|
|
488 |
|
|
* Improvements in the memory management subsystem. The system now
|
489 |
|
|
keeps a pointer to the lowest free memory block. A new function,
|
490 |
|
|
mem_malloc2() tries to allocate memory once, and if it fails tries
|
491 |
|
|
to free some memory and retry the allocation.
|
492 |
|
|
|
493 |
|
|
* Much testing has been done with limited memory
|
494 |
|
|
configurations. lwIP now does a better job when overloaded.
|
495 |
|
|
|
496 |
|
|
* Some bugfixes and improvements to the buffer (pbuf) subsystem.
|
497 |
|
|
|
498 |
|
|
* Many bugfixes in the TCP code:
|
499 |
|
|
|
500 |
|
|
- Fixed a bug in tcp_close().
|
501 |
|
|
|
502 |
|
|
- The TCP receive window was incorrectly closed when out of
|
503 |
|
|
sequence segments was received. This has been fixed.
|
504 |
|
|
|
505 |
|
|
- Connections are now timed-out of the FIN-WAIT-2 state.
|
506 |
|
|
|
507 |
|
|
- The initial congestion window could in some cases be too
|
508 |
|
|
large. This has been fixed.
|
509 |
|
|
|
510 |
|
|
- The retransmission queue could in some cases be screwed up. This
|
511 |
|
|
has been fixed.
|
512 |
|
|
|
513 |
|
|
- TCP RST flag now handled correctly.
|
514 |
|
|
|
515 |
|
|
- Out of sequence data was in some cases never delivered to the
|
516 |
|
|
application. This has been fixed.
|
517 |
|
|
|
518 |
|
|
- Retransmitted segments now contain the correct acknowledgment
|
519 |
|
|
number and advertised window.
|
520 |
|
|
|
521 |
|
|
- TCP retransmission timeout backoffs are not correctly computed
|
522 |
|
|
(ala BSD). After a number of retransmissions, TCP now gives up
|
523 |
|
|
the connection.
|
524 |
|
|
|
525 |
|
|
* TCP connections now are kept on three lists, one for active
|
526 |
|
|
connections, one for listening connections, and one for
|
527 |
|
|
connections that are in TIME-WAIT. This greatly speeds up the fast
|
528 |
|
|
timeout processing for sending delayed ACKs.
|
529 |
|
|
|
530 |
|
|
* TCP now provides proper feedback to the application when a
|
531 |
|
|
connection has been successfully set up.
|
532 |
|
|
|
533 |
|
|
* More comments have been added to the code. The code has also been
|
534 |
|
|
somewhat cleaned up.
|
535 |
|
|
|
536 |
|
|
(0.2) Initial public release.
|