| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235 | This file lists major changes between release versions that requireports or applications to be changed. Use it to update a port or anapplication written for an older version of lwIP to correctly workwith newer versions.(git master)  * [Enter new changes just after this line - do not remove this line](2.0.1)  ++ Application changes:  * UDP does NOT receive multicast traffic from ALL netifs on an UDP PCB bound to a specific    netif any more. Users need to bind to IP_ADDR_ANY to receive multicast traffic and compare     ip_current_netif() to the desired netif for every packet.    See bug #49662 for an explanation.(2.0.0)  ++ Application changes:  * Changed netif "up" flag handling to be an administrative flag (as opposed to the previous meaning of    "ip4-address-valid", a netif will now not be used for transmission if not up) -> even a DHCP netif    has to be set "up" before starting the DHCP client  * Added IPv6 support (dual-stack or IPv4/IPv6 only)  * Changed ip_addr_t to be a union in dual-stack mode (use ip4_addr_t where referring to IPv4 only).  * Major rewrite of SNMP (added MIB parser that creates code stubs for custom MIBs);    supports SNMPv2c (experimental v3 support)  * Moved some core applications from contrib repository to src/apps (and include/lwip/apps)  +++ Raw API:    * Changed TCP listen backlog: removed tcp_accepted(), added the function pair tcp_backlog_delayed()/      tcp_backlog_accepted() to explicitly delay backlog handling on a connection pcb  +++ Socket API:    * Added an implementation for posix sendmsg()    * Added LWIP_FIONREAD_LINUXMODE that makes ioctl/FIONREAD return the size of the next pending datagram  ++ Port changes  +++ new files:    * MANY new and moved files!     * Added src/Filelists.mk for use in Makefile projects    * Continued moving stack-internal parts from abc.h to abc_priv.h in sub-folder "priv"      to let abc.h only contain the actual application programmer's API  +++ sys layer:    * Made LWIP_TCPIP_CORE_LOCKING==1 the default as it usually performs better than      the traditional message passing (although with LWIP_COMPAT_MUTEX you are still      open to priority inversion, so this is not recommended any more)    * Added LWIP_NETCONN_SEM_PER_THREAD to use one "op_completed" semaphore per thread      instead of using one per netconn (these semaphores are used even with core locking      enabled as some longer lasting functions like big writes still need to delay)    * Added generalized abstraction for itoa(), strnicmp(), stricmp() and strnstr()      in def.h (to be overridden in cc.h) instead of config       options for netbiosns, httpd, dns, etc. ...    * New abstraction for hton* and ntoh* functions in def.h.      To override them, use the following in cc.h:       #define lwip_htons(x) <your_htons>      #define lwip_htonl(x) <your_htonl>  +++ new options:     * TODO  +++ new pools:     * Added LWIP_MEMPOOL_* (declare/init/alloc/free) to declare private memp pools       that share memp.c code but do not have to be made global via lwippools.h     * Added pools for IPv6, MPU_COMPATIBLE, dns-api, netif-api, etc.     * added hook LWIP_HOOK_MEMP_AVAILABLE() to get informed when a memp pool was empty and an item       is now available  * Signature of LWIP_HOOK_VLAN_SET macro was changed  * LWIP_DECLARE_MEMORY_ALIGNED() may be used to declare aligned memory buffers (mem/memp)    or to move buffers to dedicated memory using compiler attributes  * Standard C headers are used to define sized types and printf formatters    (disable by setting LWIP_NO_STDINT_H=1 or LWIP_NO_INTTYPES_H=1 if your compiler    does not support these)  ++ Major bugfixes/improvements  * Added IPv6 support (dual-stack or IPv4/IPv6 only)  * Major rewrite of PPP (incl. keep-up with apache pppd)    see doc/ppp.txt for an upgrading how-to  * Major rewrite of SNMP (incl. MIB parser)  * Fixed timing issues that might have lead to losing a DHCP lease  * Made rx processing path more robust against crafted errors  * TCP window scaling support  * modification of api modules to support FreeRTOS-MPU (don't pass stack-pointers to other threads)  * made DNS client more robust  * support PBUF_REF for RX packets  * LWIP_NETCONN_FULLDUPLEX allows netconn/sockets to be used for reading/writing from separate    threads each (needs LWIP_NETCONN_SEM_PER_THREAD)  * Moved and reordered stats (mainly memp/mib2)(1.4.0)  ++ Application changes:  * Replaced struct ip_addr by typedef ip_addr_t (struct ip_addr is kept for    compatibility to old applications, but will be removed in the future).  * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc()  +++ Raw API:    * Changed the semantics of tcp_close() (since it was rather a      shutdown before): Now the application does *NOT* get any calls to the recv      callback (aside from NULL/closed) after calling tcp_close()    * When calling tcp_abort() from a raw API TCP callback function,      make sure you return ERR_ABRT to prevent accessing unallocated memory.      (ERR_ABRT now means the applicaiton has called tcp_abort!)  +++ Netconn API:    * Changed netconn_receive() and netconn_accept() to return      err_t, not a pointer to new data/netconn.  +++ Socket API:    * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they      now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT.    * Added a minimal version of posix fctl() to have a      standardised way to set O_NONBLOCK for nonblocking sockets.  +++ all APIs:    * correctly implemented SO(F)_REUSEADDR  ++ Port changes  +++ new files:    * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h:    * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains      the actual application programmer's API      * Separated timer implementation from sys.h/.c, moved to timers.h/.c;      Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you      still want to use your own timer implementation for NO_SYS==0 (as before).  +++ sys layer:    * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/      sys_sem_t;    * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t;    * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use      binary semaphores instead of mutexes - as before)  +++ new options:     * Don't waste memory when chaining segments, added option TCP_OVERSIZE to       prevent creating many small pbufs when calling tcp_write with many small       blocks of data. Instead, pbufs are allocated larger than needed and the       space is used for later calls to tcp_write.     * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs       in tcp_write/udp_send.    * Added an additional option LWIP_ETHERNET to support ethernet without ARP      (necessary for pure PPPoE)    * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may      be used to place these pools into user-defined memory by using external      declaration.    * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT  +++ new pools:     * Netdb uses a memp pool for allocating memory when getaddrinfo() is called,       so MEMP_NUM_NETDB has to be set accordingly.     * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so       MEMP_NUM_LOCALHOSTLIST has to be set accordingly.     * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have       to be set accordingly.     * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES       has to be set accordingly  * Integrated loopif into netif.c - loopif does not have to be created by the    port any more, just define LWIP_HAVE_LOOPIF to 1.  * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined    in cc.h, e.g. used by igmp)  * Added printf-formatter X8_F to printf u8_t as hex  * The heap now may be moved to user-defined memory by defining    LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address  * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work    with user-allocated structs instead of calling mem_malloc  * Added const char* name to mem- and memp-stats for easier debugging.  * Calculate the TCP/UDP checksum while copying to only fetch data once:    Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum  * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to    more than one pcb.  * Changed the semantics of ARP_QUEUEING==0: ARP_QUEUEING now cannot be turned    off any more, if this is set to 0, only one packet (the most recent one) is    queued (like demanded by RFC 1122).    ++ Major bugfixes/improvements  * Implemented tcp_shutdown() to only shut down one end of a connection  * Implemented shutdown() at socket- and netconn-level  * Added errorset support to select() + improved select speed overhead  * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x)  * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1  * Use macros defined in ip_addr.h to work with IP addresses  * Implemented many nonblocking socket/netconn functions  * Fixed ARP input processing: only add a new entry if a request was directed as us  * mem_realloc() to mem_trim() to prevent confusion with realloc()  * Some improvements for AutoIP (don't route/forward link-local addresses, don't break    existing connections when assigning a routable address)  * Correctly handle remote side overrunning our rcv_wnd in ooseq case  * Removed packing from ip_addr_t, the packed version is now only used in protocol headers  * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0  * Added support for static ARP table entries(STABLE-1.3.2)  * initial version of this file
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