1 This file lists major changes between release versions that require 2 ports or applications to be changed. Use it to update a port or an 3 application written for an older version of lwIP to correctly work 4 with newer versions. 5 6 7 (CVS HEAD) 8 9 * [Enter new changes just after this line - do not remove this line] 10 11 ++ Application changes: 12 13 * Replaced struct ip_addr by typedef ip_addr_t (struct ip_addr is kept for 14 compatibility to old applications, but will be removed in the future). 15 16 * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc() 17 18 +++ Raw API: 19 * Changed the semantics of tcp_close() (since it was rather a 20 shutdown before): Now the application does *NOT* get any calls to the recv 21 callback (aside from NULL/closed) after calling tcp_close() 22 23 * When calling tcp_abort() from a raw API TCP callback function, 24 make sure you return ERR_ABRT to prevent accessing unallocated memory. 25 (ERR_ABRT now means the applicaiton has called tcp_abort!) 26 27 +++ Netconn API: 28 * Changed netconn_receive() and netconn_accept() to return 29 err_t, not a pointer to new data/netconn. 30 31 +++ Socket API: 32 * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they 33 now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT. 34 35 * Added a minimal version of posix fctl() to have a 36 standardised way to set O_NONBLOCK for nonblocking sockets. 37 38 +++ all APIs: 39 * correctly implemented SO(F)_REUSEADDR 40 41 ++ Port changes 42 43 +++ new files: 44 45 * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h: 46 47 * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains 48 the actual application programmer's API 49 50 * Separated timer implementation from sys.h/.c, moved to timers.h/.c; 51 Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you 52 still want to use your own timer implementation for NO_SYS==0 (as before). 53 54 +++ sys layer: 55 56 * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/ 57 sys_sem_t; 58 59 * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t; 60 61 * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use 62 binary semaphores instead of mutexes - as before) 63 64 +++ new options: 65 66 * Don't waste memory when chaining segments, added option TCP_OVERSIZE to 67 prevent creating many small pbufs when calling tcp_write with many small 68 blocks of data. Instead, pbufs are allocated larger than needed and the 69 space is used for later calls to tcp_write. 70 71 * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs 72 in tcp_write/udp_send. 73 74 * Added an additional option LWIP_ETHERNET to support ethernet without ARP 75 (necessary for pure PPPoE) 76 77 * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may 78 be used to place these pools into user-defined memory by using external 79 declaration. 80 81 * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT 82 83 +++ new pools: 84 85 * Netdb uses a memp pool for allocating memory when getaddrinfo() is called, 86 so MEMP_NUM_NETDB has to be set accordingly. 87 88 * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so 89 MEMP_NUM_LOCALHOSTLIST has to be set accordingly. 90 91 * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have 92 to be set accordingly. 93 94 * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES 95 has to be set accordingly 96 97 * Integrated loopif into netif.c - loopif does not have to be created by the 98 port any more, just define LWIP_HAVE_LOOPIF to 1. 99 100 * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined 101 in cc.h, e.g. used by igmp) 102 103 * Added printf-formatter X8_F to printf u8_t as hex 104 105 * The heap now may be moved to user-defined memory by defining 106 LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address 107 108 * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work 109 with user-allocated structs instead of calling mem_malloc 110 111 * Added const char* name to mem- and memp-stats for easier debugging. 112 113 * Calculate the TCP/UDP checksum while copying to only fetch data once: 114 Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum 115 116 * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to 117 more than one pcb. 118 119 * Changed the semantics of ARP_QUEUEING==0: ARP_QUEUEING now cannot be turned 120 off any more, if this is set to 0, only one packet (the most recent one) is 121 queued (like demanded by RFC 1122). 122 123 124 ++ Major bugfixes/improvements 125 126 * Implemented tcp_shutdown() to only shut down one end of a connection 127 * Implemented shutdown() at socket- and netconn-level 128 * Added errorset support to select() + improved select speed overhead 129 * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x) 130 * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1 131 * Use macros defined in ip_addr.h to work with IP addresses 132 * Implemented many nonblocking socket/netconn functions 133 * Fixed ARP input processing: only add a new entry if a request was directed as us 134 * mem_realloc() to mem_trim() to prevent confusion with realloc() 135 * Some improvements for AutoIP (don't route/forward link-local addresses, don't break 136 existing connections when assigning a routable address) 137 * Correctly handle remote side overrunning our rcv_wnd in ooseq case 138 * Removed packing from ip_addr_t, the packed version is now only used in protocol headers 139 * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0 140 * Added support for static ARP table entries 141 142 (STABLE-1.3.2) 143 144 * initial version of this file 145
