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