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
9 * [Enter new changes just after this line - do not remove this line]
11 ++ Application changes:
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).
16 * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc()
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() - this means
22 that it also does not get the NULL-pbuf which tells it the remote side has
25 * When calling tcp_abort() from a raw API TCP callback function,
26 make sure you return ERR_ABRT to prevent accessing unallocated memory.
27 (ERR_ABRT now means the applicaiton has called tcp_abort!)
30 * Changed netconn_receive() and netconn_accept() to return
31 err_t, not a pointer to new data/netconn.
34 * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they
35 now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT.
37 * Added a minimal version of posix fctl() to have a
38 standardised way to set O_NONBLOCK for nonblocking sockets.
41 * correctly implemented SO(F)_REUSEADDR
47 * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h:
49 * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains
50 the actual application programmer's API
52 * Separated timer implementation from sys.h/.c, moved to timers.h/.c;
53 Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you
54 still want to use your own timer implementation for NO_SYS==0 (as before).
58 * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/
61 * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
63 * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use
64 binary semaphores instead of mutexes - as before)
68 * Don't waste memory when chaining segments, added option TCP_OVERSIZE to
69 prevent creating many small pbufs when calling tcp_write with many small
70 blocks of data. Instead, pbufs are allocated larger than needed and the
71 space is used for later calls to tcp_write.
73 * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs
74 in tcp_write/udp_send.
76 * Added an additional option LWIP_ETHERNET to support ethernet without ARP
77 (necessary for pure PPPoE)
79 * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may
80 be used to place these pools into user-defined memory by using external
83 * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT
87 * Netdb uses a memp pool for allocating memory when getaddrinfo() is called,
88 so MEMP_NUM_NETDB has to be set accordingly.
90 * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so
91 MEMP_NUM_LOCALHOSTLIST has to be set accordingly.
93 * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have
94 to be set accordingly.
96 * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES
97 has to be set accordingly
99 * Integrated loopif into netif.c - loopif does not have to be created by the
100 port any more, just define LWIP_HAVE_LOOPIF to 1.
102 * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined
103 in cc.h, e.g. used by igmp)
105 * Added printf-formatter X8_F to printf u8_t as hex
107 * The heap now may be moved to user-defined memory by defining
108 LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
110 * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work
111 with user-allocated structs instead of calling mem_malloc
113 * Added const char* name to mem- and memp-stats for easier debugging.
115 * Calculate the TCP/UDP checksum while copying to only fetch data once:
116 Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum
118 * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to
121 ++ Major bugfixes/improvements
123 * Implemented tcp_shutdown() to only shut down one end of a connection
124 * Implemented shutdown() at socket- and netconn-level
125 * Added errorset support to select() + improved select speed overhead
126 * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x)
127 * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1
128 * Use macros defined in ip_addr.h to work with IP addresses
129 * Implemented many nonblocking socket/netconn functions
130 * Fixed ARP input processing: only add a new entry if a request was directed as us
131 * mem_realloc() to mem_trim() to prevent confusion with realloc()
132 * Some improvements for AutoIP (don't route/forward link-local addresses, don't break
133 existing connections when assigning a routable address)
134 * Correctly handle remote side overrunning our rcv_wnd in ooseq case
135 * Removed packing from ip_addr_t, the packed version is now only used in protocol headers
136 * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0
137 * Added support for static ARP table entries
141 * initial version of this file