File: UPGRADING

package info (click to toggle)
lwip 2.1.2+dfsg1-8
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 7,036 kB
  • sloc: ansic: 89,574; perl: 81; sh: 28; makefile: 18
file content (278 lines) | stat: -rw-r--r-- 12,623 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
This file lists major changes between release versions that require
ports or applications to be changed. Use it to update a port or an
application written for an older version of lwIP to correctly work
with newer versions.


(git master)

  * [Enter new changes just after this line - do not remove this line]

(2.1.0)

  ++ Application changes:

  * Use the new altcp API for seamless TLS integration into existing TCP applications (see changelog)
  * TCP only kills existing connections with a LOWER priority than the one currently being opened.
    Previous implementations also kill existing connections of the SAME priority.
  * ip4_route_src: parameter order is reversed: ip4_route_src(dest, src) -> ip4_route_src(src, dest)
    to make parameter order consistent with other ip*_route*() functions.
    Same also applies to LWIP_HOOK_IP4_ROUTE_SRC() parameter order.
  * pbuf API: pbuf->type (an u8_t holding the enum 'pbuf_type') has changed to only hold a
    description of the pbuf (e.g. data following pbuf struct, data volatile, allocation
    source heap/pool/etc.). As a consequence, applications can't test pbuf->type any more.
    Use pbuf_match_type(pbuf, type) instead.
  * socket API: according to the standard, SO_ERROR now only returns asynchronous errors.
    All other/normal/synchronous errors are (and always were) available via 'errno'.
    LWIP_SOCKET_SET_ERRNO has been removed - 'errno' is always set - and required!
  * httpd LWIP_HTTPD_CGI_SSI: httpd_cgi_handler() has an additional parameter "struct fs_file *"

  ++ Port changes:

  * tcpip_trycallback() was renamed to tcpip_callbackmsg_trycallback() to avoid confusion
    with tcpip_try_callback()
  * compatibility headers: moved from 'src/include/posix' to 'src/include/compat/posix',
    'src/include/compat/stdc' etc.
  * The IPv6 implementation now supports address scopes. (See LWIP_IPV6_SCOPES documentation
    and ip6_zone.h for more documentation)
  * LWIP_HOOK_DHCP_APPEND_OPTIONS() has changed, see description in opt.h (options_out_len is not
    available in struct dhcp any more)
  * Added debug helper asserts to ensure threading/locking requirements are met (define
    LWIP_MARK_TCPIP_THREAD() and LWIP_ASSERT_CORE_LOCKED()).
  * Added sys_mbox_trypost_fromisr() and tcpip_callbackmsg_trycallback_fromisr()
    These can be used to post preallocated messages from an ISR to the tcpip thread
    (e.g. when using FreeRTOS)

(2.0.2)

  ++ Application changes:

  * slipif: The way to pass serial port number has changed. netif->num is not
    supported any more, netif->state is interpreted as an u8_t port number now
    (it's not a POINTER to an u8_t any more!)

(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