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 | (git master)
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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 | (2.1.0)
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12 |
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13 | ++ Application changes:
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14 |
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15 | * Use the new altcp API for seamless TLS integration into existing TCP applications (see changelog)
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16 | * TCP only kills existing connections with a LOWER priority than the one currently being opened.
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17 | Previous implementations also kill existing connections of the SAME priority.
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18 | * ip4_route_src: parameter order is reversed: ip4_route_src(dest, src) -> ip4_route_src(src, dest)
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19 | to make parameter order consistent with other ip*_route*() functions.
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20 | Same also applies to LWIP_HOOK_IP4_ROUTE_SRC() parameter order.
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21 | * pbuf API: pbuf->type (an u8_t holding the enum 'pbuf_type') has changed to only hold a
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22 | description of the pbuf (e.g. data following pbuf struct, data volatile, allocation
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23 | source heap/pool/etc.). As a consequence, applications can't test pbuf->type any more.
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24 | Use pbuf_match_type(pbuf, type) instead.
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25 | * socket API: according to the standard, SO_ERROR now only returns asynchronous errors.
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26 | All other/normal/synchronous errors are (and always were) available via 'errno'.
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27 | LWIP_SOCKET_SET_ERRNO has been removed - 'errno' is always set - and required!
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28 | * httpd LWIP_HTTPD_CGI_SSI: httpd_cgi_handler() has an additional parameter "struct fs_file *"
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29 |
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30 | ++ Port changes:
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31 |
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32 | * tcpip_trycallback() was renamed to tcpip_callbackmsg_trycallback() to avoid confusion
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33 | with tcpip_try_callback()
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34 | * compatibility headers: moved from 'src/include/posix' to 'src/include/compat/posix',
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35 | 'src/include/compat/stdc' etc.
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36 | * The IPv6 implementation now supports address scopes. (See LWIP_IPV6_SCOPES documentation
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37 | and ip6_zone.h for more documentation)
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38 | * LWIP_HOOK_DHCP_APPEND_OPTIONS() has changed, see description in opt.h (options_out_len is not
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39 | available in struct dhcp any more)
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40 | * Added debug helper asserts to ensure threading/locking requirements are met (define
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41 | LWIP_MARK_TCPIP_THREAD() and LWIP_ASSERT_CORE_LOCKED()).
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42 | * Added sys_mbox_trypost_fromisr() and tcpip_callbackmsg_trycallback_fromisr()
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43 | These can be used to post preallocated messages from an ISR to the tcpip thread
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44 | (e.g. when using FreeRTOS)
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45 |
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46 | (2.0.2)
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47 |
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48 | ++ Application changes:
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49 |
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50 | * slipif: The way to pass serial port number has changed. netif->num is not
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51 | supported any more, netif->state is interpreted as an u8_t port number now
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52 | (it's not a POINTER to an u8_t any more!)
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53 |
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54 | (2.0.1)
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55 |
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56 | ++ Application changes:
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57 |
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58 | * UDP does NOT receive multicast traffic from ALL netifs on an UDP PCB bound to a specific
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59 | netif any more. Users need to bind to IP_ADDR_ANY to receive multicast traffic and compare
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60 | ip_current_netif() to the desired netif for every packet.
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61 | See bug #49662 for an explanation.
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62 |
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63 | (2.0.0)
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64 |
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65 | ++ Application changes:
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66 |
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67 | * Changed netif "up" flag handling to be an administrative flag (as opposed to the previous meaning of
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68 | "ip4-address-valid", a netif will now not be used for transmission if not up) -> even a DHCP netif
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69 | has to be set "up" before starting the DHCP client
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70 | * Added IPv6 support (dual-stack or IPv4/IPv6 only)
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71 | * Changed ip_addr_t to be a union in dual-stack mode (use ip4_addr_t where referring to IPv4 only).
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72 | * Major rewrite of SNMP (added MIB parser that creates code stubs for custom MIBs);
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73 | supports SNMPv2c (experimental v3 support)
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74 | * Moved some core applications from contrib repository to src/apps (and include/lwip/apps)
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75 |
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76 | +++ Raw API:
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77 | * Changed TCP listen backlog: removed tcp_accepted(), added the function pair tcp_backlog_delayed()/
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78 | tcp_backlog_accepted() to explicitly delay backlog handling on a connection pcb
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79 |
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80 | +++ Socket API:
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81 | * Added an implementation for posix sendmsg()
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82 | * Added LWIP_FIONREAD_LINUXMODE that makes ioctl/FIONREAD return the size of the next pending datagram
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83 |
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84 | ++ Port changes
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85 |
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86 | +++ new files:
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87 | * MANY new and moved files!
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88 | * Added src/Filelists.mk for use in Makefile projects
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89 | * Continued moving stack-internal parts from abc.h to abc_priv.h in sub-folder "priv"
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90 | to let abc.h only contain the actual application programmer's API
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91 |
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92 | +++ sys layer:
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93 | * Made LWIP_TCPIP_CORE_LOCKING==1 the default as it usually performs better than
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94 | the traditional message passing (although with LWIP_COMPAT_MUTEX you are still
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95 | open to priority inversion, so this is not recommended any more)
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96 | * Added LWIP_NETCONN_SEM_PER_THREAD to use one "op_completed" semaphore per thread
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97 | instead of using one per netconn (these semaphores are used even with core locking
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98 | enabled as some longer lasting functions like big writes still need to delay)
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99 | * Added generalized abstraction for itoa(), strnicmp(), stricmp() and strnstr()
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100 | in def.h (to be overridden in cc.h) instead of config
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101 | options for netbiosns, httpd, dns, etc. ...
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102 | * New abstraction for hton* and ntoh* functions in def.h.
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103 | To override them, use the following in cc.h:
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104 | #define lwip_htons(x) <your_htons>
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105 | #define lwip_htonl(x) <your_htonl>
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106 |
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107 | +++ new options:
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108 | * TODO
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109 |
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110 | +++ new pools:
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111 | * Added LWIP_MEMPOOL_* (declare/init/alloc/free) to declare private memp pools
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112 | that share memp.c code but do not have to be made global via lwippools.h
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113 | * Added pools for IPv6, MPU_COMPATIBLE, dns-api, netif-api, etc.
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114 | * added hook LWIP_HOOK_MEMP_AVAILABLE() to get informed when a memp pool was empty and an item
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115 | is now available
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116 |
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117 | * Signature of LWIP_HOOK_VLAN_SET macro was changed
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118 |
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119 | * LWIP_DECLARE_MEMORY_ALIGNED() may be used to declare aligned memory buffers (mem/memp)
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120 | or to move buffers to dedicated memory using compiler attributes
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121 |
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122 | * Standard C headers are used to define sized types and printf formatters
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123 | (disable by setting LWIP_NO_STDINT_H=1 or LWIP_NO_INTTYPES_H=1 if your compiler
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124 | does not support these)
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125 |
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126 |
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127 | ++ Major bugfixes/improvements
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128 |
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129 | * Added IPv6 support (dual-stack or IPv4/IPv6 only)
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130 | * Major rewrite of PPP (incl. keep-up with apache pppd)
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131 | see doc/ppp.txt for an upgrading how-to
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132 | * Major rewrite of SNMP (incl. MIB parser)
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133 | * Fixed timing issues that might have lead to losing a DHCP lease
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134 | * Made rx processing path more robust against crafted errors
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135 | * TCP window scaling support
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136 | * modification of api modules to support FreeRTOS-MPU (don't pass stack-pointers to other threads)
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137 | * made DNS client more robust
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138 | * support PBUF_REF for RX packets
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139 | * LWIP_NETCONN_FULLDUPLEX allows netconn/sockets to be used for reading/writing from separate
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140 | threads each (needs LWIP_NETCONN_SEM_PER_THREAD)
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141 | * Moved and reordered stats (mainly memp/mib2)
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142 |
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143 | (1.4.0)
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144 |
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145 | ++ Application changes:
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146 |
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147 | * Replaced struct ip_addr by typedef ip_addr_t (struct ip_addr is kept for
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148 | compatibility to old applications, but will be removed in the future).
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149 |
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150 | * Renamed mem_realloc() to mem_trim() to prevent confusion with realloc()
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151 |
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152 | +++ Raw API:
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153 | * Changed the semantics of tcp_close() (since it was rather a
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154 | shutdown before): Now the application does *NOT* get any calls to the recv
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155 | callback (aside from NULL/closed) after calling tcp_close()
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156 |
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157 | * When calling tcp_abort() from a raw API TCP callback function,
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158 | make sure you return ERR_ABRT to prevent accessing unallocated memory.
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159 | (ERR_ABRT now means the applicaiton has called tcp_abort!)
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160 |
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161 | +++ Netconn API:
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162 | * Changed netconn_receive() and netconn_accept() to return
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163 | err_t, not a pointer to new data/netconn.
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164 |
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165 | +++ Socket API:
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166 | * LWIP_SO_RCVTIMEO: when accept() or recv() time out, they
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167 | now set errno to EWOULDBLOCK/EAGAIN, not ETIMEDOUT.
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168 |
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169 | * Added a minimal version of posix fctl() to have a
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170 | standardised way to set O_NONBLOCK for nonblocking sockets.
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171 |
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172 | +++ all APIs:
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173 | * correctly implemented SO(F)_REUSEADDR
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174 |
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175 | ++ Port changes
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176 |
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177 | +++ new files:
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178 |
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179 | * Added 4 new files: def.c, timers.c, timers.h, tcp_impl.h:
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180 |
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181 | * Moved stack-internal parts of tcp.h to tcp_impl.h, tcp.h now only contains
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182 | the actual application programmer's API
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183 |
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184 | * Separated timer implementation from sys.h/.c, moved to timers.h/.c;
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185 | Added timer implementation for NO_SYS==1, set NO_SYS_NO_TIMERS==1 if you
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186 | still want to use your own timer implementation for NO_SYS==0 (as before).
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187 |
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188 | +++ sys layer:
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189 |
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190 | * Converted mbox- and semaphore-functions to take pointers to sys_mbox_t/
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191 | sys_sem_t;
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192 |
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193 | * Converted sys_mbox_new/sys_sem_new to take pointers and return err_t;
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194 |
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195 | * Added Mutex concept in sys_arch (define LWIP_COMPAT_MUTEX to let sys.h use
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196 | binary semaphores instead of mutexes - as before)
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197 |
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198 | +++ new options:
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199 |
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200 | * Don't waste memory when chaining segments, added option TCP_OVERSIZE to
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201 | prevent creating many small pbufs when calling tcp_write with many small
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202 | blocks of data. Instead, pbufs are allocated larger than needed and the
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203 | space is used for later calls to tcp_write.
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204 |
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205 | * Added LWIP_NETIF_TX_SINGLE_PBUF to always copy to try to create single pbufs
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206 | in tcp_write/udp_send.
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207 |
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208 | * Added an additional option LWIP_ETHERNET to support ethernet without ARP
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209 | (necessary for pure PPPoE)
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210 |
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211 | * Add MEMP_SEPARATE_POOLS to place memory pools in separate arrays. This may
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212 | be used to place these pools into user-defined memory by using external
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213 | declaration.
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214 |
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215 | * Added TCP_SNDQUEUELOWAT corresponding to TCP_SNDLOWAT
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216 |
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217 | +++ new pools:
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218 |
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219 | * Netdb uses a memp pool for allocating memory when getaddrinfo() is called,
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220 | so MEMP_NUM_NETDB has to be set accordingly.
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221 |
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222 | * DNS_LOCAL_HOSTLIST_IS_DYNAMIC uses a memp pool instead of the heap, so
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223 | MEMP_NUM_LOCALHOSTLIST has to be set accordingly.
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224 |
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225 | * Snmp-agent uses a memp pools instead of the heap, so MEMP_NUM_SNMP_* have
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226 | to be set accordingly.
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227 |
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228 | * PPPoE uses a MEMP pool instead of the heap, so MEMP_NUM_PPPOE_INTERFACES
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229 | has to be set accordingly
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230 |
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231 | * Integrated loopif into netif.c - loopif does not have to be created by the
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232 | port any more, just define LWIP_HAVE_LOOPIF to 1.
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233 |
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234 | * Added define LWIP_RAND() for lwip-wide randomization (needs to be defined
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235 | in cc.h, e.g. used by igmp)
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236 |
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237 | * Added printf-formatter X8_F to printf u8_t as hex
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238 |
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239 | * The heap now may be moved to user-defined memory by defining
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240 | LWIP_RAM_HEAP_POINTER as a void pointer to that memory's address
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241 |
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242 | * added autoip_set_struct() and dhcp_set_struct() to let autoip and dhcp work
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243 | with user-allocated structs instead of calling mem_malloc
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244 |
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245 | * Added const char* name to mem- and memp-stats for easier debugging.
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246 |
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247 | * Calculate the TCP/UDP checksum while copying to only fetch data once:
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248 | Define LWIP_CHKSUM_COPY to a memcpy-like function that returns the checksum
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249 |
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250 | * Added SO_REUSE_RXTOALL to pass received UDP broadcast/multicast packets to
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251 | more than one pcb.
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252 |
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253 | * Changed the semantics of ARP_QUEUEING==0: ARP_QUEUEING now cannot be turned
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254 | off any more, if this is set to 0, only one packet (the most recent one) is
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255 | queued (like demanded by RFC 1122).
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256 |
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257 |
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258 | ++ Major bugfixes/improvements
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259 |
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260 | * Implemented tcp_shutdown() to only shut down one end of a connection
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261 | * Implemented shutdown() at socket- and netconn-level
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262 | * Added errorset support to select() + improved select speed overhead
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263 | * Merged pppd to v2.3.11 (including some backported bugfixes from 2.4.x)
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264 | * Added timer implementation for NO_SYS==1 (may be disabled with NO_SYS_NO_TIMERS==1
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265 | * Use macros defined in ip_addr.h to work with IP addresses
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266 | * Implemented many nonblocking socket/netconn functions
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267 | * Fixed ARP input processing: only add a new entry if a request was directed as us
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268 | * mem_realloc() to mem_trim() to prevent confusion with realloc()
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269 | * Some improvements for AutoIP (don't route/forward link-local addresses, don't break
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270 | existing connections when assigning a routable address)
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271 | * Correctly handle remote side overrunning our rcv_wnd in ooseq case
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272 | * Removed packing from ip_addr_t, the packed version is now only used in protocol headers
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273 | * Corrected PBUF_POOL_BUFSIZE for ports where ETH_PAD_SIZE > 0
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274 | * Added support for static ARP table entries
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275 |
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276 | (STABLE-1.3.2)
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277 |
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278 | * initial version of this file
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