minix/lib/liblwip/dist/src/core/init.c

   1 /**
   2  * @file
   3  * Modules initialization
   4  *
   5  */
   6
   7 /*
   8  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without modification,
  12  * are permitted provided that the following conditions are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright notice,
  15  *    this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright notice,
  17  *    this list of conditions and the following disclaimer in the documentation
  18  *    and/or other materials provided with the distribution.
  19  * 3. The name of the author may not be used to endorse or promote products
  20  *    derived from this software without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  23  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  24  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  25  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  26  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  27  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  30  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  31  * OF SUCH DAMAGE.
  32  *
  33  * This file is part of the lwIP TCP/IP stack.
  34  *
  35  * Author: Adam Dunkels <adam@sics.se>
  36  */
  37
  38 #include "lwip/opt.h"
  39
  40 #include "lwip/init.h"
  41 #include "lwip/stats.h"
  42 #include "lwip/sys.h"
  43 #include "lwip/mem.h"
  44 #include "lwip/memp.h"
  45 #include "lwip/pbuf.h"
  46 #include "lwip/netif.h"
  47 #include "lwip/sockets.h"
  48 #include "lwip/ip.h"
  49 #include "lwip/raw.h"
  50 #include "lwip/udp.h"
  51 #include "lwip/priv/tcp_priv.h"
  52 #include "lwip/igmp.h"
  53 #include "lwip/dns.h"
  54 #include "lwip/timeouts.h"
  55 #include "lwip/etharp.h"
  56 #include "lwip/ip6.h"
  57 #include "lwip/nd6.h"
  58 #include "lwip/mld6.h"
  59 #include "lwip/api.h"
  60
  61 #include "netif/ppp/ppp_opts.h"
  62 #include "netif/ppp/ppp_impl.h"
  63
  64 #ifndef LWIP_SKIP_PACKING_CHECK
  65
  66 #ifdef PACK_STRUCT_USE_INCLUDES
  67 #  include "arch/bpstruct.h"
  68 #endif
  69 PACK_STRUCT_BEGIN
  70 struct packed_struct_test
  71 {
  72   PACK_STRUCT_FLD_8(u8_t  dummy1);
  73   PACK_STRUCT_FIELD(u32_t dummy2);
  74 } PACK_STRUCT_STRUCT;
  75 PACK_STRUCT_END
  76 #ifdef PACK_STRUCT_USE_INCLUDES
  77 #  include "arch/epstruct.h"
  78 #endif
  79 #define PACKED_STRUCT_TEST_EXPECTED_SIZE 5
  80
  81 #endif
  82
  83 /* Compile-time sanity checks for configuration errors.
  84  * These can be done independently of LWIP_DEBUG, without penalty.
  85  */
  86 #ifndef BYTE_ORDER
  87   #error "BYTE_ORDER is not defined, you have to define it in your cc.h"
  88 #endif
  89 #if (!IP_SOF_BROADCAST && IP_SOF_BROADCAST_RECV)
  90   #error "If you want to use broadcast filter per pcb on recv operations, you have to define IP_SOF_BROADCAST=1 in your lwipopts.h"
  91 #endif
  92 #if (!LWIP_UDP && LWIP_UDPLITE)
  93   #error "If you want to use UDP Lite, you have to define LWIP_UDP=1 in your lwipopts.h"
  94 #endif
  95 #if (!LWIP_UDP && LWIP_DHCP)
  96   #error "If you want to use DHCP, you have to define LWIP_UDP=1 in your lwipopts.h"
  97 #endif
  98 #if (!LWIP_UDP && !LWIP_RAW && LWIP_MULTICAST_TX_OPTIONS)
  99   #error "If you want to use LWIP_MULTICAST_TX_OPTIONS, you have to define LWIP_UDP=1 and/or LWIP_RAW=1 in your lwipopts.h"
 100 #endif
 101 #if (!LWIP_UDP && LWIP_DNS)
 102   #error "If you want to use DNS, you have to define LWIP_UDP=1 in your lwipopts.h"
 103 #endif
 104 #if !MEMP_MEM_MALLOC /* MEMP_NUM_* checks are disabled when not using the pool allocator */
 105 #if (LWIP_ARP && ARP_QUEUEING && (MEMP_NUM_ARP_QUEUE<=0))
 106   #error "If you want to use ARP Queueing, you have to define MEMP_NUM_ARP_QUEUE>=1 in your lwipopts.h"
 107 #endif
 108 #if (LWIP_RAW && (MEMP_NUM_RAW_PCB<=0))
 109   #error "If you want to use RAW, you have to define MEMP_NUM_RAW_PCB>=1 in your lwipopts.h"
 110 #endif
 111 #if (LWIP_UDP && (MEMP_NUM_UDP_PCB<=0))
 112   #error "If you want to use UDP, you have to define MEMP_NUM_UDP_PCB>=1 in your lwipopts.h"
 113 #endif
 114 #if (LWIP_TCP && (MEMP_NUM_TCP_PCB<=0))
 115   #error "If you want to use TCP, you have to define MEMP_NUM_TCP_PCB>=1 in your lwipopts.h"
 116 #endif
 117 #if (LWIP_IGMP && (MEMP_NUM_IGMP_GROUP<=1))
 118   #error "If you want to use IGMP, you have to define MEMP_NUM_IGMP_GROUP>1 in your lwipopts.h"
 119 #endif
 120 #if (LWIP_IGMP && !LWIP_MULTICAST_TX_OPTIONS)
 121   #error "If you want to use IGMP, you have to define LWIP_MULTICAST_TX_OPTIONS==1 in your lwipopts.h"
 122 #endif
 123 #if (LWIP_IGMP && !LWIP_IPV4)
 124   #error "IGMP needs LWIP_IPV4 enabled in your lwipopts.h"
 125 #endif
 126 #if ((LWIP_NETCONN || LWIP_SOCKET) && (MEMP_NUM_TCPIP_MSG_API<=0))
 127   #error "If you want to use Sequential API, you have to define MEMP_NUM_TCPIP_MSG_API>=1 in your lwipopts.h"
 128 #endif
 129 /* There must be sufficient timeouts, taking into account requirements of the subsystems. */
 130 #if LWIP_TIMERS && (MEMP_NUM_SYS_TIMEOUT < (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS + PPP_SUPPORT + (LWIP_IPV6 ? (1 + LWIP_IPV6_REASS + LWIP_IPV6_MLD) : 0)))
 131   #error "MEMP_NUM_SYS_TIMEOUT is too low to accomodate all required timeouts"
 132 #endif
 133 #if (IP_REASSEMBLY && (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS))
 134   #error "MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS doesn't make sense since each struct ip_reassdata must hold 2 pbufs at least!"
 135 #endif
 136 #endif /* !MEMP_MEM_MALLOC */
 137 #if LWIP_WND_SCALE
 138 #if (LWIP_TCP && (TCP_WND > 0xffffffff))
 139   #error "If you want to use TCP, TCP_WND must fit in an u32_t, so, you have to reduce it in your lwipopts.h"
 140 #endif
 141 #if (LWIP_TCP && (TCP_RCV_SCALE > 14))
 142   #error "The maximum valid window scale value is 14!"
 143 #endif
 144 #if (LWIP_TCP && (TCP_WND > (0xFFFFU << TCP_RCV_SCALE)))
 145   #error "TCP_WND is bigger than the configured LWIP_WND_SCALE allows!"
 146 #endif
 147 #if (LWIP_TCP && ((TCP_WND >> TCP_RCV_SCALE) == 0))
 148   #error "TCP_WND is too small for the configured LWIP_WND_SCALE (results in zero window)!"
 149 #endif
 150 #else /* LWIP_WND_SCALE */
 151 #if (LWIP_TCP && (TCP_WND > 0xffff))
 152   #error "If you want to use TCP, TCP_WND must fit in an u16_t, so, you have to reduce it in your lwipopts.h (or enable window scaling)"
 153 #endif
 154 #endif /* LWIP_WND_SCALE */
 155 #if (LWIP_TCP && (TCP_SND_QUEUELEN > 0xffff))
 156   #error "If you want to use TCP, TCP_SND_QUEUELEN must fit in an u16_t, so, you have to reduce it in your lwipopts.h"
 157 #endif
 158 #if (LWIP_TCP && (TCP_SND_QUEUELEN < 2))
 159   #error "TCP_SND_QUEUELEN must be at least 2 for no-copy TCP writes to work"
 160 #endif
 161 #if (LWIP_TCP && ((TCP_MAXRTX > 12) || (TCP_SYNMAXRTX > 12)))
 162   #error "If you want to use TCP, TCP_MAXRTX and TCP_SYNMAXRTX must less or equal to 12 (due to tcp_backoff table), so, you have to reduce them in your lwipopts.h"
 163 #endif
 164 #if (LWIP_TCP && TCP_LISTEN_BACKLOG && ((TCP_DEFAULT_LISTEN_BACKLOG < 0) || (TCP_DEFAULT_LISTEN_BACKLOG > 0xff)))
 165   #error "If you want to use TCP backlog, TCP_DEFAULT_LISTEN_BACKLOG must fit into an u8_t"
 166 #endif
 167 #if (LWIP_NETIF_API && (NO_SYS==1))
 168   #error "If you want to use NETIF API, you have to define NO_SYS=0 in your lwipopts.h"
 169 #endif
 170 #if ((LWIP_SOCKET || LWIP_NETCONN) && (NO_SYS==1))
 171   #error "If you want to use Sequential API, you have to define NO_SYS=0 in your lwipopts.h"
 172 #endif
 173 #if (LWIP_PPP_API && (NO_SYS==1))
 174   #error "If you want to use PPP API, you have to define NO_SYS=0 in your lwipopts.h"
 175 #endif
 176 #if (LWIP_PPP_API && (PPP_SUPPORT==0))
 177   #error "If you want to use PPP API, you have to enable PPP_SUPPORT in your lwipopts.h"
 178 #endif
 179 #if (((!LWIP_DHCP) || (!LWIP_AUTOIP)) && LWIP_DHCP_AUTOIP_COOP)
 180   #error "If you want to use DHCP/AUTOIP cooperation mode, you have to define LWIP_DHCP=1 and LWIP_AUTOIP=1 in your lwipopts.h"
 181 #endif
 182 #if (((!LWIP_DHCP) || (!LWIP_ARP)) && DHCP_DOES_ARP_CHECK)
 183   #error "If you want to use DHCP ARP checking, you have to define LWIP_DHCP=1 and LWIP_ARP=1 in your lwipopts.h"
 184 #endif
 185 #if (!LWIP_ARP && LWIP_AUTOIP)
 186   #error "If you want to use AUTOIP, you have to define LWIP_ARP=1 in your lwipopts.h"
 187 #endif
 188 #if (LWIP_TCP && ((LWIP_EVENT_API && LWIP_CALLBACK_API) || (!LWIP_EVENT_API && !LWIP_CALLBACK_API)))
 189   #error "One and exactly one of LWIP_EVENT_API and LWIP_CALLBACK_API has to be enabled in your lwipopts.h"
 190 #endif
 191 #if (MEM_LIBC_MALLOC && MEM_USE_POOLS)
 192   #error "MEM_LIBC_MALLOC and MEM_USE_POOLS may not both be simultaneously enabled in your lwipopts.h"
 193 #endif
 194 #if (MEM_USE_POOLS && !MEMP_USE_CUSTOM_POOLS)
 195   #error "MEM_USE_POOLS requires custom pools (MEMP_USE_CUSTOM_POOLS) to be enabled in your lwipopts.h"
 196 #endif
 197 #if (PBUF_POOL_BUFSIZE <= MEM_ALIGNMENT)
 198   #error "PBUF_POOL_BUFSIZE must be greater than MEM_ALIGNMENT or the offset may take the full first pbuf"
 199 #endif
 200 #if (DNS_LOCAL_HOSTLIST && !DNS_LOCAL_HOSTLIST_IS_DYNAMIC && !(defined(DNS_LOCAL_HOSTLIST_INIT)))
 201   #error "you have to define define DNS_LOCAL_HOSTLIST_INIT {{'host1', 0x123}, {'host2', 0x234}} to initialize DNS_LOCAL_HOSTLIST"
 202 #endif
 203 #if PPP_SUPPORT && !PPPOS_SUPPORT && !PPPOE_SUPPORT && !PPPOL2TP_SUPPORT
 204   #error "PPP_SUPPORT needs at least one of PPPOS_SUPPORT, PPPOE_SUPPORT or PPPOL2TP_SUPPORT turned on"
 205 #endif
 206 #if PPP_SUPPORT && !PPP_IPV4_SUPPORT && !PPP_IPV6_SUPPORT
 207   #error "PPP_SUPPORT needs PPP_IPV4_SUPPORT and/or PPP_IPV6_SUPPORT turned on"
 208 #endif
 209 #if PPP_SUPPORT && PPP_IPV4_SUPPORT && !LWIP_IPV4
 210   #error "PPP_IPV4_SUPPORT needs LWIP_IPV4 turned on"
 211 #endif
 212 #if PPP_SUPPORT && PPP_IPV6_SUPPORT && !LWIP_IPV6
 213   #error "PPP_IPV6_SUPPORT needs LWIP_IPV6 turned on"
 214 #endif
 215 #if !LWIP_ETHERNET && (LWIP_ARP || PPPOE_SUPPORT)
 216   #error "LWIP_ETHERNET needs to be turned on for LWIP_ARP or PPPOE_SUPPORT"
 217 #endif
 218 #if LWIP_TCPIP_CORE_LOCKING_INPUT && !LWIP_TCPIP_CORE_LOCKING
 219   #error "When using LWIP_TCPIP_CORE_LOCKING_INPUT, LWIP_TCPIP_CORE_LOCKING must be enabled, too"
 220 #endif
 221 #if LWIP_TCP && LWIP_NETIF_TX_SINGLE_PBUF && !TCP_OVERSIZE
 222   #error "LWIP_NETIF_TX_SINGLE_PBUF needs TCP_OVERSIZE enabled to create single-pbuf TCP packets"
 223 #endif
 224 #if LWIP_NETCONN && LWIP_TCP
 225 #if NETCONN_COPY != TCP_WRITE_FLAG_COPY
 226   #error "NETCONN_COPY != TCP_WRITE_FLAG_COPY"
 227 #endif
 228 #if NETCONN_MORE != TCP_WRITE_FLAG_MORE
 229   #error "NETCONN_MORE != TCP_WRITE_FLAG_MORE"
 230 #endif
 231 #endif /* LWIP_NETCONN && LWIP_TCP */
 232 #if LWIP_SOCKET
 233 /* Check that the SO_* socket options and SOF_* lwIP-internal flags match */
 234 #if SO_REUSEADDR != SOF_REUSEADDR
 235   #error "WARNING: SO_REUSEADDR != SOF_REUSEADDR"
 236 #endif
 237 #if SO_KEEPALIVE != SOF_KEEPALIVE
 238   #error "WARNING: SO_KEEPALIVE != SOF_KEEPALIVE"
 239 #endif
 240 #if SO_BROADCAST != SOF_BROADCAST
 241   #error "WARNING: SO_BROADCAST != SOF_BROADCAST"
 242 #endif
 243 #endif /* LWIP_SOCKET */
 244
 245
 246 /* Compile-time checks for deprecated options.
 247  */
 248 #ifdef MEMP_NUM_TCPIP_MSG
 249   #error "MEMP_NUM_TCPIP_MSG option is deprecated. Remove it from your lwipopts.h."
 250 #endif
 251 #ifdef TCP_REXMIT_DEBUG
 252   #error "TCP_REXMIT_DEBUG option is deprecated. Remove it from your lwipopts.h."
 253 #endif
 254 #ifdef RAW_STATS
 255   #error "RAW_STATS option is deprecated. Remove it from your lwipopts.h."
 256 #endif
 257 #ifdef ETHARP_QUEUE_FIRST
 258   #error "ETHARP_QUEUE_FIRST option is deprecated. Remove it from your lwipopts.h."
 259 #endif
 260 #ifdef ETHARP_ALWAYS_INSERT
 261   #error "ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h."
 262 #endif
 263 #if !NO_SYS && LWIP_TCPIP_CORE_LOCKING && LWIP_COMPAT_MUTEX && !defined(LWIP_COMPAT_MUTEX_ALLOWED)
 264   #error "LWIP_COMPAT_MUTEX cannot prevent priority inversion. It is recommended to implement priority-aware mutexes. (Define LWIP_COMPAT_MUTEX_ALLOWED to disable this error.)"
 265 #endif
 266
 267 #ifndef LWIP_DISABLE_TCP_SANITY_CHECKS
 268 #define LWIP_DISABLE_TCP_SANITY_CHECKS  0
 269 #endif
 270 #ifndef LWIP_DISABLE_MEMP_SANITY_CHECKS
 271 #define LWIP_DISABLE_MEMP_SANITY_CHECKS 0
 272 #endif
 273
 274 /* MEMP sanity checks */
 275 #if MEMP_MEM_MALLOC
 276 #if !LWIP_DISABLE_MEMP_SANITY_CHECKS
 277 #if LWIP_NETCONN || LWIP_SOCKET
 278 #if !MEMP_NUM_NETCONN && LWIP_SOCKET
 279 #error "lwip_sanity_check: WARNING: MEMP_NUM_NETCONN cannot be 0 when using sockets!"
 280 #endif
 281 #else /* MEMP_MEM_MALLOC */
 282 #if MEMP_NUM_NETCONN > (MEMP_NUM_TCP_PCB+MEMP_NUM_TCP_PCB_LISTEN+MEMP_NUM_UDP_PCB+MEMP_NUM_RAW_PCB)
 283 #error "lwip_sanity_check: WARNING: MEMP_NUM_NETCONN should be less than the sum of MEMP_NUM_{TCP,RAW,UDP}_PCB+MEMP_NUM_TCP_PCB_LISTEN. If you know what you are doing, define LWIP_DISABLE_MEMP_SANITY_CHECKS to 1 to disable this error."
 284 #endif
 285 #endif /* LWIP_NETCONN || LWIP_SOCKET */
 286 #endif /* !LWIP_DISABLE_MEMP_SANITY_CHECKS */
 287 #if MEM_USE_POOLS
 288 #error "MEMP_MEM_MALLOC and MEM_USE_POOLS cannot be enabled at the same time"
 289 #endif
 290 #ifdef LWIP_HOOK_MEMP_AVAILABLE
 291 #error "LWIP_HOOK_MEMP_AVAILABLE doesn't make sense with MEMP_MEM_MALLOC"
 292 #endif
 293 #endif /* MEMP_MEM_MALLOC */
 294
 295 /* TCP sanity checks */
 296 #if !LWIP_DISABLE_TCP_SANITY_CHECKS
 297 #if LWIP_TCP
 298 #if !MEMP_MEM_MALLOC && (MEMP_NUM_TCP_SEG < TCP_SND_QUEUELEN)
 299   #error "lwip_sanity_check: WARNING: MEMP_NUM_TCP_SEG should be at least as big as TCP_SND_QUEUELEN. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 300 #endif
 301 #if TCP_SND_BUF < (2 * TCP_MSS)
 302   #error "lwip_sanity_check: WARNING: TCP_SND_BUF must be at least as much as (2 * TCP_MSS) for things to work smoothly. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 303 #endif
 304 #if TCP_SND_QUEUELEN < (2 * (TCP_SND_BUF / TCP_MSS))
 305   #error "lwip_sanity_check: WARNING: TCP_SND_QUEUELEN must be at least as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 306 #endif
 307 #if TCP_SNDLOWAT >= TCP_SND_BUF
 308   #error "lwip_sanity_check: WARNING: TCP_SNDLOWAT must be less than TCP_SND_BUF. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 309 #endif
 310 #if TCP_SNDLOWAT >= (0xFFFF - (4 * TCP_MSS))
 311   #error "lwip_sanity_check: WARNING: TCP_SNDLOWAT must at least be 4*MSS below u16_t overflow!"
 312 #endif
 313 #if TCP_SNDQUEUELOWAT >= TCP_SND_QUEUELEN
 314   #error "lwip_sanity_check: WARNING: TCP_SNDQUEUELOWAT must be less than TCP_SND_QUEUELEN. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 315 #endif
 316 #if !MEMP_MEM_MALLOC && PBUF_POOL_SIZE && (PBUF_POOL_BUFSIZE <= (PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))
 317   #error "lwip_sanity_check: WARNING: PBUF_POOL_BUFSIZE does not provide enough space for protocol headers. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 318 #endif
 319 #if !MEMP_MEM_MALLOC && PBUF_POOL_SIZE && (TCP_WND > (PBUF_POOL_SIZE * (PBUF_POOL_BUFSIZE - (PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))))
 320   #error "lwip_sanity_check: WARNING: TCP_WND is larger than space provided by PBUF_POOL_SIZE * (PBUF_POOL_BUFSIZE - protocol headers). If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 321 #endif
 322 #if TCP_WND < TCP_MSS
 323   #error "lwip_sanity_check: WARNING: TCP_WND is smaller than MSS. If you know what you are doing, define LWIP_DISABLE_TCP_SANITY_CHECKS to 1 to disable this error."
 324 #endif
 325 #endif /* LWIP_TCP */
 326 #endif /* !LWIP_DISABLE_TCP_SANITY_CHECKS */
 327
 328 /**
 329  * @ingroup lwip_nosys
 330  * Initialize all modules.
 331  * Use this in NO_SYS mode. Use tcpip_init() otherwise.
 332  */
 333 void
 334 lwip_init(void)
 335 {
 336 #ifndef LWIP_SKIP_CONST_CHECK
 337   int a;
 338   LWIP_UNUSED_ARG(a);
 339   LWIP_ASSERT("LWIP_CONST_CAST not implemented correctly. Check your lwIP port.", LWIP_CONST_CAST(void*, &a) == &a);
 340 #endif
 341 #ifndef LWIP_SKIP_PACKING_CHECK
 342   LWIP_ASSERT("Struct packing not implemented correctly. Check your lwIP port.", sizeof(struct packed_struct_test) == PACKED_STRUCT_TEST_EXPECTED_SIZE);
 343 #endif
 344
 345   /* Modules initialization */
 346   stats_init();
 347 #if !NO_SYS
 348   sys_init();
 349 #endif /* !NO_SYS */
 350   mem_init();
 351   memp_init();
 352   pbuf_init();
 353   netif_init();
 354 #if LWIP_IPV4
 355   ip_init();
 356 #if LWIP_ARP
 357   etharp_init();
 358 #endif /* LWIP_ARP */
 359 #endif /* LWIP_IPV4 */
 360 #if LWIP_RAW
 361   raw_init();
 362 #endif /* LWIP_RAW */
 363 #if LWIP_UDP
 364   udp_init();
 365 #endif /* LWIP_UDP */
 366 #if LWIP_TCP
 367   tcp_init();
 368 #endif /* LWIP_TCP */
 369 #if LWIP_IGMP
 370   igmp_init();
 371 #endif /* LWIP_IGMP */
 372 #if LWIP_DNS
 373   dns_init();
 374 #endif /* LWIP_DNS */
 375 #if PPP_SUPPORT
 376   ppp_init();
 377 #endif
 378
 379 #if LWIP_TIMERS
 380   sys_timeouts_init();
 381 #endif /* LWIP_TIMERS */
 382 }