init.c

00001 /**
00002  * @file
00003  * Modules initialization
00004  *
00005  */
00006 
00007 /*
00008  * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
00009  * All rights reserved. 
00010  * 
00011  * Redistribution and use in source and binary forms, with or without modification, 
00012  * are permitted provided that the following conditions are met:
00013  *
00014  * 1. Redistributions of source code must retain the above copyright notice,
00015  *    this list of conditions and the following disclaimer.
00016  * 2. Redistributions in binary form must reproduce the above copyright notice,
00017  *    this list of conditions and the following disclaimer in the documentation
00018  *    and/or other materials provided with the distribution.
00019  * 3. The name of the author may not be used to endorse or promote products
00020  *    derived from this software without specific prior written permission. 
00021  *
00022  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
00023  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
00024  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
00025  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
00026  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
00027  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
00028  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
00029  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
00030  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
00031  * OF SUCH DAMAGE.
00032  *
00033  * This file is part of the lwIP TCP/IP stack.
00034  * 
00035  * Author: Adam Dunkels <adam@sics.se>
00036  *
00037  */
00038 
00039 #include "lwip/opt.h"
00040 
00041 #include "lwip/init.h"
00042 #include "lwip/stats.h"
00043 #include "lwip/sys.h"
00044 #include "lwip/mem.h"
00045 #include "lwip/memp.h"
00046 #include "lwip/pbuf.h"
00047 #include "lwip/netif.h"
00048 #include "lwip/sockets.h"
00049 #include "lwip/ip.h"
00050 #include "lwip/raw.h"
00051 #include "lwip/udp.h"
00052 #include "lwip/tcp_impl.h"
00053 #include "lwip/snmp_msg.h"
00054 #include "lwip/autoip.h"
00055 #include "lwip/igmp.h"
00056 #include "lwip/dns.h"
00057 #include "lwip/timers.h"
00058 #include "netif/etharp.h"
00059 
00060 /* Compile-time sanity checks for configuration errors.
00061  * These can be done independently of LWIP_DEBUG, without penalty.
00062  */
00063 #ifndef BYTE_ORDER
00064   #error "BYTE_ORDER is not defined, you have to define it in your cc.h"
00065 #endif
00066 #if (!IP_SOF_BROADCAST && IP_SOF_BROADCAST_RECV)
00067   #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"
00068 #endif
00069 #if (!LWIP_ARP && ARP_QUEUEING)
00070   #error "If you want to use ARP Queueing, you have to define LWIP_ARP=1 in your lwipopts.h"
00071 #endif
00072 #if (!LWIP_UDP && LWIP_UDPLITE)
00073   #error "If you want to use UDP Lite, you have to define LWIP_UDP=1 in your lwipopts.h"
00074 #endif
00075 #if (!LWIP_UDP && LWIP_SNMP)
00076   #error "If you want to use SNMP, you have to define LWIP_UDP=1 in your lwipopts.h"
00077 #endif
00078 #if (!LWIP_UDP && LWIP_DHCP)
00079   #error "If you want to use DHCP, you have to define LWIP_UDP=1 in your lwipopts.h"
00080 #endif
00081 #if (!LWIP_UDP && LWIP_IGMP)
00082   #error "If you want to use IGMP, you have to define LWIP_UDP=1 in your lwipopts.h"
00083 #endif
00084 #if (!LWIP_UDP && LWIP_DNS)
00085   #error "If you want to use DNS, you have to define LWIP_UDP=1 in your lwipopts.h"
00086 #endif
00087 #if (LWIP_ARP && (ARP_TABLE_SIZE > 0x7f))
00088   #error "If you want to use ARP, ARP_TABLE_SIZE must fit in an s8_t, so, you have to reduce it in your lwipopts.h"
00089 #endif
00090 #if (LWIP_ARP && ARP_QUEUEING && (MEMP_NUM_ARP_QUEUE<=0))
00091   #error "If you want to use ARP Queueing, you have to define MEMP_NUM_ARP_QUEUE>=1 in your lwipopts.h"
00092 #endif
00093 #if (LWIP_RAW && (MEMP_NUM_RAW_PCB<=0))
00094   #error "If you want to use RAW, you have to define MEMP_NUM_RAW_PCB>=1 in your lwipopts.h"
00095 #endif
00096 #if (LWIP_UDP && (MEMP_NUM_UDP_PCB<=0))
00097   #error "If you want to use UDP, you have to define MEMP_NUM_UDP_PCB>=1 in your lwipopts.h"
00098 #endif
00099 #if (LWIP_TCP && (MEMP_NUM_TCP_PCB<=0))
00100   #error "If you want to use TCP, you have to define MEMP_NUM_TCP_PCB>=1 in your lwipopts.h"
00101 #endif
00102 #if (LWIP_TCP && (TCP_WND > 0xffff))
00103   #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"
00104 #endif
00105 #if (LWIP_TCP && (TCP_SND_QUEUELEN > 0xffff))
00106   #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"
00107 #endif
00108 #if (LWIP_TCP && ((TCP_MAXRTX > 12) || (TCP_SYNMAXRTX > 12)))
00109   #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"
00110 #endif
00111 #if (LWIP_TCP && TCP_LISTEN_BACKLOG && (TCP_DEFAULT_LISTEN_BACKLOG < 0) || (TCP_DEFAULT_LISTEN_BACKLOG > 0xff))
00112   #error "If you want to use TCP backlog, TCP_DEFAULT_LISTEN_BACKLOG must fit into an u8_t"
00113 #endif
00114 #if (LWIP_IGMP && (MEMP_NUM_IGMP_GROUP<=1))
00115   #error "If you want to use IGMP, you have to define MEMP_NUM_IGMP_GROUP>1 in your lwipopts.h"
00116 #endif
00117 #if (LWIP_NETIF_API && (NO_SYS==1))
00118   #error "If you want to use NETIF API, you have to define NO_SYS=0 in your lwipopts.h"
00119 #endif
00120 #if ((LWIP_SOCKET || LWIP_NETCONN) && (NO_SYS==1))
00121   #error "If you want to use Sequential API, you have to define NO_SYS=0 in your lwipopts.h"
00122 #endif
00123 #if ((LWIP_NETCONN || LWIP_SOCKET) && (MEMP_NUM_TCPIP_MSG_API<=0))
00124   #error "If you want to use Sequential API, you have to define MEMP_NUM_TCPIP_MSG_API>=1 in your lwipopts.h"
00125 #endif
00126 #if (!LWIP_NETCONN && LWIP_SOCKET)
00127   #error "If you want to use Socket API, you have to define LWIP_NETCONN=1 in your lwipopts.h"
00128 #endif
00129 #if (((!LWIP_DHCP) || (!LWIP_AUTOIP)) && LWIP_DHCP_AUTOIP_COOP)
00130   #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"
00131 #endif
00132 #if (((!LWIP_DHCP) || (!LWIP_ARP)) && DHCP_DOES_ARP_CHECK)
00133   #error "If you want to use DHCP ARP checking, you have to define LWIP_DHCP=1 and LWIP_ARP=1 in your lwipopts.h"
00134 #endif
00135 #if (!LWIP_ARP && LWIP_AUTOIP)
00136   #error "If you want to use AUTOIP, you have to define LWIP_ARP=1 in your lwipopts.h"
00137 #endif
00138 #if (LWIP_SNMP && (SNMP_CONCURRENT_REQUESTS<=0))
00139   #error "If you want to use SNMP, you have to define SNMP_CONCURRENT_REQUESTS>=1 in your lwipopts.h"
00140 #endif
00141 #if (LWIP_SNMP && (SNMP_TRAP_DESTINATIONS<=0))
00142   #error "If you want to use SNMP, you have to define SNMP_TRAP_DESTINATIONS>=1 in your lwipopts.h"
00143 #endif
00144 #if (LWIP_TCP && ((LWIP_EVENT_API && LWIP_CALLBACK_API) || (!LWIP_EVENT_API && !LWIP_CALLBACK_API)))
00145   #error "One and exactly one of LWIP_EVENT_API and LWIP_CALLBACK_API has to be enabled in your lwipopts.h"
00146 #endif
00147 /* There must be sufficient timeouts, taking into account requirements of the subsystems. */
00148 #if (MEMP_NUM_SYS_TIMEOUT < (LWIP_TCP + IP_REASSEMBLY + LWIP_ARP + (2*LWIP_DHCP) + LWIP_AUTOIP + LWIP_IGMP + LWIP_DNS + PPP_SUPPORT))
00149   #error "MEMP_NUM_SYS_TIMEOUT is too low to accomodate all required timeouts"
00150 #endif
00151 #if (IP_REASSEMBLY && (MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS))
00152   #error "MEMP_NUM_REASSDATA > IP_REASS_MAX_PBUFS doesn't make sense since each struct ip_reassdata must hold 2 pbufs at least!"
00153 #endif
00154 #if (MEM_LIBC_MALLOC && MEM_USE_POOLS)
00155   #error "MEM_LIBC_MALLOC and MEM_USE_POOLS may not both be simultaneously enabled in your lwipopts.h"
00156 #endif
00157 #if (MEM_USE_POOLS && !MEMP_USE_CUSTOM_POOLS)
00158   #error "MEM_USE_POOLS requires custom pools (MEMP_USE_CUSTOM_POOLS) to be enabled in your lwipopts.h"
00159 #endif
00160 #if (PBUF_POOL_BUFSIZE <= MEM_ALIGNMENT)
00161   #error "PBUF_POOL_BUFSIZE must be greater than MEM_ALIGNMENT or the offset may take the full first pbuf"
00162 #endif
00163 #if (TCP_QUEUE_OOSEQ && !LWIP_TCP)
00164   #error "TCP_QUEUE_OOSEQ requires LWIP_TCP"
00165 #endif
00166 #if (DNS_LOCAL_HOSTLIST && !DNS_LOCAL_HOSTLIST_IS_DYNAMIC && !(defined(DNS_LOCAL_HOSTLIST_INIT)))
00167   #error "you have to define define DNS_LOCAL_HOSTLIST_INIT {{'host1', 0x123}, {'host2', 0x234}} to initialize DNS_LOCAL_HOSTLIST"
00168 #endif
00169 #if PPP_SUPPORT && !PPPOS_SUPPORT & !PPPOE_SUPPORT
00170   #error "PPP_SUPPORT needs either PPPOS_SUPPORT or PPPOE_SUPPORT turned on"
00171 #endif
00172 #if !LWIP_ETHERNET && (LWIP_ARP || PPPOE_SUPPORT)
00173   #error "LWIP_ETHERNET needs to be turned on for LWIP_ARP or PPPOE_SUPPORT"
00174 #endif
00175 #if LWIP_IGMP && !defined(LWIP_RAND)
00176   #error "When using IGMP, LWIP_RAND() needs to be defined to a random-function returning an u32_t random value"
00177 #endif
00178 #if LWIP_TCPIP_CORE_LOCKING_INPUT && !LWIP_TCPIP_CORE_LOCKING
00179   #error "When using LWIP_TCPIP_CORE_LOCKING_INPUT, LWIP_TCPIP_CORE_LOCKING must be enabled, too"
00180 #endif
00181 #if LWIP_TCP && LWIP_NETIF_TX_SINGLE_PBUF && (TCP_OVERSIZE < TCP_MSS)
00182   #error "LWIP_NETIF_TX_SINGLE_PBUF needs TCP_OVERSIZE == TCP_MSS to create single-pbuf TCP packets"
00183 #endif
00184 
00185 
00186 /* Compile-time checks for deprecated options.
00187  */
00188 #ifdef MEMP_NUM_TCPIP_MSG
00189   #error "MEMP_NUM_TCPIP_MSG option is deprecated. Remove it from your lwipopts.h."
00190 #endif
00191 #ifdef MEMP_NUM_API_MSG
00192   #error "MEMP_NUM_API_MSG option is deprecated. Remove it from your lwipopts.h."
00193 #endif
00194 #ifdef TCP_REXMIT_DEBUG
00195   #error "TCP_REXMIT_DEBUG option is deprecated. Remove it from your lwipopts.h."
00196 #endif
00197 #ifdef RAW_STATS
00198   #error "RAW_STATS option is deprecated. Remove it from your lwipopts.h."
00199 #endif
00200 #ifdef ETHARP_QUEUE_FIRST
00201   #error "ETHARP_QUEUE_FIRST option is deprecated. Remove it from your lwipopts.h."
00202 #endif
00203 #ifdef ETHARP_ALWAYS_INSERT
00204   #error "ETHARP_ALWAYS_INSERT option is deprecated. Remove it from your lwipopts.h."
00205 #endif
00206 #if SO_REUSE
00207 /* I removed the lot since this was an ugly hack. It broke the raw-API.
00208    It also came with many ugly goto's, Christiaan Simons. */
00209   #error "SO_REUSE currently unavailable, this was a hack"
00210 #endif
00211 
00212 #ifdef LWIP_DEBUG
00213 static void
00214 lwip_sanity_check(void)
00215 {
00216   /* Warnings */
00217 #if LWIP_NETCONN
00218   if (MEMP_NUM_NETCONN > (MEMP_NUM_TCP_PCB+MEMP_NUM_TCP_PCB_LISTEN+MEMP_NUM_UDP_PCB+MEMP_NUM_RAW_PCB))
00219     LWIP_PLATFORM_DIAG(("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\n"));
00220 #endif /* LWIP_NETCONN */
00221 #if LWIP_TCP
00222   if (MEMP_NUM_TCP_SEG < TCP_SND_QUEUELEN)
00223     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: MEMP_NUM_TCP_SEG should be at least as big as TCP_SND_QUEUELEN\n"));
00224   if (TCP_SND_BUF < 2 * TCP_MSS)
00225     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_SND_BUF must be at least as much as (2 * TCP_MSS) for things to work smoothly\n"));
00226   if (TCP_SND_QUEUELEN < (2 * (TCP_SND_BUF/TCP_MSS)))
00227     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_SND_QUEUELEN must be at least as much as (2 * TCP_SND_BUF/TCP_MSS) for things to work\n"));
00228   if (TCP_SNDLOWAT >= TCP_SND_BUF)
00229     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_SNDLOWAT must be less than TCP_SND_BUF.\n"));
00230   if (TCP_SNDQUEUELOWAT >= TCP_SND_QUEUELEN)
00231     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_SNDQUEUELOWAT must be less than TCP_SND_QUEUELEN.\n"));
00232   if (TCP_WND > (PBUF_POOL_SIZE*PBUF_POOL_BUFSIZE))
00233     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_WND is larger than space provided by PBUF_POOL_SIZE*PBUF_POOL_BUFSIZE\n"));
00234   if (TCP_WND < TCP_MSS)
00235     LWIP_PLATFORM_DIAG(("lwip_sanity_check: WARNING: TCP_WND is smaller than MSS\n"));
00236 #endif /* LWIP_TCP */
00237 }
00238 #else  /* LWIP_DEBUG */
00239 #define lwip_sanity_check()
00240 #endif /* LWIP_DEBUG */
00241 
00242 /**
00243  * Perform Sanity check of user-configurable values, and initialize all modules.
00244  */
00245 void
00246 lwip_init(void)
00247 {
00248   /* Sanity check user-configurable values */
00249   lwip_sanity_check();
00250 
00251   /* Modules initialization */
00252   stats_init();
00253   sys_init();
00254   mem_init();
00255   memp_init();
00256   pbuf_init();
00257   netif_init();
00258 #if LWIP_SOCKET
00259   lwip_socket_init();
00260 #endif /* LWIP_SOCKET */
00261   ip_init();
00262 #if LWIP_ARP
00263   etharp_init();
00264 #endif /* LWIP_ARP */
00265 #if LWIP_RAW
00266   raw_init();
00267 #endif /* LWIP_RAW */
00268 #if LWIP_UDP
00269   udp_init();
00270 #endif /* LWIP_UDP */
00271 #if LWIP_TCP
00272   tcp_init();
00273 #endif /* LWIP_TCP */
00274 #if LWIP_SNMP
00275   snmp_init();
00276 #endif /* LWIP_SNMP */
00277 #if LWIP_AUTOIP
00278   autoip_init();
00279 #endif /* LWIP_AUTOIP */
00280 #if LWIP_IGMP
00281   igmp_init();
00282 #endif /* LWIP_IGMP */
00283 #if LWIP_DNS
00284   dns_init();
00285 #endif /* LWIP_DNS */
00286 
00287   sys_timeouts_init();
00288 }