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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_130/] [src/] [api/] [tcpip.c] - Rev 609
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/** * @file * Sequential API Main thread module * */ /* * Copyright (c) 2001-2004 Swedish Institute of Computer Science. * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY * OF SUCH DAMAGE. * * This file is part of the lwIP TCP/IP stack. * * Author: Adam Dunkels <adam@sics.se> * */ #include "lwip/opt.h" #if !NO_SYS /* don't build if not configured for use in lwipopts.h */ #include "lwip/sys.h" #include "lwip/memp.h" #include "lwip/pbuf.h" #include "lwip/ip_frag.h" #include "lwip/tcp.h" #include "lwip/autoip.h" #include "lwip/dhcp.h" #include "lwip/igmp.h" #include "lwip/dns.h" #include "lwip/tcpip.h" #include "lwip/init.h" #include "netif/etharp.h" #include "netif/ppp_oe.h" /* global variables */ static void (* tcpip_init_done)(void *arg); static void *tcpip_init_done_arg; static sys_mbox_t mbox = SYS_MBOX_NULL; #if LWIP_TCPIP_CORE_LOCKING /** The global semaphore to lock the stack. */ sys_sem_t lock_tcpip_core; #endif /* LWIP_TCPIP_CORE_LOCKING */ #if LWIP_TCP /* global variable that shows if the tcp timer is currently scheduled or not */ static int tcpip_tcp_timer_active; /** * Timer callback function that calls tcp_tmr() and reschedules itself. * * @param arg unused argument */ static void tcpip_tcp_timer(void *arg) { LWIP_UNUSED_ARG(arg); /* call TCP timer handler */ tcp_tmr(); /* timer still needed? */ if (tcp_active_pcbs || tcp_tw_pcbs) { /* restart timer */ sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); } else { /* disable timer */ tcpip_tcp_timer_active = 0; } } #if !NO_SYS /** * Called from TCP_REG when registering a new PCB: * the reason is to have the TCP timer only running when * there are active (or time-wait) PCBs. */ void tcp_timer_needed(void) { /* timer is off but needed again? */ if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) { /* enable and start timer */ tcpip_tcp_timer_active = 1; sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL); } } #endif /* !NO_SYS */ #endif /* LWIP_TCP */ #if IP_REASSEMBLY /** * Timer callback function that calls ip_reass_tmr() and reschedules itself. * * @param arg unused argument */ static void ip_reass_timer(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n")); ip_reass_tmr(); sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL); } #endif /* IP_REASSEMBLY */ #if LWIP_ARP /** * Timer callback function that calls etharp_tmr() and reschedules itself. * * @param arg unused argument */ static void arp_timer(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: etharp_tmr()\n")); etharp_tmr(); sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL); } #endif /* LWIP_ARP */ #if LWIP_DHCP /** * Timer callback function that calls dhcp_coarse_tmr() and reschedules itself. * * @param arg unused argument */ static void dhcp_timer_coarse(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_coarse_tmr()\n")); dhcp_coarse_tmr(); sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL); } /** * Timer callback function that calls dhcp_fine_tmr() and reschedules itself. * * @param arg unused argument */ static void dhcp_timer_fine(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_fine_tmr()\n")); dhcp_fine_tmr(); sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL); } #endif /* LWIP_DHCP */ #if LWIP_AUTOIP /** * Timer callback function that calls autoip_tmr() and reschedules itself. * * @param arg unused argument */ static void autoip_timer(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: autoip_tmr()\n")); autoip_tmr(); sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL); } #endif /* LWIP_AUTOIP */ #if LWIP_IGMP /** * Timer callback function that calls igmp_tmr() and reschedules itself. * * @param arg unused argument */ static void igmp_timer(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: igmp_tmr()\n")); igmp_tmr(); sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL); } #endif /* LWIP_IGMP */ #if LWIP_DNS /** * Timer callback function that calls dns_tmr() and reschedules itself. * * @param arg unused argument */ static void dns_timer(void *arg) { LWIP_UNUSED_ARG(arg); LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dns_tmr()\n")); dns_tmr(); sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL); } #endif /* LWIP_DNS */ /** * The main lwIP thread. This thread has exclusive access to lwIP core functions * (unless access to them is not locked). Other threads communicate with this * thread using message boxes. * * It also starts all the timers to make sure they are running in the right * thread context. * * @param arg unused argument */ static void tcpip_thread(void *arg) { struct tcpip_msg *msg; LWIP_UNUSED_ARG(arg); #if IP_REASSEMBLY sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL); #endif /* IP_REASSEMBLY */ #if LWIP_ARP sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL); #endif /* LWIP_ARP */ #if LWIP_DHCP sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL); sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL); #endif /* LWIP_DHCP */ #if LWIP_AUTOIP sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL); #endif /* LWIP_AUTOIP */ #if LWIP_IGMP sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL); #endif /* LWIP_IGMP */ #if LWIP_DNS sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL); #endif /* LWIP_DNS */ if (tcpip_init_done != NULL) { tcpip_init_done(tcpip_init_done_arg); } LOCK_TCPIP_CORE(); while (1) { /* MAIN Loop */ sys_mbox_fetch(mbox, (void *)&msg); switch (msg->type) { #if LWIP_NETCONN case TCPIP_MSG_API: LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg)); msg->msg.apimsg->function(&(msg->msg.apimsg->msg)); break; #endif /* LWIP_NETCONN */ case TCPIP_MSG_INPKT: LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg)); #if LWIP_ARP if (msg->msg.inp.netif->flags & NETIF_FLAG_ETHARP) { ethernet_input(msg->msg.inp.p, msg->msg.inp.netif); } else #endif /* LWIP_ARP */ { ip_input(msg->msg.inp.p, msg->msg.inp.netif); } memp_free(MEMP_TCPIP_MSG_INPKT, msg); break; #if LWIP_NETIF_API case TCPIP_MSG_NETIFAPI: LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: Netif API message %p\n", (void *)msg)); msg->msg.netifapimsg->function(&(msg->msg.netifapimsg->msg)); break; #endif /* LWIP_NETIF_API */ case TCPIP_MSG_CALLBACK: LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg)); msg->msg.cb.f(msg->msg.cb.ctx); memp_free(MEMP_TCPIP_MSG_API, msg); break; case TCPIP_MSG_TIMEOUT: LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg)); if(msg->msg.tmo.msecs != 0xffffffff) sys_timeout (msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg); else sys_untimeout (msg->msg.tmo.h, msg->msg.tmo.arg); memp_free(MEMP_TCPIP_MSG_API, msg); break; default: break; } } } /** * Pass a received packet to tcpip_thread for input processing * * @param p the received packet, p->payload pointing to the Ethernet header or * to an IP header (if netif doesn't got NETIF_FLAG_ETHARP flag) * @param inp the network interface on which the packet was received */ err_t tcpip_input(struct pbuf *p, struct netif *inp) { struct tcpip_msg *msg; if (mbox != SYS_MBOX_NULL) { msg = memp_malloc(MEMP_TCPIP_MSG_INPKT); if (msg == NULL) { return ERR_MEM; } msg->type = TCPIP_MSG_INPKT; msg->msg.inp.p = p; msg->msg.inp.netif = inp; if (sys_mbox_trypost(mbox, msg) != ERR_OK) { memp_free(MEMP_TCPIP_MSG_INPKT, msg); return ERR_MEM; } return ERR_OK; } return ERR_VAL; } /** * Call a specific function in the thread context of * tcpip_thread for easy access synchronization. * A function called in that way may access lwIP core code * without fearing concurrent access. * * @param f the function to call * @param ctx parameter passed to f * @param block 1 to block until the request is posted, 0 to non-blocking mode * @return ERR_OK if the function was called, another err_t if not */ err_t tcpip_callback_with_block(void (*f)(void *ctx), void *ctx, u8_t block) { struct tcpip_msg *msg; if (mbox != SYS_MBOX_NULL) { msg = memp_malloc(MEMP_TCPIP_MSG_API); if (msg == NULL) { return ERR_MEM; } msg->type = TCPIP_MSG_CALLBACK; msg->msg.cb.f = f; msg->msg.cb.ctx = ctx; if (block) { sys_mbox_post(mbox, msg); } else { if (sys_mbox_trypost(mbox, msg) != ERR_OK) { memp_free(MEMP_TCPIP_MSG_API, msg); return ERR_MEM; } } return ERR_OK; } return ERR_VAL; } err_t tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg) { struct tcpip_msg *msg; if (mbox != SYS_MBOX_NULL) { msg = memp_malloc(MEMP_TCPIP_MSG_API); if (msg == NULL) { return ERR_MEM; } msg->type = TCPIP_MSG_TIMEOUT; msg->msg.tmo.msecs = msecs; msg->msg.tmo.h = h; msg->msg.tmo.arg = arg; sys_mbox_post(mbox, msg); return ERR_OK; } return ERR_VAL; } #if LWIP_NETCONN /** * Call the lower part of a netconn_* function * This function is then running in the thread context * of tcpip_thread and has exclusive access to lwIP core code. * * @param apimsg a struct containing the function to call and its parameters * @return ERR_OK if the function was called, another err_t if not */ err_t tcpip_apimsg(struct api_msg *apimsg) { struct tcpip_msg msg; if (mbox != SYS_MBOX_NULL) { msg.type = TCPIP_MSG_API; msg.msg.apimsg = apimsg; sys_mbox_post(mbox, &msg); sys_arch_sem_wait(apimsg->msg.conn->op_completed, 0); return ERR_OK; } return ERR_VAL; } #if LWIP_TCPIP_CORE_LOCKING /** * Call the lower part of a netconn_* function * This function has exclusive access to lwIP core code by locking it * before the function is called. * * @param apimsg a struct containing the function to call and its parameters * @return ERR_OK (only for compatibility fo tcpip_apimsg()) */ err_t tcpip_apimsg_lock(struct api_msg *apimsg) { LOCK_TCPIP_CORE(); apimsg->function(&(apimsg->msg)); UNLOCK_TCPIP_CORE(); return ERR_OK; } #endif /* LWIP_TCPIP_CORE_LOCKING */ #endif /* LWIP_NETCONN */ #if LWIP_NETIF_API #if !LWIP_TCPIP_CORE_LOCKING /** * Much like tcpip_apimsg, but calls the lower part of a netifapi_* * function. * * @param netifapimsg a struct containing the function to call and its parameters * @return error code given back by the function that was called */ err_t tcpip_netifapi(struct netifapi_msg* netifapimsg) { struct tcpip_msg msg; if (mbox != SYS_MBOX_NULL) { netifapimsg->msg.sem = sys_sem_new(0); if (netifapimsg->msg.sem == SYS_SEM_NULL) { netifapimsg->msg.err = ERR_MEM; return netifapimsg->msg.err; } msg.type = TCPIP_MSG_NETIFAPI; msg.msg.netifapimsg = netifapimsg; sys_mbox_post(mbox, &msg); sys_sem_wait(netifapimsg->msg.sem); sys_sem_free(netifapimsg->msg.sem); return netifapimsg->msg.err; } return ERR_VAL; } #else /* !LWIP_TCPIP_CORE_LOCKING */ /** * Call the lower part of a netifapi_* function * This function has exclusive access to lwIP core code by locking it * before the function is called. * * @param netifapimsg a struct containing the function to call and its parameters * @return ERR_OK (only for compatibility fo tcpip_netifapi()) */ err_t tcpip_netifapi_lock(struct netifapi_msg* netifapimsg) { LOCK_TCPIP_CORE(); netifapimsg->function(&(netifapimsg->msg)); UNLOCK_TCPIP_CORE(); return netifapimsg->msg.err; } #endif /* !LWIP_TCPIP_CORE_LOCKING */ #endif /* LWIP_NETIF_API */ /** * Initialize this module: * - initialize all sub modules * - start the tcpip_thread * * @param initfunc a function to call when tcpip_thread is running and finished initializing * @param arg argument to pass to initfunc */ void tcpip_init(void (* initfunc)(void *), void *arg) { lwip_init(); tcpip_init_done = initfunc; tcpip_init_done_arg = arg; mbox = sys_mbox_new(TCPIP_MBOX_SIZE); #if LWIP_TCPIP_CORE_LOCKING lock_tcpip_core = sys_sem_new(1); #endif /* LWIP_TCPIP_CORE_LOCKING */ sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO); } #endif /* !NO_SYS */
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