--- /dev/null
+/**
+ * @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 */
git.joshuawise.com / netwatch.git / blobdiff