initial commit of lk (little kernel) project
diff --git a/lib/lwip/src/api/tcpip.c b/lib/lwip/src/api/tcpip.c
new file mode 100644
index 0000000..ce8a2ca
--- /dev/null
+++ b/lib/lwip/src/api/tcpip.c
@@ -0,0 +1,198 @@
+/*
+ * 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"
+
+#include "lwip/sys.h"
+
+#include "lwip/memp.h"
+#include "lwip/pbuf.h"
+
+#include "lwip/ip.h"
+#include "lwip/ip_frag.h"
+#include "lwip/udp.h"
+#include "lwip/tcp.h"
+
+#include "lwip/tcpip.h"
+
+static void (* tcpip_init_done)(void *arg) = NULL;
+static void *tcpip_init_done_arg;
+static sys_mbox_t mbox;
+
+#if LWIP_TCP
+static int tcpip_tcp_timer_active = 0;
+
+static void
+tcpip_tcp_timer(void *arg)
+{
+ (void)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
+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
+static void
+ip_timer(void *data)
+{
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n"));
+ ip_reass_tmr();
+ sys_timeout(1000, ip_timer, NULL);
+}
+#endif
+
+static void
+tcpip_thread(void *arg)
+{
+ struct tcpip_msg *msg;
+
+ (void)arg;
+
+ ip_init();
+#if LWIP_UDP
+ udp_init();
+#endif
+#if LWIP_TCP
+ tcp_init();
+#endif
+#if IP_REASSEMBLY
+ sys_timeout(1000, ip_timer, NULL);
+#endif
+ if (tcpip_init_done != NULL) {
+ tcpip_init_done(tcpip_init_done_arg);
+ }
+
+ while (1) { /* MAIN Loop */
+ sys_mbox_fetch(mbox, (void *)&msg);
+ switch (msg->type) {
+ case TCPIP_MSG_API:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
+ api_msg_input(msg->msg.apimsg);
+ break;
+ case TCPIP_MSG_INPUT:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: IP packet %p\n", (void *)msg));
+ ip_input(msg->msg.inp.p, msg->msg.inp.netif);
+ break;
+ case TCPIP_MSG_CALLBACK:
+ LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
+ msg->msg.cb.f(msg->msg.cb.ctx);
+ break;
+ default:
+ break;
+ }
+ memp_free(MEMP_TCPIP_MSG, msg);
+ }
+}
+
+err_t
+tcpip_input(struct pbuf *p, struct netif *inp)
+{
+ struct tcpip_msg *msg;
+
+ msg = memp_malloc(MEMP_TCPIP_MSG);
+ if (msg == NULL) {
+ pbuf_free(p);
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_INPUT;
+ msg->msg.inp.p = p;
+ msg->msg.inp.netif = inp;
+ sys_mbox_post(mbox, msg);
+ return ERR_OK;
+}
+
+err_t
+tcpip_callback(void (*f)(void *ctx), void *ctx)
+{
+ struct tcpip_msg *msg;
+
+ msg = memp_malloc(MEMP_TCPIP_MSG);
+ if (msg == NULL) {
+ return ERR_MEM;
+ }
+
+ msg->type = TCPIP_MSG_CALLBACK;
+ msg->msg.cb.f = f;
+ msg->msg.cb.ctx = ctx;
+ sys_mbox_post(mbox, msg);
+ return ERR_OK;
+}
+
+void
+tcpip_apimsg(struct api_msg *apimsg)
+{
+ struct tcpip_msg *msg;
+ msg = memp_malloc(MEMP_TCPIP_MSG);
+ if (msg == NULL) {
+ memp_free(MEMP_API_MSG, apimsg);
+ return;
+ }
+ msg->type = TCPIP_MSG_API;
+ msg->msg.apimsg = apimsg;
+ sys_mbox_post(mbox, msg);
+}
+
+void
+tcpip_init(void (* initfunc)(void *), void *arg)
+{
+ tcpip_init_done = initfunc;
+ tcpip_init_done_arg = arg;
+ mbox = sys_mbox_new();
+ sys_thread_new(tcpip_thread, NULL, TCPIP_THREAD_PRIO);
+}
+
+
+
+