Add FreeRTOS-Plus directory.

FreeRTOS/Demo/ARM9_STR91X_IAR/lwip/lwipWebServer/httpd.c

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+/*
+ * Copyright (c) 2001-2003 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/debug.h"
+#include "lwip/stats.h"
+#include "httpd.h"
+#include "lwip/tcp.h"
+#include "fs.h"
+
+#include <string.h>
+
+#pragma pack(2)
+struct http_state {
+  char *file;
+  u32_t left;
+  u8_t retries;
+};
+#pragma pack()
+
+/*-----------------------------------------------------------------------------------*/
+void conn_err(void *arg, err_t err)
+{
+  struct http_state *hs;
+
+  hs = arg;
+  mem_free(hs);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+close_conn(struct tcp_pcb *pcb, struct http_state *hs)
+{
+  tcp_arg(pcb, NULL);
+  tcp_sent(pcb, NULL);
+  tcp_recv(pcb, NULL);
+  mem_free(hs);
+  tcp_close(pcb);
+}
+/*-----------------------------------------------------------------------------------*/
+static void
+send_data(struct tcp_pcb *pcb, struct http_state *hs)
+{
+  err_t err;
+  u16_t len;
+
+  /* We cannot send more data than space available in the send
+     buffer. */
+  if (tcp_sndbuf(pcb) < hs->left) {
+    len = tcp_sndbuf(pcb);
+  } else {
+    len = hs->left;
+  }
+
+  do {
+    err = tcp_write(pcb, hs->file, len, 0);
+    if (err == ERR_MEM) {
+      len /= 2;
+    }
+  } while (err == ERR_MEM && len > 1);
+
+  if (err == ERR_OK) {
+    hs->file += len;
+    hs->left -= len;
+    /*  } else {
+	printf("send_data: error %s len %d %d\n", lwip_strerr(err), len, tcp_sndbuf(pcb));*/
+  }
+}
+/*-----------------------------------------------------------------------------------*/
+err_t http_poll(void *arg, struct tcp_pcb *pcb)
+{
+  struct http_state *hs;
+
+  hs = arg;
+
+  /*  printf("Polll\n");*/
+  if (hs == NULL) {
+    /*    printf("Null, close\n");*/
+    tcp_abort(pcb);
+    return ERR_ABRT;
+  } else {
+    ++hs->retries;
+    if (hs->retries == 4) {
+      tcp_abort(pcb);
+      return ERR_ABRT;
+    }
+    send_data(pcb, hs);
+  }
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+err_t http_sent(void *arg, struct tcp_pcb *pcb, u16_t len)
+{
+  struct http_state *hs;
+
+  hs = arg;
+
+  hs->retries = 0;
+
+  if (hs->left > 0) {
+    send_data(pcb, hs);
+  } else {
+    close_conn(pcb, hs);
+  }
+
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+err_t http_recv(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
+{
+  int i;
+  char *data;
+  struct fs_file file;
+  struct http_state *hs;
+
+  hs = arg;
+
+  if (err == ERR_OK && p != NULL) {
+
+    /* Inform TCP that we have taken the data. */
+    tcp_recved(pcb, p->tot_len);
+
+    if (hs->file == NULL) {
+      data = p->payload;
+
+      if (strncmp(data, "GET ", 4) == 0) {
+        for(i = 0; i < 40; i++) {
+          if (((char *)data + 4)[i] == ' ' ||
+             ((char *)data + 4)[i] == '\r' ||
+             ((char *)data + 4)[i] == '\n') {
+            ((char *)data + 4)[i] = 0;
+          }
+        }
+
+        if (*(char *)(data + 4) == '/' &&
+           *(char *)(data + 5) == 0) {
+          fs_open("/index.html", &file);
+        }
+        else {
+          if (!fs_open((char *)data + 4, &file)) {
+            fs_open("/404.html", &file);	
+          }
+        }
+        hs->file = file.data;
+        hs->left = file.len;
+        /*	printf("data %p len %ld\n", hs->file, hs->left);*/
+
+        pbuf_free(p);
+        send_data(pcb, hs);
+
+        /* Tell TCP that we wish be to informed of data that has been
+           successfully sent by a call to the http_sent() function. */
+        tcp_sent(pcb, http_sent);
+      } else {
+        pbuf_free(p);
+        close_conn(pcb, hs);
+      }
+    } else {
+      pbuf_free(p);
+   }
+  }
+
+  if (err == ERR_OK && p == NULL) {
+    close_conn(pcb, hs);
+  }
+  return ERR_OK;
+}
+/*-----------------------------------------------------------------------------------*/
+err_t http_accept(void *arg, struct tcp_pcb *pcb, err_t err)
+{
+  struct http_state *hs;
+
+  tcp_setprio(pcb, TCP_PRIO_MIN);
+
+  /* Allocate memory for the structure that holds the state of the
+     connection. */
+  hs = mem_malloc(sizeof(struct http_state));
+
+  if (hs == NULL) {
+//    printf("http_accept: Out of memory\n");
+    return ERR_MEM;
+  }
+
+  /* Initialize the structure. */
+  hs->file = NULL;
+  hs->left = 0;
+  hs->retries = 0;
+
+  /* Tell TCP that this is the structure we wish to be passed for our
+     callbacks. */
+  tcp_arg(pcb, hs);
+
+
+  /* Tell TCP that we wish to be informed of incoming data by a call
+     to the http_recv() function. */
+  tcp_recv(pcb, http_recv);
+
+  tcp_err(pcb, conn_err);
+
+  tcp_poll(pcb, http_poll, 4);
+
+  return ERR_OK;
+}
+
+/*-----------------------------------------------------------------------------------*/
+void httpd_init(void)
+{
+  struct tcp_pcb *pcb;
+
+  pcb = tcp_new();
+  tcp_bind(pcb, NULL, 80);
+  pcb = tcp_listen(pcb);
+  tcp_accept(pcb, http_accept);
+}
+/*-----------------------------------------------------------------------------------*/
+