TCP socket server example

examples/tcp-socket/Makefile

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+all: tcp-server
+
+CONTIKI=../..
+
+include $(CONTIKI)/Makefile.include

examples/tcp-socket/tcp-server.c

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+/*
+ * Copyright (c) 2012, Thingsquare, http://www.thingsquare.com/.
+ * 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. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``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
+ * COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ *
+ */
+
+#include "contiki.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define SERVER_PORT 80
+
+static struct tcp_socket socket;
+
+#define INPUTBUFSIZE 400
+static uint8_t inputbuf[INPUTBUFSIZE];
+
+#define OUTPUTBUFSIZE 400
+static uint8_t outputbuf[OUTPUTBUFSIZE];
+
+PROCESS(tcp_server_process, "TCP echo process");
+AUTOSTART_PROCESSES(&tcp_server_process);
+static uint8_t get_received;
+static int bytes_to_send;
+/*---------------------------------------------------------------------------*/
+static int
+input(struct tcp_socket *s, void *ptr,
+      const uint8_t *inputptr, int inputdatalen)
+{
+  printf("input %d bytes '%s'\n", inputdatalen, inputptr);
+  if(!get_received) {
+    /* See if we have a full GET request in the buffer. */
+    if(strncmp((char *)inputptr, "GET /", 5) == 0 &&
+       atoi((char *)&inputptr[5]) != 0) {
+      bytes_to_send = atoi((char *)&inputptr[5]);
+      printf("bytes_to_send %d\n", bytes_to_send);
+      return 0;
+    }
+    printf("inputptr '%.*s'\n", inputdatalen, inputptr);
+    /* Return the number of data bytes we received, to keep them all
+       in the buffer. */
+    return inputdatalen;
+  } else {
+    /* Discard everything */
+    return 0; /* all data consumed */
+  }
+}
+/*---------------------------------------------------------------------------*/
+static void
+event(struct tcp_socket *s, void *ptr,
+      tcp_socket_event_t ev)
+{
+  printf("event %d\n", ev);
+}
+/*---------------------------------------------------------------------------*/
+PROCESS_THREAD(tcp_server_process, ev, data)
+{
+  PROCESS_BEGIN();
+
+  tcp_socket_register(&socket, NULL,
+               inputbuf, sizeof(inputbuf),
+               outputbuf, sizeof(outputbuf),
+               input, event);
+  tcp_socket_listen(&socket, SERVER_PORT);
+
+  printf("Listening on %d\n", SERVER_PORT);
+  while(1) {
+    PROCESS_PAUSE();
+
+    if(bytes_to_send > 0) {
+      /* Send header */
+      printf("sending header\n");
+      tcp_socket_send_str(&socket, "HTTP/1.0 200 ok\r\nServer: Contiki tcp-socket example\r\n\r\n");
+
+      /* Send data */
+      printf("sending data\n");
+      while(bytes_to_send > 0) {
+        PROCESS_PAUSE();
+        int len, tosend;
+#define MIN(a,b) ((a)<(b)?(a):(b))
+        tosend = MIN(bytes_to_send, sizeof(outputbuf));
+        len = tcp_socket_send(&socket, "", tosend);
+        bytes_to_send -= len;
+      }
+
+      tcp_socket_close(&socket);
+    }
+
+  }
+  PROCESS_END();
+}
+/*---------------------------------------------------------------------------*/