nes-proj/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-net.h"
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#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, (uint8_t *)"", tosend);
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bytes_to_send -= len;
}
tcp_socket_close(&socket);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/