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contiki/examples/ipv6/rpl-border-router/httpd-simple.c

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/*
* Copyright (c) 2010, 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. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*
*/
/**
* \file
* A simple web server forwarding page generation to a protothread
* \author
* Adam Dunkels <adam@sics.se>
* Niclas Finne <nfi@sics.se>
* Joakim Eriksson <joakime@sics.se>
*/
#include <stdio.h>
#include <string.h>
#include "contiki-net.h"
//#include "urlconv.h"
#include "httpd-simple.h"
#define webserver_log_file(...)
#define webserver_log(...)
#ifndef WEBSERVER_CONF_CFS_CONNS
#define CONNS UIP_CONNS
#else /* WEBSERVER_CONF_CFS_CONNS */
#define CONNS WEBSERVER_CONF_CFS_CONNS
#endif /* WEBSERVER_CONF_CFS_CONNS */
#ifndef WEBSERVER_CONF_CFS_URLCONV
#define URLCONV 0
#else /* WEBSERVER_CONF_CFS_URLCONV */
#define URLCONV WEBSERVER_CONF_CFS_URLCONV
#endif /* WEBSERVER_CONF_CFS_URLCONV */
#define STATE_WAITING 0
#define STATE_OUTPUT 1
MEMB(conns, struct httpd_state, CONNS);
#define ISO_nl 0x0a
#define ISO_space 0x20
#define ISO_period 0x2e
#define ISO_slash 0x2f
/*---------------------------------------------------------------------------*/
static const char *NOT_FOUND = "<html><body bgcolor=\"white\">"
"<center>"
"<h1>404 - file not found</h1>"
"</center>"
"</body>"
"</html>";
/*---------------------------------------------------------------------------*/
static
PT_THREAD(send_string(struct httpd_state *s, const char *str))
{
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, str);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
const char http_content_type_html[] = "Content-type: text/html\r\n\r\n";
static
PT_THREAD(send_headers(struct httpd_state *s, const char *statushdr))
{
/* char *ptr; */
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, statushdr);
/* ptr = strrchr(s->filename, ISO_period); */
/* if(ptr == NULL) { */
/* s->ptr = http_content_type_plain; */
/* } else if(strcmp(http_html, ptr) == 0) { */
/* s->ptr = http_content_type_html; */
/* } else if(strcmp(http_css, ptr) == 0) { */
/* s->ptr = http_content_type_css; */
/* } else if(strcmp(http_png, ptr) == 0) { */
/* s->ptr = http_content_type_png; */
/* } else if(strcmp(http_gif, ptr) == 0) { */
/* s->ptr = http_content_type_gif; */
/* } else if(strcmp(http_jpg, ptr) == 0) { */
/* s->ptr = http_content_type_jpg; */
/* } else { */
/* s->ptr = http_content_type_binary; */
/* } */
/* SEND_STRING(&s->sout, s->ptr); */
SEND_STRING(&s->sout, http_content_type_html);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
const char http_header_200[] = "HTTP/1.0 200 OK\r\nServer: Contiki/2.4 http://www.sics.se/contiki/\r\nConnection: close\r\n";
const char http_header_404[] = "HTTP/1.0 404 Not found\r\nServer: Contiki/2.4 http://www.sics.se/contiki/\r\nConnection: close\r\n";
static
PT_THREAD(handle_output(struct httpd_state *s))
{
PT_BEGIN(&s->outputpt);
s->script = NULL;
s->script = httpd_simple_get_script(&s->filename[1]);
if(s->script == NULL) {
strncpy(s->filename, "/notfound.html", sizeof(s->filename));
PT_WAIT_THREAD(&s->outputpt,
send_headers(s, http_header_404));
PT_WAIT_THREAD(&s->outputpt,
send_string(s, NOT_FOUND));
uip_close();
webserver_log_file(&uip_conn->ripaddr, "404 - not found");
PT_EXIT(&s->outputpt);
} else {
PT_WAIT_THREAD(&s->outputpt,
send_headers(s, http_header_200));
PT_WAIT_THREAD(&s->outputpt, s->script(s));
}
s->script = NULL;
PSOCK_CLOSE(&s->sout);
PT_END(&s->outputpt);
}
/*---------------------------------------------------------------------------*/
const char http_get[] = "GET ";
const char http_index_html[] = "/index.html";
//const char http_referer[] = "Referer:"
static
PT_THREAD(handle_input(struct httpd_state *s))
{
PSOCK_BEGIN(&s->sin);
PSOCK_READTO(&s->sin, ISO_space);
if(strncmp(s->inputbuf, http_get, 4) != 0) {
PSOCK_CLOSE_EXIT(&s->sin);
}
PSOCK_READTO(&s->sin, ISO_space);
if(s->inputbuf[0] != ISO_slash) {
PSOCK_CLOSE_EXIT(&s->sin);
}
#if URLCONV
s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
urlconv_tofilename(s->filename, s->inputbuf, sizeof(s->filename));
#else /* URLCONV */
if(s->inputbuf[1] == ISO_space) {
strncpy(s->filename, http_index_html, sizeof(s->filename));
} else {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 1] = 0;
strncpy(s->filename, s->inputbuf, sizeof(s->filename));
}
#endif /* URLCONV */
webserver_log_file(&uip_conn->ripaddr, s->filename);
s->state = STATE_OUTPUT;
while(1) {
PSOCK_READTO(&s->sin, ISO_nl);
#if 0
if(strncmp(s->inputbuf, http_referer, 8) == 0) {
s->inputbuf[PSOCK_DATALEN(&s->sin) - 2] = 0;
webserver_log(s->inputbuf);
}
#endif
}
PSOCK_END(&s->sin);
}
/*---------------------------------------------------------------------------*/
static void
handle_connection(struct httpd_state *s)
{
handle_input(s);
if(s->state == STATE_OUTPUT) {
handle_output(s);
}
}
/*---------------------------------------------------------------------------*/
void
httpd_appcall(void *state)
{
struct httpd_state *s = (struct httpd_state *)state;
if(uip_closed() || uip_aborted() || uip_timedout()) {
if(s != NULL) {
s->script = NULL;
memb_free(&conns, s);
}
} else if(uip_connected()) {
s = (struct httpd_state *)memb_alloc(&conns);
if(s == NULL) {
uip_abort();
webserver_log_file(&uip_conn->ripaddr, "reset (no memory block)");
return;
}
tcp_markconn(uip_conn, s);
PSOCK_INIT(&s->sin, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
PSOCK_INIT(&s->sout, (uint8_t *)s->inputbuf, sizeof(s->inputbuf) - 1);
PT_INIT(&s->outputpt);
s->script = NULL;
s->state = STATE_WAITING;
timer_set(&s->timer, CLOCK_SECOND * 10);
handle_connection(s);
} else if(s != NULL) {
if(uip_poll()) {
if(timer_expired(&s->timer)) {
uip_abort();
s->script = NULL;
memb_free(&conns, s);
webserver_log_file(&uip_conn->ripaddr, "reset (timeout)");
}
} else {
timer_restart(&s->timer);
}
handle_connection(s);
} else {
uip_abort();
}
}
/*---------------------------------------------------------------------------*/
void
httpd_init(void)
{
tcp_listen(UIP_HTONS(80));
memb_init(&conns);
#if URLCONV
urlconv_init();
#endif /* URLCONV */
}
/*---------------------------------------------------------------------------*/
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